深厚软土地基深水板桩码头变形控制优化设计

针对软土区采用深层水泥搅拌桩（DCM）加固的板桩码头结构，板桩变形控制是设计难点之一。以深厚软土地基的某深水板桩码头为研究对象，通过PLAXIS软件进行有限元模拟，分析在不同DCM置换率下码头前墙受力与变形的特性，比较DCM及拉杆的不同布置模式下的前墙位移，研究码头后方堆载预压对锚碇墙和土体变形的影响，最终对地基处理工序、DCM置换率及布置范围、拉杆布置进行优化设计。设计方案保证经济合理的同时，较好地限制了板桩的变形，缩短了施工工期，可为类似工程提供借鉴。

Optimal design of deformation control for deep water sheet pile wharf on deep soft soil foundation

For the sheet pile wharf on soft soil whose foundation is treated by deep cement mixing (DCM)，the deformation control of sheet pile is one of the design difficulties.In this paper，a deep-water sheet piled wharf on deep soft soil is researched.Finite element simulation is carried out by PLAXIS software.The internal force and deformation characteristics of the front wall under different replacement ratios of DCM are analyzed，the deformation results of front wall from different layout of DCM and tie rods are compared，and the influence of rear preloading on the deformation of anchor sheet pile and soil is studied.Finally，the foundation treatment procedures，DCM replacement ratio and layout，and tie rod arrangement are optimized and designed.The design scheme can better limit sheet pile deformation and shorten the overall construction period while ensuring the economy of the scheme，which can provide reference for similar projects.