废轮胎颗粒与黄土混合土压缩特性研究  

The compressibility of granulated rubber and loess mixtures

作　　者：李朝晖[1,2] 张虎元[1] 

机构地区：[1]兰州大学西部灾害与环境力学教育部重点实验室,兰州730000 [2]甘肃省建筑设计研究院,兰州730030

出　　处：《工程勘察》2012年第3期12-17,共6页Geotechnical Investigation & Surveying

基　　金：甘肃省交通厅资助项目(甘交工(科研)2009第001号)

摘　　要：通过一维压缩试验研究了掺量为0%～50%的废轮胎颗粒与黄土混合土的压缩特性,目的是研究该混合土作为轻质回填材料的可行性。试验结果表明,混合土压缩特性介于纯压实黄土与纯废轮胎颗粒之间,总体上随掺量增加压缩系数增大、压缩模量减小、可恢复应变增加。低应力条件下废轮胎掺量约30%的混合土应变较小,随掺量增加混合土压缩模量减小。混合土内部颗粒接触结构及颗粒刚度特性是压缩特性变化的主要原因。研究认为,废轮胎颗粒与黄土混合土的压缩模量随掺量变化的特性及其较大的可恢复变形性可用于与变形有关的岩土工程中,比如涵顶减荷、动力荷载应力缓冲等,同时也为处理废轮胎提供了新的岩土工程途径。One-dimensional confined compression tests have been used to investigate the compressibility of granulated rubber and loess mixtures.The purpose is to find the probability of their usage as a light weight fill material.The results indicate that the compression properties of mixtures are between pure compact loess and pure granulated rubber.The modulus of compressibility reduces with increasing granulated rubber content,and the coefficient of compressibility and elastic strain increase with increasing granulated rubber content.One of the main reasons in changing of compressibility of mixture is the interpartical contact structure.The elastic of granulated rubber causes an increase of low modulus of compressibility.It is considered that the property of modulus of mixture varying with the content can be used in geoengineering applications to deal with displacement such as reducing load of cave and dynamic stress release.It is also a new manner in geotechnical of disposal scrap tires.

关 键 词：废轮颗粒黄土混合土 掺量 孔隙比 压缩特性 压缩模量 

分 类 号：TU599[建筑科学—建筑技术科学]