Flow guiding system for canyon area high dam hydropower engineering slag field valley water

Abstract

The invention discloses a flow guiding system for canyon area high dam hydropower engineering slag field valley water and a construction method thereof in the field of water conservancy and hydropower engineering. The flow guiding system comprises a water retaining dam arranged in a tributary valley; the water retaining dam is located on the upstream of a large-scale cavity group outlet; a slag stacking area is arranged on the back of the water retaining dam; a water draining culvert pipe is arranged at the bottom of the water retaining dam; a water draining cavity is formed in the upstream side of the water retaining dam; a cavity body of the water draining cavity penetrates through a mountain forest; and an outlet of the water draining cavity is formed in the downstream of the slag stacking area in the tributary valley or other river channel slopes. Through comprehensive utilization of two water draining ways, the cavity diameter of the water draining cavity can be decreased, the length of the water draining culvert pipe is shortened, the construction cost is obviously reduced, the construction difficulty is reduced, and meanwhile adaptability of the water draining cavity to the unfavorable geologic condition is strengthened; and the water draining cavity and the water draining culvert pipe can be periodically repaired in turn, the service life period of the system is prolonged, and the safety of the dam engineering construction period is guaranteed.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a ditch water diversion system and a construction method for slag field ditch water in a high dam hydropower project in a canyon area. Background technique [0002] At present, many large-scale high-dam hydropower projects are being built in the alpine and canyon areas of southwest my country, such as Shuangjiangkou, Lianghekou, Yebatan, Baihetan, etc. These projects are difficult to construct and have a long construction period. Construction waste slag needs to be stored or transferred, and various construction auxiliary facilities need to be arranged. However, there is almost no construction site available near the dam area. Therefore, only the tributary valley in the dam site area is used as a large-scale ditch-type waste slag field. These tributary valleys are deeply cut, and have the characteristics of large flow, large amount of suspended mass, and ...

AI Technical Summary

Problems solved by technology

[0005] For option (2): the drainage channel needs to occupy the ground area of ​​the valley, which is difficult to adapt to the topographic features of the canyon area;

[0006] For option (3): the ditch water in Southwest China contains a lot of suspended matter such as sand, stones, and branches, and the culverts are prone to blockage or structural wear after long-term operation. However, it is difficult to meet maintenance conditions when the culverts are buried underground, and the drainage capacity of the culverts is limited.

Images