富水软弱带公路隧道支护技术研究

›› 2011, Vol. 32 ›› Issue (S2): 449-454.

富水软弱带公路隧道支护技术研究

郭小红^{1, 2}，陈飞飞²，褚以惇²，乔春江²

1. 北京交通大学隧道及地下工程教育部工程研究中心，北京 100044；2. 中交第二公路勘察设计研究院有限公司，武汉 430056

收稿日期:2011-05-17 出版日期:2011-08-10 发布日期:2011-08-26
作者简介:郭小红，男，1966年生，博士，教授级高级工程师，主要从事地下工程方面的研究工作
基金资助:
国家自然科学基金（No. 41072238，51004097，51009133）

Research on support techniques for tunnel in watery and weak stratum

GUO Xiao-hong^{1, 2}, CHEN Fei-fei², CHU Yi-dun², QIAO Chun-jiang²

1. Engineering Research Center of Tunnel and Underground Engineering, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China; 2. Second Highway Consultants Co., Ltd., China Communications Construction Corporation, Wuhan 430056, China

Received:2011-05-17 Online:2011-08-10 Published:2011-08-26

摘要/Abstract

摘要： 大奎隧道是炎汝高速公路炎陵至汝城段的一座公路隧道，地质条件极其复杂，隧道施工后，初期支护发生严重变形，钢支撑被压弯，下沉量严重侵入建筑限界。综合现场监测、地质雷达扫描结果，从涌水特征、地质情况和施工方法3方面出发，系统分析了大奎隧道富水软弱带初期支护后隧道严重变形的原因，并在此基础上，研究支护失效段和掌子面的支护设计及施工组织方案，提出三大治理措施：一是控制涌水，二是反压回填及加固围岩，三是优化施工工法。监测结果显示：上述措施实施后，取得了非常满意的效果，保证了复杂地质条件下隧道施工的安全。该成果对富水软弱地层隧道修建具有重要的指导作用和参考价值。

关键词: 初期支护, 涌水, 侵限, 大变形

Abstract: Dakui tunnel is a highway tunnel on the Yanling-Rucheng expressway; its geological condition is very complicated. After the tunnel construction, the first support deformed seriously; the steel support was bent; and the sinkage exceeded the construction limit seriously. Combining the in-situ measurement results with the ground penetrating radar (GPR) scanning results, the reason for serious tunnel deformation after first support in watery and weak zone is analyzed based on the water gushing feature, geological condition and the construction method. Then, the support design and construction organization scheme for tunnel face and segments with failure support are studied. And three treatment measures are proposed as follows: 1) controlling the water gushing; 2) backfilling with back pressure and reinforcing the surrounding rock; 3) optimizing the construction method. According to the measurement results, it is shown that the three above treatment measures are good for controlling the tunnel deformation and ensuring the safety of tunnel construction under complicated geological condition. This research plays an important guiding role and provides a significant reference value for tunnel construction in watery and weak stratum.

Key words: first support, water gushing, intrusion displacement, large deformation

中图分类号:

U 455

郭小红，陈飞飞，褚以惇，乔春江. 富水软弱带公路隧道支护技术研究[J]. , 2011, 32(S2): 449-454.

GUO Xiao-hong , CHEN Fei-fei , CHU Yi-dun, QIAO Chun-jiang　. Research on support techniques for tunnel in watery and weak stratum[J]. , 2011, 32(S2): 449-454.

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