悬臂挡墙–微型桩加固填土边坡地震响应特征研究

doi:10.13722/j.cnki.jrme.2021.1300

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Abstract As a retaining structure suitable for seismic areas，cantilever retaining walls(CRWs) are widely used，at the back of which backfills show a certain slope angle. Many problems(such as how to determine the level and point of action of the seismic earth pressure，displacement and deformation and failure mode) still occur during seismic design of retaining walls. Moreover，micropiles with favourable seismic behaviours have been extensively used in the fields of controlling shallow landslides and reinforcing slopes. Research on mechanical characteristics，load and deformation accumulation of micropiles under the lateral dynamic load remains sparse. To this end，the seismic response characteristics of a micropile-reinforced cut slope behind a CRW under multistage continuous earthquake loadings were studied by means of a centrifuge shaking-table model test. At the same time，the typical shaking event is numerically simulated. The seismic response characteristics of the slope system supported by micropiles and CRWs were analyzed and discussed from three aspects of seismic acceleration response of the slope and the settlement and deformation of the slope crest，seismic response of the micropiles and distribution of bending moment on the piles，and the level and point of action of the dynamic earth pressure，the bending moment and the influence of the bending moment of inertia generated by the self-weight of CRWs，displacement and deformation mode during an earthquake and cumulative development of the residual bending moment. A transfer-function analysis of the input and output accelerations shows that the slope soil has a significant acceleration amplification effect on the frequency components of the input seismic waves approaching their natural frequency. It is necessary to set the rigid connected beams on the upper part of the micropile structure，which is able to improve the mechanical performance of micropiles. Due to the flexibility and ductility of micropiles，more energy can be dissipated under the effect of seismic load. The bending moment of inertia on the CRWs cannot be ignored because it exceeds 22% of the dynamic bending moment. When there is a large slope angle of backfill，and loads are applied to the upper part of the slope crest，the dynamic earth pressure coefficient ΔKae is much larger than that when the backfill is flat and no additional loads are applied. In addition，the significant residual bending moment is accumulated on CRWs and micropiles after earthquakes，which needs to be considered during the seismic design of retaining structures.

Key words： slope engineering dynamic centrifuge test dynamic earth pressure cantilever retaining wall micropile；dynamic earth pressure coefficient residual bending moment

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	Articles by authors
	SUN Zhiliang1
	KONG Lingwei1
	2
	WANG Yong1
	ZHOU Zhenhua1
	2

Cite this article:

SUN Zhiliang1,KONG Lingwei1,2, et al. Study on seismic response characteristics of a micropile-reinforced filled slope behind a cantilever retaining wall[J]. , 2022, 41(10): 2109-2123.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.1300 OR http://rockmech.whrsm.ac.cn/EN/Y2022/V41/I10/2109

