Underground powerhouse of low-vibration pumped storage power station

Abstract

The utility model discloses a low-vibration pumped storage power station underground powerhouse which comprises a powerhouse body, a machine pier is arranged in the middle of an inner cavity of the powerhouse body, a plurality of floor beam plates are arranged between the machine pier and the side wall of the inner cavity of the powerhouse body, and reinforcing anchor rods are evenly arranged on the outer side wall of the powerhouse body. The inner side ends of the reinforcing anchor rods are fixedly connected with the floor beam plates in a one-to-one correspondence mode, and random anchor rods are arranged on the outer side wall of the plant. According to vibration of a floor where a hydraulic vibration source is located, the reinforcing anchor rods are arranged on the outer wall, and the middle layer is arranged inside, so that lateral support of surrounding rock to a plant is improved, lateral support of plant components to machine piers is also improved, and vibration of the plant is reduced; by means of a reasonable structure parting mode between every two adjacent machine pier fixing structures, lateral supporting of the floor beam plates and the supporting beams to the machine piers is improved, and vibration of the machine piers is reduced.

Description

Technical Field

[0001] The utility model relates to an underground plant of a low-vibration pumped storage power station, belonging to the technical field of water conservancy and hydropower. Background Art

[0002] The vibration of the plant structure of a pumped storage power station mainly comes from three sources: mechanical vibration, electromagnetic vibration, and hydraulic vibration. Among them, low-frequency vibration is mainly caused by mechanical vibration and hydraulic vibration; high-frequency vibration is mainly caused by hydraulic vibration. It is generally believed that the hydraulic vibration source has the greatest impact on the vibration of the plant structure. In underground powerhouses, the hydraulic vibration sources mainly occur on the generator floor and the turbine floor. For conventional pumped storage power stations, multiple units are usually used. For example, a 120MW energy storage power station is usually composed of 4 single-unit 30MW units. The units are embedded in the concrete piers around them. The piers are components that directly bear the load of the units and transmit vibrations. Excessive vibration of the plant directly affects the overall safety of the plant structure and the stability of the unit operation. Therefore, we propose a low-vibration underground plant for pumped storage power stations. Utility Model Content

[0003] The purpose of the utility model is to provide an underground powerhouse of a low-vibration pumped-storage power station to solve the problem of excessive vibration of the powerhouse. It can not only reduce the vibration of the powerhouse, but also improve the lateral support of the beams and columns to the machine piers, thereby reducing the vibration of the machine piers.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: an underground powerhouse of a low-vibration pumped-storage power station, including a powerhouse, which is composed of walls on all sides and an arch on the top of the wall. An organic pier is arranged in the middle of the inner cavity of the powerhouse, and a plurality of floor beams are arranged between the organic pier and the side walls of the inner cavity of the powerhouse. The floor beams can divide the interior of the powerhouse into a generator layer, an intermediate layer, a turbine layer, a volute layer, and a tailwater pipe layer. The outer wall of the powerhouse is evenly provided with reinforcing anchor rods, and the inner ends of the reinforcing anchor rods are fixedly connected to the floor beams and correspond one to one. By providing the reinforcing anchor rods and the intermediate layer, the lateral support of the surrounding rock to the powerhouse and the powerhouse components to the organic pier is improved, thereby reducing the vibration of the powerhouse, and the outer wall of the powerhouse is provided with random anchor rods.

[0005] The above-mentioned underground powerhouse of a low-vibration pumped-storage power station is composed of anchor-sprayed concrete and reinforced concrete layers. The reinforced concrete layer is placed on the inner side of the anchor-sprayed concrete, and the random anchor rods are arranged on the outer side of the anchor-sprayed concrete. When the rock layer is excavated, the arch and surrounding walls of the powerhouse are supported by anchor-sprayed concrete and fixed with random anchor rods to ensure the stability of the rock around the powerhouse.

[0006] In the aforementioned low-vibration pumped-storage power station underground plant, stairs are provided between adjacent floor beams and slabs.

[0007] The aforementioned underground powerhouse of a low-vibration pumped-storage power station, the floor beams and slabs include support beams and floor slabs, the support beams are arranged between the machine pier and the side walls of the inner cavity of the powerhouse, a plurality of the support beams are crisscrossed to form a layered structure, and the support beam layers are arranged in multiple layers, each layer of the support beams is fixedly provided with a floor slab, the machine pier is connected to the floor beams and slabs on each floor to enhance lateral support for the machine pier.

