Water stopping and draining structure of hydropower station workshop

Abstract

The invention discloses a hydropower station workshop water stop and drainage structure which is suitable for a sectional type workshop, the workshop comprises an upstream inlet gate, a downstream tail water gate and a concrete bottom plate, an electromechanical equipment operation and maintenance space is formed between the upstream inlet gate and the downstream tail water gate and above the concrete bottom plate, a vertical upstream water stop belt is arranged in a transverse seam of the upstream inlet gate, and a vertical downstream water stop belt is arranged in a transverse seam of the downstream tail water gate. A vertical downstream water stop belt is arranged in the downstream tail water gate transverse joint, an electromechanical equipment peripheral water stop belt is arranged in the electromechanical equipment operation and maintenance space peripheral transverse joint, a drainage gallery is arranged in the concrete bottom plate, and a drainage gallery peripheral water stop belt is arranged in the drainage gallery peripheral transverse joint. A drainage pipe is further arranged between the transverse joint of the concrete bottom plate and the drainage gallery. The structure is ingenious, construction is easy, and leakage of river water and underground water to the workshop structure space can be effectively reduced; and meanwhile, by adopting different water-stop belt types, the cutting and bending of the steel bars caused by the water-stop belts are reduced, and great convenience is provided for the design and construction of a factory building structure.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering technology, and in particular to a water-stopping and drainage structure for a hydropower station powerhouse. Background Technology

[0002] The powerhouse of a hydroelectric power station is a crucial production site for converting water energy into electrical energy. Through a series of engineering measures, it smoothly guides water flow into the turbines and provides reliable space for electromechanical equipment, installation, maintenance, and operation personnel. Due to the operational requirements of the turbine generator units, the substructure of the powerhouse is typically lower than the normal water level of the river, making it susceptible to leakage from river water and groundwater.

[0003] To accommodate temperature changes, uneven foundation settlement, and facilitate construction, factory structures typically incorporate transverse joints running the entire length of the building. While these joints release structural stress, they also create weak points for water seepage. Therefore, the waterproofing and drainage systems at these transverse joints are crucial for ensuring the overall seepage prevention and safety of the factory building, directly impacting the safe and stable operation of the electromechanical equipment within.

[0004] A well-designed water-stopping and drainage structure can not only effectively seal critical parts such as horizontal joints and significantly reduce the leakage of river water and groundwater into the plant, but also create the necessary conditions for the long-term safe operation of the unit. At the same time, it can improve the design and construction quality of the plant project and has important engineering practice value. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a water-stopping and drainage structure for a hydropower plant building located at the transverse seam, specifically employing the following technical solution: The water-stopping and drainage structure of the hydropower station building described in this invention is applicable to segmented powerhouses with horizontal joints. The powerhouse includes an upstream inlet gate, a downstream tailrace gate, and a concrete base slab. An electromechanical equipment maintenance space is formed between the upstream inlet gate and the downstream tailrace gate, and above the concrete base slab. A vertical upstream water-stopping strip is provided in the horizontal joint of the upstream inlet gate, and a vertical downstream water-stopping strip is provided in the horizontal joint of the downstream tailrace gate. A perimeter water-stopping strip for the electromechanical equipment maintenance space is provided in the horizontal joint of the electromechanical equipment maintenance space. Multiple drainage channels are provided in the concrete base slab, and perimeter water-stopping strips are provided in the horizontal joints of the drainage channels. A drainage pipe is also provided between the horizontal joint of the concrete base slab and the drainage channels.

[0006] This invention establishes a first line of defense by setting an upstream waterstop at the upstream inlet gate and a downstream waterstop at the downstream tailrace gate, and a second line of defense by setting a perimeter waterstop around the mechanical and electrical equipment maintenance space. At the same time, drainage pipes leading to the drainage corridor inside the base slab are set in the transverse joints, thereby combining the sealing and diversion of water flow in the transverse joints of the plant, better ensuring the overall seepage prevention safety of the plant and guaranteeing the safe operation of the mechanical and electrical equipment inside the plant.

[0007] Preferably, an upstream water-stop pit and a downstream water-stop pit are provided within the rock mass beneath the concrete base slab. The upstream water-stop pit is correspondingly provided with an upstream water-stop strip, and the lower part of the upstream water-stop strip extends into the upstream water-stop pit. Similarly, the downstream water-stop pit is correspondingly provided with a downstream water-stop strip, and the lower part of the downstream water-stop strip extends into the downstream water-stop pit. The concrete water-stop pits provided on the concrete base slab, in conjunction with the upstream and downstream water-stop strips, constitute a tight seepage prevention system, effectively preventing water infiltration.

[0008] Preferably, the waterstop around the electromechanical equipment includes vertical sections installed in the upstream and downstream sidewalls of the electromechanical equipment operation and maintenance space, and connecting sections located in the concrete base slab between the vertical sections.

