| 膨胀土及其改良土静动力特性对比分析 |
| |
| 引用本文： | 雷胜友,惠会清. 膨胀土及其改良土静动力特性对比分析[J]. 岩石力学与工程学报, 2004, 23(17): 3003-3008 |
| |
| 作者姓名： | 雷胜友 惠会清 |
| |
| 作者单位： | 1. 长安大学公路学院,西安,710064
2. 长安大学基础部化学实验室,西安,710064 |
| |
| 基金项目： | 陕西省自然科学基金(97C22,2001C01)，地质灾害防治与工程地质环境保护国家专业实验室开放基金(99007)，西安公路交通大学青年科技发展项目 |
| |
| 摘 要： | 研究了膨胀土及其改良土的基本物理性质，进行了膨胀土的静动三轴试验。通过资料对比，发现膨胀土的静应力-应变曲线呈硬化型，改良土的呈软化型，改良土的静强度和粘聚力比膨胀土的大：发现两类土的动应力都存在一个门槛值，由此将土体的变形分为稳定型及破坏型，得到了累积塑性变形与循环荷载次数间的关系表达式：还研究了两类土的骨干线、动弹性模量-动应变曲线的变化规律，未发现动荷载频率对土体变形有显著影响。
|
| 关 键 词： | 土力学 膨胀土及其改良土 静动力特性 铁路基床 |
| 文章编号： | 1000-6915(2004)17-3003-06 |
| 收稿时间： | 2003-02-13 |
| 修稿时间： | 2003-05-01 |
DYNAMOSTATIC ANALYSIS OF PROPERTIES OF EXPANSIVE SOIL AND IMPROVED SOIL |
| |
| Lei Shengyou,Hui Huiqing. DYNAMOSTATIC ANALYSIS OF PROPERTIES OF EXPANSIVE SOIL AND IMPROVED SOIL[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(17): 3003-3008 |
| |
| Authors: | Lei Shengyou Hui Huiqing |
| |
| Affiliation: | Lei Shengyou~1,Hui Huiqing~2 |
| |
| Abstract: | The physical properties of expansive soil and improved one are researched, and the dynamostatic triaxial tests are made on the two kind of soils. Compared with the other material, it is found that the stress-strain curve of expansive soil behaves as strain hardening, while that of improved expansive soil behaves as strain softening. The static strength and cohesion of improved expansive soil are bigger than that of expansive soil. There is a threshold of dynamical stress which divides the deformation of soil into steady-state deformation and destructive-state deformation for the two kinds of soils. The experimental formula between the cumulative plastic strain and the number of cycles of dynamic load is set up, and the dynamical stress-strain curve and dynamical elastic modulus-elastic strain curve for two kinds of soil are also studied. According to the testing results, it is not found for the frequency of dynamical load to affect the deformation of soils obviously. |
| |
| Keywords: | soil mechanics expansive soil and improved soil dynamostatic properties railway sub-grade |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩石力学与工程学报》浏览原始摘要信息 |
|
点击此处可从《岩石力学与工程学报》下载全文 |
