前后排抗滑桩加固滑坡桥基的振动台试验研究

doi:10.13722/j.cnki.jrme.2017.0138

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (704 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要设计并完成前后排抗滑桩加固滑坡桥基的振动台模型试验。通过输入不同频率、加速度峰值的正弦波，分析振动时桥墩基桩、抗滑桩的受力变形规律，以及PGA放大系数变化特性。试验结果显示，当滑体为可塑的粉质黏土时，后排抗滑桩桩后土压力峰值分布随台面加速度峰值变化，由三角形逐渐变为倒三角形；由于桥墩、后排抗滑桩间距很小，两者相互作用增强，桥墩基桩受到较大的动力荷载影响，随着台面振动加速度峰值增加，桥墩基桩的应变最大值从桩顶下移至滑面附近；当正弦波加速度峰值相等时，频率越高，土体黏滞阻尼越小，滑坡的PGA放大系数越大，相应云图呈层状分布，同时高频振动波使土体产生较小的位移和变形，导致滑坡推力也较小；振动波在向上传播时，土体存在滤波效应，自振频率附近的频谱幅值会被放大。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	雷达1
	2
	蒋关鲁1
	2
	刘伟豪1
	2
	戚志慧1
	2
	王智猛3

关键词 ：土力学, 抗滑桩, 桥梁基础, 振动台模型试验, PGA放大系数

Abstract：This paper presents a shaking table test on slope foundation of bridge reinforced by two rows of anti-slide piles. The dynamic loading applied is the sine waves with different frequencies and peak accelerations. The mechanical responses of the bridge foundation and anti-slide piles and the variation of amplification coefficient of PGA are analyzed. The results show that the distribution of peak soil pressure behind the back row anti-slide piles changes with the peak acceleration of shaking table in plastic silty clay. Due to the small distance between the bridge pier and back row anti-slide piles，the dynamic load affects the bridge foundation greatly，and the maximum strain of bridge pile foundation moves from the pile top to the sliding surface in the loading process. When the peak accelerations of sine waves are the same，the higher frequency of vibration means the smaller of viscous damping and the larger of PGA amplification coefficient in soil. The PGA amplification coefficient of the slope is distributed in layers. Meanwhile，the vibration waves of high frequency cause the smaller displacement and deformation in soil and lead to a smaller landslide thrust. When the vibration waves propagate up in soil，the spectrum of amplitude is magnified near the natural vibration frequency due to the filtering effect.

Key words： soil mechanics anti-slide pile bridge foundation shaking table model test PGA amplification coefficient

引用本文:

雷达1，2，蒋关鲁1，2，刘伟豪1，2，戚志慧1，2，王智猛3. 前后排抗滑桩加固滑坡桥基的振动台试验研究[J]. 岩石力学与工程学报, 2017, 36(9): 2297-2304.
LEI Da1，2，JIANG Guanlu1，2，LIU Weihao1，2，QI Zhihui1，2，WANG Zhimeng3. Shaking table test on slope foundation of bridge reinforced with two rows of anti-slide piles. , 2017, 36(9): 2297-2304.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.0138 或 http://www.rockmech.org/CN/Y2017/V36/I9/2297

