Abstract:The Macau Airport’s reclamation project has narrowed the connecting waterway that connects Ka-Ho Bay and Macau Waterway，and the hydrodynamic environment around the project has also changed accordingly. We establish a numerical model of tidal current dynamics in the sea area near Macau，simulate the tidal current changes in Ka-Ho Bay before and after the Macau Airport reclamation project based on the CJK3D model，and discuss the response mechanism of tidal dynamics and water exchange capacity in Ka-Ho Bay to reclamation from the aspects of tidal characteristics and water exchange cycle.The results show that：1）The reclamation project of Macau Airport will not cause the overall flow pattern of Macau waters to change，but its narrowing effect will cause Ka-Ho Bay to approach a semi-enclosed bay. 2）The flux of ebb and flow tides in the section of bay mouth has decreased significantly，and the tidal current velocity decreases. The half exchange period increases，and the tidal power and water exchange capacity are weakened.

Abstract:In view ofthe problems of post-construction settlement and overtopping of sloping seawall，taking the Wenzhou Shoal phase I reclamation slope seawall as the research object，the post-construction seawall top settlement and cross-section form of the seawall are analyzed. The post-construction average overtopping of seawall under irregular wave is studied through the model test of typical section，and the influencing factors of overtopping are analyzed. The results show that：1）The top settlement of each section for the south dike and the east dike are uneven，and the section form has been significantly changed due to settlement and sediment deposition.2）The post-construction average overtopping of seawall is corrected by adopting the wave oblique incidence coefficient. The influencing factors change of typical sections for the south dike and the east dike leads to the regular change of overtopping，and the overtopping meets the requirements of specifications.

Abstract:To verify the wave dissipation effect of a new type of low-permeability breakwater with pile foundations，this paper carries out model prediction and evaluation after on-site wave observation. The relative wave height of the internal and the external areas，which can reflect the wave dissipation effect of the breakwater，is obtained by the sectional model test，the whole model test and the post-observation of wave data on both sides of the breakwater. The results show that in the conditions of water depth＞10 m，H1/10＞2.5 m and nearly 180° open sea area，the structure is able to meet the requirement that the relative wave height is controlled within 0.3. In the actual sea conditions，the relative wave height has a significant relationship with the external wave steepness and the tide level. Generally，the wave steepness is larger and the relative wave height is smaller when the tide level is lower.

Abstract:Given the low resolution of classification based on angular response features and the poor anti-noise performance of classification based on pixel statistical features in traditional sediment classification with multibeam backscatter images，this paper proposes an object-based sediment classification method. For this purpose，a general backscattering processing flow was adopted to obtain geocoded backscatter images after radiation distortion correction. Then，the simple linear iterative clustering（SLIC）algorithm was employed to segment the backscatter images into internally uniform and well-defined object blocks. Finally，the statistical features of each object block were extracted to construct feature vectors，and sediment classification was performed using K-Means ++ as a classifier. The proposed method improves the reliability of sediment classification to a classification accuracy of 86.96%.

Abstract:Aiming at the soft clay for foundation，we study the effects of recycled tire polymer fiber（RTPF）and glass fiber（GF）on the physical and mechanical properties of soft clay. We prepare the modified soil samples with different fiber types，fiber sizes and fiber contents，carry out the compaction test，unconfined compressive strength（UCS）test and direct shear test，analyze the variation rules of the indexes such as maximum dry density，UCS，cohesion and internal friction angle，and discuss the reasonable improved proportioning scheme. The results show that the incorporation of RTPF and GF decreases the maximum dry density，while the optimal water content increases. The incorporation of fiber is mainly to improve the shear strength of soft clay by increasing cohesion. There are critical fiber contents for RTPF and GF，which are 0.5% and 1.0% respectively. Beyond the critical content，the increase of fiber is unfavorable to the strength. Although RTPF may have better adhesion to clay than GF，its improvement effect is lower than that of GF because of larger diameter and smaller length-diameter ratio. Fiber size is also considered as an important factor for solidification.

