多层土地段钢顶管顶部竖向土压力计算

Analysis of vertical soil pressure for steel conduit jacking in multilayered soil plat

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 formula for analyzing vertical soil pressure on steel conduit jacking in Structural design code for pipelines of water supply and waste water engineering(GB50332-2002),etc.,is perfected. New formula can analyse the effect of soil cohesion, reflect the unloading effect of the soil over steel conduit in allusion to surcharge load, be applicated for the area where is multilayered soil over the conduit, and also can quantitatively reflect the unloading effect of orterde over the conduit. The new formula is ...