Isolating type triaxial test device

Abstract

The invention disclose an isolating type triaxial test device, and relates to a device for carrying out mechanical property tests on rock and concrete materials in a pressure state. According to the main structure of the device, the upper portion and the lower portion of a pressure chamber are connected with an upper penetrating cover and a lower penetrating cover respectively to form an overall space, a lower pressing head, a sample and an upper pressing head are sequentially arranged along the center line of the overall space from bottom to top, and the lower pressing head is sleeved with an elastic cushion and isolated from the inner wall of the pressure chamber through an isolating sleeve; hydraulic oil is injected into the space formed by the pressure chamber and the isolating sleeve through the pressurizing device; a strain gage attached to the side face of the sample is connected with a strain gauge to test strain; a press applies test axial pressure to the sample through the upper pressing head. According to the device, pressure oil is located in an airtight space, repeated oil charge or drainage is not needed, and the sample does not need to be wrapped. Due to the fact that the device is simple in structure, small in size and light, operation is easy and convenient, and working efficiency is greatly improved.

Description

technical field [0001] The invention relates to a device for testing the mechanical properties of rock and concrete materials under pressure, in particular to an isolated triaxial test device. Background technique [0002] The real stress state of rock and concrete materials in nature and engineering and the mechanical properties in this state are important indicators of geotechnical engineering design; the main method to obtain this indicator is to apply a certain lateral pressure to the sample Carry out a compressive strength test, that is, a professionally called triaxial compressive strength test. The usual practice of the triaxial compression test is to place the sample in a pressure chamber, pressurize the hydraulic oil in the pressure chamber, form a lateral pressure on the sample, and then apply an axial force to test its mechanical properties. In the test device with a known structure, the sample is placed in a pressure chamber filled with hydraulic oil, and the sa...

AI Technical Summary

Problems solved by technology

The test device with this structure has three major deficiencies: first, oil must be filled and drained for each test; second, the sample needs to be tightly wrapped and not necessarily effective; third, the test device is large in size and heavy in weight

Therefore, cumbersome and time-consuming operations and low efficiency are the inherent weaknesses of this structure

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