Abstract:
In the concrete pouring of the high arch dam, multiple cable cranes usually pour multiple pouring blocks based on strips. So the key to improving construction efficiency is to optimize cable cranes to the coordination of pouring blocks strips. The difference of transportation distance and strip area leads to different pouring efficiency of each cable crane, and simple equal surface of the pouring block hardly guarantees the strip collaborative pouring rise, then the pouring efficiency of the cable crane group is affected. In order to solve the above problems, this paper establishes an intelligent configuration model of cable crane group, which takes into account the pouring cycle time and load balance. Firstly, the pouring strip is divided for the area where the coverage of each cable crane overlaps with the pouring block and the configuration of cable crane group and pouring blocks is transformed into a combination optimization problem of the cable crane group and the strips. Subsequently, a “micro-matching” model which bridges the cable machine and multiple strips is proposed. The many-to-many relationship between cable cranes and pouring blocks is transformed into a one-to-one matching relationship between the cable crane and the micro strip, and the “micro-matching” integral expression of the pouring configuration optimization is established. Finally, the optimal configuration scheme of the cable crane group is obtained with the optimization objectives of cycle time and load balancing, and the coordinated rise of pouring strips is realized. The pouring configuration example of Baihetan arch dam shows that the pouring cycle time and lifting load of the cable crane is basically balanced. The average deviation of the upper cable crane pouring strength is-6.8%, and the average deviation of the lower cable crane pouring strength is 5.1%. This method has good adaptability to the change of the number of cable crane and pouring block, and has certain intelligent configuration ability.