Stress Analysis of Full-Length Bond Bolt Considering Shear Deformation of Grouting Layer

  • Shu Xiaoyun ,
  • Zhu Zhende ,
  • Li Anrun ,
  • Tian Yun
Expand
  • 1. College of Civil and Transportation Engineering, Hohai University, Nanjing 210024, P.R. China;
    2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, P.R. China;
    3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, P.R. China;
    4. Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Shaoxing University, Shaoxing, Zhejiang 312000, P.R. China

Received date: 2023-10-11

  Online published: 2024-07-15

Abstract

Bolt anchoring force is closely related to the anchor shear properties of interface. Considering the shear properties of grouting and contact interface bonding behavior, the shear stress distribution of full-length bond bolt is analyzed based on the stress-strain relationship between bolt, grouting, surrounding rock and bond interface. In this case, both grouting-surrounding rock interface and the anchor axial force are obtained respectively under drawing. The results show that: The peak shear stress of the interface considering the shear deformation of grouting is significantly lower than that without consideration when the drawing force is applied. With the elastic modulus of surrounding rock increasing, the difference of peak shear stress is decreasing as well, and the value can be chosen as 30% under the hard rock condition. Under the soft rock condition, the peak interface shear stress is lower, with its distribution large, indicating that the long bolt should be chosen under the condition of soft rock. With the elastic modulus of surrounding rock increasing, the distribution of interface shear stress is decreasing, with peak shear stress moved towards to bolt head, indicating that the short bolt should be chosen and the interface shear strength should be improved under the condition of hard rock.

Cite this article

Shu Xiaoyun , Zhu Zhende , Li Anrun , Tian Yun . Stress Analysis of Full-Length Bond Bolt Considering Shear Deformation of Grouting Layer[J]. Chinese Journal of Underground Space and Engineering, 2024 , 20(3) : 757 -766 . DOI: 10.20174/j.JUSE.2024.03.06

