深埋软岩隧洞围岩变形控制方法  

Surrounding Rock Deformation Control for Deep-Buried Soft-Rock Tunnels

作　　者：张传庆[1,2] 张洋 周辉 杨凡杰[1,2] 刘宁 ZHANG Chuanqing;ZHANG Yang;ZHOU Hui;YANG Fanjie;LIU Ning(State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071;University of Chinese Academy of Sciences, Beijing 100049;Power China Huadong Engineering Corporation Limited, Hangzhou 310041)

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071 [2]中国科学院大学,北京100049 [3]中国电建集团华东勘测设计研究院有限公司,杭州310014

出　　处：《现代隧道技术》2018年第2期28-35,共8页Modern Tunnelling Technology

基　　金：国家自然科学基金资助项目(51279201;51404240);中国科学院科研仪器设备研制项目(YZ201344)

摘　　要：变形控制是软岩隧洞稳定性调控的主要手段,规范和现有文献均给出了变形和变形速率控制指标或方法,但绝大部分成果是依据浅埋隧洞经验总结而得,不能很好地适用深埋隧洞围岩变形压力大的情况,且仅侧重变形收敛判断,无法据此起到施工过程及时调控或者将其作为调控依据的作用。文章针对此问题,在对深埋绿泥石片岩隧洞挤压变形洞段围岩变形特征分析的基础上,建立了多变形指标围岩稳定控制方法,并以变形量和变形速率为主要指标,辅以变形和变形速率模式分析,可考虑施工过程中围岩变形的时空效应,对围岩稳定性进行及时调控,避免了深埋软岩隧洞围岩挤压变形问题的出现。研究成果可为深埋软岩隧洞施工开挖过程中围岩稳定调控提供有效技术手段。Deformation control is a main measure for controlling the stability of soft-rock tunnels. Control indexes and methods for deformation and deformation rate are proposed in relevant specifications and literatures, but most of them focus only on convergence identification and are summarized based on construction experience in shallow tunnels, which makes them less appropriate as a basis of adjustment and control of stability during construction and not very suitable for deep-buried tunnels with high rock deformation pressure. Based on an analysis of the rock mass deformation characteristics of the squeezing section of a deep-buried chlorite schist tunnel, a multi-index rock stabihty control method that considers the indices and modes of deformation and deformation rate is proposed, and timely adjustment measures for rock mass stability are available in light of the time-space effect during con- struction, eliminating squeezing deformation of the surrounding rock in the deep-buried soft rock tunnel.

关 键 词：深埋软岩隧洞 变形控制 变形速率 挤压 时空效应 围岩稳定性 

分 类 号：U451.2[建筑科学—桥梁与隧道工程] TV672.1[交通运输工程—道路与铁道工程]