Hydropower station hub arrangement structure

Abstract

The utility model provides a hydropower station hub arrangement structure, which is characterized in that a dam type main power house, a left guide wall, a left bank sand washing and flood discharging gate, a right guide wall, a right bank sand washing and flood discharging gate and a right bank non-overflow dam section are sequentially arranged above a main river channel between a river left bank and a river right bank along the width direction of the main river channel in the direction from the river left bank to the river right bank. The integrated dam structure has the advantages that the dam type main power house, the left guide wall, the left bank sand washing and flood discharging gate, the right guide wall, the right bank sand washing and flood discharging gate, the right bank non-overflow dam section, the upstream water inlet structure and the downstream tail water structure are of an integrated structure, and the structural strength, the sliding resistance, the inclination resistance, the floating resistance and other performance of the integrated dam structure are obviously superior to those of a conventional dam structure; the device is suitable for large and medium rivers with large flood flow; the main power house is a dam type main power house and is directly arranged above the main river channel, the dam function and the power generation function of the power house are achieved at the same time, shore land resources do not need to be occupied, the excavated volume and the concrete use amount can be greatly saved, and the construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydropower engineering, in particular to a hub layout structure of a hydropower station. Background Art

[0002] Hydropower projects are complex projects with a relatively long construction period and require a large amount of construction funds. In current engineering practice, the dam is located in a narrow section of the river valley, and the powerhouse adopts a bank-side powerhouse or a dam-behind powerhouse. The bank-side powerhouse is a ground powerhouse located on the river bank downstream of the dam, and the powerhouse is arranged close to the dam. The dam-behind powerhouse is located on the ground downstream of the dam and is arranged close to the dam.

[0003] The structures of bank-side and dam-behind plant buildings have layout limitations. They are difficult to arrange for dam sites with large flood discharge and narrow riverbed, and require the expansion of river banks on both sides, which increases construction costs. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides a hub layout structure of a hydropower station, which can effectively solve the above problems.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The utility model provides a hydropower station hub layout structure, wherein above the main river channel between the left bank (15) and the right bank (16) of the river, along the width direction of the main river channel, in the direction from the left bank (15) of the river to the right bank of the river, a dam-type main powerhouse (1), a left guide wall (2), a left bank sand flushing and flood discharge gate (3), a right guide wall (4), a right bank sand flushing and flood discharge gate (5) and a right bank non-overflow dam section (6) are sequentially arranged;

[0007] The dam-type main powerhouse (1), the left guide wall (2), the left bank sand flushing and flood discharge gate (3), the right guide wall (4), the right bank sand flushing and flood discharge gate (5) and the right bank non-overflow dam section (6) are sequentially connected and fixed to form an integrated dam structure.

[0008] Preferably, the left guide wall (2) is located between the dam-type main powerhouse (1) and the left bank sand flushing and flood discharge gate (3), and is both the left pier of the left bank sand flushing and flood discharge gate (3) and the right wall of the dam-type main powerhouse (1). The left guide wall (2) includes a left guide wall lower extension section (2-1) located on the downstream side of the dam.

[0009] Preferably, the right guide wall (4) is longitudinally arranged between the left bank sand flushing and flood discharge gate (3) and the right bank sand flushing and flood discharge gate (5), and comprises, from upstream to downstream, an upstream section (4-1), a dam body section (4-2), a stilling basin section (4-3) and a downstream section (4-4).

[0010] Preferably, the left bank sand flushing flood discharge gate (3) comprises a plurality of left bank flood discharge gate holes arranged along the width direction of the main river channel; the right bank sand flushing flood discharge gate (5) comprises a plurality of right bank flood discharge gate holes arranged along the width direction of the main river channel;

[0011] A vertical ship lift (11) is arranged longitudinally in a direction coaxial with a right bank flood discharge gate hole. Therefore, the vertical ship lift (11) is arranged longitudinally in the main river channel and comprises, from upstream to downstream, an upstream navigation pier (11-1), an upstream ship receiving chamber (11-2), a downstream ship receiving chamber (11-3) and a downstream navigation pier (11-4).

[0012] Preferably, energy dissipation pools (10) are arranged on the downstream sides of the left bank sand flushing and flood discharge gate (3) and the right bank sand flushing and flood discharge gate (5).

