隧道围岩极限平衡分析及失稳处置  被引量:2

Limit Equilibrium Analysis and Instability Treatment of Surrounding Rock

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作  者:尚玺 袁越 廖孟光[4] 秦坚 苏海波 Shang Xi;Yuan Yue;Liao Mengguang;Qin Jian;Su Haibo(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines,Xiangtan 411201,China;National-Local Joint Engineering Laboratory of Geo-Spatial Informational Technology,Xiangtan 411201,China;Guangzhou Yunzhou Smart City Survey and Design Co.,Ltd.,Guangzhou 511400,China)

机构地区:[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室,湖南湘潭411201 [3]煤矿安全开采技术湖南省重点实验室,湖南湘潭411201 [4]地理空间信息技术国家地方联合工程实验室,湖南湘潭411201 [5]广州云舟智慧城市勘测设计有限公司,广东广州511400

出  处:《矿业工程研究》2020年第4期40-45,共6页Mineral Engineering Research

基  金:湖南省自然科学基金资助项目(2018JJ3166);湖南省自然科学基金资助项目(2020JJ4305)。

摘  要:长沙地铁6号线东湖—韶光段掘进时出现围岩松动、岩土顶层路基失稳冒水、裂隙增大增多等施工问题。运用围岩极限平衡理论,探究了隧道围岩失稳的原因,采用水泥-水玻璃双液注浆法,二等水准测量实时监测等方式对岩土失稳问题进行解决并分析。结果表明:(1)隧道围岩失稳与岩土间摩擦阻力相关,增强摩擦力有助于岩土的稳定,减少失稳现象;(2)采用水泥-水玻璃双液注浆能够加快松散岩土的结合;(3)水准监测在隧道掘进过程中能够准确反映出地表沉降变化,及时反馈双液注浆后岩土结合效果。经过项目实施,有效地解决了岩土失稳问题,保障了隧道的掘进进程和上层道路的行车安全。During the excavation of the section between Donghu Station and Shaoguang Station,Changsha Metro Line 6,there are some construction problems,such as loose surrounding rock,instability and water gushing of rock soil top subgrade,and increase of cracks.Based on the limit equilibrium theory of surrounding rock,this paper explores the causes of instability of tunnel surrounding rock,solves and analyzes the unstable rock and soil problems by using cement water glass double liquid grouting method and real-time monitoring of second-class leveling.Results show that(1)the loose surrounding rock of tunnel excavation is related to the friction resistance between rock and soil,and the enhancement of friction is helpful to the stability of rock and soil by reducing the instability phenomenon;(2)the cement water glass double liquid grouting can accelerate the combination of loose rock and soil,and(3)the level monitoring can reflect the change of surface in the process of tunnel excavation,which can feedback the rock soil bonding effect after double liquid grouting effect.After the implementation of the project,the problem of rock and soil instability is effectively solved,and the driving safety of the tunnel and the upper road is guaranteed.

关 键 词:隧道掘进 岩土失稳 极限平衡分析 注浆 水准测量 

分 类 号:TU452[建筑科学—岩土工程]

 

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