Cubic test device and method for monitoring flow motion mechanism of karst medium

Abstract

The invention discloses a cubic test device and method for monitoring the flow motion mechanism of a karst medium. The device comprises a replenishment system, a structure-variable cubic karst mediumphysical model, a spring flow monitoring system and a pressure sensing system. The replenishment system is used to simulate different natural rainfall recharge. The cubic karst medium physical model is arranged below the replenishment system and is used for simulating a fracture network of a karst medium. A pressure sensor system is arranged in the cubic karst medium physical model and monitors water head change cases of measured points in the monitored model in real time. A data acquisition system is connected to the pressure sensor system and the spring flow monitoring system, records data in real time and stores the data in a computer. The cubic test device has a reasonable structure and maximally simulates the distribution network of a complex crack-longitudinal pipe medium 3D space inthe karst zone. The automatic data collection and air bubble elimination device effectively reduces the error. The cubic test device is suitable for research of the karst water-soluble substance migration law mechanism.

Description

technical field [0001] The invention relates to a multi-dimensional experimental device for automatic monitoring of the water flow mechanism in a karst medium structure, that is, a cracked longitudinal pipeline structure, especially the water storage and water release capabilities of different structures, and belongs to the technical field of groundwater detection. Background technique [0002] The main components of the karst system are the vertical pipeline system with high development level and the fracture network system with low development level. The two will show the phenomenon of mutual transformation between water storage medium and water release medium under different recharge methods. Therefore, it is of great significance to find out the law of water flow in karst medium and the law of water exchange between different media. At present, it has become a common method to study karst water-bearing system by physical experiment method, but most of the physical experi...

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Problems solved by technology

[0005] In order to overcome the shortcomings of existing physical test models such as single structure, weak operability, general simulation effect, flow data being greatly affected by air bubbles, and solution retention in the model after the end of a single group test, the present invention provides a three-dimensional model in XYZ The cubic physical test model that simulates the karst medium system in the plane, and the initial hydraulic gradient is set inside the model, and the outflow solution of the spring is specially treated to eliminate the influence of air bubbles on the model test data and minimize the test error

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