永莲隧道大型承压含水体探查及处治方法研究
|
摘要
江西永莲隧道施工穿越断层破碎带时多次发生突水突泥灾害,严重影响隧道施工与运营安全。文章通过采用地球物理探测法与超前钻孔探查法确定承压不良地质含水体的空间位置、展布形态以及富水性等,并根据探测结果采取左洞重点涌水钻孔的小偏角原位扫孔注浆、含水体区域的左洞加密钻孔注浆、重点区段的帷幕加固圈加厚处理以及右洞工作洞室钻孔泄水释能并注浆的方法进行左右洞联合处治。注浆效果评价以及实际开挖效果表明,采用左右洞联合处治方法,承压含水体处治效果良好,含水体区域岩体的强度、稳定性及渗透性均得到了较大的提高,隧道顺利安全地通过了F_2断层破碎带。
Water inflow and mud burst occurred frequently in the Yonglian tunnel passing through fault fracture zone,seriously affecting tunnel construction and operation safety.Geophysical prospecting and advanced drilling method were used to determine the spatial location,distribution pattern and water abundance of confined aquifer in unfavorable geology body.Based on the exploration results,relevant treatment measures for left and right tubes were conducted,such as in-situ hole cleaning and grouting of the key drill holes with water inflow in left tube,dense hole drilling and grouting of left tube in aquifer zone,thickening of grout curtain reinforcement circle of key sections,water drain and energy release by hole drilling and then grouting in working chamber of right tube.Evaluation of grouting effect and actual excavation result show that the treatment effect of confined aquifer is fine,the strength,stability and permeability of rock mass in aquifer area are significantly improved and the tunnel successfully passes through F2 fault fracture zone with the above mentioned method.
Water inflow and mud burst occurred frequently in the Yonglian tunnel passing through fault fracture zone,seriously affecting tunnel construction and operation safety.Geophysical prospecting and advanced drilling method were used to determine the spatial location,distribution pattern and water abundance of confined aquifer in unfavorable geology body.Based on the exploration results,relevant treatment measures for left and right tubes were conducted,such as in-situ hole cleaning and grouting of the key drill holes with water inflow in left tube,dense hole drilling and grouting of left tube in aquifer zone,thickening of grout curtain reinforcement circle of key sections,water drain and energy release by hole drilling and then grouting in working chamber of right tube.Evaluation of grouting effect and actual excavation result show that the treatment effect of confined aquifer is fine,the strength,stability and permeability of rock mass in aquifer area are significantly improved and the tunnel successfully passes through F2 fault fracture zone with the above mentioned method.
引文
[1]钱七虎.地下工程建设安全面临的挑战与对策[J].岩石力学与工程报,2012,31(10):1945-1956.QIAN Qihu.Challenges Faced by Underground Projects Construction Safety and Countermeasures[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(10):1945-1956.
[2]翁贤杰.富水断层破碎带隧道突水突泥机理及注浆治理技术研究[D].济南:山东大学,硕士学位论文,2014.WENG Xianjie.Study on Inrush of Water and Mud Mechanism and Grouting Control Technology in Water-rich Fault Fracture Zone of Tunnel[D].Jinan:Shandong University,Master′s Dissertation,2014.
[3]张伟杰.隧道工程富水断层破碎带注浆加固机理与应用研究[D].济南:山东大学,博士学位论文,2014.ZHANG Weijie.Mechanism of Grouting Reinforcement of Water-rich Fault Freactured Zone and Its Application in Tunnel En gineering[D].Jinan:Shangdong University,Doctorial Dissertation,2014.
[4]王德明,张庆松,张霄,等.隧道及地下工程注浆效果模糊评价方法的研究与应用[J].岩石力学与工程报,2017,36(增):3431-3439.WANG Deming,ZHANG Qingsong,ZHANG Xiao,et al.Research and Application on Tunnel and Underground Engineering Grouting Effect of the Fuzzy Evaluation Method[J].Chinese Journal of Rock Mechnics and Engineering,2017,36(S):3431-3439.
[5]薛翊国,李术才,苏茂鑫,等.青岛胶州湾海底隧道涌水断层注浆效果综合检验方法研究[J].岩石力学与工程学报,2011,30(7):1382-1388.XUE Yiguo,LI Shucai,SU Maoxin,et al.Study of Comprehensive Test Method for Grouting Effect of Water Filling Fault in Qingdao Kiaochow Bay Subsea Tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(7):1382-1388.
