A Model Test on the Behavior of a Static Drill Rooted Nodular Pile Under Compression

作者：Zhou, Jia-Jin; Gong, Xiao-Nan^*; Wang, Kui-Hua; Zhang, Ri-Hong; Yan, Tian-Long

来源：MARINE GEORESOURCES & GEOTECHNOLOGY, 2016, 34(3): 293-301.

DOI：10.1080/1064119X.2015.1012313

• cemented soil
• ABAQUS
• three-dimensional modeling
• model test
• static drill rooted nodular pile
• load transfer mechanism

A static drill rooted nodular pile is a new type of composite pile foundation with high bearing capacity, and mud emissions can be largely reduced using the static drill rooted method. This report presents a model test on the behavior of this composite pile in a test box. The load-displacement response, axial force, skin friction, and mobilized base load are discussed in the report; in particular, the force in the cemented soil was investigated based on the measured data. Moreover, the finite element software ABAQUS was used to help investigate this behavior more thoroughly. It was determined that the function of the cemented soil around the pile shaft was different from that at the enlarged pile base; the stress in the cemented soil around the shaft increased suddenly when nearing the pile base; the ultimate skin friction obtained in the model test was larger than that estimated in the field test; and the relative displacement between the precast nodular pile and the cemented soil could be ignored during the loading process, which corresponded to the result of the field test and demonstrated that the nodular pile and cemented soil act as one entity during the loading process.

• 出版日期2016-4-2
• 单位浙江大学