Abstract:The filling and emptying system selection is the key issues of navigation lock design. For the filling and emptying system，type selection mainly considers the deviation caused by the design head H and the water filling emptying time T. In this paper，according to the energy dissipation mechanism of the filling and emptying system，combined with the influences of water head，filling and emptying time，chamber dimension and initial water depth on the basis of the traditional discrimination index m，two dimensionless energy per unit area indexes mL and mc are introduced. The decision indexes of 123 navigation locks with different characters are counted，then the relationship between the indexes and the filling and emptying system is established using gray system theory. Finally，using the filling and emptying system selection model，the filling and emptying system of 13 typical ship locks are calculated and compared with the industry codes. The results show that this method quantifies the filling and emptying system selection process；the filling and emptying system selected by this method has high accuracy and good practical value.

Abstract:Docking optimization is an important means to improve the operation efficiency of ship lift. Aiming at the operation characteristics of upstream docking mechanism of Jinghong hydro-floating ship lift，we ascertain the control line of upstream docking process through theoretical calculation，propose the optimization scheme，investigate the safety of the upstream docking optimization scheme，demonstrate the effect in the prototype monitoring，and propose the optimization method of upstream docking efficiency of Jinghong ship lift. The results show that under existing conditions，the optimization of upstream docking process for Jinghong ship lift can save about 25% of upstream docking time and 20% of docking-releasing time，and improve overall running efficiency of ship lift.

Abstract:The size of Wan’an second-line lock’s chamber is large and its hydraulic head is relatively high. Besides，its water level variation and hydraulic index requirements have reached the forefront of the single-stage locks built in the world，therefore the cavitation and vibration of valve section will be more prominent if no effective optimizations are taken. Based on a constant flow pressure reduction model test of the valve，we observe the valve section cavitation behavior and calculate the critical cavitation number. According to the characteristics of valve section，a combined ventilation method （valve lintel natural ventilation +drop-sill forced ventilation） is put forward to improve the valve cavitation condition，which can solve the problem of valve cavitation of Wan’an second-line lock with a hydraulic head of 32.5 m.

Abstract:The steel wire rope is a flexible medium for connecting the balance weight and the ship chamber in the mechanical connection system of the hydro-floating ship lift. The deformation characteristics of the steel wire rope during the operation are closely related to the stability of ship lift，and the research significance is clear. According to the deformation of the wire rope，a one-dimensional simulation calculation is carried out to analysis the deformation characteristics of the rope end，then to reveal the additional displacement characteristics of the ship chamber or balance weight caused by the elastic deformation of the wire rope during operation.In addition，a three-dimensional coupling model of “synchronous shaft-steel wire rope-water carrying ship chamber”is established to study the influence of the elastic modulus of the steel wire rope on ship chamber’s longitudinal inclination，and the response law of ship chamber’s longitudinal inclination to the elastic modulus of the wire rope is obtained.

Abstract:The arrangement of miter gate library of ship lock relates closely to the local flow structure and smoothness of water exchange during opening and closing of the miter gate. It directly affects the values of opening and closing force and the hydrodynamic resisting torque of the miter gate，and it’s very important for the high-head and large-scale lock. This paper analyzes the characteristics of local flow structure during opening and closing of the miter gate by the mathematical model，demonstrates the influences of boundary conditions on the hydrodynamic resisting torque，and puts forward the arrangement technology of the miter gate library of the high-head and large-scale ship lock，gives a scientific and reasonable shape of miter gate library and the characteristic sizes，which can significantly reduce the initial and final peak value of the hydrodynamic resisting torque，so as to solve the design problems of the miter gate and hoisting equipment of the high-head and large-scale ship lock. It is beneficial for the miter gate to operate safely and reliably.

Abstract:Through physical modeling experiments，we study the effects of the mean breaking wave parameter，the relative width of the shoulder platform，the relative height of the wave wall and the relative height of the dike on wave overtopping of the seawall under the action of irregular waves，apply the artificial intelligence algorithm to establish the predictive model for wave overtopping，and verify the model combined with the actual project. The results show that wave overtopping increases with the increase of the mean breaking wave parameter and decreases with the increase of the other three influencing parameters. The wave overtopping has a complex nonlinear function relationship with these four factors. The artificial intelligence algorithm model has good predictive accuracy and generalized performance. The prediction errors of the over 90% data in the test group are within ±10%.

