Underground regulating tank with overflow structure

Abstract

The present invention discloses an underground regulating pond with an overflow structure, which includes a regulating pond chamber arranged below the ground surface and an overflow tunnel communicated with the regulating pond chamber. The overflow tunnel is fixedly connected to the upper half of the regulating pond chamber and extends in a direction away from the regulating pond chamber, and an overflow weir is arranged in the overflow tunnel. By improving the structure of the underground regulating pond, the present invention adds an overflow tunnel to the regulating pond chamber of the underground regulating pond to drain the regulating pond chamber. When the water inflow of the underground regulating pond exceeds the highest water level limit of the regulating pond chamber, the excess water body can overflow from the overflow dam into the overflow tunnel and be discharged through the overflow tunnel; the overflow weir can prevent the water body in the overflow tunnel from flowing back into the regulating pond chamber; the present invention can effectively avoid excessive accumulation of water bodies in the regulating pond chamber of the underground regulating pond and ensure that the water level in the regulating pond chamber is maintained below the highest limit water level at which the underground regulating pond can carry out normal water volume regulation work.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic engineering construction, and particularly to an underground regulating pool with an overflow structure. Background Art

[0002] A regulating pool can adjust the inflow and outflow of a power station. Generally, regulating pools are installed on the ground. However, installing a regulating pool on the ground is likely to damage the ecological environment. An underground regulating pool built underground can avoid affecting the surface environment. When a conventional surface regulating pool adjusts the water volume, if the inflow into the regulating pool is too large and exceeds the load of the regulating pool, the excess water can directly drain out from the edge of the regulating pool. However, an underground regulating pool is a closed chamber built underground. If the inflow exceeds the highest limit water level of the regulating pool chamber, the excess water cannot be quickly drained out, resulting in waterlogging in the underground regulating pool, seriously affecting the normal flow regulation function of the underground regulating pool, and even potentially endangering the upper-level hydropower station connected to the underground regulating pool. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an underground regulating pool with an overflow structure that can quickly drain excess water in the regulating pool chamber.

[0004] The technical solution adopted by the present invention to solve the above technical problem is: an underground regulating pool with an overflow structure, including a regulating pool chamber arranged below the ground surface and an overflow tunnel communicated with the regulating pool chamber. The overflow tunnel is fixedly connected to the upper half of the regulating pool chamber and extends in a direction away from the regulating pool chamber, and an overflow weir is arranged in the overflow tunnel.

[0005] Further: The overflow weir is a dam structure protruding upward from the bottom of the overflow tunnel, and both ends of the overflow weir extend in the width direction of the overflow tunnel to be respectively connected to the inner walls on both sides of the overflow tunnel.

[0006] Further: An overflow slope is arranged on the overflow weir, and the overflow slope is located on the side of the overflow weir facing away from the regulating pool chamber; the overflow slope slopes downward in the direction of the outward extension of the overflow tunnel.

[0007] Further: The overflow weir is arranged at the intersection of the overflow tunnel and the regulating pool chamber.

[0008] Further: The crest elevation of the overflow weir is flush with the highest limit water level of the regulating pool chamber.

[0009] Further: It further includes a cantilever bridge arranged in the regulating pool chamber, and the cantilever bridge is fixed to the upper half of the regulating pool chamber; the cantilever bridge extends along the length direction of the regulating pool chamber.

[0010] Furthermore, the cantilever bridge is a bridge structure that is anchored on the inner wall of the regulating pool cavern through anchor rods and is suspended in the air.

[0011] Furthermore, a guardrail is provided on the outer side of the cantilever bridge, which extends along the length direction of the cantilever bridge and is fixed on the cantilever bridge.

[0012] Furthermore, the regulating pool cavern is composed of a plurality of horizontal caverns arranged in a crisscross pattern and connected to a longitudinal cavern.

[0013] Furthermore, the overflow tunnel is connected to the outermost transverse cavern in the regulating tank cavern; in the outermost transverse cavern, the cantilever bridge is arranged on the inner wall of the side away from the overflow tunnel.

[0014] The beneficial effects of the present invention are as follows: the present invention improves the structure of the underground regulating tank, and adds an overflow tunnel to the regulating tank cavern of the underground regulating tank to drain the regulating tank cavern. When the water inflow of the underground regulating tank exceeds the maximum water level limit of the regulating tank cavern, the excess water can overflow from the overflow dam into the overflow tunnel and be discharged through the overflow tunnel; the overflow weir can prevent the water in the overflow tunnel from flowing back into the regulating tank cavern; the present invention can effectively avoid excessive accumulation of water in the regulating tank cavern of the underground regulating tank, and ensure that the water level in the regulating tank cavern is maintained below the maximum limit water level at which the underground regulating tank can perform normal water regulation work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an axonometric drawing of the present invention;

[0016] Figure 2 It is a cross-sectional view of the present invention.

