高黎贡山隧道1

收稿日期:2018-08-10;修回日期:2018-12-21

第一作者简介:高广义(1984 ),男,甘肃环县人,2007年毕业于兰州交通大学,建筑环境与设备工程专业,本科,高级工程师,现从事隧道施工及科研工作㊂E-mail:ggy031@㊂

高黎贡山隧道1#竖井(副井)突水淹井封堵施工技术

高广义1,司景钊2,贾建波2

,张㊀俊2

(1.中铁隧道勘察设计研究院有限公司,广东广州㊀510000;2.中铁隧道局集团有限公司,广东广州㊀511458)

摘要:为解决高黎贡山隧道1#竖井(副井)掘砌时发生的高压突水淹井难题,根据地层特点和施工情况,分析突涌水原因;类比其

他行业深井淹井突水口封堵施工经验,提出水下混凝土直接封堵㊁静水压抛碴注浆封堵和改性水泥浆止水垫与注浆碎石堵水层相结合封堵3种方案并进行比选,选用在静水压状态下采用改性水泥浆止水垫与注浆碎石堵水层相结合封堵的方案,介绍其施工控制技术,并通过抽排水施工对封堵效果进行验证㊂结果表明:1)改性水泥浆止水垫与注浆碎石堵水层相结合封堵方案中采取的改

性水泥止浆垫参数设计㊁构筑止浆垫施工工艺㊁改性水泥浆的配比等施工技术能够满足深大竖井突水口封堵施工要求;2)深水承

压摄像头能够对施工过程进行有效监控,实施控制性排水能够准确检验封堵效果;3)50m 厚改性水泥浆止水层能够达到封堵突水

口的预期目的,完成后经抽水验证可知突水口封水率达99%,封堵效果较好㊂关键词:铁路隧道;突水淹井;改性水泥浆;水下止水垫层;过程控制DOI :10.3973/j.issn.2096-4498.2019.02.013

文章编号:2096-4498(2019)02-0275-06

中图分类号:U 457+.2㊀㊀㊀㊀㊀文献标志码:B

开放科学(资源服务)标识码(OSID ):

Sealing Technology for Water Inrush of Vertical Shaft No.1

(Auxiliary Shaft )of Gaoligongshan Tunnel

GAO Guangyi 1,SI Jingzhao 2,JIA Jianbo 2,ZHANG Jun 2

(1.China Railway Tunnel Consultants Co.,Ltd.,Guangzhou 510000,Guangdong ,China ;

2.China Railway Tunnel Group Co.,Ltd.,Guangzhou 511458,Guangdong ,China )

Abstract :High pressure water inrush occurred to shaft No.1(auxiliary shaft)construction of Gaoligongshan Tunnel

and the shaft was flooded.In this paper,the causes for the water inrush are analyzed based on strata characteristics and

construction situation;and then 3sealing schemes,i.e.underwater concrete sealing,grouting under hydrostatic

pressure and combined sealing of modified cement slurry waterstop layer and grouting stone sealing layer,are proposed

by comparing with shaft sealing experience of relevant industry;finally,the construction control technology is introduced,and the sealing effect is verified by pumping and drainage construction.The treatment results show that:(1)The sealing scheme that combined modified cement slurry waterstop layer and grouting stone sealing layer is

selected;and the parameter design of modified cement slurry waterstop layer,the slurry waterstop layer construction

technology and the cement slurry mixing proportion of the selected scheme can meet the sealing requirement of water

inrush in deep and large vertical shaft.(2)The deepwater pressure camera can monitor the construction process effectively,and the sealing effect can be checked accurately by controlled water drainage.(3)The sealing effect of modified cement slurry waterstop layer with thickness of 50m is good,reaching 99%sealing rate.

Keywords :railway tunnel;water inrush and shaft flooding;modified cement slurry;underwater waterstop layer;process control

0㊀引言

竖井淹井是井筒建设中的重大灾害事故,科学治

理竖井突水事故已成为井筒建设的关键[1]㊂随着国

内外能源不断开发,深大矿井建设日益成熟,矿山行业也不断完善沉积岩地区竖井治水基本原则[2]㊂井筒突水相关研究在基础理论㊁水文地质调查㊁水害防治等