Portable simulation water seepage performance testing instrument and use method thereof

Abstract

The invention discloses a portable simulation water seepage performance testing instrument, which comprises a base, a measuring tube, an air pressure slide block, an air pressure control device and a distance measuring module, wherein the base is used for realizing the sealing through contacting with the pavement to be tested; the measuring tube is arranged at the upper part of the base, and is connected with the base through a ventilation pipe; a ventilation switch is arranged on the ventilation pipe; the air pressure slide block is arranged inside the measuring tube and is vertical to the side wall of the measuring tube; the air pressure slide block and the side wall of the measuring tube are in a moving sealing state; the air pressure control device is arranged at the upper part of the measuring tube, and is used for controlling the air entering quantity of the upper part of the air pressure slide block in the measuring tube; the distance measuring module is used for measuring the used time and the displacement of the air pressure slide block in the measuring tube; the measuring tube is a sealed tube; an upper part air inlet is connected with the outside through an air pressure control device; a lower part air outlet is connected with outside air through the ventilation pipe. The air is used for replacing conventional water to be used as a test flow seepage carrier; the precise measurement of the water seepage performance of the large-porosity open-graded pavement can be performed.

Description

technical field [0001] The invention relates to the field of road engineering detection, in particular to a water seepage performance tester and a method for using the same. Background technique [0002] With the continuous improvement of the road construction level in our country, the quality requirements for asphalt pavement are becoming more and more stringent. 》A pavement water seepage meter is usually used to know the road compaction status by measuring the water seepage of the road surface per unit time. [0003] However, the traditional water infiltration meter will encounter residual air in the cavity of the bottom sealing ring during use, which will affect the measurement results. When the infiltration meter performs actual measurement, the water flow will first fill this part of the gap, and then penetrate into the asphalt surface. In order to eliminate the problem of large errors in measurement data caused by gas residues, most of the improved water seepage meter...

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Problems solved by technology

[0004] The above method has a good effect on the detection of pavements with a small porosity (porosity below 6%), but for open-graded pavements with a porosity of more than 18%, due to the infiltration process of the water flow through the cavity at the bottom of the permeameter Part of it has already entered the road surface and will not fill the cavity preferentially. Therefore, the overflow of water at the exhaust port cannot indicate the start time of water infiltration into the asphalt pavement. It has always been a difficult point to measure the water permeability coefficient of large voids, mainly as follows Several aspects: 1. The air in the lower part of the water permeability meter affects the test results; 2. It is difficult to determine the time when the water flow in the water permeability meter begins to penetrate into the road surface; 3. The air bubbles inside the large gap road surface affect the water seepage coefficient measurement

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