筏板基礎(chǔ)大體積混凝土施工技術(shù)研究
[Abstract]:In recent years, with the continuous expansion of the scale of engineering construction in China, high-rise buildings have played an extremely important role in the construction industry. Raft foundation is a common foundation form in high-rise buildings. Its slab thickness is large and it belongs to mass concrete structure. Because the foundation is very important in the high-rise building and the foundation is deepened and extended, the research on the mass concrete construction technology of raft foundation has been paid more and more attention. Crack control is the key research direction of mass concrete in raft foundation. The following aspects are studied in this paper: 1. From the point of view of construction, the characteristics, causes and control measures of mass concrete cracks in raft foundation are analyzed. It is pointed out that the foundation cracks are mainly surface cracks, mainly due to the large deformation of temperature and shrinkage during construction. In this paper, measures are taken to prevent cracks from reducing hydration heat of concrete and improving crack resistance of foundation concrete. 2. Temperature crack calculation of mass concrete in raft foundation. According to the engineering cases, the temperature cracks are calculated systematically, and the maintenance measures are determined according to the calculation results to guide the construction of mass concrete. 3. The construction organization, scheme and construction technology of mass concrete of raft foundation are studied. The measures of temperature control of concrete, pouring of mass concrete, maintenance measures and temperature monitoring are discussed. Emphasis is placed on the construction of the post-pouring belt, the secondary spattering and the temperature monitoring technology. In the engineering case, the corresponding construction measures are selected according to the site conditions, so that the construction can be carried out quickly and effectively. 4. Mass concrete construction quality control of raft foundation. This paper analyzes on the main factors affecting the construction quality, takes the prevention and treatment measures for the common defects of the construction quality, and summarizes the main aspects of improving the construction quality of the mass concrete.
【學(xué)位授予單位】:鄭州大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2013
【分類號】:TU755
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