Restoration Structure and Construction Method of Sick Concrete Gravity Dam in Severe Cold Area

Abstract

The invention relates to a repair structure and a construction method of a pathological concrete gravity dam in a severe cold area. The invention aims to provide the repair structure and the construction method of the pathological concrete gravity dam in the severe cold area, which have the advantages of simple structure, convenience in construction, safety and reliability. The repair structure of the pathological concrete gravity dam in the severe cold area adopts the technical scheme that the repair structure is used for repairing the part, of which the anti-seepage performance is poor, of the water attaining surface of a dam body of the concrete gravity dam, brackets are arranged on the water attaining surface of the dam body and below the part of which the anti-seepage performance is poor, concrete protection plates which are formed in a way that a plurality of concrete precast blocks are overlapped and spliced and cover the water attaining surface of the dam body are arranged above the brackets and at a certain distance away from the water attaining surface of the dam body, the lower ends of the concrete protection plates are supported on the brackets, bituminous concrete anti-seepage plates are arranged between the concrete protection plates and the dam body, and the lower ends of the bituminous concrete anti-seepage plates are supported on the brackets. The repair structure and the construction method are suitable for structure repairing and other similar projects of the pathological concrete gravity dam of which the dam height is below 50 m in the severe cold area.

Description

technical field [0001] The invention relates to a repair structure and a construction method of a sickly concrete gravity dam in severe cold regions. It is suitable for structural repair and other similar projects of sick concrete gravity dams with a dam height below 50m in severe cold areas. Background technique [0002] Gravity dam is one of the earliest dam types in the world. Due to its simple structure and convenient construction, it has been designed and constructed in large numbers all over the world. In the early days of the founding of the People's Republic of China, in order to solve the problem of urban water use, my country built a number of water supply projects with concrete gravity dams as water retaining structures. After more than 60 years of operation, there have been many problems that need to be repaired, especially in the severe cold of the Northeast. area of ​​concrete gravity dams. After more than 60 years of operation in these harsh weather condition...

AI Technical Summary

Problems solved by technology

After more than 60 years of operation, the gravity dams under these harsh weather conditions all have varying degrees of aging. The dam body begins to seep, and the downstream dam surface freezes in winter, causing freeze-thaw damage to the downstream dam surface.

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