经典土压力理论及其应用的合理性分析

Rationality of classical earth pressure theories and their utilization

对朗金土压力理论和库伦土压力理论这两个经典土压力理论及其应用的合理性进行了详细的分析.分析结果表明:朗金理论和朗金型理论在事实上是不成立的;库伦理论是不严密的,需增加土体均质、无附加荷载及土体表面为平面的3个条件,由于通过墙踵的破裂面不可能是平面,因此,在现实条件下,用库伦理论和库伦型理论计算土压力是一种近似计算;传统土压力概念不适用于边坡支护结构设计.

Rationality of two classical earth pressure theories （Rankine earth pressure theory and Coulomb earth pressure theory）and their utilization are in details analyzed. The result indicates that Rankine earth pressure theory is not tenable. Coulomb earth pressure theory is imprecise and needs adding, the conditions of symmetrical soil and the planar surface of earth without additional load on it. In the practical condition, Coulomb earth pressure theory is the one for approximate calculation of earth pressure because it is impossible that fracturing surface through the heel of the retaining wall is planar, traditional earth pressure concept is inapplicable to the slope retaining structure.