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隧道运营产生的振动对储气库上覆盖层有着不容忽视的安全影响。为研究交通荷载应力波传播对储气库上覆盖层完整性的影响，以黄草峡储气库为依托，采用有限元数值模拟方法，对渝利铁路客货运列车、沪渝蓉高铁列车和黄草山高速公路载重汽车等不同交通荷载引起的盖层变形量和振动速率进行了分析。结果表明：(1)隧道运营过程中，储气库上覆盖层的变形量和振动速率均未超过安全限值；(2)储气库上覆盖层的变形量随距隧道距离的增大而减小，其中雷口坡组和嘉四4 2套膏岩层受影响较大，而嘉二3膏岩层受影响最小，说明岩性和地层结构对地层响应具有显著的调控作用；(3)上覆盖层在多种交通工况的叠加影响下，其影响主要局限于隧道下部嘉四4膏岩层范围内，未对储气库盖层的完整性造成威胁。研究成果可为复杂交通荷载下储气库上覆盖层完整性评估提供理论支撑和实践指导。
Abstract：Tunnel-induced vibrations can exert a non-negligible impact on the safety of overlying strata in underground gas storage(UGS) reservoir. To investigate the effects of stress wave propagation from traffic loads on the integrity of caprock above UGS, a finite element numerical simulation was conducted based on the Huangcaoxia gas storage reservoir. The deformation and particle velocity responses of the overburden were analyzed under different traffic loads: passenger and freight trains on the Chongqing-Lichuan Railway, highspeed trains on the Shanghai-Chongqing-Chengdu Railway, and heavy trucks on the Huangcaoshan Expressway. The results are as follows :(1) During tunnel operation, both deformation and vibration velocity of the overburden remain within safe limits；(2) Deformation decrease with increasing distance from the tunnel, with T2l and T1 j44 being more significantly affected, while T1 j23 shows minimal deformation, indicating a significant regulatory effect of lithology and stratigraphic structure on the geomechanical response；(3) Under the combined influence of multiple traffic scenarios, the impact is mainly confined to T1 j44 beneath the tunnel and poses no threat to the integrity of the caprock. These findings provide theoretical support and practical guidance for evaluating the integrity of overburden strata under complex traffic-induced dynamic loads in UGS systems.
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基本信息:
DOI：10.13578/j.cnki.issn.1671-1556.20250062
中图分类号:TE972;U456.3
引用信息:
[1]雷宝泽,王时林,苏培东等.隧道交通荷载对储气库盖层完整性的影响[J].安全与环境工程,2025,32(04):57-69.DOI:10.13578/j.cnki.issn.1671-1556.20250062.
基金信息:
重庆天然气储运有限公司科研项目(XNS重庆储运JS2024-03)