压力型锚索承载板前砂浆体破坏机制试验研究

卢黎; 黎亮; 邓宇; 胡天时; 李宵潇

压力型锚索承载板前砂浆体破坏机制试验研究 English Version

卢黎^{1, 2},
黎亮¹,
邓宇¹,
胡天时¹,
李宵潇¹

1. 重庆大学土木工程学院,重庆 400045; 2. 重庆大学山地城镇建设与新技术教育部重点实验室,重庆 400045

基金项目: 重庆大学中央高校基本科研业务费科研专项资助项目（CDJZR11 20 00 11）

详细信息

作者简介:
卢黎（1977- ），男，重庆人，博士，副教授，硕士生导师，主要从事岩土锚固、山区地基基础方面的研究与教学工作。E-mail: lulicq@126.com。

中图分类号: TU47
计量
- 文章访问数: 316
- HTML全文浏览量: 1
- PDF下载量: 435
出版历程
- 收稿日期: 2013-04-11
- 发布日期: 2013-11-19

Failure mechanism of mortar in front of bearing plate of compression type anchor cables

1. College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. Key Laboratory of New Technique for Construction of Cities in Mountain Area of Ministry of Education, Chongqing University, Chongqing 400045, China

摘要

摘要: 压力型锚索承载板前砂浆体抗压承载力是影响压力型锚索整体有效性的重要因素之一。为了研究砂浆体的强度,设计了一个自适应多向应力加载装置,在单向试验机上按实际受力条件模拟了锚固砂浆体的受压破坏过程。带孔圆柱形砂浆体的配合比、尺寸和开孔基本按实际条件制作,根据相关理论和试验研究,确定了试件侧表面上正应力和剪应力的取值范围,以此为依据对受压试件施加侧向正应力和剪应力,得到了多组试件的抗压强度和应力应变关系,分析了试件的破坏形态。试验结果表明,砂浆体在侧向压力和表面剪应力共同作用下,其受力情况比单轴条件下更好,抗压强度有明显提高,提出了经验公式用于计算这种有利作用。公式的预测结果与现场试验结果进行了对比,提出了岩石强度与侧向压力对应关系的建议。
- 压力型锚索 /
- 砂浆 /
- 受压破坏
Abstract: The overall capacity of compression type anchor cables is influenced by the compression capacity of the mortar in front of bearing plate. For assessing the capacity of the mortar, the compression failure process of anchoring mortar under actual stresses is simulated by a self-adaptable multiaxial stress loading device on a uniaxial test machine. The mixture ratios, proportions and holes of cylindrical mortar specimens are made according to engineering conditions. The normal and tangential stresses decided by theoretical and experimental researches are exerted on the side face of the mortar. The compressive strengths, stress-strain curves and failure patterns of mortar specimens are obtained by the tests. The results show that the compressive strengths of the mortar are enhanced by the lateral normal and tangential stresses. By comparing laboratory experiment with field test results, empirical formulas for predicting the enhancement effect and the empirical relationship of rock compressive strength and lateral stresses are suggested.
- compression type rock anchor cable /
- mortar /
- compression failure

HTML全文

参考文献(14)

