Experimental Studies on Modified Suction Caissons in Fine Sand Subject to Uplift Loading  

作　　者：Hanbo Zhai Dayong Li 

机构地区：[1]College of Civil Engineering and Architecture, Shandong University of Science and Technology [2]School of Civil Engineering, Tianjin University [3]College of Civil Engineering, Fuzhou University

出　　处：《Transactions of Tianjin University》2017年第6期562-569,共8页天津大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(nos.51379118 and 51639002);SDUST Research Fund(no.2015TDJH104)

摘　　要：A modified suction caisson (MSC), which was reported by the authors of this paper previously, comprises an external short-skirted structure that is added to a regular suction caisson (RSC). It has been proved that MSCs can improve the lateral bearing capacity and limit the deflection of the caisson compared with RSCs. A series of model tests were conducted to investigate responses of MSCs subject to uplift loading in saturated sand. The effects of external skirt dimensions on the uplift bearing capacity of MSCs were considered. In addition, the influences of the sealed top lid of the skirted structure on the uplift bearing capacity and the resulting passive suction of MSCs were also studied. It was found that the uplift bearing capacities of MSCs are 1.4–1.7 times that of RSCs. Moreover, test results in serviceable conditions show that the sealed external skirted structure of perspex-made suction caissons significantly contributed to the uplift bearing capacity as a result of passive suction. © 2017 Tianjin University and Springer-Verlag GmbH GermanyA modified suction caisson(MSC), which was reported by the authors of this paper previously, comprises an external short-skirted structure that is added to a regular suction caisson(RSC). It has been proved that MSCs can improve the lateral bearing capacity and limit the deflection of the caisson compared with RSCs. A series of model tests were conducted to investigate responses of MSCs subject to uplift loading in saturated sand. The effects of external skirt dimensions on the uplift bearing capacity of MSCs were considered. In addition, the influences of the sealed top lid of the skirted structure on the uplift bearing capacity and the resulting passive suction of MSCs were also studied. It was found that the uplift bearing capacities of MSCs are 1.4-1.7 times that of RSCs. Moreover, test results in serviceable conditions show that the sealed external skirted structure of perspex-made suction caissons significantly contributed to the uplift bearing capacity as a result of passive suction.

关 键 词：Bearing capacity CAISSONS FLOWCHARTING FOUNDATIONS Offshore wind turbines Pressure vessels Wind turbines 

分 类 号：TU476[建筑科学—结构工程]