›› 2017, Vol. 38 ›› Issue (8): 2279-2285.doi: 10.16285/j.rsm.2017.08.016

• 基础理论与实验研究 • 上一篇    下一篇

锚固方式对节理岩体剪切性能影响试验研究

腾俊洋1, 2,张宇宁1, 2,唐建新1, 2,张 闯1, 2,李臣林1, 2   

  1. 1. 重庆大学 煤矿灾害动力学与控制国家重点实验室,重庆 400044;2.重庆大学 资源及环境科学学院,重庆 400044
  • 收稿日期:2016-10-08 出版日期:2017-08-11 发布日期:2018-06-05
  • 作者简介:腾俊洋,男,1989年生,博士研究生,主要从事隧道及地下工程围岩稳定性研究工作。
  • 基金资助:

    煤矿灾害动力学与控制国家重点实验室自主课题重点项目(No. 2011DA105287-ZD201504)

Experimental study on shear behavior of jointed rock mass with anchorage mode

TENG Jun-yang1, 2, ZHANG Yu-ning1, 2, TANG Jian-xin1, 2, ZHANG Chuang1, 2, LI Chen-lin1, 2   

  1. 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; 2. College of Resources and Environmental Sciences, Chongqing University, Chongqing 400044, China
  • Received:2016-10-08 Online:2017-08-11 Published:2018-06-05
  • Supported by:

    This work was supported by Scientific Research Foundation of State Key Lab. of Coal Mine Disaster Dynamics and Control (2011DA105287-ZD201504).

摘要: 分别采用预制混凝土块、45号钢螺杆、矿用化学浆液来模拟围岩、锚杆及锚固剂进行节理岩体室内剪切试验,研究在无锚、端锚和全锚3种情况下节理岩体抗剪特性及锚杆受力变形特征。研究结果表明:在不同锚固方式下节理岩体的剪力-位移曲线有显著的差异,无锚试件表现为脆性特征;端锚试件在调动锚杆抗剪强度时会有一剪力小幅下降的转折点,全锚试件与节理匹配性较好,可以承受更大的剪力;对于加锚试件,无论是端锚还是全锚锚杆,根据锚杆变形特点,均可分为拉伸区、剪拉区和压缩区。锚杆在剪力和拉力综合作用下破坏时即发生在剪拉区。锚固方式不同,剪切试验过程中锚杆轴力分布也不同,全锚锚杆主要分布于节理面附近,随着与节理距离增加,轴力迅速衰减。端锚锚杆轴力分布则相对均匀。

关键词: 隧道工程, 锚固方式, 剪切试验, 节理岩体, 破坏形式

Abstract: In this study, precast concrete blocks, #45 steel screw, mine chemical grout were used to simulate the surrounding rock and bolt. Shear tests of bolted jointed rock specimens were carried out to study characteristics of jointed shear stress and the cable deformation under three conditions of no-anchored, end-anchored and full-anchored specimens. The results show that obvious differences were found in curves of shear-jointed rock displacement with various anchoring ways. The no-anchor specimen was characterized as brittle. For the end-anchored specimen, a turning point was found in the slightly decreased shear when adjusting the shear strength of anchor. Compared with the above two specimens, the best matching was achieved by the full-anchored specimen with the joint, which indicates that the bolted specimen could bear the greatest shear force. For both the end-anchored bolt and the full-anchor bolt, their deformation characteristics can be divided into the tensile zone, shear-tension zone and compression zone. Under the combined action of shear and tension, the failure of the anchored bolt occurred in the shear-tension zone. With different anchorage modes, the distribution of axial force varied as well during the shear test. The axial force of full-anchored bolt was mainly distributed in the vicinity of the joint. Moreover, it decreased rapidly with the increase of the joint distance. While the distribution of axial force was relatively uniform in the end-anchored bolt.

Key words: tunnel engineering, anchorage mode, shear test, jointed rock mass, failure mode

中图分类号: 

  • TU 457

[1] 黄巍, 肖维民, 田梦婷, 张林浩, . 不规则柱状节理岩体力学特性模型试验研究[J]. 岩土力学, 2020, 41(7): 2349-2359.
[2] 陈虎, 叶义成, 王其虎, 胡南燕, 刘冉, 江慧敏. 基于岩梁−块体理论的巷道软弱层直接顶板 破坏形式研究[J]. 岩土力学, 2020, 41(4): 1447-1454.
[3] 樊科伟, 刘斯宏, 廖洁, 方斌昕, 王建磊, . 袋装石土工袋剪切力学特性试验研究[J]. 岩土力学, 2020, 41(2): 477-484.
[4] 闫超萍, 龙志林, 周益春, 旷杜敏, 陈佳敏, . 钙质砂剪切特性的围压效应和粒径效应研究[J]. 岩土力学, 2020, 41(2): 581-591.
[5] 王培涛, 黄正均, 任奋华, 章亮, 蔡美峰, . 基于3D打印的含复杂节理岩石直剪特性 及破坏机制研究[J]. 岩土力学, 2020, 41(1): 46-56.
[6] 何鹏飞, 马巍, 穆彦虎, 黄永庭, 董建华, . 黄土−砂浆块界面剪切特性试验及本构模型研究[J]. 岩土力学, 2019, 40(S1): 82-90.
[7] 韩钢, 周辉, 陈建林, 张传庆, 高阳, 宋桂红, 洪望兵, . 白鹤滩水电站层间错动带工程地质特性[J]. 岩土力学, 2019, 40(9): 3559-3568.
[8] 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.
[9] 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.
[10] 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.
[11] 胡田飞, 刘建坤, 王天亮, 岳祖润, . 粉质黏土变形特性的冻融循环效应及其双屈 服面本构模型[J]. 岩土力学, 2019, 40(3): 987-997.
[12] 张小燕, 蔡燕燕, 周浩燃, 杨 洋, 李玉龙, . 珊瑚砂大剪切应变下的剪切特性和分形维数[J]. 岩土力学, 2019, 40(2): 610-615.
[13] 柯志强, 王环玲, 徐卫亚, 林志南, 吉 华, . 含横向节理的柱状节理岩体力学特性试验研究[J]. 岩土力学, 2019, 40(2): 660-667.
[14] 孙钱程, 郑民总, 李邵军, 郭浩森, 程 远, 裴书锋, 江 权, . 柱状节理岩体隧洞松弛深度的 变异特性与确定方法[J]. 岩土力学, 2019, 40(2): 728-736.
[15] 崔凯, 冯飞, 谌文武, 汪小海, 程富强, . 生石灰为掺料的土遗址裂隙注浆浆液结石体 力学兼容性研究[J]. 岩土力学, 2019, 40(12): 4627-4636.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!