Study of the Force and Deformation Characteristics of Subsea Mudmat-Pile Hybrid Foundations

Polish maritime research

Desen Kong^1,2¹  Meixu Deng^1,2²  Yi Liu^1,2³ 

[1] College of Civil Engineering and Architecture, Shandong University of Science and Technology,, Shandong, China^1;Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology,, Shandong, China^2;Shandong Xingke Intelligent Technology Co., Ltd.,, Shandong, China^3

关键词: Subsea Mudmat-pile Hybrid Foundations;    force characteristics;    deformation characteristics;    combined loads;   

DOI  :  10.2478/pomr-2018-0111

学科分类：工程和技术（综合）

来源: Politechnika Gdanska * Wydzial Oceanotechniki i Okretownictwa

【 摘 要 】

To study the force and deformation characteristics of subsea mudmat-pile hybrid foundations under different combined loads, a project at a water depth of 200 m in the South China Sea was studied. A numerical model of a subsea mudmatpile hybrid foundation is developed using the numerical simulation software FLAC3D. The settlement of the seabed soil, the bending moments of the mudmat, and the displacements and bending moments along the pile shaft under different load combinations, including vertical load and horizontal load, vertical load and bending moment, and horizontal load and bending moment load, are analyzed. The results indicate that settlement of the seabed soil is reduced by the presence of piles. The settlement of the mudmat is reduced by the presence of piles. Different degrees of inclination occur along the pile shaft. The angle of inclination of pile No. 1 is greater than that of pile No. 2. The dip directions of piles No. 1 and No. 2 are identical under the vertical load and bending moment and are opposite to those under the other combined loads. The piles that are located at the junctions between the mudmat and the tops of the piles are easily destroyed.

【 授权许可】

Unknown