Experimental Study on Mechanical Properties of Soil mixed with Deformable Particles

掺有变形颗粒土力学性能试验研究

基本信息

批准号：
15580216
负责人：
KIMATA Takashi
金额：
$ 1.15万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15580216/
关键词：
Deformable Particles Mixed Soil Consolidation Test X-ray CT Triaxial Compression Test Compressive Properties Creep Properties Physical Properties of Soil 透水性保水性画像解析

项目摘要

In this study, mechanical properties, such as deformability, of deformable particle mixed soil using expanded plastic wastes were investigated. At first, one-dimensional compression mechanism of soil which containing deformable particles in the soil skeleton was examined using the results of one-dimensional consolidation tests. As a result, two extra types of compression structural configurations of the components in addition to the ordinary volumetric compression caused by the rearrengement of a rigid particle skeleton as in the case of the deformable particle mixed soil. One of them was the volumetric compression of the deformable particle itself and the other was a further pore phase reduction caused by the deformation of the deformable particles. Then, microscopic observation using X-ray CT was carried out to evaluate the volumetric compression of deformable particles. Consequently, it was quantitatively confirmed that above-mentioned classification of extra components was valid. And in parallel, triaxial compression tests using double cell apparatus were conducted to attempt the individual measurement of volumetric compressive strain into the compression of deformable particle itself and the amount of pore space reduction. However, it was impossible to estimate these two extra types of components individually, because of the existence of the water getting into the pore spaces of expanded plastic particle's surfaces. Therefore, the latter term of this study, creep property and permeability & water retentivity of soils were investigated, for the purpose of the actual application of this expanded plastic wastes into the lightweight geomaterials. As a result, the amount of settlement caused by creep was in proportion to the mixing ratio of the plastic wastes. And as for the physical properties, it was clarified that the permeability and water retentivity were improved in addition to lightening effect, in case of mixing this plastic wastes with soil.

在这项研究中，研究了使用膨胀塑料废料制成的可变形颗粒混合土的变形能力等力学性能。首先，利用一维固结试验的结果，研究了土骨架中含有变形颗粒的土的一维压缩机制。因此，除了像可变形颗粒混合土那样由刚性颗粒骨架重新排列引起的普通体积压缩之外，还产生了两种额外类型的组件压缩结构配置。其中之一是可变形颗粒本身的体积压缩，另一个是可变形颗粒变形引起的进一步孔相减少。然后，使用X射线CT进行显微观察，以评估可变形颗粒的体积压缩。因此，定量地证实了上述额外成分的分类是有效的。同时，使用双室装置进行三轴压缩试验，尝试单独测量体积压缩应变到可变形颗粒本身的压缩和孔隙空间减少量。然而，由于水进入膨胀塑料颗粒表面的孔隙空间，因此不可能单独估计这两种额外类型的成分。因此，本研究的后期，对土壤的蠕变特性、渗透性和保水性进行了研究，以期将这种膨胀塑料废料实际应用于轻质土工材料。结果，蠕变引起的沉降量与塑料废物的混合比成正比。至于物理性质，表明如果将这种塑料废物与土壤混合，除了轻质效果外，渗透性和保水性也得到改善。