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对《给水排水工程管道结构设计规范(GB50332-2002)》等文献中柔性钢顶管顶部竖向土压力标准值的计算公式进行了补充和完善.新导出的计算公式可计入土体黏聚力的作用,能够反映管顶土层对地面荷载的卸荷作用,可用于管顶为多层土的地段;可定量反映出管顶上方不同位置处、不同厚度的硬土层对管顶竖向土压力的减载效果;较原来的计算公式有较大的改进.
The calculation formula of the standard value of the vertical earth pressure on the top of flexible steel pipe roof is supplemented and perfected in the literature of “Code for Design of Pipe Structure of Water Supply and Drainage Project (GB50332-2002)”, etc. The newly derived formula can be included in the cohesion of soil Force can reflect the unloading action of top soil layer on the ground load and can be used for lots with multi-layer soil top. It can quantitatively reflect the top and bottom of the pipe at different positions and different thickness of hard soil layer Loads to earth pressure effect; than the original formula has a greater improvement.