摘要
莲花山隧道进口边仰坡较陡且偏压,坡面低层为松散堆积土,地质条件复杂,开挖洞口施工中如遇雨水容易发生溜塌,施工运营存在安全隐患,隧道基础下部为灰岩及岩溶;通过锚杆注浆加固,锚索框架措施进行固结加固,采用明洞反压回填及双排抗滑桩加固措施消除偏压影响同时采用双侧壁进洞工艺保证了进洞安全;通过对明洞进行延长、基底采用桩基加固措施、边仰坡采用张口式帘式防护网措施,保证了运营安全。
The upward slope at the entrance of the Lianhuashan Tunnel is relatively steep and biased,and the lower layer of the slope is loose accumulation of soil.The geological conditions are complicated.During the construction of the excavation tunnel,it is easy to slip and collapse in case of rain.There are hidden safely hazards in the construction and operation.The lower part of the tunnel foundation is now gray.Rock and karst;reinforcement by bolt grouting,consolidation and reinforcement by anchor cable frame measures,open tunnel backfilling and double-row anti-slide pile reinforcement measures to eliminate the influence of bias,and double-wall tunneling technology to ensure tunnel entry Safety:The operation safety is ensured by extending the open tunnel,using pile foundation reinforcement measures for the base,and adopting open curtain protection nets for the side slope.
作者
张强
ZHANG Qiang(The First Engineering Co.,Ltd.,of China Railway 16th Bureau Group,Beijing 101300)
出处
《智能建筑与工程机械》
2021年第3期28-30,共3页
Intelligent Building and Construction Machinery
关键词
偏压
残积土
岩溶
反压回填
抗滑桩
锚杆注浆
eccentric pressure
residual soil
karst
backfill with back pressure
anti-slide pile
bolt grouting
