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Pervious concrete inverted filter layer for dam-toe revetment, preparation method thereof and revetment structure

A technology of permeable concrete and reverse filter layer, which is applied in the fields of permeable concrete reverse filter layer, slope protection structure, and preparation. It can solve problems such as low reliability, poor drainage and decompression effect, unreasonable design of reverse filter layer structure, etc., and achieve integrity Good, improves durability and reliability, and maintains long-term use characteristics

Inactive Publication Date: 2018-11-27
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a frost-resistant permeable concrete filter layer for slope protection behind the dam, the main purpose of which is to solve the unreasonable design of the filter layer structure, low reliability and drainage and decompression The problem of poor performance

Method used

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  • Pervious concrete inverted filter layer for dam-toe revetment, preparation method thereof and revetment structure
  • Pervious concrete inverted filter layer for dam-toe revetment, preparation method thereof and revetment structure
  • Pervious concrete inverted filter layer for dam-toe revetment, preparation method thereof and revetment structure

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Embodiment 1

[0032] Such as Figure 1-Figure 3 As shown, a anti-freezing permeable concrete filter layer used for slope protection behind the dam, which is sequentially arranged with a geotextile layer 2, a fine aggregate permeable concrete layer 3 and a coarse aggregate permeable concrete layer along the flow direction of the permeable water in the dam body 4.

[0033] The geotextile selected in the embodiment of the present invention has a certain toughness and strength, and it should be ensured that during the construction process, it will not be torn or punctured due to laying or vibrating concrete, and the lap joints of the geotextile are glued or stitched. The method forms an integral structure, the thickness of the geotextile is between 1.5-5mm, and the equivalent diameter is less than 0.075mm.

[0034] The permeable concrete layer selected in the embodiment of the present invention is constructed in a cast-in-place manner, and its integrity is stronger.

[0035] The fine aggregat...

Embodiment 2

[0039] A construction method of antifreeze permeable concrete filter layer for slope protection behind a dam, comprising the following steps:

[0040] 1) Repair the downstream dam slope of the earth-rock dam to make it as smooth as possible;

[0041] 2) Spread the geotextile flatly on the construction site. The laying should be smooth, moderately tight, and should be in contact with the soil surface. The lap width should be greater than 50cm and bonded or stitched;

[0042] 3) Fix the geotextile at the top and bottom with anti-skid nails, and it should be pressed along with the laying;

[0043] 4) The fine aggregate permeable concrete layer and the coarse aggregate permeable concrete layer adopt the method of layered pouring; after the fine aggregate permeable concrete is mixed, it is poured on the geotextile as evenly as possible, and the surface is vibrated by plane vibration. Smooth and strictly control its thickness, and pour the coarse aggregate permeable concrete layer ...

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Abstract

The invention discloses a pervious concrete inverted filter layer for a dam-toe revetment, a preparation method thereof and a revetment structure, and relates to the technical field of water conservancy projects. The pervious concrete inverted filter layer is sequentially provided with a geotextile layer, a fine aggregate pervious concrete layer and a coarse aggregate pervious concrete layer alongthe permeate water flowing direction in a dam, wherein the thickness of the geotextile layer is 1.5-5mm; the fine aggregate pervious concrete layer comprises cement, stones, sands, water, a water reducer, an enhancer, an air entraining agent and fine fibers, and has a thickness of 2-6cm; the coarse aggregate pervious concrete layer comprises cement, stones, sands, water, a water reducer, an enhancer, an air entraining agent, fine fibers and coarse fibers, and has a thickness of 6-15cm. The inverted filter layer has good integrity, good water permeability, strong freezing resistance, relatively good durability and relatively good reliability.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a permeable concrete reverse filter layer used for slope protection behind a dam, a preparation method and a slope protection structure. Background technique [0002] The reverse filter layer is made of 2 to 4 layers of materials such as sand, gravel or pebbles with different particle sizes, and the particles gradually increase along the direction of water flow. The particles in any layer are not allowed to pass through the pores of the adjacent thicker layer, and the particles in the same layer cannot move relative to each other. The function of the reverse filter layer is to filter the soil for drainage. It is required to prevent the protected soil of the dam body or dam foundation from being precipitated with the seepage water, and ensure the smooth discharge of the seepage water, so that the seepage energy in the dam body and the dam foundation can be re...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B28/00E02B3/02E02B3/12
CPCC04B28/00C04B38/0038C04B2111/00284E02B3/02E02B3/12C04B14/02C04B14/06C04B22/002C04B2103/302C04B2103/0068C04B2103/304C04B20/0048C04B38/0074C04B20/0052
Inventor 刘福胜翟盛通范华峰齐强张坤强温福胜孙鹏峰
Owner SHANDONG AGRICULTURAL UNIVERSITY