Deformation characteristics of broken stone and effect evaluation of composite foundation with stone compaction column

ZHU Zhi-duo; LIU Yi-huai

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Deformation characteristics of broken stone and effect evaluation of composite foundation with stone compaction column

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- Deformation characteristics of broken stone and effect evaluation of composite foundation with stone compaction column
- Vol. 27, Issue 7期　刊出日, (2006)
- 作者机构：
  
  1. 东南大学交通学院,南京,210096
  2. 江苏省高速公路指挥部,南京,210004
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU472
- Online First：19 November 2013，
  
  Published：2006
- 稿件说明：
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ZHU Zhi-duo, LIU Yi-huai. Deformation characteristics of broken stone and effect evaluation of composite foundation with stone compaction column[J]. 2006, 27(7期　刊出日).
DOI：

ZHU Zhi-duo, LIU Yi-huai. Deformation characteristics of broken stone and effect evaluation of composite foundation with stone compaction column[J]. 2006, 27(7期　刊出日). DOI：

摘要

挤密碎石桩的材料是粒径较大的碎石，粒间粘结很小，其力学特性和其密度与侧压力有关，以往研究多作为弹性材料看待。利用大型三轴试验研究了碎石的变形特点，并根据试验结果总结了碎石的变形规律。在工程上常遇到的应变范围内，碎石三轴剪切试验的应力-应变关系可用双曲线拟合，体变曲线则接近于抛物线；单向压缩试验的轴向应力-应变符合幂函数曲线。徐－宿高速公路挤密碎石桩地基处理现场试验结果表明，经过碎石桩处理后的液化地基的液化势得到消除，该试验研究工作对类似工程有参考价值。

Abstract

Stone column is composed of broken stones

among which the interconnections are very small. Thus the mechanical characteristics of broken stones depends on their densites and lateral pressure mainly. The deformation characteristics of broken stones are studied by the large scale triaxial shear tests and axial compression tests

the laws about broken stones are drawn according to the test results as follows: the relationship between the deviator stress and axial strain is close to a hyperbola and the relationship between the volume strain and the axial strain is similar to a parabola for the triaxial shear tests; the relationship between the axial stress and the axial strain are near to a power function curve for the axial compression tests. The test for the composite foundation of stone columns of Xu-Su Expressway is described in detail. The results show that the liquefaction potential has been eradicated when the stone columns are used to treat the soil foundation of this area. The tests and results have a referential value to the similar engineering problems.

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ZHU Zhi-duo1

LIU Yi-huai2

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LI Tong-lu

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Related Institution

School of Geological Engineering and Surveying, Chang’an University

Key Laboratory for Geo-hazards in Loess Area of Ministry of Land and Resources, Xi’an Center of Geological Survey, China Geological Survey

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Huaiyin Institute of Technology, Huaian

Research Institute of Geotechnical Engineering, Hohai University

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