The Numerical Analysis Of One Construction Channel's Stability And Ground Surface Settlement Based On Northward Rerouting Of Southern River Project

The urbanized advancement requests the environmental effect which produces by construction more and more high. Underground cut with shallow burden arises at the historic moment. In recent years, underground cut with shallow burden which has widely applied in many fields has displayed the positive role in the city underground engineering construction. Underground cut with shallow burden accumulating many years'experience will be used in the Northward Rerouting of Southern River Project. The thesis'surpport bases on the fourth bid project. The project is situated in the flourishing west fourth ring road. The especial ambience puts forward higher request to the design and constructing. Unifing the correlation research results,it analyses the reinforcement structure and around rock mass and ground surface settlement through the fast lagrangian analysis for continuum in the process of deep pit, construction channel and main tunnel constructing. The thesis well uses the numerical analysis in the underground project which is constructed by underground cut with shallow burden. The thesis mainly includes following content.1. Summarizing smiliar project's experience and analyzing the engineering geological conditions, groundwater conditions, ambience and research matters, it generalizes the geological model. It establishes the numerical calculating model through ANSYS.2. Considering the material characteristic, it adopts null model, elastic isotropic model and Mohr-Coulomb criterion through the fast lagrangian analysis for continuum. It calculates the researching matter through FLAC3D and analyses the result through the numerical analysis. The results show that the reinforcement structure and around rock mass is safe and steady. Then it summarizes the law of vault settlement.3. Through anglyzing the action pattern and synthesizing the results, it emphasizes the disadvantageous effect of anisomerously additional load acting on the excavation of deep pit and wharf gate. 4. Through analyzing the range and quantity of ground surface settlement, it summarizes the law of ground surface settlement and suggests that should enhance upper bench's constructing measures.5. Synthetically analysizing the results, it puts forward that it must reinforce the important parts and guarantee the five wharf gates'safety preventing the big distortion of reinforcement structure and around rock mass.