本文提出了混凝土结构表面裂缝宽度测试技术的理论,并且介绍了所用的仪器,当使用裂缝显微镜或机械的和电气的测量仪器的其它较为标准的裂缝测试方法不适合时,本法显得最有价值。采用本仪器测试简便、精确,用它在反复荷载下进行了裂缝宽度测量。本仪器可遥控,可严密包封,防止潮气侵入,既可在水下又可在地下等现场条件下使用。 This paper presents the theory of testing the surface crack width of concrete structures and introduces the instruments used which are most valuable when using the more common standard fracture testing methods of fracture microscopy or mechanical and electrical measuring instruments . The instrument used in this test is simple and accurate, and it measures the crack width under repeated load. The instrument can be remote control, can be tightly encapsulated to prevent moisture intrusion, both under water and underground conditions such as the use of the scene.