A temperature and humidity sensor protection device buried in gravel soil roadbed and its usage

Abstract

The invention discloses a protection device for a temperature and humidity sensor buried in a gravel soil roadbed and its usage, comprising a protection case for containing the temperature and humidity sensor and an insulated metal wire fixed on the protection case; A number of ventilation holes are evenly opened, and one end of the protective shell is threaded with a top cover; the insulated metal wires are arranged in a U shape, the bottom of the insulated metal wires is bypassed and fixed on the protective shell, and both ends are drawn out horizontally to the subgrade outside. The invention makes the embedding process of the temperature and humidity sensor controllable, makes the probe of the temperature and humidity sensor contact with fine-grained soil, improves the contact degree between the probe of the temperature and humidity sensor and gravel soil, and ensures the measurement accuracy of temperature and humidity. The invention solves the problem that the sensor buried in the coarse-grained soil may be disturbed, which may cause the sensor to shift and the problem of later positioning difficulty by testing the resistance of the metal wire. The invention solves the problem that the sensor is easy to be crushed and damaged by crushed stones on the soil filling roadbed containing crushed stones.

Description

technical field [0001] The invention relates to the technical field of engineering monitoring, in particular to a temperature and humidity sensor protection device buried in gravel soil roadbed and its usage. Background technique [0002] The survey shows that the distribution area of ​​middle and deep seasonal frozen soil (>1m) in my country accounts for about 1 / 3 of the national land area. Frost damage to roadbeds in permafrost regions has long been a prominent problem in road construction and safe operation in northern and western my country, in which moisture migration and temperature changes in roadbeds are important causes of roadbed frost heave. Therefore, in highway engineering in northern my country, it is very necessary to use temperature / humidity sensors to monitor changes in moisture and temperature in the roadbed. In addition, in many areas in northern my country, on-site gravel filling is mostly used for roadbed filling, and the existing temperature / humidit...

AI Technical Summary

Problems solved by technology

When the temperature / humidity sensor is buried in the coarse-grained soil and rock for measurement, the sensor probe cannot fully contact the soil due to the large soil particles, resulting in wrong test results

[0011] 2) Embed sensors in gravel-filled soil subgrades. Due to the large particle size of gravel, boulders, and flakes in the subgrade, with sharp edges and corners, the sensors are easily crushed and damaged under the conditions of on-site construction and rolling.

[0012] 3) The construction process of subgrade filling Due to factors such as embankment filling and slope cutting during the construction process, the outer edge of the slope toe has been dynamically adjusted, and the sensor is often buried during the construction stage. It is difficult to accurately locate the exact position of the sensor when the construction is completed.

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