[0017] Markings in the figure are: 100-regulating pool cavern, 110-cantilever bridge, 200-overflow tunnel, 300-overflow weir, 310-overflow slope. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention is further described below with reference to the accompanying drawings.

[0019] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", and "inside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description. They do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0020] like Figure 1 and Figure 2As shown in the figure, the underground regulation pool with an overflow structure disclosed by the present invention optimizes the structure of the underground regulation pool. An overflow tunnel 200 is added to the regulation pool chamber 100. One end of the overflow tunnel 200 communicates with the upper half of the regulation pool chamber 100, and the other end of the overflow tunnel 200 extends in a direction away from the regulation pool chamber 100 to the overflow water treatment area. An overflow weir 300 is provided inside the overflow tunnel 200. The overflow tunnel 200 of the present invention and the regulation pool chamber 100 are also arranged below the ground surface. The overflow tunnel 200 is a channel structure with a closed circumferential surface. Through the overflow tunnel 200, the excessive water overflowing from the regulation pool chamber 100 can be transported and discharged to avoid waterlogging in the regulation pool chamber 100.

[0021] In the present invention, an overflow weir 300 is arranged in the overflow tunnel 200. The overflow weir 300 is fixed at the bottom of the overflow tunnel 200 and protrudes upward. The specific structure of the overflow weir 300 is not limited, and a conventional dam structure can be used as the overflow weir 300. However, the overall length of the overflow weir 300 needs to be limited, and both ends of the overflow weir 300 must extend in the width direction of the overflow tunnel 200 to be respectively connected to the inner walls on both sides of the overflow tunnel 200. The connection between the overflow weir 300 and the overflow tunnel 200 is sealed. The overflow weir 300 and the overflow tunnel 200 can also be directly formed by integral casting to avoid leakage caused by the gap between the inner walls of the overflow weir 300 and the overflow tunnel 200. By setting the overflow weir 300, the excessive water in the regulation pool chamber 100 can overflow from the weir crest of the overflow weir 300 into the overflow tunnel 200 and then be discharged along the overflow tunnel 200. Due to the height difference between the overflow weir 300 and the overflow tunnel 200, the overflow weir 300 can block the overflow water, and the overflow water in the overflow tunnel 200 will not flow back, thus avoiding the overflow water in the overflow tunnel 200 from flowing back into the regulation pool chamber 100. The bottom surface of the overflow tunnel 200 can also be optimized. The bottom surface of the overflow tunnel 200 is set as an inclined surface, so that the bottom surface of the overflow tunnel 200 slopes downward from the end connected to the overflow weir 300 to the other end, making the height of the end of the overflow tunnel 200 connected to the overflow weir 300 higher than the height of the other end connected to the drainage area. This can further avoid the overflow water in the overflow tunnel 200 from flowing back and is also beneficial to improving the drainage efficiency and drainage effect of the overflow tunnel 200.

[0022] As described above, the overflow weir 300 is a dam structure provided at the bottom of the overflow tunnel 200 and protruding upward. There is an elevation difference between the overflow weir 300 and the bottom surface of the overflow tunnel 200. The overflow weir 300 is vertically transitioned with the bottom of the overflow tunnel 200. When the excess water in the regulating pond chamber 100 overflows from the crest of the overflow weir 300 into the overflow tunnel 200, water body drop will occur; if there is overflow water body in the overflow tunnel 200, the dropped water body will impact the water body in the overflow tunnel 200 and cause turbulence, interfering with the flow of the overflow water body in the overflow tunnel 200, thereby affecting the conveyance of the overflow water body by the overflow tunnel 200; if there is no overflow water body in the overflow tunnel 200, the overflow water body dropping from the overflow weir 300 will directly impact the bottom surface of the overflow tunnel 200, and long-term scouring is likely to cause wear of the overflow tunnel 200, thereby affecting the service life of the overflow tunnel 200. To solve the above problems, as Figure 2 shown, the present invention provides an overflow slope 310 on the overflow weir 300. The overflow slope 310 is located on the side of the overflow weir 300 facing away from the regulating pond chamber 100, and the overflow slope 310 slopes downward in the direction extending outward towards the overflow tunnel 200, so as to form an inclined transition between the overflow weir 300 and the overflow tunnel 200. The overflow water body overflowing from the crest of the overflow weir 300 can flow into the overflow tunnel 200 along the overflow slope 310, effectively reducing the scouring of the overflow water body overflowing from the crest of the overflow weir 300 on the water body in the overflow tunnel 200 and the bottom surface of the overflow tunnel 200, ensuring the normal conveyance of the water body in the overflow tunnel 200, and at the same time improving the service life of the overflow tunnel 200.

