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Device and method for approximate simulation of particle transport and permeable pavement blockage under runoff action

A technology of permeable pavement and simulation device, applied in the field of civil engineering, can solve the problems of shortened service life, blocked pores, and difficulty in exerting the drainage function of permeable pavement, and achieves the effect of optimized design

Active Publication Date: 2014-12-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of suspended particles (such as silt, debris, etc.) contained in the surface runoff generated by rainfall, these mineral or organic fine particles will continue to enter the pores of the permeable pavement with the water flow, causing the pores to be blocked and the permeability of the permeable concrete to decrease continuously, resulting in It is difficult for permeable pavement to perform its drainage function, and eventually it evolves into a non-permeable pavement, which shortens its service life and increases the possibility of urban flooding and freeze-thaw disasters
However, there are few related studies on the transport of particles under the action of stormwater runoff and the clogging of particles in the pores of permeable pavement. Therefore, it is necessary to conduct more in-depth research on this complex solid-liquid two-phase flow phenomenon.

Method used

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  • Device and method for approximate simulation of particle transport and permeable pavement blockage under runoff action
  • Device and method for approximate simulation of particle transport and permeable pavement blockage under runoff action
  • Device and method for approximate simulation of particle transport and permeable pavement blockage under runoff action

Examples

Experimental program
Comparison scheme
Effect test

specific example 1

[0051] In this test, four groups of inflow flows (Q) were selected to test the influence of inflow flows on particle transport and permeable pavement blockage, respectively: 3.20L / min, 4.50L / min, 6.00L / min, and 6.80L / min , the slope is fixed at 0.0105, the infiltration flow rate (Q 1 ) is 5% of the inflow flow, and the particle size is 630-800m.

[0052] t=0s indicates that the particles have just started reaching the collection device. The particles collected in the device are the particles added to the water flow through the adding device, and these particles are not blocked in the pores of the permeable pavement but are carried out of the water tank by the runoff. The influence of inflow flow rate on the quality of particles collected by the collection device is as follows: Figure 4 shown. Weighing results show that most of the particles will be transported to the end of the tank under a large inflow flow, while a small part of the particles will be blocked in the perme...

specific example 2

[0054] Four groups of slopes (S 0 ) to test the influence of road surface slope on particle transport and permeable pavement blockage, respectively: 0.0035, 0.0105, 0.0175 and 0.0244, the inflow flow rate (Q) was fixed at 6.00L / min, the infiltration flow rate (Q 1 ) is 5% of the inflow flow, and the particle size is 630-800m.

[0055] The influence of road slope on the quality of particles collected by the collection device is as follows: Figure 6 As shown, the single-width transport rate of particles with different road slopes is as Figure 7 shown. Both figures show that more particles can be transported to the end of the pavement at larger pavement slopes, i.e., fewer particles will be clogged in the pores of the permeable pavement, and the single-width transport rate of the particles in the runoff will be greater.

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Abstract

The invention discloses a device and a method for approximate simulation of particle transport and permeable pavement blockage under the runoff action. The device comprises a water channel, a support capable of adjusting slope of a permeable pavement model is arranged at the bottom of the water tank, the permeable pavement model is arranged in the water channel, devices used for reducing water flow state change to cause eddies and bubbles are arranged at the head and the tail of the permeable pavement level, and each device is composed of a straw array. A water tank I of a constant water head and a water tank II are arranged at the head and the tail of the water channel respectively, a particle collection device is arranged in the water tank II and disposed on an electronic balance, and a particle adding device is arranged in the upper stream of the permeable pavement. Influences on particle transport and hole blockage due to parameters such as inflow amount, infiltration flow, slope and sediment grain size are analyzed through an experiment and numerical simulation method. Research results provide a solid foundation for optimal permeable pavement design.

Description

technical field [0001] The invention relates to the determination of an approximate simulation device and method for particle transport and permeable pavement blockage under the action of runoff, and belongs to the field of civil engineering. Background technique [0002] Permeable pavement is also called porous pavement, including permeable concrete pavement and OGFC (open graded anti-skid wear layer) asphalt pavement. A large amount of rainwater seeps into the ground, thereby effectively reducing or eliminating urban storm flood disasters. However, due to the large amount of suspended particles (such as silt, debris, etc.) contained in the surface runoff generated by rainfall, these mineral or organic fine particles will continue to enter the pores of the permeable pavement with the water flow, causing the pores to be blocked and the permeability of the permeable concrete to decrease continuously. It is difficult for permeable pavement to perform its drainage function, an...

Claims

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Application Information

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IPC IPC(8): G01M10/00G01N5/00
Inventor 张炯崔新壮黄丹侯飞汤潍泽
Owner SHANDONG UNIV
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