Settlement Law of Composite Soft Soil Foundation Under Pile-loading

For the soft soil foundation reinforcement project in the Pearl River Delta region, the soft soil foundation is reinforced by the two processes of"first stacking then piling" and "first piling then stacking" at the test site, and the settlement is monitored during the test. The experiment explores the vertical deformation law of soft soil foundation under two kinds of process conditions. According to the settlement monitoring data, it is found that the settlement curve of the soft soil foundation treated by the two processes in the "settlement rapid decline stage" satisfies the polynomial function relationship, and the settlement curve of the "settlement tends to stabilize stage" satisfies the logarithmic relationship. The settlement model can properly reflect the soft foundation settlement law after the two treatment processes. At the same time, by studying the relationship between the horizontal distance from the centerline of the stacking area and the settlement increment, it is found that the soft soil foundation is affected by the preloading reinforcement or pile-stacking after mixing pile. The range curve satisfies the logarithmic relationship to a certain extent, so that the degree of influence of the load on the different positions of the soft foundation can be grasped, which facilitates the construction planning. The above research results can provide reference for studying the settlement law of soft soil foundation in the Pearl River Delta region, and can also be used to guide the design and construction of soft soil foundation engineering. © 2021, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.