The deformation of thick raft and contact pressure have been measured and the deformation characteristics of thick raft plinth under tall buildings described.

The deformation of thick raft and contact pressure have been measured, proving the principle of superposition can be used to calculate the deformation and contact pressure of frame structure with large thick raft under twin tower buildings.

Discussion on design method of raft foundation;

Combined with one practical project in which the CFG pile composite ground was adopted,the design method of CFG pile composite ground of column-raft foundation is elaborated with the foundation rigidity and load distribution considered in order to make safe,economical and rational ground and foundation plan.

The design and calculation of raft foundation,the topic of whether to remain the permannent building separation for settlement between mair buildings and podiums,the piling design,and calculation for base settlement are introduced.

The water-proof and permeability-proof processing methods on the line of gap settement for raft foundation are discussed when it is under the groundwater level.

In order to make use of the underground space well, thick raft foundation is adopted more.

According as the quality control method of the project supervision,link to the actual bearing capacity speciality of big volume raft foundation and the mechanics theory,the author according to the self fulfillment,summarizing and discussing quality reference point of this type structure as developing supervision task.