摘要
从基本假定、判定条件、计算模式等方面,归纳并比较了几种前人提出的有限土体主动土压力计算方法,并且通过一个实例,将各种方法的计算结果与朗肯方法计算结果进行对比,发现在一定深度范围内,有限土体土压力表现出小于朗肯土压力的趋势。随着计算深度的增大,有限土体土压力计算结果呈非线性增长,且增长幅度渐渐变小;对于单层砂土,有限土体土压力计算结果普遍小于或接近朗肯方法计算结果;但对于单层粘性土,在浅部有限土体土压力计算结果大于朗肯方法计算结果,随着深度的增加计算结果才逐渐减小。最后应用Geo X软件,给出了一个使用北京市地方规范方法计算有限土体主动土压力从而计算排桩位移及内力的算例。
Some methods of active soil pressure from finite soil body presented by predecessors are summarized and compared from the aspects of the basic assumption, determination condition and computational mode. Through an example the calculation results from various methods and the results from Rankine's method are compared,and it is founded that in a certain depth range,the soil pressure from finite soil body shows the trend of less than Rankine's soil pressure. As computing depth increases,the calculation results of the soil pressure from finite soil body increase non-linearly and the growth rate gradually decreases. For one-layer sand,the calculation results of the soil pressure from finite soil body generally are less than or close to the results of Rankine's method,but for one-layer cohesive soil,the calculation results of the soil pressure from finite soil body are greater than the results of Rankine's method in the shallow position and the results gradually reduce with the increasing depth. Finally,by using software Geo X,the calculation of the active soil pressure from finite soil body by using Beijing code is presented to calculate the displacement and internal force of soldier pile wall.
出处
《工程勘察》
2015年第1期20-25,共6页
Geotechnical Investigation & Surveying
关键词
有限土体
主动土压力
滑楔体理论
小变形
极限状态
finite soil body
active soil pressure
wedge theory
small deformation
critical state