[0009] Preferably, the waterstop around the drainage gallery between the vertical sections is positioned above the connecting section. This invention fully considers the positional relationship between the waterstop around the drainage gallery and the waterstop around the electromechanical equipment, and aims to encompass the waterstop around the drainage gallery within the area of ​​the waterstop around the electromechanical equipment as much as possible, thereby strengthening the water-stopping effect and further improving the seepage prevention effect.

[0010] Preferably, both the upstream and downstream waterstops are embedded waterstops, and both the waterstops around the electromechanical equipment and the waterstops around the drainage corridor are surface-mounted multi-flange waterstops.

[0011] Preferably, the thickness of the concrete protective layer at the location of the embedded waterstop is increased from the usual 5cm to 25-30cm to meet the depth requirement of the embedded waterstop in the concrete structure. The thickness of the concrete protective layer at the location of the facing multi-flange waterstop remains unchanged at the usual 5cm, which also satisfies the depth requirement of the facing multi-flange waterstop in the concrete structure. Therefore, during the reinforcement construction of the factory building, only the reinforcement bars on both sides of the transverse joint at the upstream and downstream waterstops using the embedded waterstop need to be cut and bent. The reinforcement bars in other areas can be fabricated and installed according to normal procedures without additional cutting and bending work, reducing the difficulty of structural design, simplifying the work procedure, and improving construction efficiency.

[0012] Preferably, the drainage pipe is a PVC pipe with a diameter of 75-110mm. The inlet end of the drainage pipe is located inside the horizontal joint outside the waterstop around the drainage corridor, and the outlet end is located inside the drainage ditch at the bottom of the drainage corridor. The drainage pipe is installed at an angle downwards from the inlet end to the outlet end. This arrangement of the drainage pipe can promptly drain the accumulated water in the horizontal joint, improve the seepage prevention effect of the factory building, and better ensure the safety of the factory building against seepage.

[0013] The water-stopping and drainage structure for hydropower plant provided by this invention is ingenious and easy to construct. Through the organic combination of water-stopping and drainage measures, it effectively reduces the leakage of river water and groundwater into the plant structure space. At the same time, by adopting different types of water-stopping strips, it effectively reduces the cutting and bending of steel bars caused by the water-stopping strips, which greatly facilitates the design and construction of the plant structure and has important engineering practical significance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 yes Figure 1 Enlarged view of part A in the image.

[0016] Figure 3 yes Figure 2 BB section view. Detailed Implementation

[0017] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific construction processes are given. However, the scope of protection of the present invention is not limited to the following embodiments.

[0018] like Figure 1-3 As shown, the water-stopping and drainage structure of the hydropower plant of the present invention is suitable for segmented power plants with horizontal joints.

[0019] The aforementioned plant includes an upstream inlet gate, a downstream tailrace gate, and a concrete base slab. An electromechanical equipment maintenance space is formed between the upstream inlet gate and the downstream tailrace gate, and above the concrete base slab. Specifically, a vertical upstream waterstop 1 is installed in the horizontal joint of the upstream inlet gate, a vertical downstream waterstop 2 is installed in the horizontal joint of the downstream tailrace gate, a perimeter waterstop 3 is installed in the horizontal joint of the electromechanical equipment maintenance space, multiple drainage corridors 4 are installed in the concrete base slab, perimeter waterstops 5 are installed in the horizontal joints of the drainage corridors 4, and a drainage pipe 6 is installed between the horizontal joint of the concrete base slab and the drainage corridors 4.

[0020] The aforementioned upstream waterstop 1 extends downward from the inlet gate into the upstream concrete waterstop pit 7, and the downstream waterstop 2 extends downward from the tailrace gate into the downstream concrete waterstop pit 8. Both the upstream concrete waterstop pit 7 and the downstream concrete waterstop pit 8 are located in the rock mass under the concrete base plate.

[0021] The aforementioned waterstop 3 around the electromechanical equipment includes vertical sections 31 installed in the upstream and downstream sidewalls of the electromechanical equipment maintenance space, and connecting sections 32 located within the concrete base slab for connecting the vertical sections. The drainage corridor waterstop 5 between the vertical sections 31 is positioned above the connecting section 32. This invention fully considers the positional relationship between the drainage corridor waterstop 5 and the electromechanical equipment waterstop 3, encompassing the drainage corridor waterstop 5 within the area of ​​the electromechanical equipment waterstop 3 as much as possible, thereby strengthening the water-stopping effect and further improving the seepage prevention effect.

[0022] Preferably, both the upstream waterstop 1 and the downstream waterstop 2 are embedded waterstops, and both the waterstop 3 around the electromechanical equipment and the waterstop 5 around the drainage corridor are surface-mounted multi-flange waterstops.

