上海大直径盾构隧道施工引起地表沉降研究  

Study on Surface Subsidence Caused by the Construction of Large Diameter Shield Tunnel in Shanghai

作　　者：黄平[1] 李林[2] 

机构地区：[1]重庆电力高等专科学校,重庆400053 [2]同济大学地下建筑与工程系,上海200092

出　　处：《公路工程》2016年第5期156-160,共5页Highway Engineering

基　　金：国家自然科学基金资助项目(41272288)

摘　　要：上海对于大直径隧道的需求不断增长，如何最大限度降低隧道施工对环境造成的影响已成为研究热点。以外直径为13．95m的迎宾三路隧道为例，采用经验公式计算，并进行现场实测，研究在隧道穿越沉降敏感区和不良地质条件的情况下，由盾构隧道引起的地表变形控制。经验公式和实地观察表明，该区域体积损失应被控制在0．2％以内，可保证地表最大沉降量不超过10mm；除容积损失在0．81％的情况外，沉降槽宽度系数预测值与测量值不具有较好的一致性，当用i=Z0去拟合隧道开挖过程中获得的数据，参数口在0．31～0．37区间，低于中小隧道建议值0．5，研究成果可供相关工程参考。Shanghai rising demand for large diameter tunnel, how to minimize the tunnel construction the effects on the environment has become a hot research topic. Outside diameter of 13.95 m welcome three road tunnel as an example, by empirical formula, and field measurement, research on tunnel subsidence under the condition of sensitive area and bad geological condition, caused by surface deformation control of shield tunnel. Empirical formula and field observations show that the regional volume loss should be controlled within 0.2% , ensures maximum ground settlement is less than 10mm; Besides volume loss in 0.81% of the time, the settlement trough width coefficient of predicted values and measured values are not have good consistency, when I = Z0 to fitting the data obtained from the tunnel excavation process, the parameters within the range of 0.31 to 0. 37, lower than the small and medium-sized tunnel suggest a value of 0.5, research results to provide a reference for the related engineering.

关 键 词：大直径盾构隧道 地面沉降 实地测试 容积损失 槽宽度参数 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]