[5]	HUANG C C，LUO W M. Behavior of soil retaining walls on deformable foundations[J]. Engineering Geology，2009，105(1)：1–10.
[23]	ALNUAIM A M，NAGGAR M H，NAGGAR H. Numerical investigation of the performance of micropiled rafts in sand[J]. Computers and Geotechnics，2016，77：91–105.
[29]	CANDIA G，SITAR N. Seismic earth pressures on retaining structures with cohesive backfills[R]. Berkeley：University of California，2013.
[30]	WILSON P，ELGAMAL A. Shake table lateral earth pressure testing with dense c-? backfill[J]. Soil Dynamics and Earthquake Engineering，2015，71：13–26.
[14]	WAGNER N，SITAR N. On seismic response of stiff and flexible retaining structures[J]. Soil Dynamics and Earthquake Engineering，2016，91：284–293.
[35]	OKABE S. General theory of earth pressures[J]. Journal of the Japanese Society of Civil Engineers，10(6)：1 277–1 323.
[2]	梁波，王家东，葛建军，等. 青藏铁路L型挡土墙的土压力实测与分析[J]. 岩土工程学报，2004，26(5)：627–631.(LIANG Bo，WANG Jiadong，GE Jianjun，et al. Testing and analysis of earth pressure about L type retaining wall in Qinghai—Tibet railway[J]. Chinese Journal of Geotechnical Engineering，2004，26(5)：627–631.(in Chinese))
[4]	高洪梅，卜春尧，王志华，等. 回填EPS混合土的防滑悬臂式挡墙地震稳定性分析[J]. 岩土工程学报，2017，39(12)：2 278–2 286. (GAO Hongmei，BU Chunyao，WANG Zhihua，et al. Seismic stability of anti-sliding cantilever retaining wall with EPS composite soil[J]. Chinese Journal of Geotechnical Engineering，2017，39(12)：2 278–2 286.(in Chinese))
[8]	CONTI R，CAPUTO G. A numerical and theoretical study on the seismic behaviour of yielding cantilever walls[J]. Géotechnique，2018，69(5)：1–14.
[10]	JO S B，HA J G，LEE J S，et al. Evaluation of the seismic earth pressure for inverted T-shape stiff retaining wall in cohesionless soils via dynamic centrifuge[J]. Soil Dynamics and Earthquake Engineering，2017，92：345–357.
[12]	ATIK L A，SITAR N. Seismic earth pressures on cantilever retaining structures[J]. Journal of Geotechnical and Geoenvironmental Engineering，2010，136(10)：1 324–1 333.
[15]	KLOUKINAS P，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.
[18]	黄广龙，方乾，苏荣臻. 软土地基微型桩抗拔试验研究[J]. 岩土工程学报，2010，32(11)：1 788–1 793.(HUANG Guanglong，FANG Qian，SU Rongzhen. Field test on uplift behavior of micropiles in soft ground[J]. Chinese Journal of Geotechnical Engineering，2010，32(11)：1 788–1 793.(in Chinese))
[20]	王洋，冯君，谢先当，等. 微型桩组合抗滑结构受力机制的现场试验研究[J]. 岩土力学，2018，39(11)：4 226–4 231.(WANG Yang，FENG Jun，XIE Xiandang，et al. In-situ experimental study of anti-siding mechanism of micro-pile combined structure[J]. Rock and Soil Mechanics，2018，39(11)：4 226–4 231.(in Chinese))
[22]	BAYESTEH H，SABERMAHANI M. Full-scale field study on effect of grouting methods on bond strength of hollow-bar micropiles[J]. Journal of Geotechnical and Geoenvironmental Engineering，2018，144(12)：04018091.
[6]	ERTUGRUL O L，TRANDAFIR A C，YENER O M. Reduction of dynamic earth loads on flexible cantilever retaining walls by deformable geofoam panels[J]. Soil Dynamics and Earthquake Engineering，2017，92：462–471.
[16]	ATHANASOPOULOS-ZEKKOS A，VLACHAKIS V S，ATHANASOPOULOS G A. Phasing issues in the seismic response of yielding，gravity-type earth retaining walls-Overview and results from a FEM study[J]. Soil Dynamics and Earthquake Engineering，2013，55：59–70.
[25]	中华人民共和国行业标准编写组. TB 10025—2019铁路路基支挡结构设计规范[S]. 北京：中国铁道出版社，2019.(The Professional Standards Compilation Group of People?s Republic of China. TB 10025—2019 Code for design of retaining structures of railway earthworks[S]. Beijing：China Railway Publishing House，2019.(in Chinese))
[26]	MIKOLA R G，SITAR N. Seismic earth pressures on retaining structures in cohesionless soils[R]. Berkeley：University of California，2013.
[28]	CANDIA G，MIKOLA R G，SITAR N. Seismic response of retaining walls with cohesive backfill：Centrifuge model studies[J]. Soil Dynamics and Earthquake Engineering，2016，90：411–419.
[32]	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.
[36]	MYLONAKIS G，KLOUKINAS P，PAPATONOPOULOS C. An alternative to the Mononobe-Okabe equation for seismic earth pressures[J]. Soil Dynamics and Earthquake Engineering，2007：27(10)：957–969.