References

[1]尤春安.全长粘结式锚杆的受力分析[J].岩石力学与工程学报,2000, 19(3):339-341. (You Chunan. Mechanical analysis on wholly grouted anchor[J]. Chinese Journal of Rock Mechanics and Engineering, 2000, 19(3): 339-341. (in Chinese))
[2]尤春安.锚固系统应力传递机理理论及应用研究[J].岩石力学与工程学报,2005, 24(7):1272. (You Chunan. Theory and application study on stress-transfer mechanism of anchoring system[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(7): 1272. (in Chinese))
[3]曹国金,姜弘道,熊红梅.一种确定拉力型锚杆支护长度的方法[J].岩石力学与工程学报,2003, 22(7):1141-1145. (Cao Guojing, Jiang Hongdao, Xiong Hongmei. Calculation method of support length for stretched bolts[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(7): 1141-1145. (in Chinese))
[4]赵一鸣.煤矿巷道树脂锚固体力学行为及锚杆杆体承载特性研究[J].煤炭学报,2012,37(8):1423-1424. (Zhao Yiming. Study on mechanical behavior of epoxy bonded bolt system and bolt bearing characteristic in coal mine roadway[J]. Journal of China Coal Society, 2012, 37(8): 1423-1424. (in Chinese))
[5]何思明,田金昌,周建庭.胶结式预应力锚索锚固段荷载传递特性研究[J].岩石力学与工程学报,2006, 25(1):117-121. (He Siming, Tian Jingchang, Zhou Jianting. Study on load transfer of bond prestressed anchor rope[J].Chinese Journal of Rock Mechanics and Engineering, 2006, 25(1): 117-121. (in Chinese))
[6]何思明,张小刚,王成华.基于修正剪切滞模型的预应力锚索作用机理研究[J].岩石力学与工程学报,2004, 23(15):2562-2567. (He Siming, Zhao Xiaogang, Wang Chenghua. Study on mechanism of prestressed anchoring cable based on modified shear lag model [J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(15): 2562-2567. (in Chinese))
[7]Farmer I W. Stress distribution along a resin grouted rock anchor[J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts,1975,12(11): 347-352.
[8]Delhomme F, Debicki G. Numerical modelling of anchor bolts under pullout and relaxation tests[J]. Construction and Building Materials,2009,24(7): 1232-1238.
[9]张季如,唐保付.锚杆荷载传递机理分析的双曲函数模型[J].岩土工程学报,2002, 24(2):188-192. (Zhang Jiru, Tang Baofu. Hyperbolic function model to analyze load transfer mechanism on bolts[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(2): 188-192. (in Chinese))
[10]蒋忠信.拉力型锚索锚固段剪应力分布的高斯曲线模式[J].岩土工程学报,2001, 23(6):696-699. (Jiang Zhongxin. A Gauss curve model on shear stress along anchoring section of anchoring rope of extensional force type [J]. Chinese Journal of Geotechnical Engineering, 2001, 23(6):696-699. (in Chinese))
[11]Freeman T J. The behavior of fully-bonded rock bolts in the Kielder experimental tunnel [J]. Tunnels and Tunnelling, 1978, 10(5):37-40.
[12]李英明,赵呈星,丛利,等.基于实际围岩变形的全长锚固锚杆杆体应力分布特征分析[J].煤炭学报,2019,44(10):2966-2973. (Li Yingming, Zhao Chengxing, Cong Li, et al. Analysis of stress distribution characteristics of fully anchored bolt based on actual surrounding rock deformation[J].Journal of China Coal Society,2019,44(10) : 2966-2973. (in Chinese))
[13]Tao Z,Chen J X. Behavior of rock bolting as tunneling support [A]// Proceedings of the International Symposium on Rock Bolting[C]. Rotterdam:Balkema,1984:87-92.
[14]Cai Y, Esaki T, Jiang Y J. An analytical model to predict axial load in grouted rock bolt for soft rock tunnelling[J].Tunnelling and Underground Space Technology incorporating Trenchless Technology Research,2004,19(6) :607-618.
[15]伍国军,褚以惇,陈卫忠,等.地下工程锚固界面力学模型及其时效性研究[J].岩土力学,2011,32(1):237-243. (Wu Guojun, Chu Yidun, Chen Weizhong, et al. Constitutive model of anchorage interface in underground engineering and its time-effect analysis[J]. Rock and Soil Mechanics, 2011, 32(1): 237-243. (in Chinese))
[16]李冲,徐金海,李明.全长锚固预应力锚杆杆体受力特征分析[J].采矿与安全工程学报,2013,30(2):188-193. (Li Chong, Xu Jinhai, Li Ming. The mechanical characteristics analysis of fully anchored pre-stressed bolts in coal mines[J]. Journal of Mining and Safety Engineering, 2013, 30(2): 188-193. (in Chinese))
[17]王明恕,何修仁,郑雨天.全长锚固锚杆的力学模型及其应用[J].金属矿山,1983(4):24-29. (Wang Mingshu, He Xiuren, Zheng Yutian. Mechanical model of full-length anchoring bolt and its application[J]. Metal Mine,1983(4):24-29. (in Chinese))
[18]宋义敏,邓琳琳,吕祥锋,等.锚杆拉拔过程中锚固体系传力规律研究[J].采矿与安全工程学报,2018,35(6):1122-1128. (Song Yiming, Deng Lingling, Lü Xiangfang, et al. Study on force transfer law of anchoring system in bolt drawing process[J]. Journal of Mining & Safety Engineering, 2018,35(6):1122-1128. (in Chinese))
[19]柴敬,赵文华,李毅,等.光纤光栅检测的锚杆拉拔实验研究[J].中国矿业大学学报,2012,41(5):719-724. (Chai Jing, Zhao Wenhua, Li Yi, et al. Pull out tests of fiber bragg grating sensor fitted bolts[J]. Journal of China University of Mining & Technology, 2012, 41(5): 719-724. (in Chinese))
[20]陆士良,汤雷,杨新安. 锚杆锚固力与锚固技术[M]. 北京:煤炭工业出版社,1998. (Lu Shiliang, Tang Lei, Yang Xingan. Bolt anchoring force and anchoring technology[M]. Beijing: China Coal Industry Publishing Home, 1998. (in Chinese))
[21]马海春,崔可锐,钱家忠,等.压力型锚杆抗拔能力模拟实验研究[J].地下空间与工程学报,2016,12(4):963-967.(Ma Haichun,Cui Kerui,Qian Jiazhong,et al.Research on pullout simulation experiments of pressure-type anchoring rock bolts[J].Chinese Journal of Underground Space and Engineering,2016,12(4):963-967.(in Chinese))
[22]查文华,王澄菡,梁译文,等.新型拉力分散型麻花锚杆锚固性能试验研究[J].地下空间与工程学报,2022,18(增2):696-701.(Zha Wenhua,Wang Chenghan,Liang Yiwen,et al.Experimental study on anchorage performance of new tension dispersed twist bolt[J].Chinese Journal of Underground Space and Engineering,2022,18(Supp.2):696-701.(in Chinese))
[23]Zhu Z D, Shu X Y, Li Z, et al. Stress analysis of full-length grouted bolt under shear deformation of anchor interface [J]. Journal of Mountain Science, 2022, 19(11): 3286-3301.
[24]王晓卿,杨景贺,李建忠,等.考虑脱锚的全长锚固锚杆典型工况力学特性分析[J].煤炭学报,2020,45(增2): 599-608. (Wang Xiaoqing, Yang Jinghe, Li Jianzhong, et al. Mechanical characteristics analysis of full-length anchoring bolt under typical working conditions considering anchor removal[J]. Journal of China Coal Society, 2020,45(Supp.2): 599-608. (in Chinese))
[25]王辉,郭院成.基于突变理论的单根锚杆脱黏分析[J].岩土力学,2016,37(10):2833-2838. (Wang Hui, Guo Yuancheng. Debonding analysis of a single anchor using catastrophe theory[J]. Rock and Soil Mechanics, 2016, 37(10): 2833-2838. (in Chinese))
[26]李建林. 岩石力学[M].重庆:重庆大学出版社:高等学校土木工程本科指导性专业规范配套系列教材, 2014. (Li JianLing. Rock mechanics[M]. Chongqing: Chongqing University Press: College Civil Engineering Undergraduate Instructional Professional Standard Supporting Series of Textbooks, 2014. (in Chinese))
[27]朱训国. 地下工程中注浆岩石锚杆锚固机理研究[D].大连:大连理工大学,2007. (Zhu Xunguo. Study on anchoring mechanism of grouted rock bolt in underground engineering[D]. Dalian: Dalian University of Technology, 2007. (in Chinese))
[28]朱珍德,舒晓云,陈卫忠,等.一种改进的中空注浆锚杆连接段螺纹参数优化分析[J].煤炭学报,2022,47(6):2300-2310. (Zhu Zhende, Shu Xiaoyun, Chen Weizhong, et al. Optimization analysis of thread parameters in connection section of an improved hollow grouting bolt[J]. Journal of China Coal Society, 2022, 47(6): 2300-2310. (in Chinese))
Outlines

/