用于塔群防碰撞分析，将三维空间内的运动转化为二维平面问题，判断塔吊是否可能发生碰撞。同时给出一套相应的避让策略。-Tower and prevention for crash analysis, the movement into three-dimensional space within the two-dimensional problem, determine whether the crane collision may occur. And gives a corresponding

大桥混凝土结构表面涂层防腐蚀范围包括：表湿区的承台、桥墩和索塔的下部；表干区的桥墩和索塔上部、箱梁、装饰块和防撞护栏底座等。涂层系统由底层、中间层和面层组成，面层涂料颜色暂定为海灰色，色号B05