摘要
围岩稳定性问题是山岭综合管廊勘察设计及施工中的重要问题。以冬奥会综合管廊DK6+180断面为背景,利用反演得出的围岩变形模量进行围岩稳定性分析。研究结果表明:随着折减系数的增加,围岩强度参数逐渐减小,拱顶沉降和净空收敛都逐渐增大,围岩塑性区范围也线性增加;折减系数达到3.5时,塑性区已经贯通到地表,此时围岩拱顶沉降和净空收敛都无限大,说明围岩已经达到极限稳定状态;综合围岩塑性区分布和围岩变形计算分析结果,判定此断面围岩稳定安全系数为3.5.研究成果对于类似山岭综合管廊围岩稳定性分析具有借鉴和参考价值。
The stability of surrounding rock is an important concern in the investigation,design,and construction of mountain integrated pipe gallery.On the basis of the DK6+180 section of the Winter Olympics Integrated Pipe Gallery,the stability of surrounding rock was analyzed by using the deformation modulus of surrounding rock obtained by inversion.The results show that with the increase of reduction factor,the strength parameters of surrounding rock decrease gradually,the vault settlement and clearance convergence increase gradually,and the plastic zone range of surrounding rock increases linearly.When the reduction factor reaches 3.5,the plastic zone has penetrated to the surface.At this time,the vault settlement and clearance convergence of surrounding rock are infinite,indicating that the surrounding rock has reached the limit stable state.On the basis of the plastic zone distribution of surrounding rock and the calculation and analysis results of surrounding rock deformation,the stability safety factor of surrounding rock in this section is determined to be 3.5.The research results have reference value for the stability analysis of surrounding rock of similar mountain integrated pipe gallery.
作者
袁鸿鹄
谢文杰
李宏恩
YUAN Honghu;XIE Wenjie;LI Hongen(Beijing Institute of Water, Beijing 100048, China;Beijing Water Science & Technology Institute, Beijing 100048, China;Nanjing Hydraulic Research Institute, Nanjing 210029, China)
出处
《太原理工大学学报》
CAS
北大核心
2022年第1期156-161,共6页
Journal of Taiyuan University of Technology
基金
国家重点工程:2022年冬奥会延庆赛区外围配套综合管廊工程
北京市水务局五个人人才计划项目。
关键词
冬奥会
综合管廊
山岭
围岩稳定
塑性区
2022 OLYMPIC winter games
Integrated Pipe Gallery
mountain
stability of surrounding rock
plastic zone
