[1]王崇艮,王茂靖,赵文,等.兰渝铁路梅岭关隧道底鼓段病害成因分析[J].高速铁路技术,2020,11(06):63-68.[doi:10.12098/j.issn.1674-8247.2020.06.012]
　WANG Chonggen,WANG Maojing,ZHAO Wen,et al.Cause Analysis of Diseases in the Floor Heave Section of Meilingguan Tunnel in Lanzhou-Chongqing Railway[J].HIGH SPEED RAILWAY TECHNOLOGY,2020,11(06):63-68.[doi:10.12098/j.issn.1674-8247.2020.06.012]
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兰渝铁路梅岭关隧道底鼓段病害成因分析()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
11卷
期数:
2020年06期
页码:
63-68
栏目:
出版日期:
2020-12-28

文章信息/Info

Title:
Cause Analysis of Diseases in the Floor Heave Section of Meilingguan Tunnel in Lanzhou-Chongqing Railway
文章编号:
1674—8247(2020)06—0063-06
作者:
王崇艮;  王茂靖;  赵文;  吉安娜;  刘亚雄
1. 中铁二院工程集团有限责任公司, 成都 610031;
2. 西南交通大学, 成都 610031
Author(s):
WANG Chonggen;  WANG Maojing;  ZHAO Wen;  JI Anna;  LIU Yaxiong
1. China Railway Eryuan Group Co., Ltd., Chengdu 610031, China;
2. Southwest Jiaotong University, Chengdu 610031, China
关键词:
隧道|底鼓|病害|机理|挤压性围岩|成因分析
Keywords:
tunnel|floor heave|disease|mechanism|compressive surrounding rock|cause analysis
分类号:
U457.2
DOI:
10.12098/j.issn.1674-8247.2020.06.012
文献标志码:
A
摘要:
兰渝铁路梅岭关隧道DK 610+550~DK 610+902段施工过程中发生拱顶初期支护纵向开裂、拱顶下沉及喷混凝土掉块等病害，运营阶段轨道异常超高，发生隧底底鼓病害，虽通过隧底补强措施抑制了隧道底鼓现象，但隧道其它段落仍存在类似病害。本文结合隧道所处的区域地质环境，对比病害整治前后的地质勘察成果，通过蠕变试验、数值分析及理论分析深入研究了隧道底鼓病害机理。梅岭关隧道处于高应力水平层状软质岩层中，构造应力长期对围岩产生挤压作用，施工引起围岩松弛、地下水环境发生改变，使围岩强度降低，软质岩发生蠕变，当隧道结构不能抵抗这种变化时便产生隧底底鼓病害。研究指出隧底仰拱结构强度及曲率是高地应力红层缓倾岩层地段隧道底鼓变形设计的重要参数，研究成果可为类似隧道病害整治及新建隧道设计提供参考。
Abstract:
During the construction of DK 610+550~ DK 610+902 section of Meilingguan Tunnel in Lanzhou-Chongqing Railway, some diseases occurred, such as longitudinal cracking of initial arch crown support, arch crown settlement, and shotcrete spalling. During the operation stage, the track was abnormally high, and the tunnel floor heave occurred. The tunnel floor heave is restrained by the reinforcement measures at the tunnel floor, but similar diseases still exist in other sections of the tunnel. In this paper, combined with the regional geological environment in which the tunnel is located, the mechanism of the tunnel floor heave disease is deeply studied through creep test, numerical analysis and theoretical analysis. Meilingguan tunnel is located in the layered soft rock stratum with high stress level, and the structural stress has squeezed the surrounding rock for a long time. The construction causes the surrounding rock to relax and the groundwater environment to change, which reduces the strength of the surrounding rock and causes the soft rock to creep. When the tunnel structure cannot resist this change, the tunnel floor heave disease will occur. It is pointed out that the strength and curvature of the inverted arch structure at the tunnel bottom are important parameters for the deformation design of tunnel floor heave in the red-bed gently inclined rock section with high ground stress. The research results can provide reference for similar tunnel disease treatment and new project design.

备注/Memo

备注/Memo:
作者简介:王崇艮(1974-),男,高级工程师。引文格式:王崇艮, 王茂靖, 赵文, 等. 兰渝铁路梅岭关隧道底鼓段病害成因分析[J]. 高速铁路技术, 2020, 11(6):63-68.WANG Chonggen, WANG Maojing, ZHAO Wen, et al. Cause Analysis of Diseases in the Floor Heave Section of Meilingguan Tunnel in Lanzhou-Chongqing Railway[J]. High Speed Railway Technology, 2020, 11(6):63-68.
更新日期/Last Update: 2020-12-28