高铁特大桥施工组织设计与纤维高强混凝土柱的性能研究

发布时间：2018-11-14 10:04

【摘要】：随着我国经济的飞速发展,高速铁路显得越来越重要。考虑到我国地域辽阔,高速铁路沿线地质很难全部满足高铁铁路的需要,所以大部分都是以桥代路的形式。这样桥梁的建设就显得尤为重要,其中混凝土的性能对结构至关重要。施工组织设计是一项工程的主要依据,管理人员可以根据施工组织设计来合理安排各项资源的配置,以达到最佳的效果,另外,施工人员可以根据施工组织设计里配套的详细的施工方案进行施工,确保了工程的质量以及施工时的安全。利用施工组织设计,可以使企业的目标达到最优化。论文以高铁特大桥为实例,介绍了施工组织设计的工程概况和编制原则、工程特点、重难点分析及施工对策、总体施工部署原则和分项工程的施工进度和关键线路分析以及施工网络计划图、安全和质量的保证措施、主要工程施工方案,其中包括总体施工方案、路基施工方案、桥梁施工方案。再根据此工程实例,研究了聚丙烯纤维和玄武岩纤维下高强混凝土柱的单轴抗压强度和裂缝变化情况。试验研究采用了 24根150mm×150mm×500mm的C50高强混凝土柱,分为8组,每三个一组。一组普通对比柱;三组掺加聚丙烯纤维,聚丙烯纤维分别掺入水泥量 0.5%、1%、1.5%(2.40kg/m3、4.80kg/m3、7.20kg/m3);三组掺加玄武岩纤维,玄武岩纤维分别掺入水泥量0.5%、1%、1.5%(2.40kg/m3、4.80kg/m3、7.20kg/m3);一组掺加碳纤维,碳纤维掺入水泥量的0.5%(2.4kg/m3)。通过单轴抗压试验得出,1%的聚丙烯纤维能提高35.7%抗压强度,同时能有效的抑制裂缝的延伸;1.5%的玄武岩纤维能提高11.43%的抗压强度,同时能有效的抑制裂缝的延伸;从经济的角度来说,在以后的工程应用中可以用聚丙烯纤维和玄武岩纤维替代碳纤维。
[Abstract]:With the rapid development of economy in our country, high-speed railway becomes more and more important. Considering the vast territory of our country, the geology along the high-speed railway is difficult to meet the needs of the high-speed railway, so most of them are in the form of bridge instead of road. So the bridge construction is particularly important, in which the performance of concrete is very important to the structure. Construction organization design is the main basis of a project. According to the construction organization design, managers can reasonably arrange the allocation of various resources in order to achieve the best results. In addition, The constructors can carry out the construction according to the detailed construction plan in the construction organization design, which ensures the quality of the project and the safety of the construction. By using the construction organization design, the goal of the enterprise can be optimized. Taking the high-speed railway bridge as an example, the paper introduces the general situation of the construction organization design and its compiling principle, the engineering characteristics, the analysis of the heavy and difficult points and the construction countermeasures. General construction deployment principles, construction schedule and key line analysis of the sub-project, construction network plan, safety and quality assurance measures, main construction plans, including overall construction plan, roadbed construction plan, Bridge construction scheme. The uniaxial compressive strength and crack change of high strength concrete columns under polypropylene fiber and basalt fiber are studied. Twenty-four C50 high strength concrete columns with 150mm 脳 150mm 脳 500mm were divided into 8 groups, each of which was divided into three groups. One group of ordinary contrast column, three groups with polypropylene fiber, polypropylene fiber mixed with 0.5% cement content and 1.5% (2.40 kg / m ~ (3) (4.80 kg / m ~ (3) 7.20 kg / m ~ (3); Three groups were mixed with basalt fiber, the cement content of basalt fiber was 0.5% and 1.5% (2.40 kg / m ~ (3) / m ~ (3) 4.80 kg / m ~ (3) / 7.20 kg / m ~ 3); A group of carbon fibers mixed with 0.5% of the amount of cement (2.4kg/m3). The uniaxial compression test shows that 1% polypropylene fiber can increase the compressive strength by 35.7%, and can effectively restrain the crack extension. 1.5% basalt fiber can increase the compressive strength by 11.43%, and can effectively restrain the crack extension. From the economic point of view, polypropylene fiber and basalt fiber can be used to replace carbon fiber in the future engineering application.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.1;U444

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