Method and special device for researching rapid rainwater infiltration law of different water permeable paving materials during rainfall

Abstract

The invention relates to a method and a special device for researching a rapid rainwater infiltration law of different water permeable paving materials during rainfall. The method is characterized by comprising the following steps of: 1, packing a column according to parameters such as structure and thickness of each layer of a pavement type to be researched, wherein the final success of a test is directly influenced by the packing quality of the column; 2, reconstructing a rainfall surface of an artificial rainfall device according to the shape of an underlying surface of the packed column and checking the sealing property of a rubber plug on a rainfall bottom plate; and 3, fitting relation between the water level of a supercharging column of the artificial rainfall device and rainfall strength. The method and the special device are applicable to scientific research; according to the method, artificial rainfall, runoff generation and infiltration are combined, and rainfall production under various conditions and a dissipation law are considered; the device has the advantages that: the capital consumption is low, and the operation is easy; an in-situ condition can be simulated to the greatest extent; the influence of weather conditions can be avoided; rainfall can be performed at a fixed time; and the runoff generation and runoff conditions of the underlying surface are researched.

Description

technical field [0001] The invention belongs to a measurement technology, specifically a method of artificial rainfall to study the runoff and infiltration laws of soils with different properties and underlying surfaces with different structures under different rain intensities, combined with models and outdoor in-situ tests Analyze the runoff and infiltration laws of various regions under natural conditions, and the methods and special devices for rational use of rainwater. Background technique [0002] This measurement technology is to adjust the rain intensity of the artificial rainfall device through an external Martens bottle (that is, the rain intensity adjustment device), so that the rainfall intensity of the artificial rainfall device can reach a large range of variation. The indoor measured rainfall intensity can vary from 30mm / h to 250mm / h. This range of variation can basically cover the one-hour rainfall intensity with return periods ranging from 2 to 100 years ...

AI Technical Summary

Problems solved by technology

[0003] A. When connecting the rain intensity adjustment device and the water supply device, if the rain intensity adjustment device is not filled with water, or the connection between the rain intensity adjustment device and the water supply device is not completely sealed, a vacuum will be formed in the water supply device during the test, resulting in The water supply is not smooth

[0004] B. The rainfall device uses a rubber plug with a needle inserted in the middle to form a rainfall surface. Since the rubber plug will age after long-term use, some rubber plugs will leak after the device is used for a long time

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