Abstract

Info

Title:: Experiment on Variation Characteristics of Excess Pore Water Pressure During Pervious Concrete Pile Construction

Author(s):: SONG Xiu-guang; YU Yi-fan; ZHANG Hong-bo; GE Zhi; School of Civil Engineering, Shandong University

Keywords:: foundation engineering; excess pore water pressure; field test; pervious concrete pile; vibrating sinking pipe; silt

Abstract:: In order to reveal change regulation of excess pore water pressure during pervious concrete pile construction, excess pore water pressure of soil around the pile changing with time, radial distance and depth were monitored and analyzed during and after single pervious concrete pile construction by vibrating sinking pipe through the method of burying pore water pressure gauges in the field, and the effect of single pervious concrete pile construction on foundation around the pile was analyzed according to the monitoring results. The results show that excess pore water pressure of soil around the pile reaches maximum after sinking pipe and afterwards dissipates quickly for silt foundation with high groundwater level. The time of excess pore water pressure disappearing completely is very short. The rates of rise and decrease of excess pore water pressure are faster where it is closer to the pile. The excess pore pressure decreases approximately in radial direction and depth. The excess pore water pressure at same depth of each moment is larger where it is closer to the pile. The spatial distributions of liquefaction scope and reinforcement scope are about a funnel shape. The proposed construction technology suitable for pervious concrete pile can provide reference for design and construction of similar engineering.