Growth of Pile Bearing Capacity over Time Considering the Dissipating of Excess Pore Pressure

详细信息   

• 责任者：Lei Huayang (Department of Civil Engineering ; Tianjin University ; Tianjin 300072 ; China) ; Lü Qianqian
• 刊名：Journal of Engineering Geology
• 出版年：2012
• 卷期：20(5)
• 关键词：孔隙压力 ; pore pressure ; 承载力 ; bearing capacity ; 管桩 ; pipe piles
• 页码：p.815-820
• 图表：3 illus., 2 tables, 15 refs.
• 分类号：1702
• issnNo：ISSN1004-9665
• isbnNo：CN11-3249/P

摘要

The dissipating of excess pore pressure caused by pile sinking is one of the main factors result in time effect of ultimate bearing capacity of pile. This paper discusses the change rule of pile bearing capacity with time through the finite element simulation under the geological conditions of the pile foundation in the second phase project of the free port logistics processing zone in Dongjiang, Tianjin City. It finds that the formula of pile bearing capacity about time effect in dredge fill can be used as reference for engineering use. It also introduces a formula of pile aging bearing capacity in dredge fill.  The results show that the effective range of construction on dredger fill around the pile is 9~10 times the diameter of pile. The excess pore pressure increases with the depth increasing. The closer it from the pile, the greater the excess pore pressure is. The smaller the permeability coefficient of soil is, the more slowly the excess pore pressure dissipates.