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桃树坪隧道穿越富水粉细砂地层双导洞超前法施工技术
收稿日期: 2015-03-26
修回日期: 2016-02-27
网络出版日期: 2016-05-25
Advanced Doubledrift Construction Technologies for Taoshuping Tunnel Crossing Waterrich Fine Silty Sand Strata
Received date: 2015-03-26
Revised date: 2016-02-27
Online published: 2016-05-25
张学文 . 桃树坪隧道穿越富水粉细砂地层双导洞超前法施工技术[J]. 隧道建设, 2016 , 36(5) : 577 -584 . DOI: 10.3973/j.issn.1672-741X.2016.05.013
Taoshuping tunnel on LanzhouChongqing Railway is a Grade Ⅰ doubleline railway tunnel; it crosses waterrich fine silty sand strata. The surrounding rocks of the tunnel are bad and unstable. During the construction of Taoshuping Tunnel, large water inrush and softening of waterrich fine silty sand strata occur. As a result, doubledrift method is adopted to carry out drainage construction. The technical problem of the excavation of tunnel crossing waterrich fine silty sand strata has been solved and the deformation of primary support has been brought under effective control.
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