Research On Multi-objective Optimal Design And CAD Of Underground Structure

With the global resource shortage and enviroment deterioration,the development and utilization of underground space has been put on a very important position,and the scope of engineering construction has been extending.Reasonable design of the underground structure is an important insurance for exploiting of resource of underground space.Base on these,the multi-objective optimal desidn and CAD technology of underground structure is studied. The principal contents arelisted as following:1. The types,calculation theories and design models of underground structure are discussed.The mechanic behavior of underground structure during construction and operation is analyzed and the relative principles of enclosing rock's stability are given.This article is also about the wide use of CAD technology in engineering design and its technology of development in the future.2. The mathematical model of multi-objective optimal design is established. In the model,displacement deviation of the characteristic points at cavern perimeter and the area of plastic zone are chosen as an objective function.sizes of geometric shape of the cavern are chosen as design variables,and some design demands are considered as constraint conditions.3. directed against the underground structure,the complex method is modified and improved during optimal proceduce,And a computer program of the multi-objective optimum design is developed.4. According to the interface technology criteria of DXF and SCR, underground structure optimization CAD softwares are programmed by advanced computer languages, which directly transform caculation results into CAD construction plans,and thus improve design efficiency greatly.