预应力锚杆锚固止裂效应的试验研究

doi:10.13722/j.cnki.jrme.2015.0983

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Abstract Specimens with different angles of pre-existing fissures were made using the high-strength gypsum. The anchoring effect of the pre-stressed bolt on crack prevention was studied under uniaxial compression. The results showed that the elastic modulus，the crack initiation strength，the peak strength and the residual strength of anchored specimens increased to certain extent and increased with the increase of the pre-stress in bolt. The anchoring effect with the angle of 45 degree was more obvious than that of 30 degree and 60 degree. The pre-stressed bolt not only effectively restrained the separation of the failure planes of wing crack but also changed the expansion modes of the secondary crack. The change of the axial stress of bolt during the deformation of specimens was divided into four stages：the slow growth stage，the rapid growth stage，the sharp rising stage and the decelerated growth stage. The peak value of axial stress increased with the improvement of pre-stress of bolt. The anchoring mechanisms were analyzed with the theory of fracture mechanics. The role of the pre-stressed bolt played before peak strength was axial pressure and after peak strength was a combination of anti-shearing and axial pressure.

Key words： rock mechanics pre-stressed bolt anchoring effect on crack prevention anchoring mechanism

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.0983 OR http://www.rockmech.org/EN/Y2015/V34/I10/2027

[6]	李术才，张宁，吕爱钟，等. 单轴拉伸条件下断续节理岩体锚固效应试验研究[J]. 岩石力学与工程学报，2011，30(8)：1 579-1 586. (LI Shucai，ZHANG Ning，LU Aizhong，et al. Experimental study of anchoring effect of discontinuous jointed rock mass under uniaxial tension[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(8)：1 579-1 586.(in Chinese))
[12]	侯靖，张春生，单治钢. 锦屏二级水电站深埋引水隧洞岩爆特征及防治措施[J]. 地下空间与工程学报，2011，7(6)：1 251-1 257. (HOU Jing，ZHANG Chunsheng，SHAN Zhigang. Rockburst characteristics and the control measures in the deep diversion tunnel of Jinping II hydropower station[J]. Chinese Journal of Underground Space and Engineering，2011，7(6)：1 251-1 257.(in Chinese)) " target="_blank">
[14]	LAJTAI E Z. Brittle fracture in compression[J]. International Journal of Fracture，1974，10(4)：525-536. " target="_blank">
[15]	ASHBY M F，HALLAM S D. The failure of brittle solids containing small cracks under compressive stress states[J]. Acta Metallurgica，1986，34(3)：497-510. " target="_blank">
[17]	HORII H，NEMAT-NASSER S. Brittle failure in compression：splitting，faulting and brittle-ductile transition[J]. Philosophical Transactions of the Royal Society of London，1986，319(A)：337-374. " target="_blank">
[1]	朱维申，李术才，陈卫忠. 节理岩体破坏机理和锚固效应及工程应用[M]. 北京：科学出版社，2002：5-7.(ZHU Weishen，LI Shucai，CHEN Weizhong. Failure mechanism and anchoring effect of jointed rock masses and their application to engineering[M]. Beijing：Science Press，2002：5-7.(in Chinese)) " target="_blank">
[2]	李术才. 加锚断续节理岩体断裂损伤模型及其应用[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，1996.(LI Shucai. Anchored discontinuous jointed rockmass fracture-damage model and its application[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，1996.(in Chinese)) " target="_blank">
[3]	朱敬民，王林，顾金才，等. 岩石和锚杆组合材料力学性能的模拟试验研究[J]. 重庆建筑工程学院学报，1988，10(2)：11-18.(ZHU Jingmin，WANG Lin，GU Jincai，et al. Modelling study on mechanical behavior of complex material consisted of rock and rockbolts[J]. Journal of Chongqing Institute of Architecture and Engineering，1988，10(2)：11-18.(in Chinese))
[4]	葛修润，刘建武. 加锚节理面抗剪性能研究[J]. 岩土工程学报，1998，10(1)：8-19.(GE Xiurun，LIU Jianwu. Study on the shear resistance behavior of bolted rock joints[J]. Chinese Journal of Geotechnical Engineering，1998，10(1)：8-19.(in Chinese))
[7]	张宁，李术才，李明田，等. 单轴压缩条件下锚杆对含三维表面裂隙试样的锚固效应试验研究[J]. 岩土力学，2011，32(11)：3 288-3 294.(ZHANG Ning，LI Shucai，LI Mingtian，et al. Experimental study of reinforced effect of bolt in 3D surface fractured specimens under uniaxial compression[J]. Rock and Soil Mechanics，2011，32(11)：3 288-3 294.(in Chinese))
[9]	SPANG K，EGGER P. Action of fully grouted bolts in jointed rock and factors of influence[J]. Rock Mechanics and Rock Engineering，1990，23(3)：201-229. " target="_blank">
[10]	GRASSELLI G. 3D behavior of bolted rock joints：experimental and numerical study[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(1)：13-24. " target="_blank">
[11]	周辉，徐荣超，卢景景，等. 深埋隧洞板裂化围岩预应力锚杆锚固效应试验研究及机制分析[J]. 岩石力学与工程学报，2015，34(6)：1 081-1 090.(ZHOU Hui，XU Rongchao，LU Jingjing，et al. Experimental investigations and mechanism analysis of anchoring effect of pre-stressed bolts for slabbing surrounding rock in deep tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(6)：1 081-1 090.(in Chinese))
[13]	陈卫忠，李术才，朱维申，等. 岩石裂纹扩展的实验与数值分析研究[J]. 岩石力学与工程学报，2003，22(1)：18-23.(CHEN Weizhong，LI Shucai，ZHU Weishen，et al. Experimental and numerical research on crack propagation in rock under compression[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(1)：18-23.(in Chinese))
[16]	HORII H，NEMAT-NASSER S. Compression-induced microcrack growth in brittle solids：axial splitting and shear failure[J]. Journal of Geophysical Research：Solid Earth，1985，90(B4)：3 105-3 125. " target="_blank">
[19]	张伟，刘泉声. 基于剪切试验的预应力锚杆变形性能分析[J]. 岩土力学，2014，35(8)：2 231-2 240.(ZHANG Wei，LIU Quansheng. Analysis of deformation characteristics of prestressed anchor bolt based on shear test[J]. Rock and Soil Mechanics，2014，35(8)：2 231- 2 240.(in Chinese))
[5]	杨松林，徐卫亚，黄启平. 节理剪切过程中锚杆的变形分析[J]. 岩石力学与工程学报，2004，23(19)：3 268-3 273.(YANG Songlin，XU Weiya，HUANG Qipin. Analysis on the bolt deformation as result of joint shear displacement[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(19)：3 268-3 273.(in Chinese))
[8]	张波，李术才，杨学英，等. 含交叉裂隙节理岩体锚固效应及破坏模式[J]. 岩石力学与工程学报，2014，33(5)：996-1 003. (ZHANG Bo，LI Shucai，YANG Xueying，et al. Bolting effect and failure modes of jointed rock masses with cross-cracks[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(5)：996-1 003. (in Chinese))
[18]	STEIF P S. Crack extension under compressive loading[J]. Engineering Fracture Mechanics，1984，20(3)：463-473. " target="_blank">