[1]康银庚.硅藻土地层钻孔灌注桩承载特性研究[J].高速铁路技术,2023,14(04):30-34.[doi:10.12098/j.issn.1674-8247.2023.04.006]
 KANG Yingeng.A Study on Bearing Capacity of Bored Piles in Diatomite Stratum[J].HIGH SPEED RAILWAY TECHNOLOGY,2023,14(04):30-34.[doi:10.12098/j.issn.1674-8247.2023.04.006]
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硅藻土地层钻孔灌注桩承载特性研究()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
14卷
期数:
2023年04期
页码:
30-34
栏目:
出版日期:
2023-08-30

文章信息/Info

Title:
A Study on Bearing Capacity of Bored Piles in Diatomite Stratum
文章编号:
1674-8247(2023)04-0030-05
作者:
康银庚
中国铁路设计集团有限公司,天津 300308
Author(s):
KANG Yingeng
China Railway Design Corporation ,Tianjin? 300308 ,China
关键词:
硅藻土地层静载荷试验极限摩阻力承载特性
Keywords:
diatomite stratumstatic load testultimate friction resistancebearing capacity
分类号:
TU473.1+6
DOI:
10.12098/j.issn.1674-8247.2023.04.006
文献标志码:
A
摘要:
依托杭台高速铁路工程,在硅藻土地区开展了钻孔灌注桩静载荷试验,获得了硅藻土地层中灌注桩承载特性及相关力学参数,结果表明:(1)在静载试验条件下对桩身应力变形进行测试,得到了硅藻土地层灌注桩桩身荷载传递的基本规律;(2)通过对桩身轴力和侧摩阻力的计算,得到了白色、兰色和黑色3种硅藻土的极限摩阻力;(3)3种硅藻土的极限摩阻力与基本承载力间并非线性对应关系,兰色硅藻土虽具有较好的抗压性能,但其抗摩擦性能并未大幅度提高;(4)工程设计中桩端应尽量避免设置于硅藻土地层中。研究成果可为硅藻土地层桩基或类似工程的设计参数取值提供参考。
Abstract:
Based on the Hangzhou-Taizhou high-speed railway project,a static load test was carried out on bored piles in diatomite stratum to obtain their bearing capacity and related mechanical parameters. The test results include:(1)The basic law of load transfer in bored piles in diatomite stratum was obtained in the stress and deformation test of the pile shaft under static load test conditions;(2)The ultimate friction resistance of white,blue and black diatomite was obtained by calculating the axial force and skin friction of the pile shaft;(3)The relationship between the ultimate friction resistance and the basic bearing capacity of the three kinds of diatomite is nonlinear. Although blue diatomite has good compressive performance,its anti-friction performance does not improve greatly;(4)In engineering design,the pile tip shall not be set in the diatomite stratum as far as possible. The findings can provide a reference for determining the value of design parameters of pile foundations in diatomite stratum or similar projects.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2022-05-11
作者简介:康银庚(1986-),男,高级工程师。
基金项目:中国铁路设计集团有限公司科技开发应用研究类重点课题(721812)
更新日期/Last Update: 2023-08-30