上埋式管涵竖向土压力计算方法

Calculating Method of Vertical Earth Pressure for Positive Buried Culvert

基于马斯顿理论、曾国熙公式、顾安全公式与有限元法,利用计算机仿真技术模拟地形条件、土性参数建立上埋式管涵模型,并根据工程实际进行算例分析、计算结果表明,竖向土压力集中系数广泛存在于涵洞工程中,尤其在高填土中不容忽视,马斯顿理论和曾国熙公式对高填土不适用,结合顾安全公式和有限元分析,能较为准确地评价分析涵洞受力。

Based on Marsden theory,Zengguoxi formula,Gu＇anquan formula and finite element method,and using the computer simulation technology,the typical example combined with practical situation was analyzed by building the positive buried culvert model,which was used to simulate terrain conditions and parameters of soil property.The result indicates that concentration factor of vertical earth pressure exists widely in culvert projects, which especially can＇t be neglected in the highly filled culvert,so Marsden theory and Zengguoxi formula aren＇t applicable to the highly filled culvert,but they can accurately evaluate the force exerted on the culvert when combined with Gu＇anquan formula and finite element analysis.