Research On Deep Pit Support Design Optimizing And Engineering Demonstration

Because China has a huge population, to save land, the construction of massive high-rise buildings and making full use of urban undergroud space are necessary. And it leads to the digging and support of large-scale excavation projects, as well as the necessary and safe environment of underground construction. Construction of deep excavation and support of pit wall involves not only the the coplexion of the venues hydrological and geological conditions, but also feasibility and difficulty of construction under limited space environment. Therefore, the suitability, security and economy of the pit support design will be the initial considerations when the owners determine the design and construction plan.Optimal pit support design shares obvious target on construction features, hydrologial, engineering geological and environmental conditions. It highlights the rational, scientific design results and reflects the outcome of suitability, security and economy. The preferred type and optimization of the calculation of supporting design is the key to solve the difficulty and importance.This essay offers an optimal support design by giving the design project of Hunan People's Radio Broadcasting Office Building. To confirm a safe and reliable support design related to engineering geological and environmental conditions of deep pit, two support design of concrete earth gravity wall and drilling bored reperfusion in addition to the water-proof curtain have been implemented respectively to be safe considering the factor of abundent underground water. This essay gives the design calculation and stability check of these two designs. In order to achieve complete analysis of the supporting effect, the large-scale geotechnical software PLAXIS is used to simulate two supporting design and the approach of finite element is employed to analyze the force and displacement on components. Comparing with the calculation results, variance analysis is carefully carried. This essay offers a meaningful instuction to the project on support design and construction...