管土刚度对地下管线和地表沉降的影响分析及简易预测方法研究  

Analysis and simple prediction method of impact by pipe-soil stiffness on underground pipeline and surface subsidence

作　　者：张彦斌[1] 杨成永[1] 王凯旋[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中国安全生产科学研究院,北京100012

出　　处：《中国安全生产科学技术》2014年第5期11-16,共6页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(51278044)

摘　　要：在地层沉降计算理论基础上,通过定义新的管土刚度系数,以打靶法为手段,计算分析管线的沉降变形趋势,从管线抵抗地层沉降变形的效果可通过增加隧道埋深来体现这一思想出发,找到该系数与假想隧道埋深的相互对应关系,进而建立一套地下管线沉降和地表沉降的简易预测公式。通过与数值解的对比分析,进一步验证了其准确性和合理性。该公式计算量小、模型简单,应用范围较为广泛,可用于计算考虑管土刚度后,管线沉降变形和管线与地层之间的脱空,也可用于计算考虑管线抵抗地层作用后的地表沉降变形。Based on the calculation theory of ground subsidence , a new pipe-soil stiffness coefficient was defined , and the trends of pipeline settlement and deformation were calculated .From the hypothesis that the effects to resist ground subsidence and deformation of pipeline could be reflected by increasing tunnel depth , the correspondence between this coefficient and the imaginary tunnel depth was found .Thereby , a set of simple prediction formula for underground pipelines subsidence and surface subsidence was established .By contrasting with the arithmetic solu-tion, the accuracy and reasonableness of the formula were verified .The formula can be used to calculate the pipe-line settlement and separation between the pipeline and the layer , and it also can be used to calculate the surface settlement considering the effect of the pipeline to resist the ground layer .

关 键 词：新管土刚度系数 管线沉降 地表沉降 简易预测公式 

分 类 号：X947[环境科学与工程—安全科学]