Abstract:Shulanghu Island is located in the offshore of Hangzhou Bay. The coastline topography is intricate and the wave and current hydrodynamic conditions are complicated. In order to study the conditions for deepwater port construction，we use the field data，nautical charts and remote sensing satellite data around the island to analyze the characteristics of the hydrodynamic environment and beach evolution. Based on that，mathematical model of wave transformation in the nearshore region and 2-D tidal current and sediment mathematical model are applied to calculate wave fields and tidal flow fields in the area，as well as the design wave factor，flow conditions and sediment deposition of the planning scheme. Based on the characteristics of the hydrodynamic and sediment environment in the area，we analyze and summarize the general layout of the scheme and the conditions of harbor construction in different bank sections from the viewpoint of hydrodynamic and sediment conditions. The conclusion can provide the basis and technical support for the determination and further study of the planning scheme，and also provide a reference for the layout of wharf schemes under similar complex coastline topography and dynamic environment.

Abstract:Seismic effects may cause destruction，such as soil liquefaction，losing of slope stability and settlement of foundation. Certain connections are embodied in these forms of destruction，and the accurate liquefaction calculation is crucial and fundamental to the analysis of seismic effects. We compare the common liquefaction evaluating methods，such as the code method and simplified method etc to analyze the applicability and accuracy of these methods，determine the strength degradation in soils through the liquefaction extent to incorporate in the calculation of slope stability，and combine the three forms of destruction to analyze the influence of seismic effects on the bank slope by an engineering example. The results show that the strength loss and settlement of soil are closely related to the degree of liquefaction. The soil parameters under seismic load level should be used in slope stability analysis，and separate calculation methods of seismic settlement should be determined according to the liquefaction potential.

Abstract:Nondestructive and rapid damage detection method of pile foundation in high-pile wharf is a research hotspot in engineering field. In this paper，we design a dynamic damage detection mode，and study the applicability of modal flexibility in damage detection of the pile foundation in high-pile wharf through a finite element model（FEM） simulation and a physical model test. The results show that：1）The modal flexibility can accurately detect the location of the damage in finite element simulation. The greater the damage degree，the greater change of modal flexibility.The variation of modal flexibility can qualitatively reflect the damage degree of the structure. 2）The modal flexibility obtained based on the physical model can reflect the damage location，but the damage detection effect is not as good as that in the FEM simulation due to the existence of noise and test error，and the damage degree cannot be reflected. The extensive application of modal flexibility damage detection of pile foundation in high-pile wharf needs further development of dynamic testing technology and modal analysis technology.

Abstract:In view of the engineering problem caused by the damage of the gravity quay protection unit under the action of the ship jet，the Dutch method and the German method recommended by PIANC，as well as the algorithm recommended by The Rock Manual，are analyzed and compared.It is concluded that the Dutch method is more suitable for the design of block stone bottom protection，and the German method has good applicability in the problem of homogeneous soil or graded soil erosion；gravity wharves can appropriately increase the calculated value of the bottom protection erosion velocity.Based on the research results，taking a port project in Africa as an example，the Dutch method is used to design the gravity quay protection unit.

Abstract:In order to research the influence of different connection properties on the dynamic characteristics of the structure，we use software of ABAQUS to establish a refined finite element model，carry out the process analysis of the overall structure of the gravity piled wharf with low pile cushion caps formed by two methods of anchoring and frictional connection，and study the seismic response law of the structure corresponding to the two connection properties.The results show that at the end of the earthquake，the residual displacement of the anchored connection structure is smaller than that of the friction contact structure. The difference between the horizontal peak acceleration of the friction contact structure is larger than that of the anchor connection structure. The maximum and minimum tensile （compressive） stresses of the anchor connection structure are smaller than those of the friction contact structure. The maximum dynamic earth pressure value and the ratio of the maximum and minimum dynamic earth pressure of the friction contact structure are larger than those of the anchor connection structure.

Abstract:The import of LNG plays an important role in China’s natural gas supply system. Based on the analysis of the status of berth construction，the type of LNG vessel，ship density and berth utilization in China’s coastal and sub-regional liquefied natural gas （LNG），this paper puts forward the conclusions that most LNG berth capacity in coastal areas of China has not been fully released and the utilization of LNG berths in local areas is not balanced in off-peak season due to various factors such as unbalanced consumption demand and inadequate capacity of supporting facilities. Furthermore，according to the distribution law of LNG ship structure and ship density in each region，the utilization rate of LNG berths is calculated in light and peak seasons，and the average utilization rate of berths in coastal areas and the parameters of the utilization rate of berths with the highest peak month in some areas are put forward. On this basis，combined with the characteristics of LNG berths operation and ship supervision，the problems existing in the operation of LNG berths in coastal areas are pointed out and corresponding suggestions are put forward. The research conclusions can provide reference for regional LNG port planning and design.

