Abstract
For the layered ground in a large area, the deformation under uniform load is analyzed numerically. Considering the work property of the concrete plane, the uneven settlement is strictly restrained using different foundation. In the process of settlement calculation, according to the linear interpolation of multiple borehole elevations, the geological profiles with different soil layer thickness are formed, and the influence of compressed soil layer thickness on the total settlement and uneven settlement is fully considered.
Highlights
In this paper, considering the influence of different thickness of compression layer of layered foundation, the settlement deformation of test hall foundation under large-area service load is studied, and the causes and changes of uneven settlement are mainly analyzed
2.2 Soil distribution According to the drilling data, it can be divided into ten layers from top to bottom, mainly including plain fill 1, muddy clay 2a, silty clay 2b, muddy clay 2c, silty clay 2D, silty clay 3, silty clay 4a, silty clay 4b, silty clay 4c and clay 5a
It can be seen that the main factor affecting the uneven settlement of the surface is the uneven thickness of the stratum compression layer
Summary
According to the general plan and borehole layout, the floor of a test hall is a large-area concrete structure. According to the geological survey report, the foundation compression layer within the test hall is large and uneven in thickness, which is easy to produce uneven settlement. In this paper, considering the influence of different thickness of compression layer of layered foundation, the settlement deformation of test hall foundation under large-area service load is studied, and the causes and changes of uneven settlement are mainly analyzed. If the elevation of the concrete floor, i.e. the original ground, is taken as the analysis object, the fill on both sides, the service load and the concrete floor are regarded as the large-area uniform load: 1) The weight of the concrete floor within the pool; The thickness of the concrete floor is 0.2m, the unit weight is 26kN/m3, which is above the groundwater level, so the uniform load of the concrete floor is 5.2kpa. Refer to the code for design of building foundation (GB 5007-2011), the unit weight, compression modulus and compression coefficient are taken as the arithmetic average value, and the shear index is taken as the standard value
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