摘要
以太原地铁2号线中心街站—南中环街站区间为例,基于复变函数的映射变换得到地表沉降解析式,运用流固耦合原理分析盾构开挖地下水位埋深与地表沉降的关系,得到以下结论:在流固耦合的模式下,地下水位埋深越小,地表沉降值、最大主应力越大以及塑性区的范围也越大且塑性区未延伸至地表;利用Matlab得到地下水位埋深与最大地表沉降值的拟合公式;当地下水位埋深<5.42m时,盾构施工引起的地表沉降值超过规范允许最大地表沉降值,需采取防、降水等措施。
Taking the interval of Taiyuan Metro line No. 2 Center Street station to South Central Street station for example,the surface subsidence formula is gotten based on mapping transformation of complex function. Based on the fluid solid coupling principle,the relationship of groundwater level depth and surface subsidence during shielding is analyzed,and the following conclusions are gotten,namely in the fluid solid coupling model,the smaller the groundwater level depth,the greater the surface subsidence,the maximum principal stress and the plastic zone scope,and the plastic zone does not extend to the surface. By Matlab software,the fitting formula of groundwater level depth and the maximum surface subsidence is gotten. When the groundwater level depth is less than 5. 42 m,the surface subsidence induced by shielding exceeds he maximum allowed standard value, it needs to take measures for prevention and dewatering.
作者
鲍飞翔
杨双锁
杨欢欢
糜瑞杰
郝瑞卿
牛少卿
BAO Feixiang, YANG Shuangsuo, YANG Huanhuan, MI Ruijie, HAO Ruiqing, NIU Shaoqing(College of Mining Engineering, Taiyuan University of Technology , Taiyuan , Shanxi 030024, Chin)
出处
《施工技术》
CAS
2018年第9期70-74,共5页
Construction Technology
基金
国家自然科学基金项目(51274145)
关键词
盾构
施工
流固耦合
地下水位
地表沉降
相关性
shielding
construction
fluid solid coupling
groundwater level
surface subsidence
relativity
