地铁隧道开挖下刚性接口管线安全控制研究  

Research on safety control of rigid interface pipelines under subway tunnel excavation

作　　者：王雨 王凯旋[2] WANG Yu;WANG Kaixuan(Department of Geotechnical Engineering,China Institute of Water Resources and Hydropower Research,Beijing 100048,China;Department of Technological Development,China Academy of Safety Science and Technology,Beijing 100012,China)

机构地区：[1]中国水利水电科学研究院岩土工程研究所,北京100048 [2]中国安全生产科学研究院技术开发部,北京100012

出　　处：《中国安全科学学报》2021年第8期97-103,共7页China Safety Science Journal

基　　金：中国安全生产科学研究院基本科研业务费专项资金资助(2018JBKY05,2021JBKY11)。

摘　　要：为减少邻近开挖地铁隧道可能造成管线渗漏及破损,基于土体开挖变形、管-土相对刚度以及材料强度准则,分别针对单线隧道和双线隧道,通过解析推导建立适用于任意管-隧位置关系的刚性接口管线允许最大沉降取值方法,并提出不同材质管线沉降控制的设计图表。结果表明:大尺寸管线的沉降安全控制标准相对更严格,考虑沉降控制的管线风险源等级排序为钢筋混凝土管线>离心铸铁管线>钢管线>球墨铸铁管线;考虑管-土相对刚度修正的管线沉降安全控制标准更为合理;管-隧垂直且管-土相对刚度较小时管线沉降安全控制标准需更为严格,应给予重点关注。In order to reduce possible pipeline leakage and damage caused by excavation of adjacent metro tunnels,based on soil excavation deformation,pipe-soil relative stiffness and material strength criterion,a method of allowable maximum settlement for rigid interface pipelines was established through analytical derivation for single-track tunnels and double-track ones respectively. Then,design charts of settlement control for pipelines of different materials were proposed. The results show that control standards of large-scale pipelines is relatively stricter,and the order of pipeline risk sources considering settlement control is like reinforced concrete pipeline > centrifugal cast iron pipeline > steel pipeline > nodular cast iron pipeline. Moreover,the modified standards with consideration to pipe-soil relative stiffness is more reasonable,and when pipe-tunnel is vertical and relative stiffness is small,standards will be stricter,which should be paid close attention to.

关 键 词：地铁隧道开挖 刚性接口管线 安全控制 管-土相对刚度 允许沉降 

分 类 号：X948[环境科学与工程—安全科学]