摘要
松散围岩隧道施工中发生突水涌泥危险性极大,处理不慎容易发生二次事故,造成较大的人员财产损失。以牛拦岗隧道左线Z2K219+077及右线K219+081的突水涌泥段的大变形事故为背景,深入分析了项目施工过程中的各种危险因素以及事故的产生原因,并以此提出了一种洞内拱顶环向一圈帷幕注浆加固围岩,并用临时止浆墙来稳定掌子面的方法来抑制突水涌泥以及拱顶大变形现象。根据现场的实际监控量测数据,验证了该方法能有效抑制隧道施工过程中的拱顶沉降速率,对于处置突水涌泥段的大变形问题有实际的可行性。
During the construction of tunnels with loose surrounding rock,there is a significant risk of water and mud inrush.Careless handling can easily lead to secondary accidents,resulting in significant losses of personnel and property.Based on the large deformation accident of the water and mud inrush section of the left line Z2K219+077 and the right line K219+081 of the Niulangang Tunnel,this study conducts a thorough examination of the diverse risk factors and reasons behind the accident occurred during the project's construction phase,and proposes a method of reinforcing the surrounding rock with a curtain grouting ring of the vault in the cave,and using the temporary grouting wall to stabilize the tunnel face to suppress the water and mud inrush and the large deformation of the vault.Based on the actual monitoring and measurement data collected on-site,it has been confirmed that this approach effectively mitigates the vault settlement rate during tunnel construction,and has practical feasibility for dealing with the large deformation problem of water inrush and mud inrush section.
作者
翁贤杰
陈海兵
张龙生
余俊
WENG Xian-jie;CHEN Hai-bing;ZHANG Long-sheng;YU Jun(Jiangxi Traffic Consulting Company,Nanchang 330008,China;East China University of Technology,Nanchang 330013,China;Jiangxi Vocational and Technical College of Communications,Nanchang 330013,China)
出处
《河北地质大学学报》
2024年第4期64-70,共7页
Journal of Hebei Geo University
基金
国家重点研发计划项目(2022YFB2603002)
江西省交通运输厅科技项目(2023H0021)。
关键词
富水浅埋隧道
突水涌泥
大变形
处置措施
water-rich shallow buried tunnels
water inrush and mud inrush
large deformation
disposal measures
