A multi-functional sample box with pneumatic fast single-sided unloading function

Abstract

A multi-functional sample box with pneumatic fast one-sided unloading function, including a frame, a frame transfer trolley, a sample limit box, a supporting force transmission component, a sample deformation measurement component and a pneumatic fast unloading component; the frame is placed on the trolley , the sample limit box is located in the center of the frame, and there are six sets of supporting force transmission components, which are respectively located on the six wall panels of the frame. A sample deformation measurement assembly is installed between the two indenters in each principal stress direction; the intermediate principal stress direction is the vertical direction, the maximum and minimum principal stress directions are horizontal directions, and a set of The support force transmission component is assembled with the pneumatic quick unloading component. The support force transmission component includes a pressure pad for unloading. The pneumatic quick unloading component includes a double-acting cylinder, a force transmission frame and a buffer mechanism. The pressure pad for unloading passes through the transmission The force frame is connected with the double-acting cylinder, and the buffer mechanism is located under the pressure pad 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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