A Continuously Penetrating Mechanical Cross Plate Shear Meter with Clutch Gears

Abstract

The invention discloses a continual-injection mechanical vane-shear apparatus with clutch gears, comprising a torque steel ring, an outer pipe, an inner rod, a pipe shoe, and a cross vane, wherein thebottom of the outer pipe is connected with the pipe shoe, an upper clutch gear and a lower clutch gear are arranged in the pipe shoe, the inner rod is composed of an upper rod section and a lower rodsection, both the upper rod section and lower rod section are in a split type, the bottom of the upper rod section is fixedly connected with the upper clutch gear, the top of the lower rod section isfixedly connected with the lower clutch gear, and the upper clutch gear and the lower clutch gear work together to realize connection and separation of the upper rod section and the lower rod section; the cross vane is fixedly arranged at the bottom of the lower rod section; four guided inclined bosses are arranged in the periphery along an opening at the bottom of the pipe shoe and stripped holes for accommodating blades of the cross vane are arranged between adjacent guided inclined bosses. Under a guided effect of the guided inclined bosses in pressing process, the cross vane can be exactly put in the stripped holes along inclined faces of the guided inclined bosses to protect the cross vane to implement a continual injection.

Description

technical field [0001] The invention belongs to the improvement of a cross-plate shear instrument in the field of geotechnical engineering investigation, in particular to a mechanical cross-plate shear instrument with clutch teeth that can penetrate continuously. Background technique [0002] In geotechnical engineering investigation, in order to determine the soil layer distribution and related physical and mechanical parameters of the foundation, it is usually necessary to take undisturbed soil samples for indoor tests, but because the soil samples will be disturbed during the process of taking soil samples, the in-situ test results are obtained. wider application. In soft soil areas, where the soil has high water content and low shear strength, the cross-plate shear test can accurately measure the shear strength of the soil, so it has unique advantages in the fields of foundation bearing capacity and stability calculation. [0003] Existing cross-plate shear instruments ...

AI Technical Summary

Problems solved by technology

[0004] The existing clutch-type mechanical cross-plate shear instrument can correct the frictional resistance between the inner rod and the casing, but because the head of the cross-plate is exposed outside the pipe shoe, there is no protection of the pipe shoe, so continuous penetration cannot be performed.

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