粗粒含量对红砂岩粗粒土压实变形特征的影响

发布时间：2018-02-08 09:19

本文关键词： 压实变形特征静力压实试验红砂岩粗粒土粗粒含量　出处：《公路》2017年01期 　论文类型：期刊论文

【摘要】：为研究粗粒含量对红砂岩土静力压实变形特征的影响,利用自制装置在电子万能试验机上进行静力压实试验,得到6种不同粗粒含量红砂岩土静力压实试验的压力-位移关系,分析粗粒含量对静力压实变形特征的影响。结果表明:不同粗粒含量红砂岩土在静力压实过程中的应力与应变符合指数关系;在相同的应力作用下,当粗粒含量为60%时,土体产生的应变最大;不同粗粒含量红砂岩土的压缩模量与对应应力范围终值之间呈线性关系,在相同应力范围内,当粗粒含量为60%时土体的压缩模量最小,压缩性最高;红砂岩粗粒土的静力压实过程可分为3个阶段,分别为压密阶段、破碎阶段和稳定阶段;在静力压实过程中,应变增长存在拐点;应变拐点的出现,标志着红砂岩粗粒土静力压实过程变形阶段的转变。
[Abstract]:In order to study the influence of coarse grain content on the static compaction deformation characteristics of red sandstone soil, a static compaction test was carried out on an electronic universal testing machine with self-made apparatus, and the pressure-displacement relationship of six different coarse grained red sandstone soil static compaction tests was obtained. The effect of coarse grain content on the deformation characteristics of static compaction is analyzed. The results show that the stress and strain of red sandstone soil with different coarse grain content conform to the exponential relationship during static compaction, and when the coarse grain content is 60, under the same stress, The compressive modulus of red sandstone soil with different coarse grain content is linear with the end value of corresponding stress range. In the same stress range, when the coarse grain content is 60, the compression modulus of soil is the smallest and the compressibility is the highest. The static compaction process of red sandstone coarse grained soil can be divided into three stages, namely, compaction stage, crushing stage and stable stage, in the static compaction process, the strain growth has inflection point, the strain inflection point appears, It marks the transformation of deformation stage during static compaction of coarse grained red sandstone soil.
【作者单位】：江西理工大学建筑与测绘工程学院;江西理工大学资源与环境工程学院;
【基金】：国家自然科学基金项目,项目编号51204076;51304084 江西省自然科学基金项目,项目编号20122BAB206035 江西省教育厅科技项目,项目编号GJJ13408
【分类号】：U416.1

【相似文献】