岩土力学 ›› 2022, Vol. 43 ›› Issue (8): 2123-2135.doi: 10.16285/j.rsm.2021.1457

• 基础理论与实验研究 • 上一篇    下一篇

隧道分级让压支护作用下围岩 弹塑性变形全过程解析

董建华1, 2,徐斌1, 2,吴晓磊1, 2,连博1, 2   

  1. 1. 兰州理工大学 甘肃省土木工程防灾减灾重点实验室,甘肃 兰州 730050; 2. 兰州理工大学 西部土木工程防灾减灾教育部工程研究中心,甘肃 兰州 730050
  • 收稿日期:2021-08-30 修回日期:2022-03-22 出版日期:2022-08-11 发布日期:2022-08-17
  • 作者简介:董建华,男,1980年生,博士,教授,主要从事隧道与边坡静动力分析方面的教学与研究工作。
  • 基金资助:
    国家自然科学基金(No. 52178335);中央引导地方科技发展资金(No. YDZX20216200001739);陇原青年创新创业人才(团队)项目 (No. 2020RCXM120);兰州市十大科技创新项目(No. 2020-2-11);甘肃省知识产权局高价值专利培育和转化项目(No. 20ZSCQ034);甘肃省基础研究创新群体项目(No. 20JR10RA205)。

Elastic-plastic deformation of surrounding rocks under graded yielding support of tunnel

DONG Jian-hua1, 2, XU Bin1, 2, WU Xiao-lei1, 2, LIAN Bo1, 2   

  1. 1. Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
  • Received:2021-08-30 Revised:2022-03-22 Online:2022-08-11 Published:2022-08-17
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (52178335), the Central Government Guides Local Science and Technology Development Fund Projects (YDZX20216200001739), the Longyuan Youth Innovation and Entrepreneurship Talent (Team Project) (2020RCXM120), the Ten Science and Technology Innovation Projects in Lanzhou City (2020-2-11), the High Value Patent Cultivation and Transformation Project of Gansu Intellectual Property Office (20ZSCQ034) and the Gansu Basic Research Innovation Group Project (20JR10RA205).

摘要: 为了解决高地应力软岩隧道支护结构失效等问题,基于合理释放围岩应力、减小支护结构受力等原理,提出了液压式隧道分级让压支护结构。考虑开挖面的空间效应及围岩应变软化条件,通过分析虚拟支护力的衰减规律,建立了围岩压力、虚拟支护力与支护反力的静力平衡方程,研究了各阶段支护结构与围岩的协同作用,得到了围岩在支护结构变形全过程的位移与应力变化关系,揭示了该支护结构的支护效果。通过算例分析与数值模拟,结果表明:围岩应力在两次让压阶段显著释放,围岩变形特点与结构让压特性保持一致;理论计算值与模拟值的变化趋势一致,验证了理论分析的合理性;所提出结构能有效释放围岩应力,减小支护结构受力,避免了支护结构的屈服破坏,解决了高地应力软岩隧道支护难题,为该支护结构的应用与发展提供了理论支持。

关键词: 隧道工程, 应力释放, 全过程解析, 虚拟支护力, 应变软化

Abstract: In order to solve the failure of support structure of tunnel in high stress soft rock, based on the principle of reasonably releasing the stress in surrounding rocks and reducing the stress of support structure, a hydraulic tunnel graded yielding support structure is proposed. Considering the spatial effect of the excavation surface and the strain softening condition of the surrounding rocks, by analyzing the attenuation law of the virtual supporting force, the static balance equation of stress in the surrounding rocks, the virtual support force and the support reaction force is established. The synergy between the supporting structure and the surrounding rocks at each stage is studied to generate the relationship between the displacement and stress of the surrounding rocks in the whole deformation process of the support structure. The supporting effect of the proposed graded yielding support structure is revealed. The results show that the stress of surrounding rocks is significantly released at the two yielding stages and the deformation characteristics of surrounding rocks are consistent with the yielding characteristics of structure. The simulation results show the consistent variation trend with that of the theoretical values, which verifies the rationality of the theoretical analysis. The proposed yielding support structure can effectively release the stress in the surrounding rocks and reduce the stress of the supporting structure. It can avoid the yield failure of the support structure, solving the support problem of the tunnel in the soft rock with high stress, which can provide theoretical support for the application and development of the support structure.

