电力隧道超大直径顶管施工扰动特性研究  

Research on construction disturbance characteristics caused by super large diameter pipe jacking in electric power tunnel

作　　者：丁文其[1,2] 袁森林[1,2,3] 高小庆[4] 谢东武[1,2] 

机构地区：[1]同济大学土木工程学院地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]上海市政工程设计研究总院,上海200092 [4]上海市电力公司电网建设公司,上海200025

出　　处：《岩土力学》2010年第9期2901-2906,共6页Rock and Soil Mechanics

基　　金：国家863计划课题(No.2006AA11Z102);国家自然科学基金(No.50878149);上海市重点学科建设项目(No.B308)资助

摘　　要：由于顶管工程在经济方面的优势以及控制周围环境水平的提升,而得到广泛应用,但目前顶管扰动特性方面的研究多数限于中小顶管,未考虑超大直径顶管的特殊性。对上海世博电力电缆隧道顶管施工进行了现场监测,并主要分析了水-土压力变化曲线,测试结果反映了超大直径顶管顶进5阶段的扰动特性。工程经验表明,超大直径长距离顶进成功的主要作用因素有3个:泥浆套作用、开挖面控制和姿态动态调整。最后对泥浆套在顶管中的形成过程以及扰动作用机制进行了研究,泥浆套在注入、泥膜形成以及整体发挥作用的过程中具备填充、支承、隔阻、润滑等作用。Owing to the economic advantage,the pipe jacking method has been used widely;the control of surrounding environment has also been promoted.But for the disturbance characteristics it is only researching on the medium and small pipe jacking;and it has no considering the particularity of super large diameter pipe jacking.Based on the in-situ monitoring of the Shanghai Expo Cable Tunnel construction,the curves of soil and water pressure are analyzed.The results show the disturbance characteristics for 5 stages during the propulsion.The engineering experiences show that three key parameters of long distance pipe jacking construction are slurry sleeve,stability control of excavation face and position dynamic adjustment.The slurry sleeve forming process and disturbance characteristics are researched;in the process of slurry injecting,slurry membrane forming and the slurry sleeve completion,the functions of the slurry sleeve are filling,supporting,deadening and lubricating,etc.

关 键 词：超大直径顶管 扰动特性 水土压力变化 泥膜 泥浆套机制 

分 类 号：U455[建筑科学—桥梁与隧道工程]