Shearing box as well as stress testing method and device

Abstract

The invention discloses a shearing box as well as a stress testing method and device, and relates to the field of the shearing box for stress measurement. The shearing box provided by the invention comprises a first box body, a second box body, a sliding rail assembly and a gasket, wherein the first box body is provided with a first chamber, a first sliding chute and a second sliding groove; the second box body is provided with a second chamber, a second mounting groove and a second mounting groove; the second chamber is formed in a penetrating manner and is communicated with the first chamber. The sliding rail assembly comprises first sliding pieces and second sliding pieces; the first sliding pieces are matched with the first sliding slot in a sliding manner; the second sliding pieces are matched with the second sliding slot in a sliding manner; the gasket is arranged in the second chamber and is used for covering the second chamber. The invention provides the shearing box and a stress testing device, and according to the shearing box, and the stress testing method and device provided by the invention, plastic extrusion of soil samples or soft intercalated layers along an edge ofthe shearing box under high normal pressure can be prevented so as not to cause distortion of a test result; moreover, the testing device is convenient for mounting and dismounting the test samples.

Description

technical field [0001] The invention relates to the field of shear cells for stress measurement, in particular to a shear cell, a stress test method and a device. Background technique [0002] This section is intended to provide a background or context for implementations of the invention that are set forth in the claims and detailed description. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] With the continuous development of economic construction and national defense construction, there are more and more deep rock mass projects. In deep engineering rock mass, a common weak interlayer is mainly a kind of hard soil-soft rock material, which has a wide distribution range and poor mechanical properties, and is often the main factor controlling the stability of underground engineering surrounding rock mass. [0004] The shear strength parameter of the weak interlayer is one of the main indicators to reflect its mechanical prope...

AI Technical Summary

Problems solved by technology

However, there are obvious deficiencies in this technical solution. First, the normal force is directly loaded on the upper shear box. Under high normal pressure, the friction between the upper shear box and the slide rail is increased, resulting in relatively high Large measurement error; second, during the test, small particles such as mud and sand are easily squeezed between the slide rail and the guide groove, causing the slide rail to be stuck; It is also more troublesome, and it is not convenient to improve the efficiency of the test

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