[1]马有良.复杂地应力环境下隧道底鼓处治技术研究[J].高速铁路技术,2024,15(03):68-72，80.[doi:10.12098/j.issn.1674-8247.2024.03.013]
　MA Youliang.Study on Treatment Techniques for Tunnel Floor Heave in Complex Crustal Stress Environments[J].HIGH SPEED RAILWAY TECHNOLOGY,2024,15(03):68-72，80.[doi:10.12098/j.issn.1674-8247.2024.03.013]
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复杂地应力环境下隧道底鼓处治技术研究()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
15卷
期数:
2024年03期
页码:
68-72，80
栏目:
研究创新
出版日期:
2024-06-20

文章信息/Info

Title:
Study on Treatment Techniques for Tunnel Floor Heave in Complex Crustal Stress Environments
文章编号:
1674-8247（2024）03-0068-05
作者:
马有良
中国铁路昆明局集团有限公司，云南?玉溪 653100
Author(s):
MA Youliang
China Railway Kunming Bureau Group Co. ，Ltd. ，Yuxi 653100 ，China
关键词:
复杂地应力环境; 仰拱底鼓; 沉降监测; 矢跨比
Keywords:
complex crustal stress environment; invert floor heave; settlement monitoring; span-to-rise ratio
分类号:
U457
DOI:
10.12098/j.issn.1674-8247.2024.03.013
文献标志码:
A
摘要:
西南地区某隧道仰拱出现底鼓病害，道床开裂变形严重，底鼓速率快，运营安全隐患高。为安全高效处治运营线路无砟轨道隧道底鼓病害问题，采用现场调查、探孔验证、地质补勘等方式，对既有隧道结构现状、病害成因进行了调查，优选了处置方案。结果表明：（1）通过对病害发育程度、地下水情况、混凝土状态、围岩地应力、结构变形等因素的综合分析，得出复杂地应力环境下缓倾软弱岩层与地下水的相互作用是造成该隧道上拱的主要原因；（2）对隧底注浆加固、隧底微型桩、隧底桩筏结构、道床抗拉锚杆（索）及隧底拆换并加深加强结构等方案进行比选，确定采用增大矢跨比、隧底加深加强的拆换重构方案；（3）在施工过程中加强应急管理，根据沉降观测、应力监测、隧底围岩位移监测等数据分析，及时优化调整设计方案，整治完成后效果良好。研究成果可供后续工程借鉴和参考。
Abstract:
Floor heave and serious track bed cracking deformation occurred in the invert of a tunnel in southwestern China，with rapid heaving rates posing significant operational safety hazards. To address the issue of floor heave in ballastless track tunnels along operational lines efficiently and safely，field investigations，borehole verifications，and supplementary geological explorations were conducted to assess the existing tunnel structure’s status and identify the causes of the defects. An optimal remediation strategy was then selected. The findings are as follows：（1）Through a comprehensive analysis of factors including the degree of defect development，groundwater conditions，concrete condition，surrounding rock stress，and structural deformation，it was deduced that the interaction between gently dipping weak rock layers and groundwater under complex crustal stress environments is the primary cause of heaving in this tunnel. （2）Various remediation options，including grouting reinforcement of the tunnel floor，micro-piles of the tunnel floor，raft foundation of the tunnel floor，tensile anchor（cable）in the track bed，and replacement and reinforcement and deepening of the tunnel floor，were compared. Ultimately，the solution of increasing the span-to-rise ratio and reconstructing the tunnel floor by deepening and reinforcing was adopted. （3）During construction，emergency management was intensified，and designs were timely optimized and adjusted based on settlement monitoring，stress monitoring，and surrounding rock displacement monitoring data analyses. The post-treatment effects proved satisfactory. The experiences gathered from this study can serve as a reference for future projects.

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备注/Memo

备注/Memo:
收稿日期：2024-04-10
作者简介：马有良（1972-），男，高级工程师。
更新日期/Last Update: 2024-06-30