Apparatus for measuring shear strength of field soil and classifying method by use of it

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring the on-site shear strength of construction waste and to a method for selecting shear strength using the same. A mold having a cylindrical shape of a predetermined volume and having an upper and a lower surface and containing a sample of cokes; A cylinder for transferring a bogie, which generates a power required for movement of the bogie; A bogie separated from the mold after the mold is moved to the chute side or the shear-strength side to the transfer needle side or the shear strength of the coke is measured; A horizontal chisel for cutting the waste coke projected from the upper part of the mold, which moves to the conveying needle side along the ladle in the state of containing the waste coke; A needle driving cylinder for generating power necessary for raising and lowering the shear strength transmission needle; Shear resistance in response to the upward movement of the needle driving cylinder in a mold in which a predetermined pressure is applied at the same time when the piston is pressed by a pressurizing and discharging cap. A load cell for measuring the resistance of the sphere to an electric signal; And a shear resistance detecting port having a predetermined shape at a lower end thereof. The sheath resistance detecting hole is inserted into the mold cavity in response to the lowering operation of the needle driving cylinder. Then, the mold is clamped by the sheath pressurizing and discharging cap and a predetermined pressure is applied A shear strength transfer needle which escapes from the waste gas in the mold in response to the upward movement of the needle driving cylinder and measures shear resistance; A cap actuating cylinder for generating power necessary for operating the evacuation and discharge cap; A coke pressurizing and discharging cap for discharging the waste coke in the mold to the outside through the bottom opening of the mold after completing the measurement of the shear strength of the coke soot as well as compaction of the waste coke contained in the mold at a predetermined pressure; A mold fixing device which fixes the mold so as to have a floating state in the air when the mold is loaded on the vehicle or when the waste coke is discharged from the inside of the mold to the outside using the coke oven pressing and discharging cap after the measurement of the shearing strength is completed; The operation of the cylinders is controlled and the shear strength of the coke waste measured through the load cell for measuring the shear strength is calculated and compared with the reference shear strength set in advance, it is judged whether or not the coke is to be reused for construction or discarded. And a control unit for displaying the image data. Therefore, it is possible to accurately select and classify high quality gravel and bad gravel so that it can be reused as high quality gravel for construction work, which can greatly improve the commerciality and reliability of construction waste used for construction construction. Especially, Minimization of environmental pollution caused by waste, substitution of scarce resources, and cost reduction throughout the construction industry can be aggressively promoted.