分离卸荷式板桩码头土压力计算方法

Study on the Computation Method of Earth Pressures of the Sheet Pile Wharf with Separated Relieving Platform

分离卸荷式板桩码头在传统板桩码头后方增设桩基卸荷承台,从而有效地改善了前墙受力变形特性。针对分离卸荷式板桩码头的特点和土体的具体情况,利用极限平衡理论、微元分析法等建立分离卸荷式板桩码头前墙土压力、前排桩桩后土压力以及后排桩桩后土压力的计算公式。以某港区10万t级分离卸荷式板桩码头为例,建立有限元模型,将土压力公式结果与数值模拟结果进行对比分析。结果表明两者吻合度较高,提出的土压力计算公式可用,并可为类似工程设计和结构计算提供一定参考。

Sheet pile wharf with separated relieving platform adds a relieving platform supported by piles behind the traditional sheet pile wall. The relieving platform can improve the stress and deformation properties of the sheet pile wall. For this feature and the specified circumstance of soil,this paper uses the limit equilibrium theory,micro-element analysis method and etc. to establish the suitable calculation methods of its three main regions＇earth pressures. Taking a lO-ton sheet pile wharf with separated relieving platform as an example, then establish a finite element model. Finding that FEM results and the formula results have high degree of aligment,so the formula can be used in the sheet pile wharf with separated relieving platform,and it can provide a reference for similar engineering design and structural calculations.