Analysis of settlement of existing buildings caused by unreasonable design of foundation

Abstract

As for the settlement accidents of existing buildings, people pay more attention to the construction quality than the rationality of foundation design. This paper analyzes and discusses the problem of excessive settlement of existing buildings caused by unreasonable design based on three typical engineering cases. The conclusion is that as for the upper filled soil and lower soft soil foundation, the heavy tamping method is not suitable without auxiliary measures if the foundation settlement is strictly controlled; cement-soil mixing pile method is not suitable for high-rise buildings based on soft soil foundation; the foundation design should be based on deformation control when high compressibility soil layer exists, the pile body should penetrate the main compression deformation layer, and the pile end should fall on the good bearing stratum when using pile foundation or rigid pile composite foundation.