装配式结构与传统的现浇结构相比具有节能、环保、节省模具、工期较短等特点，已在地上建筑中获得了飞速发展。由于地下环境复杂，地下装配式结构接头部位的防水处理成为难题，因此，地下装配式结构近几年在我国才刚刚起步。本文在分析地下装配式结构的接头形式和防水技术现状的基础上，提出了应用环氧灌浆料对预制装配式结构接头进行灌封，通过试验研究了环氧灌浆料本身及其黏接混凝土的力学性能。同时还针对明挖法修建的技术特点，介绍了基坑肥槽预拌固化土回填技术，阐述了预拌固化土对地下工程结构防水的作用，研究成果可供类似工程参考。

Compared with traditional cast-in-place structures, fabricated structures have the characteristics of saving energy, protecting the environment, eliminating mold, and short construction times. Fabricated structures have been developed rapidly in above-ground buildings. However, the use of underground fabricated structures in China has only recently begun. Owing to the complexity of the underground environment, waterproofing underground fabricated structure joints remains a problem. In this paper, based on an analysis of the joints of an underground fabricated building and of the current state of waterproofing technology, we propose the use of an epoxy grouting material, which is used to pot the prefabricated structure joint, and study the mechanical properties of the epoxy grouting material and its bonded concrete. At the same time, we introduce backfilling technology for prefabricated solidified soil in the foundation pit, and expound the effect of the prefabricated solidified soil on the waterproofing of the underground engineering structures. The research results are good references for similar engineering projects.