Abstract:At present，the design of port pavement in most parts of Africa adopts the Structural design of heavy duty pavements for ports and other industries （edition 4），while French-speaking countries in West Africa tend to adopt French standards. However，there is no specific standards for the design of the port pavement in current，and it refers to the standards for the design of road. Because the design method of directly multiple loads to standard loads in the French standard for road design cannot reflect the actual combination of port loads，it cannot be directly applied to the design for port pavement. Therefore，based on the pavement design of a new port in West Africa，this paper introduces a port pavement design method for port pavement under combined load with French standard. By comparing with the British standard design method，this paper analyzes the differences of design methods and pavement structure between the French standards and British standards，which provides support for the adoption of French standard.

Abstract:To further understand the working mechanism of the gravity quay unloading slab，a finite element generalized model was established，and the numerical calculation and analysis of the gravity quay with unloading slab was performed. The results show that：1）The overall structure is a deformation mode rotating around the unloading plate and behind the wall. 2）The upper wall is displaced behind the wall and squeezes the back soil to form a passive pressure zone，and the increase rate of soil pressure at the back of the wall is 40.2%. The displacement of the lower wall toward the front of the wall forms an active unloading zone，the unloading efficiency of the earth pressure on the back of the wall is 35.4%，which cancels each other out，the change of the lateral earth pressure on the back of the wall has a limited effect on the structural stability. 3）The active earth pressure formula is multiplied by an increase factor of 1.5，and the earth pressure on the lower wall can be directly calculated according to the Rankine active earth pressure formula. 4）The lateral earth pressure on the upper wall increases，the lateral earth pressure on the lower wall decreases，and the unloading plate the increase in the weight of the top filler （including ground load） and the increase in the weight of the cantilever section contribute to the anti-sliding stability of the terminal are -21.1%，24.6%，75.6%，and 20.9%；the contribution to the anti-tilt stability of the terminal are -13.4%，6.6%，86.3% and 20.5%，the latter two are the main contributing factors. 5）The stability of the dock increases with the cantilever length of the unloading plate，and the optimal position of the unloading plate is about 0.6 times the wall height.

Abstract:With the development of international shipping industry，the demand for expanding the yard space is increasing. But the port land resource is increasingly scarce. To increase the container storage capacity significantly and reduce the container dump rate under the condition of limited storage area in the port，we propose a new yard mode which is based on the automatic tridimensional storage technology. Comparing with other traditional yard types，this mode shows excellent performance in land utility. Through optimizes and improves the existing yard system，this mode increases the yard storage capacity and decreases the dump rate，and realizes efficient port production and operation.

Abstract:Based on the practical project，the reasons for the looseness and fall of the rail pressure plate of the unloading trolley in the steel gallery at the port of the coal silo，the local wear of the rail，the gap between the expansion joints of the rail，the left and right displacement，and the vertical elevation difference exceeding the standard are analyzed. The flexible track fixing system and high-speed rail track fixing system are compared and studied with the traditional unloading trolley track fixing system. The results show that no matter which track fixing system is used，the track fasteners need to be regularly inspected and maintained. Under heavy loads or when the use frequency is high，flexible track fixing systems should be given priority to extend the maintenance-free time of the track.

Abstract:Aiming at the problems of unclear assessment level，unfocused emphasis，and poorly targeted measures in the safety risk assessment practice of large-scale petrochemical port areas，this paper constructs an indicator system based on inherent risk factors，risk prevention and control capability as the basic indicators，and establishes the mathematic model of safety risk calculation based on the analytic hierarchy process （AHP）.Combined with the safety management status of large domestic petrochemical port areas，the classification standards for security risks are proposed，and finally a quantitative assessment of the regional security risk level of large petrochemical port areas is realized. Empirical research is carried out by safety risk assessment of a typically large petrochemical port area，it is concluded that the regional safety risk is level III （larger risk）.

Abstract:Since the operation of Xiangjiaba hydropower station in Jinsha River，it brings great benefits to the society and economy，meanwhile the unsteady flow process brings disadvantageous effects to the passage of vessels in the channel from Yibin to Luzhou in the upper reaches of the Yangtze River. In order to increase the cargo capacity of more large and medium-sized ship and can be smoothly through the channel along the dangerous shoal，we use the optimization of one dimensional unsteady flow mathematical model to calculate Yibin to Luzhou channel along the discharge and water level process，analyze unsteady deep water resources space-time distribution in accordance with the verified calculation results，and obtain the along propagation time during the dry season of Yibin to Luzhou channel under unsteady flow，the best navigation time of Yibin and ship speed on dangerous shoal.

