深埋隧道围岩形变压力计算方法研究  

Method for calculating deformation pressure of surrounding rock of deep-buried tunnels

作　　者：王明年[1,2] 王志龙[1,2] 张霄 赵思光[1,2] 刘大刚 童建军 WANG Ming-nian;WANG Zhi-long;ZHANG Xiao;ZHAO Si-guang;LIU Da-gang;TONG Jian-jun(Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotoug University,Chengdu 610031,China;School of Civil Engineering,Southwest Jiaotoug University,Chengdu 610031,China;Department of Civil Engineering,Emei Branch,Southwest Jiaotong University,E’meishan 614202,China)

机构地区：[1]西南交通大学隧道工程教育部重点实验室,四川成都610031 [2]西南交通大学土木工程学院,四川成都610031 [3]西南交通大学峨眉校区土木工程系,四川峨眉山614202

出　　处：《岩土工程学报》2020年第1期81-90,共10页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目（51878567,51878568,51578458）;中国铁路总公司科技研究开发计划课题（2017G007-F,2017G007-H）

摘　　要：通过大量的深埋隧道围岩形变压力现场实测数据,采用数理统计方法,分析了围岩级别、隧道跨度、隧道埋深对围岩形变压力的影响及其变化规律。通过多元非线性回归分析方法,推导建立了竖向形变压力计算公式。通过分析可知,形变压力约为《铁路隧道设计规范》计算荷载的84%~92%,且围岩级别越高两者比值越小。形变压力侧压力系数近似服从正态分布,与《铁路隧道设计规范》中侧压力系数相比,各围岩条件下侧压力系数均有一定的增大。研究成果对我国隧道及地下工程支护结构设计具有一定的参考指导作用。The pressure of surrounding rock is an important research content of tunnel engineering, and it includes deformation pressure. The study on the deformation pressure is of great significance to ensure the safety and economic construction of tunnels and underground engineering. The method of mathematical statistics is used to analyze the influence degrees and variation laws of grade of surrounding rock, tunnel span and tunnel depth on the deformation pressure through a large number of filed measured data. The formula for calculating the vertical deformation pressure is established by using the multivariate nonlinear regression analysis method. The deformation pressure is about 84%~92% times the value by the "Code for design of railway Tunnels" according to the analysis. As the grade of the surrounding rock increases, the ratio decreases continuously. The lateral pressure coefficient of deformation loads obeys the normal distribution. The lateral pressure coefficient of each surrounding rock condition has a certain increase compared with that in the "Code for design of railway tunnels". The research achievements have certain reference guidance for the design of tunnels and underground supporting structures in China.

关 键 词：深埋隧道 现场实测 形变压力 隧道埋深 隧道跨度 围岩级别 

分 类 号：TU456[建筑科学—岩土工程] U25[建筑科学—土工工程]