土工基础

›› 2013, Vol. 27 ›› Issue (4): 20-22.

• 工程实录 • 上一篇    下一篇

TBM过沟河不良地质洞段施工技术研究

王彦峡,章跃林   

  1. （中水北方勘测设计研究有限责任公司,天津 300222）
  • 收稿日期:2013-03-16 出版日期:2013-08-20 发布日期:2013-08-27
  • 作者简介:王彦峡(1962-),男,工程师，研究方向为国内大型水利水电及调水工程的工程地质、水文地质勘察工作和研究。

TBM Tunneling Under Rivers, Ditches and Other Poor Geological Conditions

WANG Yanxia, ZHANG Yuelin   

  1. （China Water North Investigation,Design & Research Co.,Ltd.,Tianjin,300222）
  • Received:2013-03-16 Online:2013-08-20 Published:2013-08-27

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50 L/s（约180 m3/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。

关键词: TBM, 不良地质条件 , 突涌水（涌泥）, 该注浆封堵

Abstract: 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 surface 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.

Key words: TBM, Poor Geological Conditions, Groundwater (Mud) Intrusion, Drilling and Grouting Reinforcement Techniques