Vertical traffic construction method for upper and lower reservoirs of pumped storage power station

Abstract

The invention relates to the technical field of pumped storage power generation, in particular to a vertical traffic construction method for upper and lower reservoirs of a pumped storage power station. The method comprises the following steps: building surrounding reservoir roads on the peripheries of an upper reservoir and a lower reservoir which are planned to be built correspondingly; connecting an external traffic road with a regional arterial highway and the surrounding reservoir roads of the lower reservoir; building a plant ventilation and safety hole to be connected with the external traffic road; a horizontal tunnel is built at the other end of the plant ventilation and safety hole and connected with the bottom end of the transportation vertical shaft, and a ground open line road is built at an outlet of the top of the transportation vertical shaft and connected with an upper warehouse surrounding road. By providing a composite arrangement mode of the horizontal tunnel, the transportation vertical shaft and the ground open line road, a new path is opened up for the traffic between the upper reservoir and the lower reservoir of the pumped storage power station, the traffic layout can be optimized, the limitation of basic farmland and ecological red lines can be avoided, and the transportation efficiency and the engineering adaptability can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pumped - storage power generation, and particularly to a method for constructing vertical transportation between the upper and lower reservoirs of a pumped - storage power station. Background Technique

[0002] Most of the existing transportation methods between the upper and lower reservoirs of pumped - storage power stations adopt a layout pattern of extending along the ground, mainly with open - line roads, supplemented by tunnels and bridges. The layout methods of roads are divided into two types: newly built roads and the reconstruction and expansion of existing local roads. During the design and construction process, this traffic layout method is not only restricted by natural conditions such as topography, geology, climate, and hydrology, but also affected by factors such as land acquisition and demolition. More complexly, road construction involves sensitive areas such as basic farmland and ecological red lines, which makes the route planning of the connecting roads between the upper and lower reservoirs extremely complex, greatly increasing the construction difficulty, extending the construction period, significantly increasing the operation and maintenance costs, and further increasing the project investment and safety risks. In addition, using the existing local roads for construction and operation will not only interfere with the production, life, and traffic of surrounding residents, but also pose safety hazards of mixed traffic between social vehicles and construction vehicles, seriously affecting the regional traffic order and the living quality of residents.

[0003] In view of the above problems, when the engineering construction conditions are limited and it is impossible to arrange the connecting roads between the upper and lower reservoirs along the ground, or the ground - extending roads perform poorly in terms of economic and environmental benefits, there is an urgent need to propose a method for arranging vertical transportation connecting the upper and lower reservoirs. Summary of the Invention

[0004] The technical problem to be solved in the embodiments of the present invention is to provide a method for constructing vertical transportation between the upper and lower reservoirs of a pumped - storage power station to solve the problem in the prior art that it is impossible to arrange the connecting roads between the upper and lower reservoirs along the ground due to limited engineering construction conditions.

[0005] The present invention discloses a method for constructing vertical transportation between the upper and lower reservoirs of a pumped - storage power station, including: Select the proposed upper reservoir and lower reservoir of the pumped - storage power station, build an upper - reservoir circum - reservoir road around the upper reservoir, and build a lower - reservoir circum - reservoir road around the lower reservoir; Build an external transportation road near the lower reservoir, connect one end of the external transportation road to the regional trunk road, and connect the other end of the external transportation road to the lower - reservoir circum - reservoir road; Build a plant ventilation and safety tunnel that is connected to the underground plant near the underground plant, extend one end of the plant ventilation and safety tunnel towards the lower reservoir direction, and connect it to the external transportation road; Dig a transportation shaft around the reservoir basin of the upper reservoir, and arrange a lifting carrier car in the transportation shaft. Build a horizontal tunnel from the other end of the plant ventilation and safety tunnel towards the upper reservoir direction, and connect the end of the horizontal tunnel with the bottom end of the transportation shaft; Build a ground surface open line road at the top outlet of the transportation shaft, extend the ground surface open line road towards the upper reservoir direction, and connect it with the upper reservoir ring reservoir road.

