Indoor measuring device for shearing wave velocity of soil body

Abstract

The invention discloses an indoor measuring device for shearing wave velocity of a soil body. The device overcomes the defects of the conventional technology for measuring the shearing wave velocity. The device comprises a vibration generator, a dynamic signal acquisition instrument and a computer; the output end of the vibration generator is connected with a vibration table top which is positioned on the right side of the vibration generator and vibrates in the left and right direction; a model box is fixed on the vibration table top; at least one pair of pressure sensors corresponding to each other in the left and right direction is arranged on the inner sides of the left and right side walls of the model box; the output ends of the pressure sensors are connected with the input end of the dynamic signal acquisition instrument; and the output end of the dynamic signal acquisition instrument is connected with the input end of the computer. The device can be used for measuring the shearing wave velocity of a soil sample with large volume and does not need to disturb the soil sample during measuring, so that the propagation length of the shearing wave velocity is relatively definite; meanwhile, the device only has the shearing wave of the vibrating direction, so interference of waves of other forms does not exit; and the invention has the advantages that: the device is convenient and easy to operate and direct and simple in calculation.

Description

technical field [0001] The invention relates to a measuring device, in particular to an indoor measuring device for soil shear wave velocity. Background technique [0002] At present, there are three main methods for measuring the shear wave velocity of soil: [0003] 1. Determine the maximum shear modulus through the resonant column test, and then back-calculate the shear wave velocity. The disadvantage of this method is that the volume of the measured soil sample is small, and the difference between the obtained shear wave velocity and the real shear wave velocity of the field soil is too large, and this method uses the measured dynamic shear modulus to back calculate the shear wave velocity formula It is also an empirical formula obtained through experiments, so the error is also relatively large. [0004] 2. The shear wave velocity of the soil sample was measured by the bending element method. The bending unit needs to be inserted into the tested object to a certain d...

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Problems solved by technology

[0006] In order to solve the above-mentioned deficiencies in the existing technology for measuring shear wave velocity, the present invention provides an indoor measurement device for soil shear wave velocity

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