跨多断层水工隧洞精细化动力响应分析

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中图分类号：TU45 文献标志码：A文章编号：1000-4939（2026）02-0324-14

Abstract：There are a large number of hydraulic tunnels built in the strong earthquakearea in southwest China，and the complex geological conditions with multiple faults have a significant influence on the dynamic response of the tunnels. However，the existing researches mainly focus on the simplified geological model of single fault，neglecting thereal three-dimensional spatial formation conditions and the influence of multi-fault distribution on the tunnel.To solve this problem，a fine modeling method of hydraulic tunnel across multi-fault network under complex geological conditions is proposed in this paper.First，a 3D refined solid model is constructed based on the measured engineering data and 3D geological modeling technology，and then the complex mesh is divided by unstructured and structured combination.Finaly，a refined model of hydraulic tunnel across multi-fault network is established to carry out dynamic response analysis by taking the actual project as an example，and the influence of the number of faults and internal water action on dynamic response is studied.The results show that the number of faults has a significant effect on the dynamic response of the tunnel，and the response value increases with the increase of the number of faults. Under earthquake action，the internal water willform pore water pressure concentration area at the fault，and the internal water action will significantly aggravate the seismic response.The maximumincrease of the stability index of the surrounding rock of the tunnel section is 19.6% ，which cannot be overlooked.The bending part of the tunnel is vulnerable to earthquake and needs to be protected.The proposed method and analysis results can provide reference for seismic analysis of hydraulic tunnel under complex geological conditions with multiple faults.

Key words： multi-fault network；highly detailed model； hydraulic tunnel; inner water action；dynamic response

我国水资源时空分布不均，其中西南地区拥有约 80% 的水资源，为实现水资源的优化配置，近年来修建了越来越多的水利水电工程[1-2]。（剩余19655字）