[0006] Optionally, the connection of the other end of the external transportation road with the lower reservoir ring reservoir road includes: Build an access traffic tunnel that penetrates through the underground power house near the underground power house, extend one end of the access traffic tunnel towards the lower reservoir direction, and connect it with the lower reservoir ring reservoir road; Extend one end of the external transportation road towards the lower reservoir direction and connect it with the access traffic tunnel, and the external transportation road is connected with the lower reservoir ring reservoir road through the access traffic tunnel.

[0007] Optionally, the digging of the transportation shaft around the reservoir basin of the upper reservoir includes: Locate the center point of the transportation shaft at the surface of the end of the horizontal tunnel, and use the full-face method to excavate the transportation shaft from top to bottom in segments to the end of the horizontal tunnel, and carry out synchronous support; When the transportation shaft is fully penetrated, install a hanging bucket in the transportation shaft and integrally pour a reinforced concrete lining Optionally, the arrangement of the lifting carrier car in the transportation shaft includes: Configure a plurality of the carrier cars in the transportation shaft, and set car guide rails on the inner wall of the transportation shaft, and install each carrier car on the corresponding car guide rail; Configure a drum hoist corresponding to each carrier car at the top of the transportation shaft, and a driving motor corresponding to and connected to the drum hoist, and connect the pre-wound steel wire rope on the drum hoist with the corresponding carrier car; Configure a control module, establish communication interaction between the control module and each driving motor, and independently control the lifting of each carrier car.

[0008] Optionally, the building of the horizontal tunnel from the other end of the plant ventilation and safety tunnel towards the upper reservoir direction includes: Drive into the mountain body horizontally from the plant ventilation and safety tunnel, and carry out layered excavation according to the preset horseshoe-shaped cross-section and longitudinal slope ratio; After excavating a preset distance, install temporary supports in the horizontal tunnel, and when the horizontal tunnel is fully penetrated, erect a steel formwork trolley and cast the reinforced concrete lining integrally.

[0009] Optionally, constructing a ground surface line road at the top outlet of the transportation shaft includes: Excavate a stepped roadbed from the top outlet of the transportation shaft towards the upper reservoir, and backfill crushed stone soil at the soft foundation until a roadbed with a preset width is laid and compacted; After the roadbed is laid and compacted, pour the cement concrete pavement in blocks with a preset width.

[0010] Optionally, the method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station further includes: Construct the water conveyance and power generation system of the power station, excavate the diversion tunnel around the water conveyance and power generation system and connect it to the water inlet or outlet of the upper reservoir, and excavate the tailrace tunnel around the water conveyance and power generation system and connect it to the water inlet or outlet of the lower reservoir.

[0011] Optionally, the method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station further includes: Construct an upper horizontal section construction adit near the diversion tunnel, connect one end of the upper horizontal section construction adit to the diversion tunnel, and connect the other end of the upper horizontal section construction adit to the transportation shaft.

[0012] Optionally, the method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station further includes: Construct a middle horizontal section construction adit near the diversion tunnel, connect one end of the middle horizontal section construction adit to the diversion tunnel, and connect the other end of the middle horizontal section construction adit to the transportation shaft.

[0013] Optionally, the method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station further includes: Construct a power station construction adit near the tailrace tunnel, connect one end of the power station construction adit to the tailrace tunnel, and connect the other end of the power station construction adit to the diversion tunnel.

[0014] Compared with the prior art, the beneficial effects of the method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station provided by the embodiments of the present invention are as follows: By proposing a composite layout method of "horizontal tunnel + transportation shaft + ground surface line road", a new path is opened for the transportation between the upper and lower reservoirs of the pumped-storage power station. It can not only optimize the traffic layout, avoid the restrictions of basic farmland and ecological red lines, but also significantly improve the transportation efficiency and engineering adaptability, providing a more efficient and convenient traffic solution for the construction and operation of the pumped-storage power station. Brief Description of the Drawings

