Centrifugal model tests on features of slip surfaces in backfill and earth pressures against balance weight retaining walls

LUO Qiang; HUANG Yu; ZHAO Jia-wei; GUO Zeng-rui; XIONG Shi-jie; ZHANG Liang

doi:10.11779/CJGE202211002

Volume 44 Issue 11

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2022 > 44(11): 1968-1977. > DOI: 10.11779/CJGE202211002

LUO Qiang, HUANG Yu, ZHAO Jia-wei, GUO Zeng-rui, XIONG Shi-jie, ZHANG Liang. Centrifugal model tests on features of slip surfaces in backfill and earth pressures against balance weight retaining walls[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(11): 1968-1977. DOI: 10.11779/CJGE202211002

Citation:

PDF (3444 KB)

Centrifugal model tests on features of slip surfaces in backfill and earth pressures against balance weight retaining walls

1.
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2.
MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China

More Information

Received Date: October 19, 2021
Available Online: December 08, 2022

Graphical Abstract

Abstract

Abstract

Mastering the features of slip surfaces in backfill and earth pressures against the balance weight retaining wall with complex back shape is of great significance to improving the structural design. A set of wall displacement real-time controlled mechanism is developed, and geotechnical centrifugal model tests on three types of embankment filling heights with balance weight retaining walls are conducted. The deformation and fracture characteristics of backfill and the variation laws of earth pressure under translation mode are analyzed, and then the difference between the experimental data and the standard design values is compared. A modified method is proposed for the earth pressures based on the shearing state of slip surfaces to address the existing problems in the traditional models. The results show that when the active limit state is reached, only the slip surface towards the lower wall and the second slip surface towards the upper wall occur in the backfill, which is divided into three regions: translational soil, sliding soil and immobile soil. The shear stress of the first slip surface towards the upper wall does not reach the limit, which is the key factor causing the value of earth pressure tests on the upper wall to be significantly larger than the design value but smaller than that on the lower wall. By introducing a mobilization coefficient (η≤1) of internal friction angle (φ) for the first slip surface towards the upper wall, a modified pattern for calculating the earth pressures against the balance weight retaining wall is proposed to better reflect the influences of the stress declination angle (φ_η=ηφ) on slip surface dips and earth pressures against the upper and lower walls. With this improvement, the calculation-modified values are in good agreement with the experimental data.
- balance weight retaining wall,
- slip surface,
- earth pressure,
- centrifugal model test,
- stress declination angle

FullText(HTML)

References (22)

