论文部分内容阅读
以上海轨道交通11号线穿越桥台桩基为工程背景,通过综合比选确定了套管拔除+水压减摩的桩基拔除方案和“L”型挡墙+搅拌桩加固的挡墙重建方案。运用数值模拟软件对重建过程位移场的变化情况进行了计算复核,计算结果表明:“L”型挡墙结构能较好地抑制河道开挖过程中墙背土体的沉降,且结构自身变位小,能满足工程安全和周边环境保护的要求。研究成果为今后类似工程提供了借鉴和参考。
Taking Shanghai Metro Line 11 crossing the abutment pile as the engineering background, the program of extracting the pile with casing removal + hydraulic anti-friction and the reinforcement of “L” type retaining wall + mixing pile were determined by comprehensive comparison and selection Wall reconstruction program. The numerical simulation software was used to calculate and verify the change of the displacement field in the reconstruction process. The calculation results show that the “L” type retaining wall structure can restrain the settlement of the wall and back of the river during excavation, and the structure itself Small displacement, to meet the engineering safety and environmental protection requirements. The research results provide reference and reference for similar projects in the future.