Shoreside flood discharge arrangement structure of gravity dam
By arranging a power plant behind the dam on the riverbed downstream of the gravity dam and setting up spillways and flood discharge holes on the dam bank, the problems of inconvenient construction and high investment of underground power plants were solved, and the project investment was saved and the construction difficulty was reduced.
Patent Information
- Application Number
- CN202422889812.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-26
AI Technical Summary
In narrow river valleys, the hub layout of roller-compacted concrete gravity dams usually adopts a shore-side water diversion method to discharge flood water. However, the construction of underground power plants is inconvenient, the subsequent maintenance is difficult and the investment is high, which is difficult to effectively solve with existing technologies.
A power plant behind the dam is arranged on the riverbed downstream of the gravity dam, and spillways and flood discharge holes are set up on the dam bank, connected to the diversion structure through a vortex shaft, avoiding the construction of a large-span underground power plant.
It saves project investment, simplifies construction and maintenance, and reduces construction difficulty and cost.
Smart Images
Figure CN223481780U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a flood discharge arrangement structure on the bank of a gravity dam, belonging to the field of hydropower station engineering technology. Background Technology
[0002] The layout of gravity dams typically prioritizes spillway discharge. For high dams with large flood flows and narrow river channels, methods such as overflow from the powerhouse roof, spillway from the powerhouse front, internal powerhouse, or underground powerhouse can be used for spillway discharge. However, the layout of roller-compacted concrete gravity dams in narrow river valleys usually requires the use of bank-side diversion and underground powerhouses for spillway discharge. However, underground powerhouses have drawbacks such as inconvenient construction, poor lighting in the later stages, and high difficulty in operation and maintenance, while also significantly increasing project investment. Therefore, the layout of roller-compacted concrete gravity dams in narrow river valleys usually prioritizes bank-side diversion for spillway discharge. In this case, how to arrange the bank-side diversion roller-compacted concrete gravity dam is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a gravity dam bank flood discharge arrangement structure.
[0004] This utility model is achieved through the following technical solution:
[0005] A gravity dam bank spillway arrangement includes a gravity dam, a downstream power plant is located on the riverbed downstream of the gravity dam, the downstream power plant is connected to the water-retaining section of the gravity dam through a water diversion system, and bank spillway structures and diversion structures are provided on the bank of the gravity dam to discharge water upstream of the gravity dam to the downstream.
[0006] The shoreline flood discharge structures include spillways and flood discharge outlets.
[0007] The spillway is either open or tunnel-type.
[0008] The flood discharge outlet is a tunnel type.
[0009] The bottom elevation of the spillway is higher than that of the flood discharge outlet.
[0010] The elevation of the bottom plate of the diversion structure is lower than the elevation of the bottom plate of the flood discharge and venting hole.
[0011] The flood discharge and venting hole is connected to the diversion structure through a vortex shaft.
[0012] Both the flood discharge and venting orifice and the diversion structure are equipped with air replenishment tunnels.
[0013] The beneficial effects of this utility model are as follows: the downstream power plant is located on the riverbed downstream of the gravity dam, that is, the downstream power plant is a riverbed power plant. At the same time, the flood discharge structure and diversion structure on the bank are arranged on the bank of the gravity dam. By adopting this hub layout pattern or method, the arrangement of the bank water diversion power generation system and the large-span underground power plant is avoided, which greatly saves the project investment. Attached Figure Description
[0014] Figure 1 It is a structural diagram of the present utility model.
[0015] In the diagram: 1-dam section, 2-water diversion system, 3-power plant behind the dam, 4-flood discharge structure on the bank, 41-spillway, 42-flood discharge outlet, 421-vortex shaft, 422-air replenishment tunnel, 5-diversion structure. Detailed Implementation
[0016] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.
[0017] like Figure 1 As shown, the present invention discloses a gravity dam bank spillway layout structure, comprising a gravity dam, a downstream power plant 3 located on the riverbed downstream of the gravity dam, the downstream power plant 3 being connected to the dam section 1 of the gravity dam via a water diversion system 2, and a bank spillway structure 4 and a diversion structure 5 disposed on the bank of the gravity dam to discharge water upstream to downstream. By arranging the downstream power plant 3 on the riverbed downstream of the gravity dam (i.e., the downstream power plant 3 is a riverbed-type power plant), and simultaneously arranging the bank spillway structure 4 and the diversion structure 5 on the bank of the gravity dam, this hub layout avoids the need for a bank-side water diversion and power generation system and a large-span underground power plant, significantly saving on project investment.
[0018] The shore spillway structure 4 includes a spillway 41 and a flood discharge outlet 42.
[0019] The spillway 41 is either open or tunnel-type.
[0020] The flood discharge and venting hole 42 is a tunnel type.
[0021] The bottom elevation of the spillway 41 is higher than the bottom elevation of the flood discharge outlet 42.
[0022] The elevation of the bottom plate of the diversion structure 5 is lower than the elevation of the bottom plate of the flood discharge and venting hole 42.
[0023] The flood discharge and venting hole 42 is connected to the diversion structure 5 through the vortex shaft 421.
[0024] Both the flood discharge and venting hole 42 and the diversion structure 5 are equipped with air replenishment holes 422.
Claims
1. A flood discharge arrangement structure on the bank of a gravity dam, characterized in that: The system includes a gravity dam, with a downstream power plant (3) located on the riverbed downstream of the gravity dam. The downstream power plant (3) is connected to the water-retaining section (1) of the gravity dam via a water diversion system (2). The gravity dam is equipped with a flood discharge structure (4) and a diversion structure (5) on its bank to discharge water upstream of the gravity dam to the downstream.
2. The gravity dam bank spillway arrangement structure as described in claim 1, characterized in that: The shore spillway structure (4) includes a spillway (41) and a flood discharge outlet (42).
3. The gravity dam bank spillway arrangement structure as described in claim 2, characterized in that: The spillway (41) is either open or tunnel-type.
4. The gravity dam bank spillway arrangement structure as described in claim 2, characterized in that: The flood discharge and venting hole (42) is a tunnel type.
5. The gravity dam bank spillway arrangement structure as described in claim 2, characterized in that: The bottom elevation of the spillway (41) is higher than the bottom elevation of the flood discharge outlet (42).
6. The gravity dam bank spillway arrangement structure as described in claim 5, characterized in that: The bottom elevation of the diversion structure (5) is lower than the bottom elevation of the flood discharge outlet (42).
7. The gravity dam bank spillway arrangement structure as described in claim 6, characterized in that: The flood discharge outlet (42) is connected to the diversion structure (5) through the vortex shaft (421).
8. The gravity dam bank spillway arrangement structure as described in claim 6 or 7, characterized in that: Both the flood discharge outlet (42) and the diversion structure (5) are equipped with air replenishment ducts (422).