本文详细地介绍了湖南省洞口县一座单孔40米跨径刚架拱桥采用无扣索转体新工艺施工的有关情况,它较之国内已建成的用有扣索转体工艺说来,又是一项改进,是适合在深谷和两岸场地狭窄地区修建中等跨径拱桥较好的施工方法。全文共分五部分:一、设计简介;二、转动体系的构造;三、设计计算原则;四、转体施工工艺及技术指标;五、应注意的问题等。 This paper introduces in detail the related situation of the construction of a single-hole 40m span rigid-frame arch bridge in Dongkou County, Hunan Province, using the new technology without buckle-bar turning. Compared with the built-in buckle-turning technology in China, Is an improvement and a good method of construction suitable for the construction of medium-span arch bridges in the deep valleys and in narrow areas on both banks. The full text is divided into five parts: First, the design briefing; Second, the structure of the rotating system; Third, the design and calculation principles; Fourth, swivel construction technology and technical indicators; Fifth, should pay attention to the problem.