[0023] In this embodiment, the upstream waterstop 1 and downstream waterstop 2 are made of type 651 rubber waterstop from Hebei Fengxing Rubber & Plastic Products Co., Ltd. The waterstop 3 around the electromechanical equipment and the waterstop 5 around the drainage corridor are connected by splicing the surface-mounted multi-flange waterstop described in ZL201520402670.6 and the surface-mounted multi-flange waterstop elbow described in ZL201820281499.1. The cross-sectional shape of the aforementioned surface-mounted multi-flange waterstop / waterstop elbow is U-shaped, and multiple raised strips are provided on the outer surface of the strip, with the height of the raised strips matching the thickness of the concrete protective layer (see...). Figure 3 Compared to embedded waterstops, this type of waterstop does not interfere with the position of the reinforcing bars 9 within the concrete protective layer on both sides of the transverse joint, thus eliminating the need to cut or bend the reinforcing bars inward. This invention, by employing a combination of these two types of waterstops, effectively reduces the structural design difficulty of the hydropower station building, simplifies the work procedures, and improves construction efficiency.

[0024] In this embodiment, multiple drainage pipes 6 are installed, all made of PVC pipes with a diameter of 75-110mm. The inlet end of the drainage pipe 6 is located inside the horizontal joint outside the waterstop 5 around the drainage corridor, and the outlet end of the drainage pipe 6 is located inside the drainage ditch at the bottom of the drainage corridor 4. The drainage pipe 6 is installed at an angle downwards from the inlet end to the outlet end. This arrangement of the drainage pipes 6 can promptly drain the accumulated water in the horizontal joint, improve the seepage prevention effect of the factory building, and effectively ensure the safety of the factory building.

[0025] As can be seen, the upstream waterstop 1 and downstream waterstop 2 of this invention are located around the factory building, forming the first line of defense against seepage. The waterstop 3 around the electromechanical equipment forms the second line of defense against seepage. Furthermore, a waterstop 5 around the drainage corridor 4 is set up around the drainage corridor 4, and a drainage pipe 6 is set between the transverse joint and the drainage corridor 4. This achieves an organic combination of the factory building's waterstop system and drainage system, providing a good working space for the normal operation and maintenance of the electromechanical equipment inside the factory building.

[0026] It should be noted that in the description of this invention, terms such as "front," "rear," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

Claims

1. A water-stopping and drainage structure for a hydropower station powerhouse, suitable for segmented powerhouses with transverse joints, characterized in that: The plant includes an upstream inlet gate, a downstream tailrace gate, and a concrete base slab. An electromechanical equipment maintenance space is formed between the upstream inlet gate and the downstream tailrace gate, and above the concrete base slab. A vertical upstream waterstop is installed in the horizontal joint of the upstream inlet gate, and a vertical downstream waterstop is installed in the horizontal joint of the downstream tailrace gate. A perimeter waterstop is installed in the horizontal joint of the electromechanical equipment maintenance space. Multiple drainage channels are provided in the concrete base slab, and perimeter waterstops are installed in the horizontal joints of the drainage channels. Drainage pipes are also installed between the horizontal joints of the concrete base slab and the drainage channels.

2. The water-stopping and drainage structure of the hydropower station powerhouse according to claim 1, characterized in that: An upstream water-stop pit and a downstream water-stop pit are provided in the rock mass under the concrete base slab. The upstream water-stop pit is provided in correspondence with the upstream water-stop strip, and the lower part of the upstream water-stop strip extends into the upstream water-stop pit. The downstream water-stop pit is provided in correspondence with the downstream water-stop strip, and the lower part of the downstream water-stop strip extends into the downstream water-stop pit.

3. The water-stopping and drainage structure of the hydropower station powerhouse according to claim 1, characterized in that: The waterstop around the electromechanical equipment includes vertical sections installed in the upstream and downstream sidewalls of the electromechanical equipment operation and maintenance space, and connecting sections located in the concrete base slab for connecting the vertical sections.

4. The water-stopping and drainage structure of the hydropower station powerhouse according to claim 3, characterized in that: The waterstop strip around the drainage corridor between the vertical sections is installed above the connecting section.

5. The water-stopping and drainage structure of the hydropower station powerhouse according to claim 1, characterized in that: Both the upstream and downstream waterstops are embedded waterstops, while the waterstops around the electromechanical equipment and the drainage corridor are surface-mounted multi-flange waterstops.

6. The water-stopping and drainage structure of the hydropower station powerhouse according to claim 5, characterized in that: The thickness of the concrete protective layer at the location of the embedded waterstop is 20-25cm, which is greater than the depth at which the embedded waterstop is embedded in the concrete structure. The thickness of the concrete protective layer at the location of the surface-mounted multi-flange waterstop is 5cm, which is greater than the depth at which the surface-mounted multi-flange waterstop is embedded in the concrete structure.

7. The water-stopping and drainage structure of the hydropower station powerhouse according to claim 1, characterized in that: The drainage pipe is a PVC pipe with a diameter of 75-110mm. The inlet end of the drainage pipe is set in the horizontal joint outside the waterstop around the drainage corridor, and the outlet end of the drainage pipe is set in the drainage ditch at the bottom of the drainage corridor. The drainage pipe is set inclined downward from the inlet end to the outlet end.

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