基于悬链线理论 ,建立了猫道施工控制计算的迭代法 ,以此确定猫道线形、承重索无应力长度等。特别地考虑了中跨、边跨由于分离布置而产生的不平衡水平力及其影响。宜昌长江公路大桥的应用表明 ,提出的计算方法精度高、收敛速度快 Based on the catenary theory, an iterative method of catwalk construction control was established to determine the cat’s line shape and the stress-free length of load-bearing cable. In particular, the unbalanced horizontal force and its influence due to the separate arrangement of the midspan and the side span are considered. The application of Yichang Yangtze River Highway Bridge shows that the proposed method has high accuracy and fast convergence