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动力触探的标准贯入试验,是土层地基勘探中应用较为广泛的一种原位测试方法。用这种方法可以简便而又迅速地取得地基土的近似承载力等有关数据,为工程建筑物的设计、施工提供重要的地质资料。标准贯入试验的原理是,以63.5公斤的重锤从76厘米的高度自由降落,将标准贯入器打入土中,并得出打进30厘米的锤击次数N;N值的大小,表示土层对贯入器的阻抗力,反映出土的一些力学性质。
The standard penetration test of dynamic penetration is a kind of in situ testing method widely used in the exploration of soil foundation. With this method, the relevant data such as the approximate bearing capacity of foundation soil can be obtained easily and rapidly, and provide important geological data for the design and construction of engineering buildings. The principle of standard penetration test is that, with a weight of 63.5 kg, it descends freely from a height of 76 cm, penetrates the standard penetrator into the soil, and obtains the number of hammering N of 30 cm. The value of N, That the soil resistance of penetration into the device, reflecting some of the mechanical properties of soil.