Abstract:In view of the development of the Yangtze estuary channel，we study the current situation and conditions of the channel，and adopt the method of comparative analysis of channel service supply and actual demand to analyze the existing problems in the overall navigation capacity of the Yangtzeestuary channel，the navigation depth of the south passage，the navigation safety of the south channel，etc.，and put forward suggestions including optimizing the navigation management of the north passage，promoting the construction of the south passage phase I project，studying the development and construction of the north channel，improving the navigation safety level of the south channel，and planning the development of the north branch，so as to provide reference for the construction and development of the Yangtze estuary channel during the “14th Five-Year Plan” period.

Abstract:The Lancang-Mekong River channel phase II remediation project is 631 km in length，which is characterized by large drop，rapid water flow，large flow velocity，and complicated water regime. Multiple devices and technologies are used for segment management and implementation in hydrographic survey，such as the slop survey，the hydrological section survey and the surface velocity and flow direction surrey ect., among which，the electronic buoy method has a good effect on the measurements of the surface flow velocity and flow direction of a river section with a large flow velocity，thus it may serve as reference for the hydrological survey of long-distance mountainous river channel regulation.

Abstract:We use the thermal analysis module of ANSYS software to establish the finite element model of transversal seepage in the permeable lock chamber，study the distribution characteristics of transversal seepage in the permeable chamber under maintenance condition，and discuss the effect of vertical seepage control facilities in different positions. The results show that the distribution of seepage pressure head and seepage gradient are not uniform. The distribution of pressure head along contour lines can be divided into rapid loss section，loss retarding section and slow loss section according to the rate of pressure head loss. The seepage gradient at the chamber bottom increases from the symmetric axes to the end. The seepage gradient at the bottom of the chamber wall increases from one side with the sheet pile to the other side without the sheet pile. When the sheet piles are in the same length，the back sheet pile can significantly reduce the seepage pressure at the bottom of chamber wall compared with the front sheet pile，while the front sheet pile has a better control effect on the exit gradient of chamber and the seepage gradient at the bottom of chamber wall.

Abstract:In view of the limited through capacity of the artificial long channel in Huanghua coal port area，we study the influence of strict navigation rules for over-limit ships such as LNG ships on navigation efficiency of coal ships. According to the current situation of navigation management，we adopt the multi-agent simulation modeling method to establish a simulation model of ship-channel-berth operation in coal port area，and quantitatively evaluate the influence of the navigation efficiency caused by the over-limit ships entering and leaving the port through the analysis of six working conditions. The results show that when the number of over-limit ships reaches 70 per year，coal ships delay caused by the single over-limit ship will be more than 2.4，and the average delay time is more than 1.1 h. Moreover，the stricter the regulation rules of over-limit ships are，the greater the impact is. It is suggested that the coal port area should strictly regulate the number of over-limit ships to ensure the passing capacity of coal ships.

Abstract:The channel expansion project of Jiantan to Hengli river section is bend，and wide and narrow alternated. There are many shoals which are linked together. Sediment transport capacity of the river section is limited. Sand mining activities are very serious. So the project has high integrity and strong linkage effect with river section. According to the principle of obstruct features by rapids and overall optimization，the regulation principles of the dredging mainly，combination of renovation and dredge，controlling river regime，and stable trough are proposed. The navigation channel should be arranged along the channel deep line. Variable bottom slope design is adopted in longitudinal excavation. Trapezoid section or compound section is adopted in the transverse direction. The layout of regulation buildings should be improved. Width of regulation line should be narrow. The existing spur dikes should be fully used. New spur dikes should be built and old spur dikes should be extended. The fixed bed model test and sediment physical model test are carried out. The changes of water level，gradient and velocity along the channel after reconstruction are analyzed. The amount of erosion and deposition of channel sediment is determined，and the rationality of reconstruction measures is studied. The results show that after the regulation，the water level and gradient along the channel decrease，and the channel velocity increases. The average annual sedimentation volume is 39,800 m3. The upgrading measures are reasonable and feasible.

