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Rainstorm-resistant waterlogging-resistant recycled pervious concrete pavement design method

A technology of permeable concrete and concrete pavement, which is applied in applications, household appliances, special data processing applications, etc., and can solve problems such as poor water permeability, inability to accurately control the porosity of permeable concrete, and inability of permeable roads to meet waterlogging requirements, etc.

Active Publication Date: 2020-10-30
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A lot of research has been carried out on the water permeability of permeable concrete and the application of urban rainwater management at home and abroad. However, the porosity of traditional permeable concrete cannot be accurately controlled, the water permeability is poor, and there is a contradiction between water permeability and strength. The permeable roads cannot meet the waterlogging requirements. At present, there are few studies on the design of permeable concrete for different levels of rainstorms.

Method used

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  • Rainstorm-resistant waterlogging-resistant recycled pervious concrete pavement design method
  • Rainstorm-resistant waterlogging-resistant recycled pervious concrete pavement design method
  • Rainstorm-resistant waterlogging-resistant recycled pervious concrete pavement design method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Step 1. Divide the cumulative rainfall within 24 hours of the heavy rain condition by dividing the drainage time of this working condition, and the precipitation speed range of the heavy rain is 0.03-0.06mm / s; according to the precipitation speed range, the permeability coefficient of the heavy rainstorm is selected as the anti-storm level is 0.5mm / s; according to the relational formula (1) between water permeability coefficient and porosity, it is determined that the optimum porosity range for different rainstorm levels is 0.09-0.1%.

[0049] Step 2. A new type of anti-storm and waterlogging recycled permeable concrete pavement. According to the drainage requirements of the storm, the aperture is selected as 0.7mm, and 25 permeable holes are evenly arranged on every 1 square decimeter. The arrangement is 5×5, and the porosity is 0.096. %.

[0050] Step 3. Determine the strength grade of the new recycled permeable concrete to be 55MPa. According to the design strength g...

Embodiment 2

[0054] Step 1. Divide the cumulative rainfall within 24 hours of the heavy rain condition by dividing the drainage time of this working condition, and the precipitation speed range of the heavy rain is 0.03-0.06mm / s; according to the precipitation speed range, the permeability coefficient of the heavy rainstorm is selected as the anti-storm level is 0.5mm / s; according to the relational formula (1) between water permeability coefficient and porosity, it is determined that the optimum porosity range for different rainstorm levels is 0.09-0.1%.

[0055] Step 2. A new type of anti-storm waterlogging regeneration permeable concrete pavement. According to the drainage requirements of the rainstorm, the aperture is selected as 1mm, and 12 permeable holes are evenly arranged on every 1 square decimeter. The arrangement is 3×4, and the porosity is 0.094%. .

[0056] Step 3. Determine the strength grade of the new recycled permeable concrete to be 55MPa. According to the design strength...

Embodiment 3

[0060] Step 1. Divide the accumulated rainfall within 24 hours of the heavy rainstorm by dividing the drainage time of this working condition, and the precipitation speed range of the heavy rainstorm is 0.03-0.14mm / s; according to the precipitation speed range, the water permeability coefficient of the heavy rainstorm is selected as 0.5mm / s; according to the relational formula (1) between hydraulic permeability coefficient and porosity, it is determined that the optimum porosity range for different rainstorm levels is 0.1-0.11%.

[0061] Step 2. A new type of anti-storm and waterlogging recycled permeable concrete pavement. According to the drainage requirements of heavy rain, for heavy rain, the aperture is selected as 0.8mm, and 20 permeable holes are evenly arranged on every 1 square decimeter. The rate is 0.100%.

[0062] Step 3. Determine the strength grade of the new recycled permeable concrete to be 60MPa. According to the design strength grade and formula (4), the wate...

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Abstract

The invention relates to a rainstorm-resistant waterlogging-resistant recycled pervious concrete pavement design method which is characterized by comprising the following steps: S01, determining a permeability coefficient K of a concrete pavement when a set drainage standard is reached; S02, obtaining a relational expression I between the concrete porosity P and the permeable system K, and determining the porosity P corresponding to the permeable coefficient K in the step S01 according to the relational expression I; S03, obtaining a relational expression II between the concrete strength and the porosity P, and determining the concrete strength according to the relational expression II; S04, designing water permeable holes in the concrete pavement according to a relational expression III between the porosity P and the water permeable holes, wherein the water permeable hole design comprises hole diameter and hole distribution design of the water permeable holes; and S05, designing the mix proportion of the concrete according to the concrete strength determined in the step S03. According to the method, the porosity and the mix proportion of the pervious concrete can be designed according to the rainstorm grade and the flood drainage requirement needing to be met by the pavement.

Description

technical field [0001] The invention relates to a method for designing a concrete pavement, in particular to a method for designing a regenerated permeable concrete pavement against heavy rain and waterlogging. Background technique [0002] Urban waterlogging has swept across the world, seriously threatening the normal operation of cities and people's daily life. In order to reduce the occurrence of urban rainstorm and waterlogging disasters and improve ecosystem functions, a global upsurge in the construction of "sponge cities" has been set off. Paving permeable concrete pavement can quickly infiltrate rainstorm runoff, effectively manage urban rainwater, and reduce the probability of rainstorm and waterlogging disasters. It has a good application prospect and has attracted extensive attention in the field of municipal engineering. [0003] At home and abroad, a lot of research has been carried out on the water permeability of permeable concrete and the application of urba...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/00G06F30/13C04B111/20C04B111/52
CPCC04B28/04G06F30/13C04B2111/00284C04B2111/0075C04B2111/00991C04B2111/20C04B2111/52C04B2201/50C04B2201/52C04B18/08C04B18/146C04B14/48C04B14/06C04B18/16C04B2103/302C04B38/0003C04B38/0074
Inventor 朱平华牛志刚陈春红刘惠王新杰封金财
Owner CHANGZHOU UNIV
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