中继间法,是桥涵顶进方法之一。在长距离顶管中用于分段顶进而设在管段中间的封闭的环形小室。中继间装置作为顶管施工中的重要装置,一般用钢材制作,沿管环设置千斤顶,在长距离泥水平衡顶管中起着重要的作用。文章以南水北调配套工程郑州城区供水配套7标为例,结合PCCP顶管中继间接力顶进装置的改进设计,对中继间顶进施工技术进行了介绍。 Relay between the law is one of the culmination of the bridge and culvert. In a long-distance pipe jacking for the sub-head and set in the middle of the closed section of the annular chamber. As an important device in the construction of pipe jacking, the inter-relay device is generally made of steel material. The jacking along the pipe ring plays an important role in the long distance slurry balance pipe jacking. In this paper, an example of water supply ancillary facilities in Zhengzhou City of South-to-North Water Diversion Project is taken as an example. Combined with the improved design of the overhead jacking device of PCCP pipe jacking relay, the construction technology of jacking in the relay is introduced.