[0008] In the aforementioned underground powerhouse of a low-vibration pumped-storage power station, a mixed flow reversible unit is embedded and installed in the middle of the pier, and a reserved seam is provided between the floor beams and slabs of two adjacent piers. Through this seam-dividing method, the increase in the stiffness of the supporting beam is utilized to improve the horizontal stiffness of the floors around the pier, thereby strengthening the lateral support for the pier and reducing vibration.

[0009] The aforementioned underground powerhouse of a low-vibration pumped-storage power station has a crane beam disposed on the top of the inner cavity of the powerhouse.

[0010] In the aforementioned low-vibration pumped-storage power station underground powerhouse, the anchor shotcrete thickness is 10-15 cm, and the reinforced concrete layer thickness is 85-95 cm.

[0011] The aforementioned underground powerhouse of a low-vibration pumped-storage power station has buttresses arranged on the four side walls thereof, and the buttresses are 1.8-2.5 m in height.

[0012] In the aforementioned low-vibration pumped-storage power station underground powerhouse, the diameter of the reinforcing anchor rod is 25 mm, the reinforcing anchor rod is evenly arranged along the length direction of the powerhouse, the spacing between two adjacent reinforcing anchor rods is 1 m, and the depth of penetration into the rock is 1.5-2.5 m.

[0013] In the aforementioned low-vibration pumped-storage power station underground powerhouse, the diameter of the random anchor rod is 25 mm, and the depth of penetration into the rock is 0.5-1 m.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] (1) The utility model aims at the vibration of the floor where the hydraulic vibration source is located. By setting a reinforcing anchor rod on the outer side of the outer wall at the corresponding position of the main vibration floor and setting an intermediate layer inside, the lateral support of the surrounding rock to the powerhouse is improved, and the lateral support of the powerhouse components to the machine pier is also improved, thereby reducing the vibration of the powerhouse;

[0016] (2) The utility model improves the lateral support of the machine pier by the floor beam and the support beam through a reasonable structural joint mode between the fixed structures of two adjacent machine piers, thereby reducing the vibration of the machine pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall cross-section of the utility model;

[0018] Figure 2 It is a plan view of the utility model.

[0019] Figure numerals: 1-factory building, 2-machine pier, 3-floor beam and slab, 4-reinforcement anchor rod, 5-random anchor rod, 6-anchor shotcrete, 7-reinforced concrete layer, 8-staircase, 9-support beam, 10-floor slab, 11-mixed flow reversible unit, 12-reserved joint, 13-crane beam.

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0021] Embodiment 1 of the present utility model: An underground powerhouse of a low-vibration pumped-storage power station, comprising a powerhouse 1, which is entirely arranged in the underground surrounding rock. The powerhouse 1 is composed of walls on all sides and a vault on the top. An organic pier 2 is arranged in the middle of the inner cavity of the powerhouse 1, and a plurality of floor beams and slabs 3 are arranged between the organic pier 2 and the inner cavity side walls of the powerhouse 1. The floor beams and slabs 3 divide the interior of the powerhouse 1 into a generator layer, an intermediate layer, a turbine layer, a volute layer, and a tailwater pipe layer. The generator layer and the turbine layer have relatively large heights, and an intermediate layer is arranged between the generator layer and the turbine layer to further improve the overall horizontal stiffness of the structure of the powerhouse 1 and reduce the vibration of the powerhouse 1 itself. The outer wall of the powerhouse 1 is evenly provided with reinforcing anchor rods 4, and the inner ends of the reinforcing anchor rods 4 are fixedly connected to the floor beams and slabs 3 and correspond one to one. The reinforcing anchor rods 4 can make full use of the surrounding rock to enhance the horizontal support of the layer where the main hydraulic vibration source is located, thereby reducing the vibration of the layer. The outer wall of the powerhouse 1 is provided with random anchor rods 5.

