竖向分层土主动土压力的分析与计算
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摘要
基于相关联流动法则,确立了挡土墙后竖向分层填土的静力平衡关系,建立了竖向分层主动土压力关于滑动面夹角的数学模型。采用极限平衡理论计算,得到了主动土压力及其分布情况。研究结果表明:竖向土层的土压力沿墙体呈线性分布;滑动面夹角和主动土压力随着墙土摩擦角的增加而减小,主动土压力作用点到墙底的距离也有增加的趋势。该方法为挡土墙工程实际情况的计算提供了合理的途径。
Based on the law of the correlated flow, the static equilibrium of vertical layered fill behind retaining wall is established, and the functional expression of the angle between sliding surface and vertical layered active earth pressure is derived. The magnitude and distribution of active earth pressure are calculated by limit equilibrium theory. The results show that the earth pressure of vertical soil layer distributes linearly along the wall, the angle between sliding surface and active earth pressure is decreased with the increase of friction angle of wall and soil, and the distance between active earth pressure action point and wall bottom is also increased. The method provide a reasonable way for calculating the actual situation of retaining wall engineering.
Based on the law of the correlated flow, the static equilibrium of vertical layered fill behind retaining wall is established, and the functional expression of the angle between sliding surface and vertical layered active earth pressure is derived. The magnitude and distribution of active earth pressure are calculated by limit equilibrium theory. The results show that the earth pressure of vertical soil layer distributes linearly along the wall, the angle between sliding surface and active earth pressure is decreased with the increase of friction angle of wall and soil, and the distance between active earth pressure action point and wall bottom is also increased. The method provide a reasonable way for calculating the actual situation of retaining wall engineering.
引文
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[14]杨和平,谭波.用改进层分法计算分层粘性填土主动土压力[J].西部交通科技,2009(2):22-28.(YANG He-ping,TAN Bo.Calculation of active earth pressure of the layered cohesive fill by the improved layering method[J].Western Transportation Technology,2009(2):22-28.(in Chinese))
[2]蒋希雁,宋思忠.层状填土的主动土压力的理论研究与计算分析[J].建筑科学,2006,22(6):22-24.(JIANG Xiyan,SONG Si-zong.Theoretical study and calculation analysis of active earth pressure for layered fill[J].Architecture Science,2006,22(6):22-24.(in Chinese))
[3]蒋希雁,底素卫,李雪飞.层状粘性填土的主动土压力的理论研究与计算分析[J].建筑科学,2011,27(3):41-44.(JIANG Xi-yan,DI Su-wei,LI Xue-fei.Theoretical study and calculation analysis of active earth pressure for layered cohesive fill[J].Architecture Science,2011,27(3):41-44.(in Chinese))
[4]章瑞文,徐日庆,郭印.考虑挡土墙墙体平移的墙后分层填土主动土压力分布[J].水利学报,2008,39(2):250-255.(ZHANG Rui-wen,XU Ri-qing,GUO Ying.Active earth pressure distribution of layered backfill considering wall movement of retaining wall[J].Journal of Water Conservancy,2008,39(2):250-255.(in Chinese))
[5]郑林达.层状填土主动土压力计算方法的改进[J].宁波大学学报:理工版,2009,22(2):281-284.(ZHEN Lin-da.Improvement of active earth pressure calculation method for layered fill[J].Journal of Ningbo Univer-sity:Natural Science&Engineering,2009,22(2):281-284.(in Chinese))
[6]黄旺,杨建军,黄娟.几种挡土墙主动土压力理论对比及墙体应力分析[J].长沙理工大学学报:自然科学版,2017,14(3):29-34.(HUANG Wang,YANG Jian-jun,HUANG Juan.Theoretical comparison of active earth pressure on several retaining walls and wall stress analysis[J].Journal of Changsha University of Science&Technology:Natural Science,2017,14(3):29-34.(in Chinese))
[7]王淑红,寸江峰.基于三剪统一强度理论的挡土墙土压力计算的水平层分析法[J].西安文理学院学报:自然科学版,2018,21(2):125-128.(WANG Shu-hong,CUN Jiangfeng.Horizontal layer analysis method for retaining wall earth pressure based on three shear unified strength theory[J].Journal of Xi’an University:Natural Science Edition,2018,21(2):125-128.(in Chinese))
[8]何小花,王玉杰,陈祖煜,等.分层挡土墙库伦主动土压力计算方法及应用[J].水利学报,2014,45(增刊2):202-208.(HE Xiao-hua,WANG Yu-jie,CHEN Zu-yu,et al.Calculation method and application of coulomb active earth pressure for layered soil retaining wall[J].Journal of Hydraulic Engineering 2014,45(Supp.2):202-208.(in Chinese))
[9]沈纪苹,陈蕾.基于传递矩阵法的层状土中管桩水平动力阻抗分析[J].岩土力学,2016,37(10):2810-2816.(SHENJi-ping,CHEN Lei.Analysis of horizontal dynamic impedance of pipe pile in layered soils based on transfermatrix formulation[J].Rock and Soil Mechanics,2016,37(10):2810-2816.(in Chinese))
[10]王闫超,晏鄂川,陆文博,等.无粘性有限土体主动土压力解析解[J].岩土力学,2016,37(9):2513-2520.(WANGYan-chao,YAN E-chuan,LU Wen-bo,et al.Analytical solution of active earth pressure for limited cohesionless soils[J].Rock and Soil Mechanics,2016,37(9):2513-2520.(in Chinese))
[11]顾慧慈.挡土墙土压力计算手册[M].北京:中国建材工业出版社,2004.(GU Hui-ci.Manual of earth pressure calculation for the retaining wall[M].Beijing:China Building Materials Industry Press,2004.(in Chinese))
[12]陆运磊,唐正光,付用国,等.农村公路路基冲刷及其破坏研究[J].交通科学与工程,2017,33(4):6-9,19.(LU Yun-lei,TANG Zheng-guang,FU Yong-guo,et al.Research on erosion and protection of rural highway subgrade[J].Journal of Transport Science and Engineering,2017,33(4):6-9,19.(in Chinese))
[13]邓友生,许文涛,刘华飞,等.土质边坡稳定安全系数计算方法研究[J].公路工程,2017,42(2):23-28.(DENGYou-sheng,XU Wen-tao,LIU Hua-fei,et al.Calculation methods for the stability safety coefficient of the soil slope[J].Highway Engineering,2017,42(2):23-28.(in Chinese))
[14]杨和平,谭波.用改进层分法计算分层粘性填土主动土压力[J].西部交通科技,2009(2):22-28.(YANG He-ping,TAN Bo.Calculation of active earth pressure of the layered cohesive fill by the improved layering method[J].Western Transportation Technology,2009(2):22-28.(in Chinese))