兰渝铁路两水隧道高地应力软岩大变形控制技术

doi:10.3973/j.issn.1672-741X.2014.06.008

隧道建设（中英文） ›› 2014, Vol. 34 ›› Issue (6): 546-553.DOI: 10.3973/j.issn.1672-741X.2014.06.008

兰渝铁路两水隧道高地应力软岩大变形控制技术

赵福善

（中铁十六局集团有限公司，天津 300162）

收稿日期:2014-01-10 修回日期:2014-04-02 出版日期:2014-06-20 发布日期:2014-06-16
作者简介:赵福善（1955—），男，天津人，1979年毕业于石家庄铁道学院，铁路工程专业，本科，高级工程师，主要从事铁路隧道施工管理工作。

Technologies to Control Serious Deformation of Soft Rocks with High Ground Stress: Case Study on Liangshui Tunnel on LanzhouChongqing Railway

ZHAO Fushan

(China Railway 16th Bureau Group Co., Ltd., Tianjin 300162, China)

Received:2014-01-10 Revised:2014-04-02 Online:2014-06-20 Published:2014-06-16

摘要/Abstract

摘要：

兰渝铁路两水隧道地质条件极为复杂，洞身围岩为千枚岩及炭质千枚岩，属极软岩，受高地应力影响，施工时发生了挤压性大变形，变形和破坏极为严重。以现场测试和理论分析为手段，结合隧道变形特征，探索和研究了适合两水隧道的软岩变形控制技术，并得出以下结论：１）软岩隧道的变形特性及稳定性（塑性区）取决于地应力、围岩的力学特性、开挖断面等，且与围岩的支护条件密切相关；２）通过采用加大预留变形量、加大支护刚度、多重支护，优化施工方法、适时施作二次衬砌等手段有效地控制了大变形，较好地解决了两水隧道高地应力软岩施工问题。在此基础上，提出了软岩隧道大变形分级标准及其对应的支护参数。

关键词: 兰渝铁路, 两水隧道, 软岩大变形, 高地应力, 变形控制

Abstract:

The geological conditions of Liangshui tunnel on LanzhouChongqing railway are very complex. The surrounding rocks of the tunnel are phyllite and carbonaceous phyllite, which belong to soft rocks. Serious squeezing deformation and failure induced by high ground stress occur during the construction of the tunnel. In the paper, technologies to control the serious deformation of the soft rocks with high ground stress in Liangshui tunnel is studied on basis of the deformation properties of the tunnel and by means of site testing and theoretical analysis. Conclusions drawn are as follows: 1) The deformation properties and stability of soft rock tunnels (plasticized zone) mainly depend on the ground stress, the mechanical characteristics of surrounding rocks and the dimension of the excavation crosssection, and are closely related to the supporting conditions of the surrounding rocks; 2) The serious deformation of the tunnel has been brought under effective control by adopting such technologies as increasing the deformation allowance, increasing the support rigidity, adopting multiple support, optimizing the construction method and installing the secondary lining timely. Finally, classification standard of serious deformation of soft rock tunnels and corresponding support parameters are proposed.

Key words: LanzhouChongqing railway, Liangshui tunnel, soft rock deformation, high ground stress, deformation control

赵福善. 兰渝铁路两水隧道高地应力软岩大变形控制技术[J]. 隧道建设, 2014, 34(6): 546-553.

ZHAO Fushan. Technologies to Control Serious Deformation of Soft Rocks with High Ground Stress: Case Study on Liangshui Tunnel on LanzhouChongqing Railway[J]. Tunnel Construction, 2014, 34(6): 546-553.

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兰渝铁路两水隧道高地应力软岩大变形控制技术

Technologies to Control Serious Deformation of Soft Rocks with High Ground Stress: Case Study on Liangshui Tunnel on LanzhouChongqing Railway

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