设计、施工、监测

深埋软岩隧道让压支护效果与围岩能量特征研究

  • 王玉龙 ,
  • 郑余朝 ,
  • 赵中栏 ,
  • 朱斌忠
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  • 1.中铁西安勘察设计研究院有限责任公司,西安 710000;
    2.西南交通大学 土木工程学院,成都 610031
王玉龙(1990—),男,甘肃定西人,硕士,高级工程师,主要从事隧道设计研究工作。E-mail:wyl201380@163.com
赵中栏(2001—),男,四川达州人,硕士生,主要从事隧道近接施工研究。E-mail:2563319262@qq.com

收稿日期: 2025-11-15

  网络出版日期: 2026-09-07

基金资助

国家自然科学基金(52078431)

Study on the Effect of Yielding Support and Energy Characteristics of Surrounding Rock in Deep Soft Rock Tunnel

  • Wang Yulong ,
  • Zheng Yuchao ,
  • Zhao Zhonglan ,
  • Zhu Binzhong
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  • 1. China Railway Xi'an Survey and Design Research Institute Co., Ltd., Xi'an 710000 P.R. China;
    2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China

Received date: 2025-11-15

  Online published: 2026-09-07

摘要

作为解决大变形隧道初期支护开裂问题的有效措施,让压支护对初支力学性能及围岩能量特征有重要影响。基于常见让压构件应力应变曲线,总结了让压构件力学特征,基于Beam单元和Interface单元开发了可实现让压构件力学性能数值方法。采用混凝土弹塑性损伤本构模型开展数值计算,讨论了让压构件位置及其恒阻力对初支力学性能、围岩能量等的影响。结果表明:让压构件设于不同位置均有利于减小喷层的内力与损伤、围岩的应力与能量,其中当最大初始地应力方向水平时,水平向变形的让压构件起到的让压效果更佳;让压构件位置一定、恒阻力不同时,喷层最大损伤、弯矩与轴力均随恒阻力增大呈先增加后减小的趋势,洞周围岩应力与弹性应变能密度亦随恒阻力的增大呈先增加后减小的趋势。

本文引用格式

王玉龙 , 郑余朝 , 赵中栏 , 朱斌忠 . 深埋软岩隧道让压支护效果与围岩能量特征研究[J]. 地下空间与工程学报, 2026 , 22(4) : 1390 -1399 . DOI: 10.20174/j.JUSE.2026.04.27

Abstract

As an effective measure to solve the cracking problem of primary support in large deformation tunnels, yielding support has an important influence on the mechanical properties of primary support and the energy characteristics of the surrounding rock. Based on the stress-strain curves of common yielding members, the mechanical characteristics of yielding members are summarized, and a numerical method is developed to realize the mechanical properties of yielding members based on the Beam element and Interface element. The concrete elastoplastic damage constitutive model is used to carry out numerical calculation, and the influence of yield member position and its constant resistance on the mechanical properties of the initial support and surrounding rock energy is discussed. The results indicate that: It is beneficial to reduce the internal force and damage of spray layer and the stress and energy of surrounding rock by setting compression members in different positions, and when the maximum initial geostress is oriented horizontally, the pressure-relief effect of yield members subjected to horizontal deformation is more pronounced. When the yield member position is fixed and the constant resistance is different, the maximum damage of spray layer, bending moment and axial force all increase first and then decrease with the increase of constant resistance, and the rock stress and elastic strain energy density around the hole also increase first and then decrease with the increase of constant resistance.

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