Application And Research On Key Construction Technique Of Pits In Foundation Pit On Weifang Culture And Art Center

In recent years, large-scale underground space project is developing rapidly, the pits in foundation pit engineering of complicated underground structure is also increasing, the pits in foundation pit engineering has become one of the difficulties in the current urban construction. Engineering cases show that the lack of the pits in foundation pit repeatedly in-depth argument and neglect of the pits in foundation pit supporting structure and its environmental impact, would lead to affect engineering accident, delay the construction process, even in heavy losses. So,carry out the excavation engineering of the pits in foundation pit technology research is very necessary.This paper combination with weifang culture and art center pits in foundation pit engineering, compare to foundation pit excavation way of the control conditions for deformation of supporting structure design and foundation pit excavation way, to field monitoring of the whole process of construction of foundation pit, analysis summary inside and outside the pit deformation monitoring data, clear the influence factors of construction technology and deformation behavior.Mainly do the following:1)The overview of the current situation of the development of deep foundation pit engineering both at home and abroad at present, the uniqueness of the foundation pit engineering in view of the pit pit type, understanding of the pits in foundation pit engineering the urgency and importance of theoretical research and engineering practice application. And summed up the current commonly used foundation pit supporting type and applicable condition. According to all kinds of foundation pit supporting forms and characteristics of the objective analysis of the cultural and artistic center in the weifang theatre engineering characteristics and construction of foundation pit is difficult.2)Combined with weifang art center grand theatre surrounding the foundation pit engineering environment, soil, underground water level and other factors in the rational analysis of the supporting, draining water, has carried on the detailed design and calculation.3) The analysis of successful application of hierarchical segmentation earthwork excavation, reasonable planning and organization of the pit excavation pit type, such as earthwork sinotrans construction work.4) Through the analysis of the foundation pit monitoring data for different inside and outside the hole spacing, excavation depth, excavation method and the way of supporting the construction sequence, construction condition, or the influence of design parameters on the pits in foundation pit engineering. Pits in foundation pit supporting structure system is discussed and the changing rule of the stress and displacement of soil. Provides reference for similar project construction or experience.