Optimization Design Of Deep Excavation And Its Application Base On MATLAB

Deep excavation is a venture project, its risk represent that excavation supporting structure is a provisional establishment, once the basement completed it will blank out. So the risk of excavation structure represents that rationality of supporting scheme and economy of investment. How to choose a best scheme of the two factors, it's the intention of deep excavation optimization design. Its function is to protect the stability of deep excavation and the safety of the structures and establishments around the deep excavation. It will be wasteful if the choice and design of the supporting structure is too safe, so optimal design is very important when we design the supporting structure of deep excavation. Optimal design is the only way to develop the deep excavation retaining system.Currently, the types of supporting structures are so many that it will still be a difficult problem of how to choose one appropriate supporting structure and gain the accurate parameters. This paper analyzes several cross-sectional supporting structures, and discussing some of the parameters. This paper investigates several destructive forms of supporting structures, and expatiates some ways of optimal design which we use frequently now, and shows the advantages of multi- objective optimization. This article also sets up a mathematic model of deep excavation retaining system, and uses multi-objective optimization to design a supporting structure.This paper investigates single-objective optimization and multi-objective optimization to design support structure, the main contents have follow three points:1. It analyzes the soil pressure of supporting structures in a deep excavation design and discusses the methods of soil pressure account in the course of excavating a deep excavation.2. It analyzes several cross-sectional supporting structures, and discusses some of the parameters; and investigates several destructive forms of supporting structures.3. It analyzes several cross-sectional supporting structures in deep excavation, including line-pegs supporting structures, earth-soil supporting structures and inside supporting structures. It analyzes several optimal theory and methods in common use.In pegs supporting structures, making certain the supporting position has great influence of supporting structures, so the optimum of supporting position will result all other parameters' change. In the same way, the parameters of embed depth, peg's diameter and so on are influent each other.This paper uses MATLAB language to design programmer of single-objective optimization and multi-objective optimization, this paper also sets up a mathematic model to optimize the design of actual deep excavation, and gets out the optimal results of single-objective optimization and multi-objective optimization. From the results we can see that multi-objective optimization is more reasonable than single-objective optimization, and more approaching actual design.