Barrier combination structure and method for ditch water treatment and debris flow protection

Abstract

The invention provides a blocking composite structure and method for gully water treatment and debris flow protection, which can effectively treat all-year-round running water of gullies and resist debris flow, and belongs to the field of water conservancy and hydropower constructions. The blocking composite structure comprises a water retaining dam and a drainage tunnel making an upstream riverway of the water retaining dam communicate with a downstream riverway, and further comprises an intercepting dam which is located on the upstream side of the water retaining dam. One end of the intercepting dam is connected with the edge of the riverway and the other end extends into the riverway. While the water retaining dam and the drainage tunnel are arranged, the intercepting dam is arranged on the upstream side of the water retaining dam, so that the blocking composite structure can perform effective blocking and drainage treatment on all-year-round running water of gullies, provide a temporary construction area for a downstream area, resist special natural disasters such as debris flow and prevent the damage to the water retaining dam caused by debris flow.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower structures, in particular to a barrier combination structure for ditch water treatment and debris flow protection for tributary valleys in alpine and canyon areas, and a barrier method using the barrier combination structure. Background technique [0002] When building a hydropower station in an alpine valley area, the tributary valleys are mostly full of perennial water and are cut deeply. There are very few construction sites near the dam area, and a large amount of construction waste needs to be piled up during the project construction, and various arrangements need to be made. Therefore, the tributary valleys near the dam site are often used as ditch-blocking spoil sites, construction auxiliary facilities areas, etc., and the valleys need to be treated with ditch water. The conventional ditch water treatment method mostly adopts the method of retaining dam + drainage tunnel, and...

AI Technical Summary

Problems solved by technology

However, due to the impact of heavy rain or other natural disasters, some valleys are prone to debris flow disasters. The debris flow can block the drainage holes and cause poor drainage. The debris flow will also cause a certain impact on the retaining dam, making the safety of the retaining dam lower.

Therefore, conventional ditch water treatment measures are difficult to meet the needs of engineering construction. It is necessary to study a water conservancy and hydropower engineering structure that can not only effectively block and treat perennial flowing water, but also resist the hazards of debris flow.

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