[0013] Preferably, the dam-type main powerhouse (1) is a dam-type main powerhouse with both power generation and water retaining functions, wherein the upstream and downstream surfaces are poured with concrete to form a dam body, and a main powerhouse structure with an open top is formed between the upstream and downstream concrete surfaces;

[0014] The dam-type main plant (1) comprises a loading and unloading room (1-1), an installation room (1-2) and a main engine room (1-3); wherein the loading and unloading room (1-1) is arranged close to the left bank (15) of the river; the installation room (1-2) is arranged on a side of the loading and unloading room (1-1) away from the left bank (15) of the river; and the main engine room (1-3) is arranged on a side of the installation room (1-2) away from the left bank (15) of the river.

[0015] Preferably, an upstream water inlet structure (7) is provided on the upstream side of the dam-type main powerhouse (1); and a downstream tailwater structure (8) is provided on the downstream side of the dam-type main powerhouse (1);

[0016] The dam-type main powerhouse (1), the upstream water inlet structure (7) and the downstream tailwater structure (8) are integrated into a single body to form a water retaining structure.

[0017] Preferably, the upstream water inlet structure (7) comprises an upstream water retaining wall (7-1), a sand barrier (7-2) and a trash rack reservoir (7-3);

[0018] The downstream tailwater structure (8) comprises a tailwater auxiliary plant (8-1), a tailwater retaining wall (8-2) and a tailwater channel (8-3);

[0019] The upstream water retaining wall (7-1) is located on the upstream side of the main engine room (1-3); the tailwater auxiliary plant (8-1) is located on the downstream side of the main engine room (1-3); the tailwater retaining wall (8-2) is located on the downstream side of the tailwater auxiliary plant (8-1); the tailwater channel (8-3) is located on the downstream side of the tailwater retaining wall (8-2); the upstream water retaining wall (7-1), the main engine room (1-3), the tailwater auxiliary plant (8-1), the tailwater retaining wall (8-2) and the tailwater channel (8-3) form an integrated structure.

[0020] Preferably, a central control building (12) is arranged adjacent to the right side of the main engine room (1-3);

[0021] A GIS switch building (13) is arranged on the downstream side of the loading and unloading room (1-1), close to the bank of the left bank (15) of the river, and perpendicular to the longitudinal axis direction of the dam-type main powerhouse (1).

[0022] Preferably, a left bank fishway (9) is arranged along the water flow direction at the downstream side of the dam-type main powerhouse (1) and close to the left bank (15) of the river; the left bank fishway (9) has a fish attracting system (9-1);

[0023] A grouting drainage gallery (14) is arranged at the bottom of the dam-type main powerhouse (1), the left guide wall (2), the left bank sand flushing and flood discharge gate (3), the right guide wall (4), the right bank sand flushing and flood discharge gate (5) and the right bank non-overflow dam section (6).

[0024] The hydropower station hub layout structure provided by the utility model has the following advantages:

[0025] 1. The dam-type main powerhouse, left guide wall, left bank sand flushing and flood discharge gate, right guide wall, right bank sand flushing and flood discharge gate, right bank non-overflow dam section, upstream water intake structure and downstream tailwater structure are integrated structures. Their structural strength, anti-slip, anti-tilting and anti-floating properties are significantly better than those of conventional dam structures. Therefore, they can be applied to large and medium-sized rivers with large flood flows.

[0026] 2. The main plant of the present invention adopts a dam-type main plant, which is directly arranged above the main river channel. It has both dam function and power generation function. Compared with conventional shore-type plants or dam-behind plants, this structure has the following advantages: 1) The dam-type main plant of the present invention does not need to occupy shore land resources, so it is very suitable for river channel layout with limited shore width; 2) The present invention does not need to expand the river banks on both sides, thereby reducing construction costs; 3) Since the dam and the main plant are integrated, the excavation volume and concrete consumption can be greatly saved, thereby reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A structural diagram of a hydropower station hub layout structure provided by the utility model;

[0028] Figure 2 yes Figure 1 Elevation view of the middle and upper reaches;

[0029] Figure 3 yes Figure 1 Elevation view of the middle and lower reaches;

[0030] Figure 4 It is a cross-sectional view of the arrangement position of the vertical ship lift;

[0031] Figure 5 It is a cross-sectional view between hosts;

[0032] Figure 6 This is a cross-sectional view corresponding to the location of the fifth left bank flood discharge gate hole;

[0033] in:

