大面积基坑开挖工序对邻近供能管沟的影响

Influence of Construction Procedures on Adjacent Energy Supply Pipeline due to Large Foundation Pit Excavation

以虹源盛世国际文化城A1区基坑工程为背景,采用有限元数值模拟的方法,研究了开挖工序对基坑本身及周围环境的影响.结果表明,相同开挖支护条件下,基坑开挖完成后方案1(以岛式开挖为主)和方案2(以盆式开挖为主)的基坑坑底隆起量、格构柱立柱桩竖向位移、支撑围檩格构柱体系应力、地下连续墙侧移和管沟竖向位移的最终数值大小相近但后者略小;相较方案1,方案2施工过程中各工况土方开挖对基坑本身及周围环境影响的急剧变化程度更缓和,因而更偏于安全.

struction A1 found the excav of lattice In this paper, numerical simulation analyses were performed to investigate the influe procedures on foundation pit itself and the surrounding environment based on the bac ation pit of Shanghai Hongyuan Prime International Cultural City. The results show ation is completed, the final values of the amount of excavation pit bottom, vertical di and erect columns, stress of supporting system, lateral displacement of diaphragm wal cal displacement of adjacent energy supply pipeline for the Scheme and Scheme Two （mainly porting are similar, but t changes for the impact of environment during each Scheme Two is safer. using basin excavation） und he latter is slightly smaller. large foundation pit excavati working condition is gentler er the same nce of con- kground of that when splacement 1 and verti- One （mainly using island excavation） conditions for the excavation and sup- In Scheme Two, the degree of the value dramatic on on the foundation pit itself and the surrounding than the value changes in Scheme One, therefore,