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双排桩加预应力锚索加固边坡锚索轴力地震响应特性研究

范刚, 张建经, 付晓, 吴金标, 田华

范刚, 张建经, 付晓, 吴金标, 田华. 双排桩加预应力锚索加固边坡锚索轴力地震响应特性研究[J]. 岩土工程学报, 2016, 38(6): 1095-1103. DOI: 10.11779/CJGE201606017
引用本文: 范刚, 张建经, 付晓, 吴金标, 田华. 双排桩加预应力锚索加固边坡锚索轴力地震响应特性研究[J]. 岩土工程学报, 2016, 38(6): 1095-1103. DOI: 10.11779/CJGE201606017
FAN Gang, ZHANG Jian-jing, FU Xiao, WU Jin-biao, TIAN Hua. Axial force of anchor cables in slope reinforced by double-row anti-slide piles and pre-stressed anchor cables[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(6): 1095-1103. DOI: 10.11779/CJGE201606017
Citation: FAN Gang, ZHANG Jian-jing, FU Xiao, WU Jin-biao, TIAN Hua. Axial force of anchor cables in slope reinforced by double-row anti-slide piles and pre-stressed anchor cables[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(6): 1095-1103. DOI: 10.11779/CJGE201606017

双排桩加预应力锚索加固边坡锚索轴力地震响应特性研究  English Version

基金项目: 交通运输部建设科技项目(2013318800020); 国家重点基础研究发展计划(“973”计划)项目(2011CB013605)
详细信息
    作者简介:

    范刚(1987- ),男,博士研究生,主要从事岩土工程抗震方面的研究。E-mail: fg113112@126.com。

Axial force of anchor cables in slope reinforced by double-row anti-slide piles and pre-stressed anchor cables

