特殊截面抗滑桩受力特征与土拱效应分析

文兴; 裴向军; 刘云鹏

特殊截面抗滑桩受力特征与土拱效应分析

地质灾害防治与地质环境保护国家重点实验室成都理工大学成都 610059

基金项目:

科技部支撑计划(2011BAK12B03)资助

详细信息

作者简介:
文兴,主要从事工程地质方面的研究.Email:rleehom@gmail.com

中图分类号: P642.22
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- 文章访问数: 3588
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出版历程
- 收稿日期: 2013-02-19
- 修回日期: 2013-08-20
- 刊出日期: 2013-10-24

STRESS CHARACTERISTICS AND SOIL ARCH EFFECT ANALYSIS OF ANTI-SLIDING PILES WITH SPECIAL CROSS-SECTION

State Key Lab of Geological Hazard Prevention and Geological Environment ProtectionChengdu University of Technology, Chengdu 610059

摘要

摘要: 对于传统矩形截面抗滑桩的受力而言,由于混凝土抗压不抗拉的力学性质,使截面受拉区的混凝土没有发挥出最大效用。通过对矩形截面形状的改变,即把受拉区面积减小和受压区面积增大,进一步利用了混凝土在截面中的抗压性能,使得抗滑桩截面的抗弯承载力和抗弯刚度都得到了提升,并通过计算,验证了此说法。截面形状的改变,也使得桩间土拱受力发生了改变,即从以前的一个土拱,变为了由一个主要拱和一个次要拱来共同承担,对桩间土拱效应有一定增强。通过对矩形截面和特殊截面抗滑桩的数值模拟对比分析,论证了桩间土拱效应在截面改变后得到增强的观点,也表明特殊截面抗滑桩降低了土体从桩间滑出的可能性,可为抗滑桩的传统设计提供理论参考。
- 抗滑桩 /
- 截面设计 /
- 抗弯承载力 /
- 抗弯刚度 /
- 土拱效应
Abstract: Conventional anti-sliding piles have rectangular cross-sections. Their concrete in tension part cannot give the best performance due to concrete has low tensile strength. This paper redesigns the rectangular cross-sections by decreasing the tensile area and increasing the compressive area. The compression strength of the concrete can get better use. For that, the flexural capacity and flexural rigidity of the pile cross-sections can be enhanced. The soil arch effect can also be enhanced. This paper further presents the contrastive analysis of the numerical simulation of the piles with rectangular cross-section and special cross-section. The results confirm that the soil arch effect is enhanced. They also show that the pile with special cross-section has reduced the soil from the possibility of slip out. This article can provide theoretical reference for the anti-slide pile design.
- Anti-slide pile /
- Cross-section design /
- Flexural capacity /
- Flexural rigidity /
- Soil arch effect

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参考文献(1)

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