Drainage tunnel treatment method for building small and medium-sized reservoirs in karst depression areas

Abstract

The invention discloses a drainage tunnel treatment method for building small and medium-sized reservoirs in karst depression areas. The drainage tunnel treatment method comprises the following steps that a drainage tower is arranged by using a natural drainage tunnel in a natural reservoir basin, a trash rack, a gate and a channel connected with the natural drainage tunnel are arranged in the drainage tower, and a reinforced concrete locking opening is built in the natural drainage tunnel; and the drainage of flood and the plugging of the drainage tunnel during water storage of the reservoir are realized. According to the drainage tunnel treatment method for building the small and medium-sized reservoirs in the karst depression areas, the drainage tower is used for blocking the drainage tunnel when the reservoir normally stores water, the natural drainage tunnel is used as a flood discharge channel in the flood season, flood discharge is achieved by opening a gate structure in the drainage tower, and for reservoir construction with the reservoir basin condition of the natural drainage tunnel in a karst area, the blocking effect is good. Original hydrogeological conditions are damaged as little as possible, and the drainage tunnel treatment method for building the small and medium-sized reservoirs in the karst depression areas is eco-friendly to the tail end area of an original underground river system.

Description

technical field [0001] The invention relates to a sinkhole treatment method, in particular to a sinkhole treatment method for building medium and small reservoirs in karst depression areas. Background technique [0002] Karst depression is a common landform in karst areas, and it is a kind of negative landform with high surrounding and low in the middle developed by carbonate rock-dominated strata. Depressions gather the surface and underground runoff of a certain area of ​​mountains, and the middle of the terrain is low-lying, so the natural storage conditions are good. In the karst area dominated by karst depressions, long-term karstification has formed many seepage channels, coupled with the thin soil layer in the karst area, the atmospheric rainfall will soon be collected underground through karst ditches, funnels, and sinkholes, and the surface is dry and water-deficient . Therefore, it is a good and effective way to save and regulate water resources by using the favo...

AI Technical Summary

Problems solved by technology

The disadvantage of the conventional treatment method is that it basically destroys the original hydrogeological conditions and cuts off the water source of the ecosystem at the end of the underground river system. With the increase of the reservoir head, the possibility of further dissolution around the sealing body increases. Quality and durability largely determine the success or failure of a project

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