Settlement Analysis Of Pile-Raft Foundations In High Buildings

After years of development, interaction characters of piles, rafts and foundations are widely applied in engineering practice. Literatures on actual settlement and development process of pile-raft foundations show that substance of pile-raft foundations' settlement consists of many parts and then produces whole compressing distortion. It will take many years or even more years to finish distortion. Because interaction between pile-raft foundations and soil is very complex, what's more, there are many effect factors, piles and caps (or rafts) form a common working system whose bearing capacity and settlement are affected and restricted by interaction between them.The method of computing settlement that code provides is not a pure theoretic method and it is an experiential method in essence. In this paper, based on engineering designs of Taiyuan, in-site experiments, observation data of structure settlement and so on, settlement is analyzed and computed by applying Mindlin stress formula and using software Matlab. The results show that settlement of pile-raft foundations in high buildings is quite little and even. Experience computing coefficients of pile-raft foundations settlement are got, which make design and computation more coincident with engineering practice. Further more, it is reasonable and advanced that rafts share loads with upper structures and knowledge about pile-raft foundations in highbuildings is strengthened. The primary research results of this paper hold great guiding significance and enrich theoretic research of pile-raft foundation.