Transverse crack treatment method for roller compacted concrete dam

A technology of roller compacted concrete and treatment methods, applied in dams, gravity dams, sea area engineering, etc., can solve problems such as inability to penetrate deep, leave hidden dangers, and cracks cannot be tracked and changed, so as to ensure the effect of sealing water and stop water, and facilitate drainage Gas, easy construction control and inspection effect

Active Publication Date: 2020-07-17
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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Problems solved by technology

[0003] The surface repair method, the surface repair method is widely used in practice, but this method also has great defects, it may cover up some unexplained cracks and cannot track the changes of the extended cracks; the second treatment method Cannot penetrate deep into the interior of the crack, which may leave hidden dangers

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  • Transverse crack treatment method for roller compacted concrete dam
  • Transverse crack treatment method for roller compacted concrete dam

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Embodiment example

[0083] Bailongtan Reservoir is located near Yuntaishan Town on Zhifanggou, a branch of Weihe River in Haihe River Basin, about 20 kilometers away from Jiaozuo City and Xiuwu County. Water and Hongshixia landscape water, solve the water problem of 3,000 people and 600 livestock within the irrigation area, and provide irrigation water for 18,000 mu of cultivated land.

[0084] The water retaining structure of Bailongtan Reservoir is a roller compacted concrete gravity dam with a foundation surface of 230.0m, a crest elevation of 294.2m, a maximum dam height of 64.2m, a crest length of 186m and a crest width of 5m. The dam body is divided into the non-overflow dam section on the left bank, the non-overflow dam section on the right bank and the overflow dam section on the river bed. The non-overflow dam section on the left bank is 58m long, the non-overflow dam section on the right bank is 88m long, and the overflow dam section on the river bed is 40.0m long. . The downstream dam...

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Abstract

The invention relates to the field of concrete defect treatment of hydraulic structures, in particular to a transverse crack treatment method for a roller compacted concrete dam. The method comprisesthe following steps of crack surface blocking, crack grouting and drilling, crack grouting and the like. A crack is blocked by using a grouting material to prevent a condition that leakage of a dam body exceeds a design standard as a result of dam leakage as stored water in a reservoir enters a roller compacted concrete crack under the action of a water head in front of the dam after the dam stores water and to prevent probability of displacement of the dam body as water leakage of the interlayer crack reduces the interlayer friction resistance of the roller compacted concrete. According to ajoint grouting system remedy principle, a slurry diffusing area is controlled by arranging a slurry outlet box for calculation so as to arrange a grouting system, grouting loops are arranged from bottom to top, slurry is fed in the lower grouting loop, the upper grouting loop is used to return slurry and exhaust, and the joint grouting system between two grouting loops is formed successively tilla crack area is integrally poured from bottom to top, so that it is ensured that the slurry is diffused uniformly when pouring the crack surface and it is beneficial to exhaust.

Description

technical field [0001] The invention relates to the field of concrete defect treatment of hydraulic structures, in particular to a method for treating penetrating cracks of roller compacted concrete dams. Background technique [0002] Cracks in concrete engineering are a ubiquitous and unavoidable problem. However, cracks in structures have a significant impact on the project, seriously affecting the quality of the structure, and even causing quality accidents. Therefore, when encountering concrete cracks during construction, it is necessary to carry out scientific analysis, and put forward corresponding treatment principles and specific measures. The common crack treatment methods mainly include the following: [0003] The surface repair method, the surface repair method is widely used in practice, but this method also has great defects, it may cover up some unexplained cracks and cannot track the changes of the extended cracks; the second treatment method It is impossibl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/16E02B7/00E02D15/04E02B7/10
CPCE02B3/16E02B7/00E02D15/04E02B7/10Y02A10/11
Inventor 陈敦刚董党尚会年张华
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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