冲击荷载作用后软粘土的再固结

Re consolidation of Saturated Soft Clay after Impact Loading

围绕“动静结合排水固结法”课题，对冲击荷载作用下软粘土性状进行了试验研究，重点分析了排水条件对土体固结和再固结的影响。指出孔压上升与再固结体应变的唯一性关系，这为饱和软粘土地基在冲击荷载作用下附加沉降量的计算提供了一个简单的思路。并指出经多遍冲击再固结土体的强度可大大提高。

For the subject on drainage consolidation method of combining static and dynamic loading, the deformation characteristics of saturated soft clay under impact loading are studied by laboratory tests, and the influences of drainage conditions on consolidation and re consolidation of soft clay are analysed in detail. The uniqueness of the relationship between pore water pressure and re consolidation volumetric strain is pointed out, and a simple method for the additional settlement calculation of soft clay foundation after impact loading is provided. Finally, it is demonstrated that the shear strengthes of re consolidation of soft clay after several impact loadings can be increased greatly.