多级拼装悬臂式挡墙地震响应振动台模型试验

doi:10.13722/j.cnki.jrme.2020.0481

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (6050 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要多级拼装悬臂式挡墙是一种可用于高填方工程的新型轻型支挡结构。为确定墙–坡系统的地震动力响应特征，进行几何、重度和时间相似比分别为1∶10，1∶1和1∶3.162的三级拼装悬臂墙支挡边坡的水平振动台模型试验。结果表明：坡体加速度沿墙高呈明显的非线性放大效应；墙后静止土压力和动土压力均呈“三峰型”分布模式，各级墙踵板对其下部墙背土压力存在遮蔽效应，动土压力沿墙高呈显著的多段折线型分布模式；在地震波波峰时刻，墙体位移急剧增大并接近永久位移；地震作用过程中墙–坡系统的变形发展可分为PGA≤0.4 g时的多级墙体微小变形、0.4 g＜PGA＜1 g时的最下一级墙体水平向显著滑移、PGA≥1 g时的墙–坡系统大变形共3个阶段；墙–坡系统的失稳破坏可相应分为3种模式：最下一级墙沿墙底水平滑移、中下级墙后土体滑移–拉裂和全墙–边坡系统整体滑动。基于此破坏模式，采用拟静力法对墙–坡系统地震整体稳定性进行了分析，实例计算表明，简化Bishop法和传递系数法所得的墙–坡整体稳定系数相近，均比Fellenius法大3%～13%，且此偏差随PGA增大而显著。

	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
	何江1
	肖世国1
	2

关键词 ：土力学, 多级拼装悬臂式挡墙, 振动台模型试验, 地震响应, 动土压力, 破坏模式, 稳定系数

Abstract：Assembled multi-step cantilever retaining wall is one of new types of light retaining structures suitable for high fill earthworks. In order to determine seismic responses of the wallslope system，horizontally shaking table model tests of assembled threestep cantilever retaining walls supporting a fill slope were conducted with geometry，gravity and time similarity ratios of 1∶10，1∶1 and 1∶3.162 respectively. The results show that the acceleration of the wall-slope system has obviously nonlinear amplification effect upwards along the wall. Both static and dynamic earth pressures on the walls are generally distributed in a trimodal model. Except for the highest-step wall，there is reduction effect of the earth pressure at each wall top due to the shielding action of the nearby heel plates inserted in the filling soil. Distribution of the dynamic earth pressure is commonly multi-segment polyline. At the moment of the peak acceleration of input seismic waves，wall displacements are sharply rising and almost close to their permanent values. During the process of strong seismic action，deformation development of the wall-slope system can be divided into 3 stages including slight deformation of each wall under PGA≤0.4 g，visibly horizontal movement of the lowest-step wall under 0.4 g＜PGA＜1 g，as well as seriously high displacements of all walls under PGA≥1 g. Correspondingly，the failure mode of the wall-slope system can be classified as three types covering horizontally sliding failure of the lowest-step wall along its bottom，shear-tension failure of the filling soil behind the lower walls，together with overall slide failure of the wall-slope system. Based on the overall failure mode determined by the tests，stability analysis of the wall-slope system was carried out according to the pseudo-static approach. Analysis results of a practical example indicate that the factors of safety under various earthquakes by simplified Bishop method and transfer coefficient method are almost equal to each other and about 3%–13% higher than that obtained by Fellenius method. The difference is increasing with rising PGA.

Key words： soil mechanics assembled multi-step cantilever retaining walls shaking table model test seismic response dynamic earth pressure failure mode factor of safety

引用本文:

何江1，肖世国1，2. 多级拼装悬臂式挡墙地震响应振动台模型试验[J]. 岩石力学与工程学报, 2021, 40(2): 399-409.
HE Jiang1，XIAO Shiguo1，2. Shaking table model test study on seismic responses of assembled multi-step cantilever retaining walls. , 2021, 40(2): 399-409.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0481 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I2/399

