A microwave heating triaxial test device and heating method

Abstract

The invention discloses a microwave heating triaxial test device and a sample heating method, comprising a novel triaxial pressure chamber, a microwave heating device, a temperature controller, a microwave modem, a cylindrical heating cylinder attached to the inner wall of the pressure chamber cylinder, and a pressure chamber cylinder The middle of the body and the cylindrical heating cylinder is filled with glass fiber. The cylinder body of the pressure chamber, the glass fiber and the cylindrical heating cylinder are a lift-type integrated structure, which does not need to be disassembled and is easy to operate. A microwave heating device is embedded in the sample cap on the upper part of the pressure chamber. The microwave signal processor is connected, the microwave signal processor is connected with the microwave modem through the wire, the microwave modem is connected with the temperature sensor through the wire, and the temperature sensor is connected with the inside of the pressure chamber and the upper part of the sample through the wire to form a closed loop. The invention can realize the direct overall heating of the sample itself, make the internal and external temperatures of the sample consistent, avoid the influence of uneven heating on the test results, and ensure the accuracy of the triaxial test results.

Description

technical field [0001] The invention belongs to the technical field of geotechnical testing, and relates to a heating device and a heating method, in particular to a microwave heating triaxial test device and a heating method capable of ensuring rapid temperature rise and overall uniform heating of a triaxial sample. Background technique [0002] The study of temperature on the mechanical properties of rock-soil isotropic media has always been a hot topic in the field of geotechnical engineering. The influence of temperature on the mechanical properties of soil has also attracted the attention of many scholars. In heat exchange pile engineering, due to the friction between the pile and the soil during the heat exchange process, the temperature of the soil around the pile rises. Due to the rise in the temperature of the soil around the pile, its mechanical properties may change, and further affect the stiffness of the pile-soil interface And load transfer, if this problem is...

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Problems solved by technology

[0004] At present, none of the heating methods in the domestic triaxial test can meet the requirement of simultaneous heating of the inside and outside of the sample; there is no domestic triaxial experimental instrument that can make the inside and outside of the sample evenly heated

For the study of deep soil, due to the influence of the heat generated by pile friction on the soil, the temperature has a local effect on the surrounding environment, and the temperature will also show different changes due to the cross-sectional area of ​​the pile and the pile pulling speed. Make the temperature inside and outside the soil reach the expected result

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