摘要
在填土水平且无粘性条件下,分析垂直墙背挡土墙的主、被动土压力分布。通过研究极限状态土体内主应力拱的应力,得到挡土墙的土压力系数。取滑动土楔内水平薄层土体单元进行分析,推求挡土墙土压力的分布及合力的计算公式,并用试验结果验证。研究表明,本文所得土压力合力与库仑解相等,但土压力分布并非直线,主动土压力的合力作用点高度大于三分之一墙高,而被动土压力的合力作用点高度小于三分之一墙高。
The authors analyzed the earth pressure distribution on retaining wall with a vertical back in the condition of a granular backfill with level surfaces.Based on the study of the limiting state stress in principal stress arch,the coefficients of the active and passive earth pressure were obtained.A level thin layer element taken from sliding earthwedge was analyzed.Formulae of earth pressure distributions and the resultant earth pressure were derived and verified with experiments.It shows that the resultant pressures calculated by using the formulae are equal to those using Coulomb Theory.However,the earth pressure distributions are not linear.The height of acting point of the resultant active pressure is higher than 1/3 of the retaining wall height,but the height of acting point of resultant passive pressure is lower than 1/3 of the retaining wall height.
出处
《水利学报》
EI
CSCD
北大核心
2003年第2期102-106,共5页
Journal of Hydraulic Engineering
关键词
垂直墙背挡土墙
土压力
分布
主应力拱
retaining wall
earth pressure distribution
principal tress arch
