压力分散型锚索锚固机制模型试验研究

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摘要采用新的试验装置和试验方法对锚索单元实施分级循环加载，通过地质力学模型试验研究压力分散型锚索的锚固机制。试验结果表明：2单元压力分散型锚索采用分级循环加载后，受承载体间距L等因素的影响，第1单元注浆体的应变和轴力随长度的衰减较第2单元快，加载后锚索各单元的应变分布、黏结应力均值呈现“前小后大”的分布模式；与前次加载相比，对3单元压力分散型锚索的第2，3级承载体加载到0.6 kN后，第1单元的应变和轴力峰值出现了不同程度的下降，加载单元及待加载单元的黏结应力均值均有所提高；对4单元压力分散型锚索采用分级循环加载后，加载单元及待加载单元的应变和轴力峰值、黏结应力均值有所提高，而已加载单元注浆体的应变和轴力峰值有所降低；在锚固长度一定的条件下，承载体的数量对荷载有效传递有相当大的影响，特别是黏结应力的转移方式不同。上述试验成果对正确分析压力分散型锚索加固作用机制和锚固工程设计具有较好的参考价值。

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	刘鸿
	周德培
	王志斌

关键词 ：岩土锚固, 压力分散型锚索, 模型试验, 锚固机制

Abstract：A new test device and a new test method are adopted to implement grading cyclic loading onto each anchor unit and study the anchoring and reinforcing mechanism of pressure diffusion anchor cable by geological mechanics model test. The test results show that：as far as the pressure diffusion anchor cable with two anchor units is concerned，the strain and axial force of the grouting body of the first unit are influenced by the distance between the bearings and attenuates faster than that of another unit，the mode of the strain distribution and the average bond stress distribution of the units are smaller in the front unit and bigger in the back unit after loading. For the pressure diffusion anchor cable with three anchor units，compared with the previous loading，the peak strain and axial force of the first unit fall with different levels after loading 0.6 kN onto the 2nd and 3rd units；and the average bond stresses of the loaded unit and unloaded unit are improved. For the pressure diffusion anchor cable with four anchor units，the peak strain and axial force and average bond stress of loading unit or unloaded unit have been improved，while the peak strain axial force and average bond stress of the loaded units reduce after grading cyclic loading. Under conditions of certain anchor length，the number of the bearing body has a considerable influence on the effective transfer of loads，especially the bond stress transfers in different ways. The experimental results have a good reference value for the correct analysis of anchoring and reinforcing mechanism and engineering design of the pressure diffusion anchor cable.

Key words： anchorages of rock and soil pressure diffusion anchor cable model test anchoring and reinforcing mechanism

引用本文:

刘鸿，周德培，王志斌. 压力分散型锚索锚固机制模型试验研究[J]. 岩石力学与工程学报, 2012, 31(S1): 3075-3081.
LIU Hong，ZHOU Depei，WANG Zhibin. MODEL TEST STUDY OF ANCHORING AND REINFORCING MECHANISM OF PRESSURE DIFFUSION ANCHOR CABLE. , 2012, 31(S1): 3075-3081.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2012/V31/IS1/3075

[1] 程良奎，李象范. 岩土锚固·土钉·喷射混凝土——原理、设计与应用[M]．北京：中国建筑工业出版社，2008：1–136.(CHENG Liangkui，LI Xiangfan. Principle，design of geotechnical anchorage，nail-soil，spraying concrete and their application[M]. Beijing：China Architecture and Building Press，2008：1–136.(in Chinese))

[2] 李海民，刘成洲，李鑫，等. 大吨位压力分散型锚索的设计与应用研究[J]. 岩石力学与工程学报，2002，21(增)：2 284–2 289.(LI Haiming，LIU Chengzhou，LI Xin，et al. Design research and application of large tonnage dispersed compressive stress anchoring cables[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(Supp.)：2 284–2 289.(in Chinese))

[3] 顾金才，沈俊，陈安敏，等. 锚索预应力在岩体内引起的应变状态模型试验研究[J]. 岩石力学与工程学报，2000，19(增1)：917–921.(GU Jincai，SHEN Jun，CHEN Anmin，et al. Model testing study of strain distribution regularity in rock mass caused by prestressed anchorage cable[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(Supp.1)：917–921.(in Chinese))

[4] 朱维申，张玉军，任伟中. 系统锚杆对三峡船闸高边坡岩体加固作用的块体相似模型试验研究[J]. 岩土力学，1996，17(2)：1–5.(ZHU Weishen，ZHANG Yujun，REN Weizhong. Similar model block tests for reinforcing effects of systematic bolts on rock mass of high slope of Three Gorges flight lock[J]. Rock and Soil Mechanics，1996，17(2)：1–5.(in Chinese))

[5] 张勇，许蔚峰，盛宏光，等. 张拉工艺对压力分散型锚索荷载不均匀系数的影响[J]. 岩石力学与工程学报，2009，28(增1)：2 954– 2 959.(ZHANG Yong，XU Weifeng，SHENG Hongguang，et al. Influence of stretching technology on load non uniform coefficient of pressure-dispersive anchor cable[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.1)：2 954–2 959.(in Chinese))

[6] 张勇，赵红玲，张向阳. 压力分散型锚索锚固段力学性能试验研究[J]. 岩石力学与工程学报，2010，29(增1)：3 052–3 056.(ZHANG Yong，ZHAO Hongling，ZHANG Xiangyang. Test study of mechanical performances of anchorage zone of pressure dispersion anchor cable style[J]. Chinese Journal of Rock mechanics and Engineering，2010，29(Supp.1)：3 052–3 056.(in Chinese))

[7] 夏元友，陈泽松，顾金才，等. 压力分散型锚索受力特点的室内足尺模型试验[J]. 武汉理工大学学报，2010，32(3)：33–37.(XIA Yuanyou，CHEN Zesong，GU Jincai，et al. Indoor full-size model test on stress features of pressure-dispersive prestressed anchorage cable[J]. Journal of Wuhan University of Technology，2010，32(3)：33–37.(in Chinese))

[8] 陈琛. 压力分散型锚索锚固机制及锚固段设计方法研究[硕士学位论文][D]. 武汉：武汉理工大学，2010.(CHEN Chen. Researching of anchoring mechanism and design method on anchorage section of pressure diffusion anchor cable[M. S. Thesis][D]. Wuhan：Wuhan University of Technology，2010.( in Chinese))

[9] 郑筱彦. 压力分散型锚索加固边坡效应研究[博士学位论文][D]. 武汉：武汉理工大学，2009.(ZHENG Xiaoyan. Research on anchored effect of pressure-dispersive prestressed anchorage cable on slope[Ph. D. Thesis][D]. Wuhan：Wuhan University of Technology，2009.(in Chinese))

[10] 曹兴松，周德培. 压力分散型锚索锚固段的设计方法[J]. 岩土工程学报，2005，27(9)：1 033–1 039.(CAO Xingsong，ZHOU Depei. Design method of fixed anchor unit for compression dispersion-type anchor[J]. Chinese Journal of Geotechnical Engineering，2005，27(9)：1 033–1 039.( in Chinese))

[11] 王建宇，牟瑞芳. 按共同变性原理计算地锚工程中黏结型锚头内力[C]// 第七次全国岩土锚固工程学术大会论文集. 北京：人民交通出版社，1998：52–62.(WANG Jianyu，MOU Ruifang. The internal force of the cohesive anchor head calculated by common deformation principle in geotechnical anchorage engineering[C]// Proceedings of the 7th National Academic Conference of Geotechnical Anchorage Engineering. Beijing：China Communications Press，1998：52–62.(in Chinese))