柔性路堤荷载作用下的地基承载力研究

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摘要研究目的：从变形控制出发, 以铁路工程为例, 研究柔性路堤荷载作用下的地基承载力问题。

研究结论：现行规范规定载荷试验中按沉降相对变形进行承载力特征值的取值偏于保守, 往往导致地基承载力不能充分利用。为充分利用地基承载力, 提出铁路路堤设计时, 应根据不同的地基允许沉降标准进行地基承载力特征值的取值, 可以在满足变形要求前提下, 在规范基础上将承载力特征值取值适当扩大, 以达到强度和变形的和谐统一。文中的结论可以为类似铁路工程提供参考。

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	魏永幸
	薛新华
	龚晓南

关键词 ：变形控制, 地基承载力, 柔性路堤, 载荷试验, 铁路路基

Abstract：Research purposes：Taking the railway engineering as an example, the study is done on the bearing capacity of foundation under flexible embankment load for controlling the foundation deformation.

Research conclusions：In the current code, the characteristic sampling value o f subgrade's bearing capacity is determined according to the relative deformation in plate load tes, tresulting in making no full use of the bearing capacity of soil foundation. In order to make full use of the foundations' bearing capacity, the characteristic sampling value of foundation's bearing capacity should be determined according to the various allowable settlement standards for the different projects in the design of railway engineering. Under the premise of meeting the deformation requirements, the characteristic sampling value of foundations' bearing capacity should be appropriately expanded in order to achieve the harmony and unity between the strength and deformation. The conclusions presented in this paper can be as reference to similar railway engineering.

Key words： deformation control bearing capacity of foundation flexible embankment load tes trail way subgrade

收稿日期: 2009-09-14

PACS:

U 213.1

作者简介: 魏永幸, 1964年出生, 男, 教授级高级工程师, 注册土木 (岩土 )工程师。

引用本文:

魏永幸；薛新华；龚晓南. 柔性路堤荷载作用下的地基承载力研究[J]. 铁道工程学报, 2010, 27(2): 22-26.
WEI Yong-xing, XUE Xin-hua, GONG Xiao-nan. Study on the Bearing Capacity of Foundation under Flexible Embankment Load. 铁道工程学报, 2010, 27(2): 22-26.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2010/V27/I2/22

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