Multifunctional sample box with pneumatic quick single-side unloading function

Abstract

The invention discloses a multifunctional sample box with a pneumatic quick single-side unloading function. The multifunctional sample box comprises a frame, a frame transfer trolley, a sample limiting box, supporting force transfer assemblies, sample deformation measuring assemblies and a pneumatic rapid unloading assembly, wherein the frame is arranged on the frame transfer trolley, the sample limiting box is located at the center of the frame, and six sets of the supporting force transfer assemblies are located on six wall plate faces of the frame respectively; six pressure head through holes are formed in the sample limiting box, and after pressure heads are inserted into the through holes, one of the sample deformation measuring assemblies is mounted between the two pressure heads ineach principal stress direction; the middle principal stress direction is a vertical direction; the maximum principal stress direction and the minimum principal stress direction are horizontal directions; one set of the supporting force transfer assemblies in the minimum principal stress direction is assembled with the pneumatic rapid unloading assembly, and a pressure-bearing cushion block for unloading is arranged in the supporting force transfer assembly; the pneumatic rapid unloading assembly comprises a double-acting cylinder, a force transfer frame and a buffer mechanism; the pressure-bearing cushion block for unloading is connected with the double-acting cylinder by means of the force transfer frame; and the buffer mechanism is located below the pressure-bearing cushion block for unloading.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics tests, and in particular relates to a multifunctional sample box with the function of pneumatic rapid one-sided unloading. Background technique [0002] According to the different loading methods, the true triaxial testing machine can be divided into two rigid and one flexible loading methods and three rigid loading methods. The true triaxial testing machine adopts two rigid and one flexible loading methods. The rigid loading surface of the sample is clamped by two sets of rigid pads, while the flexible loading surface of the sample is covered by sealant, and the sealant also protects the rigid pads. Blocks play a fixed role. However, for the true triaxial testing machine using the three rigid loading methods, since the sealant cannot be used, there are always unsatisfactory problems in the fixation and support between the three sets of rigid pads, and there are rigid pads during the sampl...

AI Technical Summary

Problems solved by technology

However, for the true triaxial testing machine using the three rigid loading methods, since the sealant cannot be used, there are always unsatisfactory problems in the fixation and support between the three sets of rigid pads, and there are rigid pads during the sample loading process. Risk of being jostled and flying out of the device

In addition, due to the structural instability of the three sets of rigid pads, the sensor for measuring the deformation of the sample cannot be directly fixed on the rigid pads, resulting in inaccurate measurement data

In addition, when it is necessary to study the reality of rockburst, it is necessary to drill a hole in the middle of the sample, but the supporting sample box does not have the function of deformation measurement, and it is impossible to obtain the full stress-strain curve in the true triaxial test.

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