软土一维次固结特性试验研究

沈大庆; 于永堂; 侯晓亮

doi:10.3969/j.issn.1007-2993.2011.02.004

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软土一维次固结特性试验研究

doi: 10.3969/j.issn.1007-2993.2011.02.004

1. 机械工业勘察设计研究院, 陕西西安 710043;
2. 合肥工业大学资源与环境工程学院, 安徽合肥 230009

详细信息

作者简介:
沈大庆,1987年生,男,汉族,河南商丘人,助理工程师,主要研究方向:岩土工程监测与检测。Email:geohohaiyyt@yahoo.com.cn

中图分类号: TU411;TU447
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- 文章访问数: 45
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- 被引次数: 0
出版历程
- 收稿日期: 2011-02-17

Experimental Study on One-dimensional Characteristics of Soft Secondary Consolidation Clay

1. CHINA JIKAN Geotechnical Institute, China;
2. Institute of Resources and Environment Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

摘要

摘要: 基于南京河西地区原状和重塑软粘土的一系列一维次固结试验,探讨了预压荷载、加荷比、加荷方式对重塑软土次固结系数的影响以及原状土的次固结变形特征。试验结果表明:当荷载小于预压荷载时,预压能明显减小次固结系数,反之,预压对次固结系数的影响不明显;加荷比对次固结系数的影响明显,次固结系数随加荷比的增大而增大;分级加荷对应的次固结系数要大于分别加荷所对应的次固结系数;该地区原状土的蠕变属于衰减蠕变。
- 软土 /
- 主固结 /
- 次固结 /
- 次固结系数
Abstract: Based on a series of 1D secondary consolidation tests for natural and remolded soft clay samples at Hexi region in Nanjing, the pre-pressure, the load ratios and the loading methods on secondary consolidation properties of remolded samples and deformation characteristics of the natural samples have been researched. The results show that the pre-consolidation pressure can significantly reduce the secondary consolidation coefficient when the consolidation pressure is less than pre-pressure. Otherwise, the effect of pre-pressure on the secondary consolidation coefficient is not obvious. Increase of the load ratios is able to increase the secondary consolidation coefficient. The corresponding secondary consolidation coefficient of the step loading is greater than the separate loading. The creep deformation of natural samples in the region has the character of decay slowly.
- soft clay /
- primary consolidation /
- secondary consolidation coefficient /
- deformation