強夯法聯(lián)合井點降水在處理軟土地基上的應(yīng)用與研究
[Abstract]:With the rapid increase of global population, the good soil resources available to people are becoming more and more scarce. With the progress of science and technology, reclamation and land construction and engineering construction on soft soil foundation have still become the current trend of development. In view of the particularity and complexity of soil quality engineering in soft soil foundation, the technology of foundation treatment has begun to be studied and innovated at a higher level and comprehensively. In recent years, many new technology, new methods and new theories have been used for reference and introduced. Among them, drainage consolidation method, vibration compaction method, replacement and mixing method, reinforcement method and so on. The dynamic compaction combined well point precipitation method mentioned in this paper has been widely used because of its short construction period and good economic benefits. In the previous dynamic compaction treatment, the excess pore water pressure in the soil increased for a short time due to the high energy dynamic compaction in the treatment of blown soft soil and silty soft soil. However, due to the lack of good drainage channel and the slow dissipation of superpore pressure, the phenomenon of "rubber soil" appears in the foundation. Through the engineering treatment example of blowing fill soft soil foundation in Qingdao Economic and technological Development Zone, the horizontal and vertical deformation of soil before and after foundation treatment, and the changing trend of super hole water pressure are counted in this paper. The technical parameters of construction technology and the time effect data of mechanical properties of soil. The reinforcement mechanism suitable for the engineering condition of soft soil foundation is analyzed, and it is determined that the new technique of combining dynamic compaction with well point dewatering can be used to accelerate the consolidation of soil and the dissipation of excess pore water pressure. Finally, the deformation and stress distribution of soft soil foundation under dynamic compaction are calculated by numerical simulation software FLAC-3D. Compared with the data of field test, the feasibility of treating soft soil foundation by dynamic compaction combined with well point precipitation method can be further proved.
【學位授予單位】:河北工程大學
【學位級別】:碩士
【學位授予年份】:2013
【分類號】:TU472.31;TU463
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