引水洞爆破施工对既有隧道衬砌的影响分析

doi:10.3973/j.issn.1672-741X.2014.03.007

隧道建设（中英文） ›› 2014, Vol. 34 ›› Issue (3): 221-225.DOI: 10.3973/j.issn.1672-741X.2014.03.007

引水洞爆破施工对既有隧道衬砌的影响分析

孔景华

（中铁十六局集团第一工程有限公司，北京 101300）

收稿日期:2013-12-08 修回日期:2014-02-28 出版日期:2014-03-20 发布日期:2014-03-20
作者简介:孔景华（1979—），女，陕西西安人，2004年毕业于兰州铁道学院，土木工程专业，本科，工程师，从事铁路施工技术管理工作。

Analysis on Influence on Lining of Existing Railway Tunnel Imposed by Blasting Construction of Waterreleasing Tunnel

KONG Jinghua

(China Railway 16th Bureau Group Co., Ltd.,Beijing 101300, China)

Received:2013-12-08 Revised:2014-02-28 Online:2014-03-20 Published:2014-03-20

摘要/Abstract

摘要：

某铁路隧道建成运营后，受溶洞区域水压大的影响，岩溶核心段出现衬砌渗漏水现象。为了解决衬砌渗漏水问题，通过在正洞顶部施作引水洞，截取岩溶水，减小作用在隧道衬砌周围的荷载。本文结合某铁路隧道引水洞爆破施工，通过从爆破震动、结构变形等动态监控和土压力、型钢应力、混凝土应变等静态监控，分析引水洞施工期间正洞衬砌结构受力和变形情况，得出爆破震动速度和结构受力都控制在允许标准以内，并且隧道结构变形很小、结构受力相对稳定，说明引水洞施工对正洞衬砌结构影响小，保证了运营线的安全。

关键词: 引水洞, 爆破施工, 隧道衬砌, 影响分析

Abstract:

Due to the high water pressure in the karst cave area, water seepage occurs to a railway tunnel after it has been put into operation. Two waterreleasing tunnels are excavated on top of the mentioned railway tunnel to intercept the karst water and to reduce the load on the tunnel lining, so as to solve the water seepage problem. In the paper, the blasting construction of the waterreleasing tunnel is presented, the loading on and deformation of the main railway tunnel during the construction of the waterreleasing tunnel are analyzed on basis of the results of the monitoring of the blasting vibration, the structural deformation, the surrounding rock pressure, the stress on the shapedsteel arches and the strain of the concrete lining. The analysis shows that both the blasting vibration velocity and the stress on the main railway tunnel structure are within the allowed standard, the deformation of the main railway tunnel structure is small and the loading on the main railway tunnel structure is relatively stable. It is concluded that the influence of the blasting construction of the waterreleasing tunnel on the main railway tunnel is small and the normal operation of the railway line can be guaranteed.

Key words: waterreleasing tunnel, blasting construction, tunnel lining, influence analysis

孔景华. 引水洞爆破施工对既有隧道衬砌的影响分析[J]. 隧道建设, 2014, 34(3): 221-225.

KONG Jinghua. Analysis on Influence on Lining of Existing Railway Tunnel Imposed by Blasting Construction of Waterreleasing Tunnel[J]. Tunnel Construction, 2014, 34(3): 221-225.

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引水洞爆破施工对既有隧道衬砌的影响分析

Analysis on Influence on Lining of Existing Railway Tunnel Imposed by Blasting Construction of Waterreleasing Tunnel

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