Laboratory Model Test and Analysis of Excess Pore Water Pressure Dissipation of Pile Driven by Tapered - Perforated Tubular Pipe Pile

Abstract

Through methods based on the indoor model test, the use of static pressure pile with three different hole arrangement and three different kinds of taper cone - bore log shape composite pipe pile bored into soil by static pressure,and after observing the excess pore water pressure caused by pile driving when testing, and analyzing the process of various pipe pile static pressure, the change rule of the excess pore water pressure varying with taper hole arrangement, size, radial distance, pile depth has been gotten. It is found that stellate shape has the best dissipation rate of excess pore water pressure under the condition of hole arrangement and taper 1/70, which is of certain guiding significance for promoting the engineering application of tapered - perforated tubular piles.