Abstract:Aiming at the problem that the traditional sheet-pile structure presents excessive horizontal displacement in the application of large- scale wharf，especially for heavy load，soft soil foundation and deep water，we use the finite element software of PLAXIS 3D for simulation calculation，analyze the main factors causing the large horizontal displacement of the sheet-pile structure，formulate the effective countermeasures，and compare the horizontal displacement of the optimized scheme under the different water depth environments. The results show that the four specific measures of unloading measure on the structure，reasonable arrangement of mixing pile and jet-grouted pile，setting up good drainage channel，and reducing the mass of backfill material can effectively control the horizontal displacement，meet the limit value of British standard，and bring corresponding economic benefit at the same time.

Abstract:Wave is the controlling factor in the structural design of a pontoon for a yacht wharf. Given the complex motion and stress conditions of a spring anchorage concrete pontoon in waves，we focus on an actual project to summarize the general ideas and principles of selecting buoyancy tanks and anchorage structures for the yacht wharf. Then，we investigate the application conditions of the spring anchorage concrete pontoon and the main points in the structural design of such a concrete pontoon and use the finite-element method to analyze the motion response and structural stress characteristics of the concrete pontoon in waves. The results show that three-dimensional finite-element numerical analysis can be performed to analyze the wave response characteristics of such pontoons when the wave height exceeds 0.5 m and that this issue should be given due consideration in the general layout and detailed structural design of this type of pontoons.

Abstract:Under the influence of the COVID-19 pandemic and other external factors，container ports of Shanghai，Shenzhen，Guangzhou and other parts of China are experiencing congestion，which has become a concern of relevant departments and the industry on the adaptability of container terminals. After analyzing China’s container shipping demand and coastal container terminal capacity supply，we evaluate the basic situation of container terminal adaptability and put forward suggestions on the container terminal planning and construction according to the new development situation of container ports in the future. The results show that the capacity of container ports in the Bohai Rim，the Yangtze River Delta and the southwest coastal area is appropriately tight，while it is appropriately surplus in the Pearl River Delta and the southeast coastal area. Considering the development trend of the transportation demand，container ship type，COVID-19，etc.，we shall further optimize the container port layout and accelerate the construction of container terminals in regions with relatively tight port capacity. In addition，we should explore new technologies and models for the development of deep-water terminals in hub seaports and innovate the evaluation methods for terminal adaptability，which can better support the development of the national economy of China.

Abstract:As important parts of the port collection and distribution system，port railways are independent in design and generally follow a complete set of standards. The full adoption of Chinese standards is unlikely to satisfy local requirements and operating practices during the design of overseas port railways. Due to the particularity of port railways，the design ideas of the main line or ordinary station track cannot be replicated，while the port operation，general layout，and requirements for collection and distribution should be considered. For design tasks of overseas port railways，domestic design companies should adopt measures suiting local conditions including operating practices and signal systems. Meanwhile，they must also consider the design as a whole to meet special port needs. The Pakistan container port that integrates Chinese and Pakistan standards is utilized to illustrate the determination of design principles and standards，as well as the design of the general layout，cross-section，signal，and level crossing，providing a reference for similar projects.

Abstract:The design water depth is the primary factor in the site selection of catenary anchor leg mooring（CALM）. The current codes by the Classification Society provide a method for determining the design water depth with high requirements for basic data such as ship size and environmental parameters. Hardly are they applied directly in the early design stage of the project. This paper studies the motion response of mainstream moored ships in different environments by numerical analysis. It proposes the coefficient of design water depth based on the draught of moored ships which can directly calculate the minimum water depth. Furthermore，the calculation is compared with the test results of the physical model and existing engineering cases to show the reliability and applicability of the coefficient. The proposed coefficient and calculation method for the design water depth can provide a reference for the site selection of CALM in the early stage of the project.

