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前言用强夯法加固饱和软土地基(特别是饱和粘土和亚粘土)国内外看法不一。从一些工程实践结果来看,这类土往往不易取得理想的效果。从内因看这类土的粘粒、粉粒含量大,渗透系数小,且处于流动状态,在强大的夯击能量作用下,按梅纳理论应在夯击点周围产生竖状裂隙使孔隙水消敞,从而达到动力固结的目的,但由于土软,加之夯击引起很大的侧向应力,这些裂隙即使存在也是瞬间的,孔隙水很难排出,影响了夯击效果。从外因分析是没有正确的选择施工参数及施工方法。国内外不少单位研究为软土地基创造排水条件,开始有用砂井排水,但因夯击时土
Introduction There are different opinions at home and abroad on strengthening saturated soft clay foundations (especially saturated clays and sub-clays) by using the dynamic compaction method. From the results of some engineering practices, this type of soil is often not easy to achieve the desired results. Seen from the internal factors, this type of soil has a large content of cohesive and powder particles, a small permeability coefficient, and is in a flowing state. Under the action of strong slamming energy, according to the Menner theory, vertical cracks should be generated around the slamming point to make pore water. The purpose of dynamic consolidation is to eliminate the air, but due to the soft soil and the large lateral stress caused by the slamming, these cracks are instantaneous even if they exist, and the pore water is difficult to discharge, which affects the slamming effect. The analysis of external factors is not the correct choice of construction parameters and construction methods. Many units at home and abroad have studied the creation of drainage conditions for soft soil foundations and began to use sand well drainage, but due to slamming