六十年代前后,单层厂房混凝土地面工程大都采用现浇混凝土垫层和1:2水泥砂浆面层,所用的混凝土标号并不高,一般在100号以下。随着高标号水泥的产量逐年增长,近年来已较普遍地采用了标号较高的混凝土做垫层兼面层,随捣随抹光的构造型式。这里我们统称混凝土地面。它在单层厂房中量大面广,遍及各行各业,每年要耗费国家一大笔基建投资。长期以来,混凝土地面的伸缩缝从设计到施工都存在着不少问题,严重地影响地面工程的质量。本文主要就现行《工业建筑地面设计规范》(TJ37-79)(以下简称设计规范)并参照相应的《地面和楼面工程施工及验收 Before and after the 1960s, concrete floors for single-storey factory buildings mostly used cast-in-place concrete cushions and 1:2 cement mortar surfaces. The concrete labels used were not high, generally below 100. As the output of high-grade cement has increased year by year, it has been more common in recent years that concrete with a higher number of markings has been used as a bedding-facing layer, and the type of concrete with which it has been troweled has been used. Here we collectively refer to concrete floors. It is widely used in a single-storey factory building and it covers all walks of life. It costs the country a large amount of infrastructure investment every year. For a long time, there have been many problems in the design and construction of expansion joints for concrete floors, which has seriously affected the quality of surface engineering. This article mainly refers to the current “Code for the Design of Industrial Buildings” (TJ37-79) (hereinafter referred to as the “Design Code”) and refers to the corresponding “Construction and Acceptance of Ground and Floor Engineering”.