[0023] The overflow weir 300 is preferably provided at the intersection of the overflow tunnel 200 and the regulating pond chamber 100, and the crest elevation of the overflow weir 300 is flush with the highest limit water level of the regulating pond chamber 100, so as to ensure that when the water level in the regulating pond chamber 100 reaches the highest limit water level of the regulating pond chamber 100, the excess water body can overflow from the overflow weir 300 to the overflow tunnel 200 for conveyance and discharge in the first time.

[0024] As Figure 2As shown, in the present invention, a cantilever bridge 110 is further provided in the regulating pool cavern 100. The cantilever bridge 100 can be a bridge structure that is anchored on the inner wall of the regulating pool cavern 100 by anchor rods and is suspended in the air. The cantilever bridge 110 is fixed to the upper half of the regulating pool cavern 100. The work team can use the cantilever bridge 110 to conduct regular inspections or maintenance on the regulating pool cavern 100, and at the same time, can observe the water level in the regulating pool cavern 100. The cantilever bridge 110 extends along the length of the regulating pool cavern 100, and the staff can walk along the cantilever bridge 110 to the ends of the regulating pool cavern 100. Guardrails for protecting the staff can also be provided on the outer edges of the cantilever bridge 110. The guardrails extend along the length of the cantilever bridge 110 and are fixed to the cantilever bridge 110.

[0025] The regulating pond cavern 100 of the present invention can adopt a separate underground cavern structure; since underground regulating ponds are usually used in conjunction with surface power stations to regulate the water inlet and outlet of the surface power stations, the regulating pond cavern 100 of the present invention can also adopt a regulating pond cavern 100 composed of a plurality of horizontal caverns arranged in a crisscross pattern and connected to a longitudinal cavern to achieve series connection with a multi-stage power station. The overflow tunnel 200 is connected to the outermost horizontal cavern in the regulating pond cavern 100; in the outermost horizontal cavern, a cantilever bridge 110 is set on the inner wall of the side away from the overflow tunnel 200 to avoid affecting the normal operation of the overflow weir 300 and the overflow tunnel 200, and at the same time, it can also improve the safety of the workers on the cantilever bridge 110.

Claims

1. An underground regulating tank with an overflow structure, characterized in that: It includes a regulating pond chamber (100) arranged below the ground surface and an overflow tunnel (200) communicated with the regulating pond chamber (100). The overflow tunnel (200) is fixedly connected to the upper half of the regulating pond chamber (100) and extends in a direction away from the regulating pond chamber (100). An overflow weir (300) is arranged in the overflow tunnel (200). The overflow weir (300) is a dam structure protruding upward from the bottom of the overflow tunnel (200). The two ends of the overflow weir (300) extend in the width direction of the overflow tunnel (200) and are respectively connected to the inner walls on both sides of the overflow tunnel (200). An overflow slope surface (310) is arranged on the overflow weir (300). The overflow slope surface (310) is located on the side of the overflow weir (300) facing away from the regulating pond chamber (100). The overflow slope surface (310) slopes downward in the direction of the outward extension of the overflow tunnel (200). The overflow weir (300) is arranged at the intersection of the overflow tunnel (200) and the regulating pond chamber (100). It also includes a cantilever bridge (110) arranged in the regulating pond chamber (100). The cantilever bridge (110) is fixed to the upper half of the regulating pond chamber (100). The cantilever bridge (110) extends along the length direction of the regulating pond chamber (100). The cantilever bridge (110) is a bridge structure anchored to the inner wall of the regulating pond chamber (100) by anchor bolts and arranged in a suspended manner. A guardrail extending along the length direction of the cantilever bridge (110) and fixed to the cantilever bridge (110) is arranged on the outer side edge of the cantilever bridge (110). The regulating pond chamber (100) is composed of a plurality of horizontally and vertically criss-crossed transverse chambers and longitudinal chambers communicated with each other. The overflow tunnel (200) is communicated with the outermost transverse chamber in the regulating pond chamber (100). In the outermost transverse chamber, the cantilever bridge (110) is arranged on the inner wall on the side facing away from the overflow tunnel (200).

2. The underground regulating tank with an overflow structure according to claim 1, characterized in that: The crest elevation of the overflow weir (300) is flush with the highest limiting water level of the regulating pond chamber (100).

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