Calculation method for ground surface settlement outside pit caused by incomplete well precipitation in confined water stratum foundation pit
A technology for confined water and complete wells, which is used in calculations, special data processing applications, instruments, etc. It can solve the problems of low reference value, limited accuracy, and reduced accuracy in another area, and achieve high calculation accuracy, small errors, Calculate the effect of accurate results
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Embodiment 1
[0043] Such as image 3 As shown, this embodiment provides a method for calculating the precipitation curve outside the foundation pit caused by the precipitation in the foundation pit and calculating the surface settlement, including the following steps:
[0044] S1. Carry out the model test design of the precipitation in the foundation pit, and obtain the precipitation curve outside the foundation pit caused by the precipitation in the foundation pit of the confined water formation;
[0045] S2, using the method of fitting to the precipitation curve, obtain the precipitation curve fitting formula outside the foundation pit caused by the precipitation in the foundation pit of the confined water formation, and the fitting formula is:
[0046]
[0047] where h w After the precipitation is stable, the water content thickness of the soil layer outside the foundation pit closest to the retaining wall (h w The water level drop s of the soil layer can be subtracted from the wat...
Embodiment 2
[0078] There are still certain errors in the previous embodiment. Therefore, this embodiment proposes corresponding correction steps. In the confined water formation, due to the influence of the retaining wall, there will be precipitation on one side of the retaining wall, and two areas will appear on the other side , that is, the seepage area and the non-circumvention area. The seepage area is close to the retaining wall and is most affected by the retaining wall. The water flow is characterized by the presence of horizontal and vertical seepage at the same time. The non-infiltration area is far away from the retaining wall. The influence of the retaining wall can basically be ignored, and its water flow characteristic is that there is mainly seepage in the horizontal direction, and seepage in the vertical direction can be ignored. Therefore, it can be seen that the decompression value of the confined water in the seepage area is divided into a vertical decompression value com...
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