Abstract:In order to guarantee the regulation effect of the downstream channel of the junction and make it reach the standard of planned channel grade，we take Longxikou in the Minjiang River to Yibin 81km channel regulation project as an example，analyze the possible design discharge of upstream junction operation，and study the channel scale under different design discharge by plane two-dimensional flow model. The results show that in the future，the average discharge in dry season （November to next year April） can be increased to 1 757 m3s through the junction operation of the main and tributary reservoirs in the upper reaches of the Minjiang River. When the upstream daily average discharge is more than 900 m3s，the downstream discharge of Longxikou can be more than 900 m3s by reverse regulation. When the discharge is 900 m3s，the navigation depth of the lower reach of the Minjiang River can satisfy the requirements of 2.4 m navigation depth of class III channel. For these reasons，the design minimum navigable discharge of Longxikou in the Minjiang River to Yibin 81km channel should be 900 m3/s.

Abstract:According to the historical data and recent measured data of Wuzhou Hydrological Station of Xijiang River Control Station，based on the analysis of the variation characteristics of Wuzhou design water level，this paper calculates the design flow and downstream design water level，and the design water level before and after the project by the mathematical model. Considering the influences of riverbed undercutting，tidal action，engineering dredging and other factors under the dam of the hub，this paper calculates and analyzes the design lowest navigable water level of Wuzhou Hydrological Station for the 3000-ton waterway project，so as to provide reference for setting relevant water levels for nearby project construction and similar waterway regulation.

Abstract:Dafutan ship lock is located at the bank of Jiangxinzhou in the bifurcated reach. In view of the problem that the gate area of the downstream approach channel of the lock has a large oblique flow and return flow，and the confluence area of the two branches at the tail of the lock has a large oblique flow，so ships’ safe navigation can not be guaranteed，we put forward improvement measures，and all regulation schemes are verified by adopting the 180 normal overall hydraulic physical model. The results show that the recommended measures of prolonging the length of the downstream navigation wall of the lock and constructing a new downstream dam can effectively improve the navigation flow conditions of the downstream lock.

Abstract:The gulf regulation project is a new marine industry in recent years. In view of the characteristics of the complex topography，many professional types，many design drawings and many professional cross sections in the design process of the gulf regulation project，we carry out the design and management of the gulf regulation project based on BIM collaborative platform. Building BIM collaborative platform and utilizing the advantages of BIM’s visualization and synergy to aid the design management，we solve the problems caused by the above characteristics，and draw the conclusion as follows：based on the collaborative platform，we can carry out multi-specialty meeting and examination，synthesize coordination，optimize design，improve design efficiency and quality greatly，and establish the design management database to provide a basis for the later decision-making of similar projects；due to the visualization of BIM，the surrounding environment of the project is incorporated into design to assist the space validation and type selection.

Abstract:The operation of the automated terminal system is divided into four parts including state perception，real-time analysis，scientific decision making and accurate execution. State perception is the first step and the foundation of the next three steps. In case practice of Qingdao port automated terminal，this paper appiles empirical validation method and quantitative analysis method to study the sensing technology used in Qingdao port automation terminal，and obtain the application results and the disadvantage of sensing technology in automated terminal. The results show that the process and equipment operation of the automatic terminal are realized data-driven. The sensing information achieves full coverage，high-precision and full automation. The improvement of equipment complexity and the reduction of stability are the urgent problems to be solved.

Abstract:Aiming at the similarities and differences of design method for pile foundation bearing capacity between Spanish Rom code and Chinese JTS code，we summarize the design method for single pile of Spanish Rom code and application scope of the two methods，and analyze and compare the bearing capacity of compressive pile and tensile pile. Combining with the engineering practice，we calculate and compare the bearing capacity of compressive pile and tensile pile according to Spanish Rom code and Chinese JTS code. The results show that design value of allowable bearing capacity of compressive pile calculated by Chinese JTS code is smaller than that of Spanish Rom code，but the design value of allowable bearing capacity of tensile pile calculated by Chinese JTS code is larger than that of Spanish Rom code.

Abstract:The determination of the axial bearing capacity of the pile foundation is one of the essential contents of the design for high-piled wharves. However，in the preliminary design of overseas projects，the geological survey data is usually too simple and lacks the necessary parameters required for the design. Therefore，the data of standard penetration test （SPT） is very important. In this paper，combining the provisions of the British standard BS8004 on calculating the axial bearing capacity of pile foundations based on SPT，and by analyzing relevant research results of several scholars，we compare coefficients of unit skin friction resistance and unit end bearing resistance between the BS standard and relative research. The value of the empirical coefficient of pile side and pile tip friction resistance per unit area is discussed，and a reasonable recommended value of the empirical coefficient in the calculation of the axial bearing capacity of the pile foundation is given. Finally，combined with static pile loading test data and pile dynamic load test，the rationality of the empirical is verified，which can provide a reference for similar overseas projects.

