极浅埋富水砂层地铁横通道注浆加固与开挖稳定性

doi:10.6040/j.issn.1672-3961.0.2017.040

摘要/Abstract

摘要： 针对极浅埋富水砂层地铁隧道横通道可能出现的施工安全问题,采用室内实验、理论分析及数值模拟的方法,对隧道进行注浆加固试验及开挖工法的优选,提出一套适用于浅埋富水砂层横通道的注浆加固工艺及开挖工法。认为注浆加固可有效提高砂层的物理力学参数和土体力学性能;支护时间越迟,围岩变形越大,预加固可有效提高围岩的物理力学参数,降低围岩变形,改善地层的应力—应变关系;对台阶法与CRD(交叉中隔墙法)法开挖后拱顶沉降、应力及塑性区分布特征进行了对比分析,通过现场开挖监测量控与数值分析的对比,验证了该工艺的可行性,该研究可为类似工程提供一定的借鉴和指导作用。

关键词: 暗挖法, 注浆加固, 开挖稳定性, 极浅埋富水砂层, 数值模拟

Abstract: Against the construction safety of super-shallow buried and water-rich subway transverse channel, laboratory experiments, theoretical analysis and numerical simulation were conducted to select the proper grouting parameter and excavation method, and a series of grouting and excavation method were put forward. Grouting reinforcement could effectively improve the mechanical parameters of sand layer and mechanical properties of soil. The later the support time was, the greater deformation of surrounding rock would be. Pre-reinforcement could effectively improve the physical and mechanical parameters of surrounding rock, reduce the deformation of surrounding rock, and improve the stress-strain relationship. Vault settlement, stress and plastic zone distribution characteristics analysis of excavation step method and CRD(Cross Diaphragm)method were compared, and feasibility of the method was determined. The research results could provide certain references to similar projects.

Key words: undercutting method, super-shallow buried and water-rich sand stratum, numerical simulation, grouting reinforcement, excavation stability

中图分类号:

TD45

夏梦然,李卫,冯啸,朱光轩,李夏. 极浅埋富水砂层地铁横通道注浆加固与开挖稳定性[J]. 山东大学学报(工学版), 2017, 47(2): 47-54.

XIA Mengran, LI Wei, FENG Xiao, ZHU Guangxuan, LI Xia. Grouting reinforcement and excavation stability on super-shallow buried and water-rich sand stratum subway transverse channel[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2017, 47(2): 47-54.