[0034] 1. Dam-type main plant; 1-1. Loading and unloading room; 1-2. Installation room; 1-3. Main engine room;

[0035] 2. Left guide wall; 2-1. Lower extension of left guide wall;

[0036] 3. Left bank flood discharge gate; 3-1. First left bank flood discharge gate hole; 3-2. Second left bank flood discharge gate hole; 3-3. Third left bank flood discharge gate hole; 3-4. Fourth left bank flood discharge gate hole; 3-5. Fifth left bank flood discharge gate hole;

[0037] 4. Right guide wall; 4-1. Upstream section; 4-2. Dam section; 4-3. Stilling basin section; 4-4. Downstream section;

[0038] 5. Right bank flood discharge gate; 5-1. First right bank flood discharge gate hole; 5-2. Second right bank flood discharge gate hole; 5-3. Third right bank flood discharge gate hole; 5-4. Fourth right bank flood discharge gate hole; 5-5. Fifth right bank flood discharge gate hole; 5-6. Sixth right bank flood discharge gate hole; 5-7. Seventh right bank flood discharge gate hole;

[0039] 6. Non-overflow dam section on the right bank;

[0040] 7. Upstream water inlet structure; 7-1. Upstream water retaining wall; 7-2. Sand barrier; 7-3. Trash rack reservoir;

[0041] 8. Downstream tailwater structure; 8-1. Tailwater auxiliary powerhouse; 8-2. Tailwater retaining wall; 8-3. Tailwater channel;

[0042] 9. Left bank fishway; 9-1. Fish attracting system;

[0043] 10. Stilling basin;

[0044] 11. Vertical ship lift; 11-1. Upstream navigation pier; 11-2. Upstream ship carriage; 11-3. Downstream ship carriage; 11-4. Downstream navigation pier;

[0045] 12. Central control building; 13. GIS switch building; 14. Grouting drainage corridor; 15. Left bank of the river; 16. Right bank of the river. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0047] The utility model provides a hub layout structure of a hydropower station, whose structural strength, anti-slip, anti-tilt, anti-floating and other properties meet the requirements of dam operation, and at the same time, effectively reduce the occupation of river bank land, and is very suitable for the layout of rivers with limited bank width; it is also conducive to the layout of flood discharge buildings, convenient for the operation and management of the hub of the hydropower station, conducive to the protection of the ecological environment, and has the advantages of good economy and easy construction implementation.

[0048] See also Figure 1 to Figure 6 The utility model provides a hub layout structure of a hydropower station. Above the main river channel between the left bank 15 and the right bank 16 of the river, along the width direction of the main river channel, from the left bank 15 of the river to the right bank of the river, a dam-type main powerhouse 1, a left guide wall 2, a left bank sand flushing and flood discharge gate 3, a right guide wall 4, a right bank sand flushing and flood discharge gate 5 and a right bank non-overflow dam section 6 are sequentially arranged;

[0049] The dam-type main powerhouse 1, the left guide wall 2, the left bank sand flushing and flood discharge gate 3, the right guide wall 4, the right bank sand flushing and flood discharge gate 5 and the right bank non-overflow dam section 6 are sequentially connected and fixed to form an integrated dam structure.

[0050] In the utility model, the left guide wall 2 is located between the dam-type main powerhouse 1 and the left bank sand flushing and flood discharge gate 3, and the dam axis length is not less than 30m. It is both the left pier of the left bank sand flushing and flood discharge gate 3 and the right wall of the dam-type main powerhouse 1. The left guide wall 2 includes a left guide wall lower extension section 2-1 located on the downstream side of the dam.

[0051] The right guide wall 4 is longitudinally arranged between the left bank sand flushing and flood discharge gate 3 and the right bank sand flushing and flood discharge gate 5, and comprises an upstream section 4-1, a dam body section 4-2, a stilling basin section 4-3 and a downstream section 4-4 in order from upstream to downstream.

