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废旧轮胎的治理是一个世界性的难题,而将废旧轮胎应用于岩土工程加固中则为其污染治理提供了一个行之有效的手段。为了进一步研究废旧轮胎对土体的加固机制并应用到实际工程中,主要选取了全风化花岗岩砂颗粒和加工后的废旧轮胎(包括颗粒型和长条型)的混合体作为研究对象,通过一系列不同竖向压力下的一维压缩试验,详细研究不同橡胶含量配比、不同形态下的橡胶-砂混合体的受压力学特性,并创新性地探讨了橡胶颗粒对砂颗粒在压缩过程中破碎行为的影响。试验结果表明,所有橡胶-砂混合体在较高压力作用下都能收敛到一条直线,即存在唯一的标准压缩线;随着橡胶含量增加到大于20%,混合物的压缩和卸载回弹量均明显增加,而这种特性不受轮胎颗粒形态的影响。此外,轮胎橡胶含量配比越高,砂颗粒的破碎程度越小,同时,当其中砂颗粒尺寸越小时,整体破碎越少。
The management of discarded tires is a worldwide problem, and the application of discarded tires to geotechnical reinforcement provides an effective means of pollution control. In order to further study the reinforcement mechanism of waste tire on soil and apply it to the actual project, the mixture of fully-weathered granite sand particles and processed waste tires (including particle type and long type) is selected as the research object. Series of one-dimensional compression tests under different vertical pressures were carried out to study in detail the compressive mechanical properties of rubber-sand mixtures with different rubber contents and different morphologies. The effects of rubber particles on the compression of sand particles Impact of crushing behavior. The experimental results show that all the rubber-sand hybrids converge to a straight line under the higher pressure, that is, the only standard compression line exists. As the rubber content increases to more than 20%, both the compression and unloading rebound of the mixture Significantly increased, and this feature is not affected by the morphology of the tire particles. In addition, the higher tire rubber content ratio, the smaller the degree of crushing sand particles, at the same time, when the sand particle size smaller, the overall fragmentation less.