[23]	NEWMARK N. M. Effects of earthquakes on dams and embankments[J]. Geotechnique，1965，15(2)：139-159.
[25]	BISHOP A W. The use of the slip circle in stability analysis of slope[J]. Geotechnique，1955，5(1)：7-17.
[18]	苏利亚. 二级悬臂式挡土墙的力学分析[J]. 黑龙江交通科技，2017，40(5)：10-11.(SU Liya. A dissertation on two-stage mechanical analysis of cantilever retaining wall[J]. Communications Science and Technology Heilongjiang，2017，40(5)：10-11.(in Chinese))
[5]	文畅平. 多级支挡结构与边坡系统地震动力特性及抗震研究[博士学位论文][D]. 长沙：中南大学，2013.(WEN Changping. Study on seismic dynamic characteristics and seismic design of multistage retaining structures and slopes[Ph. D. Thesis][D]. Changsha：Central South University，2013.(in Chinese))
[8]	范瑛，何云川. 多级重力式挡土墙施工变形数值模拟[J]. 土木工程与管理学报，2013，30(2)：27-31.(FAN Ying，HE Yunchuan. Numerical simulation of deformation of multistage gravity retaining walls in construction stage[J]. Journal of Civil Engineering and Management，2013，30(2)：27-31.(in Chinese))
[2]	苏杭，周海清，武松. 多级边坡施工效应的模型试验研究[J].岩土力学，2017，38(8)：2 261-2 269.(SU Hang，ZHOU Haiqing，WU Song. Model test research on construction effect of the multi-stage slope[J]. Rock and Soil Mechanics，2017，38(8)：2 261-2 269.(in Chinese))
[1]	陈亮，赵旭航，陶君军，等. 多级台阶式格宾高挡墙防护高陡边坡路基施工技术[J]. 公路，2017，62(9)：135-140.(CHEN Liang，ZHAO Xuhang，TAO Junjun，et al. Construction technology of slope protection in high steep slope embankment using high gabion retaining wall with multiple terraces[J]. Highway，2017，62(9)：135-140.(in Chinese))
[7]	王德华，吴祚菊，张建经，等. 多级组合支护结构对非均质高边坡抗震性能影响分析[J]. 振动工程学报，2019，32(3)：404-414. (WANG Dehua，WU Zuoju，ZHANG Jianjing，et al. Analysis of antiseismic effect of anisotropic high slopes reinforced by multi-frame retaining structure[J]. Journal of Vibration Engineering，2019，32(3)：404-414.(in Chinese))
[9]	文畅平. 多级支护边坡屈服加速度及因素敏感性分析[J]. 岩土力学，2013，34(10)：2 889-2 897.(WEN Changping. Study of yield acceleration of slope stabilized by multistage retaining earth structures and sensitivity analysis of influence factors[J]. Rock and Soil Mechanics，2013，34(10)：2 889-2 897.(in Chinese))
[11]	CAKIR T. Backfill and subsoil interaction effects on seismic behavior of a cantilever wall[J]. Geomechanics and Engineering，2014，6(2)：117-138.
[3]	王智超，周芊妤，熊赟，等. 高填方多级挡墙路堤变形及稳定性分析[J]. 防灾减灾工程学报，2018，38(6)：980-988.(WANG Zhichao，ZHOU Qianyu，XIONG Yun，et al. Deformation and stability of high-filled embankment with multilevel retaining walls[J]. Journal of Disaster Prevention and Mitigation Engineering，2018，38(6)：980-988.(in Chinese))
[4]	范瑛，雷洋，章光. 多级重力式挡土墙土压力分布试验研究[J]. 岩土力学，2010，31(10)：3 125-3 129.(FAN Ying，LEI Yang，ZHANG Guang. Experimental study of earth pressure distribution of multistage gravity retaining walls[J]. Rock and Soil Mechanics，2010，31(10)：3 125-3 129.(in Chinese))
[6]	付晓，张建经，周立荣. 多级框架锚索和抗滑桩联合作用下边坡抗震性能的振动台试验研究[J]. 岩土力学，2017，38(2)：462-470. (FU Xiao，ZHANG Jianjing，ZHOU Lirong. Shaking table test of seismic response of slope reinforced by combination of anti-slide piles and multi-frame foundation beam with anchor cable[J]. Rock and Soil Mechanics，2017，38(2)：462-470.(in Chinese))
