复杂环境下深基坑围护设计施工方法研究

Research on Design and Construction Method of Deep Foundation Pit Envelope in Complex Environment

结合工程实际,对市中心高压线附近邻近地铁的深基坑围护设计与施工技术进行了研究。通过计算围护结构变形内力并验算基坑的稳定性,采取加固措施使基坑设计满足安全等级要求。分析了地下连续墙围护与土体加固施工的重点,并对土体加固与地下连续墙施工技术展开研究,同时着重分析高压线下地下连续墙钢筋笼吊装及地下连续墙施工重点,顺利解决了高压线附近邻近地铁的深基坑工程设计施工技术难题。

Combined with the engineering practice,the design and construction technology of deep foundation pit support which is near the high-voltage lines in the city center and adjacent to the subway is studied.By calculating the deformation internal force of the support structure and checking the stability of the foundation pit,some reinforcement measures are taken to make the foundation pit design meet the requirements of safety level.The key points of diaphragm wall support and soil reinforcement construction are analyzed,and the soil reinforcement and diaphragm wall construction technology are studied.At the same time,the analysis on the key points of underground diaphragm wall reinforcement cage hoisting and underground continuous wall construction under high-voltage lines are focused on,and the difficulties of the design and construction technology of deep foundation pit support near the high-voltage lines in the city center and adjacent to the subway are smoothly solved.