Page - 797 - in Book of Full Papers - Symposium Hydro Engineering

construction conditions of cable casting interference and joint simulation of the rules. Ren [12] proposed a mobile crane real-time anti-collision system. In order to analysis the time-space collision in the process of pouring of the storehouse. It is necessary to figure out the basic construction procedure and activities logical relationship, then to simulate and analyze the plan implementation process, and find out the origin of collision and propose adjustment method to avoid collisions and improve construction efficiency [13-16]. To solve the above problems, the time-space evolution model of storehouse entities is established. Then analyzes the mechanism, classification and effect of the collision of storehouse construction entity. The time-space collision simulation and detection analysis model for the storehouse based on the pouring behavior simulation model were established. The results shows that this model can provide a scientific basis for the analysis and optimization of storehouse. 2. TIME-SPACE EVOLUTION MODEL OF STOREHOUSE CONSTRUCTION In the construction of high arch dam, efficient construction machinery is usually apply to complete the work. Since there are many contents works on the storehouse surface, different types of construction machinery are required to cooperate with each other. However, the operation modes and efficiency of different machines are different. Therefore, it is necessary to establish the time- space evolution model of different mechanical surface activities to analyze the construction state such as operating status and running trajectory and so on. The entity in the storehouse can abstract as a mass point, and its trajectory changes with time in the three-dimensional Euclidean space [17-18] is a spatial curve. The point trajectory is divide along the curve according to a certain time step Δt. Based on the trajectory of the point in the coordinate system, the point begins to move along the space curve from point Pt at the time t and arrives at the point Pt+1 at time t+1, r(st) and r(st+1) are the arc lengths of the curves at Pt and Pt+1, respectively. As shown in Fig.1, the velocity and acceleration of the point moving along the curve can express as: v(t)=ds(t)/dt [1] a(t)=dv(t)/dt=d2s(t)/dt2+(ds(t)/dt)2 [2] Fig. 1 Time-space path diagram 797