[10]	文畅平. 多级锚固高边坡临界高度影响因素敏感性分析[J]. 中国公路学报，2014，27(2)：35-44.(WEN Changping. Sensitivity analysis of critical height and its influence factors of multistage anchored high slope[J]. China Journal of Highway and Transport，2014，27(2)：35-44.(in Chinese))
[13]	OSOULI A，ZAMIRAN S. The effect of backfill cohesion on seismic response of cantilever retaining walls using fully dynamic analysis[J]. Computers and Geotechnics，2017，89：143-152.
[14]	KLOUKINAS P，DI SANTOLO A S，PENNA A，et al. Investigation of seismic response of cantilever retaining walls Limit analysis vs shaking table testing[J]. Soil Dynamics and Earthquake Engineering，2015，77：432-445.
[16]	梁波，王家东，严松宏. 垛式新型悬臂式挡墙的数值分析及应用探讨[J]. 岩石力学与工程学报，2006，25(增1)：3 174-3 180. (LIANG Bo，WANG Jiadong，YAN Songhong. Discussion on numerical analysis ang application of new structure of cantilever retaining wall[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.1)：3 174-3 180.(in Chinese))
[20]	贾喜翠，马学宁，张龙. 地震作用下二级悬臂式挡土墙土压力计算的探讨[J]. 世界地震工程，2016，32(2)：196-203.(JIA Xicui，MA Xuening，ZHANG Long. Discussion of calculation of earth pressure for secondary cantilever retaining wall under earthquake [J]. World Earthquake Engineering，2016，32(2)：196-203.(in Chinese))
[24]	PETTERSON K E. The early history of circular sliding surfaces[J]. Geotechnique，1955，5(4)：275-296.
[12]	GIRI D. Pseudo-dynamic methods for seismic passive earth pressure behind a cantilever retaining wall with inclined backfill[J]. Geomechanics and Geoengineering，2014，9(1)：72-78.
[17]	王景环，傅绍娟. 二级新型悬臂式挡土墙有限元分析[J]. 山西建筑，2010，36(13)：79-80.(WANG Jinghuan，FU Shaojuan. Finite element analysis of two-grade arm blocked wall[J]. Shanxi Architecture，2010，36(13)：79-80.(in Chinese))
[19]	毛海君. 二级悬臂式挡墙振动台模型试验与动力分析[J].地下空间与工程学报，2015，11(增1)：108-112.(MAO Haijun. Shaking table model experiment and dynamic analysis of two-step cantilevered retaining wall[J]. Chinese Journal of Underground Space and Engineering，2015，11(Supp.1)：108-112.(in Chinese))
[15]	付春晓，雷俊卿. 公路悬臂挡土墙抗震设计计算分析[J]. 公路交通科技，2006，(2)：61-63.(FU Chunxiao，LEI Junqing. Earthquake- resistance design calculation and analysis for lightweight retaining wall of highway[J]. Journal of Highway and Transportation Research and Development，2006，(2)：61-63.(in Chinese))
[21]	周颖，卢文胜，吕西林. 模拟地震振动台模型实用设计方法[J].结构工程师，2003，(3)：30-33.(ZHOU Ying，LU Wensheng，LV Xiling. Practical model design method of shaking table tests[J]. Structural Engineers，2003，(3)：30-33.(in Chinese))
[26]	中华人民共和国国家标准编写组. GB 50330—2013建筑边坡工程技术规范[S]. 北京：中国建筑工业出版社，2013.(The National Standards Compilation Group of People¢s Republic of China. GB 50330—2013 Technical code for building slope engineering[S]. Beijing：China Architecture and Building Press，2013.(in Chinese))
[22]	中华人民共和国国家标准编写组. GB 50111—2006铁路工程抗震设计规范[S]. 北京：中国计划出版社，2006.(The National Standards Compilation Group of People¢s Republic of China. GB 50111—2006 Code for seismic design of railway engineering[S]. Beijing：China Planning Press，2006.(in Chinese))