Key words: tunnel engineering, stress relief, whole process analysis, virtual support force, strain softening

中图分类号: 

  • TU 448
[1] 焦钰祺, 贺林林, 梁越, 刘旭菲, . 考虑结构性黏土应变软化效应的 桩靴竖向承载特性研究[J]. 岩土力学, 2022, 43(5): 1374-1382.
[2] 李鹏飞, 勾宝亮, 朱萌, 高晓静, 郭彩霞. 基于镜像法的隧道地表沉降时间效应计算方法[J]. 岩土力学, 2022, 43(3): 799-807.
[3] 王永红, 杜文, 张国辉, 宋扬, . 基于广义张−朱强度准则的深埋隧道 围岩塑性分析及应用探讨[J]. 岩土力学, 2022, 43(3): 819-830.
[4] 朱文波, 戴国亮, 王博臣, 龚维明, 孙捷, 胡皓, . 吸力式沉箱底部土体循环特性 及其等效循环蠕变模型研究[J]. 岩土力学, 2022, 43(2): 466-478.
[5] 宋战平, 郭德赛, 徐甜, 华伟雄, . 基于非线性模糊层次分析法的TBM 施工风险评价模型研究[J]. 岩土力学, 2021, 42(5): 1424-1433.
[6] 张振, 张朝, 叶观宝, 王萌, 肖彦, 程义, . 劲芯水泥土桩承载路堤渐进式失稳破坏机制[J]. 岩土力学, 2020, 41(6): 2122-2131.
[7] 金俊超, 佘成学, 尚朋阳. 基于Hoek-Brown准则的岩石应变软化模型研究[J]. 岩土力学, 2020, 41(3): 939-951.
[8] 王伟, 陈国庆, 郑水全, 张广泽, 王栋, . 考虑张拉-剪切渐进破坏的边坡矢量和法研究[J]. 岩土力学, 2019, 40(S1): 468-476.
[9] 严健, 何川, 晏启祥, 许金华. 雀儿山隧道冰碛地层冻胀力原位测试及计算分析[J]. 岩土力学, 2019, 40(9): 3593-3602.
[10] 金俊超, 佘成学, 尚朋阳. 基于应变软化指标的岩石非线性蠕变模型[J]. 岩土力学, 2019, 40(6): 2239-2246.
[11] 徐 鹏, 蒋关鲁, 雷 涛, 刘 琪, 王智猛, 刘 勇, . 考虑填土强度的加筋土挡墙动位移计算[J]. 岩土力学, 2019, 40(5): 1841-1846.
[12] 于 正, 杨龙才, 张 勇, 赵 伟, . 考虑地层变异特征一致性的围岩变形不确定性分析[J]. 岩土力学, 2019, 40(5): 1947-1956.
[13] 王凤云, 钱德玲, . 基于统一强度理论深埋圆形隧道围岩的剪胀分析[J]. 岩土力学, 2019, 40(5): 1966-1976.
[14] 严 健, 何 川, 汪 波, 蒙 伟, . 高地温对隧道岩爆发生的影响性研究[J]. 岩土力学, 2019, 40(4): 1543-1550.
[15] 王 腾, 吴 瑞. 黏土中海底管线竖向贯入阻力研究[J]. 岩土力学, 2019, 40(3): 871-878.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 姚仰平,侯 伟. 土的基本力学特性及其弹塑性描述[J]. , 2009, 30(10): 2881 -2902 .
[2] 徐金明,羌培,张鹏飞. 粉质黏土图像的纹理特征分析[J]. , 2009, 30(10): 2903 -2907 .
[3] 向天兵,冯夏庭,陈炳瑞,江 权,张传庆. 三向应力状态下单结构面岩石试样破坏机制与真三轴试验研究[J]. , 2009, 30(10): 2908 -2916 .
[4] 石玉玲,门玉明,彭建兵,黄强兵,刘洪佳. 地裂缝对不同结构形式桥梁桥面的破坏试验研究[J]. , 2009, 30(10): 2917 -2922 .
[5] 夏栋舟,何益斌,刘建华. 土-结构动力相互作用体系阻尼及地震反应分析[J]. , 2009, 30(10): 2923 -2928 .
[6] 徐速超,冯夏庭,陈炳瑞. 矽卡岩单轴循环加卸载试验及声发射特性研究[J]. , 2009, 30(10): 2929 -2934 .
[7] 张力霆,齐清兰,魏静,霍倩,周国斌. 淤填黏土固结过程中孔隙比的变化规律[J]. , 2009, 30(10): 2935 -2939 .
[8] 张其一. 复合加载模式下地基失效机制研究[J]. , 2009, 30(10): 2940 -2944 .
[9] 易 俊,姜永东,鲜学福,罗 云,张 瑜. 声场促进煤层气渗流的应力-温度-渗流压力场的流固动态耦合模型[J]. , 2009, 30(10): 2945 -2949 .
[10] 陶干强,杨仕教,任凤玉. 崩落矿岩散粒体流动性能试验研究[J]. , 2009, 30(10): 2950 -2954 .