The Study On Bearing Capacity Of Excavation Pile Which Firmed By The Deep Plate-load Test

Mechanism and settlement of excavation pile in the vertical load were experimentally studied.The behavior of the shaft resistance and base resistance of excavation pile is analyzed.This perfert the present measure of bearing capacity which firmed by the deep plate-load test and put forward further theory evidence.Based on the behavior of excavation pile and the data of field test or plate-load test,proportional relations between the shaft resistance and base resistance of excavation pile in the different load is introduced in this paper;The paper researches the changing rules between base resistance and settlement of pile bottom,FLAC-3D is set up to reveal the characteristics of the shaft resistance and settlement of pile under,find out the laws under the different semidiameter,length and soil.Combine field test analysis with simulation test analysis,turn up the relational expression of field test settlement and deep plate-load test settlement,besides point out the distribution function of shaft resistance from theoretical derivation; Use the relational expression and the distribution function together,change the "Q-S"curve of plate-load test to the "Q-S"curve of field test,calculate the shaft resistance by the base resistance.Finally combine formula with the result of load test, perfect deep plate-load test method on the excavation pile.