TBM过沟河不良地质洞段施工技术研究  

TBM Tunneling Under Rivers,Ditches and Other Poor Geological Conditions

作　　者：王彦峡[1] 章跃林[1] 

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《土工基础》2013年第4期20-22,26,共4页Soil Engineering and Foundation

摘　　要：某调水工程TBM开挖通过沟河不良地质条件洞段,发生突涌水,瞬时最大流量约50L/s(约180m3/h)。在涌水同时发生涌砂、砾石和黄色泥浆及似"稠状泥石流物的泥砾",导致TBM被困。经研究采用了洞内封堵掌子面、地表布置的勘探孔与围岩加固灌浆等措施相结合的综合封堵加固技术,使得TBM成功通过。该综合加固技术的成功应用,在国内尚属首次,可资类似工程借鉴。A sudden groundwater gushed into a tunnel which was under construction by using Tunnel Boring Machine （TBM） in a large water project. Approximately, the 50 liters/sec or 180 cubic meters/hour groundwater along the ＂thick debris flow material＂ consisting of with the running sand, gravel and yellow clay slurries trapped the TBM. Due to the large groundwater recharge area, the groundwater intrusions would last long time if the hazard was not engineering mitigated. The mitigation measure was a combination of plugging the front surface in the tunnel; drilling the investigation borings from the ground sur- face and the cement grouting of the surrounding rock mass to ensure the tunnel safety. This case history of a successful TBM tunneling technique underneath the ancient river, ditch and other poor geological conditions is one of the first constructions in the similar conditions in China.

关 键 词：TBM 不良地质条件 突涌水(涌泥) 该注浆封堵 

分 类 号：TV672[水利工程—水利水电工程]