论文部分内容阅读
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。
The compression characteristics of the mixture of waste tire particles and loess mixed with 0% ~ 50% were studied by one-dimensional compression test in order to study the feasibility of this mixed soil as a light backfill material. The experimental results show that the compressive characteristics of the mixed soil are between pure compacted loess and pure waste tire particles. Generally, the compressibility increases, the compressive modulus decreases and the recoverable strain increases. Under low stress condition, the strain of mixed soil with the content of waste tire about 30% is smaller, and the compressive modulus of mixed soil decreases with the increase of the content of mixed tire. The internal particle contact structure and particle stiffness characteristics of mixed soil are the main reasons for the change of compression characteristics. The study shows that the compressive modulus of the mixture of waste tire particles and loess can be used in deformation-related geotechnical engineering, such as the deformation of culvert, dynamic load and stress buffer And so on, but also for the disposal of waste tires provides a new geotechnical approach.