[38]	ANDERSON D G，MARTIN G R，LAM I P，et al. Seismic design and analysis of retaining walls，buried structures，slopes and embankments[R]. Washington，D. C.：Transportation Research Board，National Cooperative Highway Research Program，2008.
[40]	肖诗云，张浩. 加载速率对钢筋混凝土梁剪切特性的影响研究[J]. 水利与建筑工程学报，2018，16(3)：7–13.(XIAO Shiyun，ZHANG Hao. Effects of loading rate on the shear behaviors of RC beams[J]. Journal of Water Resources and Architectural Engineering，2018，16(3)：7–13.(in Chinese))
[1]	何江，肖世国. 多级拼装悬臂式挡墙地震永久位移计算方法[J].岩土力学，2021，42(7)：1 971–1 982.(HE Jiang，XIAO Shiguo. Calculation method for seismic permanent displacement of assembled multi-step cantilever retaining walls[J]. Rock and Soil Mechanics，2021，42(7)：1 971–1 982.(in Chinese))
[3]	魏永幸，罗一农，刘昌清. 基于极限状态法的悬臂式挡土墙设计研究[J]. 铁道工程学报，2014，31(11)：6–9.(WEI Yongxing，LUO Yinong，LIU Changqing. Design research of cantilever retaining wall based on limit state design method[J]. Journal of Railway Engineering Society，2014，31(11)：6–9.(in Chinese))
[11]	JO S B，HA J G，YOO M，et al. Seismic behavior of an inverted T shape flexible retaining wall via dynamic centrifuge tests[J]. Bulletin of Earthquake Engineering，2014，12：961–980.
[13]	ATIK L A. Experimental and analytical evaluation of seismic earth pressures on cantilever retaining structures[Ph. D. Thesis][D]. Berkeley：University of California，2008.
[21]	ELAZIZ A Y，NAGGAR M H. Performance of hollow bar micropiles under monotonic and cyclic lateral loads[J]. Journal of Geotechnical and Geoenvironmental Engineering，2015，141(5)：04015010.
[31]	SHUKLA S，GUPTA S，SIVAKUGAN N. Active earth pressure on retaining wall for c-? soil backfill under seismic loading condition[J]. Journal of Geotechnical and Geoenvironmental Engineering，2009，135(5)：690–696.
[33]	ZAMIRAN S，OSOULI A. Seismic motion response and fragility analyses of cantilever retaining walls with cohesive backfill[J]. Soils and Foundations，2018，58(2)：412–426.
[7]	戴自航，林智勇，郑也平，等. L型挡土墙主动土压力计算的基底摩擦系数折减有限元法[J]. 岩土工程学报，2009，31(4)：508–514.(DAI Zihang，LIN Zhiyong，ZHENG Yeping，et al. Finite element method for computations of active earth pressures acting on L-shaped retaining walls with reduced friction coefficients of base bottoms[J]. Chinese Journal of Geotechnical Engineering，2009，31(4)：508–514. (in Chinese))
[9]	BENTLER J G，LABUZ J F. Performance of a cantilever retaining wall[J]. Journal of Geotechnical and Geoenvironmental Engineering，2006，132(8)：1 062–1 070.
[17]	BAKR J，AHMAD S M，LOMBARDI D. Finite-element study for seismic structural and global stability of cantilever-type retaining walls[J]. International Journal of Geomechanics，2019，19(10)：04019117.
[19]	李楠，门玉明，高讴，等. 微型桩群桩支护滑坡的地震动力响应研究[J]. 岩石力学与工程学报，2018，37(9)：157–164.(LI Nan，MEN Yuming，GAO Wei，et al. Seismic behavior of the landslide supported by micropiles[J]. Chinese Journal of Rock Mechanics and Engineering,2018，37(9)：157–164.(in Chinese))
[27]	MIKOLA R G，CANDIA G，SITAR N. Seismic earth pressures on retaining structures and basement walls in cohesionless soils[J]. Journal of Geotechnical and Geoenvironmental Engineering，2016，142(10)： 04016047.
[37]	EVANGELISTA A，SANTOLO A S，SIMONELLI A L. Evaluation of pseudostatic active earth pressure coefficient of cantilever retaining walls[J]. Soil Dynamics and Earthquake Engineering，2010，30(11)：1 119–1 128.
[39]	袁健，易伟建. 加载速率对钢筋混凝土梁受剪性能影响的试验研究[J]. 振动与冲击，2019，38(7)：119–127.(YUAN Jian，YI Weijian. Tests for effects of loading rate on shear behaviors of RC beams[J]. Journal of Vibration and Shock，2019，38(7)：119–127.(in Chinese))
[24]	中华人民共和国行业标准编写组. JTG D30—2015公路路基设计规范[S]. 北京：人民交通出版社，2015.(The Professional Standards Compilation Group of People?s Republic of China. JTG D30—2015 Specifications for design of highway subgrades[S]. Beijing：China Communications Press，2015.(in Chinese))
[34]	MONONOBE N，MATSUO H. On the determination of earth pressures during earthquakes[C]// Proceedings of the World Engineering Congress. Tokyo：[s. n.]，1929：177–185.