论文部分内容阅读
针对广东省博深高速公路潼湖隧道地下水及山泉水丰富的特点,将多孔水泥混凝土用作水泥路面的基层。在参考国内外研究成果的基础上,根据潼湖隧道水泥路面结构力学计算结果,提出了潼湖隧道多孔水泥混凝土基层的设计指标和标准。根据泰波理论、魏茅斯粒子干涉理论及国内外相关研究成果,给出了多孔水泥混凝土的粗集料级配范围,并通过正交试验优化了多孔水泥混凝土的粗集料级配。选取水泥用量、砂率和水灰比3个影响因素,每个因素设定取4个水平,进行了多孔水泥混凝土正交试验设计,采用极差分析法分析试验结果,得到了多孔水泥混凝土7d抗压强度和有效空隙率的回归方程,在此基础上确定了潼湖隧道多孔水泥混凝土基层的最佳配合比。依托潼湖隧道路面工程,总结了多孔水泥混凝土基层施工的关键技术。
In view of the characteristics of abundant groundwater and spring water of Tonghu Tunnel of Bo-Shen Expressway in Guangdong Province, porous cement concrete is used as the base of cement pavement. Based on the research results at home and abroad, according to the calculation results of the structural mechanics of cement pavement in Tonghu tunnel, the design indexes and standards of porous cement concrete in Tonghu tunnel are proposed. According to the theory of Tebow wave, the theory of particle interference of Weymouth and relevant research results at home and abroad, the range of coarse aggregate gradation of porous cement concrete is given, and the coarse aggregate gradation of porous concrete is optimized by orthogonal experiment. Select the cement dosage, sand rate and water-cement ratio of the three influencing factors, each factor set to take four levels, the orthogonal design of porous cement concrete, the analysis of test results using range analysis, obtained porous cement concrete 7d Compressive strength and effective porosity of the regression equation, on this basis to determine the optimal mix of the porous cement concrete base of Tonghu tunnel. Based on the Tonghu tunnel pavement project, the key technologies of porous cement concrete construction are summarized.