[0022] Embodiment 2 of the present utility model: An underground powerhouse of a low-vibration pumped-storage power station comprises a powerhouse 1, which is entirely arranged in the underground surrounding rock. The powerhouse 1 is composed of walls on all sides and a vault on the top. An organic pier 2 is arranged in the middle of the inner cavity of the powerhouse 1, and a plurality of floor beams and slabs 3 are arranged between the organic pier 2 and the inner cavity side walls of the powerhouse 1. The floor beams and slabs 3 divide the interior of the powerhouse 1 into a generator layer, an intermediate layer, a turbine layer, a volute layer, and a tailwater pipe layer. The generator layer and the turbine layer have relatively large heights, and an intermediate layer is arranged between the generator layer and the turbine layer to further improve the overall horizontal stiffness of the structure of the powerhouse 1 and reduce the vibration of the powerhouse 1 itself. The outer wall of the powerhouse 1 is evenly provided with reinforcing anchor rods 4, and the inner ends of the reinforcing anchor rods 4 are fixedly connected to the floor beams and slabs 3 and correspond one to one. The reinforcing anchor rods 4 can make full use of the surrounding rock to enhance the horizontal support of the layer where the main hydraulic vibration source is located, thereby reducing the vibration of the layer. The outer wall of the powerhouse 1 is provided with random anchor rods 5.

[0023] The factory building 1 is composed of anchor sprayed concrete 6 and reinforced concrete layer 7, the reinforced concrete layer 7 is placed on the inner side of the anchor sprayed concrete 6, the random anchor rod 5 is arranged on the outer side of the anchor sprayed concrete 6, the thickness of the anchor sprayed concrete 6 is 10-15cm, the thickness of the reinforced concrete layer 7 is 85-95cm, and when the rock layer is excavated, the vault and wall of the factory building 1 are supported by anchor sprayed concrete 6 and fixed by random anchor rods 5 to ensure the stability of the rock around the factory building 1. The diameter of the random anchor rod 5 is 25mm, and the depth of penetration into the rock is 0.5-1m.

[0024] Embodiment 3 of the present utility model: An underground powerhouse of a low-vibration pumped-storage power station, comprising a powerhouse 1, which is entirely arranged in the underground surrounding rock, and is composed of walls on all sides and a vault on the top, and an organic pier 2 is arranged in the middle of the inner cavity of the powerhouse 1, and a plurality of floor beams 3 are arranged between the organic pier 2 and the inner cavity side walls of the powerhouse 1, and the floor beams 3 divide the interior of the powerhouse 1 into a generator layer, an intermediate layer, a turbine layer, a volute layer, and a tailwater pipe layer, and the generator layer and the turbine layer have relatively large layer heights, and an intermediate layer is arranged between the generator layer and the turbine layer, so as to further improve the overall structural water resistance of the powerhouse 1. Flat stiffness, reducing the vibration of the factory building 1 itself, the outer wall of the factory building 1 is evenly provided with reinforcing anchor rods 4, the inner ends of the reinforcing anchor rods 4 are fixedly connected to the floor beam slab 3 and correspond one to one, the diameter of the reinforcing anchor rods 4 is 25mm, the reinforcing anchor rods 4 are evenly arranged along the length direction of the factory building, the spacing between two adjacent reinforcing anchor rods 4 is 1m, the rock penetration depth is 1.5-2.5m, the reinforcing anchor rods 4 can make full use of the surrounding rocks, enhance the horizontal support of the layer where the main hydraulic vibration source is located, thereby reducing the vibration of the layer, the outer wall of the factory building 1 is provided with random anchor rods 5.

[0025] The floor beam slab 3 includes a support beam 9 and a floor slab 10. The support beam 9 is arranged between the machine pier 2 and the inner cavity side wall of the factory building 1. Multiple support beams 9 are crisscrossed to form a layered structure, and the support beams 9 are arranged in multiple layers. The floor slab 10 is fixedly laid on each layer of the support beams 9. A mixed flow reversible unit 11 is embedded and installed in the middle of the machine pier 2. A reserved seam 12 is arranged between the floor beam slabs 3 of two adjacent machine piers 2. The split seam method utilizes the increase in the stiffness of the support beam 9 to improve the horizontal stiffness of the floors around the machine pier 2, thereby strengthening the lateral support for the pier 2 and reducing vibration.

