西安地铁洒北区间大跨隧道围岩变形及支护研究

蔺云宏

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铁道工程学报 ›› 2013, Vol. 30 ›› Issue (9) : 99-104.

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西安地铁洒北区间大跨隧道围岩变形及支护研究

蔺云宏

作者信息 +

Study on Deformation and Supporting of Surrounding Rocks of Sabei Long-span Tunnel of Xi'an Metro

LIN Yun-hong

Author information +

文章历史 +

摘要

研究目的：本文结合西安市地铁1号线洒金桥-北大街区间隧道工程，以地铁矿山法区间施工时控制地层沉降变形、保证安全为目的，利用数值计算软件对未打设锚杆且无注浆加固措施、未打设锚杆采取注浆加固措施、打设锚杆且采取注浆加固措施不同工况的施工过程进行数值分析。同时结合现场监测数据，研究大断面浅埋黄土隧道开挖后围岩的沉降变形规律，并分析隧道开挖工法(CRD工法)及相应支护措施的可行性。

研究结论：通过数值模拟结果与现场监测数据的对比分析，得出：(1)对于浅埋黄土隧道，建议取消拱部锚杆，边墙锚杆可以根据实际需要进行打设；(2)注浆加固地层能够很好地控制隧道开挖过程中引起的地层沉降量；(3)该研究成果可为大断面浅埋黄土隧道等类似工程提供参考。

Abstract

Research purposes: Taking the tunnel project in the section between the Sajinqiao and North Main Street of the Line 1 of Xi an metro as an example, in this paper, the numerical analyses are made for the different construction processes by using the MIDAS GTS numerical simulation software to control the ground settlement and deformation and ensure the construction safety when the mine tunneling method is used for the metro interval construction. These different construction processes include the construction of no use of the anchor and grouting reinforcement, the construction of no use of the anchor but use of the grouting reinforcement and the construction of use of the anchor and grouting reinforcement. Besides, based on the in-site monitored data, in this paper, the study is done on the regulations of the surrounding rocks' settlement and deformation after the excavation of the large cross-sectional shallow loess tunnel and the analysis is made for the feasibilities of the CRD Method and the corresponding supporting measures.

Research conclusions: From the comparison of the numerical simulation results with the in-site monitored data, it is concluded: (1) For the shallow loess tunnel, it is proposed that it is unnecessary to use the arch anchor, and the sidewall anchor should be used according to the actual demand. (2)The grouting reinforcement can effectively control the strata subsidence caused by tunnel excavation for the shallow loess tunnel. (3)This research result can provide the reference the similar projects.

导出引用

蔺云宏. 西安地铁洒北区间大跨隧道围岩变形及支护研究[J]. 铁道工程学报, 2013, 30(9): 99-104

LIN Yun-hong. Study on Deformation and Supporting of Surrounding Rocks of Sabei Long-span Tunnel of Xi'an Metro[J]. Journal of Railway Engineering Society, 2013, 30(9): 99-104

中图分类号： TU45

参考文献

[1]冷希乔, 陈礼伟.大断面黄土隧道变形特征及力学模型分析[J].四川建筑, 2010(1):74-75.

Leng Xiqiao, Chenliwei. The Deformation Characteristics and Mechanical Model Analysis on Large Section of Loess Metro[J]. Sichuan Architecture, 2010(1):74-75.

[2]王明年, 郭军, 罗禄森, 等.高速铁路大断面深埋黄土隧道围岩压力计算方法[J].中国铁道科学,2009(5 ):54-58.

Wang Mingnian, Guo Jun, Luo Lusen, etc. The Surrounfing Rock Pressure Calculation Method on Deep Buried and Large Sectional Lsess Tunnel in High Railway[J]. China Railway Science, 2009(5):54-58.

[3]张顶立, 王梦恕, 高军, 等.复杂围岩条件下大跨隧道修建技术研究[J].岩石力学与工程学报, 2003(2):290-296.

Zhang Dingli, Wang Mengshu, Gao Jun, etc. Construction Technique of Large-span Tunnel under Condition of Complicated Surrounding Rocks[J]. Chinese Journal of Rock Mechanics and Engineering, 2003(2):290-296.

[4]熊良宵, 杨林德. 隧道开挖面接近地质界面时围岩位移特征及其影响因素分析[J].中国铁道科学, 2009(1):62-68.

Xiong Liangxiao, Yang Linde. The Analysis on Displacement Characteristics and Influencing Factors of Surrounding Rock when Tunnel Excavating Towards the Geological Interface[J]. China Railway Science, 2009(1):62-68.

[5]霍润科, 王艳波, 宋战平, 等.黄土隧道初期支护性能分析[J].岩土力学, 2009(增2):287-290.

Huo Runke, Wang Yanbo, Song Zhanping, etc. Analysis of Initial Support Properties for Loess Tunnel[J]. Rock and Soil Mechanics, 2009(supp2):287-290.

[6]乔春生, 管振祥, 腾文彦.饱水黄土隧道变形规律研究[J].岩土力学,2003(24):225-230.

Qiao Chunsheng, Guan Zhenxiang, Teng Wenyan. A Study on Deformation of Tunnel Excavated in Saturated Loess[J]. Rock and Soil Mechanics, 2003(24):225-230.

[7]骆汉宾, 李炜明, 周光辉.武汉地铁盾构施工地表沉降的非等间隔模型分析[J].铁道工程学报, 2011(1):86-90.

Luo Hanbin, Li Weiming, Zhou Guanghui. Analysis of Ground Settlement Caused by Shield Construction of Wuhan Metro with Non-equal Interval Model[J]. Journal of Railway Engineering Society, 2011(1):86-90.