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Repair method and structure for aged hydraulic engineering asphaltic concrete anti-seepage face slab

An asphalt concrete and anti-seepage panel technology, which is applied in water conservancy projects, marine engineering, coastline protection, etc., can solve the problems of reducing the seepage resistance of dams, affecting the safe operation of water conservancy and hydropower projects, and aging of anti-seepage panels, so as to ensure the structure Stability and anti-seepage ability, improve anti-seepage ability, delay aging effect

Inactive Publication Date: 2015-08-26
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, asphalt concrete has its operating life as an anti-seepage body. After a long operation time, the asphalt concrete anti-seepage panel will age, which will reduce the anti-seepage capacity of the dam and affect the safe operation of water conservancy and hydropower projects.

Method used

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  • Repair method and structure for aged hydraulic engineering asphaltic concrete anti-seepage face slab

Examples

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Effect test

Embodiment 1

[0019] Embodiment one. structured as figure 1 shown. A method for repairing the aging of hydraulic asphalt concrete anti-seepage panels, comprising the following steps:

[0020] a. Grinding off the aging layer, using an attritor equipped with tooth grooves on the grinding disc to grind off the aging layer of the anti-seepage layer 4 .

[0021] b. Grinding at the cracks, a slope surface is ground between the cracks and the non-cracks for transition, and the thickness d of the cracks is greater than or equal to the crack depth;

[0022] c. The interface is formed, using a grinder provided with tooth grooves on the grinding disc to grind out a jagged interface 7 on the surface of the anti-seepage layer 4 after the aging layer is removed;

[0023] d. The anti-seepage layer 4 is repaired, and the anti-seepage layer 4 is repaired on the jagged interface 7 to form the anti-seepage repair layer 5. The thickness of the anti-seepage repair layer 5 is D=d+d1, and d1 is 0mm to 50mm . ...

Embodiment 2

[0027] Embodiment two. A method for repairing the aging of hydraulic asphalt concrete anti-seepage panels, comprising the following steps:

[0028] a. Grinding away the aging layer, using a grinder with a tooth groove on the grinding disc to remove the aging layer of the anti-seepage layer 4, first extracting a core sample with a diameter of 10cm at the aging place of the anti-seepage layer 4, and then measuring the core sample If the length of the upper aging part is 20mm, then the thickness of the aging layer is 20mm.

[0029] b. Grinding at the cracks, grinding a slope surface between the cracks and no cracks for transition, the slope of the slope is equal to 20%, and the thickness of the cracks is equal to the crack depth;

[0030] c, the interface is formed, using a grinder provided with tooth grooves on the grinding disc to grind out a jagged interface 7 on the surface of the anti-seepage layer 4 after the aging layer is removed, the tooth height of the zigzag interface...

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Abstract

The invention discloses a repair method and structure for an aged hydraulic engineering asphaltic concrete anti-seepage face slab. The repair method comprises the steps that firstly, an aged layer and cracks are removed through polishing, zigzag interfaces are formed through polishing, and then an anti-seepage repair layer and a closing layer are constructed. The structure formed according to the method comprises a base layer (1). A cushion layer (2) is arranged on the base layer (1). A leveling cementation layer (3) is arranged on the cushion layer (2). An anti-seepage layer (4) is arranged on the leveling cementation layer (3). The anti-seepage repair layer (5) is arranged on the anti-seepage layer (4). The closing layer (6) is arranged on the anti-seepage repair layer (5). The upper surface of the anti-seepage layer (4) and the lower surface of the anti-seepage repair layer (5) are provided with the zigzag interfaces (7) respectively. The repair method and structure have the advantages that the structural stability is high, aging is delayed and operation is easy; the anti-seepage capacity of a dam and the operation safety of hydraulic and hydroelectric engineering can be improved, and repair cost can be reduced.

Description

technical field [0001] The invention relates to a hydraulic asphalt concrete anti-seepage panel aging repair method and structure, in particular to a hydraulic asphalt concrete anti-seepage panel aging repair method and structure with high structural stability. Background technique [0002] Asphalt concrete has good impermeability, excellent flexible deformation characteristics and self-healing closure function, and is most suitable as the anti-seepage body of dams in water conservancy and hydropower projects. However, asphalt concrete has its operating life as an anti-seepage body. After a long operation time, the asphalt concrete anti-seepage panel will age, which will reduce the anti-seepage capacity of the dam and affect the safe operation of water conservancy and hydropower projects. Therefore, there is an urgent need for a method and structure that can effectively repair the aging of hydraulic asphalt concrete anti-seepage panels. Contents of the invention [0003] ...

Claims

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Application Information

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IPC IPC(8): E02B3/16E02B8/00
Inventor 周俊杰王亮春田伟周民权
Owner STATE GRID CORP OF CHINA
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