[0026] Embodiment 4 of the present utility model: An underground powerhouse of a low-vibration pumped-storage power station, comprising a powerhouse 1, which is entirely arranged in the underground surrounding rock, and is composed of surrounding walls and a top vault, and the surrounding side walls of the powerhouse 1 are provided with buttresses, and the height of the buttresses is 1.8-2.5m, and an organic pier 2 is arranged in the middle of the inner cavity of the powerhouse 1, and a plurality of floor beams 3 are arranged between the organic pier 2 and the inner cavity side walls of the powerhouse 1, and the floor beams 3 divide the interior of the powerhouse 1 into a generator layer, an intermediate layer, a turbine layer, a volute layer, and a tailwater pipe layer, and the generator layer and the turbine layer have relatively large layer heights, and a middle layer is arranged between the generator layer and the turbine layer. The interlayer further improves the overall horizontal stiffness of the structure of the factory building 1 and reduces the vibration of the factory building 1 itself. The outer wall of the factory building 1 is evenly provided with reinforcing anchor rods 4. The inner ends of the reinforcing anchor rods 4 are fixedly connected to the floor beams and slabs 3 and correspond one to one. The diameter of the reinforcing anchor rods 4 is 25 mm. The reinforcing anchor rods 4 are evenly arranged along the length direction of the factory building. The spacing between two adjacent reinforcing anchor rods 4 is 1 m, and the depth of rock penetration is 1.5-2.5 m. The reinforcing anchor rods 4 can make full use of the surrounding rocks to enhance the horizontal support of the layer where the main hydraulic vibration source is located, thereby reducing the vibration of the layer. The outer wall of the factory building 1 is provided with random anchor rods 5.

[0027] The factory building 1 is composed of anchor sprayed concrete 6 and reinforced concrete layer 7, the reinforced concrete layer 7 is placed on the inner side of the anchor sprayed concrete 6, the random anchor rod 5 is arranged on the outer side of the anchor sprayed concrete 6, the thickness of the anchor sprayed concrete 6 is 10-15cm, the thickness of the reinforced concrete layer 7 is 85-95cm, and when the rock layer is excavated, the vault and wall of the factory building 1 are supported by anchor sprayed concrete 6 and fixed by random anchor rods 5 to ensure the stability of the rock around the factory building 1. The diameter of the random anchor rod 5 is 25mm, and the depth of penetration into the rock is 0.5-1m.

[0028] The floor beam slab 3 includes a support beam 9 and a floor slab 10. The support beam 9 is arranged between the machine pier 2 and the inner cavity side wall of the factory building 1. Multiple support beams 9 are crisscrossed to form a layered structure, and the support beams 9 are arranged in multiple layers. The floor slab 10 is fixedly laid on each layer of the support beams 9. A mixed flow reversible unit 11 is embedded and installed in the middle of the machine pier 2. A reserved seam 12 is arranged between the floor beam slabs 3 of two adjacent machine piers 2. The split seam method utilizes the increase in the stiffness of the support beam 9 to improve the horizontal stiffness of the floors around the machine pier 2, thereby strengthening the lateral support for the pier 2 and reducing vibration.

[0029] Specifically, steps 8 are provided between adjacent floor beams 3 .

[0030] Specifically, a crane beam 13 is provided on the top of the inner cavity of the factory building 1 .

[0031] Embodiment 5 of the present utility model: An underground powerhouse of a low-vibration pumped-storage power station, comprising a powerhouse 1, which is entirely arranged in the underground surrounding rock, and is composed of surrounding walls and a top vault, and the surrounding side walls of the powerhouse 1 are provided with buttresses, and the height of the buttresses is 1.8m, and an organic pier 2 is arranged in the middle of the inner cavity of the powerhouse 1, and a plurality of floor beams 3 are arranged between the organic pier 2 and the inner cavity side walls of the powerhouse 1, and the floor beams 3 divide the interior of the powerhouse 1 into a generator layer, an intermediate layer, a turbine layer, a volute layer, and a tailwater pipe layer, and the generator layer and the turbine layer have relatively large layer heights, and a middle layer is arranged between the generator layer and the turbine layer. The interlayer further improves the overall horizontal stiffness of the structure of the factory building 1 and reduces the vibration of the factory building 1 itself. The outer wall of the factory building 1 is evenly provided with reinforcing anchor rods 4. The inner ends of the reinforcing anchor rods 4 are fixedly connected to the floor beams and slabs 3 and correspond one to one. The diameter of the reinforcing anchor rods 4 is 25 mm. The reinforcing anchor rods 4 are evenly arranged along the length direction of the factory building. The spacing between two adjacent reinforcing anchor rods 4 is 1 m, and the rock penetration depth is 1.5 m. The reinforcing anchor rods 4 can make full use of the surrounding rocks to enhance the horizontal support of the layer where the main hydraulic vibration source is located, thereby reducing the vibration of the layer. The outer wall of the factory building 1 is provided with random anchor rods 5.

