SOME PROBLEMS ON DYNAMIC REPLACEMENT METHOD TO IMPROVE SOFT SOIL GROUND
BAI Bing1，XU Huaxuan2，LIU Haibo2，FAN Qianghui2
(1. School of Civil Engineering，Beijing Jiaotong University，Beijing 100044，China； 2. The Sixteenth Engineering Bureau Group Co.，Ltd. of China Railway，Beijing 100044，China)
Abstract：Based on field tests and theoretical analyses，some problems on the dynamic replacement method(DRM) to improve saturated soft soil ground are discussed. These problems include the validity of soils for the DRM，the construction processes and the demands of filling，the evolution of pore water pressure and affecting scopes. Besides，the lateral displacements and deep settlements of soil layers induced by the squeezing effects due to dynamic replacement are also discussed. The formation processes of block stone column and its mechanism with the number of dynamic loading increasing are analyzed. Finally，the variation of bearing capacity of the soft soil foundation improved by DRM is investigated.
