Device and method for measuring water permeability coefficient of asphalt pavement

Abstract

The invention discloses a device and a method for measuring the water permeability coefficient of an asphalt pavement. The device is characterized in that a measuring cylinder is vertically arranged in the center of the top of a base provided with a hollow cavity; a quick-opening valve is arranged at the bottom of the measuring cylinder; the measuring cylinder is communicated with the hollow cavity of the base by the opened quick-opening valve; four graduated exhaust pipes which have equal diameters are vertically and evenly distributed at the periphery of the measuring cylinder; the bottom ends of the exhaust pipes pass through the top surface of the base and are communicated with the hollow cavity of the base; the pipe orifices on the tops of the exhaust pipes are higher than the liquid level of the top of the measuring cylinder; the bottom of the base is provided with a sealing leveling ring which is sealed with the ground and is capable of adjusting the base to be horizontal. The device and the method are used for measuring a water permeating system of the asphalt pavement; after the device and the method are used, the test process is simplified, the test accuracy is improved, and the consistency of test data is guaranteed.

Description

technical field [0001] The invention relates to a pavement water seepage coefficient measuring device and a measuring method thereof, more specifically to an asphalt pavement water seepage coefficient measuring device and a measuring method. Background technique [0002] The pavement water seepage coefficient is one of the key technical indicators to measure the drainage performance of the road surface. The pavement water seepage coefficient is related to the traffic safety of the road surface in rainy days and the degree of road water damage. [0003] The pavement seepage measurement in the prior art has the following problems in the process of implementing according to the specifications: [0004] 1. The detection device cannot detect roads and bridges with large slopes. On the asphalt pavement with large longitudinal and transverse slopes, due to the existence of the slope, the water seepage meter is placed on the road surface in an inclined state, so that there is an an...

AI Technical Summary

Problems solved by technology

[0004] 1. The detection device cannot detect roads and bridges with large slopes

On the asphalt pavement with large longitudinal and transverse slopes, due to the existence of the slope, the water seepage meter is placed on the road surface in an inclined state, so that there is an angle between the water surface in the water measuring cylinder and the scale of the measuring cylinder, resulting in test errors

[0005] 2. The exhaust problem of the detection device

The exhaust function of the exhaust port is difficult to grasp. If the exhaust valve is tightened too tightly, the gas cannot be discharged and the test process cannot be carried out normally; If the exhaust valve is too loose, it is likely to cause the test water to overflow through the exhaust valve, and the test will fail.

[0006] 3. The sealing problem of the detection device

When the road surface is uneven, the leakproofness between the base of the water seepage meter and the road surface cannot be guaranteed, which will also lead to unreliable test data or test failure.

[0007] 4. The installation process is complicated

During this operation, the first drop of water in the graduated cylinder to fill the cavity and the second drop of 100ml of water are both a calibrated amount, and the 100ml calibrated amount is used to estimate the gaps and asphalt that need to be filled in the entire test system. The amount of water in the gaps on the road surface is estimated to be 100ml lower as the basis for judging that the air is fully discharged. However, in the actual test process, the volume of water filled and exhausted depends on the cavity of the base and the sealing ring pressed on the base and the road surface. Due to factors such as thickness, voids on the asphalt road surface, and pore distribution, it is obvious that the volume of the water-filled air in the measuring cylinder is not always 100ml. This 100ml calibration volume causes inconsistencies in the test results under different conditions.

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