Roadbed soil temperature and humidity monitoring experiment device with controllable dry and wet threshold value and experiment method

Abstract

The invention discloses a roadbed soil temperature and humidity monitoring experiment device with a controllable dry and wet threshold. The device comprises an experiment tank device and a temperatureand humidity monitoring device, wherein the experiment tank device comprises a tank with a water permeable pore plate at the bottom, and a water permeable gauze layer and a water permeable stone layer are respectively arranged above and below the water permeable pore plate; a water pump is connected to the exterior of the tank body, and a water outlet of the water pump is communicated with the permeable stone layer. Aiming at the problems and defects in the prior art, the invention provides the monitoring device which can automatically monitor the dry-wet cycle process of roadbed soil and perform specific quantitative operation on the dry-wet threshold value of the roadbed soil. And changes of a temperature field and a humidity field in the soil body and in the vertical direction in the dry-wet cycle process can be dynamically monitored and measured.

Description

technical field [0001] The invention relates to a roadbed soil temperature and humidity monitoring experimental device and an experimental method with controllable dry and wet thresholds, belonging to the technical field of roadbed and pavement engineering. Background technique [0002] The subgrade is the main engineering structure of the road. Most road diseases are related to water. The water content of the subgrade soil has a great influence on its strength and stability, and is the main factor affecting the nature of the subgrade engineering. Among them, the dry-wet cycle of the moisture inside the subgrade soil is one of the main external factors affecting the stability of the subgrade. [0003] In the traditional experimental device, the subgrade soil is replenished and evaporated manually. The dry-wet threshold cannot be accurately quantified, and the exact time of operation cannot be controlled, which is not conducive to the accurate simulation of the dry-wet cycle...

AI Technical Summary

Problems solved by technology

The dry-wet threshold cannot be accurately quantified, and the exact time of operation cannot be controlled, which is not conducive to the accurate simulation of the dry-wet cycle process of subgrade soil and the summary of subsequent experimental rules

[0004] For the experimental method of using a single-chip computer to connect temperature and humidity sensors, when the spatial distance between the sensors is relatively close, there will often be mutual interference between the sensors, which will affect the accuracy of the readings and the reliability of the data.

The traditional method of using a delay circuit to disconnect the positive and negative poles of the sensor interface has poor reading stability, and when a single sensor fails to read, it is impossible to quickly and intuitively find the corresponding faulty sensor

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