摘要
断层破碎带是隧道工程建设过程中常见的不良地质现象,常导致突涌水以及塌方等灾害,是隧道建设的重点控制对象。依托五指山隧道工程进行基于生态保护的断层破碎带隧道注浆堵水技术研究,结果表明:(1)从生态保护的角度出发,针对超前预注浆和后注浆方案分别提出了一定期限内恢复地下水位的限排量计算方法。对于五指山隧道,超前预注浆和后注浆方案对应的一年内恢复地下水位的限排量分别为1.82 m3/(d·m)和0.96 m3/(d·m);(2)结合地下水限排量和围岩注浆后的排水量,提出了围岩注浆圈厚度计算方法。五指山隧道超前预注浆和后注浆方案一年内恢复地下水位对应的注浆圈厚度分别为2.07 m和4.5 m。
A fault fracture zone is one of the common adverse geological phenomena encountered in tunnel projects,which often results in water inflows,collapses and other disasters.So it is a key risk to be controlled during the construction of tunnels.Taking Wuzhishan Tunnel project as a study case,this paper conducted a research in the grouting and sealing technology for tunnels in the fault fracture zone based on ecological protection.The study results showed that(1)from the perspective of ecological protection,the calculation methods for limited drainage volume to recover the water table in a given period of time were put forward respectively for pre-grouting and post-grouting schemes.In terms of Wuzhishan Tunnel project,the limited drainage volumes to recover the water table in one year was 1.82m3/(d·m)and 0.96 m3/(d·m)respectively for pre-grouting and post-grouting schemes;(2)combined with the limited drainage volume of groundwater and the drainage volume after grounting for surrounding rock,a method was proposed to calculate the grouting ring thickness of surrounding rock.In the pre-grouting and post-grouting schemes of Wuzhishan Tunnel,the grouting ring thickness corresponding to the recovery of water table in one year was 2.07 m and 4.5 m,respectively.
作者
张德文
苏定武
ZHANG Dewen;SU Dingwu(Hainan Provincial Transportation Engineering Construction Bureau,Haikou 570208)
出处
《现代隧道技术》
CSCD
北大核心
2022年第3期46-52,共7页
Modern Tunnelling Technology
基金
海南省交通科技项目(J-ZX-ZAK-02-2019).
关键词
隧道工程
断层破碎带
注浆堵水
限排量
注浆圈厚度
Tunnel projects
Fault fracture zone
Grouting and sealing
Limited drainage volume
Grouting ring thickness
