Apparatus and method for testing permeability deterioration law of sponge city permeable pavement

Abstract

The present invention discloses an apparatus and a method for testing the permeability degradation law of a sponge city permeable pavement. An upper sleeve is connected with the upper part of a lowersleeve; a rubber sleeve is arranged in the upper sleeve; a to-be-tested permeable pavement test piece is arranged in the rubber sleeve; a first test port is arranged on the sidewall of the upper sleeve, and a second test port is arranged on the sidewall of the lower sleeve; the first test port and the second test port are communicated with a pressure measuring tube; a sloping plate is arranged inthe lower sleeve; a water outlet is opened on the sidewall of the lower sleeve; the second test port is arranged above the sloping plate; the water outlet is arranged at the lowest end of the slopingplate; one end of a water outlet pipe is communicated with the water outlet, and the other end of the water outlet pipe is arranged above a filter screen; the filter screen is fixed at a top opening position of a water collection tank; and a simulated rainfall system is connected with the inlet of a nozzle through a flow meter. According to the apparatus and method provided by the present invention, permeability deterioration of permeable materials under different plugging materials and different rainfall conditions can be tested.

Description

technical field [0001] The invention belongs to the field of sponge city permeable pavement, and relates to a device and method for testing the attenuation law of permeable pavement of sponge city. Background technique [0002] Sponge city is a new concept proposed in response to the serious water environment problems in the process of rapid urbanization in my country. Permeable pavement has good permeability due to its special pore structure, which is an important measure for the construction of sponge city. widely used. Permeable pavement mainly includes permeable asphalt pavement, permeable cement concrete pavement and permeable brick pavement, which can effectively reduce or eliminate urban rainstorm and flood disasters. Therefore, the excellent permeability of permeable pavement plays a key role in reducing flood peak runoff and controlling peak shifting effects. [0003] However, permeable pavement is widely used in urban roads. Due to the large pores, it is often blo...

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Problems solved by technology

[0003] However, permeable pavement is widely used in urban roads. Due to the large pores, it is often blocked by sand, dust and foreign matter in the road environment, making it difficult to perform the function of permeable pavement, resulting in continuous decay of its permeability and long service life. shortening, increasing the possibility of urban flooding and freeze-thaw disasters

[0004] Due to the different clogging conditions and environmental conditions of different permeable pavement structures, the change of permeability attenuation law of permeable pavement is more complicated.

At present, when the traditional permeable pavement clogging test device measures the attenuation of permeability performance, it only measures the permeability coefficient of the original pavement material, and does not study the permeability decay of permeable materials under different clogging materials and different rainfall conditions.

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