Abstract:The construction of traditional riprap revetment is very difficult in the deep water area of the lower reaches of the Yangtze River because of the deep water and rapid flow. In recent years，net pocket riprap and caisson riprap construction technology have developed rapidly. Taking the riprap revetment project of Laohaiba dam of the Yangtze River as an example，the riprap construction qualities and costs of the two technologies are compared，and the construction qualities are analyzed from two aspects of thickening value and uniformity. The results show that the direct costs of caisson riprap are high，but the thickening effect，construction uniformity and efficiency of caisson riprap are better than net pocket riprap. Through the comparison of riprap effect in different study areas，it can be seen that in terms of effect stability control，caisson riprap technology is better than net pocket riprap.

Abstract:The cavitation performance of the dredging pump is an important index to determine the construction capacity of the super large trailing suction dredger. However，the domestic dredging pumps often lack cavitation performance data. Taking the first domestic super-large 18，000 m3 trailing suction hopper dredger as the object，the cavitation performance of dredging pump is researched，and the fluid dynamics model is established. Firstly，the relationship between flow rate and flow head，flow efficiency，flow power are obtained，and the reliability of the model is verified by comparing with the experimental data. Complete cavitation model is applied to study the cavitation performance，and the critical efficiency decrease value which is more strict than the abroad criteria is used as the critical cavitation point. Then the NPSHr data of different flow rates at a certain dredging speed are obtained. The research methods and conclusions are used for reference for engineering and specific dredger.

Abstract:There is a broad market for upgrade and transform projects of old wharves all over the world with many requirements for design ideas，schemes，construction techniques and technical risk control. Combining with the design and construction of a gravity wharf upgrade with a cast-in-situ deck in East Africa，we summarize the design optimization of main structures such as the slope of dredging，types and layout of piles，deck styles，and the key points of reconstruction such as basin dredging with high SPT blow count，stability control of existing structures，construction procedures of the cast-in-situ deck. The results show that the design and construction scheme is feasible and reliable，which can provide references for the similar projects.

Abstract:Chinese construction enterprises have undertaken many wharf projects along the“One Belt and One Road”countries in recent years. However，lack of in-depth understanding of foreign codes brings great trouble for the construction. Taking the construction code for wharf structures of China and the execution code for bored piles of Europe EN 1536 as examples，the differences of certain part about bored cast-in-situ piles between the two codes are compared in detail in this paper. The main conclusions are as follows：1）The classification of piles in Chinese code is different from that in European code or academic method. 2）The European code establishes general principles for the execution of bored cast-in-situ piles，while there are more detailed quantitative indicators in Chinese code. 3） The European code specifies the requirements for pile bearing capacity and integrity testing，while the Chinese code has fewer requirements. Related comparisons are beneficial for Chinese construction enterprises to carry out foreign wharf projects.

Abstract:During transportation of rocky and silty dredging material，more wear and tear to reclamation pipelines will be caused by the crushed rock. Burst and uneven wear of reclamation pipelines will reduce the effective operation time of the cutter suction dredger and service life of reclamation pipelines. According to the comparison of reclamation pipelines of Chinese and European dredging companies in Saudi Aramco Berri drilling islands project，we find that the European dredging company adds the quick coupling structure to reclamation pipelines and sinker pipelines adopt welded steel pipelines to meet the reclamation pipelines’s requirements for the rock reclamation work，and the result may serve as reference for the Chinese dredging company to choose and manufacture pipelines for the rock reclamation project.

Abstract:The most suitable type of protection for the bank slope of the deep groove in the Yangtze River in complex flow regimes is rock throwing. However，due to the depletion of the source of block stones，it is urgent to find a suitable protective material. Based on the existing engineering practice in the Nanjing section of the Yangtze River，sandbags are used for the first time to protect the deep groove slope of the Yangtze River in the complex flow ingress. This study introduces the structural section，sandbag body type，filling，geotextile and other relevant design conditions of the deep groove slope protection project on the right edge of the head of Nanjing Baguazhou in the Yangtze River. This paper analyzes and studied the key issues of how to ensure the accurate location of sandbag drop points. This study adopts the solution measures such as preferred construction ship，reasonable layered partition，production test，secondary positioning method，dynamic measurement correction，and increasing the detection frequency to ensure the quality of the project and provided the basis for similar projects.