[0015] The technical solution of the present invention will be further described in detail below in conjunction with the drawings and embodiments. In the drawings: Figure 1 is a schematic plan view of the overall structure of the vertical traffic construction method for the upper and lower reservoirs of a pumped - storage power station provided by an embodiment of the present invention; Figure 2 is a schematic three - dimensional view of the overall structure of the vertical traffic construction method for the upper and lower reservoirs of a pumped - storage power station provided by an embodiment of the present invention; Figure 3 is Figure 2 a schematic view of the overall structure of structure A in

[0016] The marks in the drawings are shown as follows: 1. Upper reservoir; 11. Upper reservoir peripheral road; 2. Lower reservoir; 21. Lower reservoir peripheral road; 3. External traffic road; 4. Plant ventilation and safety tunnel; 5. Transportation shaft; 51. Carrier car; 52. Carriage guide rail; 53. Drum hoist; 54. Driving motor; 55. Control module; 6. Horizontal tunnel; 7. Ground surface road; 8. Entrance access tunnel; 9. Water conveyance and power generation system; 91. Upper horizontal section construction branch tunnel; 92. Middle horizontal section construction branch tunnel; 93. Power station construction branch tunnel. Detailed Embodiments

[0017] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Now, in conjunction with the drawings, the preferred embodiments of the present invention will be described in detail.

[0018] The present invention discloses a method for constructing vertical traffic between the upper and lower reservoirs of a pumped - storage power station. As shown in Figure 1 and Figure 2 , it includes: Select the proposed upper reservoir 1 and lower reservoir 2 of the pumped - storage power station, build the upper reservoir peripheral road 11 around the upper reservoir 1, and build the lower reservoir peripheral road 21 around the lower reservoir 2; Build the external traffic road 3 near the lower reservoir 2, connect one end of the external traffic road 3 with the regional trunk road, and connect the other end of the external traffic road 3 with the lower reservoir peripheral road 21; Build the plant ventilation and safety tunnel 4 which is connected to the underground plant near the underground plant, extend one end of the plant ventilation and safety tunnel 4 towards the lower reservoir 2, and connect it with the external traffic road 3; Dig a transportation shaft 5 around the basin of the upper reservoir 1, arrange a lifting carrier car 51 in the transportation shaft 5, build a horizontal tunnel 6 from the other end of the plant ventilation and safety tunnel 4 towards the upper reservoir 1, and connect the end of the horizontal tunnel 6 with the bottom end of the transportation shaft 5; A surface open-line road 7 is constructed at the top exit of the transport shaft 5 , the surface open-line road 7 is extended toward the upper reservoir 1 , and is connected with the upper reservoir ring road 11 .

[0019] Through the implementation of the above-mentioned embodiment of the vertical traffic construction method for the upper and lower reservoirs of the pumped storage power station, the lower reservoir ring road 21 is taken as the starting point of the construction logistics, and the external traffic highway 3 connecting the regional trunk highway is directly connected to it to form the main channel for the input of external materials. The core breakthrough lies in the horizontal tunnel 6 excavated from the ventilation and safety tunnel 4 of the factory building extending toward the upper reservoir 1. The maximum longitudinal slope ratio is set to 6%, and the end of the horizontal tunnel 6 is precisely connected to the bottom of the transport shaft 5 arranged around the basin of the upper reservoir 1. The carrying car 51 system configured inside the shaft directly absorbs the core height difference through vertical lifting, and is smoothly connected with the upper reservoir ring road 11 through the ground open-line road 7 from the top exit of the transport shaft 5, significantly overcoming the transportation bottleneck of the 10% steep slope and 20m sharp bend of the traditional open-line road with tunnels and bridges, creating safe and smooth conditions for the passage of heavy-loaded equipment, and avoiding the multiple return curves set by the traditional solution to overcome the terrain height difference, so as to form a three-dimensional transportation system of "underground horizontal transfer → vertical lifting of the shaft → ground open-line distribution", fundamentally breaking through the technical limitations of traditional surface roads.

