【摘要】 临界填土高度是高速公路工程中一个非常重要的问题,当路堤施工期填筑高度小于临界填土高度时,路堤的施工期稳定就能得到保证,因此,临界填土高度的研究对高填方路基的设计与施工具有重要的理论意义与实用价值。基于统一双剪强度理论,对路基的施工期稳定性评价方法进行了探讨与分析,并给出了考虑中主应力影响下的路基临界填土高度的计算公式。采用该方法对京珠高速公路某合同段高填方路基临界填土高度进行了实例分析计算,并对基于统一双剪强度理论和Mohr-Coulomb准则的临界填土高度计算结果进行了对比分析。更多还原

【Abstract】 Critical filling height is an important problem in expressway engineering.When embankment filling height in construction is less than critical filling height,stability of embankment in construction can be ensured.Accordingly,the research of critical filling height have important theoretical implications and practiceal values for design and construction of highway thick filling area.On the basis of the twin shear unified strength theory,stability analysis method in the construction of thick filling area is discussed and analyzed in this paper.Last,calculateion formula of critical filling height for highway thick filling area considering influence of intermediate principal stress is given in the paper.A practical example for analysis and computation of critical filling height in a contract section in Jing-Zhu Expressway is presented,the computational results are compared against those based on the Mohr-Coulomb criterion and on the twin shear unified strength theory.更多还原