Lateral Force Coefficient Test Method and Road Surface Water Film Thickness Control Method

Abstract

The invention discloses a lateral force coefficient testing system and method, a water spraying device, and a method for controlling the thickness of a road surface water film. The above-mentioned method for controlling the thickness of the water film on the road surface of the lateral force coefficient test includes the following steps: detecting the construction depth TD of the test road surface; using the water spray device in the test according to the water spray volume of 5±0.5L / s and the preset speed Drive a certain distance on the road surface, measure the water belt width b left by the water sprayed by the water spray device on the test road surface; calculate the water spray quantity Q required to reach the preset water film thickness according to the formula; use the water spray The device travels at the preset speed and sprays water according to the spray quantity Q to obtain a water film with a preset thickness. The road surface water film thickness control method for lateral force coefficient test of the present invention can control the water film thickness and water spray volume according to the pavement structure, and reduce or even eliminate the influence of the water film thickness on the test value of the lateral force coefficient SFC.

Description

technical field [0001] The invention relates to the technical field of road surface testing, in particular to a method for testing a lateral force coefficient and a method for controlling the thickness of a water film on a road surface. Background technique [0002] For the determination of the road surface lateral force coefficient SFC value, the lateral force coefficient test system introduced in our country's standard system is the British SCRIM system. The method has been incorporated into the specification, and its application has become more common in recent years. Both the SCRIM system and the Mu-meter system require artificial watering in front of the test wheels during the test to make the road surface wet, thereby simulating the most unfavorable driving state in rainy days. The thickness of the water film has put forward certain requirements. In the actual application process, after a large number of comparative tests, we found that the amount of water sprayed in...

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Problems solved by technology

However, whether it is the way of pressurized water spray or artesian water, the control of the water spray volume is relatively random. The volume of pressurized water will be affected by the power of the water pump, and the volume of artesian water will be affected by the water level of the waterwheel. The influence of water film thickness on the road surface cannot be controlled, and the amount of water sprinkling cannot be strictly controlled, and the influence of water film thickness on the test value of the lateral force coefficient SFC cannot be eliminated.

[0004] In addition, the pavement structure depth of different structure types is different, and the same amount of water is sprayed on the pavement with different structure depths, and the thickness of the water film formed is not the same. The control has not been treated differently, which also causes the thickness of the water film to be uncontrollable

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