Numerical modeling of field stamp tests, the influence of boundary conditions of the soil mas-sif on the settlement of the stamp during model-ing.
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Abstract
The influence of the geometric dimensions of the calculated area of the soil mass on the stamp settlement in clay soils is studied. The ratio between the size of the soil mass in the plan and by depth is determined. The relationship between the size of the soil mass and the size of the stamp is established. And also, it is investigated how its position affects the settlement of the stamp. Several situations were simulated for this purpose. One of these situations is when full-scale tests are performed on the soil surface. According to this condition, our first task is a finite element model with the stamp location on the surface of the soil mass. Another situation is when stamp tests are performed in the pit. According to this condition, our second task is a finite element model with the stamp location in the pit. The results of field stamp tests of bluish-gray, semi-solid clay in the pit of a construction foundation ditch are presented. The absolute mark of the foundation ditch bottom is 114.3, and the absolute mark of the pit bottom is 110. The tests were carried out at one of the construction sites of the housing and office complex in Kyiv. A schematic diagram of the installation of these stamp tests and the scheme of stamp tests with reference to the geological section, and a graph of the dependence of the stamp precipitation on the specific pressure are also provided. The paper compares the results of numerical simulation with full-scale tests. This is presented in the form of tables and graphs. Due to the large number of calculation results obtained. To systematize them, the tables show the values of the stamp precipitation for the last load stage. And the graphs show the results of numerical modeling for all degrees of load. At the same time, only graphs for characteristic ratios of the soil massif size were displayed.
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References
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