Consolidation Effect Factors Of Numerical Analysis

Dynamic compaction, as a simple, rapid, economical soft foundation treatment, is successfully and widely applicable to many types of low unsaturated soil foundation or saturated soil foundation improved the construction conditions. Due to reinforcement mechanism of dynamic compaction is very complex, and the effect factor of reinforcement are too much, so, relative to a large number of engineering practice, the theoretical research of dynamic compaction is not perfect. In this paper, through using the FLAC3D software, on one hand, some of the more important factors influencing reinforcement effect are investigated, on the other hand, stress, displacement and density field are comparative researched which are produced in interior foundation by Impact and Static loading. The contest are as follows:(1) Some aspects are comprehensive discussion, such as reinforcement mechanism、 reinforcement effect and engineering application of dynamic consolidation, the theory、 method.application and development of numerical analysis. Some shortage about dynamic compaction and numerical analysis are summarized.(2) The FLAC3D basic theory and relevant control equation are elaborated, the process of dynamic compaction numerical analysis, parameter setting, numerical model building method are defined.(3) Based on the dynamic numerical analysis model had built, vertical deformation, vertical stress, the effective reinforcement depth, density are used as the reinforcement effect index, through changing rammer diameter, single impact energy (increasing weight of the rammer or drop distance in process), different hammer weight and drop distance with same energy or other process parameters, the reinforcement effect of unsaturated soil is investigated.(4) Based on the dynamic numerical analysis model had built, considering fluid-solid coupling characteristics, the relationship between the permeability coefficient and reinforcement effect in saturated soil is initially investigated, it provide quantitative reference to the research of dynamic compaction theory and on-site construction.(5) Based on the dynamic numerical analysis model and static loading numerical analysis models had built, the displacement, stress, effective reinforcement depth and density are comparative researched which are produced in interior foundation by impact and static load at same same cater depth.