Handheld constant rigidity ring shear apparatus and using method thereof

Abstract

The invention discloses a handheld constant rigidity ring shear apparatus. The ring shear apparatus comprises a mount and an annular steel frame sleeved with the mount, wherein an upper cover is bucked at the top of the steel frame, a pressure transmitting plate is fixed at the upper part of the upper cover; a rotating shaft is vertically arranged at the center of the mount, penetrates through the pressure transmitting plate and is fixed with the pressure transmitting plate; a wrench is fixed at the top end of the rotating shaft; a digital display meter is embedded in the wrench; a spring bracket is fixed on the side wall of the mount; a spring guide rod is vertically fixed below the spring bracket; a liming nut sleeves the upper end of the spring guide rod; a spring sleeves the part, below the limiting nut, of the spring guide rod; a sliding block is pressed at the lower end of the spring and is arranged on the pressure transmitting plate; a first jig is connected between the upper end of the spring and the pressure transmitting plate; a first dial gauge is arranged on the first jig. The ring shear apparatus is portable, economical and practical, simple in operation, and can be used for measuring the anti-shear force of a soil sample at a constant rigidity condition and the volume change of the soil sample during shearing in the field on site.

Description

technical field [0001] The invention relates to the field of testing the characteristics of solid materials by mechanical stress, in particular to a hand-held constant stiffness ring shear instrument and a use method thereof. Background technique [0002] The ring shear instrument was developed in the 1920s, and the development of the ring shear instrument almost stopped in the following decades. It was not until the rise of residual strength research in the 1960s that the research on the ring shear instrument was revived, and then research and development There are various ring shear instruments used in indoor laboratories. [0003] At present, indoor ring shearing instruments can be divided into two types according to their structural characteristics: single-ring ring shearing instruments and double-ring ring shearing instruments. Compared with other geotechnical testing methods, these ring shear instruments have two common advantages, that is, the shear surface area can ...

AI Technical Summary

Problems solved by technology

However, with the increasing complexity and precision of the modern ring shear test system, the manufacturing cost and use cost of the ring shear instrument have gradually increased, and the daily maintenance and maintenance costs of the instrument have become increasingly expensive.

Moreover, the existing ring shear instrument is complex and bulky, and can only be used in indoor laboratories, and cannot be used in the field, and can only output constant pressure

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