Experimental Study on Mechanical Behaviors ofEnd-anchored and Grouted Bolts

SONG Yang; ZHANG Xiang-dong; LI Qing-wen; ZHU Bai-ru

doi:10.3969/j.issn.1001-5485.2014.06.0152014, 31(06):73-77, 82

PDF(2747 KB)

Journal of Changjiang River Scientific Research Institute ›› 2014, Vol. 31 ›› Issue (6) : 73-77. DOI: 10.3969/j.issn.1001-5485.2014.06.0152014, 31(06):73-77, 82

ROCK-SOIL ENGINEERING

Experimental Study on Mechanical Behaviors ofEnd-anchored and Grouted Bolts

SONG Yang, ZHANG Xiang-dong, LI Qing-wen, ZHU Bai-ru

Author information +

History +

Abstract

In order to study the mechanical behaviors of anchorage segment of end-anchored and grouted bolts, we took cement water glass mortar end-anchored bolt body as research object and carried out repeated pull-out test in which dynamic load of small strain and high frequency is made equivalent to the load of high strain and low frequency. The test results show that the mode of dynamic load with small strain and high frequency is correct and reliable, and meets the requirements of the end-anchored model test. When the loading frequency is 430.882Hz, the stress and strain of end-anchor’s free deformation segment reach the maximum, and reach the minimum (approaching zero) far from the anchorage section. The axial stress distribution along the bolt is in approximation to the waveform between λ/2 wavelength of sine function. By analyzing the test results, we obtain the shear stress distribution along the bolt body, the displacement curve and the τ-u curve. The shear stress achieve the maximum at the anchorage deformation segment of end-anchor, and with the increase of the percentage and number of cyclic loading and unloading increment, the peak shear stress transmits and moves slowly to the bottom of the anchorage segment, eventually disenables the anchoring effect of anchored segment.

Key words

end-anchored and grouted bolts / loading mode / maximum anchor force / laboratory test

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

SONG Yang, ZHANG Xiang-dong, LI Qing-wen, ZHU Bai-ru. Experimental Study on Mechanical Behaviors ofEnd-anchored and Grouted Bolts[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(6): 73-77 https://doi.org/10.3969/j.issn.1001-5485.2014.06.0152014, 31(06):73-77, 82

References

[1] 高大水, 吴海斌, 王莉. 三峡船闸高边坡预应力锚索耐久性研究[J]. 岩土力学, 2005, 26(增2):126-135.(GAO Da-shui, WU Hai-bin, WANG Li. Research on Endurance of Prestressed Anchorage Cables in TGP Shiplock’s High Slope[J]. Rock and Soil Mechanics, 2005, 26(Sup.2):126-135. ( in Chinese))
[2] JARRED D J, HABERFIELD C M. Tendon/Grout Interface Performance in Grouted Anchors[C]∥Proceedings of Ground Anchorages and Anchored Structures. London: Thomas Telford, 1997: 256-263.
[3] KILIC A, YASAR E, ATIS C D. Effect of Bar Shape on the Pull-out Load Capacity of Fully Grouted Rock Bolt[J]. Tunnelling Underground Space Technology, 2002, 18(1):1-6.
[4] 秦强, 尹健民, 吴从清, 等. 锚杆声波反射法质量检测的模拟试验研究[J]. 长江科学院院报, 2011, 28(8):41-45. (QIN Qiang, YIN Jian-min, WU Cong-qing, et al. Simulation of the Application of Sonic Reflection Method in Rockbolt Anchorage Quality Detection[J]. Journal of Yangtze River Scientific Research Institute, 2011, 28(8):41-45.( in Chinese))
[5] 姚显春, 李宁, 陈蕴生, 等. 隧洞中全长黏结式锚杆的受力分析[J]. 岩石力学与工程学报, 2005, 24(13):2272-2276. (YAO Xian-chun, LI Ning, CHEN Yun-sheng, et al. Theoretical Solution for Shear Stresses on Interface of Fully Grouted Bolt in Tunnels[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(13):2272-2276. ( in Chinese))
[6] 肖国强, 吴基昌, 周黎明, 等. 锚杆质量无损检测中的缺陷信息提取方法研究[J]. 长江科学院院报, 2012, 29(11):73-76. (XIAO Guo-qiang, WU Ji-chang, ZHOU Li-ming, et al. Method of Extracting Defective Information in Non-destructive Detection of Anchor Quality[J]. Journal of Yangtze River Scientific Research Institute, 2012, 29(11):73-76. ( in Chinese))
[7] 赵林, 曾宪明, 李世民, 等. 优化复合锚固结构与单一锚固结构抗爆性能对比试验研究[J]. 岩土力学, 2011, 32(10):3019-3025. (ZHAO Lin, ZENG Xian-ming, LI Shi-min, et al. Comparative Test Study of Blast-resistance Performance of Optimal Composite Anchorage Structure and Single Anchorage Structure[J]. Rock and Soil Mechanics, 2011, 32(10):3019-3025. ( in Chinese))
[8] 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):1579-1586. (LI Shu-cai, ZHANG Ning, LV Ai-zhong, 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):1579-1586. (in Chinese))
[9] 赵明华, 王海波, 刘晓明, 等. 红层锚杆抗拔力学性质模型试验研究[J]. 湖南大学学报(自然科学版), 2013, 40(8):1-5. (ZHAO Ming-hua, WANG Hai-bo, LIU Xiao-ming, et al. Model Test Research on the Red Layer Anchors, Mechanical Properties of Pullout Resistance[J]. Journal of Hunan University(Natural Science), 2013, 40(8):1-5. (in Chinese))
[10]梁广昌. 简谐波作用下锚杆数值模拟分析[D]. 广州:广东工业大学, 2013. (LIANG Guang-chang. Numerical Simulation Analysis on the Anchor Bolts under Simple Harmonic Wave[D]. Guangzhou:Guangdong University of Technology, 2013. (in Chinese))