Distributed soil heat conductivity coefficient testing system and testing method thereof
A technology of thermal conductivity and testing method, which is applied in the field of distributed soil thermal conductivity testing method and its testing system, can solve the problem of obtaining distributed thermal conductivity which has not been proposed, it is difficult to meet the assumption conditions of the hot wire method, and it is difficult to satisfy the thermal conductivity Computing requirements and other issues to achieve the effect of high test efficiency, diversified functions, and long test distance
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Embodiment 1
[0077] Take a specific embodiment as an example below to illustrate the specific implementation process and test effect of the present invention, and the installation of the test system is referred to figure 1 .
[0078] Step S1, burying the composite optical cable 1 in the soil body 6 to be tested;
[0079] The composite optical cable 1 is respectively connected with the optical signal processing control module 2 and the heating control module 3 to form an optical path and a heating circuit, and the connectivity of the optical path and the heating circuit is tested respectively.
[0080] Step S20, using the optical signal processing control module to collect the initial temperature of the soil to be measured, the collection interval is 0.5min, and the collection time t1≥30min; determine the standard deviation σ of the initial temperature, if the standard deviation σ>0.5 °C, repeat the step S20; if the standard deviation σ≤0.5 °C, store the initial temperature, and execute st...
Embodiment 2
[0096] like Figure 5-6 As shown, take the vertical test embodiment in a specific borehole as an example to illustrate the specific implementation process and test effect of the present invention. The depth of drilling is 95m, and the radius of the borehole is 153mm. The borehole is backfilled with fine sand, and the coupling time is longer than 6 months.
[0097] Step S1, burying the composite optical cable 1 in the soil body 6 to be tested by drilling, the composite optical cable 1 is arranged in a U shape on the wall of the transduction tube 5, which includes a sinking section 11 and a section opposite to the sinking section. The return section 12, the interval between the sinking section and the return section is 3-5cm, and the heating power q per unit length is twice the heating power per unit length of a single composite optical cable. The inner diameter of the transducer tube is 30mm, and the outer diameter is 32mm. It is arranged in the center of the borehole in a dou...
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