| 王安春,苏培东,温建闯,魏国俊,董祥勇,李勇,唐芬.地铁盾构隧道浅层天然气驱替适宜性评价模型及应用研究[J].矿产勘查,2025,16(S2):180-189 |
| 地铁盾构隧道浅层天然气驱替适宜性评价模型及应用研究 |
| Evaluation model and applicability study on shallow natural gas displacement in subway shield tunnels |
| 投稿时间：2025-11-30 |
| DOI：10.20008/j.kckc.2025s2025 |
| 中文关键词: 盾构隧道 浅层天然气 模糊综合评价 适宜性评价 |
| 英文关键词: shield tunnel shallow natural gas fuzzy comprehensive evaluation suitability evaluation |
| 基金项目:本文受四川省重大科技专项“重大铁路实物资料数字化保存与资源化利用关键技术研究”(2024ZDZX0009)资助。 |
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| 中文摘要: |
| 在隧道工程建设中，浅层天然气常构成严重威胁，驱替技术是防控其危害的关键手段，针对地铁盾构隧道浅层天然气治理中驱替技术适用性不明确的问题，本研究提出一种多维度适宜性评价体系。基于浅层天然气赋存机理与驱替工程特征，构建包含地质条件、驱替有效性及工程效益的 9项评价指标，结合模糊综合评价法建立分级判定标准，形成驱替适宜性量化模型，为隧道浅层天然气驱替治理方案提供依据。依托成眉线工程开展实证分析，结果表明: YCK63+300~YCK63+500段( T值=3. 094)驱替效果显著， 60 min内 天然气含量下降；而 YCK62+900~YCK63+100段( T值=2. 452)因渗透率低( 0. 7×10.1.m2)不适宜直接驱替。 该模型可为隧道工程浅层天然气驱替治理的精准决策提供理论支持。 |
| 英文摘要: |
| In tunnel construction，shallow natural gas often poses serious threats，and displacement technol.ogy serves as a key measure to mitigate these hazards. To address the unclear applicability of displacement technol.ogy in shallow natural gas treatment for subway shield tunnels，this study proposed a multi-dimensional suitability evaluation system. Based on the occurrence mechanism of shallow natural gas and the characteristics of displace.ment engineering，nine evaluation indicators were constructed，covering geological conditions，displacement effectiveness，and engineering benefits. Graded evaluation criteria were established using the fuzzy comprehensiveevaluation method，forming a quantitative model for displacement suitability and providing a basis for designingtreatment strategies for shallow natural gas in tunnels. An empirical analysis based on the Chengdu-Meishan Line project showed that the section YCK63+300– YCK63+500(T-value = 3. 094)demonstrates significant displace. ment effectiveness，with natural gas content decreasing within 60 minutes. In contrast，the section YCK62+900– YCK63+100(T-value = 2. 452)is unsuitable for direct displacement due to its low permeability(0. 7×10.1. m2). This model provides theoretical support for precise decision-making in shallow natural gas displacement treatment for tunnel engineering. |
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