Abstract:At present，the engineering application of concrete floating breakwaters is rare in China. Thus，we introduce the application of a pile guided concrete floating breakwater to a port project in Africa，including scheme selection and the settings of key parameters. We compare the pile guided concrete floating breakwater，conventional mound breakwater，and chain anchored concrete floating breakwater. In addition，we calculate the wave transmission coefficient of the pile guided concrete floating breakwater with an empirical formula and then compare it with the results from physical model tests conducted by others and the performance index of wave attenuation provided by the manufacturer. The results show that under the condition of a small wind wave height and a short period，the pile guided concrete floating breakwater performs well in wave attenuation，can function for boat berthing，and has the characteristic of easy demolition and position changing. The wave transmission coefficient calculated by the Macagno formula is relatively accurate，which can be used in the preliminary design phase.

Abstract:This paper aims to study the structural selection of a wharf under complex geological conditions in the open sea. Taking a 300，000-ton unloading wharf project in Ningbo as an example，the paper selects an inclined rock-socketed pile and a vertical rock-socketed pile as research objects according to the structural arrangement adaptability，construction technology，and construction cost with the consideration of hydrogeological characteristics. A comparative analysis method is used to analyze the above two pile arrangements technologically and economically. The results show that compared with the vertical rock-socketed pile with a large diameter，the inclined rock-socketed pile has the advantages of small pile diameter，strong tolerance to horizontal load，and low engineering cost，thus being more suitable and economical. In terms of the construction technology of the inclined rock-socketed pile，rotary drilling rigs have high reliability in construction quality. Regarding pile stabilization measures during the construction period，it is practical to use the gravel foundation bed to ensure the stability of the rock-socketed pile，which is suitable for the relatively short construction period in the open sea.

Abstract:Regarding the complicated and harsh navigable flow conditions at the approaching entrance region downstream of a navigation power hub，we compare and analyze the water flow conditions of the approaching entrance region under different separation levee arrangement schemes relying on an experimental study of a navigational power project. The results indicate that the separation levee can change the flow directions of the downstream flow in the main channel，and reduce the squeezing and friction by the mainstream on the water flow in the approaching entrance region. Compared with the scheme without the air-permeable separation levee，the installation of the air-permeable separation levee can reduce the cross flow and backflow caused by the main flow of the leakage at the bend. After increasing the length of the permeable separation levee，the direction of the flow velocity on the surface of the main flow can be changed to improve the navigable flow conditions of the downstream approaching entrance region on the curve. Furthermore，the reasonable application of the separation levee effectively reduces the lateral and reverse velocity caused by the main flow.

Abstract:By establishing a three-dimensional turbulence mathematical model，the hydraulic characteristics of the fishway pool of Bengbu sluice with the baffle layout are calculated to study the flow pattern，velocity of the pool and the resting pool，and the maximum vertical slot velocity. In particular，the velocities of 920 measuring points in 20 cross sections of the upper，middle and lower water layers of the typical pool and resting pool are statistically analyzed，and the transverse，longitudinal and vertical velocities of 140 measuring points are finely analyzed. The influence of the slope of the pool on the hydraulic characteristics of the pool is also studied. The results show that：1）The velocity and flow pattern of the upper，middle and lower water layers in fishway pool and resting pool are basically the same. The lower the water layer is，the higher the main flow velocity is. 2）The vertical velocity of flow in the pool is very small，and the flow presents two-dimensional characteristics. 3）The main flow velocity of the resting pool is equivalent to that of the main flow velocity of the pool （only 3.5% lower on average），but the area of the low-velocity zone is significantly increased （54% higher）.4）The slope of the pool slowed from 1:100 to 1:140，and the maximum velocity of vertical joint decreased by 16.9%. 5）The slope of the fishway pool of Bengbu Sluice is recommended to be 1:100~1:120 to meet the demand of fish upward tracking.

