基于支护参数优化的强震区软岩隧道变形控制技术研究

›› 2013, Vol. 34 ›› Issue (4): 1147-1155.

基于支护参数优化的强震区软岩隧道变形控制技术研究

周艺，何川，汪波，邹育麟

西南交通大学交通隧道工程教育部重点实验室，成都 610031

收稿日期:2012-01-17 出版日期:2013-04-10 发布日期:2013-04-16
作者简介:周艺，男，1985年生，博士研究生，主要从事隧道与地下工程研究。
基金资助:
国家科技支撑计划课题资助（No. 2012BAG05B03)；国家杰出青年科学基金资助（No. 50925830）；国家973项目计划课题资助（No. 2010CB732105）；中央高校基本科研业务费专项资金资助（No. SWJTU11ZT33，No.SWJTU12CX066）；四川省交通科技项目资助（No. 2008.1-1-1）。

Research on deformation control technology for tunnels in soft rocks and meizoseismic area based on supporting parameters optimization

ZHOU Yi, HE Chuan, WANG Bo, ZOU Yu-lin

Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China

Received:2012-01-17 Online:2013-04-10 Published:2013-04-16

摘要/Abstract

摘要： 为探明强震区千枚岩地层中长大山岭隧道支护参数变化与衬砌结构变形的相互作用关系，基于新奥法施工理念，结合强震区在建杜家山绢云千枚岩隧道现场试验段的实际施工过程，根据采取的三台阶施工方法，以试验段设置的5种支护方案为依托，对各种情形下隧道变形及主体结构内力进行现场动态跟踪测试，探讨隧道施工过程中随各部开挖不同支护方案下拱顶沉降、周边收敛、地表沉降及结构内力的变化关系，分析初步认定支护强度及刚度大的F5方案更适用于震区千枚岩隧道施工。对5种方案的施工过程进行三维有限元弹塑性模拟，通过对开挖后隧道变形、支护受力与现场监测值的对比分析，对施工过程中隧道结构的安全性和围岩稳定性做出评价。现场试验和数值模拟结果综合分析表明，仅有两种（F4、F5）方案适用于隧道开挖，而F5方案的隧道变形及结构受力较其余4种方案更为合理，该方案的成功运用也验证了这一方案的合理、有效性。在该基础上总结提出的软岩隧道支护参数技术要领及方法可供类似工程参考。

关键词: 千枚岩隧道, 隧道变形, 支护优化, 现场试验, 数值模拟

Abstract: In order to find out the relationship between liner structure deformation and the support parameters of long tunnel with large cross-section built in phillite stratum of meizo seismic area, the paper takes a dynamic deformation and inner forces field test of 5 different support types on the basis of new concept, combining with the actual three-stepped method adopted in Dujiashan tunnel of experimental section under construction, the variation of tunnel crown settlement, peripheral convergence displacement, ground surface settlement and structure inner forces under different excavation and support schemes are discussed. After analysis, some preliminary conclusions are drawn as follows. The strong strength and rigidity of scheme F5 is more suitable for thousand pieces rock tunnel construction. Then 3D elasticplastic finite element simulation of the construction process under 5 kinds of construction schemes is carried out; and the tunnel structure safety and surroundings rock stability during construction are evaluated by the comparative analyses of simulated tunnel deformation and support inner forces and those of field tested after excavation. The comprehensive analyses of field test and numerical simulation results show that there are only 2 (F4 and F5) support schemes are suitable for the tunnel excavations; and the tunnel deformation and structure inner forces are more reasonable of F5 scheme comparing to any other schemes. F5’s reasonableness and effectiveness are also certified by the successful application in practice. The above-mentioned support parameter determination technology and methods of tunnels built in soft rock can provide reference for similar projects.

Key words: phyllite tunnel, tunnel deformation, support optimization, field test, numerical simulation

中图分类号:

U 45

周艺，何川，汪波，邹育麟. 基于支护参数优化的强震区软岩隧道变形控制技术研究[J]. , 2013, 34(4): 1147-1155.

ZHOU Yi, HE Chuan, WANG Bo, ZOU Yu-lin. Research on deformation control technology for tunnels in soft rocks and meizoseismic area based on supporting parameters optimization[J]. , 2013, 34(4): 1147-1155.

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