SG-1型土壤固化剂稳定碎石土配合比设计及路用性能研究

发布时间：2018-01-25 21:14

本文关键词： 土壤固化剂碎石土固化机理级配范围配合比设计路用性能　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：公路建设的飞速发展，带来了日益严重的原材料短缺问题。石料是我国路面基层的常用原材料，且所占比例较大。随着新建、改建、扩建公路项目的开工，优质石料的供应短缺问题逐渐显现出来。石料供应不足就会引起价格上涨，进而导致石料的大量开采，这不仅会对山体造成破坏，还会对生态环境造成威胁。为建立资源节约型和环境友好型社会，道路研究者逐渐将视线转移到土壤固化剂稳定类基层。土壤固化剂是一种新型环保、节能的材料，能够有效地改善土壤的物理—力学性质，使之具有较好的力学及路用性能。本文依托陕西省神木县重点通村公路项目，进行SG-1型土壤固化剂稳定碎石土在路面基层中的应用研究。本文首先检测了原材料性质，并分析了各类土壤固化剂的固化机理；通过研究级配粗细和无侧限抗压强度的关系，并推荐了适合SG-1型土壤固化剂稳定碎石土的级配范围；利用正交试验，对影响SG-1型土壤固化剂稳定碎石土基层强度的因素进行排序；通过室内试验，研究了SG-1型土壤固化剂稳定碎石土基层材料的力学性能、干缩性、水稳定性、抗冻性以及抗冲刷性等，并与水泥稳定碎石土、水泥稳定碎石进行对比；通过材料费用计算，分析其经济可行性。龄期为180d时，SG-1型土壤固化剂稳定碎石土（7%）力学性能与水泥稳定碎石土（7%）较为接近；但本文涉及的其它路用性能均优于水泥稳定碎石土（7%）。在抗冲刷性能、耐磨性方面，高剂量（18%）土壤固化剂稳定碎石土优于水泥稳定碎石（5%）；而在水稳定性、抗冻性方面，接近于水泥稳定碎石（5%）；其干缩性优于水泥稳定碎石土（7%），次于水泥稳定碎石（5%）。通过试验发现，SG-1型土壤固化剂稳定碎石土基层力学性能和路用性能良好，经济上可行，并且能够减少石料使用，保护环境。高剂量（18%）土壤固化剂稳定碎石土具有优越的力学性能，，为解决不断增加的轴载问题开辟了道路。本文的研究成果对SG-1型土壤固化剂稳定碎石土基层设计和施工具有重要的指导价值。
[Abstract]:With the rapid development of highway construction, the shortage of raw materials is becoming more and more serious. Stone is the common raw material of pavement base in our country, and it accounts for a large proportion. The shortage of high quality stone is becoming more and more obvious. The shortage of stone will cause the price to rise, and then lead to the massive mining of stone, which will not only destroy the mountain. In order to establish a resource-conserving and environment-friendly society, road researchers have gradually shifted their attention to the soil curing agent and stabilizing the basic level. Soil curing agent is a new kind of environmental protection and energy saving material, which can effectively improve the physical and mechanical properties of soil. So that it has better mechanical and road performance. This paper relies on the Shenmu County Shaanxi Province Tongcun Road Project. In this paper, the properties of raw materials are tested, and the curing mechanism of various soil curing agents is analyzed. The relationship between gradation thickness and unconfined compressive strength was studied, and the gradation range suitable for SG-1 type soil curing agent stabilized macadam soil was recommended. By orthogonal test, the factors affecting the strength of SG-1 stabilized gravel soil base were sorted. Through laboratory tests, the mechanical properties, dry shrinkage, water stability, frost resistance and scour resistance of SG-1 type soil curing agent stabilized macadam base material were studied and compared with cement stabilized macadam soil. The cement stabilized macadam is compared; Through the material cost calculation, analyzes its economic feasibility. When the age is 180 days, the mechanical properties of SG-1 stabilized macadam are close to that of cement stabilized macadam. However, the other road performance mentioned in this paper is superior to that of cement stabilized macadam soil in terms of scour resistance and wear resistance. Soil curing agent stabilized macadam is better than cement stabilized macadam. In the aspect of water stability and frost resistance, it is close to cement stabilized macadam. Its dry shrinkage is better than that of cement stabilized macadam, and it is inferior to cement stabilized macadam. It is found that the mechanical properties and road performance of the base course of stabilized gravel soil with SG-1 soil curing agent are good, economical and feasible, and the use of stone can be reduced. To protect the environment. High dose ~ (18) soil stabilizer stabilized macadam soil has superior mechanical properties. The research results of this paper have important guiding value for the design and construction of SG-1 stabilized macadam soil base.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414

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