Abstract:The Kou’anzhi waterway is an important part in the second phase of the regulation project of 12.5 m deep water channel from Nanjing to the mouth in the Yangtze River. The upper part belongs to braided rivers of many branches,and the lower part is straight rivers. Moreover,the upper part locates in the curved channels,into which Huaihe river flows,the flood-plain changes violently,and the channel conditions are affected by many complicated factors. The large inflow of Huaihe river is the important formation cause for the Luochengzhou shoal. Using the numerical models,we investigate the effects of the Huaihe river inflow on the deep water channel in Kou’anzhi waterway. The simulated results show that the inflow of Huaihe river causes the amplitude and range of deposition in the Sanyiqiao beach above the estuary of Huaihe river and in the designed navigation channels of 12.5 m at the left branch increasing. Under these influences,the minimum width of the isobath below 12.5 m in the designed navigation channels at the left branch of Luochengzhou is mildly greater than that without regard to the Huaihe river inflow,the channel width in the designed navigation channels,dissatisfying with 12.5 m of water depth,slightly decreases in the Gaogang beach,while the similar channel width in the lower part of the right channel of Manyusha has a slight increase from that without considering the Huaihe river inflow.

Abstract:In phase 1 dredging engineering of the 12.5 m deepwater channel of the Yangtze River below Nanjing city,the situation of the Tongzhousha channel depth is influenced by the southward movement of the right edge of Kuzigangsha tail,which directly interferes with the dredging operation within area B. Based on the study on water-sand behaviors,bed sand and tidal features and analysis of flow regime and back-silting characteristics,we preset the sediment kerf to mitigate sand flowing from edges into the inner channel. An analysis of the implementation effect of sediment kerf is presented and advices are given to the follow-up construction.

Abstract:In engineering applications,for the revetment engineering under the wave action,the surface layer-filer layer-subsoil design patterns are usually used for the slope protection with a filter layer structure as the cushion;but in the practical project,the cushion structure is often simplified,with the geotextiles directly laid on the sand. Based on the theoretical analysis and model test,we study the impact of the cushion structure under the wave action,and comes to the conclusion that when the top layer’s permeability coefficient is less than that of the filer layer,the uplift force acting on the top layer will be generated inside the filer layer,which may lead to the instability of top layer. The results may serve as reference for the similar engineering.

Abstract:The critical chloride ions concentration of pitting corrosion and pitting corrosion rate of domestic rebar,anode ladders sensor rebar,and ECI-2 sensor rebar are investigated by potentiodynamic polarization and liner polarization respectively. The results show that the domestic rebar and ECI-2 sensor rebar have a similar critical chloride ions concentration of pitting corrosion and different pitting corrosion rates. However,the critical chloride ions concentration of pitting corrosion and pitting corrosion rate for the anode ladders sensor rebar are different from that of domestic rebar. Therefore,the monitoring results for the two sensors should be modified when they are used in domestic engineering to monitor its durability.

Abstract:The spectrum and statistical analysis are made of measured wave data with double-peaked spectra in the Xiangshui sea area. By investigating the wave heights probability distributions,the period probability distributions and the joint probability distributions of wave heights and periods of sea waves with double-peaked spectra,we know that sea waves with single-peaked spectra turn out to be not suitable for describing sea waves with double-peaked spectra. On the basis of measured wave data with double-peaked spectra in the Xiangshui sea area,we propose empirical probability distributions of wave heights and periods of sea waves with double-peaked spectra. Some spectral parameters related to the spectral width are calculated through spectrum analysis and compared with those of Goda’s field observation. Furthermore,the spectral characteristic values of sea waves with double-peaked spectra are compared with the statistical ones,and we find that there is only little difference between the significant wave height calculated by the spectrum method and the one calculated by the zero-crossing method;and the mean period calculated by spectrum period is a little bit smaller than that calculated by the zero-crossing method.

Abstract:Based on two dimensional nested gird tidal current and sediment numerical model，we simulate the tidal current field and distribution of suspended sediment in reclamation of Haizhou bay. The simulation fits well with the measured data. Analyzing the impact of the current field on the surrounding sea and the annual change in erosion and deposition after the project,we know that the whole calculated area tidal current and suspended filed change little. But decrease of the current velocity near the project causes reduction of the tidal prism. The deposition is presented near the project sea.The siltation intensity of the filling pit at the left is larger,and erosion is presented in part of Linghong river estuary.

