Device for testing thermophysical parameters of soil mass sample

Abstract

The invention discloses a device for testing thermophysical parameters of a soil mass sample. The device comprises a sample preparation system and a testing system, wherein the sample preparation system is used for completing preparation of the soil mass sample, and the testing system is used for completing the testing on the thermophysical parameters of the soil mass sample under different thermal loads; the sample preparation system comprises a mini-type compacting device, a metal bar, a sample preparation tube and an external extension tube, and the mini-type compacting device is formed by a base and a compacting hammer; the testing system is formed by high / low temperature alternating humidity-temperature test chamber, a thermal probe and a KD2 Pro thermal characteristic analyzer, and a stainless steel support is arranged at the inner part of the high / low temperature alternating humidity-temperature test chamber and is used for placement of the sample preparation tube filled with the soil mass sample. Actual simulation under different thermal load environments is realized through the device, and the thermophysical parameters of the soil mass sample are accurately tested. According to the device disclosed by the invention, the structure is simple, the operation is convenient, the precision of a testing result is higher, convenience can be provided for research and application of a geotechnical engineering thermoanalysis field, and engineering application and large-scale promotion are facilitated.

Description

technical field [0001] The invention belongs to the technical field of thermal analysis and testing of geotechnical engineering, and in particular relates to a device for testing thermophysical parameters of soil samples. 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 thermophysical properties of soil more accuratel...

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