临近大直径管线深基坑支护变形控制方法研究

Deformation Control Methods of a Deep Excavation Near a Large Diameter Pipeline

随着我国城市化进程的快速发展,城市地下空间的开发利用也进入了快车道,深基坑工程的周边环境也越来越复杂,邻近大直径市政管线的深基坑工程也越来越多。大直径市政管线作为重要的城市基础设施,其保护要求比一般管线要高很多。怎样控制深基坑开挖对邻近大直径管线的影响已经成为很多基坑工程面临的重点问题。以上海市莘庄商务区晨鸣文化广场深基坑工程为案例,研究分析了几种针对性控制措施,并采用数值模拟结合现场监测的方法对几种针对性措施做了分析验证,证明了其有效性,可为今后类似基坑工程的设计、施工提供参考。

With the rapid development of China's urbanization process,the development and utilization of urban underground space has entered the fast lane.The surrounding environment of deep excavation engineering is more and more complex,and there are more and more deep excavation projects near the large diameter municipal pipelines.As an important urban infrastructure,the protection requirements of these large-diameter municipal pipelines are much higher than other conventional utilities.How to control the influence of deep excavation on the adjacent large diameter pipeline has become a key challenge faced by many deep excavation projects.This paper presents a deep excavation project of Chenming Culture Square in Xinzhuang Business District of Shanghai.Several targeted control measures are compared with the numerical simulation results.