土体应力状态下主动土压力分布研究
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摘要
土压力问题一直是支挡结构设计的重要依据之一,经典土压力理论的假设条件会对实际工程的设计造成误差。在经典理论的基础上,分析了墙后土体的应力状态,推导了考虑墙背摩擦情况的侧土压力系数和土压力应力分布计算表达式,通过与Tsagareli砂性土模型试验实测土压力分布对比,说明了本文方法的合理性,并结合算例分别计算了平面破裂面假定和圆弧破裂面假定情况下土压力及其分布。计算结果表明,取库伦搜索真实破裂面的平面假定时,侧土压力系数为常数,土压力与库伦理论结果一致,为线性分布。取最危险圆弧滑动面的曲面假定时,侧土压力系数呈先增大后减小的变化特点,土压力为非线性分布。
Earth pressure is one of the important bases for the retaining structure design,and the reason for the errors in the design calculation of practical engineering is assumptions of classical soil pressure theory. This paper considers the friction of the wall deduced the lateral earth pressure coefficient and earth pressure stress distribution based on soil analysis of states of stresses under the classical theory. Comparison of the measured soil pressure distribution through the Tsagareli sand soil model test,the reasonableness of the method in this paper is explained.Combined with an example,the soil pressure and its distribution under the assumption of plane fracture surface and circular arc fracture surface are calculated respectively. The result indicated that under the assumption of the plane in Coulomb to search the real fracture surface,the lateral earth pressure coefficient is constant and the soil pressure is linear distribution consistent with the results of the Coulomb theory in this paper. The lateral earth pressure coefficient first increases and then decreases under the assumption of the circular dangerous slide surface,and the soil pressure is non-linear distribution.
Earth pressure is one of the important bases for the retaining structure design,and the reason for the errors in the design calculation of practical engineering is assumptions of classical soil pressure theory. This paper considers the friction of the wall deduced the lateral earth pressure coefficient and earth pressure stress distribution based on soil analysis of states of stresses under the classical theory. Comparison of the measured soil pressure distribution through the Tsagareli sand soil model test,the reasonableness of the method in this paper is explained.Combined with an example,the soil pressure and its distribution under the assumption of plane fracture surface and circular arc fracture surface are calculated respectively. The result indicated that under the assumption of the plane in Coulomb to search the real fracture surface,the lateral earth pressure coefficient is constant and the soil pressure is linear distribution consistent with the results of the Coulomb theory in this paper. The lateral earth pressure coefficient first increases and then decreases under the assumption of the circular dangerous slide surface,and the soil pressure is non-linear distribution.
引文
[1]陈仲颐,周景星,王洪瑾.土力学[M].北京:清华大学出版社,2007.(Chen Zhongyi,Zhou Jingxing,Wang Hongjin. Soil mechanics[M]. Beijing:Tsinghua University Press,2007.(in Chinese))
[2]高大钊,袁聚云.土质学与土力学[M].北京:人民交通出版社,2006.(Gao Dazhao,Yuan Juyun. Soil science and soil mechanics[M]. Beijing:China Communication Press,2006.(in Chinese))
[3]李军,王贻荪.确定挡土墙主动土压力分布的薄层分析法[J].湖南大学学报,1998,25(5):147-153.(Li Jun,Wang Yisun. Determination of active earth pressure distribution against retaining wall by thin-layer method[J]. Journal of Hunan University,1998,25(5):147-153.(in Chinese))
[4]王元战,李新国,陈楠楠.挡土墙主动土压力分布与侧压力系数[J].岩土工程学报,2005,26(7):1019-1022.(Wang Yuanzhan, Li Xinguo, Cheng Nannan. Active earth pressure on a retaining wall and lateral coefficient of earth pressure[J]. Chinese Journal of Geotechnical Engineering, 2005, 26(7):1019-1022.(in Chinese))
[5]蒋波,应宏伟,谢康和.挡土墙后土体拱效应分析[J].浙江大学学报(工学版),2005,39(1):131-136.(Jiang Bo,Ying Hongwei,Xie Kanghe. Analysis on soil arching behind retaining wall[J]. Journal of Zhejiang University(Engineering Science Edition),2005,39(1):131-136.(in Chinese))
[6]朱建明,赵琦.考虑土拱效应的挡土墙主动土压力与被动土压力统一解[J].岩土力学,2014,35(9):2501-2506.(Zhu Jianming,Zhao Qi. Unified solution to active earth pressure and passive earth pressure on retaining wall considering soilarching effects[J]. Rock and Soil Mechanics,2014,35(9):2501-2506.(in Chinese))
