Side-way force coefficient test system, method, water spraying device and road surface water film thickness control method

Abstract

The invention discloses a side-way force coefficient test system, method, water spraying device and road surface water film thickness control method. The side-way force coefficient test road surface water film thickness control method comprises the steps of: detecting the structure depth TD of a test road surface; running the water spraying device at a distance on the test road surface according to the 5+ / -0.5 L / s water spraying capacity and the pre-set speed, and measuring the water band width b of water sprayed on the test road surface by the water spraying device; calculating the water spraying capacity Q required by achieving the pre-set water film thickness according to a formula; and, running the water spraying device at the pre-set speed, and spraying water according to the water spraying capacity Q, so that a water film having the pre-set thickness is obtained. According to the side-way force coefficient test road surface water film thickness control method in the invention, the water film thickness and the water spraying capacity can be controlled according to the road surface structure; and influence of the water film thickness on a side-way force coefficient SFC test value can be reduced, even eliminated.

Description

technical field [0001] The invention relates to the technical field of road surface testing, in particular to a lateral force coefficient testing system and method, a water spraying device, 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...

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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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