The Engineering Simulation And Optimization Of Base Construction Of The Top-down Construction

Firstly, thesis introduces the advantage and expansibility of applying top-down to deep base construction in detail. Thesis grasps the key factors in performing top-down earthwork, applies the cycle-net model to top-down earthwork performance and makes use of computer simulation technique to simulate and optimize the whole performing process.To build cycle-net model which accommodates the top-down earthwork performance in optimizing process is the important part of the thesis. Thesis aims at the characteristics and corresponding performing process to set nodes with different type and function to fulfill the different tasks in simulation. Based on queue theory, thesis builds reasonable cycle-net model to make preparation for simulation.Another important part is computer simulation and optimization. Thesis gives time and cost of each scheme towards different machine collocation and analyses the result to choose optimum result in different situation. Thesis takes the advantage of time interval and event interval to write program with great application and adaptability. Corresponding interface is built as well to boost up the application and manipulation.Finally, thesis takes the Chuangxing Finance Building of Shanghai as example to validate the model and optimization system. After comparing, the model and simulation results are nicety and effective with perfect optimization effect.