高寒地区隧道保温防排水技术与应用

A dissertation on heat preservation waterproof and drainage technology of tunnel and its application in extreme cold area

介绍聚氨酯保温层现场发泡喷涂技术和隧道冻害预防、防排水、保温相结合的综合防排水技术的应用，通过技术研究并推广应用，有效地保证高寒地区隧道的排水顺畅和冻害预防，解决困扰多年的高寒地区隧道施工的技术难题。

This paper introduces the foaming and spraying technology of the polyurethane foam insulation layer, and frost damage pre-vention, and the comprehensive application of waterproof and drainage and heat preservation technology in tunnel, through technologyresearch and application, effectively guarantee tunnel drainage unobstructed and frost damage prevention, and solve the technical diffi-culty of tunnel construction for many years in extreme cold area.