[0020] As mentioned above, in terms of spatial layout, the horizontal tunnel 6 is combined with the vertical lifting of the transport shaft 5 to transform the tortuous line of the traditional winding mountain road into an efficient straight path, greatly reducing the transportation distance; in terms of technical indicators, the maximum longitudinal slope is reduced from 10% to 6%-8%, and the turning radius is expanded by more than three times, so that the safety of large-scale equipment transportation can achieve a qualitative leap; in terms of ecological protection, the underground passage is cleverly used to avoid the basic farmland and ecologically sensitive areas on the surface, minimizing the excavation of high slopes and vegetation damage; in terms of engineering synergy, the intelligent connection between the plant ventilation and safety tunnel 4 and the lower reservoir ring road 21 realizes the diversion and transportation of construction materials and slag, eliminating the risk of mixed traffic of social vehicles and construction machinery. In addition, the system forms a full-cycle transportation capacity throughout the construction period and the operation period: during the construction stage, it serves as the main artery for the transportation of building materials between the upper and lower reservoirs 2, so that the upper reservoir 1 pressure slope material can directly use the slag excavated from the lower reservoir 2; after commissioning, the transport shaft 5 will be permanently reserved as a maintenance channel, greatly improving the emergency maintenance efficiency of key equipment in the power station. This systematic solution, which integrates spatial innovation, technological optimization and eco-friendliness, has created a new transportation paradigm for the construction of pumped-storage power stations in complex terrains, enabling them to have comprehensive benefits such as shortening construction periods, reducing construction costs and reducing environmental interference.

[0021] Furthermore, the other end of the external traffic highway 3 is connected to the lower storage ring road 21, including: A factory access tunnel 8 is constructed near the underground factory building and connected to the underground factory building. One end of the factory access tunnel 8 is extended toward the lower reservoir 2 and connected to the lower reservoir ring road 21. One end of the external traffic road 3 is extended toward the lower reservoir 2 and connected with the factory access tunnel 8 , and the external traffic road 3 is connected with the lower reservoir ring road 21 through the factory access tunnel 8 .

[0022] Through the implementation of the above-mentioned embodiment of the vertical traffic construction method for the upper and lower reservoirs of the pumped storage power station, the transportation of external materials of the power station and the resource transfer of the excavated materials of the lower reservoir 2 can be realized simultaneously. That is, the external materials of the power station are directly input into the plant traffic tunnel 8 from the external traffic highway 3, and can also be transferred to the horizontal tunnel 6 through the ventilation and safety tunnel 4 of the plant; at the same time, the excavated materials of the lower reservoir 2 project are merged into the ventilation and safety tunnel 4 of the plant through the special channel of the lower reservoir ring road 21, and are separated from the external materials and enter the same horizontal tunnel 6. The two types of materials are uniformly loaded at the bottom of the transport shaft 5 through the carrier car 51, and the core height difference is crossed by the vertical lifting of the carrier car 51, and directly reach the upper reservoir ring road 11 through the ground open line road 7, and finally accurately distributed to the construction area of the upper reservoir 1. In this way, the integrated transportation of external materials and the slag of the Lower Reservoir 2 is innovatively realized at the source of transportation, which not only ensures the efficient and direct delivery of external construction materials to avoid detours, but also transforms the excavated materials of the Lower Reservoir 2 into the slope pressure resources of the Upper Reservoir 1, constructing a closed-loop transportation system with no cross-interference and no secondary transfer, and completely breaking through the technical bottlenecks of mixed material flow and long routes in traditional solutions.

[0023] Furthermore, a transport shaft 5 is dug around the reservoir basin of the upper reservoir 1, including: Locate the center point of the transport shaft 5 on the surface at the end of the horizontal tunnel 6, excavate the transport shaft 5 in sections from top to bottom to the end of the horizontal tunnel 6 using the vertical shaft method, and support it simultaneously; When the entire cross section of the transport shaft 5 is penetrated, a hanging tank is set up in the transport shaft 5 and the reinforced concrete lining is poured as a whole.

[0024] Furthermore, combined with Figure 2 and Figure 3 As shown, a lifting and lowering transport car 51 is arranged in the transport shaft 5, including: A plurality of transport cars 51 are arranged in the transport shaft 5, and car guide rails 52 are arranged on the inner wall of the transport shaft 5, and each transport car 51 is installed on the corresponding car guide rail 52; A drum hoist 53 corresponding to the transport car 51 is arranged at the top of the transport shaft 5, and a driving motor 54 connected to the drum hoist 53 corresponding to the transport car 51 is connected to the corresponding transport car 51 through a pre-wound steel wire rope on the drum hoist 53; The control module 55 is configured to establish communication interaction between the control module 55 and each driving motor 54, and independently control each carrier car 51 to rise and fall.