[6]唐熊俊,范建海,张涛,等.二道垭隧道塌方原因分析与处理技术[J].现代隧道技术,2007,44(4):72-78.TANG Xiongjun,FAN Jianhai,ZHANG Tao,et al.Analysis and Treatment of the Collapse in Erdaoya Tunnel[J].Modern Tunnelling Technology,2007,44(4):72-78.
[7]张鹏,刘学增,米东阳.围岩节理面不利组合条件下隧道塌方的模糊安全评价[J].现代隧道技术,2013,50(2):72-78.ZHANG Peng,LIU Xuezeng,MI Dongyang.Fuzzy Safety Evaluation of a Tunnel Collapse Under an Adverse Combination of Surrounding Rock Joint Surfaces[J].Modern Tunnelling Technology,2013,50(2):72-78.
[8]袁永才,高成路,王旌,等.岩溶隧道突涌水致灾构造与前兆信息判识技术探讨[J].现代隧道技术,2018,55(1):36-44.YUAN Yongcai,GAO Chenglu,WANG Jing,et al.Identification of Geological Structures and Precursory Information Likely to Cause Water Inflow in Karst Tunnels[J].Modern Tunnelling Technology,2018,55(1):36-44.
[2]翁贤杰.富水断层破碎带隧道突水突泥机理及注浆治理技术研究[D].济南:山东大学,硕士学位论文,2014.WENG Xianjie.Study on Inrush of Water and Mud Mechanism and Grouting Control Technology in Water-rich Fault Fracture Zone of Tunnel[D].Jinan:Shandong University,Master′s Dissertation,2014.
[3]张伟杰.隧道工程富水断层破碎带注浆加固机理与应用研究[D].济南:山东大学,博士学位论文,2014.ZHANG Weijie.Mechanism of Grouting Reinforcement of Water-rich Fault Freactured Zone and Its Application in Tunnel En gineering[D].Jinan:Shangdong University,Doctorial Dissertation,2014.
[4]王德明,张庆松,张霄,等.隧道及地下工程注浆效果模糊评价方法的研究与应用[J].岩石力学与工程报,2017,36(增):3431-3439.WANG Deming,ZHANG Qingsong,ZHANG Xiao,et al.Research and Application on Tunnel and Underground Engineering Grouting Effect of the Fuzzy Evaluation Method[J].Chinese Journal of Rock Mechnics and Engineering,2017,36(S):3431-3439.
[5]薛翊国,李术才,苏茂鑫,等.青岛胶州湾海底隧道涌水断层注浆效果综合检验方法研究[J].岩石力学与工程学报,2011,30(7):1382-1388.XUE Yiguo,LI Shucai,SU Maoxin,et al.Study of Comprehensive Test Method for Grouting Effect of Water Filling Fault in Qingdao Kiaochow Bay Subsea Tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(7):1382-1388.
[6]唐熊俊,范建海,张涛,等.二道垭隧道塌方原因分析与处理技术[J].现代隧道技术,2007,44(4):72-78.TANG Xiongjun,FAN Jianhai,ZHANG Tao,et al.Analysis and Treatment of the Collapse in Erdaoya Tunnel[J].Modern Tunnelling Technology,2007,44(4):72-78.
[7]张鹏,刘学增,米东阳.围岩节理面不利组合条件下隧道塌方的模糊安全评价[J].现代隧道技术,2013,50(2):72-78.ZHANG Peng,LIU Xuezeng,MI Dongyang.Fuzzy Safety Evaluation of a Tunnel Collapse Under an Adverse Combination of Surrounding Rock Joint Surfaces[J].Modern Tunnelling Technology,2013,50(2):72-78.
[8]袁永才,高成路,王旌,等.岩溶隧道突涌水致灾构造与前兆信息判识技术探讨[J].现代隧道技术,2018,55(1):36-44.YUAN Yongcai,GAO Chenglu,WANG Jing,et al.Identification of Geological Structures and Precursory Information Likely to Cause Water Inflow in Karst Tunnels[J].Modern Tunnelling Technology,2018,55(1):36-44.