| At present, the development of city is fast. the problem of city space resources short gradually emerged, and the construction of subway can greatly ease the traffic pressure on the ground, and reduce the city ground space requirements. But owners often began planning subway when the city building has been high-rise buildings. Intersect in addition lines also caused the station more and more deep. The lag of underground space development has brought not only a lot of difficulties, but also the problem of engineering construction safety. In particular, it presents a serious challenge to the safety of subway station construction.This paper conducted in-depth theoretical research to meet subway construction in the near building deep foundation pit construction safety risk factors and evaluation. The full text is divided into six parts. The first chapter is the introduction, and describe the safety risk factors causing, the research background and the current situation of the theory, then put forward research method; the second chapter summarizes the recent building deep foundation pit construction characteristics and hazards; the third chapter, causing mechanism through the research of hazard identification and accidents, as well as field investigation, comprehensive design system security key influence factors in construction of deep foundation pit construction; the fourth chapter, using the analytic hierarchy process(AHP), constructs the comparison judgment, and the relative weight of each layer of the evaluation index system of factors is calculated. The fifth chapter studies the extension theory and the basic problem of matter element, establishes the evaluation index system, and make comprehensive evaluation on construction safety risk of the deep foundation pit near the building based on matter element; the sixth chapter is the conclusion and prospect, including the conclusions in this direction and further research. |
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