Bearing Capacity of Defective Reinforced Concrete Pile in Sand-model Study  

作　　者：A.M.Nasr W.R.Azzam K.E.Ebeed 

机构地区：[1]Geotechnical Engineering,Faculty of Engineering,Tanta University,Tanta,Egypt [2]Faculty of Engineering,Tanta University,Tanta,Egypt

出　　处：《Advances in Geological and Geotechnical Engineering Research》2022年第3期1-11,共11页地质与岩土工程研究进展（英文）

摘　　要：Concrete piles that were poorly constructed or analyzed in their soil analyses may have structural or geotechnical defects.To examine such defects,an experimental study was conducted to investigate how a defective reinforced concrete pile behaved.These piles were installed and subjected to a compression axial load in the sand that had relative densities of 30%,60%,and 80%.The tests were performed using four concrete model piles:one intact pile and the other three piles had a structural defect(necking)at three different positions of the pile at(0.25 L from the top,center,and 0.25 L bottom).Geotechnical defect(soft layer or debris)was studied using Styrofoam layer at various vertical distances under the pile toe with Y/D=(0,0.5,1 and 1.5)D.The test results showed that the bearing capacity of the structural defect was the most in the case of a neck at 0.25 L from the bottom,followed by a neck at the center,and finally a neck at 0.25 L from the top.In the case of a geotechnical defect,the bearing capacity of the pile decreased with the decrease of the vertical distance between the soft layer and the pile toe.

关 键 词：Structural defect Geotechnical defect DEBRIS Necking and soft layer 

分 类 号：TU4[建筑科学—土工工程]