考虑隧道反复施工停工时地层变形的时空统一计算方法  

Time-space united calculating method of stratum deformation considering repeated construction and cessation of tunnels

作　　者：施成华[1] 彭立敏[1] 翟旭东[1] 杨伟超[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《岩土工程学报》2009年第6期859-863,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(50308029)

摘　　要：目前,隧道施工地层变形的计算很少考虑变形的时间发展过程,更难以考虑施工过程对变形的影响。基于随机介质理论,从单元开挖引起的地层下沉出发,考虑隧道上部地层变形随隧道施工的时间发展过程,通过理论推导,建立了能考虑隧道反复施工停工的地层变形时空统一计算公式。工程算例分析表明,计算方法具有较好的可靠性。进一步通过工程实例计算,对隧道施工地层变形的时空变化过程进行了研究,隧道长时间停工时,其工作面附近的地层变形会有较大程度的增大,对地表建筑设施不利。Now the time effect is not considered in calculating stratum deformation caused by tunnel excavation, and the tunnel construction course is even more not considered in deformation calculation. Based on the stochastic medium theory and according to the stratum deformation caused by element excavation, the stratum deformation time-space united calculating equation is deduced, and it can take into account the repeated construction and cessation of tunnels. A case of history calculation shows that the calculating method deduced is reliable. Then the time-space rules of stratum deformation caused by repeated construction and cessation of tunnels are discussed. When the tunnel construction stops for long time, the stratum deformation around the tunnel working face will grow to a great extent, which is harmful to the buildings on the ground near the tunnels.

关 键 词：隧道施工 地层变形 随机介质 时空效应 停工 

分 类 号：U478[机械工程—车辆工程]