| 压力型锚杆力学性能模型试验研究 |
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| 引用本文： | 张永兴,卢黎,饶枭宇,李剑.压力型锚杆力学性能模型试验研究[J].岩土力学,2010,31(7):2045-2050. |
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| 作者姓名： | 张永兴 卢黎 饶枭宇 李剑 |
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| 作者单位： | 1. 重庆大学,土木工程学院,重庆,400045
2. 重庆交通科研设计院,重庆,400067 |
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| 基金项目： | 国家杰出青年科学基金，重庆市科委科技计划公关项目 |
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| 摘 要： | 为了研究在软质沉积岩条件下压力型锚杆的力学性能,进行了缩尺模型试验。设计的试验锚杆构造良好,模拟的承载体和无黏结形式简单可靠。通过设计不同的锚固段长度,试验获得了岩石条件下压力型锚杆的荷载-位移全曲线。与相同条件的普通拉力型锚索对比,压力型锚杆体现出优秀的抗拔极限承载力、良好的位移延性特征和残余强度;在归纳压力型锚杆破坏模式的基础上提出最佳锚固长度的基本范围,并按理论解进行了算例验证,计算结果与试验结果吻合良好。模型试验对压力型锚杆的力学性能进行了较深入探索,可供相关理论研究、科学试验和工程实践参考。
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| 关 键 词： | 压力型锚杆 模型试验 力学性能 最佳锚固长度 |
| 收稿时间： | 2009-07-17 |
Model test research on mechanical behavior of compression type rock bolt |
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| ZHANG Yong-xing,LU Li,RAO Xiao-yu,LI Jian.Model test research on mechanical behavior of compression type rock bolt[J].Rock and Soil Mechanics,2010,31(7):2045-2050. |
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| Authors: | ZHANG Yong-xing LU Li RAO Xiao-yu LI Jian |
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| Institution: | 1.College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. Chongqing Communications Research and Design Institute, Chongqing 400067, China |
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| Abstract: | Behavior of compression type rock bolt in soft sedimentary rock is studied by the scale model test in laboratory. Well-designed test rock bolts have good constructional detail of bearing plates and reliable unbonded steel strands. The full load-displacement curves are obtained by test rock bolts with different fixed anchor lengths. Compression type rock bolts show much higher ultimate bearing capacity，better ductility and residual strength than usual tension type rock bolts in the same condition. The test data accord with analytic solution. Optimum anchorage length is obtained based on failure patterns. The research is a good reference for related studies, tests and engineering practice. |
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| Keywords: | compression type rock bolt model test mechanical behavior optimum anchorage length |
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