[3]	KOBAYASHI H，TAMURA K，TANIMOTO S. Hybrid vibration experiments with a bridge foundation system model[J]. Soil Dynamics and Earthquake Engineering，2002，22(9/12)：1 135-1 141. " target="_blank">
[2]	SZAVITS N A，NOSSAN SZAVITS V，STANIC B，et al. A bridge foundation resisting sliding soil mass[C]// Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering：The Academia and Practice of Geotechnical Engineering. Alexandria，Egypt：IOS Press，2009：1 495-1 498. " target="_blank">
[7]	晏应. 斜坡桥梁桩的基础加固优化技术研究[J]. 交通标准化，2013，(6)：84-86.(YAN Ying. Reinforcement and optimization technology of foundation about slope bridge pile[J]. Transportation Standardization，2013，(6)：84-86.(in Chinese))
[8]	杜修力，李霞，陈国兴，等. 悬挂式层状多向剪切模型箱的设计分析及试验验证[J]. 岩土工程学报，2012，34(3)：424-432.(DU Xiuli，LI Xia，CHEN Guoxing，et al. Design and test verification of suspension multidirectional laminar shear model box[J]. Chinese Journal of Geotechnical Engineering，2012，34(3)：424-432.(in Chinese))
[6]	中华人民共和国行业标准编写组. TB 10002.5—2005 铁路桥涵地基和基础设计规范[S]. 北京：中国铁道出版社，2005.(The Professional Standards Compilation Group of People?s Republic of China. TB 10002.5—2005 Code for design on subsoil and foundation of railway bridge and culvert[S]. Beijing：China Railway Press，2005.(in Chinese)) " target="_blank">
[10]	凌贤长，郭明珠，王东升，等. 液化场地桩基桥梁震害响应大型振动台模型试验研究[J]. 岩土力学，2006，27(1)：7-11.(LING Xianzhang，GUO Mingzhu，WANG Dongsheng，et al. Large-scale shaking table model test of seismic response of bridge of pile foundation in ground of liquefaction[J]. Rock and Soil Mechanics，2006，27(1)：7-11.(in Chinese))
[11]	唐亮，凌贤长，徐鹏举，等. 可液化场地桥梁群桩独柱墩结构地震反应振动台试验研究[J]. 土木工程学报，2009，42(11)：102-108.(TANG Liang，LING Xianzhang，XU Pengju，et al. Shaking table tests for seismic response of pile-supported bridge structure with single-column pier in liquefiable ground[J]. China Civil Engineering Journal，2009，42(11)：102-108.(in Chinese))
[12]	徐光兴，姚令侃，高召宁，等. 边坡动力特性与动力响应的大型振动台模型试验研究[J]. 岩石力学与工程学报，2008，27(3)：624-632.(XU Guangxing，YAO Lingkan，GAO Zhaoning，et al. Large- scale shaking table model test study on dynamic characteristics and dynamic responses of slope[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(3)：624-632.(in Chinese))
[4]	蔺鹏臻，武发辉，杨子江. 考虑边坡效应的桥梁桩基受力分析[J]. 中国铁道科学，2016，37(4)：54-60.(LIN Pengzhen，WU Fahui，YANG Zijiang. Mechanics analysis of bridge pile foundation considering slope effect[J]. China Railway Science，2016，37(4)：54-60.(in Chinese))
[5]	龚先兵，杨明辉，赵明华，等. 山区高陡横坡段桥梁桩基承载机理模型试验[J]. 中国公路学报，2013，26(2)：56-62.(GONG Xianbing，YANG Minghui，ZHAO Minghua，et al. Load-bearing mechanism model test for bridge pile foundation in high-steep transverse slope[J]. China Journal of Highway and Transport，2013，26(2)：56-62.(in Chinese))
[9]	袁林娟，刘小生，汪小刚，等. 振动台土-箱结构模型动力特性及反应的解析分析[J]. 岩土工程学报，2012，34(6)：1 038-1 042. (YUAN Linjuan，LIU Xiaosheng，WANG Xiaogang，et al. Analytic solution of dynamic characteristics and responses of soil-box model for shaking table tests[J]. Chinese Journal of Geotechnical Engineering，2012，34(6)：1 038-1 042.(in Chinese))
[1]	宋晓东，李建中. 山区桥梁的抗震概念设计[J]. 地震工程与工程振动，2004，24(1)：92-96.(SONG Xiaodong，LI Jianzhong. The anti-seismic conceptual design of mountainous bridges[J]. Earthquake Engineering and Engineering Vibration，2004，24(1)：92-96.(in Chinese))
[13]	涂杰文，刘红帅，汤爱平，等. 基于离心振动台的堆积型滑坡加速度响应特征[J]. 岩石力学与工程学报，2015，34(7)：1 361-1 369. (TU Jiewen，LIU Hongshuai，TANG Aiping，et al. Acceleration response of colluvial landslide based on centrifugal shaking table test[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(7)：1 361-1 369.(in Chinese))