A large-pore pavement drainage capacity test equipment and method for simulating precipitation patterns

Abstract

The invention discloses simulated rainfall pattern macro-porous pavement water drainage capacity testing equipment and a testing method. The simulated rainfall pattern macro-porous pavement water drainage capacity testing equipment comprises simulated rainfall system equipment, a test bed, a test bed supporting frame, a test piece clamp, a scale plate for measuring the rainfall height, and a drained water collecting device. The problems of actual water drainage capacity test of macro-porous water drainage asphalt pavements can be solved by quantitatively simulating different rainfall patterns, pavement cross slopes, the rainfall height and the vertical and lateral flow of water on the asphalt pavements. By adopting the testing equipment disclosed by the invention, the defects that no tilt angles can be provided, the time of test processes is limited, different rainfall patterns cannot be simulated, and the rainfall flow velocity and rainfall pressure intensity cannot be controlled when water permeability coefficients of an asphalt mixture test piece are tested by using existing testing regulations can be overcome, and the real lateral water drainage capacity and vertical water drainage capacity of the macro-porous water drainage asphalt pavements under different rainfall patterns can be fully and effectively simulated.

Description

technical field [0001] The invention belongs to the technical field of traffic and transportation highway engineering, in particular to a large-pore pavement drainage capacity test device and method for simulating precipitation. Background technique [0002] Most of the asphalt pavement is due to insufficient compaction, imperfect drainage facilities or uneven distribution of porosity and cracks, which often lead to free water immersion into the asphalt pavement structural layer. A large number of pavement damage surveys and pavement use experience show that the free water entering the interior of the pavement is an important cause of causing or accelerating pavement damage. This free water will accumulate in the pavement structure for a long time, and the vehicle will generate hydrodynamic pressure when running at high speed. , scour the structural layer, accelerate the destruction of the pavement, cause the pavement network to crack and deform, produce potholes, aggravate ...

AI Technical Summary

Problems solved by technology

[0006] The accuracy and stability of the existing water seepage test instruments are not high, and the influence of the dimensional error between the test piece and the measuring cylinder is not considered

Existing water seepage test instruments cannot accurately simulate the drainage of large-pore drainage asphalt pavement under different precipitation patterns, cannot accurately evaluate the lateral drainage of the actual road surface with different transverse slopes, and cannot control the height of water drop, flow velocity, Indicators such as flow and pressure

[0007] In the prior art, there is no lateral drainage capacity test equipment with simulated precipitation type suitable for large-pore asphalt drainage pavement

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