一、地下工程施工环境保护的卫生学意义空气与人的健康有着极为密切的关系,它直接参与人体的新陈代谢和体温调节。一个成年人每天大约要吸进11000多升的空气,才能保证吐故纳新过程的正常进行。空气是多种气体的混合物。其中主要成分有氮、氧、二氧化碳等(见表一)。此外,随着所处环境的不同,空气中还有水蒸汽、微生物、灰尘等,其含量的多少视具体情况而异。 First, the hygienic significance of underground construction environmental protection Air and human health has a very close relationship, it is directly involved in the body’s metabolism and body temperature regulation. An adult inhales about 11,000 liters of air a day, in order to guarantee the normal progress of the new procedure. Air is a mixture of gases. The main components of nitrogen, oxygen, carbon dioxide, etc. (see Table I). In addition, depending on the environment, the air also contains water vapor, microorganisms, dust and the like, and the content thereof varies depending on the circumstances.