Test method capable of simulating thermophysical parameters of soil mass under different thermal loads

Abstract

The invention discloses a test method capable of simulating thermophysical parameters of a soil mass under different thermal loads. A test device is arranged and comprises a sample preparation system and a test system, wherein the sample preparation system comprises a small compactor, a sample preparation tube, a metal rod and an external extension tube, the sample preparation tube is processed from a PVC tube and has the inner diameter being 55.0 mm, the height being 90.0 mm and the wall thickness being 3.0 mm. A test system comprises a high / low-temperature cyclic damp heat test box, a thermal probe and a KD2 Pro thermal characteristic analyzer. By the aid of the device, real simulation in different thermal load environments is realized and the thermophysical parameters of a soil mass sample are tested accurately. The method adopts a simple principle, is convenient to operate, easy to master, capable of simulating different thermal load working conditions and can bring convenience for research and application in the geotechnical engineering thermal analysis field, the test result accuracy is higher, and engineering application and mass popularization are facilitated.

Description

technical field [0001] The invention belongs to the technical field of thermal analysis and testing of geotechnical engineering, in particular to a testing method for simulating the thermal physical property parameters of soil under different thermal loads. Background technique [0002] The thermophysical parameters of the soil mainly include the thermal conductivity, specific heat capacity and thermal diffusivity of the soil, which occupy a very important position in engineering applications, such as projects requiring thermal insulation technology, closed underground buildings, heat treatment of contaminated soil , the design and placement of natural gas, oil pipelines and nuclear waste disposal equipment, the burial of cables, the foundation improvement technology for heating and cooling, the exploration and mining of natural gas, coal and oil, and the development and application of shallow geothermal energy, etc. However, in actual engineering, to obtain the thermophysic...

AI Technical Summary

Problems solved by technology

However, in actual engineering, to obtain the thermophysical properties of the soil more accurately, most of them rely on indoor thermophysical property tests (because the actual engineering environment is more complex, and the in-situ test technology has large disturbance, lag, time-consuming, and high cost)

In particular, there are few reports on indoor experiments that simulate soil thermophysical properties under different thermal environments (mainly thermal loads), because in actual engineering applications, complex and changeable thermal environments are often difficult to simulate in indoor thermal physical properties tests. One of the factors, but the impact of the difference in thermal environment on the thermophysical properties of soil cannot be ignored (relevant studies have shown that different thermal environments have a greater impact on the thermophysical properties of soil)

Images