区域地面沉降对上海地铁隧道长期沉降的影响评估  

Evaluation of the influence of land subsidence on the long-term settlement of metro tunnels in Shanghai

作　　者：吴怀娜[1,2] 顾伟华[3] 沈水龙[1,2] WU Huai-Na;GU Wei-Hua;SHEN Shui-Long(Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;Shanghai Shen tong Subway Group Co., Ltd, Shanghai 200122, China)

机构地区：[1]上海交通大学土木工程系,上海200240 [2]上海交通大学海洋工程国家重点实验室,上海200240 [3]上海申通地铁集团有限公司,上海200122

出　　处：《上海国土资源》2017年第2期9-12,25,共5页Shanghai Land & Resources

基　　金：国家自然科学基金青年基金"考虑剪切错台变形的软土盾构隧道纵向结构计算模型研究"(51508323)

摘　　要：本文将上海地铁隧道监测值与上海地面沉降对比,揭示两者之间相关性及其差异。通过对地铁车站沉降规律的分析,提出了以地铁车站作为隧道深度范围的分层沉降标的分析方法,并采用插值样条曲线拟合隧道沿线下方的地层压缩量,从而确定地面沉降引起的隧道沉降量。基于上述方法对上海地铁一二号线由地面沉降及其它因素引起的地铁沉降量进行区分。结果表明2010年上海地铁一二号线各区间隧道的最大累积沉降量中区域地面沉降的影响占60%左右。This paper presents the correlation and difference between land subsidence and tunnel settlement,based onfield monitoring data.A method to evaluate tunnel settlement caused by land subsidence was proposed.The settlement ofmetro stations was assumed to be caused almost entirely by local land subsidence,and this was verified based on a loadtransfer analysis.Based on this assumption,the proposed method considers the stations as the layer-wise mark at thedepth of tunnel and uses a cubic spline function to fit the line of the station points.The derived curve represents the groundsettlement under tunnels,which is the tunnel settlement caused by land subsidence.With the proposed method,the tunnelsettlement caused by land subsidence in Shanghai Metro Line No.1and No.2was analyzed.The results indicated that thetunnel settlement caused by land subsidence generally accounts for about60%of the maximum settlement for each tunnelsection in2010.

关 键 词：地面沉降 地铁隧道 互相影响 定量评估 

分 类 号：P642.26[天文地球—工程地质学]