岩溶隧道围岩级别修正方法研究

童建军, 桂登斌, 王明年, 李志铵, 吕志洲, 赵大铭

doi:10.3973/j.issn.2096-4498.2021.S1.013

隧道建设 >

2021 , Vol. 41 >Issue S1: 99

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.S1.013

研究与探索

岩溶隧道围岩级别修正方法研究

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（1. 西南交通大学土木工程学院，四川成都 610031；2. 西南交通大学交通隧道工程教育部重点实验室，四川成都 610031)

童建军（1977—），男，四川眉山人，2014年毕业于西南交通大学，桥梁与隧道工程专业，博士，副教授，现从事隧道及地下工程方面的教学与科研工作。E-mail: 414417808@qq.com。*通信作者：桂登斌， E-mail： 837934930@qq.com。

网络出版日期: 2021-08-27

基金资助

国家自然科学基金资助项目(51878567，51878568)

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Modifying Methods for Surrounding Rock Grade of Karst Tunnel

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(1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)

Online published: 2021-08-27

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摘要

针对岩溶隧道围岩分级问题，依据岩溶对围岩岩石坚硬程度Rc、岩石完整程度Kv的衰减规律，提出岩溶隧道围岩岩石坚硬程度衰减值ΔRc及岩石完整程度衰减值ΔKv计算方法，进而得到岩溶发育程度对隧道围岩分级指标修正值ΔBQ溶的计算方法；由计算得到的岩溶发育程度修正指标值ΔBQ溶，结合隧道不同围岩亚级BQ值，提出岩溶隧道围岩定量分级方法，并基于隧道主要地质工程条件得到岩溶隧道围岩亚级定性分级方法。最后，以贵阳市轨道交通3号线一期工程及新建九景衢铁路浙江段沿线4座岩溶隧道对岩溶隧道围岩修正分级方法进行了验证。

关键词： 岩溶隧道; 岩溶发育程度; 围岩分级; 修正系数

本文引用格式

童建军, 桂登斌, 王明年, 李志铵, 吕志洲, 赵大铭 . 岩溶隧道围岩级别修正方法研究[J]. 隧道建设, 2021 , 41(S1) : 99 . DOI: 10.3973/j.issn.2096-4498.2021.S1.013

Abstract

In this paper, the calculation method for karst tunnel surrounding rock hardness attenuation value ΔRc and rock integrity attenuation value ΔKv is proposed based on the attenuation law of surrounding rock hardness Rc and rock integrity Kv, and then the calculation method for karst development degree to the correction value of tunnel surrounding rock classification index BQ karst is obtained. Based on the calculated karst development degree correction index value BQ karst and the BQ value of different surrounding rock subgrades of the tunnel, a quantitative grading method for karst tunnel surrounding rock is proposed; and based on the main geological engineering conditions of the tunnel, the qualitative subgrade qualitative classification method for karst tunnel surrounding rock is obtained. Finally, the method of correction and classification of karst tunnel surrounding rock is verified by case studies on the phase 1 project of Guiyang rail transit line 3 and the newlybuilt 4 karst tunnels along the Zhejiang section on QuzhouJiujiang Railway.

Key words： karst tunnel; development degree of karst; surrounding rock classification; correction factor

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