Optimization Design And Analysis Of The Foundation Construction Scheme Of The Yao Zhuang Bridge

Foundation Pit is the excavation of an underground space below the surface and a coordinated support system. Bracing of foundation pit is to ensure that excavation and foundation construction for the smooth and safe environment Foundation Pit and used the pit retaining wall reinforcement and protection.The main work of this dissertation is described as followed. First, Design of row piles, Using Lizheng software design condition get the condition of internal force and displacement calculation results, and through these results, the use of civil Midas to analyze the protective force of pile and waling. In addition, it is proved that the stability of the foundation of calculated the heave of foundation pit. Second, Steel sheet pile wall design, 1# and 2# pier of bracing structure of foundation pit by 15 m long Larsen steel sheet pile to foundation pit protection, retaining structure size is larger than the dimension of not less than 1m, I-beam retaining piles into the ground and exposed ground 0.2m and excavation of foundation pit. 15 m steel sheet pile and the internal supporting strength and the overall stability of the foundation pit are also checked. Third, Slope excavation design, the slope of the foundation pit using the "sub- slope + spray anchor support" technology, a total of four- degree slope, and the use of Swedish method to calculate the safety factor of the landslide. On this basis, a simple description of the construction process for each of the program, as well as the matters needing attention. Finally, considering the existing foundation pit excavation, security and other factors, we chose the excavation scheme.