[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()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
13卷
期数:
2022年06期
页码:
57-62
栏目:
研究创新
出版日期:
2022-12-20

文章信息/Info

Title:
Experimental Study on Proportionality Coefficient of Foundation Coefficient in Soft Soil Section
文章编号:
1674—8247 (2022) 06—0057—06
作者:
李雷1钟昌卫2徐伟宸3唐冕3宋旭明3
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):
LI Lei1ZHONG Changwei2XU Weichen3TANG Mian3SONG Xuming3
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
关键词:
软土地区 地基系数的比例系数 水平静载 试验研究
Keywords:
soft soil areaproportionality coefficient of foundation coefficienthorizontal static loadexperimental study
分类号:
TU471+.8
DOI:
10.12098/j.issn.1674-8247.2022.06.011
文献标志码:
A
摘要:
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:
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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备注/Memo

备注/Memo:
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