自重湿陷性黄土场地地裂缝地铁暗挖隧道涌泥灾害处理与风险控制
胡自全1沙鸣1胡银林2
Treatment of Mud Inrush Disasters and Risk Control for Underground-excavated Metro Tunnel in Self-weighty Saturated Slump Loess Ground Fissure
HU Ziquan1SHA Ming1HU Yinlin2
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作者信息:1.西安市轨道交通集团有限公司，710018，西安
2.绍兴市轨道交通集团有限公司，312099，绍兴
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Affiliation:1.Xi’an Rail Transit Group Co., Ltd., 710018, Xi’an, China
2.Shaoxing Rail Transit Group Co., Ltd., 312099, Shaoxing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.09.044
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中图分类号/CLCN:U455.49; U456.3+3
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栏目/Col:施工技术
摘要:
［目的］黄土饱和湿陷可能出现地下空洞。暗挖隧道穿过自重湿陷性黄土场地地裂缝设防段时，若遇到地下空洞，易引发涌泥灾害，需采取有效的处理措施，以控制施工风险。［方法］以我国某穿越地裂缝的浅埋暗挖法地铁隧道为例，介绍了该工程的概况及地质情况，以及发生涌泥灾害的概要。地质勘探查明地铁右线隧道上方地裂缝破碎带存在黄土空洞，根据该空洞的地层特性及涌泥风险特征，采取了挂网喷射混凝土、小导管注浆固结、型钢及支撑加固、注浆回填空洞等施工措施。在此基础上，进一步阐述了隧道涌泥体清理、隧道二次开挖过程的风险控制措施。［结果及结论］案例工程涌泥灾害的处理措施，以及隧道涌泥体清理、隧道二次开挖过程的风险控制措施是可行、安全的。措施实施后，快速控制了险情，确保了周边建筑物安全。
Abstracts:
［Objective］ Saturated loess slump may lead to underground cavity. When the underground tunnel passes through the fortified fissures section of the self-weighty saturated slump loess site, the encountered underground cavity may likely bring about mud in-rush disaster. Effective treatment measures need be taken to control the construction risks. ［Method］ With the project of a shallow-buried underground-excavated tunnel passing through the ground fissure in a place of China as example, the overview and geological situation of the project is introduced and the mud inrush disaster is summarized. Geological exploration finds that there is a loess cavity in the ground fissure fracture zone above the right metro line of the tunnel. According to the stratum characteristics of the cavity and the mud inrush risk features, construction measures such as spraying concrete on hanged net, small pipe grouting consolidation, steel and support reinforcement, and grouting back-filling of the cavity are taken. Based on this, the risk control measures for the cleaning of tunnel mud inrush and the secondary excavation process of the tunnel are further elaborated. ［Result & Conclusion］ The treatment measures for the mud inrush disaster in the above project and the risk control measures for the cleaning of mud inrush and the tunnel secondary excavation process are feasible and safe. With the measures being taken, the danger is shortly under control, ensuring the safety of the surrounding buildings.
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