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一、前言目前我国养护坑仍占整个养护设施的70％以上。但由于绝大多数养护坑没有采取保温、防水、防汽措施和供汽方法不合理,使混凝土养护普遍存在着能耗大、周期长、养护质量低下的严重问题。其热效率一般不超过20％。近几年来很多科技人员从事了坑体改造工作,如采用保温、防水、防汽措施,并将花管供汽方法改为热介质定向循环养护方法等。这些方法在节
I. Preface At present, China’s conservation pits still account for more than 70% of the entire conservation facilities. However, due to the fact that most of the conservation pits have not adopted insulation, waterproofing, steam prevention measures, and unreasonable supply methods, concrete conservation has a serious problem of large energy consumption, long cycle, and low maintenance quality. Its thermal efficiency is generally not more than 20%. In recent years, many scientific and technical personnel have been engaged in the pit body transformation work, such as the use of thermal insulation, waterproof, and steam prevention measures, and the method of steam supply pipe was changed to the hot medium oriented circulation maintenance method. These methods are in the section