Rheological direct-shear test device based on electromagnetic force

Abstract

The invention provides a rheological direct-shear test device based on an electromagnetic force. The rheological direct-shear test device based on the electromagnetic force comprises an electromagnetic force loading system which uses the electromagnetic force to apply a tangential force to a soil sample or an axial force and the tangential force to the soil sample. According to the invention, the electromagnetic force loading system applies pressure to the soil sample, essentially, the electromagnetic force generated between electromagnets is applied to the soil sample in a certain way to carry out a rheological direct-shear test on the soil sample by using electromagnet principles. Through the method, the force applied to the soil sample is controllable and adjustable, and loaded stably; and the rheological direct-shear test device based on the electromagnetic force can accurately test to obtain a shear force value applied on a critical point when the soil sample has shear deformation, and can accurately measure a relationship between a soil sample applied force and shear displacement, thereby helping to deeply study rheological properties and rules of the rheological properties to effectively improve the operability of the test and the accuracy of test data, so that the rheological direct-shear test device based on the electromagnetic force disclosed by the invention has broad application prospects in the aspect of the rheological direct-shear test on the soil sample, and is small in size, low in cost and suitable for general application.

Description

technical field [0001] The invention relates to a rheological direct shear test device, in particular to a rheological direct shear test device based on electromagnetic force. Background technique [0002] Under the influence of external force and engineering environment, most rock and soil materials have time-related mechanical behaviors. If they are subject to changes in the stress field, temperature field, or seepage field at the same time, or interact with each other, it will lead to changes in the rheological deformation path of the soil sample. Changes and deformations are accelerated, and engineering disasters, such as mudslides, landslides and landslides, will eventually occur, which will bring great harm to human production and life. It is a very important engineering application research content in the field of mechanics. However, in the current rheological direct shear test of soil samples, the rheological direct shear tester used is too large, the pressure loadin...

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Problems solved by technology

[0002] Under the influence of external force and engineering environment, most rock and soil materials have time-related mechanical behaviors. If they are subject to changes in the stress field, temperature field, or seepage field at the same time, or interact with each other, it will lead to changes in the rheological deformation path of the soil sample. Changes and deformations are accelerated, and engineering disasters, such as mudslides, landslides and landslides, will eventually occur, which will bring great harm to human production and life. It is a very important engineering application research content in the field of mechanics. However, in the current rheological direct shear test of soil samples, the rheological direct shear tester used is too large, the pressure loading value is relatively fixed, and the external influence factors during pressurization There are many shortcomings, which directly affect the accuracy of rheological direct shear test results

[0003] The existing Chinese patent with the application number "201110321240.8" discloses an intelligent geotechnical shear rheometer, which realizes the rheological test under bidirectional loading through the weight loading system, but uses the method of loading weights to affect the soil If the shear force and axial force are applied to the sample, the whole system will shake after loading, which will affect the mechanical properties of the rheological direct shear of the soil sample; moreover, the currently used weights are manufactured according to certain standards and there are certain errors in the weights themselves. , so the exact shear force value required for the critical point of shear deformation of the soil sample cannot be obtained by loading weights

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