The Study Of Dynamic Compaction Test Of The Foundation At The 9th Pond In The Labour Exchange Sect Of The Front Seaport Area In Shenzhen

As a kind of economical and efficacious way of ground treatment, which has been widely used in our country. In this paper, taking the engineering foundation at The 9th Pond in The Labour Exchange Sect of The Front Seaport Area in Shenzhen as prototype, the results of point tamp test,the change of foundation Soil habitude before and after dynamic compaction and the observation results of foundation settlement under the stimulant load were deep analyzed. On from some ways hereinafter, and some conclusions were drowned:(1) Determining the requisite parameters for the working dynamic compaction, and its optimizing suggestion was brunt forward.(2) The method for making judgment to the optimal tamp number of foundation, which have silt and sand layer as well as have clay, were analyzed.(3) When there was cushion layer, the material gradation of cushion layer have effect on the tamp energy's transfer.(4) The tamped foundation usually have structural effect,strength effect and deform effect.(5) The deform effect of tamped foundation is that the settlement of the foundation is greatly brunt down.(6) The shake relation in soil which was engendered by dynamic compaction, and the minimum distance which is securable for dynamic compaction engineering.(7) After contrasting the deform stability of each test sub-area, it is sure to that the deform stability of the engineering foundation at The 9th Pond in The Labour Exchange Sect of The Front Seaport Area while be able to meet the demand of design, but must add cushion layer for tamp.