A foundation concrete face rockfill dam and its construction method

Abstract

The invention discloses a foundation concrete face rockfill dam and a construction method thereof, belonging to the technical field of hydropower engineering, comprising a face face rockfill dam, a face plate, a cushion area and a transition area a, the transition area a, the cushion area and The face panels are sequentially covered on the upstream face of the CFRD, a base is provided under the CFRD, and a transition zone b is provided between the base and the CFRD. This technical scheme adopts a layered structure by setting the base under the face rockfill dam, which fundamentally reduces the height of the rockfill body and the length of the face plate of the face rockfill dam, and reduces the dam crest elevation. The deformation of face rockfill dams and faces is reduced, making it easier to design, build and operate taller face rockfill dams to meet the technical requirements, and to control the deformation within a controllable range. Large but not higher than the limit of 250m class.

Description

technical field [0001] The invention belongs to the technical field of hydropower engineering, and relates to a new dam type applicable to face rockfill dams with a height of more than 70 meters, in particular to a base concrete face rockfill dam and a construction method thereof. Background technique [0002] Looking at the development history of face rockfill dams, from Tianshengqiao first-class face face rockfill dam (dam height 178m), Hongjiadu face face rockfill dam (dam height 179.5m) and other 180m face face rockfill dams to Shuibuya face face rockfill dam (dam height 179.5m) The height of the dam is 233m), and the maximum span of the dam height development reaches 53m; at present, the Shuibuya face rockfill dam, the highest built face rockfill dam, is running well, which shows that my country has the ability to design, construct, operate and manage 200m face face rockfill dams . However, while the recent construction of several 200m high face rockfill dams has achieve...

AI Technical Summary

Problems solved by technology

[0003] Due to the characteristics of dam materials, deformation during the filling process of face rockfill dams and during the operation period after impoundment is inevitable, but excessive deformation will cause extrusion damage of face panels and damage of seam seals, thereby increasing leakage amount, and even cause seepage stability damage, etc., threatening the overall stability of the dam

In addition, as the dam height of the conventional face rockfill dam increases, the chord length of the face face increases. After the storage level of the reservoir, the deflection and deformation of the face face will increase under the action of water pressure. Excessive deformation may cause the face face to break and cause the face face to lose its anti-seepage function.

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