参考文献

[1] 朱泽兵, 刘新荣, 张永兴. 大跨超浅埋轻轨车站隧道开挖方法研究[J]. 岩石力学与工程学报, 2005, 24(2):290-295. ZHU Zebing, LIU Xinrong, ZHANG Yongxing. study of excavation method for ultra-shallow-buried light railway station tunnels with large span[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(2):290-295.
[2] 吉小明,张选兵,白世伟.浅埋暗挖地铁隧道开挖过程的模拟研究[J]. 岩土力学,2002,23(6):828-830. JI Xiaoming, ZHANG Xuanbing, BAI Shiwei. Simulation study of excavation process of shallow embedded tunnel for metro[J]. Rock and Soil Mechanics, 2002, 23(6):828-830.
[3] 王国欣, 肖龙鸽, 王玉岭.城市浅埋超大断面隧道的开挖方法探讨[J]. 隧道建设, 2009, 29(6):658-663. WANG Guoxin, XIAO Longge, WANG Yuling. Discussion on excavation methods of shallow-covered extra-large cross-section urban tunnel[J]. Tunnel Construction, 2009, 29(6):658-663.
[4] 丁燕平.黄土连拱隧道双侧壁导坑法施工关键技术研究[D]. 重庆:重庆交通大学, 2012. DING Yanping. Study on the key technologies of double side heading method in multi-arch loess tunnel[D]. Chongqing: Chongqing Jiaotong University, 2012.
[5] 朱维申, 王平.动态规划原理在洞室群动态施工力学中的应用[J].岩石力学与工程学报, 1992, 11(4):323-331.
[6] 吉小明, 谭文.浅埋暗挖大跨隧道中的施工力学原理与施工技术研究[J]. 隧道建设, 2010, 30(增刊1):94-99. JI Xiaoming, TAN Wen. Study on construction mechanic principles and construction technology of shallow-buried mined tunnels with large span[J]. Tunnel Construction, 2010, 30(Sup.1):94-99.
[7] 张霄,李术才,张庆松,等. 矿井高压裂隙涌水综合治理方法的现场试验[J]. 煤炭学报, 2010,35(8):1314-1318. ZHANG Xiao, LI Shucai, ZHANG Qingsong, et al. Filed test of comprehensive treatment method for high pressure dynamic grouting[J]. Journal of China Coal Society, 2010, 35(8):1314-1318.
[8] 张庆松,韩伟伟,李术才,等. 灰岩角砾岩破碎带涌水综合注浆治理[J]. 岩石力学与工程学报,2012,31(12):2412-2419. ZHANG Qingsong, HAN Weiwei, Li Shucai, et al. Comprehensive grouting treatment for water gushing analysis in limestone breccias fracture zone[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(12): 2412-2419.
[9] 张霄.地下工程动水注浆过程中浆液扩散与封堵机理研究及应用[D].济南:山东大学, 2011. ZHANG Xiao. Study on mechanism of slurry diffusion and sealing at the process of underground engineering moving water grouting and its application[D]. Jinan: Shandong University, 2011.
[10] 李术才,张霄,张庆松,等. 地下工程涌突水注浆止水浆液扩散机制和封堵方法研究[J]. 岩石力学与工程学报,2011(12):2377-2396. LI Shucai, ZHANG Xiao, ZHANG Qingsong, et al. Research on mechanism of grout diffusion of dynamic grouting and plugging method in water inrush of underground engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 2011(12):2377-2396.
[11] 李术才,刘人太,张庆松,等. 基于黏度时变性的水泥-玻璃浆液扩散机制研究[J]. 岩石力学与工程学报,2013,32(12): 2415-2421. LI Shucai, LIU Rentai, ZHANG Qingsong, et al. Research on C-S slurry diffusion mechanism with time-dependent behavior of viscosity[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(12): 2415-2421.
[12] 刘人太. 水泥基速凝浆液地下工程动水注浆扩散封堵机理及应用研究[D]. 济南:山东大学,2012. LIU Rentai. Study on diffusion and plugging mechanism of quick setting cement based slurry in underground dynamic water grouting and its application[D]. Jinan: Shandong University, 2012.
[13] 肖广智. 关于软弱地层中采用浅埋暗挖法修建地铁车站几个问题的探讨[J].世界隧道,2000(6):24-28.
[14] 孙子正,李术才,刘人太, 等.软流塑地层注浆加固作用定量化研究[J].岩石力学与工程学报,2016(S1):3385-3393. SUN Zizheng, LI Shucai, LIU Rentai. Quantitative research on grouting reinforcement of soft fluid-plastic stratum[J]. Chinese Journal of Rock Mechanics and Engineering, 2016(S1):3385-3393.
[15] 赵佃锦,梁庆国,鲁得文, 等.高地应力隧道台阶法施工过程数值模拟[J].地下空间与工程学报,2014(02):441-448. ZHAO Dianjin, LIANG Qingguo, LU Dewen. Numerical simulation on construction process of high ground stress tunnel by bench method[J]. Chinese Journal of Underground Space and Engineering, 2014(02):441-448.
[16] 王洪涛,王琦,王富奇, 等.不同锚固长度下巷道锚杆力学效应分析及应用[J].煤炭学报,2015(03):509-515. WANG Hongtao, WANG Qi, WANG Fuqi. Mechanical effect analysis of bolts in roadway under different anchoring lengths and its application[J]. Journal of China Coal Society, 2015(03):509-515.
[17] 丁常国. 特大跨超浅埋隧道施工技术[J].地下空间,2002, 22(3):214-220.
[18] 王梦恕. 地下工程浅埋暗挖技术通论[M]. 合肥:安徽教育出版社,2004.12.
[19] 张顶立, 王梦恕.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. Construction technique of large-span tunnel under condition of complicated surrounding rocks[J]. Chinese Journal of Rock Mechanics and Engineering, 2003(2):290-296.
[20] 韩煊, 李宁, STANDING J R. Peck公式在我国隧道施工地面变形预测中的适用性分析[J]. 岩土力学, 2007, 28(1):23-28. HAN Xuan, LI Ning, STANDING J R. An adaptability study of Gaussian equation applied to predicting ground settlements induced by tunneling in China[J]. Rock and Soil Mechanics, 2007, 28(1):23-28.
[21] 安永林, 彭立敏. 隧道施工时地表沉降监测控制标准探讨[J]. 岩土力学, 2009, 30(2):446-451. AN Yonglin, PENG Limin. Discussion on settlement standard of ground surface during tunnelling[J]. Rock and Soil Mechanics, 2009, 30(2):446-451.
[22] 唐智伟, 赵成刚, 张顶立. 地下工程抬升注浆设计方法及其抬升效果预测研究[J]. 土木工程学报, 2007, 40(08): 79-84. TANG Zhiwei, ZHAO Chenggang, ZHANG Dingli. Design of displacement grouting and prediction of the effect for construction of underground structures[J]. China Civil Engineering Journal, 2007, 40(08): 79-84.
[23] 唐智伟, 赵成刚. 注浆抬升地层的机制、解析解及数值模拟分析[J]. 岩土力学, 2008, 29(06):1512-1516. TANG Zhiwei, ZHAO Chenggang. Mechanisms of ground heave by grouting and analytical solutions & numerical modeling[J]. Rock and Soil Mechanics, 2008, 29(06):1512-1516.
[24] 李立新, 童无欺, 邹金锋. 注浆抬升位移的随机介质理论预测方法[J]. 铁道科学与工程学报, 2013, 10(5): 47-51. LI Lixin, TONG Wuqi, ZOU Jinfeng. Study on grouting uplift displacement prediction using stochastic medium theory[J]. Journal of Railway Science and Engineering, 2013, 10(5): 47-51.
[25] ZHANG Min, WANG Xinghua, WANG You. Mechanism of grout bulb expansion and its effect on ground uplifting[J]. Journal of Central South University of Technology, 2011, 18(6): 874-880.

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