[0025] Through the implementation of the above embodiments of the construction method for the vertical transportation between the upper and lower reservoirs of the pumped - storage power station, a system for cross - height transportation and intelligent control of multi - carrier cars 51 in the transportation shaft 5 is precisely constructed, creatively realizing the efficient vertical transportation of heavy - load materials. In the construction process of the transportation shaft 5, the construction process of central positioning → top - down sectional excavation → synchronous support → integral lining is adopted. The accuracy of the excavation axis is ensured by the construction method of the raise - boring method. The seamless connection of tunneling, support, and lining is achieved through the synchronous implementation of support and integral concrete pouring, effectively controlling the risk of shaft wall deformation and significantly improving the forming efficiency of the shaft. In the design of the carrier car 51, a parallel operation mechanism of multi - carrier cars 51 is innovatively configured: each carrier car 51 operates precisely on an independent car guide rail 52. The drum hoist 53 at the top and the drive motor 54 form a one - to - one power unit, and the carrier car 51 is smoothly lifted and lowered through the pre - winding steel wire rope. Among them, the control module 55 independently regulates the operating parameters of each drive motor 54 through real - time communication, enabling multiple carrier cars 51 to achieve synchronous lifting and lowering and offset operation in the shaft. This significantly improves the material turnover efficiency, and at the same time, the strict safety redundancy guarantee provides reliable support for the transportation of large - sized items, forming a vertical transportation solution with high adaptability, controllability, and scalability.

[0026] As described above, preferably, the transportation shaft 5, as a vertical transportation channel, is connected to the horizontal tunnel 6 at the bottom and to the ground surface line road 7 at the top, forming a complete transportation channel between the upper and lower reservoirs. Its net cross - section size is 17.6×7.8 m (length × width), the construction process adopts the raise - boring method, and the lining structure is reinforced concrete. The carrier car 51, as a vertical transportation platform, has a size of 16.0×7.0 m (length × width). In addition, the planning and design of the transportation shaft 5 fully consider the types, intensities of material transportation in the upper reservoir 1, and the selection of transportation vehicles. After comprehensive evaluation, a 25 - t dump truck can be preferably selected as the main transportation vehicle type. This vehicle type ensures the transportation efficiency while meeting the transportation volume requirements. For the selected transportation vehicle type, the cross - section type of the transportation shaft 5 is determined to be rectangular. This design not only takes into account the safety and stability of the project but also fully considers economic factors, striving to achieve the best balance in all aspects. Secondly, during the selection and size design process of the carrier car 51, factors such as material types, monthly peak transportation intensity of materials, construction progress, and equipment operation efficiency are comprehensively considered, making it more secure compared to surface line road transportation.

[0027] Furthermore, a horizontal tunnel 6 is constructed from the other end of the plant ventilation and safety tunnel 4 towards the upper reservoir 1 direction, including: Tunneling horizontally from the plant ventilation and safety tunnel 4 into the mountain body, and conducting layered excavation according to the preset horseshoe - shaped cross - section and longitudinal slope ratio; After excavating a preset distance, install temporary support in the horizontal tunnel 6. After the horizontal tunnel 6 is fully excavated through, erect a steel formwork trolley and cast reinforced concrete lining integrally.

[0028] Through the implementation of the embodiments of the construction method of the vertical transportation between the upper and lower reservoirs of the pumped-storage power station, a composite lining technology of layered excavation and integral lining is adopted. By setting the parameters of the horseshoe-shaped cross-section and the gentle slope longitudinal slope, the unity of the structural stability and transportation functionality of the horizontal tunnel 6 is achieved. Among them, the horseshoe-shaped cross-section has advantages in ensuring structural stability and space utilization efficiency. Its cross-sectional size is determined comprehensively based on various factors such as the engineering transportation intensity, scale, and equipment passage requirements, etc., to ensure meeting various transportation needs. And the composite lining technology can enhance the bearing capacity and durability of the tunnel, and adapt to complex geological conditions and engineering operation environments.

