水工沥青混凝土配合比的优化及施工质量控制研究

发布时间：2018-05-14 12:15

本文选题：沥青混凝土 + 配合比优化　；参考：《西安理工大学》2017年硕士论文

【摘要】：进入21世纪以来,随着社会生产力和经济的不断提高,基础设施的建设不断加快,这就更加要求施工技术以及材料在项目的建设中起到更加重要的作用。沥青混凝土在水利水电工程中应用非常广泛,其具有非常好的防渗功能,经常用在土石坝、碾压混凝土坝,抽水蓄能电站上池、渠道等领域中。本文以沥青混凝土配合比优化(实验室内劈裂试验)到通过模拟现场施工条件进行小梁弯曲试验来控制沥青混凝土心墙施工质量为主线进行研究。在水利工程中,沥青混凝土的配合比优化是一个值得深入研究的课题。本文以重庆市某水库的沥青混凝土劈裂试验数据为依托,通过分析劈裂强度、劈裂位移、孔隙率三个指标,运用效用函数的理论即通过综合考虑劈裂强度、劈裂位移、孔隙率对施工本身的效用,通过熵值法理论依据客观的赋予三个指标的权重,最终选择出一组综合性能最优的配合比为级配指数取0.39、油石比取6.9%、填料用量取14%。本文分析了影响施工项目质量的主要因素,并研究了沥青混凝土心墙施工过程中质量控制的方法与措施。在施工过程中(在其他施工条件不变的情况下)以沥青混凝土施工配合比的角度研究沥青混凝土心墙施工质量的控制。由于沥青混凝土配合比与沥青混凝土弯曲性能之间存在复杂的非线性关系,所以在沥青混凝土弯曲性能与配合比之间建立多元非线性模型,根据泰勒(Taylor)级数公式,利用多项式予以逼近。本文根据11组沥青混凝土的弯曲强度、弯曲应变、孔隙率分别与油石比、级配指数、填料用量运用MATLAB工具建立三个非线性预测方程,在施工过程中(其他施工条件不变),利用抽提试验得到施工配合比,根据沥青混凝土施工配合比的偏差可以得到沥青混凝土心墙的弯曲性能,对照设计规范要求鉴定出沥青混凝土心墙是否满足设计要求,以达到在施工过程中控制质量的目的。
[Abstract]:Since the beginning of the 21st century, with the continuous improvement of social productivity and economy, the construction of infrastructure has been accelerated, which requires construction technology and materials to play a more important role in the construction of the project. Asphalt concrete is widely used in water conservancy and hydropower projects. It has very good anti-seepage function. It is often used in earth-rock dam, roller compacted concrete dam, pumped-storage power station upper pool, canal and other fields. This paper focuses on the optimization of asphalt concrete mixture ratio (in-laboratory splitting test) to control the construction quality of asphalt concrete core wall by simulating the construction conditions of trabecular bending test. In hydraulic engineering, the mix ratio optimization of asphalt concrete is a subject worthy of further study. Based on the experimental data of asphalt concrete splitting in a certain reservoir in Chongqing, this paper analyzes the three indexes of splitting strength, splitting displacement and porosity, and applies the theory of utility function to consider the splitting strength and displacement comprehensively. The utility of porosity to construction itself, according to the theory of entropy value method, the weight of three indexes is given objectively. Finally, a group of optimum mix ratio of comprehensive performance is chosen as gradation index 0.39, oil stone ratio 6.9g and filler dosage 14g. In this paper, the main factors affecting the quality of construction project are analyzed, and the methods and measures of quality control in the construction of asphalt concrete core wall are studied. The construction quality control of asphalt concrete core wall is studied from the point of view of asphalt concrete construction mix ratio in the construction process (under the condition of other construction conditions unchanged). Because there is a complex nonlinear relationship between asphalt concrete mix ratio and asphalt concrete bending performance, a multivariate nonlinear model is established between asphalt concrete bending performance and mix ratio, according to Taylor Taylor series formula, Approximation is made by means of polynomials. According to the bending strength, flexural strain and porosity of 11 groups of asphalt concrete, three nonlinear prediction equations are established by using MATLAB tools, respectively, according to the ratio of asphalt to stone, gradation index and filler content. In the course of construction (other construction conditions remain unchanged, the construction mix ratio is obtained by extraction test, and the bending performance of asphalt concrete core wall can be obtained according to the deviation of asphalt concrete construction mix ratio. According to the requirements of the design code, it is determined whether the asphalt concrete core wall meets the design requirements in order to control the quality in the construction process.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV544;TV523

【参考文献】