Upper Limit Analysis of Anti-sliding Stability of a Rigid Retaining Wall in Unsaturated Soils

被引：0
|
作者：
Deng B. [1 ,2 ]
Yang M. [2 ]
Zhao M. [2 ]
机构：
[1] College of Civil Engineering, University of South China, Hengyang
[2] College of Civil Engineering, Hunan University, Changsha
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2023年 / 50卷 / 01期
基金：
中国国家自然科学基金;
关键词：
anti-sliding stability; energy method; retaining wall; suction stress; work-energy balance equation;
D O I：
10.16339/j.cnki.hdxbzkb.2023018
中图分类号：
学科分类号：
摘要：
In the previous analyses of retaining wall stability，it was assumed that the backfill soil behind the wall was saturated soil，and the influence of the suction stress effect on the sliding stability of the retaining wall was ignored，which led to the distortion of the calculation results. In view of this，based on the generalized effective stress principle，the work-energy balance equation applicable to unsaturated soils was derived，and on this basis，a method for calculating the upper limit stability coefficient for anti-sliding of the retaining wall-unsaturated soil system was proposed by using the energy method. The rationality of the method in this paper was verified by comparing the results of OptumG2 numerical software and the existing theoretical methods. And the influence of parameters such as soil shear strength，air-entry value，and seepage flow on the stability of the retaining wall was discussed. The research results show that：1）Compared with sand，suction stress has a greater impact on the stability of retaining wall in clay，while the change of cohesion in the sand is more sensitive to the stability of the wall-soil system；2）With the increase of air-entry value，the contribution of the suction stress to the stability of the wall-soil system decreases and eventually tends to be constant，and the influence of the suction stress on the low retaining wall is more obvious；3）Compared with the case without suction，the stability coefficient considering suction is larger，the influence of different seepage flow on the stability of the wall-soil system is as follows：evaporation> no flow> infiltration，and the seepage flow has the greatest influence on the stability of retaining wall in clay and silt，followed by loess and sand. © 2023 Hunan University. All rights reserved.
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页码：171 / 180
页数：9
相关论文
共 27 条
  • [1] CHOUDHURY D, AHMAD S M．, Stability of waterfront retaining wall subjected to pseudo-static earthquake forces［J］．Ocean En⁃ gineering, 34, 14/15, pp. 1947-1954, (2007)
  • [2] MA S J, WANG K H．, Stability against sliding analysis of a retaining wall under seismic loading condition, Engineering Mechanics, 29, 7, pp. 209-213, (2012)
  • [3] CHAKRABORTY D，, CHOUDHURY D．, Stability of non-vertical waterfront retaining wall supporting inclined backfill under earth⁃ quake and tsunami ［J］, Ocean Engineering, 78, pp. 1-10, (2014)
  • [4] BHATTACHARYYA S K．, Seismic rotational stability of gravity retaining walls by modified pseudo-dynamic method, Soil Dynamics and Earthquake Engineering, 94, pp. 244-253, (2017)
  • [5] HE S M．, Seismic stability analysis of gravity re⁃ taining walls［J］, Soil Dynamics and Earthquake Engineering, 30, 10, pp. 875-878, (2010)
  • [6] LIU J．, Upper bound analysis of stability of retaining wall and anti slide pile with different displacement modes, (2015)
  • [7] PENG W Z, ZHAO M H，, XIAO Y, Stability analysis of anti-slide pile reinforced slope and determination of optimal pile posi⁃ tion［J］, Journal of Hunan University（Natural Sciences）, 47, 5, pp. 23-30, (2020)
  • [8] YANG M H，, WU Z Y，, ZHAO M H．, Soil arch effect analysis and earth pressure calculating method for finite width soil behind re⁃ taining wall ［J］, Journal of Hunan University（Natural Sciences）, 47, 3, pp. 19-27, (2020)
  • [9] LIU J, LI X G., Upper-bound limit analysis on seismic rotational stability of waterfront retaining walls［J］, Marine Georesources & Geotechnology, 1, 19, pp. 32-41, (2021)
  • [10] LIU J．, Seismic rotational stability analysis of gravity re⁃ taining wall under heavy rainfall ［J］, KSCE Journal of Civil Engi⁃ neering, 25, 12, pp. 4575-4584, (2021)
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