Thermal consolidation tester for internal heating of saturated soil and test method thereof

Abstract

The invention provides a thermal consolidation tester for internal heating of saturated soil and a test method thereof. The thermal consolidation tester comprises a modified triaxial pressure chamber,a sample barrel which can realize internal heating, a temperature controller and an ultrasonic processor, wherein the sample barrel is wrapped by a layer of a rubber film; a small heating particle isembedded in sample soil and is connected with a temperature sensor mounted on the upper part of the top cover of the pressure chamber through a thin wire which has passed through water permeable stone and a sample cap; two arc heating plates symmetrically wrap the inner sides of the side wall of the pressure chamber, and space between the two arc heating plates and the inner sides is filled withheat-insulating asbestos; one end of the temperature sensor passes through a pressure chamber barrel, and the other end of the temperature sensor is connected with the temperature controller through awire; and the ultrasonic processor is composed of an ultrasonic transmitting device, an ultrasonic receiving device and an ultrasonic processing device arranged at two sides of the side wall of the pressure chamber. The test method can quickly heat soil, realizes uniform external heating temperature of the soil and heating of interior local parts of soil, and analyzes the influence of ambient temperature on the displacement and temperature of the soil.

Description

technical field [0001] The invention relates to a temperature-related test of saturated soil, in particular a thermal consolidation test of internal heating of different saturated soils, and belongs to the technical field of geotechnical tests. Background technique [0002] The research on the mechanical properties of temperature on the isotropic medium of rock and soil has always been a hot topic in the field of geotechnical engineering. The diffusion and conduction of thermal energy in rock and soil and its influence on soil deformation and strength have attracted the attention and attention of various scholars in the field of rock and soil. The storage and development of geothermal sources, the disposal of high-level radioactive nuclear waste, the burial of underground heating pipes, and the deformation and stability of soil caused by seasonal temperature differences between day and night have all become important research directions. Therefore, it is particularly import...

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Problems solved by technology

Because the liquid is heated indirectly through the outer cover, the sample is heated evenly, but the disadvantage is that it takes a long time to reach the target temperature

[0006] It can be seen that the three types of heating methods have some shortcomings. For the study of the influence of deep soil-heat source on the soil, the effect of its temperature on the surrounding environment is also local, and the temperature will also show different changes due to the distance from the heat source. , so it is more reasonable to use the indoor heating mode for experimental research in this direction. In addition, a method of direct heating inside the soil is proposed here, so that the temperature at a certain point inside the soil is more similar to the effect of a heat source on the soil.

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