Thermostat
A volumetric instrument and temperature control technology, applied in the field of volumetric instrumentation, can solve the problems of not considering the influence of radial constraint experiment accuracy, unable to measure temperature change soil volume change, etc.
Inactive Publication Date: 2015-09-09
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0007] In view of the existing problems in the existing technology, the present invention provides a method to solve the problem that the traditional volume deformation instrument described in the technical background cannot measure the temperature change and the volume change of the soil under low temperature conditions, and does not consider the influence of radial constraints on the experimental accuracy. Problem, an experimental instrument that can accurately simulate the real situation and accurately measure the volume change of soil samples
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Embodiment Construction
[0032] refer to Figure 1-Figure 6 , illustrate the embodiment of the present invention:
[0033] A temperature-controlled rheometer of the present invention includes an outer shaft chamber 1 and an inner shaft chamber 2 . Both the outer shaft chamber 1 and the inner shaft chamber 2 are fastened on the base 3, fixed by bolts, and sealed with sealing rings.
[0034] In the base 3, five pipes whose outer ends communicate with the outside are arranged, wherein the inner ends of two pipes communicate with the outer shaft chamber 1, and the inner ends of the three pipes communicate with the inner shaft chamber 2; The pipelines communicating with the shaft chamber are designated as pipe a and pipe e, and the pipes communicating with the inner shaft chamber are designated as pipe b, pipe c and pipe d. The facilities in the outer shaft chamber 1 and the inner shaft chamber 2 and the arrangement of each pipeline in the outer shaft chamber 1 and the inner shaft chamber 2 are as follow...
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The invention provides a temperature-control volume change apparatus. The volume change apparatus comprises an outer shaft chamber and an inner shaft chamber. The outer shaft chamber and the inner shaft chamber are buckled on a pedestal. Five pipes with outer ends communicated with exterior are arranged in the pedestal, wherein the inner ends of two pipes are communicated with the outer shaft chamber, and the inner ends of three pipes are communicated with the inner shaft chamber. An inner piezometer tube is arranged at the top of the inner shaft chamber. An outer piezometer tube is arranged on the pedestal. A lug boss is formed at the central position of the pedestal. Experimental soil samples are arranged on the lug boss. Pressure difference signals of pressures of the inner shaft chamber and the outer piezometer tube are transmitted to a computer for read through a differential pressure sensor. The volume change apparatus realizes application of back pressure on soil samples through an air compressor and measurement of interior pore water pressure of soil samples through a sensor. The volume change apparatus can simulate soil sample force situation accurately under conditions of low temperature or temperature change, and can measure volume change of soil samples accurately during experimental process, which is used for study of frozen soil volume change and provides suggests for cold region foundation and subgrade engineering construction.
Description
technical field [0001] The present invention designs the field of geotechnical engineering equipment, specifically, the present invention designs a volumetric instrument for accurately measuring the volume change of frozen soil at low temperature. Background technique [0002] In recent years, with the development of science and technology, due to the huge demand for energy, minerals, fresh water and forest resources due to economic development, the vast permafrost regions rich in various resources will surely become the focus of attention. Therefore, human beings will open construction in permafrost regions more and more frequently, which will inevitably bring a lot of engineering construction in cold regions. Nowadays, many projects in my country's energy, transportation, communications, water conservancy, water supply and drainage, and oil pipelines are about to be constructed or have already been constructed in vast but complex permafrost areas. There are also some larg...
Claims
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IPC IPC(8): G01N33/24G01F23/14
Inventor 李旭赵学文田亚护刘建坤徐耀
Owner BEIJING JIAOTONG UNIV