Parametric study of tunnel fault resistance using numerical modeling and orthogonal experiment for segmental lining design

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2025-06-14 DOI:10.1016/j.soildyn.2025.109599

Qi Wang , Yiying Chen , Song Wang , Ping Geng , Peisong Li , Huoming Shen , Lin Deng

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Abstract

Segmental linings can effectively mitigate tunnel damage caused by normal fault dislocation. To improve the tunnel's resistance to normal fault displacement, the fault resistance performance of segmental linings composed of conventional reinforced concrete segments and basalt fiber-filled concrete segments was investigated. A numerical model of the tunnel-surrounding rock system was established and verified for predicting deformation and damage evolution. Nine orthogonal experiments yielded a comprehensive six-indicator evaluation system for quantitatively assessing tunnel failure. Range analysis methodology was employed to quantify parameter sensitivity through calculation of damage index ranges across parameter levels. This systematically ranked the relative influence of: conventional segment length (6m, 9m, 12m), basalt fiber-filled segment length (0.4m, 0.6m 0.8m), and basalt fiber volume content (0.5 %, 0.4 %, 0.3 %) on the tunnel fault resistance. The results show that fiber-filled segmental linings perform well in most indicators. Shorter conventional reinforced concrete segmental length reduces plastic damage and enhance the tunnel's fault dislocation resistance. Basalt fiber-filled concrete accommodates larger fault displacements, reduces lining damage, and lowers the load utilization ratio. Increasing the fiber-filled segmental length reduces lining damage while decreasing the load utilization ratio, whereas narrowing it confines fault influence; thus, an optimal length balances these effects and modulates the load utilization ratio.

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分段衬砌设计中隧道断层抗力的数值模拟与正交试验参数化研究

分段衬砌可以有效地减轻正断层位错对巷道的破坏。为提高隧道抗正断层位移能力，对由常规钢筋混凝土管片和玄武岩纤维填充混凝土管片组成的管片衬砌抗断层位移性能进行了研究。建立了隧道-围岩系统的数值模型，并对其进行了验证。通过9次正交试验，建立了一套定量评价隧道破坏的六指标综合评价体系。采用极差分析法，通过计算各参数水平的损伤指数极差来量化参数敏感性。系统排序了常规管段长度（6m、9m、12m）、玄武岩纤维填充管段长度（0.4m、0.6m、0.8m）、玄武岩纤维体积含量（0.5%、0.4%、0.3%）对隧道抗断层性的相对影响。结果表明，纤维填充的节段衬里在大多数指标上表现良好。常规钢筋混凝土管段长度的缩短减少了塑性损伤，提高了隧道的抗断层错动能力。玄武岩纤维混凝土可容纳较大的断层位移，减少衬砌损伤，降低荷载利用率。增大纤维填充段长度可减少衬里损伤，同时降低载荷利用率，而减小纤维填充段长度可限制故障影响；因此，最佳长度可以平衡这些影响并调节负载利用率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.