为解决武汉江夏清水入江项目八分山片排水改造工程盾构隧道始发井空间狭小、无法按常规始发施工技术进行盾构设备组装、始发掘进施工的难题，通过对工程水文地质、始发井及隧道结构进行分析研究，并对盾构附属设施、负环结构、出渣系统等进行改造，增加临时推进装置，提出一种分部组装与分部推进相结合的分体始发施工技术，可解决始发空间小、盾构组装、始发与设备材料垂直运输、人员进出困难的问题，始发施工过程安全、顺利，地面沉降符合要求，说明采取的分体始发技术实施效果良好。

In the BafenshanDrainage Reconstruction of Wuhan JiangxiaClear River Discharge Project, due to the narrow and small space of the launch shaft of shield tunnel, shield tunneling equipment assembly and launch tunneling can not be carried on by adopting conventional launching construction technology. In order to solve such problem, the engineering hydrogeology, launchshaft and tunnel structure are analyzed and studied. Some parts of the shield such as subsidiary facilities, temporary ringand slag discharging systemare modified. Temporary propulsion devices are added.Finally a kind of separate construction technology with the combination of partial assembly and partial propulsion is proposed.The construction technique can solve the problems of limited launching space, shield assembly, launching and equipment parts vertical transportation, personal access and so on.The launching process is safe and smooth and the ground settlement meets the requirements, indicating that the effect of the separate launching technology is good.