References

[1]	吴宗俭. 衡重式挡土墙[J]. 土木工程学报, 1960(2): 36–41. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC196002006.htm WU Zong-jian. Balance weight retaining wall[J]. China Civil Engineering Journal, 1960(2): 36–41. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC196002006.htm
[2]	周镜, 李惠康, 郑明成. 衡重式挡墙的模型试验及其土压力计算[J]. 土木工程学报, 1963(10): 58–73. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC196301008.htm ZHOU Jing, LI Hui-kang, ZHENG Ming-cheng. Model tests on balance weight retaining wall and calculation of earth pressure[J]. China Civil Engineering Journal, 1963(10): 58–73. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC196301008.htm
[3]	唐山铁道学院线路教研室挡土墙研究小组. 折线形挡土墙土压力—关于上下墙间影响的探讨[J]. 唐山铁道学院学报, 1964(2): 51–56. https://www.cnki.com.cn/Article/CJFDTOTAL-XNJT196402002.htm Study Team of Line Staff Room of Tangshan Railway College. Earth pressure of polygonal-shape retaining wall—About discussion of the effect between upper and down wall[J]. Journal of Tangshan Railway College, 1964(2): 51–56. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XNJT196402002.htm
[4]	张家国. 衡重式挡土墙受力及变形特性离心模型实验研究[D]. 成都: 西南交通大学, 2004. ZHANG Jia-guo. Centrifugal Model Test Study on the Soil Pressure and Deformation of Retainingwall with Equilibratior[D]. Chengdu: Southwest Jiaotong University, 2004. (in Chinese)
[5]	李浩, 罗强, 张良, 等. 不同位移模式下衡重式路肩墙离心模型试验研究[J]. 岩土工程学报, 2015, 37(4): 675–682. http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/abstract/abstract16118.shtml LI Hao, LUO Qiang, ZHANG Liang, et al. Centrifugal model tests on shoulder balance weight retaining wall with various motion modes[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(4): 675–682. (in Chinese) http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/abstract/abstract16118.shtml
[6]	李浩, 罗强, 张良, 等. 衡重式加筋土路肩挡墙土工离心模型试验研究[J]. 岩土工程学报, 2014, 36(3): 458–465. http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/abstract/abstract15665.shtml LI Hao, LUO Qiang, ZHANG Liang, et al. Centrifugal model tests on shoulder balance weight retaining wall with reinforced earth[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(3): 458–465. (in Chinese) http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/abstract/abstract15665.shtml
[7]	铁路路基支挡结构设计规范: TB 10025—2019[S]. 2019. Code for Design of Retaining Structures of Railway Earthworks: TB 10025—2019[S]. 2019. (in Chinese)
[8]	铁道部第一勘测设计院. 铁路工程设计技术手册(路基)[M]. 北京: 中国铁道出版社, 1994. First Survey & Design Institute of the Ministry of Railway. Technical Manual for Railway Engineering Design: Subgrade[M]. Beijing: China Railway Press, 1994. (in Chinese)
[9]	YAKOVLEV P I. Experimental investigations of earth pressure on walls with two relieving platforms in the case of breaking loads on the backfill[J]. Soil Mechanics and Foundation Engineering, 1974, 11(3): 151–155.
[10]	CHAUHAN V B, DASAKA S M. Performance of a rigid retaining wall with relief shelves[J]. Journal of Performance of Constructed Facilities, 2018, 32(3): 211–219.
[11]	刘昌清, 陶志平, 彭胤宗. 墙背填料为砂性土的短卸荷板式挡土墙离心模型试验[J]. 西南交通大学学报, 1996, 31(1): 81–85. https://www.cnki.com.cn/Article/CJFDTOTAL-XNJT601.013.htm LIU Chang-qing, TAO Zhi-ping, PENG Ying-qiang. Centrifugal model test of retaining wall with short relieving plate on sand backfill[J]. Journal of Southwest Jiaotong University, 1996, 31(1): 81–85. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XNJT601.013.htm
[12]	刘国楠, 胡荣华, 潘效鸿, 等. 衡重式桩板挡墙上墙土压力模型试验研究[J]. 岩土力学, 2011, 32(增刊2): 94–99. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2011S2015.htm LIU Guo-nan, HU Rong-hua, PAN Xiao-hong, et al. Model tests on earth pressure of upper part wall of sheet pile wall with relieving platform[J]. Rock and Soil Mechanics, 2011, 32(S2): 94–99. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2011S2015.htm
[13]	刘国楠, 胡荣华, 潘效鸿, 等. 衡重式桩板挡墙受力特性模型试验研究[J]. 岩土工程学报, 2013, 35(1): 103–110. http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/abstract/abstract14926.shtml LIU Guo-nan, HU Rong-hua, PAN Xiao-hong, et al. Model tests on mechanical behaviors of sheet pile wall with relieving platform[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(1): 103–110. (in Chinese) http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/abstract/abstract14926.shtml
[14]	铁路路基设计规范: TB 1000—2016[S]. 2016. Code for Design of Railway Earth Structure: TB 1000—2016[S]. 2016. (in Chinese)
[15]	WHITE D J, TAKE W A, BOLTON M D. Soil deformation measurement using particle image velocimetry (PIV) and photogrammetry[J]. Géotechnique, 2003, 53(7): 619–631.
[16]	WHITE D J. An Investigation Into Behaviour of Pressed-in Piles[D]. Cambridge: University of Cambridge, 2003.
[17]	FANG Y S, HO Y C, CHEN T J. Passive earth pressure with critical state concept[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2002, 128(8): 651–659.
[18]	HANDY R L. The arch in soil arching[J]. Journal of Geotechnical Engineering, 1985, 111(3): 302–318.
[19]	FANG Y S, CHENG F P, CHEN R T. Earth pressures under general wall movements[J]. Journal of Geotechnical Engineering, ASCE, 1993, 24(2): 113–131.
[20]	PAIK K H, SALGADO R. Estimation of active earth pressure against rigid retaining walls considering arching effects[J]. Géotechnique, 2003, 53(7): 643–653.
[21]	KHOSRAVI M H, PIPATPONGSA T, TAKEMURA J. Experimental analysis of earth pressure against rigid retaining walls under translation mode[J]. Géotechnique, 2013, 63(12): 1020–1028.
[22]	芮瑞, 叶雨秋, 陈成, 等. 考虑墙壁摩擦影响的挡土墙主动土压力非线性分布研究[J]. 岩土力学, 2019, 40(5): 1797–1804. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201905020.htm RUI Rui, YE Yu-qiu, CHEN Cheng, et al. Nonlinear distribution of active earth pressure on retaining wall considering wall-soil friction[J]. Rock and Soil Mechanics, 2019, 40(5): 1797–1804. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201905020.htm