摘要
基坑施工对邻近建筑物的影响一直是研究的热点问题,而盾构隧道结构对变形更为敏感,开挖施工对既有隧道的变形影响问题值得重点关注。选取杭州地区17个既有地铁盾构隧道的基坑工程实例,研究开挖施工对隧道结构的变形影响,分析基坑与隧道的水平净距、相对高差、开挖深度等空间参数对隧道变形的影响。研究结果表明:基坑开挖的卸荷作用会引起邻近隧道结构的附加变形,且水平位移通常大于竖向位移;隧道的变形影响随着与基坑的水平净距增大而呈非线性递减;隧道的竖向位移随基坑开挖深度增加而线性增大,且不同开挖深度的敏感性不同。研究成果对类似地区的地铁隧道保护工作具有一定的参考意义。
The influence of the deep excavation on adjacent structures has always been a hot button issue.The shielded tunnel structure is sensitive to the deformation.The influence of excavation on the deformation of the existing tunnel deserves special attention.Seventeen existing subway shielded tunnels in Hangzhou area are selected as examples to study the influence of excavation on the deformation of the tunnel structure,and to analyze the influence of spatial parameters such as the horizontal net distance,the relative height difference and the excavation depth between the excavated area and the tunnel.The results show that the unloading of the deep excavation will cause the additional deformation of the adjacent tunnel structure,and the horizontal displacement is usually larger than the vertical settlement.The influence of the tunnel deformation decreases non-linearly with the increase of the horizontal net distance from the excavated area.The settlement of tunnel increases linearly with the increase of excavation depth,and the sensitivity of different excavation depth is different.
作者
菅若涵
黄睿
许铖啸
JIAN Ruohan;HUANG Rui;XU Chengxiao(School of Civil Engineering,Shaoxing University,Shaoxing 312000;Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province,Shaoxing 312000)
出处
《土工基础》
2023年第6期982-986,共5页
Soil Engineering and Foundation
基金
国家自然科学基金(51708354)。
关键词
基坑
盾构隧道
位移变形
统计分析
Deep Excavation
Shielded Tunneling
Displacement and Deformation
Statistical Analysis
