Study On Parametric Design And Schemes Optimization Of Underground Powerhouse Based On 3D Geological Model

Design of underground powerhouse is often involved in hydropower engineering in China. Underground powerhouse is a large underground structure group with some anfractuous structures in space. There are some phases for design of underground powerhouse from initial design to final design. Design scheme is often amended repeatedly, and therefore much work is involved in design of underground powerhouse. Geological condition is the most important factor that impacts design of underground powerhouse. Underground powerhouse is often designed in the mountains. Geological conditions are often complicated in the region of underground powerhouse. 2D design of underground powerhouse has some limitations that it is difficult to design intuitively, quickly and interactively. The theory and the application for 3D parametric design of underground powerhouse are studied deeply using interactive technology, parameterized modeling technology and database technology based on the theory of parametric design and 3D geological model. The three main achievements are as follows:(1) Academic issues related to parametric design of underground powerhouse are discussed. The concept for parametric design of underground powerhouse and the method for parametric design of underground powerhouse based on 3D geological model are proposed. The top-down and bottom-up design process is involved in parametric design of underground powerhouse. Based on 3D geological model, the location, the direction of the axis and the cross-section of underground powerhouse are designed through identification, expression and solving of constraints associated in parametric design of underground powerhouse. 3D model for design scheme of underground powerhouse is built based on the key algorithm of 3D modeling.(2) According to complexity and diversity of design of underground powerhouse, the method for schemes optimization analysis of underground powerhouse is proposed. The general factors related to design of underground powerhouse are considered, and deliberated index system of design scheme of underground powerhouse is built. The evaluation and optimization method of design scheme of underground powerhouse is achieved through weight calculation of deliberated index and quantitative analysis of design schemes of underground powerhouse.(3) The system for parametric design of underground powerhouse is developed based on the theory and the method for parametric design of underground powerhouse. The principle and aim of the system is confirmed through demand analysis of designers. The holistic design and functional design of the system are achieved. The application process of the system is expounded. The functions of the system including axis design module of underground powerhouse, 3D modeling module of underground powerhouse, analysis module of design scheme and output module of design scheme are developed. The functions of the system satisfy the requirements of application in design of underground powerhouse.The theory, the method and the system for parametric design of underground powerhouse have been studied with application in the design of underground powerhouse in a pumped storage power station project. The system for parametric design of underground powerhouse has important value of engineering application. It is helpful to improve the efficiency and the level of the design of underground powerhouse in hydropower engineering.