桃树坪隧道穿越富水粉细砂地层塌方处治施工技术

张学文

doi:10.3973/j.issn.2096-4498.2018.02.021

隧道建设 >

2018 , Vol. 38 >Issue 2: 308 - 315

DOI: https://doi.org/10.3973/j.issn.2096-4498.2018.02.021

施工技术

桃树坪隧道穿越富水粉细砂地层塌方处治施工技术

张学文

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(中国铁建大桥工程局集团有限公司兰渝铁路工程指挥部，甘肃兰州 730070)

张学文（1977—），男，甘肃漳县人，2001年毕业于辽宁工程技术大学，采矿工程专业，本科，高级工程师，主要从事工程施工管理和技术开发方面的研究工作。Email： 854271109@qq.com。

收稿日期: 2017-06-19

修回日期: 2017-11-13

网络出版日期: 2018-03-19

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Countermeasures for Collapse of Taoshuping Tunnel Crossing Waterrich Finesand Strata

ZHANG Xuewen

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(LanzhouChongqing Railway Project Headquarters of China Railway Construction Bridge Engineering Bureau Group Co., Ltd., Lanzhou 730070, Gansu, China)

Received date: 2017-06-19

Revised date: 2017-11-13

Online published: 2018-03-19

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摘要

兰渝铁路桃树坪隧道为Ⅰ级铁路双线隧道，穿越上第三系富水粉细砂地层，由于粉细砂层成岩作用差，遇水呈流塑状自稳性变差，隧道施工困难，极易发生塌方，塌方处治难度极大，安全风险极高。为解决富水粉细砂层隧道塌方后砂层松散、流动性强、无自稳、塌方处治困难等一系列问题，确保安全快速通过塌方段，以桃树坪隧道3#斜井正洞塌方处治为工程实例，就如何采用 “真空降水+双层大管棚+小管棚+双侧壁法”有效处治富水粉细砂层隧道塌方进行详细论述与总结，成功案例可为类似工程施工提供一定的技术参考和经验借鉴。

关键词： 兰渝铁路; 桃树坪隧道; 富水粉细砂层; 塌方处治; 施工技术; 双层大管棚; 双侧壁法

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张学文 . 桃树坪隧道穿越富水粉细砂地层塌方处治施工技术[J]. 隧道建设, 2018 , 38(2) : 308 -315 . DOI: 10.3973/j.issn.2096-4498.2018.02.021

Abstract

Taoshuping tunnel, a Grade Ⅰ doubleline railway tunnel, crosses tertiary waterrich finesand strata. As a result of the poor diagenesis of finesand strata and bad selfstability when mixing water, the tunnel construction is difficult and the easily encountering of collapse is difficult to treat. In order to deal with the abovementioned problems and guarantee rapid construction of the Taoshuping # 3 Tunnel, the technology of "vacuum dewatering+doublelayer large pipe roof+small pipe roof+doubleside drift method" is discussed and summarized to provide reference for similar projects in the future.

Key words： LanzhouChongqing Railway; Taoshuping Tunnel; waterrich finesand strata; collapse treatment; construction technology; doublelayer large pipe roof; doubleside drift method

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