English：

Aiming at the dry climate and large temperature difference of a tunnel, which leads tountimely and irregular secondary lining maintenance, drying and shrinkage cracks and slow strengthenhancement, we independently researched, developed and designed a simple and high⁃efficiency steamcuring cart, which includes the main cart skeleton, walking system, heat preservation and moisturizingstructural layer, peripheral airbag blocking module, electric power system and high⁃power steamgenerating system, etc. , and carried out the field processing and application. The study shows that thestructure of the steam curing cart can meet the structural safety calculation in the context of processinstallation and application. Steam curing cart is simple, efficient, field processing and production testslearned that the overall production and processing cycle for 17d, the comprehensive cost of 240,000yuan. The strength of secondary lining C35 concrete under 7d curing is 25. 6% and 49. 5% higherthan that of spraying and natural curing respectively, which realizes the purpose of rapid improvement ofstrength; the strength of 56d curing is 5. 7% and 10. 8% higher than that of spraying and natural curingrespectively, which meets the needs of tunnel curing in dry environment.