重力式码头升级改造板桩墙后土压力分布

针对重力式码头升级改造新建板桩墙方案板桩墙后土压力分布问题，开展新建板桩墙距已有重力式墙身不同距离的土压力分布规律研究。采用有限元数值模拟和理论公式计算对比分析，得出作用在前板桩墙上的土压力小于理论主动土压力，即存在贮仓效应的结论。建议重力式码头改造工程设置前板桩墙时，采用公式合理选取贮仓尺寸，或根据新建板桩墙距已有码头墙身的距离采用有限元计算作用在板桩墙上的土压力，避免保守或激进设计。

Soil pressure distribution behind newly built sheet pile wall in upgrading and renovation of gravity wharf

In response to the problem of soil pressure distribution behind the newly built sheet pile wall in the upgrading and renovation of gravity walls，the paper studies the distribution law of soil pressure at different distances between the newly built sheet pile wall and the existing gravity wall.Finite element numerical simulation and theoretical formula calculation are used to compare and analyze the distribution of soil pressure.It is concluded that the soil pressure acting on the front sheet pile wall is less than the theoretical active soil pressure，indicating there is a silo effect.It is suggested that when the front sheet pile wall is installed in the gravity wharf reconstruction project，the size of the silo should be rationally selected by the formula，or the soil pressure exerted on the sheet pile wall should be calculated by the finite element method according to the distance between the newly built sheet pile wall and the existing wharf wall，to avoid conservative or radical design.