Multifunctional ecological water supply hole structure for ultrahigh rock-fill dam

Abstract

The invention discloses a multifunctional ecological water supply hole structure for an ultrahigh rock-fill dam and an operation method, and belongs to the field of water resources and hydropower engineering. The multifunctional ecological water supply hole structure for the ultrahigh rock-fill dam can form different structures in different operation phases to achieve different functions and effects, is simple in structure arrangement and convenient to construct, synchronously has an ecological water supply function, a water storage and discharge control function, a maintenance period guide function and a flood season guide season function to achieve multiple effects, meets multiple demands of ultrahigh core-wall rock-fill dam engineering, can reduce other corresponding functional tunnelsneeded by the ultrahigh core-wall rock-fill dam engineering under the condition with corresponding functions, reduces the engineering quantity, and saves the engineering investment.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a multifunctional ecological water supply tunnel structure and an operation method, and is especially suitable for super-high rockfill dam projects. Background technique [0002] At present, several 300m-level extra-high rockfill dam hydropower projects are being built, planned and designed in Southwest my country, such as Shuangjiangkou 312m, Lianghekou 295m, and Rumei 315m. These ultra-high rockfill dams are located in alpine valleys, with steep slopes on both sides of the river bed. The tunnel diversion scheme of excavating corresponding diversion tunnels in the mountains is adopted for construction diversion, so that the upstream river can be diverted and flow into the downstream river through the diversion tunnel. Inside; the diversion hole generally includes the initial diversion hole and the late diversion hole. [0003] With the continuous impr...

AI Technical Summary

Problems solved by technology

However, due to the high water level during construction during the flood season, the tunnel body is in a state of pressurized flow, which will cause certain erosion damage to the sluice chamber in the ecological water supply tunnel. The traditional ecological water supply tunnel sluice chamber cannot withstand the pressure during the flood season. The impact of water flow makes the ecological water supply tunnel unable to participate in the flood diversion during the flood season

[0007] In addition, traditional ecological water supply tunnels often do not control and adjust the flow of ecological water supply. For ultra-high rockfill dams, the rate of water level rise needs to be controlled during the water storage period to ensure the safety of the rockfill dam body. Therefore, for ecological water supply In addition to the ecological water supply function, the cave also needs to be able to control the rising speed of the water storage level.

[0008] In summary, traditional ecological water supply tunnels cannot meet the multi-functional requirements of ultra-high rockfill dams. Therefore, expanding the functions of ecological water supply tunnels enables ecological water supply tunnels to be able to withstand floods and diversion during the entire operation period, and can be used for initial diversion tunnel maintenance. And the function of controlling the discharge of ecological flow is of great significance to the construction of ultra-high rockfill dams

Images