[1]李雷,钟昌卫,徐伟宸,等.软土地段地基系数的比例系数试验研究[J].高速铁路技术,2022,13(06):57-62.[doi:10.12098/j.issn.1674-8247.2022.06.011
]
LI Lei,ZHONG Changwei,XU Weichen,et al.Experimental Study on Proportionality Coefficient of Foundation Coefficient in Soft Soil Section[J].HIGH SPEED RAILWAY TECHNOLOGY,2022,13(06):57-62.[doi:10.12098/j.issn.1674-8247.2022.06.011
]
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软土地段地基系数的比例系数试验研究()
《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]
- 卷:
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13卷
- 期数:
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2022年06期
- 页码:
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57-62
- 栏目:
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研究创新
- 出版日期:
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2022-12-20
文章信息/Info
- Title:
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Experimental Study on Proportionality Coefficient of Foundation Coefficient in Soft Soil Section
- 文章编号:
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1674—8247 (2022) 06—0057—06
- 作者:
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李雷1; 钟昌卫2; 徐伟宸3; 唐冕3; 宋旭明3
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1.中国铁路上海局集团有限公司, 南京210024;2.中铁第四勘察设计院集团有限公司,武汉430063;3.中南大学, 长沙410075
- Author(s):
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LI Lei1; ZHONG Changwei2; XU Weichen3; TANG Mian3; SONG Xuming3
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1.China Railway Shanghai Bureau Group Co. ,Ltd. ,Nanjing? 210024 ,China;2.China Railway Fourth Survey and Design Institute Group Co. ,Ltd. ,Wuhan? 430063 ,China;3.Central South University ,Changsha? 410075 ,China
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- 关键词:
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软土地区; 地基系数的比例系数; 水平静载; 试验研究
- Keywords:
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soft soil area; proportionality coefficient of foundation coefficient; horizontal static load; experimental study
- 分类号:
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TU471+.8
- DOI:
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10.12098/j.issn.1674-8247.2022.06.011
- 文献标志码:
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A
- 摘要:
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高速铁路对桥梁纵横向刚度要求严格,而地基系数的比例系数m是影响桥梁刚度的重要参数。为获得设计工点m的合理取值,本文通过现场单桩水平静载试验测试单桩水平承载力、位移和弯矩分布情况,得到深厚软土地段桩顶位移和桩身应变随水平力的变化规律,根据理论公式计算出m值并用公式进行拟合,从而给出了桥梁设计中单桩m值的建议值,结果表明:(1)桩基水平位移随水平力增加呈非线性变化,m值随桩基地面处位移呈幂函数衰减;(2)设计工点单桩m值为10263~11554kPa/m2,与规范取值(3000~5000kPa/m2)相比偏大。本文研究可为类似工程提供参考。
- Abstract:
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High-speed railways have strict requirements on the longitudinal and transverse stiffness of bridges,and the proportionality coefficient m of the foundation coefficient is an important parameter affecting the stiffness of bridges. In order to obtain a reasonable value of m at the design site,the horizontal bearing capacity,displacement,and bending moment distribution of a single pile are tested in the paper with an on-site single-pile horizontal static test,and the change rules of pile top displacement and pile body strain with horizontal force in deep and thick soft soil sections are obtained. The m value is calculated according to the theoretical formula and fitted with the formula,thus the recommended value of m for a single pile in bridge design. The results show that:(1)The horizontal displacement of the pile foundation changes nonlinearly with the increase of horizontal force,and the value of m attenuates with the displacement at the pile foundation surface as a power function.(2)The m value of a single pile at the design work site is 10 263~11 554 kPa/m2,which is larger than the specification value(3 000~5 000 kPa/m2). This study can provide
参考文献/References:
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[8] 张蕾,李风丽,张瑞,等. 一种地基土水平抗力系数的比例系数m的计算方法[J]. 自然灾害学报,2019,28(4): 202 - 208. ZHANG Lei,LI Fengli,ZHANG Rui,et al. A Method for Calculating Proportional Coefficient of Horizontal Resistance Coefficient of Foundation Soil[J]. Journal of Natural Disasters,2019,28(4):202 - 208.
[9] 郭海强,罗一农,邱永平,等. 地基比例系数m值对比研究[J].路基工程,2019(4): 1 - 6. GUO Haiqiang,LUO Yinong,QIU Yongping,et al. Contrastive Study on m Value of Proportional Coefficient of Foundation Coefficient[J]. Subgrade Engineering,2019(4): 1 - 6.
[10]?TB 10093 - 2017铁路桥涵地基和基础设计规范[S]. TB 10093 - 2017 Code for Design on Subsoil and Foundation of Railway Bridge and Culvert[S].
备注/Memo
- 备注/Memo:
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收稿日期:2021-10-08
作者简介:李雷(1985-),男,工程师。a reference for the design site and subsequent similar projects.
更新日期/Last Update:
2022-12-20