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目前常规地下连续墙的技术运用越来越成熟,但仍存在较多问题。而预制预应力地连墙具有常规地连墙所没有的很多优势,且符合未来绿色施工的发展方向,具有重大的研究意义。选取上海地区典型地质,对常规地连墙、先张法预制预应力地连墙及后张法预制预应力地连墙进行了有限元模拟分析,在围护墙体自身变形、受力及周边环境保护等方面进行了系统的比较分析。结果表明后张法对控制变形有着较好的效果,且在相同地连墙自身变形及周边环境影响下,后张法预应力地下连续墙的墙身厚度可以更薄,支撑数量可以更少,可有效减小混凝土用量,这都有利于将来预制预应力地连墙的推广运用。
At present, the technical application of conventional underground continuous walls is more and more mature, but there are still many problems. However, the prefabricated prestressed continuous wall has many advantages that the conventional continuous wall does not have and is in line with the development direction of the green construction in the future, which is of great research significance. The typical geology in Shanghai area is selected to conduct the finite element simulation analysis of the prestressed prestressed continuous wall prestressed with pretensioned method and the prestressed prestressed continuous wall of post tensioned method. Environmental protection and other aspects of a systematic comparative analysis. The results show that the post-tensioning method has a good effect on deformation control. With the same deformation of the continuous wall and the surrounding environment, the wall thickness of the post-tensioned prefabricated diaphragm wall can be thinner and the supporting quantity can be less, Can effectively reduce the amount of concrete, which are conducive to the future precast prestressed wall to promote the use of.