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Water stopping method applied to joint of hydropower station and water stopping structure thereof

A hydropower station and water-stopping technology, which is applied in water conservancy projects, marine engineering, construction, etc., can solve problems such as unsatisfactory water-stopping effects, damage to concrete panels, and poor structural stability, so as to improve airtightness and water-stopping effects, and water-stopping Good effect and easy construction

Inactive Publication Date: 2015-12-16
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fixing process of the anti-seepage protective cover is complicated, and it is necessary to open installation holes on the concrete panel, which will damage the concrete panel; in addition, the two sides of the anti-seepage protective cover are not easy to compact, and the expansion bolts are easy to move in the water level fluctuation area in cold regions. Frost heave falls off, the structural stability is poor, and there are defects such as lap joints between the peripheral joints and the vertical joints of the panel. Not only is the construction process more complicated, but also it is easy to form weak points of water sealing, and the water sealing effect is not ideal
[0003]Therefore, the existing seam sealing methods and joint water sealing structures used in hydropower stations have damage to the concrete panels, poor structural stability, and poor construction techniques. Problems with complex and unsatisfactory water-stopping effects

Method used

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  • Water stopping method applied to joint of hydropower station and water stopping structure thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment one. like figure 1 As shown, the seam sealing method used in hydropower stations includes the following steps:

[0020] a. Surface treatment, surface treatment is carried out on the concrete panel 2 at the joint 1, so that the surface of the concrete panel 2 within 13-20 cm on both sides of the joint 1 is flat and dry;

[0021] b. Install the rubber rod 4, fill the rubber rod 4 with a diameter of 10-15mm along the seam 1 to the bottom of the seam reserved groove 3;

[0022] c. Filler embedding, insert the plastic filler 5 into the seam reserved groove 3;

[0023] d. Scrape polyurea elastomer 7, use a sawtooth-shaped scraper to evenly scrape a layer of polyurea elastomer 7 on the surface of the concrete surface 2 and plastic filler 5 within 13 to 20 cm on both sides of the joint 1; then Adhere the base fabric 6 on the surface of the layer of polyurea elastomer 7, and finally scrape several layers of polyurea elastomer 7 evenly on the surface of the base fab...

Embodiment 2

[0026] Embodiment two. like figure 1 As shown, the seam sealing method used in hydropower stations includes the following steps:

[0027] a. Surface treatment. Surface treatment is carried out on the concrete panel 2 at the joint 1. First, use a putty knife and a wire brush to clean the loose concrete blocks in contact with the filler. Then use an angle grinder to grind and level; finally rinse with water to remove dust and dry, so that the surface of the concrete panel 2 within 13cm on both sides of the joint 1 is smooth, dense and dry;

[0028] b. Install the rubber rod 4, fill the rubber rod 4 with a diameter of 12 mm to the bottom of the seam reserved groove 3 along the seam 1;

[0029] c. Filler embedding, insert the plastic filler 5 into the seam reserved groove 3;

[0030] d. Scrape polyurea elastomer 7 (such as SK hand-scraped polyurea), use a sawtooth-shaped scraper to evenly scrape a layer of polyurea on the surface of the concrete surface 2 and plastic filler 5 w...

Embodiment 3

[0033] Embodiment three. like figure 1 As shown, the seam sealing method used in hydropower stations includes the following steps:

[0034] a. Surface treatment. Surface treatment is carried out on the concrete panel 2 at the joint 1. First, use a putty knife and a wire brush to clean the loose concrete blocks in contact with the filler. Then use an angle grinder to grind and level; finally rinse with water to remove dust and dry, so that the surface of the concrete panel 2 within 13cm on both sides of the joint 1 is smooth, dense and dry;

[0035] b. Install the rubber rod 4, fill the rubber rod 4 with a diameter of 12 mm to the bottom of the seam reserved groove 3 along the seam 1;

[0036] c. Filler embedding, insert the plastic filler 5 into the seam reserved groove 3;

[0037] d. Scrape polyurea elastomer 7 (such as SK hand-scraped polyurea), use a sawtooth-shaped scraper to evenly scrape a layer of polyurea on the surface of the concrete surface 2 and plastic filler 5...

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Abstract

The invention discloses a water stopping method applied to a joint of a hydropower station and a water stopping structure thereof. The method comprises the following steps: firstly carrying out surface treatment, then mounting a rubber rod and caulking a plastic packing, and finally scraping polyurea elastomers out. The water stopping structure formed according to the method comprises a concrete panel (2) with a joint (1), wherein a joint reservation groove (3) is formed above the joint (1); a rubber rod (4) is connected with the interior of the joint reservation groove (3); a plastic packing (5) is arranged above the rubber rod (4); a base fabric (6) is arranged above the plastic packing (5); polyurea elastomers (7) are arranged on the upper side and the lower side of the base fabric (6). According to the water stopping method and the water stopping structure, the rubber rod is used for preventing the water pressure change and the joint deformation from causing damage to the plastic packing; the base fabric is used for dispersing the stress in the polyurea elastomers; the damage to the concrete panel can be avoided; the structural stability is improved; the advantages of convenience in construction and excellent water-stopping effect are achieved.

Description

technical field [0001] The invention relates to a joint water-stop method and a water-stop structure, in particular to a joint water-stop method and a water-stop structure for a hydropower station. Background technique [0002] When there are joints on the concrete panels of the hydropower station, it is necessary to carry out water-stop treatment on the joints. At present, plastic fillers are usually used to fill the joints, and then cover the anti-seepage protection cover on the surface of the plastic filler. The anti-seepage protection cover is fixed with expansion bolts made of anti-rust treatment or stainless steel and angle steel or flat steel. However, the fixing process of the anti-seepage protective cover is complicated, and it is necessary to open installation holes on the concrete panel, which will damage the concrete panel; in addition, the two sides of the anti-seepage protective cover are not easy to compact, and the expansion bolts are easy to move in the wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/16
Inventor 王健何少云曹玺刘启明
Owner STATE GRID CORP OF CHINA
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