摘要
重庆市轨道交通六号线礼嘉车站为双岛四线车站,单洞最大开挖面积427 m2,两洞之间净岩柱6.5～6.9m宽,是典型大断面小净距隧道,国内同类工程可借鉴施工经验少。施工实践证明,由于采用先加固稳定边仰坡、施作超前大管棚、隧道断面化大为小、从上向下分块施工、对中间岩柱打设预应力对拉锚杆等措施,并辅以监控量测及时反馈指导施工,有效控制了沉降和变形,保证了施工安全。
The Lijia Station of the Chongqing Rail Transit Line 6 is a dual-island four-lane station, with its largest single-tube excavation area being 427 square meters and the net width of rock columns between the two tubes being 6.5-6.9m, so it is a typical large cross-section tunnel with parallel tunnels separated by a thin pillar. Construction practices showed that by utilizing reinforced and stabilized side slopes, big pipe-roofs, a reduction of the tunnel cross-section, up-down partition construction and installation of prestressed anchor bolts in the middle rock column, along with monitoring and taking measurements, subsidence and deformation were effectively controlled, ensuring the safety of the shallow-buried section of the Lijia Station.
出处
《现代隧道技术》
EI
北大核心
2011年第6期146-149,共4页
Modern Tunnelling Technology
关键词
地铁车站
大断面
开挖支护
监控量测
Metro station
Large cross-section
Excavation and support
Monitoring and measurement