Abstract:Along with the implementation of one belt and one load,more and more Chinese enterprisesare engaged in overseas engineering design,thus it requires to know the Euro code.This article sums up main points about the similarities and differences between the Euro code EN1992-1-1:2004 and China code JTS151—2011 both in principles and methods,values of material properties,load factors,load combinations,durability design and bearing capacity calculation.

Abstract:To compare the effects of the arc radius of different vertical breakwater crest walls on its wave load,we carry out the physical model experiment about the three arc crest walls with the arc radius of 45 cm,67 cm and 98 cm respectively and the vertical crest wall,and obtain wave loads from the integral of the wave pressures on different measure locations of crest walls. Then,we analyze the relationship between the wave load and the relative wave height,relative wave length and the arc radius. The research results show that the wave loads increase with the increase of the relative wave height and they present the variation trend of firstly increase-then decrease-finally increase with the increase of the relative wave length. For the same wave conditions,the wave loads on the arc crest walls are bigger than those on the vertical crest wall. Among the three arc crest walls,the wave loads decrease with the increase of the arc radius and the maximum occurs on the arc crest wall with the arc radius of 45 cm.

Abstract:The numerical simulation model of win pontoon-twin horizontal plate floating breakwater is established by hydrodynamics simulation software ANSYSWorkbench and AQWA Graphical Supervisor. The investigation of the floating breakwater including the underwater penetration and the spacing of two pontoons and two plates shows that with the increase of the underwater penetration and the spacing of two plates the transmission coefficient decreases. When the relative spacing of two pontoons varies from 0.22 to 0.33,the transmission coefficients turn smaller. The natural period of the twin pontoon-twin horizontal plate floating breakwater is about 4.8～5.3 s. In the design,we should pay attention to avoid producing resonance when the natural period of floating breakwater and the wave period are close. The research will provide a theoretical basis for the breakwater design.

Abstract:This paper presents a general review of main contents and characteristics of all versions of the code for the seismic design of water transport engineering in China,and expounds the design ideas and methods of the code for the seismic design of main port engineering works abroad. Considering the current situation of related codes for the seismic design both in China and abroad,this paper puts forward the prospect for the development of the seismic design for the water transport engineering which is characterized by multi-level earthquake motions and performance-based design in China.

Abstract:The bucket-based breakwater has drawn extensive concern in deep mud soil coastal projects. The stability of a single bucket with bulkheads remains a key technique. This article establishes a centrifugal model test and researches stability issues under wave loads on the basis of Lianyungang breakwater project. Wave loads are applied as quasi-static load and cyclic loads. Test results give stability performance and possible failure modes at different phases and provide the optimal design for coastal projects.

Abstract:Taking a project in Africa for example,we propose a pile supported breakwater structure with wave-proof plate,demonstrate the feasibility of this structure by the calculation using ANSYS finite element method,and analyze the advantages based on the comparison of the engineering quantity.Applying the structure,we solve the problem of the lack of stone materials and seismic liquefaction and cut the cost by nearly 50%.

Abstract:Taking the exceeded deviations of block installation during construction of Angola certain gravity block type quay wall for example,according to the sea-side actual measurement data,and using three stages of gradual processes analysis including static calculation,amended static calculation,and finite element analysis,we analyze the stress of blocks exceeding the install deviation to provide a basis for the reasonable arrangement of the follow-up work,and serve as reference for solving the construction problem and ensure the construction progress as well.

Abstract:Based on the giant concrete silo in Huanghua part phase IV engineering,this paper introduces the structural optimization of the 40 m concrete silo in port.Using flat raft pile foundation,the construction procedure is accelerated.A large size tapered hanging funnel without supporting columns is implemented;The space for the equipment under the silo bottom is spacious,so it is very convenient to install and maintain the equipment;The ultra-light silo filler reduces the weight of the silo;The top ring beam of silo wall is canceled,and the sliding formwork construction is easy and accelerated.Reducing the width and height of the steel structure corridor located at the top of the silo,and the bottom and top integrated chord of the steel truss make the structure safer and more reliable.

