岩土力学 ›› 2025, Vol. 46 ›› Issue (12): 3823-3840.doi: 10.16285/j.rsm.2025.0102CSTR: 32223.14.j.rsm.2025.0102

• 基础理论与实验研究 • 上一篇    下一篇

恒定法向刚度边界下加锚充填节理岩体宏细观剪切蠕变力学特性研究

王贺平1, 2，宋洋1，毛镜涵1，周健华1, 2，李昂1，赵立财3，李庆文4   

  1. 1. 辽宁工程技术大学 土木工程学院，辽宁 阜新 123000；2. 辽宁铁道职业技术学院 铁道工程学院，辽宁 锦州 121000； 3. 中铁十九局集团第三工程有限公司，辽宁 沈阳 110000；4. 辽宁工业大学 土木建筑工程学院，辽宁 锦州 121001
  • 收稿日期:2025-01-26 接受日期:2025-05-07 出版日期:2025-12-11 发布日期:2025-12-13
  • 通讯作者: 宋洋，男，1982年生，博士，教授，主要从事深部岩石力学方向的研究。E-mail: lgdsongyang@163.com
  • 作者简介:王贺平，男，1994年生，博士研究生，主要从事岩石剪切力学方面的研究。E-mail: 18342853048@163.com
  • 基金资助:
    国家自然科学基金（No.52174078，No.51974146）；辽宁省高等学校创新人才支持计划（No.21-1071）。

Macro-meso shear creep mechanical characteristics of jointed rock masses under constant normal stiffness boundary with anchor-filling

WANG He-ping1, 2, SONG Yang1, MAO Jing-han1, ZHOU Jian-hua1, 2, LI Ang1, ZHAO Li-cai3, LI Qing-wen4   

  1. 1. Civil Engineering College, Liaoning Technical University, Fuxin, Liaoning 123000, China; 2. Department of Railway Engineering, Liaoning Railway Vocational and Technical College, Jinzhou, Liaoning 121000, China; 3. The 3rd Engineering Co., Ltd. of China Railway 19th Bureau Group, Shenyang, Liaoning 110000, China; 4. School of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou, Liaoning 121001, China
  • Received:2025-01-26 Accepted:2025-05-07 Online:2025-12-11 Published:2025-12-13
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (52174078, 51974146) and the Funding Project of Innovative Talents Support Program of Universities in Liaoning Province (21-1071).

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摘要： 明确深部加锚充填节理岩体剪切时效性能，对地下工程的安全与长期稳定至关重要。开展恒定法向刚度（constant normal stiffness，简称CNS）边界条件下加锚充填节理岩体剪切蠕变试验，分析充填度Δ、粗糙度JRC、充填物强度σcj 、法向刚度kn 不同组合模式对加锚充填节理岩体切向、法向蠕变特征的影响机制。构建了宏观应力差、细观应力、时间三者的基本关系方程，结合细观计算机断层扫描（computed tomography，简称CT）试验，分析了孔隙体积分数演化规律。在此基础上，建立了考虑宏细观尺度结合的改进西原体非线性剪切蠕变方程。研究结果表明：（1）Δ、JRC、σcj 、kn 4种影响因素主要导致了粗糙凸齿间的爬坡−剪断行为与充填物质磨损行为的差异演化，进而影响了加锚充填节理岩体切向−法向蠕变特征。（2）Δ 为影响加锚充填节理岩体切向蠕变性能的主要因素，JRC、σcj  、kn 三者对加锚充填节理岩体切向蠕变性能影响程度较为接近。（3）提出了可反映加锚充填节理岩体整体时效变形演化特征的锚周挤压破碎区局部协调变形破坏模式。（4）构建了改进的西原体非线性蠕变模型并进行了参数验证及全局灵敏度分析，模型可以很好地描述加锚充填节理岩体加速蠕变阶段，可为深部岩体长期结构性滑移破坏预报起到理论指导作用。

关键词: 恒定法向刚度边界, 剪切蠕变, 加锚充填节理岩体, 宏细观结合

Abstract: For the safety and long-term stability of underground engineering, it is important to clarify the shear time-dependent performance of deep-seated anchored and filled jointed rock masses. Shear creep tests on anchored and filled jointed rock masses under constant normal stiffness (CNS) boundary conditions were conducted, and the influence mechanisms of different combinations of filling degree Δ, joint roughness coefficient JRC, filling material strength σcj , and normal stiffness kn on the tangential and normal creep characteristics of the anchored and filled jointed rock masses were analyzed. A fundamental relationship equation among macroscopic stress difference, mesoscopic stress, and time was established. Combined with mesoscopic computed tomography (CT) experiments, the evolution law of pore volume fraction was analyzed. On this basis, an improved nonlinear shear creep equation of the Nishihara model considering the combination of macroscopic and mesoscopic scales was established. The research results indicate that: 1) The four influencing factors of Δ , JRC,σcj  and kn mainly lead to the differential evolution of the climbing-shearing behavior between rough asperities and the wear behavior of the filling material, which in turn affects the tangential and normal creep characteristics of the anchored and filled jointed rock masses; 2) Δ  is the main factor affecting the tangential creep performance of the anchored and filled jointed rock masses, and the influence degrees of JRC, σcj and kn  on the tangential creep performance of the anchored and filled jointed rock masses are relatively close; 3) A localized coordinated deformation failure mode of the anchoring-induced compression and fragmentation zone was proposed to reflect the overall time-dependent deformation evolution characteristics of the anchored and filled jointed rock masses; 4) An improved Nishihara nonlinear creep model was constructed, and its parameters were verified and subjected to global sensitivity analysis. The model can effectively describe the accelerated creep stage of anchored and filled jointed rock masses and can provide theoretical guidance for the long-term structural slip failure prediction of deep-seated rock masses.

Key words: constant normal stiffness boundary, shear creep, anchored and filled jointed rock masses, integration of macroscopic and mesoscopic scales

中图分类号: TU458
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