[0052] In the utility model, the left bank sand flushing flood discharge gate 3 includes a plurality of left bank flood discharge gate holes arranged along the width direction of the main river channel. As an example, a total of 5 left bank flood discharge gate holes are set, namely: a first left bank flood discharge gate hole 3-1, a second left bank flood discharge gate hole 3-2, a third left bank flood discharge gate hole 3-3, a fourth left bank flood discharge gate hole 3-4 and a fifth left bank flood discharge gate hole 3-5; the right bank sand flushing flood discharge gate 5 includes a plurality of right bank flood discharge gate holes arranged along the width direction of the main river channel. As an example, a total of 5 right bank flood discharge gate holes are set, namely: a first right bank flood discharge gate hole 5-1, a second right bank flood discharge gate hole 5-2, a third right bank flood discharge gate hole 5-3, a fourth right bank flood discharge gate hole 5-4, a fifth right bank flood discharge gate hole 5-5, a sixth right bank flood discharge gate hole 5-6 and a seventh right bank flood discharge gate hole 5-7;

[0053] The left bank sand flushing flood discharge gate 3 is basically level with the original riverbed surface, and the weir type is an open low practical weir. The net width of each hole is not less than 14m, with a slit in the weir, and the gate pier thickness is not less than 5m. The arc gate is used to control the water flow. Due to the large thrust of the arc gate, prestressed gate piers are used. The downstream adopts bottom flow energy dissipation and digs a deep energy dissipation pool.

[0054] In the direction coaxial with a right bank flood discharge gate hole, a vertical ship lift 11 is arranged longitudinally. For example, the right bank sand flushing flood discharge gate 5 is the same as the left bank sand flushing flood discharge gate 3, and the vertical ship lift 11 is arranged at the overlapped position of the second right bank flood discharge gate hole 5-2. The vertical ship lift 11 uses a gantry crane to lift ships across the dam. The vertical ship lift 11 is arranged longitudinally in the main river channel, from upstream to downstream, referring to Figure 4 , which includes an upstream navigation pier 11-1, an upstream ship-carrying chamber 11-2, a downstream ship-carrying chamber 11-3 and a downstream navigation pier 11-4 in sequence.

[0055] See also Figure 6 At the downstream side of the left bank sand flushing and flood discharge gate 3 and the right bank sand flushing and flood discharge gate 5, energy dissipation pools 10 are arranged. The bottom plate thickness is not less than 2.5m.

[0056] The right bank non-overflow dam section 6 is a gravity dam section, connected to the right bank of the river 16. The basic cross section of the dam body is a triangle, with a vertical upstream face and a downstream slope of 1:0.65.

[0057] In the utility model, the dam-type main powerhouse 1 is a dam-type main powerhouse with both power generation and water retaining functions. Concrete is poured on the upstream and downstream surfaces to form a dam body, and a main powerhouse structure with an open top is formed between the upstream and downstream concrete surfaces.

[0058] The dam-type main powerhouse 1 includes a loading and unloading room 1-1, an installation room 1-2 and a main engine room 1-3; the loading and unloading room 1-1 is arranged near the left bank 15 of the river and connected to the left bank road 15, so that the main equipment can be directly transported to the loading and unloading room. The installation room 1-2 is arranged on the side of the loading and unloading room 1-1 away from the left bank 15 of the river; the main engine room 1-3 is arranged on the side of the installation room 1-2 away from the left bank 15 of the river.

[0059] An upstream water inlet structure 7 is arranged on the upstream side of the dam-type main powerhouse 1; a downstream tailwater structure 8 is arranged on the downstream side of the dam-type main powerhouse 1; the dam-type main powerhouse 1, the upstream water inlet structure 7 and the downstream tailwater structure 8 are integrated into one to form a water retaining structure.

[0060] The upstream water inlet structure 7 includes an upstream water retaining wall 7-1, a sand barrier 7-2 and a trash rack reservoir 7-3; the downstream tailwater structure 8 includes a tailwater auxiliary powerhouse 8-1, a tailwater retaining wall 8-2 and a tailwater channel 8-3;

[0061] See also Figure 5 The upstream retaining wall 7-1 is located on the upstream side of the main engine room 1-3; the tailwater auxiliary powerhouse 8-1 is located on the downstream side of the tailwater auxiliary powerhouse 8-1; the tailwater retaining wall 8-2 is located on the downstream side of the tailwater auxiliary powerhouse 8-1; the tailwater channel 8-3 is located on the downstream side of the tailwater retaining wall 8-2, and the tailwater channel 8-3 is connected to the downstream riverbed with a reverse slope of 1:5; the upstream retaining wall 7-1, the main engine room 1-3, the tailwater auxiliary powerhouse 8-1, the tailwater retaining wall 8-2 and the tailwater channel 8-3 form an integrated structure.

