Study On Deformation And Cracking Of A Building In Dianchi Lake Soft Soil Area

There are plateau lacustrine soft soils around Dianchi Lake in Kunming,mainly peaty soils.The physical properties of the soft soils in this area are poor.The specific characteristics are high water content,large void ratio,high compressibility,low severity,and shear strength.Inferior,with thixotropy,rheology and non-uniformity at the same time,so the possibility of engineering geological problems such as uneven settlement is very high.Filling on soft soil foundations,especially uneven filling,will often cause the foundation to sink,float,shift and other deformations,and the stability of the slope formed by the filling of the soil will have a certain impact on the surrounding buildings.This paper investigates the cracking situation of a building in Kunming City,qualitatively analyzes the causes of the cracks,and preliminarily determines that the additional stress of the fill load on the lower soft soil layer causes uneven settlement of the foundation and lateral displacement of the soft soil layer.Then,the specific causes are verified by calculation of foundation soil deformation under additional stress and numerical simulation of soil deformation.The reason for comprehensive evaluation of site failure is the impact of the fill on the soft soil foundation.It is analyzed that the thicker the fill,the greater the settlement of the foundation.The cracks are mostly located in areas where the fill thickness is large and the difference varies greatly.Carry out stability analysis and soil deformation simulation on soft soil slopes to study the causes of deformation and cracking.Provide reference for house design and crack treatment in Kunming soft soil area.