[7]应宏伟,蒋波,谢康和.平行竖墙间的土拱效应与侧土压力计算[J].水利学报,2006,37(11):1303-1308.(Ying Hongwei, Jiang Bo, Xie Kanghe. Soil arching and estimation of earth pressure on two parallel vertical walls[J]. Journal of Hydraulic Engineering,2006,37(11):1303-1308.(in Chinese))
[8]涂兵雄,贾金青.考虑土拱效应的黏性填土挡土墙主动土压力研究[J].岩石力学与工程学报,2012,31(5):1064-1070.(Tu Bingxiong, Jia Jinqing.Research on active earth pressure behind rigid retaining wall from clayey backfill considering soil arching effects[J]. Chinese Journal of Rock Mechanics and Engineering,2012,31(5):1064-1070.(in Chinese))
[9]孙建生.挡土墙土压力研究的错误倾向[J].岩土工程学报,2016,38(7):1324-1329.(Sun Jiansheng.Error tendency for studying earth pressure on retaining walls[J]. Chinese Journal of Geotechnical Engineering,2016,38(7):1324-1329.(in Chinese))
[10]孙建生,王银梅.基于微分层平衡挡土墙土压力曲线分布计算理论研究的谬误[J].土木工程学报,2017, 50(5):114-121.(Sun Jiansheng, Wang Yinmei. Mistake in calculation theory for earth pressure against retaining walls based on differential stratum equilibrium[J]. China Civil Engineering Journal,2017,50(5):114-121.(in Chinese))
[11]刘忠玉,陈捷,李东阳.考虑剪应力作用的刚性挡土墙主动土压力分析[J].岩土力学,2016,37(9):2443-2450.(Liu Zhongyu, Chen Jie, Li Dongyang.Calculation of active earth pressure against rigid retaining wall considering shear stress[J]. Rock and Soil Mechanics, 2016, 37(9):2443-2450.(in Chinese))
[2]高大钊,袁聚云.土质学与土力学[M].北京:人民交通出版社,2006.(Gao Dazhao,Yuan Juyun. Soil science and soil mechanics[M]. Beijing:China Communication Press,2006.(in Chinese))
[3]李军,王贻荪.确定挡土墙主动土压力分布的薄层分析法[J].湖南大学学报,1998,25(5):147-153.(Li Jun,Wang Yisun. Determination of active earth pressure distribution against retaining wall by thin-layer method[J]. Journal of Hunan University,1998,25(5):147-153.(in Chinese))
[4]王元战,李新国,陈楠楠.挡土墙主动土压力分布与侧压力系数[J].岩土工程学报,2005,26(7):1019-1022.(Wang Yuanzhan, Li Xinguo, Cheng Nannan. Active earth pressure on a retaining wall and lateral coefficient of earth pressure[J]. Chinese Journal of Geotechnical Engineering, 2005, 26(7):1019-1022.(in Chinese))
[5]蒋波,应宏伟,谢康和.挡土墙后土体拱效应分析[J].浙江大学学报(工学版),2005,39(1):131-136.(Jiang Bo,Ying Hongwei,Xie Kanghe. Analysis on soil arching behind retaining wall[J]. Journal of Zhejiang University(Engineering Science Edition),2005,39(1):131-136.(in Chinese))
[6]朱建明,赵琦.考虑土拱效应的挡土墙主动土压力与被动土压力统一解[J].岩土力学,2014,35(9):2501-2506.(Zhu Jianming,Zhao Qi. Unified solution to active earth pressure and passive earth pressure on retaining wall considering soilarching effects[J]. Rock and Soil Mechanics,2014,35(9):2501-2506.(in Chinese))
[7]应宏伟,蒋波,谢康和.平行竖墙间的土拱效应与侧土压力计算[J].水利学报,2006,37(11):1303-1308.(Ying Hongwei, Jiang Bo, Xie Kanghe. Soil arching and estimation of earth pressure on two parallel vertical walls[J]. Journal of Hydraulic Engineering,2006,37(11):1303-1308.(in Chinese))
[8]涂兵雄,贾金青.考虑土拱效应的黏性填土挡土墙主动土压力研究[J].岩石力学与工程学报,2012,31(5):1064-1070.(Tu Bingxiong, Jia Jinqing.Research on active earth pressure behind rigid retaining wall from clayey backfill considering soil arching effects[J]. Chinese Journal of Rock Mechanics and Engineering,2012,31(5):1064-1070.(in Chinese))
[9]孙建生.挡土墙土压力研究的错误倾向[J].岩土工程学报,2016,38(7):1324-1329.(Sun Jiansheng.Error tendency for studying earth pressure on retaining walls[J]. Chinese Journal of Geotechnical Engineering,2016,38(7):1324-1329.(in Chinese))
[10]孙建生,王银梅.基于微分层平衡挡土墙土压力曲线分布计算理论研究的谬误[J].土木工程学报,2017, 50(5):114-121.(Sun Jiansheng, Wang Yinmei. Mistake in calculation theory for earth pressure against retaining walls based on differential stratum equilibrium[J]. China Civil Engineering Journal,2017,50(5):114-121.(in Chinese))
[11]刘忠玉,陈捷,李东阳.考虑剪应力作用的刚性挡土墙主动土压力分析[J].岩土力学,2016,37(9):2443-2450.(Liu Zhongyu, Chen Jie, Li Dongyang.Calculation of active earth pressure against rigid retaining wall considering shear stress[J]. Rock and Soil Mechanics, 2016, 37(9):2443-2450.(in Chinese))
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