[1]	尤春安. 压力型锚索锚固段的受力分析[J]. 岩土工程学报, 2004, 26(6): 828-831. (YOU Chun-an. Mechanical analysis of anchorage segment of pressure-type cable[J]. Chinese Journal of Geotechnical Engineering, 2004, 26(6): 828-831. (in Chinese))
[2]	杨庆, 朱训国, 栾茂田. 压力型锚索锚固段应力分布及影响参数分析[J]. 岩石力学与工程学报, 2006, 25(增刊2): 4065-4070. (YANG Qing, ZHU Xun-guo, LUAN Mao-tian. Analysis of stress distribution and influential parameters of anchorage segment of pressure-type cable[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(S2): 4065-4070. (in Chinese))
[3]	金永军, 何满潮, 王树仁, 等. 适用于软岩边坡加固的压力分散型预应力锚索锚固机制研究[J]. 土木工程学报, 2006, 39(4): 63-67. (JIN Yong-jun, HE Man-chao, WANG Shu-ren, et al. Study on the anchoring mechanism of pre-stressed anchor cable with dispersive pressure suitable for soft-rock slope reinforcing[J]. China Civil Engineering Journal, 2006, 39(4): 63-67. (in Chinese))
[4]	芮瑞, 夏元友, 顾金才, 等. 压力分散型锚索锚固段受力特性试验分析[J]. 岩土工程学报, 2012, 34(5): 917-923. (RUI Rui-, XIA Yuan-You, GU Jin-Cai, et al. Field test and mechanical analysis of anchorage segment of pressure-dispersion anchors[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(5): 917-923. (in Chinese))
[5]	王虎法. 压力分散型锚索现场抗拔试验测试与分析[J]. 探矿工程, 2007(6): 47-49. (WANG Hu-fa. In situ pull-out test and analysis on the new anchor cable with scattered compression force[J]. Exploration Engineering, 2007(6): 47-49. (in Chinese))
[6]	张四平, 候庆. 压力分散型锚杆剪应力分布与现场试验研究[J]. 重庆建筑大学学报, 2004, 26(2): 41-47. (ZHANG Si-ping, HOU Qing. Study on shear stress distribution and in-situ test of pressure-dispersive anchor[J]. Journal of Chongqing Jianzhu University, 2004, 26(2): 41-47. (in Chinese))
[7]	杨雪林, 林国潘. 压力分散型锚索的基本试验及分析[J]. 福建建筑, 2008(4): 99-102. (YANG Xue-lin, LIN Guo-pan. The fundamental trial and analysis of pressure-dispersed anchor cable[J]. Fujian Architecture & Construction, 2008(4): 99-102. (in Chinese))
[8]	张四平, 陈超. 基于岩层的压力型锚杆抗拔试验研究[J]. 重庆建筑大学学报, 2003, 25(3): 22-25. (ZHANG Si-ping, CHEN Chao. Study on pull - out tests of pressure type anchor in rock[J]. Journal of Chongqing Jianzhu University, 2003, 25(3): 22-25. (in Chinese))
[9]	夏元友, 范卫琴, 芮瑞. 压力分散型锚索作用效果的数值模拟分析[J]. 岩土力学, 2008, 29(11): 3144-3148. (XIA Yuan-you, FAN Wei-qin, RUI Rui. Numerical simulation analysis of pressure diffusion anchor cable’s effect mechanism[J]. Rock and soil Mechanics, 2008, 29(11): 3144-3148. (in Chinese))
[10]	庞有师, 刘汉龙, 陈育民. 可回收式锚杆拉拔试验的数值模拟与影响因素分析[J]. 解放军理工大学学报(自然科学版), 2009, 10(2): 170-174. (PANG You-shi, LIU Han-long, CHEN Yu-min. Numerical simulation of removable anchor pullout test and influence factors[J]. Journal of PLA University of Science and Technology(Natural Science Edition), 2009, 10(2): 170-174. (in Chinese))
[11]	饶枭宇, 唐树名, 张永兴, 等. 注浆体配合比改善岩锚抗拔特性的试验研究[J]. 岩石力学与工程学报, 2008, 27(2): 390-396. (RAO Xiao-yu, Tang Shu-ming, ZHANG Yong-xing, et al. Experimental study on mixture ratios of grouting material for improvement of pull-out behaviors of rock cables[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(2): 390-396. (in Chinese))
[12]	卢黎, 张永兴, 吴曙光. 压力型锚杆锚固段的应力分布规律研究[J]. 岩土力学, 2008, 29(6): 1517-1520. (LU Li, ZHANG Yong-xing, WU Shu-guang. Distribution of stresses on bonded transmission length of compression type rock bolt[J]. Rock and soil Mechanics, 2008, 29(6): 1517-1520. (in Chinese))
[13]	卢黎, 张四平, 张永兴. 压力型锚索力学机理现场试验研究[J]. 岩土力学, 2010, 31(8): 2435-2440. (LU Li, ZHANG Si-ping, ZHANG Yong-xing. On-situ test and behavior analysis of compression type rock anchor cables[J]. Rock and soil Mechanics, 2010, 31(8): 2435-2440. (in Chinese))
[14]	卢黎, 张永兴, 张四平. 软质岩中压力型锚索锚固段应力分布特征[J]. 土木建筑与环境工程, 2011, 33(5): 69-74. (LU Li, ZHANG Yong-xing, ZHANG Si-ping. Stress distribution in fixed anchor length of compression type anchor in soft rock mass[J]. Journal of Civil, Architectural & Environmental Engineering, 2011, 33(5): 69-74. (in Chinese))