GIS-BASED DYNAMIC THREE-DIMENSION VISUAL SIMULATIONFOR DAM CONCRETE CONSTRUCTION PROCESS

摘要

The construction of concrete dam is an extremely complicated system project withlots of influencing factor. This paper establishes the model of construction simulation by usingqueuing theory; the construction system is considered as an exceptive queuing serving system.It accords with the practice construction process to apply time-event driven method to drivechange of state in system. Not only remedies the influence of simulation precision that time stepbrings ,but also effectively deals with the relationship between master clock and secondaryclock. According to the requirement of visual simulation in waterpower project, making datamodeling by using discrete contour line data base TIN, establishing digital terrain model(DTM)by transforming random lattice to formula grid;, organizing time and spatial data of placingblocks, this paper establishes 3D digital model of dam which corresponds with space and time.The dynamic visual system of concrete dam construction process(DCVS) was developed by theauthors. Aimed at the characteristic of XiangJiaBa project, apply the placing machine model ofconstruction with several kinds of device set. Based on GIS, express the complex space-timerelationship among all aspects of the project schedule, and provide the basis data of visualdecision-making for scheme optimization, construction machinery matching, optimizingexecution program of work.