[0062] In the present invention, the central control building 12 is arranged adjacent to the right side of the main engine room 1-3; the main engine room 1-3 and the central control building 12 are arranged in a compact manner to meet the work requirements of office and operation personnel.

[0063] On the downstream side of the loading and unloading room 1-1, near the bank of the left bank 15 of the river, perpendicular to the longitudinal axis direction of the dam-type main powerhouse 1, a GIS switch building 13 is set. Specifically, the roof of the GIS switch building 13 is a 330kV outgoing line field, and the outgoing line field on the roof is arranged with outgoing line bushings, zinc oxide lightning arresters, capacitive voltage transformers, etc. to improve safety in use.

[0064] On the downstream side of the dam-type main powerhouse 1 and near the left bank 15 of the river, a left bank fishway 9 is arranged along the water flow direction; the left bank fishway 9 has a fish attracting system 9-1; the left bank fishway 9 adopts a vertical slit fishway; the pier head arrangement of the vertical slit guide partition of the fishway adopts a streamlined pier head arrangement. By setting up the fishway project, the dam barrier can avoid the damage to the continuity and integrity of the original water ecosystem.

[0065] A grouting drainage gallery 14 is arranged at the bottom of the dam-type main powerhouse 1, the left guide wall 2, the left bank sand flushing and flood discharge gate 3, the right guide wall 4, the right bank sand flushing and flood discharge gate 5 and the right bank non-overflow dam section 6.

[0066] The utility model provides a hydropower station hub layout structure, which has the following advantages:

[0067] 1. The dam-type main powerhouse, left guide wall, left bank sand flushing and flood discharge gate, right guide wall, right bank sand flushing and flood discharge gate, right bank non-overflow dam section, upstream water intake structure and downstream tailwater structure are integrated structures. Their structural strength, anti-slip, anti-tilting and anti-floating properties are significantly better than those of conventional dam structures. Therefore, they can be applied to large and medium-sized rivers with large flood flows.

[0068] 2. The main plant of the present invention adopts a dam-type main plant, which is directly arranged above the main river channel. It has both dam function and power generation function. Compared with conventional shore-type plants or dam-behind plants, this structure has the following advantages: 1) The dam-type main plant of the present invention does not need to occupy shore land resources, so it is very suitable for river channel layout with limited shore width; 2) The present invention does not need to expand the river banks on both sides, thereby reducing construction costs; 3) Since the dam and the main plant are integrated, the excavation volume and concrete consumption can be greatly saved, thereby reducing construction costs.

[0069] 3. The left bank sand flushing flood gate and the right bank sand flushing flood gate have flood discharge holes that can discharge both flood water and sand, thus meeting the flood discharge and sand discharge functions of the dam hub and reducing reservoir flooding losses.

[0070] 4. The vertical ship lift is arranged overlappingly with the flood discharge gate hole of the right bank sand flushing flood discharge gate, and the vertical ship lift is arranged longitudinally above the river channel instead of on the bank. Therefore, it does not need to occupy the land resources on the bank, further saving the occupation of the land resources on the bank, and is suitable for the river channel layout with limited bank width;

[0071] 5. By setting up a fishway on the downstream side of the dam-type main powerhouse, the fishway project restored the river connectivity, met the fish migration needs and promoted the genetic exchange of fish upstream and downstream of the dam site, successfully solving the problem of ecological and environmental balance.

[0072] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A hydropower station hub layout structure, characterized in that: Above the main river channel between the left bank (15) and the right bank (16) of the river, along the width direction of the main river channel, in the direction from the left bank (15) of the river to the right bank of the river, a dam-type main powerhouse (1), a left guide wall (2), a left bank sand flushing and flood discharge gate (3), a right guide wall (4), a right bank sand flushing and flood discharge gate (5) and a right bank non-overflow dam section (6) are sequentially arranged; The dam-type main powerhouse (1), the left guide wall (2), the left bank sand flushing and flood discharge gate (3), the right guide wall (4), the right bank sand flushing and flood discharge gate (5) and the right bank non-overflow dam section (6) are sequentially connected and fixed to form an integrated dam structure.

2. A hydropower station hub layout structure according to claim 1, characterized in that: The left guide wall (2) is located between the dam-type main powerhouse (1) and the left bank sand flushing and flood discharge gate (3), and is both the left pier of the left bank sand flushing and flood discharge gate (3) and the right wall of the dam-type main powerhouse (1). The left guide wall (2) includes a left guide wall lower extension section (2-1) located at the downstream side of the dam.

