Research And Application On Dynamic Consolidation Pretreatment Technique Of Saturated Soft Soil

Based on the practice of the Guangdong Science Center saturated soft soil ground treatment, the dynamic consolidation pretreatment technique in saturated soft soil ground has been discussed in this paper. To research the results and the reasons which are connected with the technique, some normal experiments and microstructural experiments have been conducted. The main contents of this paper include:1. Some trial methods such as the pore-water pressure monitor, the earth's surface settlement monitor, the soil pressure monitor, the standard-drive-into experiment, the load experiment, the laboratory soil experiments have been done to discove the results and the reasons which due to the use of the dynamic consolidation.These experiments shown the dissipation speed of pore-water would be speeded for the shorten path meliorate the drain conditionalwas built, and the settlement after pretreatment would decline, and the strength of the soil ground would increase, and the liquation of sand would be ease or dissapear. As a result, the main reasons which affect the results were discussed.2. The micro-structure analysis technique(MSA) of saturated soft soil, which consists of vacuum-freeze-sample-made technique with the liquid nitrogen(LNVFSM), the scan electronic microscope technique (SEM),the image processing, analysis and computer vision technique(PAV), has been discussed. With the MSA technique, 46 samples of saturated soft soil have been made, 95 digital pictures which include 49 pictures of 3000 times and 46 pictures of 300 times have been taken. According to the analysis of 300 times pictures, 46 groups microstructural parameters which consist of 9 parameters such as the porosity, the hole complications and so on.