Automatic monitoring device for variable head permeability test and test method

Abstract

The invention relates to the technical field of soil permeability tests, in particular to a variable head permeability test automatic monitoring device which comprises a permeameter and a variable head pipe connected with a water inlet of the permeameter, a water inlet pipe valve is mounted at the water inlet of the permeameter, and scale marks are arranged on the variable head pipe. The device further comprises a double-shaft linear guide rail parallel to the variable water head pipe, a ball screw is installed on the double-shaft linear guide rail in parallel, an automatic capturing camera is installed on the ball screw, the top of the ball screw is connected with a stepping motor, and the stepping motor and the automatic capturing camera are electrically connected with a control computer. The water injection device is communicated with the variable water head pipe. The automatic capturing camera, the control computer and the lead screw for driving and starting the capturing camera to move are used for accurately recording and efficiently capturing water head data and test time, so that the test data are more accurate, the test operation process is simpler, and the calculation result is more reliable.

Description

technical field [0001] The invention relates to the technical field of soil infiltration tests, in particular to an automatic monitoring device and a test method for a variable water head infiltration test. Background technique [0002] Seepage damage is very common in dam projects. In order to do a good job in the reinforcement work of seepage damage, it is necessary to find out the danger and prescribe the right medicine. The first is to determine the permeability coefficient k of the soil, which is a quantitative index representing the strength of soil permeability. Different types of soil have different k values. Therefore, it is very important to accurately measure the permeability coefficient of soil. During the test, the initial water head height is generally higher than the height of the measuring personnel, so the measuring personnel need to stand on the ladder to monitor the data, which greatly increases the unsafe factor of the measurement and the line of sight n...

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Problems solved by technology

[0003] The Chinese patent document with the publication number CN209690128U discloses the method of manual reading by adding an indicator, but the braided head pipe for the variable head penetration test is generally not less than 2 meters, even if the indicator is used, it still depends on manual reading, which is unavoidable. There will be errors, and due to the influence of the height of the variable head pipe and the limitation of the height of the experimenter, manual readings still have the problems of high difficulty and low efficiency

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