基于废油综合利用的微尘灰土在道路工程中的适用性试验研究

发布时间：2018-11-20 20:08

【摘要】：我国目前土质道路与道路施工现场扬灰现象严重,而生活废油回收再利用问题也是当下热门话题。基于目前已经应用的煤炭抑灰剂配方来讨论其在道路灰土应用的效果与力学性质变化。得出结论为:餐厨废油微粒的存在对于石灰土抑灰效果明显而对物理性质变化不大,对力学性质有些许增益作用。本文首先设计试验方法,确定试验灰土的配比与基本物理参数;其次从理论入手考虑一维扩散方程进行理论分析,构建合理的风道模型与试验参数设定并进行试验;然后对灰土进行力学试验并与原状灰土力学性质进行对比分析;最后进行了灰土稳定性试验研究。本文的主要工作和具体研究成果如下:1、确定试验土体基本参数并确定餐厨废油与石灰土配合比。通过击实试验确定油微粒对于石灰土的最大干密度与其对应的最佳含水率影响甚微。通过液塑限联合测定确定油微粒使土粒在低含水率条件下趋于软化,高含水率下不易液化。2、建立风洞并且对石灰微粒进行试验,得出油微粒存在使得粒子飘散得到明显的抑制。3、对于石灰土进行无侧限抗压强度试验与三轴压缩试验,得出结果为油微粒使得土体抗压强度,内摩擦角φ与内聚力c都提高。4、通过对土体进行渗透试验,固结试验和无荷载膨胀试验,得出油微粒使得水分难以进入土体,增强土体稳定性与耐久性。
[Abstract]:At present, the soil-quality road and road construction site in our country is serious, and the problem of recovery and reuse of domestic waste oil is also a hot topic at present. Based on the formula of coal ash suppressant used at present, the effect and mechanical property change of the application of coal ash inhibitor in road lime soil are discussed. The conclusions are as follows: the existence of waste oil particles has obvious inhibition effect on lime soil, little change on physical properties, and a little gain on mechanical properties. In this paper, the test method is first designed to determine the ratio and basic physical parameters of the test lime soil, and then the theoretical analysis is carried out by considering the one-dimensional diffusion equation, and a reasonable wind duct model and test parameters are set up and tested. Then the mechanical properties of lime-soil were tested and compared with those of undisturbed gray-soil. Finally, the stability of lime-soil was studied. The main work and specific research results are as follows: 1. Determine the basic parameters of the test soil and determine the proportion of cooking waste oil and lime soil. The results of compaction test show that oil particles have little effect on the maximum dry density of lime soil and its corresponding optimum moisture content. Through the determination of liquid plastic limit, it is determined that oil particles tend to soften soil particles under low water content, but not easy to liquefy under high water content. 2. Wind tunnel is established and lime particles are tested. It is concluded that the existence of oil particles can inhibit the dispersion of particles obviously. 3. The unconfined compressive strength test and triaxial compression test of lime soil are carried out, and the results show that the oil particles make the compressive strength of soil. The internal friction angle 蠁 and cohesion c are both increased. 4. Through the penetration test, consolidation test and no load expansion test, it is concluded that the oil particles make it difficult for water to enter the soil, and enhance the stability and durability of the soil.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U414

【相似文献】