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Cracking protection method for concrete dams

A technology of concrete and dam body, applied in coastline protection, water conservancy engineering, sea area engineering, etc., can solve the problem of high cost of temperature control, achieve the effects of reducing project investment, improving stress state, and good economic benefits

Inactive Publication Date: 2013-07-10
POWERCHINA BEIJING ENG
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Problems solved by technology

This method tends to be more costly for temperature control

Method used

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  • Cracking protection method for concrete dams

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0017] The present invention makes full use of the characteristics that the silt entering the dam after operation will cause the formation of hyperpycnal flow in front of the dam, which will increase the water temperature at the bottom of the dam and will form silt deposits in front of the dam, and artificially fill in the silt deposit range in front of the dam body in advance. The combination of sand and thermal insulation materials plays a protective role in preventing cracking of the dam body, thereby reducing the requirement on the temperature difference between the dam body and the outside world, and simplifying the temperature control measures. Specifically:

[0018] (1) Thermal insulation material is provided on the surface of the upstream side of the dam body; (2) Sand is filled outside the thermal insulation material in the restricted a...

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Abstract

The invention discloses a cracking protection method for concrete dams. During construction of a concrete dam, insulation material is arranged on the upstream surface of a dam body. After certain strength of dam concrete is reached, sand is manually filled on the upstream side of the insulation material. Soil filled in front of the dam and the insulation material jointly act to protect the dame in construction period in cold seasons or increase dam-front reservoir water temperature in dam operation period to decrease temperature difference, so that dam cracking is protected. The feature that bottom water temperature rises and sediment accumulation occurs in front of the dam due to density flow of entering sediment generated in front of the dam after operation is utilized fully, dam cracking protection measures and construction dam temperature control measures are simplified, temperature control is easier, temperature control cost is lower, engineering investment is lower, and fine economic benefit is obtained.

Description

technical field [0001] The invention relates to a dam body anti-crack protection method, in particular to a concrete dam body anti-crack protection method in water conservancy and hydropower projects. Background technique [0002] In the low temperature season of the concrete dam body during the construction period, if the temperature of the dam body and its foundation restraint area is high, and the temperature difference is large, there may be problems due to the low early tensile strength of the dam body concrete and the large temperature stress during the construction period. The risk of cracking of the dam body is greater in the strongly constrained area of ​​the dam body that is strongly constrained by the foundation rock mass. In order to prevent the dam body from cracking, it is necessary to protect the entire dam body, especially the strong confinement area of ​​the dam body, in low temperature seasons. In addition, if the temperature of the dam body is higher than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/02
Inventor 邓毅国苏岩王毅鸣林健勇杨子强
Owner POWERCHINA BEIJING ENG
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