Abstract:This paper outlines the layout,main system design parameters,equipment configuration and production efficiency of the bulk grain phase Ⅲ engineering of Rizhao port’s Shijiu harbor area.Based on the practical engineering，it introduces in detail the system,process,production performance and technology innovations of the special intelligent train loading line and the material out of every warehouse by group.Comparing with traditional operation mode,it analyzes the advantage of the above-mentioned innovation system about production efficiency,operation energy consumption and operation cost.Meanwhile,combining with the problems encountered and solutions for the problems in the engineering design,construction and actual operation,it puts forward suggestions on equipment selection,engineering design and technology innovations.

Abstract:The flow condition of upstream or downstream water conservancy hub which locates at the entrance of the approach channel is one of the key factors restricting the navigation capacity.Based on the formation mechanism of the adverse flow pattern and combining with the safety standards of the navigable flowing condition at the entrance zone,we expound the formation causes of the adverse flow pattern and corresponding improvement measures,and put forward prospect for the research on the flow condition at the entrance zone.

Abstract:According to the current situation of river regime and navigation-obstructing properties in the south passage,we analyze the development conditions of the south passage waterway,and discuss the basic idea and framework of further channel regulation.The study result reveals that the river regime of the south passage is relatively stable due to the Yangtze estuary deepwater channel improvement project and reclamation work of Nanhui eastern side flats,therefore it is in a good state of waterway exploiting.But the channel development may be restricted by Jiuduansha wetland national nature reserve zone and safe operation of nearby port and waterway.For the further development of the south passage waterway,we should focus on the estuary integrity,stand on the channel condition,and emphasize the construction opportunity.

Abstract:Protective structures utilized in the river regulation and channel regulation works are generally divided into solid structures and permeable structures.The permeable structures with large porosity can dissipate the flow energy and control erosion effectively,so they are used widely.Taking the tetrahedron-like penetrating frame and vegetation for example,we summarize the research on the behavior of water flow and sediment affected by permeable structures,discuss the limitation of current research,and give some ideas for the future studies.Research findings show that unlike the solid structures,permeable structures dissipate the flow energy mildly,and its resistance characteristic is correlated with the submerged depth and the pore structure,the flow turbulence caused by permeable structures has anisotropic property,and the structures make the mass exchange possible which is conductive to the habitat diversification.

Abstract:The flood peak level ofmountain river changes abruptly and the lasts short.Since the forbidden level stipulated by the maritime sector is generally lower than the national standard,we can decrease the maximum navigable water level of navigation structures to save construction investment.Thus we need to explore the appropriate standard.Analyzing the hydrologic data of 7 hydrometric stations in Sichuan province and 4 hydrometric stations in Chongqing city,we draw the conclusion that it is difficult to control the stage drop adopting the guarantee rate method instead of the frequency method directly,and it is feasible to lower the standard of the flood return period appropriately.

Abstract:To protect the slope,penetrating frames，which have the effect of deceleration and accretion promotion,are laid on the slope surface for bank protection.Carrying out the experiments of bank protection by laying tetrahedron-like penetrating frame and twist double H permeable frame on the bank slope surface,we analyze the effect of bank protection and mechanism of deceleration and accretion promotion and recognize the advantages and disadvantages and the applying position of bank protection by penetrating frames.

Abstract:Most reservoir rapids between two dams of Three-Gorges and Gezhouba are canyon flood rapids.Adopting the conventional rapids regulation methods like enlarging the discharge area to renovate this rapids has many deficiencies,such as producing large quantities,being difficult to achieve better renovation effect and easy to cause localized landslip.Based on Shuitianjiao and Xitan rapids,we analyze the reservoir canyon flood rapids characteristics and limitations of conventional rapids regulation methods.

Abstract:Based on the practical engineering projects,this paper sets up 3D finite element models with ANSYS.Using the numerical simulation analysis,this paper gets the deflections and stress distribution laws under different working conditions of double-hinged ship locks,trying to find the key factors influencing the design of ship lock by analyzing the impact of the floor thickness on the working characteristics of double-hinged lock chamber structure.It is of great importance for guaranteeing the safety and stability,and helpful for choosing the optional structures.

