Microwave heating triaxial test device and heating method

Abstract

The invention discloses a microwave heating triaxial test device and a sample heating method. The device comprises a novel triaxial pressure chamber, a microwave heating device, a temperature controller and a microwave modem, wherein a columnar heating cylinder is attached to the inner wall of a pressure chamber cylinder, the space between the pressure chamber cylinder and the columnar heating cylinder is filled with glass fibers, and the pressure chamber cylinder, the glass fibers and the columnar heating cylinder form a lifting integrated structure, so that disassembling is not needed, and operation is easy; and the microwave heating device is embedded into a sample cap on the upper portion of the pressure chamber, the microwave device is connected with a microwave signal processor through a wire, the microwave signal processor is connected with the microwave modem through a wire, the microwave modem is connected with a temperature sensor through a wire, and the temperature sensor isconnected to the interior of the pressure chamber and the upper portion of a sample through wires, so that a closed loop is formed. Through the device and the method, direct overall heating of the sample itself can be realized, internal temperature and external temperature of the sample are consistent, the influence of non-uniform heating on a test result is avoided, and the accuracy of the triaxial test result is ensured.

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...

AI Technical Summary

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

Images