院报 ›› 2014, Vol. 31 ›› Issue (9): 74-78.DOI: 10.3969/j.issn.1001-5485.2014.09.014

• 岩土工程 • 上一篇    下一篇

某隧道断层带疏水降压设计研究

吴锐,许婷婷,方堃,张腾飞   

  1. 中国地质大学 工程学院,武汉 430074
  • 收稿日期:2013-11-26 修回日期:2014-09-04 出版日期:2014-09-01 发布日期:2014-09-04
  • 作者简介:吴锐(1990-),男,湖北孝感人,硕士,主要从事岩土工程与地质灾害研究工作,(电话)15071462872(电子信箱)728411259@qq.com。

Design of Dewatering and Depressurization Scheme for a Tunnel Fault

WU Rui,XU Ting-ting,FANG Kun,ZHANG Teng-fei   

  1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
  • Received:2013-11-26 Revised:2014-09-04 Online:2014-09-01 Published:2014-09-04

摘要: 以某隧道工程为背景,结合断层F场区工程地质及水文地质条件,通过深孔抽水、压水及水位恢复试验综合确定断层带渗透系数,分析了该断层的水文地质特征。基于此,建立非完整潜水水平坑道位于无限含水体计算模型,对采用3种不同的排水洞布置方式及井点降水这4种方案进行了理论降水计算分析。最后,综合以上方案理论计算结果对比分析得出采用两侧设置排水洞方案能够有效降低水位,达到设计要求;实践也表明降水方案合理可行,可为该地区其他类似隧道排水工程提供参考。

关键词: 隧道工程, 断层带, 疏水降压, 井点叠加法

Abstract: According to the engineering geological and hydrogeological conditions of fault F field of a tunnel project, we analyzed the fault’s hydrogeological characteristics by determining the permeability coefficient through deep pumping, pressure test as well as recovery test. On this basis, we built a nonholonomic computation model of a horizontal underwater gallery which is in infinite water body. Furthermore, we calculated and analysed the dewatering result of four schemes (three different schemes of drainage hole layout and a well-point dewatering scheme). Finally, we compared the theoretical calculation results and concluded that the drainage hole arranged at both sides could effectively reduce the water level and meet the design requirements. Practice verified the feasibility of the dewatering scheme. It provides reference for similar tunnel projects.

Key words: tunneling engineering, fault belt, dewatering and depressurization, well point superposition method

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