[0032] The factory building 1 is composed of anchor sprayed concrete 6 and reinforced concrete layer 7, the reinforced concrete layer 7 is placed on the inner side of the anchor sprayed concrete 6, and the random anchor rod 5 is arranged on the outer side of the anchor sprayed concrete 6. The thickness of the anchor sprayed concrete 6 is 10 cm, and the thickness of the reinforced concrete layer 7 is 85 cm. When the rock layer is excavated, the vault and wall of the factory building 1 are supported by anchor sprayed concrete 6 and fixed by random anchor rods 5 to ensure the stability of the rock around the factory building 1. The diameter of the random anchor rod 5 is 25 mm, and the depth of penetration into the rock is 0.5 m.

[0033] The floor beam slab 3 includes a support beam 9 and a floor slab 10. The support beam 9 is arranged between the machine pier 2 and the inner cavity side wall of the factory building 1. Multiple support beams 9 are crisscrossed to form a layered structure, and the support beams 9 are arranged in multiple layers. The floor slab 10 is fixedly laid on each layer of the support beams 9. A mixed flow reversible unit 11 is embedded and installed in the middle of the machine pier 2. A reserved seam 12 is arranged between the floor beam slabs 3 of two adjacent machine piers 2. The split seam method utilizes the increase in the stiffness of the support beam 9 to improve the horizontal stiffness of the floors around the machine pier 2, thereby strengthening the lateral support for the pier 2 and reducing vibration.

[0034] Specifically, steps 8 are provided between adjacent floor beams 3 .

[0035] Specifically, a crane beam 13 is provided on the top of the inner cavity of the factory building 1 .

[0036] Embodiment 6 of the present utility model: An underground powerhouse of a low-vibration pumped-storage power station, comprising a powerhouse 1, which is entirely arranged in the underground surrounding rock, and is composed of walls on all sides and a vault on the top, and the side walls on all sides of the powerhouse 1 are provided with buttresses, and the height of the buttresses is 2.5m, and an organic pier 2 is arranged in the middle of the inner cavity of the powerhouse 1, and a plurality of floor beams 3 are arranged between the organic pier 2 and the side walls of the inner cavity of the powerhouse 1, and the floor beams 3 divide the interior of the powerhouse 1 into a generator layer, an intermediate layer, a turbine layer, a volute layer, and a tailwater pipe layer, and the generator layer and the turbine layer have relatively large heights, and a middle layer is arranged between the generator layer and the turbine layer. The interlayer further improves the overall horizontal stiffness of the structure of the factory building 1 and reduces the vibration of the factory building 1 itself. The outer wall of the factory building 1 is evenly provided with reinforcing anchor rods 4. The inner ends of the reinforcing anchor rods 4 are fixedly connected to the floor beams and slabs 3 and correspond one to one. The diameter of the reinforcing anchor rods 4 is 25 mm. The reinforcing anchor rods 4 are evenly arranged along the length direction of the factory building. The spacing between two adjacent reinforcing anchor rods 4 is 1 m, and the rock penetration depth is 2.5 m. The reinforcing anchor rods 4 can make full use of the surrounding rocks to enhance the horizontal support of the layer where the main hydraulic vibration source is located, thereby reducing the vibration of the layer. The outer wall of the factory building 1 is provided with random anchor rods 5.

[0037] The factory building 1 is composed of anchor sprayed concrete 6 and reinforced concrete layer 7, the reinforced concrete layer 7 is placed on the inner side of the anchor sprayed concrete 6, and the random anchor rod 5 is arranged on the outer side of the anchor sprayed concrete 6. The thickness of the anchor sprayed concrete 6 is 15 cm, and the thickness of the reinforced concrete layer 7 is 95 cm. When the rock layer is excavated, the vault and wall of the factory building 1 are supported by anchor sprayed concrete 6 and fixed by random anchor rods 5 to ensure the stability of the rock around the factory building 1. The diameter of the random anchor rod 5 is 25 mm, and the depth of penetration into the rock is 1 m.

