摘要
为研究悬臂式灌注桩在地铁沿线边基坑支护中的适用性,以福州一地铁区间线路旁的基坑工程为例,采用MIDAS/GTS数值计算软件,对各个工况进行模拟,分析总结不同工况下区间结构的变形情况,并在基坑开挖过程中,进行实际的监测。研究结果表明:当场地表层填土厚度较小,开挖过程中主要涉及的土层为坡积粘土、残积粘性土、全风化花岗岩这类工程性质较好的土层时,采用悬臂式灌注桩,可以达到地铁对变形的要求,同时满足基坑支护需求。
In order to study the applicability of cantilever filling pile in the foundation pit support along the subway,basing on a foundation pit project beside a subway line in Fuzhou this paper dapted MIDAS/GTS numerical calculation software to simulate different working conditions,analyzed and summarized the deformation of the section structure under different working conditions while the actual monitoring was carried out in the process of foundation pit excavation.The results showed that When the thickness of the in-situ surface filling soil was small and the main soil layers in the excavation process included slope soil,residual soil and weathered granite,which had good engineering properties,,the cantilever filling pile was used as the foundation pit supporting method can meet the deformation requirement of subway and the requirement of foundation pit supporting.The type of foundation pit supporting structure avoided the economic waste caused by the strong supporting structure design.At the same time,because no internal support is used,the duration of excavation can be reduced effectively.
作者
杨松华
YANG Songhua(Fuzhou Architectural Design Institute Co.,Ltd.,Fuzhou 350109)
出处
《福建建筑》
2023年第4期75-79,共5页
Fujian Architecture & Construction
关键词
基坑
地铁区间
监测
数值模拟
有限元计算
Excavation
Subway section
Monitoring
Numerical simulation
Finite element calculation