Abstract:As a common type of river，the flow characteristics of branching channel are of great significance in river bed evolution and channel maintenance. We take the branching channel as the research object，apply the physical model test of natural beach generalization，obtain the flow law of branching channel. The results show that there are low velocity zones in front and back of the beach，and the velocity distributions of the two branches are asymmetrical. The maximum velocities of two branches appear alternately. The variation of velocity along the river is consistent with the trend of beach elevation，and the maximum velocity appears at the highest point of the beach（under the condition of total flooding）. The diversion ratio decreases with the decrease of the branch width. When the beach is near the center of the channel，the diversion ratios of the two branches are equivalent. When the beach is near the shore，the diversion ratio of the narrower branch becomes smaller，but the velocity changes greatly，and the flow is more unstable.

Abstract:To evaluate the deformation control effect of the reinforcement scheme for channel under-passing railway bridge during excavation，this paper takes the second channel of the Grand Canal under-passing the Shanghai-Kunming high-speed railway as an example. It carries out a three-dimensional finite element simulation to analyze the displacement deformation of the soil and structures at different stages，including the construction of enclosure structures，channel excavation，concreting of channel structures，and channel navigation. In addition，it conducts the quantitative evaluation on the safety of the enclosure structures and bridge piers during the construction. The results show that the solid support system and layered excavation combined with multiple dewatering can alleviate excessive settlement and bottom heave caused by excavation. The reinforcement scheme also protects the existing structures，ensuring the running safety of trains during the construction.

Abstract:Nowadays，increasing attention has been paid to water transportation to achieve the goal of carbon neutrality. As an energy-saving and environmentally friendly transportation mode，water transportation plays an important role in regional transportation systems. The proportion of water transportation greatly influences the effect of energy conservation and emission reduction of regional transportation systems. From the perspective of Guangdong Province Waterway Development Plan （2020-2035），this paper focuses on the analysis of the development status and planning vision of inland waterways in Guangdong Province，predicts the change in the theoretical inland waterway transit capacity of the province，and explores the impact of the development of inland waterways on the carbon reduction in the regional transportation system of the province depending on the freight volume of its inland waterway. The results show that the upgrading of inland waterways in Guangdong greatly improves the theoretical inland waterway transit capacity and makes water transportation better share the goods transportation of highway and railway，which reduces the carbon emission of the regional transportation system in Guangdong by about 2.2%. This paper can provide a theoretical reference for the more rational construction of inland waterways in Guangdong.

Abstract:Nianpanshan lock is identified as Grade III，with a maximum design head of 14.2 m，belonging to a large medium-head lock. According to relevant project experience，the long-corridor filling and emptying system with side branch holes inside the lock wall is adopted. The recommended valve opening time is 6 min. The filling and emptying system and valve opening time directly affect the water flow and berthing conditions. Through the hydraulic calculation and 1:15 physical model，the hydraulic characteristics of the filling and emptying system，corridor pressure，and the berthing conditions of the lock chamber are analyzed. The results show that the adopted system is reasonable，and the hydraulic characteristic indexes under the designed valve opening mode can meet the requirements of design and codes.

Abstract:Due to the impact of original buildings and an upstream middle bar on the new-built ship lock of the Qixingdun junction，there are poor navigable flow conditions in the upstream areas. To solve this problem，this paper utilizes the overall hydraulic physical model and self-propelled ship model test to study the changes in the upstream flow conditions for the ship lock under different ship lock layout schemes and puts forward specific measures to improve flow conditions. The following results are obtained：1）Increasing the flow area near the entrance area and adjusting the route according to the flow direction of the model test can effectively improve the navigable flow conditions of the upstream entrance area and connecting section for the Qixingdun ship lock. 2）When the ship lock is arranged far from the shore and the water flow concentrates and obliquely passes through the entrance area，arranging a spur dike upstream to disperse the water flow in advance has a significant effect on improving the navigable flow conditions in the upstream entrance area for the ship lock.

