岩石顶管穿越深大断层破碎带摩阻力计算方法研究  

Method for calculating frictional resistance of pipe jacking in rock strata crossing deep and large fault fracture zones

作　　者：钟祖良[1,2] 杜传烨 刘新荣[1,2] 李超[1,3] ZHONG Zu-liang;DU Chuan-ye;LIU Xin-rong;LI Chao(School of Civil Engineering,Chongqing University,Chongqing 400045,China;Key Laboratory of New Technology for Construction of Cities in Mountain Area,Chongqing University,Chongqing 400045,China;College of Civil Engineering,Guizhou University,Guiyang,Guizhou 550025,China)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]贵州大学土木工程学院,贵州贵阳550025

出　　处：《岩土力学》2025年第3期943-954,共12页Rock and Soil Mechanics

基　　金：重庆市自然科学基金面上项目(No.CSTB2022NSCQ-MSX0887);国家自然科学基金青年科学基金项目(No.52208391)。

摘　　要：根据国务院办公厅关于加强饮用水安全保障工作的通知要求,西南山地大城市为实现备用水库-供水组团和供水组团间互联互通时需建设大量的输水隧洞。由于顶管法具有优越的技术和环保优势,在输水隧洞建设时得到广泛的应用。针对岩石顶管穿越断层破碎带时摩阻力计算方法缺乏的问题,依托国务院确定的172项节水供水重大水利工程—重庆观景口水利枢纽工程,通过穿越深大断层破碎带段现场顶力监测与管节周边沉渣调查,揭示了断层破碎带加固前后管节间隙中沉渣填充范围,提出了2种管节-围岩接触力学模型,并基于筒仓理论、围岩弹塑性理论以及多层圆筒模型,推导了2种力学模型对应的顶管摩阻力计算方法。通过现场摩阻力监测与理论计算值对比,验证了岩石顶管穿越断层破碎带摩阻力计算方法的适用性。According to the notice issued by the General Office of the State Council on enhancing drinking water safety guarantees,large mountainous cities in southwestern China need to construct numerous water conveyance tunnels to achieve interconnection between backup reservoirs-water supply clusters and water supply clusters.Due to its superior technological and environmental advantages,pipe jacking has been widely used in the construction of these tunnels.In response to the lack of a calculation method for frictional resistance when pipe jacking traverses fault zones with fractured rock,this research relies on the Guanjingkou water control project in Chongqing,one of the 172 major water conservancy projects for water-saving and water supply determined by the State Council.Through on-site monitoring of jacking forces and investigation of sediment accumulation around the pipe sections in deep and extensive fault zones with fractured rock,the extent of sediment filling in the over-excavated gap before and after reinforcement of the fault zones is revealed.Two mechanical models for the contact between the pipe and the surrounding rock are proposed,and based on Janssen’s theory,the elastic-plastic theory of rock,and the multi-layer cylinder model,corresponding calculation methods for the frictional resistance of pipe jacking are derived for the two mechanical models.The applicability of these friction calculation methods for pipe jacking traversing fault zones with fractured rock is verified by comparing on-site friction monitoring data with theoretical calculation values.

关 键 词：顶管 断层破碎带 筒仓理论 摩阻力 计算方法 

分 类 号：TU456[建筑科学—岩土工程]