Settlement Analysis and Case Study of Diaphragm Wall and Friction Pile-Box (Raft) Foundation on Super High-Rise Building

Abstract

The calculative theory of settlement and analysis of measured settlement for pile-box (raft) foundation of general high-rise buildings and middle high-rise buildings have got rich achievement. Some research results of Chinese experts have reached internationally advanced level, such as Professor Xihong Zhao, Professor Jianguo Dong, Professor Yang Min, Professor Zhu Baili, Professor Hong Yukang and Professor Chen Zhuchang of Tongji University; Academician Huan Xiling, Researcher Liu Jinli and Huang Qiang of China Academy of Architectural Engineering; Academician Zhou Jing of Railway Institute of Science and Technology; Academician Shen Zhujiang of Water Conservancy Institute of Nanjing; Chief Engineer of Civil Design Institute of Shanghai: Huang Shaolou. But the interaction between diaphragm wall and friction pile-box (raft) foundation and the settlement analysis concerning the interaction haven’t been considered in these results. Furthermore, a large number of these super high-rise buildings are lesser then 100m in height. There is little study result for super high-rise buildings higher than 150m. So far, there are only 12 super high-rise buildings exceeding 200m, 3 buildings exceeding 300m, and only one building exceeding 400m (It is Jinmao Tower, which is 395m in fact, not beyond 400m). So it could be said that the action of diaphragm wall is not involved in the analysis of foundation settlement of these super high-rise buildings. In addition, because of various reasons, the measured settlement data and analysis of these super high-rise buildings is scarce. So the settlement data of engineering case is very valuable, not only at present but also in the future. In this chapter, there is no discussion on various calculation methods or calculation cases, and emphasis is laid on the analysis of effect of diaphragm wall on settlement calculation, study is conducted on the settlement calculation principle and method of friction pile-box (raft) foundation, and then study and analysis is conducted on measured settlement data of Senmao Tower and Jinmao Tower of Shanghai, which can get useful result for further settlement study.