3. A hydropower station hub layout structure according to claim 1, characterized in that: The right guide wall (4) is longitudinally arranged between the left bank sand flushing and flood discharge gate (3) and the right bank sand flushing and flood discharge gate (5), and comprises, from upstream to downstream, an upstream section (4-1), a dam body section (4-2), a stilling basin section (4-3) and a downstream section (4-4).

4. A hydropower station hub layout structure according to claim 1, characterized in that: The left bank sand flushing flood discharge gate (3) comprises a plurality of left bank flood discharge gate holes arranged along the width direction of the main river channel; the right bank sand flushing flood discharge gate (5) comprises a plurality of right bank flood discharge gate holes arranged along the width direction of the main river channel; A vertical ship lift (11) is arranged longitudinally in a direction coaxial with a right bank flood discharge gate hole. Therefore, the vertical ship lift (11) is arranged longitudinally in the main river channel and comprises, from upstream to downstream, an upstream navigation pier (11-1), an upstream ship receiving chamber (11-2), a downstream ship receiving chamber (11-3) and a downstream navigation pier (11-4).

5. A hydropower station hub layout structure according to claim 1, characterized in that: Energy dissipation pools (10) are arranged on the downstream sides of the left bank sand flushing and flood discharge gate (3) and the right bank sand flushing and flood discharge gate (5).

6. A hydropower station hub layout structure according to claim 1, characterized in that: The dam-type main powerhouse (1) is a dam-type main powerhouse with both power generation and water retaining functions. Concrete is poured on the upstream and downstream surfaces to form a dam body, and a main powerhouse structure with an open top is formed between the upstream and downstream concrete surfaces. The dam-type main plant (1) comprises a loading and unloading room (1-1), an installation room (1-2) and a main engine room (1-3); wherein the loading and unloading room (1-1) is arranged close to the left bank (15) of the river; the installation room (1-2) is arranged on a side of the loading and unloading room (1-1) away from the left bank (15) of the river; and the main engine room (1-3) is arranged on a side of the installation room (1-2) away from the left bank (15) of the river.

7. A hydropower station hub layout structure according to claim 6, characterized in that: An upstream water inlet structure (7) is arranged on the upstream side of the dam-type main powerhouse (1); a downstream tailwater structure (8) is arranged on the downstream side of the dam-type main powerhouse (1); The dam-type main powerhouse (1), the upstream water inlet structure (7) and the downstream tailwater structure (8) are integrated into a single body to form a water retaining structure.

8. A hydropower station hub layout structure according to claim 7, characterized in that: The upstream water inlet structure (7) comprises an upstream water retaining wall (7-1), a sand barrier (7-2) and a trash rack reservoir (7-3); The downstream tailwater structure (8) comprises a tailwater auxiliary plant (8-1), a tailwater retaining wall (8-2) and a tailwater channel (8-3); The upstream water retaining wall (7-1) is located on the upstream side of the main engine room (1-3); the tailwater auxiliary plant (8-1) is located on the downstream side of the main engine room (1-3); the tailwater retaining wall (8-2) is located on the downstream side of the tailwater auxiliary plant (8-1); the tailwater channel (8-3) is located on the downstream side of the tailwater retaining wall (8-2); the upstream water retaining wall (7-1), the main engine room (1-3), the tailwater auxiliary plant (8-1), the tailwater retaining wall (8-2) and the tailwater channel (8-3) form an integrated structure.

9. A hydropower station hub layout structure according to claim 6, characterized in that: A central control building (12) is arranged adjacent to the right side of the main engine room (1-3); A GIS switch building (13) is arranged on the downstream side of the loading and unloading room (1-1), close to the bank of the left bank (15) of the river, and perpendicular to the longitudinal axis direction of the dam-type main powerhouse (1).

10. A hydropower station hub layout structure according to claim 1, characterized in that: A left bank fishway (9) is arranged along the water flow direction at the downstream side of the dam-type main powerhouse (1) and close to the left bank (15) of the river; the left bank fishway (9) has a fish attracting system (9-1); A grouting drainage gallery (14) is arranged at the bottom of the dam-type main powerhouse (1), the left guide wall (2), the left bank sand flushing and flood discharge gate (3), the right guide wall (4), the right bank sand flushing and flood discharge gate (5) and the right bank non-overflow dam section (6).

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