Abstract:To counter the phenomenon of particle aggregation in the process of vacuum preloading treatment in the process of ultra-soft soil,a new type of water absorption,reciprocating water absorption,is put forward to be applied in vacuum preloading reinforcing the ultra-soft soil.With different vacuum degrees of the adjacent vertical drainages (PVD) at the same time,we realize the asynchronous vacuum water absorption of the ultra-soft soil.It is found through the model experiment that the drainage capacity of reciprocating water absorption is 1.1 times of that of regular water absorption.The analysis of mechanism of reciprocating water absorption vacuum reloading method reveals that this method can prevent fine particles from excessive migration and contribute to the consolidation of ultra-soft soil drainage.

Abstract:Because of the complex soil plug effect of open-ended steel pipe pile,the accurate calculation of its vertical bearing capacity is the key to the engineering design.This paper introduces the capacity mechanism,soil plug effect and calculation methods of total vertical bearing capacity,pile tip resistance and pile shaft resistance in some countries and regions.An engineering example is provided to serve as reference for the engineering design.

Abstract:Based on the field test data,we predict the long-term deformation of foundation soils by the hyperbola method.Burgers constitutive model is selected by simplifying the regional stratigraphic boundary.In addition,the creep and primary consolidation settlement are calculated by the finite difference method.The creep settlement of soft soils after construction for 5,10,50,120 years are obtained.Meanwhile,the viscous coefficient and shear modulus of Kelvin and Maxwell model are also achieved.By comparison between the calculated and measured data,the creep settlement of soft soils shouldn’t be ignored during the engineering design and construction.

Abstract:In the engineering,the bored cast-in-situ soldier-pile is often used as the supporting structure of the foundation pit,and the solution program for a foundation pit called Lizheng is commonly used to design the supporting scheme.The supporting row of piles of the double-locks called Wannian can’t be anchored as usual.Therefore,the supporting row of piles is restrained by an L-shaped cap-beam.Besides,the elevation of the button of the foundation pit varies greatly,which results in a more obvious spatial characteristic of the foundation pit.All the above indicate that Lizheng may not give an accurate solution to the supporting scheme.This paper simulates the mutual effect of the structure and soil based on software ABAQUS,and analyzes the calculation result,which may serve as reference for the similar engineering design.

Abstract:For the soft foundation covered with deep miscellaneous fill which is widely distributed in the suburban area,vacuum preloading construction technique is introduced.Adopting three improved construction technology including diversion hole,surrounding site sealing and diaphragm protection,the disturbance caused by deep miscellaneous fill is conquered,and vacuum preloading is implemented smoothly.The monitoring and testing data for the settlement,pore pressure,vane shear test and geotechnical laboratory test reveal that the strengthening effect is remarkable and the vane shear test strength increases by 67%.The construction technique achieves success in the engineering case,thus it may serve as reference for similar projects.

Abstract:The sedimentary environment of the bedrock foundation area is complex,so we should choose suitable drilling technology and equipment,analyze the abnormal phenomena in drilling,and divide reasonably the residual soil and weathered layer;check the site record and compare them with the core samples to ensure accurate layering and naming;pay attention to the application of heavy dynamic penetration test;estimate reasonabily the bearing capacity of the weathered layer and determine the pile foundation design parameters and choose the appropriate estimate calculation method for the bearing capacity of rock-socketed bored piles.

Abstract:Since the gravity wharf structures are becoming larger,common fault exist in various parts,such as cracks in the breast wall,displacement & post-construction settlement,as well as ponding at the rear due to the uneven settlement of the wharf’s surface layer,which affect the normal use of the wharf.Based on the design and construction experience,we probe into the mechanism and harm of the quality faults,and provide countermeasures,which are proved feasible and effective,and thus may serve as reference for similar projects.

Abstract:Investigating typical diseases of the piled wharf and considering the requirement of repair technology under marine environment,6 combinations of repair technology are proposed for the decision-making optimization of the repair technology for the coastal piled wharf.The efficiency values are obtained according to the construction time,cost and guaranteed time to help making decision of the maintenance scheme.Combining the case of one wharf in Huizhou,the maintenance effect and economics of different combinations of repair technology are analyzed to verify the correctness of the maintenance scheme which is made on the basis of efficiency values.

Abstract:To assure the safety and reasonability of double-line ship lock project construction process in Hai’an,we monitor several control indices of sensitive parts and key location of the lock head.The results show that the blocked construction has a greater impact on the constructing block and less on others.Control indices including the structure settlement,soil pressure and structure stress have similar variation tendency.The structure stress fluctuates within a small scope,which satisfies the requirement of the construction code.