Device and method for homogenizing loading force of defective rock samples by using fluid cushion

Abstract

The invention relates to a device for homogenizing loading force of a defective rock sample by using a fluid cushion layer. The device for homogenizing loading force of the defective rock sample by using the fluid cushion layer comprises a cushion layer laid on a loading surface of a defective rock sample test block, wherein the loading surface of the defective rock sample test block is a scraggyloading surface, the outer surface of the cushion layer is completely attached to a convex-concave defective position of loading surface of the defective rock sample test block, a vibrating plate is arranged on the cushion layer, the whole composed of the defective rock sample test block, the cushion layer and the vibrating plate is placed on a counterforce frame, and the vibrating plate is matched with a hydraulic jack. In the cushion layer, an outer sleeve made of carbon fiber cloth is filled with bonding fillers. The device for homogenizing the loading force of the defective rock sample byusing the fluid cushion layer and the method can solve the problems that the hydraulic loading pressure uniformity deviation is large, the loading stroke of a flexible bag is small, the loading intensity is small and the like; and fluidity of the fluid cushion is used for filling the uneven stress surface of the test block, so that the load is homogenized during loading, the loading surface stressis uniform, and the accuracy of measured mechanical parameters and geotechnical test results is closer to the real value.

Description

technical field [0001] The invention relates to the field of rock sample loading tests, in particular to a device and method for using a fluid cushion to homogenize the loading force of a defective rock sample. Background technique [0002] The existing loading methods are divided into rigid non-homogenized loading and flexible homogenized loading. The rigid non-homogeneous loading device is only suitable for the test block with a flat loading surface. For the test block with a defective loading surface, it is necessary to Loading can only be achieved by cutting off the uneven part of the rock sample surface, and the loading force cannot be uniformed during loading, resulting in early failure during the loading process of the test block, large errors in the mechanical response, or errors in the measured data. However, the cutting loading method The required cost is high and the operation is complicated. In foreign countries, the material testing machines used in the laborat...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a device and method for using a fluid cushion to homogenize the loading force of defective rock samples, which can solve the problems of large deviations in hydraulic loading pressure uniformity, small loading strokes of flexible bladders, and small load strengths. For problems such as these, the fluidity of the fluid cushion is used to fill the uneven bearing surface of the test block, so that the load can be homogenized during loading, so that the stress on the loading surface is uniform and the force is uniform, so that the measured mechanical parameters and rock and soil test results can be compared. Accuracy is closer to the true value

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