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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

25卷

期数:

2008年03期

页码:

115-121

栏目:

出版日期:

2008-09-20

文章信息/Info

Title:

Deformation Property of Circular Pile and Square Pile in Pile Group Composite Foundation Under Horizontal Load in Multi-layered Soil

作者:

廖丽萍，王启智

四川大学土木工程及应用力学系,四川成都610065

Author(s):

LIAO Li-ping, WANG Qi-zhi

Department of Civil Engineering and Applied Mechanics, Sichuan University, Chengdu 610065, Sichuan, China

关键词:

水平荷载;  圆截面桩;  方截面桩;  分层土体;  变形性状;  数值分析

Keywords:

horizontal load;  circular cross-section pile;  square cross-section pile;  multi-layered soil;  deformation property;  numerical analysis

分类号:

TU473.1

DOI:

-

文献标志码:

A

摘要:

为了在复合地基理论与工程应用中合理地选用桩截面,分别对分层土体群桩复合地基中的圆截面桩与方截面桩在水平荷载作用下的变形性状进行了有限单元法的三维弹性分析,得到了圆截面桩与方截面桩在不同土层材料特性下出现最大应变的位置及其轴向应变性状,以及桩体的断桩点随土体分层状况改变而变化的规律。对计算结果的比较表明,圆截面桩的最大应变均比方截面桩的最大应变大,从而判断出在桩体横截面面积相等的条件下圆截面桩承载力比方截面桩承载力小许多。

Abstract:

To choose cross-section of pile reasonably in the theory and engineering appliance of composite foundation, finite element method was adopted to analyze respectively, in a 3-D elastic analysis, the deformation properties of circular cross-section pile and square cross-section pile in pile group of composite foundation under horizontal load, when different multi-layered soil conditions were considered. The respective property of axial strain for circular cross-section pile and square cross-section pile at the location where maximal strain occurs under different material properties of layered soil was obtained. The variation law for the fracture point of pile which will most possibly occur along with the change of different soil layer conditions was also obtained. Then through comparing the results, maximal strain of circular cross-section pile is higher than corresponding square cross-section pile, it is concluded that the load bearing capacity of circular cross-section pile is much smaller than corresponding square cross-section pile under the condition that both of them have identical cross-section area.

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备注/Memo

备注/Memo:

收稿日期:2008-06-04
基金项目:中国科学院山地灾害与地表过程重点实验室开放基金项目(2007)
作者简介:廖丽萍(1985-),女,广西柳州人,工学硕士研究生,E-mail:qzwang2004@163.com。

常用功能

更新日期/Last Update: 2008-09-20