Abstract:Regarding the problem that the protruding mouth 1.3 km upstream of the Dongjiang Xiajijiao pivotal dam and the tip of the secondary dam on the right bank causes a backflow area at the entrance area of the upper approach channel on the downstream right side（ashore side），the lateral velocity and the backflow velocity seriously exceed the standard，we establish a normal physical model with a scale of 1:100，compare the optimization and adjustment schemes including excavating the bulge on the right bank upstream of the dam，shortening the secondary dam on the right bank of the reservoir area，optimizing the connection form between the end of the secondary dam and the mountain，and shortening the upper approach channel，and study the navigable flow condition at the entrance area of the approach channel. The results show that above measures are effective to the improvement of the navigable condition of the entrance area of the approach channel，and the recommended scheme for the arrangement of the approach channel of Xiajijiao junction shiplock is determined.

Abstract:Aiming at the problems that Longzhaowan，in the middle reaches of the Jialing River，is affected by the sand mining，the sand pits are all over the place，the local water drop is obvious，the radius of the middle-low water is only 350 m，the water flow is trapped and bent seriously，and the current channel scale cannot meet the requirements of the channel grade after canalization，we study the navigation characteristics，regulation parameters and regulation scheme of typical bend rapids，use the methods of field investigation，hydrologic statistics，empirical formula and numerical simulation，obtain a better regulation scheme to improve the navigation conditions of Longzhaowan Beach and reach the channel grade after channelization. The results show that the combination of damming and dredging for this kind of shoal hazards can adjust the riverbed shape and control the river bottom dredging，also achieve the regulation effect of increasing the water depth of the channel，improving the navigation flow pattern，and ensuring navigation safety.

Abstract:The bank protection project is an important part of the waterway regulation project. The stability of the bank slope is related to the overall quality of the project，the navigation safety of the waterway，and even the safety of life and property of the coastal residents. Therefore，the stability of the bank slope is very important. In order to effectively analyze the stability of the wading bank slope，it is necessary to identify the material composition of the bank slope，the position of the sliding surface，and the formation conditions and the formation mechanism in the early stage. Taking a waterway regulation bank slope collapse area as the research object，the geological survey and geological exploration of the rear edge，middle part and outer side wall of the bank collapse area are carried out，and the material composition inside and outside the bank slope collapse area is preliminarily identified. The differences in the physical and mechanical properties of the soil layers inside and outside the bank collapse area are compared and analyzed through the standard penetration number，water content and direct shear index，and the formation conditions and formation mechanism of bank collapse are analyzed. The position of the slip plane is preliminarily determined，and the proposal for the treatment of the bank collapse area is put forward.

Abstract:Analyzing navigation-obstructing characteristics is particularly critical for the design of a sharp bend channel in a water-level-fluctuating zone upstream from a hydro-junction. Considering the complicated water flow conditions of the Matouling sharp bend upstream from the Wuxi Hydro-junction，we adopt the technical means of combining a two-dimensional planar mathematical water flow model with a ship model to study the navigation-obstructing characteristics of the bend river under different water level combinations. An optimization scheme is proposed by analyzing the channel depth and flow rate. The results show that the navigable design water level of a stage-fluctuating zone upstream from a hydro-junction is greatly affected by the operation scheduling plan of the hydro-junction. Adjusting the route on a sharp bend channel is an effective idea for optimizing navigable conditions. This research serves as a reference for the construction of similar projects.

