岩溶富水区深埋水沟排水隧道注浆圈参数研究  

Study of Parameters of Grouting Circle for Deep-ditch Drainage Tunnel in Water-rich Karst Area

作　　者：马青[1] 罗禄森[1] 阳军生[2] 张峥 李林毅 MA Qing;LUO Lusen;YANG Junsheng;ZHANG Zheng;LI Linyi(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,Sichuan,China;School of Civil Engineering,Central South University,Changsha 410075,Hunan,China;Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,Hubei,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031 [2]中南大学土木工程学院,湖南长沙410075 [3]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《隧道建设（中英文）》2018年第11期1793-1799,共7页Tunnel Construction

基　　金：中国中铁股份有限公司科技开发计划重点课题(重点-39-2010)

摘　　要：为合理确定深埋水沟排水方式下隧道注浆圈特征参数,以某岩溶富水区隧道工程为依托,采用FLAC3D软件建立流固耦合计算模型,针对其注浆圈参数进行合理探讨,研究注浆圈厚度、注浆圈渗透性对隧道涌水量、衬砌水压力、结构安全性的影响规律。研究结果表明:增加注浆圈厚度或降低注浆圈渗透性可降低衬砌水压、控制涌水量、保障结构安全,但并不代表实际工程中注浆参数需要追求最值,而应兼顾安全性和经济性,选取相对合理的注浆参数;结合模拟计算结果与同类工程案例,建议依托工程注浆圈厚度以5~6 m、渗透性比值以注浆前的1/50(渗透系数为2×10-6cm/s)为宜,并应结合实际进行技术经济对比,合理确定现场注浆参数。In order to rationally determine the characteristic parameters of tunnel grouting circle under drainage mode of deep ditch,the rationality of the grouting circle parameters of a tunnel in water-rich karst area is discussed by a fluid-solid coupling calculation model based on software FLAC3D,and the influencing laws of thickness and permeability of grouting circle on water gushing volume,water pressure of lining structure and structural safety are studied.The study results show that:(1)The water pressure of lining and the water gushing volume can be reduced,and the structural safety can be guaranteed by rationally increasing the thickness of the grouting circle or reducing the permeability of the grouting circle.(2)According to the simulation results and similar projects,the thickness of grouting circle of 5-6 m and the permeability coefficient of 2×10-6 cm/s are recommended,respectively;and the grouting parameters should be rationally determined according to actual techno-economic comparison results.

关 键 词：隧道 岩溶富水区 深埋水沟 注浆圈参数 注浆圈厚度 注浆圈渗透性 衬砌水压力 流固耦合计算 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]