Optimization Design Of Diaphragm Wall Supporting Structure Of Deep Foundation Excavation

With the sustainable development of domestic urban construction, we pay more and more attention to the development and utilization of underground space and the number of deep foundation pit has become larger and larger. Therefore, optimal design of deep Foundation pit support project has a very important economic and social benefits. This paper focuses on application of underground diaphragm wall in deep Foundation pit support project and has established an optimization analysis model to analysis the diaphragm wall supporting structure of the deep foundation support design of China Southern Airlines Headquarters of San-ya. The main resultss in this paper are as follow:(1) This paper pointed out that diaphragm wall in design and calculation of earth pressure theory and finite element method analysis of structure stress model though an introduction to earth pressure theory and introduction to finite element method of elastic rod and introduced the optimization design theory and its solution methods.(2)By analyzing the internal force and deformation of diaphragm wall and the ground settlement around foundation pit in the excavation of foundation pit and changing the design parameters of diaphragm wall such as diaphragm wall thickness, embedded depth and supporting position, this paper investigated the design parameters and force-deformation relationships of diaphragm wall.(3)The existing design of diaphragm wall has been optimized by the established evaluation model and the optimal design parameters of diaphragm wall have been figured out by Matlab optimization toolbox. It has founded that the optimized scheme is better than the original design by comparative analyzing the stress and deformation of diaphragm before and after optimization. So the evaluation model is feasible.(4) Under the premise of deformation control to meet the appropriate regulatory requirements this paper comparative analyzed the integral stress and deformation of diaphragm under the overall three-dimensional model before and after optimization, internal force is more reasonable and the utilization of materials is better. By presetting prices for materials, the cost savings is about2.85million Yuan after optimization. Further validate the optimization is successful.