| 礼嘉车站大断面小净距隧道进洞施工技术 |
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| 引用本文： | 徐强.礼嘉车站大断面小净距隧道进洞施工技术[J].现代隧道技术,2011(6):146-149. |
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| 作者姓名： | 徐强 |
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| 作者单位： | 中铁二十四局集团有限公司,上海,200071 |
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| 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,并辅以监拉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.
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| 关 键 词： | 地铁车站 大断面 开挖支护 监控量测 |
Construction Techniques for the Lijia Station Characterized by a Large Cross-Section and Parallel Tunnels Separated by a Thin Pillar |
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| Xu Qiang.Construction Techniques for the Lijia Station Characterized by a Large Cross-Section and Parallel Tunnels Separated by a Thin Pillar[J].Modern Tunnelling Technology,2011(6):146-149. |
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| Authors: | Xu Qiang |
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| Institution: | Xu Qiang(China Railway No.24 Engineering Group Co.,Ltd.,Shanghai 200071) |
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| Abstract: | 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. |
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| Keywords: | Metro station Large cross-section Excavation and support Monitoring and measurement |
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