隧道开挖引起管线沉降计算的刚度修正法  

A Modified Stiffness Approach to Predict Tunnelling-Induced Deformation and Force of Pipelines

作　　者：韩煊[1] 雷崇红[2] 张鹏[1] 

机构地区：[1]北京市勘察设计研究院有限公司院士大师工作室,北京100038 [2]北京市轨道交通建设管理有限公司,北京100037

出　　处：《土木建筑与环境工程》2012年第3期21-27,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：北京市优秀人才培养资助项目(2008F-13);北京市科技计划项目(Y0605010040821)

摘　　要：在城市地铁隧道掘进中,地层位移会对密布的城市地下管线形成较大的威胁。由于管土隧道相互作用问题的复杂性,除了数值分析方法以外,一般在工程实践中均忽略了结构刚度对其变形的影响作用,因此结构变形预测结果大大偏于保守。在理论分析的基础上,通过机理研究和实测数据的分析,提出了管线变形及其内力计算的高斯分布模型与结构刚度影响机理;给出了管线沉降槽宽度系数K和管线刚度之间的经验关系,建立了考虑隧道管土相互作用的管线沉降和内力的预测方法——刚度修正法。The urban tunnel construction will cause ground movement and the deformation or even damage of the nearby pipelines. It＇s very common in practice that the structural stiffness is ignored in the settlement prediction and damage assessment because of the complexity of tunnel-soil-pipeline interaction. Based on the study of pipeline settlement profiles measured from several tunnelling projects, an observation is put forward that the settlement profiles of the pipeline can be fit very well by the Gaussian equation in case of using a larger trough-width parameter K influenced by the stiffness of the pipeline. Thus an empirical relationship between the parameter K and the stiffness of the pipeline was proposed which can be used to predict the trough parameter according to the stiffness, and a ＇Modified Stiffness Method＇ was proposed.

关 键 词：管线 隧道掘进 地层位移 管土相互作用 变形 内力 刚度 风险评估 

分 类 号：TU279.76[建筑科学—建筑设计及理论]