某隧道穿越富水断层破碎带围岩大变形成因分析及稳定性预测  

Deformation Analysis and Stability Prediction of Surrounding Rock of the Tunnel Located in Water-Rich Fault Fracture Zone

作　　者：李永靖 王松 刘维青 文成章 高航 LI Yongjing;WANG Song;LIU Weiqing;WEN Chengzhang;GAO Hang(College of Civil Engineering,Liaoning Technical University,Fuxin,Liaoning 123000,China;China Railway 19th Bureau Group Third Engineering Co.,Ltd.,Shenyang,Liaoning 110136,China)

机构地区：[1]辽宁工程技术大学土木工程学院,辽宁阜新市123000 [2]中铁十九局集团第三工程有限公司,辽宁沈阳110136

出　　处：《矿业研究与开发》2023年第5期84-90,共7页Mining Research and Development

基　　金：国家自然科学基金资助项目(51974146,52174078)。

摘　　要：为保证隧道穿越富水断层破碎带施工安全,在福宜高速阳宗隧道左幅ZK42+845至ZK43+050段围岩大变形成因分析基础之上,采用灰色-尖点突变理论和SSA-ELM智能模型对围岩稳定性现状及发展趋势进行了评价;此外,结合隧道围岩大变形成因有针对性地进行了支护加固,并对加固后的围岩稳定性进行了全面分析。研究结果表明:阳宗隧道研究区段围岩大变形与断层富水、围岩微膨胀性及高地应力密切相关,由突变特征值Δ<0及SSA-ELM模型变形预测综合分析可知,该段围岩具有塌方等安全风险,采用径向注浆、超前注浆支护、加强锁脚及垫脚槽钢、调整变形量等有效措施,控制了穿越富水断层段隧道围岩的变形,使得围岩整体受力更加均衡。工程实践表明,将灰色-尖点突变理论与SSA-ELM模型综合运用可准确有效地评价与预测围岩稳定性。In order to ensure the construction safety of the tunnel located in water-rich fault fracture zone,on the basis of the large deformation analysis of surrounding rock in the ZK42+845 to ZK43+050 section on the left side of the Yangzong tunnel in the Fuyi Expressway,the current stability situation and development trend of surrounding rock were evaluated by using grey-cusp-catastrophe theory and the SSA-ELM intelligent model.In addition,targeted support reinforcement measures were carried out in combination with the causes of the large deformation of surrounding rock of the tunnel,and the stability of the surrounding rock after reinforcement was comprehensively analyzed.The results show that the large deformation of surrounding rock in the Yangzong tunnel research section is closely related to the water-rich fault,micro-expansion of surrounding rock and high ground stress.The development trend of collapse of the surrounding rock in this section can be seen from the characteristic value of energy<O and the comprehensive analysis of SSA-ELM model deformation prediction.Radial grouting,over-grouting support,strengthening locking foot and footing channel,and adjusting the deformation amount can effectively control the deformation trend of the surrounding rock in the tunnel passing through the water-rich fault section,and make the overall force of the surrounding rock more balanced.The engineering practice shows that the comprehensive application of grey-cusp-catastrophe theory and SSA-ELM model can accurately and effectively evaluate the stability prediction of surrounding rock.

关 键 词：隧道工程 稳定性预测 富水断层 灰色-尖点突变理论 SSA-ELM模型 

分 类 号：TD322[矿业工程—矿井建设] U455.91[建筑科学—桥梁与隧道工程]