[0038] The floor beam slab 3 includes a support beam 9 and a floor slab 10. The support beam 9 is arranged between the machine pier 2 and the inner cavity side wall of the factory building 1. Multiple support beams 9 are crisscrossed to form a layered structure, and the support beams 9 are arranged in multiple layers. The floor slab 10 is fixedly laid on each layer of the support beams 9. A mixed flow reversible unit 11 is embedded and installed in the middle of the machine pier 2. A reserved seam 12 is arranged between the floor beam slabs 3 of two adjacent machine piers 2. The split seam method utilizes the increase in the stiffness of the support beam 9 to improve the horizontal stiffness of the floors around the machine pier 2, thereby strengthening the lateral support for the pier 2 and reducing vibration.

[0039] Specifically, steps 8 are provided between adjacent floor beams 3 .

[0040] Specifically, a crane beam 13 is provided on the top of the inner cavity of the factory building 1 .

[0041] Embodiment 7 of the present utility model: An underground powerhouse of a low-vibration pumped-storage power station, comprising a powerhouse 1, which is entirely arranged in the underground surrounding rock, and is composed of walls on all sides and a vault on the top, and buttresses are arranged on the side walls on all sides of the powerhouse 1, and the buttresses are 2.2 m high, and an engine pier 2 is arranged in the middle of the inner cavity of the powerhouse 1, and a plurality of floor beams 3 are arranged between the engine pier 2 and the side walls of the inner cavity of the powerhouse 1, and the floor beams 3 divide the interior of the powerhouse 1 into a generator layer, an intermediate layer, a turbine layer, a volute layer, and a tailwater pipe layer, and the generator layer and the turbine layer have relatively large heights, and a middle layer is arranged between the generator layer and the turbine layer. The interlayer further improves the overall horizontal stiffness of the structure of the factory building 1 and reduces the vibration of the factory building 1 itself. The outer wall of the factory building 1 is evenly provided with reinforcing anchor rods 4. The inner ends of the reinforcing anchor rods 4 are fixedly connected to the floor beams and slabs 3 and correspond one to one. The diameter of the reinforcing anchor rods 4 is 25 mm. The reinforcing anchor rods 4 are evenly arranged along the length direction of the factory building. The spacing between two adjacent reinforcing anchor rods 4 is 1 m, and the rock penetration depth is 2.0 m. The reinforcing anchor rods 4 can make full use of the surrounding rocks to enhance the horizontal support of the layer where the main hydraulic vibration source is located, thereby reducing the vibration of the layer. The outer wall of the factory building 1 is provided with random anchor rods 5.

[0042] The factory building 1 is composed of anchor sprayed concrete 6 and reinforced concrete layer 7, the reinforced concrete layer 7 is placed on the inner side of the anchor sprayed concrete 6, the random anchor rod 5 is arranged on the outer side of the anchor sprayed concrete 6, the thickness of the anchor sprayed concrete 6 is 13 cm, the thickness of the reinforced concrete layer 7 is 90 cm, and when the rock layer is excavated, the vault and wall of the factory building 1 are supported by anchor sprayed concrete 6 and fixed by random anchor rods 5 to ensure the stability of the rock around the factory building 1. The diameter of the random anchor rod 5 is 25 mm, and the depth of penetration into the rock is 0.7 m.

[0043] The floor beam slab 3 includes a support beam 9 and a floor slab 10. The support beam 9 is arranged between the machine pier 2 and the inner cavity side wall of the factory building 1. Multiple support beams 9 are crisscrossed to form a layered structure, and the support beams 9 are arranged in multiple layers. The floor slab 10 is fixedly laid on each layer of the support beams 9. A mixed flow reversible unit 11 is embedded and installed in the middle of the machine pier 2. A reserved gap 12 is arranged between the floor beam slabs 3 of two adjacent machine piers 2. The increase in the stiffness of the support beam 9 improves the horizontal stiffness of the floors around the machine pier 2, thereby strengthening the lateral support for the pier 2 and reducing vibration.

[0044] Specifically, steps 8 are provided between adjacent floor beams 3 .

