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直剪试验因受仪器结构的限制 ,只能以剪切速率的快慢来控制试样的排水条件。通过宁波大榭 34组软土原状土样的室内试验分析 ,剪切速率 0 8mm min和 2 4mm min所得的直剪固结快剪强度 ,前者比后者内摩擦角平均大近一倍。对照三轴固结不排水试验成果的分析 ,认为 2 4mm min速率对本软土较适宜。
Direct shear test due to the limitations of the instrument structure, only the speed of the shear rate to control the sample drainage conditions. Through the laboratory test of the 34 groups of soft soil samples in Daxie, Ningbo, the shear strength at shear rate of 0 8mm min and 24mm min are much higher than that of the latter. According to the analysis of the undrained test results of triaxial consolidation, it is considered that the rate of 24 mm min is more suitable for this soft soil.