Study On Dynamic Visual Simulation And Optimization For Ludila Underground Structure Group Construction

The underground structure group construction of Ludila hydropower station is a very complicated process, which is affected by many factors, such as the large scale and concentrated collocation of underground structures, various working procedures, and complex geological conditions. With traditional calculating and analyzing methods, it is difficult to get reasonable construction scheduling. Based on the methodology of system simulation, dynamic visual simulation and optimization for Ludila underground structure group construction is studied in this paper. The main research contents and achievements are summarized as follows:(1) Based on the system analysis and coordination for Ludila underground structure group construction, a hierarchical and modular modeling method is presented, and the simulation modeling course is expatiated. In order to determine the optimum model parameters, a series of schemes analyses by simulating methods are processed, and then the reasonable construction parameters and optimal mechanical equipment allocation are obtained.(2) Cooperating closely with the construction organization and design work, and with consideration of the dependency relationships among working procedures, the author carries out in-depth research on construction simulation and schedule optimization for Ludila underground structure group. The simulation results are analyzed to get much important information such as feasible construction period, reasonable construction scheduling, critical path, optimal construction intensity and the utilization of mechanical equipment. Moreover, the project completion probability and the traffic and transport system are analyzed, which can provide good basis for construction scheme demonstration.(3) The idea of introducing 3D geological modeling technique into construction simulation for underground structure group is presented. According to original geological data of the project, the 3D geological model of Ludila underground structure group is set up for describing complex geological conditions, which is also referred to realize the dynamic visualization analysis for construction process with more engineering geological information. It highlights a new direction to combine the construction simulation with engineering geology. (4) By integrating the 3D digital graphics of engineering construction with the corresponding construction information and geological information at any time, 3D dynamic demonstration for the construction process of Ludila underground structure group is carried out. It can represent the logical relationships in time and space among working procedures, and describe the complicated construction process comprehensively and vividly, which offers an effective means to analyze and verify the simulation results of Ludila underground structure group construction.(5) According to the construction characteristic of Ludila project, and by combining simulation modeling technique and 3D geological modeling technique, the software system of construction simulation and optimization for Ludila underground structure group (ESAS-LDL) is developed. It provides a powerful calculation and analysis tool for construction system research of complicated underground structure group.