Abstract:The channel in the downstream section of the Qianjiang Datengxia hydro-junction has complex and unfavorable flow patterns，frequent maritime incidents，and natural channel attributes in dry seasons，and thus the scale of the channel needs to be greatly improved. Considering these problems，two channel lines are arranged according to the principles of straightening the channel as much as possible and increasing the bending radius. Using the model of navigation flow conditions for experiments，we analyze the complex navigation-hampering flow conditions of the continuous beach group and obtain the optimization idea of eliminating the deflecting flow point，smoothing the flow edge，and effectively increasing the cross-sectional area of the flow for regulating navigation-hampering shoals. On the basis of the preliminary design scheme No.2，an optimization scheme is proposed to increase the radius of the curved top section and its upstream and downstream reef-blasting range and clear the left side beach and the right high beach. The verification by the physical model and ship model indicates that the optimized design scheme can effectively improve the flow patterns and navigation conditions.

Abstract:By means of mathematical model and ship handling simulation test，we analyze the navigation obstruction characteristics of the sharp bend channel in the reservoir area under the operation condition of low water level of the pivot，and improve the navigable conditions by optimizing the navigation scheme and adjusting the position of the anchorage. The results show that the ship’s traverse speed and drift can be significantly reduced by taking advantage of the large range of slow flow zone in the concave bank of the Matouling sharp bend section，and adopting the navigation scheme that the ship enters the slow flow zone along the right bank first，turns down and then leaves for the downstream. When the anchorage is adjusted from the front of the lock to the slow flow zone at the top of the bend，the circumferential water required for anchoring is significantly reduced，the traverse speed is only 0.4 m/s，and the maneuvering risk of lifting anchor into the lock is also lower. The above non-engineering measures play a positive role in ensuring the navigation safety of the sharp bend section.

Abstract:To solve the problems of low positioning frequency and poor accuracy of inland ships’ AIS data，the new generation of BeiDou Navigation Satellite System（BDS）is used for ship positioning. Through self-built data collection，analysis and storage services，the positioning accuracy has been improved to sub-meters and the data transmission frequency has been increased to seconds. Combined with automatic algorithms and spatial analysis technology in GIS，we carry out business applications of BDS，such as real-time dredging construction status visualization，electronic fence warning，automatic filling work orders，etc.，which reduce manual operations on the management of inland dredging ships and achieve the goal of refined，digital and intelligent management. The result is a successful application of BDS in the management of inland dredging ships，and it may serve as reference for similar projects to build an automated management system.

Abstract:In view that the current technical methods of port spatial planning and design are difficult to meet the requirements of information and intelligent development，we discuss the innovation direction of port spatial planning and design technology based on BIM and GIS technology，and put forward the technical framework of port spatial planning and design based on BIM and GIS. Through establishing the BIM and GIS planning and design integration platform including BIM model and platform，GIS analysis model and platform，model rendering and display platform，we deeply integrate BIM model and GIS environment，realize the unification of spatial data at macro scale and information model at micro scale to implement the spatial analysis，scene analysis，auxiliary design and rendering display. The research results improve the spatial visualization and analysis ability of planning and design scheme，and provide a technical support for port planning and design under the land spatial planning system.

Abstract:Building information modeling（BIM）and Internet of Things（IoT）technologies are more and more widely used in the infrastructure construction industry in recent years. However，they are not commonly applied in waterway engineering surveys. In view of the current situation，this paper studies the integrated application of BIM and IoT and explores their application in the safety management and control of waterway engineering surveys with the technical architecture and technical route of a survey management and control platform based on BIM and IoT. Taking a waterway project as an example，the paper realizes some applications for safety management and control of water survey operations with the help of the BIM+IoT platform，such as water mobile inspection，safety data management，and remote safety management and control. Practice has proved that the comprehensive utilization of BIM and IoT in the safety management and control of channel surveys has many advantages，such as the quality improvement of information service and the ability enhancement of early warning.

