摘要
杧洲隧道项目地处横琴粤澳深度合作区和珠海洪湾片区,地质条件较差,淤泥层总厚度达30 m。以隧道工程北岸工作井为研究对象,通过有限元建模,模拟基坑开挖在各个工况下的变形情况。根据模拟结果,发现随着开挖深度的增大,基坑在各个方向的变形亦随之增大,且基坑最大变形出现在当前开挖处;第1、2步开挖基坑整体变形较小,而第3、4、5、6步开挖基坑变形增速较快,且变形最大值出现在基坑开挖至底部。
Mangzhou tunnel project is located in Hengqin Guangdong Macao deep cooperation zone and Zhuhai Hongwan area,with poor geological conditions,and the total thickness of the silt layer is 30 m.Takes the working well on the north bank of the Mangzhou tun‐nel project as the research object,simulates the deformation of foundation pit excavation under various working conditions through finite ele‐ment modeling.According to the simulation results,it is found that with the increase of the excavation depth,the deformation of the foun‐dation pit in all directions also increases,and the maximum deformation of the foundation pit occurs at the current excavation;the overall deformation of the excavation in the first and second steps.However,the deformation growth rate of the excavation foundation pit in steps 3,4,5,and 6 is faster,and the maximum deformation occurs when the foundation pit is excavated to the bottom.
作者
李遵豪
张高海
陈俊伟
何钦
LI Zunhao;ZHANG Gaohai;CHEN Junwei;HE Qin(Zhuhai Dahengqin City New Center Development Co.,Ltd.Zhuhai 519030,China;China Railway Construction Investment Group Co.,Ltd.Beijing 100855,China;China Railway Siyuan Survey and Design Group Co.,Ltd.Wuhan 430061,China;Guangdong Provincial Academy of Building Research Group Co.,Ltd.Guangzhou 510500,China)
出处
《广东土木与建筑》
2022年第7期37-39,共3页
Guangdong Architecture Civil Engineering
关键词
基坑开挖
盾构工作井
数值模拟
变形
foundation pit excavation
shield tunneling well
numerical simulation
deformation
