Bracing Optimization Design Analysis And Application

That Deep foundation pit bracing digging and protecting for the wall, it is not only facing the complexity of the land hydrological and engineering geological condition, and also need consider the construction difficulty and feasibility under the extremely limited soil. Therefore the adaptability, safety and the feasibility of the economy for the foundation pit bracing, is the major basis of proprietor definite the program of design and construction.The optimization design of the foundation bracing system is for the engineering characteristic, hydrology, engineering geological condition, it need emphasize the rationality and scientific design results, and the feasibility, safety, economy should be showed better in it.The paper comprehensively and systematic analyzed and studied the influencing factors, the characteristic when under pressure, mechanism of action and applying effects of several universal application types were chose in many foundation bracing structure types. It suggests the key points and the method for optimization design the foundation bracing structure, it can be the guidance, and also can be directly applied in foundation bracing design.This paper has three structure types optimization design of pile-row retaining and protection structure, cement retaining and protection structure, soil-nailing wall through analyzed that, which is optimization the design parameters of bracing structure, influencing factors, support mechanism. It has practical guidance for application.It supports the optimization design of the soil layer stock through the analysis the diameter, length, strength and the properties of soil layer stock.It through analyzed the optimization design of water controlling project and several method to reduce the water levels, it putted aims optimization design in order to achieve good effect on control water in the foundation pit.It suggested the application method for the optimization design of foundation bracing through the analysis of the local soil reinforcement strengthened the foundation bracing. Reinforcement for the local soil is taking the material' s properties of the foundation pit soil, raising the design value of the foundation bracing. It has the practical application value, can be directly used in project.It thought that the bracing engineering optimization project should have good environmental adaptability through the analysis of the dependent relationship between the foundation bracing engineering system and environment. Through research the connects on the subsystems insupporting system and the inner of secondary subsystems, it put forward the characteristics of their interaction and mutual restriction, and this has more strong guidance, and can be directly applied in the foundation bracing design.Through the process analysis research for base hollow project optimization design, have put forward the 3 layers of of optimization design: The related main points of scheme optimization, detail optimization and informative construction. According to establishment base hollow project optimization design analysis model, divide into base hollow project optimization design method 3 levels go on: First level is to analyse based on expert system, for participating in the scheme of optimization , forms the base hollow project scheme fair of primary election; Second level is to calculate and analyse for each base scheme of the hollow project scheme concentration of primary election , than choose; The level of 3th is on the foundation in 2 level optimization results, select last scheme , and carry out more further design.