Test study and numerical analysis of stability of high-level cap steel tubular pile under compression loads

被引：0

作者：

Jia Qiang ^{[1
]}

Zheng Ai-ping ^{[1
]}

Zhang Xin ^{[1
]}

机构：

[1] Shandong Jianzhu Univ, Shandong Prov Key Lab Appraisal & Retrofitting Bl, Jinan 250013, Shandong, Peoples R China

来源：

ROCK AND SOIL MECHANICS | 2011年 / 32卷 / 06期

关键词：

steel tubular pile; effective length factor; buckling analysis; underpinning;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Steel tubular pile underpinning technology is an effective method to develop underground space in retrofitting of existing buildings. The bottom of steel tubular pile inserted into concrete pile while top connected with underpinning cap. The stability of the pile under compression load decreased after the soil around the pile dug, but the stability coefficient and length factor of steel tubular pile can not be obtained by currently code. According to the 1: 2 model test and nonlinear buckling analysis respectively, the stress distribution and the ultimate bearing capacity of the pile is derived. The effective length factor for stability calculation is 0.616 gotten by test study; and the numerical result is 0.683. So the pile is restricted with base edge fixed and top edge articulated. More safety stability of the pile can be obtained by buckling numerical analysis which can provide reference for pile design.

引用

页码：1736 / 1740

页数：5