[0045] Specifically, a crane beam 13 is provided on the top of the inner cavity of the factory building 1 .

[0046] The working principle of an embodiment of the utility model: when the rock layer is excavated, the arch and wall of the powerhouse 1 are supported by anchor sprayed concrete 6 and fixed by random anchor rods 5 to ensure the stability of the rock around the powerhouse 1. For multiple units, the underground powerhouse 1 adopts the "one machine one seam" structure. Through this seam method, the increase in the rigidity of the support beam 9 is used to improve the horizontal rigidity of the floors around the machine pier 2, thereby strengthening the lateral support of the pier 2 and reducing vibration; the generator layer and the turbine layer have relatively large heights, and the two An intermediate layer is arranged between them to further improve the overall horizontal stiffness of the structure of the factory building 1 and reduce the vibration of the factory building 1 itself; reinforcing anchor rods 4 are evenly arranged on the outside of the floor beams and slabs 3 to make full use of the surrounding rocks and enhance the horizontal support for the layer where the main hydraulic vibration source is located, thereby reducing the vibration of the layer; buttresses are arranged around the factory building 1, and the stiffness of the buttresses is utilized to reduce the thickness of the side walls, and a stable frame system is formed by connecting the buttresses with the support beams 9 of each floor, thereby enhancing the overall stability of the structure of the factory building 1 and reducing the vibration of the factory building 1.

Claims

1. A low-vibration pumped storage power station underground powerhouse, characterized in that: The invention comprises a factory building (1), wherein a machine pier (2) is arranged in the middle of the inner cavity of the factory building (1), a plurality of floor beams (3) are arranged between the machine pier (2) and the inner cavity side wall of the factory building (1), and the outer wall of the factory building (1) is evenly provided with reinforcing anchor rods (4), the inner ends of the reinforcing anchor rods (4) are fixedly connected to the floor beams (3) and correspond one to one, and the outer wall of the factory building (1) is provided with random anchor rods (5).

2. The low-vibration pumped storage power station underground powerhouse according to claim 1, characterized in that: The factory building (1) is composed of anchor sprayed concrete (6) and a reinforced concrete layer (7), wherein the reinforced concrete layer (7) is placed inside the anchor sprayed concrete (6), and the random anchor rods (5) are arranged outside the anchor sprayed concrete (6).

3. The low-vibration pumped storage power station underground powerhouse according to claim 1, characterized in that: A staircase (8) is provided between adjacent floor beams (3).

4. The low-vibration pumped storage power station underground powerhouse according to claim 1, characterized in that: The floor beam slab (3) comprises a support beam (9) and a floor slab (10); the support beam (9) is arranged between the machine pier (2) and the inner cavity side wall of the factory building (1); a plurality of the support beams (9) are arranged in a crisscross pattern to form a layered structure; and the support beams (9) are arranged in multiple layers, and a floor slab (10) is fixedly laid on each layer of the support beams (9).

5. The low-vibration pumped storage power station underground powerhouse according to claim 1, characterized in that: A mixed flow reversible machine unit (11) is embedded and installed in the middle of the machine pier (2), and a reserved seam (12) is provided between the floor beams (3) of two adjacent machine piers (2).

6. The low-vibration pumped storage power station underground powerhouse according to claim 1, characterized in that: A crane beam (13) is provided at the top of the inner cavity of the factory building (1).

7. The low-vibration pumped storage power station underground powerhouse according to claim 2, characterized in that: The anchor sprayed concrete (6) has a thickness of 10-15 cm, and the reinforced concrete layer (7) has a thickness of 85-95 cm.

8. The low-vibration pumped storage power station underground powerhouse according to claim 1, characterized in that: The side walls of the factory building (1) are provided with buttresses, and the height of the buttresses is 1.8-2.5m.

9. The low-vibration pumped storage power station underground powerhouse according to claim 1, characterized in that: The diameter of the reinforcing anchor rod (4) is 25 mm. The reinforcing anchor rod (4) is evenly arranged along the length direction of the factory building. The distance between two adjacent reinforcing anchor rods (4) is 1 m, and the depth of penetration into the rock is 1.5-2.5 m.

10. The low-vibration pumped storage power station underground powerhouse according to claim 1, characterized in that: The random anchor rod (5) has a diameter of 25 mm and a rock penetration depth of 0.5-1 m.

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