考慮滲流時水泥土墻支護結構計算與分析
[Abstract]:At present, the design of cement-soil wall is still based on the traditional gravity retaining wall. The static water pressure is adopted and the influence of seepage is not considered. However, when excavation of foundation pit is carried out in areas with high groundwater level, it is necessary to degrade the foundation pit. The suspended water sealing curtain makes the water head difference inside and outside the pit, and seepage will occur in the soil, and a large number of examples of foundation pit engineering show that, The influence of seepage on soil and water pressure distribution and stability of foundation pit support structure is very significant, but there are few researches on foundation pit engineering characteristics considering seepage at present. In this paper, the finite element software ABAQUS is used to simulate the cement-soil wall under steady seepage, and the influence of steady seepage on the pressure and stability of soil and water wall is preliminarily studied. The main research contents are as follows: 1. On the basis of a brief introduction of the finite element control equation and the definite solution conditions of saturated steady seepage, the variation of water pressure before and after the action of cement earth wall is analyzed and compared with that of hydrostatic pressure. From the aspect of water pressure, the necessity of considering steady seepage flow is proved. The finite element software ABAQUS is used to simulate the steady seepage in the cement-soil wall supporting structure. The results show that the earth pressure in the cement-soil wall under steady seepage is greater than that in the pit or outside the pit without considering the seepage. However, for the water pressure, the water pressure in the cement soil wall is smaller than that in the static water pressure because of the seepage force, and the water pressure outside the cement soil wall is greater than the hydrostatic pressure. On this basis, the influence of steady seepage on the stability of cement soil wall is studied. The results show that the stability of cement soil wall is unfavorable to the stability of cement soil wall under steady seepage. It is not safe to design without considering seepage.
【學位授予單位】:河北工程大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TU476
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