强夯加固深度的试验研究

Model Test of Improvement Depth of Dynamic Compaction

利用读数显微镜位移跟踪法 ,对黄土进行强夯半模试验 ,分析了各参数如夯击能、锤重、落距、击数、夯锤直径、夯点间距对强夯加固范围的影响 ,得出了加固深度的计算公式H =W2 / 3 ·h·N10D·γd·(1- ω) 。又对强夯机理进一步进行了分析 ,将其分为松散体、扰动体。

A series of half-model tests of dynamic compaction of loess is carried out by displacement tracing method with microscope. The relationship between satisfactory improvement depth and the main factors such as temping energy,tamper weight,drop height,drop numbers,tamper diameter,grid spacing,dry density and water content of filling soil is draw out. A formula of satisfactory improvement depth H=W 2/3·h·N10D·γ d·(1-) is obtained. The mechanism of dynamic compaction is analyzed and divided into four stages.