十字板剪切试验 (2).ppt

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十字板剪切试验 Testing equipment Testing equipment includes: 1、punding host 2、cross plate splot Testing equipment: Testing equipment includes: 1、punding host 2、cross plate splot 3、 dict.cnki.net/dict_result.aspx?searchword=%E6%89%AD%E5%8A%9B%E4%BC%A0%E6%84%9F%E5%99%A8tjType=sentencestyle=t=purpose+torsion+sensor 4、mesurement torsion instrument 5、machine which apply torsion and other assistant equipment Picture14-1 principle of the vane shear test a) cross plate leaf b)cylinder soil body made by cross plate leaf Specification of the cross plate: the high rectangle the rectangle the dwarfing rectangle the diamond Plate width Plate height Plate thickness Edge angle Axle diametre Area ratio Now there are two kinds of the cross plate shear instrument: the open steel ring type and the electric measurement type. 1、The open steel ring cross shearing instrument can also be called the mechanical type cross type shearing instrument.It is a cross plate head which use rotating worm wheel to insert in the soil layers and measure the resistance moment by open steel ring which can be used to calculate the shear strength of the soil. 2、The main difference between the elastic measurement cross shearing instrument and the open steel ring ones is that they have different force measuring equipment.the It use resistance strain gauge 、digital force measurement unit and electronic potentiometer to measure the shear torsion moment . It has been proved that the elastic measurement cross shearing instrument i

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