  • 摘要: 利用大型振动台,设计并进行了双排抗滑桩加预应力锚索加固边坡的模型试验,试验结果表明:锚索轴力的变化体现了坡体稳定性的发展过程,小震作用下锚索并未开始工作,在地震的扰动下所有锚索均出现预应力损失。随着输入地震波强度增大,坡肩部分出现局部失稳,锚索开始受力导致轴力增加,直至边坡整体出现失稳趋势,所有锚索均开始受力引起轴力增加,随后边坡与锚索形成新的平衡体系。在新的平衡体系下,锚索轴力在地震扰动作用下继续降低。试验中最大锚索预应力损失比例为16.28%,因此锚索预应力施加初始值应为设计值的1.2倍左右。坡腰抗滑桩以上#2锚索动态响应峰值较大,坡腰抗滑桩与坡脚抗滑桩之间7号锚索轴力动态响应峰值较大,#4,#5,#6号锚索轴力动态响应峰值随高程增加而增大。同一工况下坡面所有锚索轴力的动态响应峰值出现时间接近,且锚索轴力的动态响应峰值出现时间随着输入地震波强度的增大而提前,锚索轴力动态响应峰值出现时间在激励地震波的峰值时间附近。在预应力锚索抗震设计时应采用“分区设计”的思想,即根据不同区域内锚索的动态响应特征对边坡拟加固区域进行锚索设计分区,在不同分区内做针对性的锚索设计。
    Abstract: A large scale shaking table test on slope reinforced by double-row anti-slide piles and pre-stressed anchor cables is designed. The results show that change of axial force of anchor cables reflects the development of slope stability. Under the effect of small earthquake, the anchor cables do not start to work, and with the disturbance of earthquake, the prestress of pre-stressed anchor cables decreases. When the amplitude of input earthquake increases, because of the local instability in slope shoulder part, the anchor cables will begin to bear load and the axial force increases until the whole slope has instability trend. Under this condition, all the anchor cables will start to bear load and axial force increase, then a new balance will be developed and due to the disturbance of earthquake, the prestress of all anchor cables will continue to decrease in the new balance. In the test, the maximum prestress loss ratio is 16.28%, so the initial prestress value should be 1.2 times the designed value. In the part over the middle anti-slide pile, the peak value of dynamic response of anchor cable No. 2 is the largest. In the part between middle anti-slide pile and anti-slide pile in the toe of slope, the peak value of dynamic response of anchor cable No. 7 is the largest, and the peak values of anchor cables, No. 4, 5, 6 increase with the increasing elevation. Under the same loading condition, the occurrence time of peak of dynamic response value of all anchor cables is close, and it will be shorter when the input seismic wave amplitude increases. It is near that of input seismic wave. In the design process of pre-stressed anchor cables, the idea of zoning should be adopted, that is to say, the condition, the occurrence time of peak of dynamic response value of all anchor cables is close, and it will be shorter when the input seismic wave amplitude increases. It is near that of input seismic wave. In the design process of pre-stressed anchor cables, the idea of zoning should be adopted, that is to say, the design of the pre-stressed anchor cables in different zones should be based on the different dynamic response laws.
  • [1] KEEFER D K. Statistical analysis of an earthquake -induce landslide distribution: the 1989 Loma Prieta, California event[J]. Engineering Geology, 2000, 58(3/4): 231-249.
    [2] 高大水, 曾 勇. 三峡水久船闸高边坡锚索预应力状态监测分析[J]. 岩石力学与工程学报, 2001, 20(5): 653-656. (GAO Da-shui, ZENG Yong. Monitoring analysis of pre-stress state of anchor cable of high slope in the TGP Permanent ship locks[J]. Chinese Journal of Rock Mechanics and Engineering, 2001, 20(5): 653-656. (in Chinese))
    [3] 李 宁, 张 鹏, 于 冲, 等. 锦屏左岸拱肩槽边坡稳定性及预应力锚索加固措施研究[J]. 岩石力学与工程学报, 2007, 26(1): 36-42. (LI Ning, ZHANG Peng, YU Chong, et al. Research on stability of left abutment slope of Jinping Hydro-power Station and reinforcement measurements of pre-stressed anchorage cable[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(1): 36-42. (in Chinese))
    [4] 郑文博, 庄晓莹, 蔡永昌, 等. 地震作用下预应力锚索对岩石边坡稳定性影响的模拟方法及锚索优化研究[J]. 岩土工程学报, 2012, 34(9): 1668-1676. (ZHENG Wen-bo, ZHUANG Xiao-ying, CAI Yong-chang, et al. Modeling of pre-stressed anchors in rock slope under earthquake and optimization of anchor arrangement[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(9): 1668-1676. (in Chinese))
    [5] 卢萌盟, 卫明山, 沈 俊, 等. 全长黏结式预应力锚索加固基坑仿真试验研究[J]. 岩土工程学报, 2006, 28(1): 92-96. (LU Meng-meng, WEI Ming-shan, SHEN Jun, et al. Simulation tests on pit foundation reinforced by full-length- bonding pre-stressed cables[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(1): 92-96. (in Chinese))
    [6] 郑明新, 蒋新龙, 殷宗泽, 等. 预应力锚索抗滑桩工程效果的数值计算评价[J]. 岩土力学, 2007, 28(7): 1381-1386. (ZHENG Ming-xin, JIANG Xin-long, YIN Zong-ze, et al. Evaluation of effectiveness of pre-stressed anti-slide cable piles by numerical simulations[J]. Rock and Soil Mechanics, 2007, 28(7): 1381-1386. (in Chinese))
    [7] 邓东平, 李 亮, 赵炼恒, 等. 基于锈胀开裂的预应力锚杆(索)使用寿命预测研究[J]. 岩土工程学报, 2014, 36(8): 1464-1472. (DENG Dong-ping, LI Liang, ZHAO Lian-heng, et al. Prediction of service life of pre-stressed anchorage bolt (cable) due to corrosion expansion[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(8): 1464-1472. (in Chinese))
    [8] 韩 侃, 李登科, 吴冠仲. 预应力锚索锚固力拉拔试验分析[J]. 岩土工程学报, 2011, 33(增刊1): 387-389. (HAN Kan, LI Deng-ke, WU Guan-zhong. Pull-out tests on anchoring force of pre-stressed anchor cables[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(S1): 387-389. (in Chinese))
    [9] 杨苏杭, 梁 斌, 顾金才, 等. 锚固洞室抗爆模型试验锚索预应力变化特性研究[J]. 岩石力学与工程学报, 2006, 25(增刊2): 3749-3756. (YANG Su-hang, LIANG Bin, GU Jin-cai, et al. Research on characteristics of prestress change of anchorage cable in anti-expulsion model test of anchored cavern[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(S2): 3749-3756. (in Chinese))
    [10] 苏华友, 张继春. 紫坪铺进水口高陡边坡锚索抗爆破振动分析[J]. 岩石力学与工程学报, 2003, 22(11): 1916-1918. (SU Hua-you, ZHANG Ji-chun. Analysis of blasting vibration effect on pre-stressed cable of high slope in Zipingpu project[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(11): 1916-1918. (in Chinese))
    [11] 叶海林, 郑颖人, 李安洪, 等. 地震作用下边坡预应力锚索振动台试验研究[J]. 岩石力学与工程学报, 2012, 31(增刊1): 2847-2854. (YE Hai-lin, ZHENG Yin-ren, LI An-hong, et al. Shaking table test studies of pre-stressed anchor cable of slope under earthquake[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(S1): 2847-2854. (in Chinese))
    [12] 赖 杰, 郑颖人, 刘 云, 等. 地震作用下双排抗滑桩支护边坡振动台试验研究[J]. 岩土工程学报, 2014, 36(4): 680-686. (LAI Jie, ZHENG Ying-ren, LIU Yun, et al. Shaking table tests on double-row anti-slide piles of slopes under earthquakes[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(4): 680-686. (in Chinese))
    [13] 曲宏略, 张建经. 地基条件对挡土墙地震土压力影响的振动台试验研究[J]. 岩土工程学报, 2012, 34(7): 1228-1233. (QU Hong-lüe, ZHANG Jian-jing. Shaking table tests on influence of site conditions on seismic earth pressures of retaining wall[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(7): 1228-1233. (in Chinese))
    [14] 袁文忠. 相似理论与静力学模型试验[M]. 成都: 西南交通大学出版社, 1998: 112-119. (YUAN Wen-zhong. The similarity theory and static model test[M]. Chengdu: Southwest Jiaotong University Press, 1998: 112-119. (in Chinese))
    [15] 郑 静, 朱本珍. 边坡锚索结构的失效因素与破坏类型[J].铁道工程学报, 2010, 136(1): 10-13. (ZHENG Jing, ZHU Ben-zhen. Failure factor and failure damage type of slope anchor structure[J]. Journal of Railway Engineering Society, 2010, 136(1): 10-13. (in Chinese))
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出版历程
  • 收稿日期:  2015-04-21
  • 发布日期:  2016-06-24

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