摘要
文章针对挡土墙后粘性填土分层的情况,分析层分法计算粘性填土主动土压力在实际工程中出现的问题。在结合层分法进行改进的基础上,推导了土压力曲线分布公式及开裂深度计算式,并通过算例进行验证,得出墙后填料为两种粘性土时应采取的正确填筑方法。
Considering the fact that the cohesive backfills behind retaining wall are always layered in practice and the main problems which exist when using the method of layer analysis to calculate the active earth pressure on retaining wall with cohesive backfills（The crack depth calculated is much bigger;Value of earth stress near the top of wall is negative）, the method of layer analysis is studied and improved.A nonlinear formula about distribution of the active earth stress on retaining wall with cohesive layered backfills,which can avoid the result of negative earth stress near the top of wall, and a crack depth formula are deduced and proposed.Then the rationality of the improved method of layer analysis is validated by an example.The results indicate that the crack depth calculated with the improved method of layer analysis is less and the active earth pressure and the overturning moment are bigger than the results calculated with the non-improved method; Compared with Generalized Coulomb Theory（Cracks are considered）,the results of the active earth pressure of the both method are nearly equal, but the former＇s overturning moment is bigger.In addition, another example is used to analyze the appropriate measure of backfilling as the layered backfills are two kinds of cohesive soils.
出处
《西部交通科技》
2009年第2期22-28,32,共8页
Western China Communications Science & Technology
关键词
挡土墙
改进层分法
主动土压力
分层粘性填土
非线性
The improved method of layer analysis
Active earth pressure
Cohesivelayered backfills
Nonlinear
Retaining wall
