Numerical Simulation Of Bulkhead Structure Of Battle And Sheet Pipe Pile Foundation

With the coming of super post-Panamax container ship era, Those key-construction coastal ports, regardless of whether it is newly built,or rebuilt, whose container terminals are being extended up to the water depth of 15 meters above.The Wharf began to develop further to deep-water area far from coast, as a result, the mechanical behavior of bulkhead structure under high reclamation is being paid increasing attention to by engineering and technical personnel. Some Wharf using battle and sheet pipe pile foundation as retaining structure. Densely arranged pipes are used to retaining rear high reclamation. Slant pile, sheet pile, support pile and rigid cap are consolidated to an overall structure to share the soil pressure of rear high reclamation.This kind of bulkhead structure is either the same as high-piled wharf structure, or as the sheet pile wharf structure, and it is also different from the row-piles of foundation pit. The study of battle and sheet pipe pile foundation is still at preliminary stage.At presrent, the proposed method in technical specifications or industry regulations of our country can not completely solve the problem of high reclamation within retaining dike on soft clay and the design and construction of the terminal, in a word,traditional methods and means can not fully meet the engineering problems needs.Hidden dangers often exist,because negative friction caused by the settlement is usually not fully considered in the design of deep-water port bulkhead structure under high reclamation, in addition, the soil exerts force on sheet pile,resulting in a complex bending moment. The interaction between pile and soil structure and stress state is also complex, therefore, The design, construction, maintenance, and promoting of such structure are greatly significant.This article takes battle and sheet pipe pile foundation in some deep-water port as retaining stucture, and simulation analysis of this structure is based on two-dimensional finite difference method.Through comparing the advantages and disadvantages of the theory and numerical methods, the conclution will be get that two-dimensional finite difference method can better reflect the mechanical characteristics of the structure, as a result,numerical simulation is very necessary.The project carried out simulation analysis of finite difference method assuming two-dimensional plane strain.This paper compares pile bending calculated value under moment with measured value, and analyzes oaxial force and soil settlement and get the negative friction. It preliminatily discussed the interaction between pile and soil.Through computing the effection of the altered parameter on the bearing platform's performance, slant pile stiffness change on the cap of the lateral displacement of the largest, followed by the plate pile stiffness changes, and then is cap changes, and finally the sheet pile stiffness and pile spacing between the supporting piles and piles supporting changes.Through changing the soil severeγ,internal friction angleφ, it is analysis of the cap changes in lateral displacement, the impact of severeγ,internal friction angleφare all significant, as the settlement used stone or other materials of local capacity, rugged, light weight,and large internal friction angle.