[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()
《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]
- 卷:
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14卷
- 期数:
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2023年04期
- 页码:
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30-34
- 栏目:
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- 出版日期:
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2023-08-30
文章信息/Info
- Title:
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A Study on Bearing Capacity of Bored Piles in Diatomite Stratum
- 文章编号:
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1674-8247(2023)04-0030-05
- 作者:
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康银庚
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中国铁路设计集团有限公司,天津 300308
- Author(s):
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KANG Yingeng
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China Railway Design Corporation ,Tianjin? 300308 ,China
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- 关键词:
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硅藻土地层; 静载荷试验; 极限摩阻力; 承载特性
- Keywords:
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diatomite stratum; static load test; ultimate friction resistance; bearing capacity
- 分类号:
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TU473.1+6
- DOI:
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10.12098/j.issn.1674-8247.2023.04.006
- 文献标志码:
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A
- 摘要:
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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:
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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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[2]KARAMAN S,KARAIPEKLI A,SAR? A,et al. Polyethylene Glycol (PEG)/Diatomite Composite as a Novel Form-stable Phase Change Material for Thermal Energy Storage[J]. Solar Energy Materials and Solar Cells,2011,95(7):1647-1653.
[3]赵其仁,李林蓓. 硅藻土开发应用及其进展[J]. 化工矿产地质, 2005,27(2):96-102. ZHAO Qiren,LI Linpei. The Application and Evolution of Diatomite [J]. Geology of Chemical Minerals,2005,27(2):96-102.
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[5]李懿,马秋柱,吴乔. 硅藻土地层中灌注桩侧摩阻力的确定[J].中国港湾建设,2018,38(6):26-29. LI Yi,MA Qiuzhu,WU Qiao. Determination of Shaft Resistance for Cast-in-situ Pile in Diatomite[J]. China Harbour Engineering, 2018,38(6):26-29.
[6]高华喜,殷坤龙,周春梅. 硅藻土滑坡稳定性分析及其时间预报[J]. 西北大学学报(自然科学版),2007,37(1):127-130. GAO Huaxi,YIN Kunlong,ZHOU Chunmei. Diatomite Landslides Stability Analysis and Time Forecast[J]. Journal of Northwest University (Natural Science Edition),2007,37(1):127-130.
[7]吴乔,赵瑞东. 基于欧标的硅藻土地层中桩基负摩擦计算[J].水运工程,2019(12):133-139. WU Qiao,ZHAO Ruidong. Negative Friction Calculation of Pile Foundation in Diatomaceous Soil Based on Eurocode[J]. Port &Waterway Engineering,2019(12):133-139.
[8]康银庚,高磊,罗易,等. 硅藻土地区桥梁灌注桩成孔测试研究[J]. 防灾减灾工程学报,2021,41(2):335-342. KANG Yingeng,GAO Lei,LUO Yi,et al. Study on Borehole Test of Bridge Cast-in-place Piles in Diatomite Area[J]. Journal of Disaster Prevention and Mitigation Engineering,2021,41(2):335-342.
[9]朴春德,施斌,魏广庆,等. 分布式光纤传感技术在钻孔灌注桩检测中的应用[J]. 岩土工程学报,2008,30(7):976-981. PIAO Chunde,SHI Bin,WEI Guangqing,et al. Application of Distributed Fiber Optic Sensing Techniques in Bored Pile Detection [J]. Chinese Journal of Geotechnical Engineering,2008,30(7):976-981.
备注/Memo
- 备注/Memo:
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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