关键词: U型槽, 内外压强度, 正态性, 农田水利

Abstract:

U-shape groove is a major type of the anti-seepage lining in small irrigation and drainage canals, and its internal and external pressure strength is an important quality indicator. Shapiro-Wilk test, D.Agostino test, skewness-kurtosis test and normal Q-Q test were used to do normality test for detection data of the U-shape groove's internal and external pressure strength collected in 2011~2012. According to the results, the normal distribution probability density functions of pressure strength data were established. Furthermore, the strength values of the U-shape groove with 95% guarantee rate were also obtained. It could provide an effective and theoretical basis for formulating fabrication and detection specifications of U-shape groove and other concrete precast units in small-scale irrigation and drainage projects.

Key words: U-shape groove, internal and external pressure strength, normality, irrigation and drainage