深埋特长公路隧道高地应力区岩爆倾向判别研究  

Study on Discrimination of Rock Burst Tendency in High Ground Stress Area of Deep-buried and Extra-long Highway Tunnel

作　　者：李智 陈探 江树林 赵海斌 唐宇[2] LI Zhi;CHEN Tan;JIANG Shu-lin;ZHAO Hai-bin;TANG Yu(Road&Bridge Southern China Engineering Co.,Ltd.;School of Resources and Safety Engineering,Central South University)

机构地区：[1]中交路桥华南工程有限公司 [2]中南大学资源与安全工程学院

出　　处：《中国标准化》2022年第16期198-201,共4页China Standardization

基　　金：湖南省自然科学基金资助项目“隔水层劣化过程探测与突水灾害控制研究”(项目编号:06JJ3030);中交路桥建设有限公司科技研发项目资助项目“变质砂岩特长隧道高地应力条件下施工技术研究”资助。

摘　　要：为了对公路隧道穿越高地应力区的岩爆灾害进行防控,保障隧道施工安全,本文依托德州至上饶高速公路池祁段某特长隧道,通过现场取样开展了变质砂岩的岩石力学实验研究,并在现场进行了地应力测试。在获取岩石单轴抗压强度和地应力场的基础上,建立了岩爆倾向判别模型。研究结果表明:依托隧道工程在740 m深埋处为高地应力区,最大主应力为自重应力;通过公路隧道设计规范和应力比判别模型,可推断该隧道深埋段岩爆灾害等级较低。在穿越高地应力区施工中,提前获取岩石力学性能及应力场对于岩爆灾害预测及防控效果显著。In order to prevent and control the rock burst disaster of highway tunnel crossing the high stress area and ensure the safety of tunnel construction.In this paper,based on a super-long tunnel in Chizhou-Qimen section of DezhouShangrao expressway,the rock mechanics experiment of metamorphic sandstone is carried out through field sampling,and the in-situ stress test is carried out in the field.Based on the uniaxial compressive strength and in-situ stress field of rock,the discrimination model of rock burst tendency is established.The results show that the tunnel project is a high ground stress area at the depth of 740 m,and the maximum principal stress is self-weight stress;Through the design code of highway tunnel and the discrimination model of stress ratio,it can be inferred that the rock burst disaster grade of the deep buried section of the tunnel is low.In the construction of crossing the high stress area,obtaining the rock mechanical properties and stress field in advance has a significant effect on the prediction and prevention and control of rock burst disaster.

关 键 词：特长隧道 高地应力 岩爆预测 变质砂岩 

分 类 号：U452.11[建筑科学—桥梁与隧道工程]