Abstract:With the development of large-scale reservoir port construction in inland mountainous areas，it is necessary to carry out reinforced high fill construction to obtain more land space. The interaction between wharf pile foundation of frontier operation platform and soil in reinforced fill area has become an important factor affecting wharf structural safety. Taking an overhead vertical wharf in the Three Gorges Reservoir area as an example，we discuss the law of soil arching effect behind piles in reinforced high fill area through indoor model test，and it is proved that the reinforcement effect is beneficial to improve and enhance the stress of pile foundation. By the finite element analysis method，the influences of reinforcement arrangement，slope of fill area and physical and mechanical parameters of soil on soil arching effect and pile foundation stress are systematically compared and analyzed，and suggestions are put forward for optimizing the design of pile foundation in reinforced high fill area.

Abstract:This paper aims to investigate the selection strategy of the bottom formwork support system for the integral cast-in-place construction of a long-span and continuous inclined beam of overhead-erection ramp wharf in the green port service demonstration area project in Xingshan County，Yichang City. It takes into account the influence of water level operation in the Three Gorges Reservoir area and the construction conditions without large crane ships. After comparing different schemes of the bottom formwork support system，this paper proposes a scheme，i.e.，the integral cast-in-place construction of a deck-type positive support structure with the combination of steel embedded parts at both ends and intermediate support. The determination，design and construction technology are also introduced regarding this scheme. The results show that the proposed scheme is feasible in practice，which can overcome the horizontal thrust generated during integral cast-in-place construction of inclined beams and guarantee the quality and safety of the project.

Abstract:DCM is a common ground improvement method for strengthening revetment on soft foundation. It is a common way to analyze the overall stability of revetment adopting composite foundation comprehensive strength design method. In some cases，the results of overall stability by the above method can satisfy the requirement of codes，but sliding accident happened. Thus the applicability of this method in revetment design needs further analysis. Focusing on a failed engineering project，we applied composite foundation comprehensive strength parameters，strength index of DCM piles and original soil parameters between DCM piles respectively to check the stability of revetment by software Plaxis 3D，and by changing the shearing strength of soft soil and replacement ratio of DCM，we analyze comparatively their influence on the overall stability. The results show that under the condition of low shearing strength of soft soil and low replacement ratio of DCM，the DCM composite foundation comprehensive strength method has a poor applicability in revetment design. It means comprehensive strength method can’t equivalently reflect DCM’s strengthening effect on very soft soil foundation.

Abstract:In order to satisfy the stability and use requirements of the superstructure，one or more acceptance indexes（liquefaction judgment，relative density，etc.）are often specified in the design of the foundation treatment on sand soil. How to judge that the treated foundation meets the acceptance index is the key problem. In view of the above problems，the correlation between the in-situ test data and the acceptance index is often established in engineering，and the empirical formula is obtained. In this paper，the acceptance curve（which satisfies the relationship between the minimum cone resistance qc and the soil depth）is determined comprehensively by comparing the commonly used formulas for calculating sand indexes based on CPT at home and abroad. The results show that：1）The effective internal friction angle and bearing capacity are not considered as the controlling factors while the relative density of sand is satisfied. 2）If the post-construction settlement does not meet the requirements，the acceptance criteria based on the relative density requirements should be appropriately raised. 3）CPT can provide continuous curve of soil layer data，and there is abundant data between it and soil properties. 4）The acceptance index based on CPT calculation can provide guidance for the foundation treatment technology.

Abstract:Seismic liquefaction sensitivity is usually denoted by the ant-liquefaction safety factor（FSliq），and its calculation strongly depends on the in-situ test technology. Given the different methods of sand liquefaction discrimination at home and abroad，this paper，relying on an overseas container terminal project，compares the seismic liquefaction sensitivity of two sites with two in-situ test technologies，i.e.，standard penetration test（SPT）and cone penetration test with pore pressure measurement（CPTu），employed respectively at home and abroad. The following observations can be made from the results：1）The two methods produce consistent analysis results，although those obtained by CPTu are more conservative on the whole. 2）CPTu can reveal more detailed soil characteristics，despite that corresponding FSliq calculated are more variable. 3）The applicability and accuracy of the SPT method are verified.