聚酯锚杆与传统锚杆的力学性能及支护效果比较分析

郭震山; 郑俊杰; 崔岚; 章荣军

doi:10.11779/CJGE2015S1038

聚酯锚杆与传统锚杆的力学性能及支护效果比较分析 English Version

华中科技大学土木工程与力学学院,湖北武汉 430074

详细信息

作者简介:
郭震山(1990- ),男,硕士研究生,主要从事隧道数值模拟方面的研究工作。

通讯作者:
郑俊杰

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出版历程
- 收稿日期: 2015-03-25
- 发布日期: 2015-07-24

Comparative analysis of mechanical properties and support effects of polyester bolt and traditional steel bolt

School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China

摘要

摘要: 聚酯锚杆具有质轻、高强、耐腐蚀等优良特性,逐渐应用于边坡、隧道、地下硐室开挖及支护工程中。本文采用有限差分软件FLAC^3D,建立了聚酯锚杆与传统锚杆的拉拔试验模型,分析了两种锚杆在拉拔过程中的力学特性。以某山岭公路隧道为依托工程,重点研究了聚酯锚杆与传统锚杆在应变软化围岩隧道中的支护效果,根据围岩变形、塑性区域大小、支护受力及锚杆杆体屈服状态四个方面,对两种锚杆的计算结果进行了比较分析。研究结果表明：锚固长度达到一定值后,聚酯锚杆较传统锚杆表现出更好的拉拔性能;隧道埋深较大时,聚酯锚杆在控制围岩变形,限制塑性区发展,改善支护受力方面优于传统锚杆。
- 锚杆 /
- 有限差分法 /
- 拉拔试验 /
- 隧道
Abstract: Polyester bolt, which is lighter, stronger and shows better resistance to corrosion than the traditional steel bolt, has gradually been used in excavation and support of slope, tunnels and underground caverns. The finite difference software FLAC^3D is used to simulate the pull-out tests on the traditional steel bolt and polyester bolt. The mechanical responses of the bolts during the pull-out process are analyzed. The support effects of the two bolts in strain-softening surrounding rock are studied, and the calculated results are compared based on the deformation of surrounding rock, area of plastic zone, stress in preliminary support structure and yield state of bolts. The results show that as the anchorage length approaches a certain value, compared with the traditional steel bolt, the polyester bolt can sustain larger pull force; while the tunnel is further excavated, the polyester bolt has an advantage over the traditional steel bolt in controlling the rock deformation, and the plastic zone and reducing the pressure on the preliminary support.
- anchor rod /
- finite difference method /
- pull-out test /
- tunnel

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参考文献(10)

[1]	BENMOKRANE B, ZHANG B R, CHENNOUF A. Tensile properties and pullout behavior of AFRP and CFRP rods for grouted anchor applications[J]. Construction and Building Materials, 2000, 14(3): 157-170.
[2]	JAVIER M L. Tensile and bond properties of GFRP reinforcing bars[J]. ACL, Materials Journal, 1995, 92(3): 276-285.
[3]	刘汉东, 于新政, 李国维. GFRP锚杆拉伸力学性能试验研究[J]. 岩石力学与工程学报, 2005, 24(20): 3719-3723. (LIU Han-dong, YU Xin-zheng, LI Guo-wei. Experimental study on tensile mechanical properties of glass fiber reinforced plastic rebar[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(20): 3719-3723. (in Chinese))
[4]	闫富有, 贾新, 袁勇. 砂浆黏结GFRP锚杆试验研究[J]. 工业建筑, 2004, 34(12): 59-97. (YAN Fu-you, JIA Xin, YUAN Yong. Experimental on the bonding behavior of GFRP bolts with mortar[J]. Industrial Construction, 2004, 34(12): 59-97. (in Chinese))
[5]	黄蕾鸣, 黄志怀, 李维朝, 等. GFRP筋材替代钢材锚固高边坡应用试验[J]. 中外公路, 2005, 6(25): 144-147. (HUANG Lei-ming, HUANG Zhi-huai, LI Wei-chao, et al. Experimental on GFRP bolt anchored in high slop[J]. Journal of China & Foreign Highway, 2005, 6(25): 144-147. (in Chinese))
[6]	李国维, 刘朝权, 黄志怀, 等. 应用玻璃纤维锚杆加固公路边坡现场试验[J]. 岩石力学与工程学报, 2010, 30(增刊2): 4056-4062. (LI Guo-wei, LIU Chao-quan, HUANG Zhi-huai, et al. In-situ test of glass fiber reinforced polymer anchor on highway slope reinforcement[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 30(S2): 4056-4062. (in Chinese))
[7]	贾新. 玻璃纤维增强塑料锚杆锚固机理研究[D]. 上海:同济大学, 2005. (JIA Xin. Research on bond mechanism of GFRP bolt[D]. Shanghai: Tongji University, 2005. (in Chinese))
[8]	郭树宇. 黏结型锚杆拉拔承载力的试验与理论分析[D]. 大连: 大连理工大学, 2008. (GUO Shu-yu. Experimental and analytical study on pull-out resistance of adhesive anchors[D]. Dalian: Dalian University of Technology, 2008. (in Chinese))
[9]	杨超, 崔新明, 徐水平. 软岩应变软化数值模型的建立与研究[J]. 岩土力学, 2002, 23(6): 695-697+701. (YANG Chao, CUI Xin-ming, XU Shui-ping. Establishment and study of strain-softening numerical constitutive model for soft rock[J]. Rock and Soil Mechanics, 2002, 23(6): 695-697+701. (in Chinese))
[10]	周家文, 徐卫亚, 李明卫, 等. 岩石应变软化模型在深埋隧洞数值分析中的应用[J]. 岩石力学与工程学报, 2009, 28(6): 1116-1127. (ZHOU Jia-wen, XU Wei-ya, LI Ming-wei, et al. Application of rock strain softening model to numerical analysis of deep tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(6): 1116-1127. (in Chinese))