[0029] During the construction process, strictly implement the operation process of layered tunneling and timely support. Immediately install the temporary support system every time a preset distance is advanced to effectively control the risk of surrounding rock deformation. After the tunnel is fully excavated through, use a steel formwork trolley to carry out the integral pouring of reinforced concrete lining to ensure that the lining structure is continuous and complete and the inner wall flatness is accurately controllable. Thus, fundamentally overcome the problems of joint leakage and structural weakness caused by traditional segmented lining. Through the time-sequence optimization of support and lining, not only the safety of the cavern during the construction period is ensured, but also a permanent passage that meets the heavy-duty transportation requirements is constructed, laying a solid foundation for the efficient transfer of subsequent materials.

[0030] Preferably, the horizontal tunnel 6 has the significant advantages of large buried depth and little interference to the ground, can effectively avoid surface sensitive areas and complex terrain conditions, thus significantly reducing the scale of land acquisition and resettlement, and at the same time minimizing the impact on the ecological environment to the greatest extent. The length of the horizontal tunnel 6 can be determined according to the specific engineering construction layout plan. Set the maximum longitudinal slope ratio of the horizontal tunnel 6 to 6%. Compared with the maximum longitudinal slope of 10% of the open-cut road, the slope reduction effect is significant, which can greatly reduce the difficulty of heavy vehicles on long downhills and climbs, and effectively reduce the possibility of accidents. Among them, the turning radius of the horizontal tunnel 6 is not less than 60m, and the longitudinal slope ratio is in the range of 6% - 8%, the net cross-sectional size is 7.5×6.5m (width × height), the construction technology adopts the New Austrian Tunneling Method, and the lining structure is reinforced concrete.

[0031] Furthermore, build an open-cut road 7 on the ground at the top outlet of the transportation shaft 5, including: Excavate a stepped roadbed from the top outlet of the transportation shaft 5 towards the upper reservoir 1, and replace the soft foundation with crushed stone soil until a roadbed with a preset width is laid and compacted; After the roadbed is laid and compacted, pour a cement concrete road surface in blocks with a preset width.

[0032] Through the implementation of the above-mentioned embodiment of the method for constructing vertical transportation between the upper and lower reservoirs of a pumped-storage power station, a stable road foundation that adapts to steep terrain is constructed by utilizing a comprehensive treatment process of step-type roadbed excavation and replacement of soft foundation. A stepped roadbed structure is formed by layered excavation to effectively disperse the stress of the slope and prevent slope instability; gravel soil replacement reinforcement is implemented for soft geological sections to significantly improve the bearing capacity and deformation resistance of the foundation. After the roadbed is fully compacted, a cement concrete pavement is cast as a whole to ensure that the road surface is continuous and flat and has high compressive strength. This can overcome the dual challenges of complex terrain and poor geology in the top exit area of the transport shaft 5, forming a high-quality transportation terminal that is seamlessly connected to the upper reservoir ring road 11, and providing a smooth and reliable transfer channel for materials to be lifted from the transport shaft 5 to the upper reservoir 1 construction area.

[0033] As mentioned above, the surface open-line road 7 is a newly constructed road, and the road surface is paved with cement concrete. As a key connecting channel, it effectively builds a connection between the vertical transportation system and the upper reservoir 1. The upper reservoir ring road 11 of the upper reservoir 1 can further achieve precise connection with the road on the upper reservoir 1 by virtue of its hub status, thereby building an efficient and complete transportation connection system between the upper and lower reservoirs. Preferably, the surface open-line road 7 is designed according to the standard of the third-level road on the site, with a design speed of 20km / h, a roadbed width of 7.5m, a road surface width of 6.5m, and a cement concrete road surface.

[0034] Furthermore, the method for constructing vertical transportation between upper and lower reservoirs of a pumped storage power station includes: A water transmission and power generation system 9 of the power station is constructed, a water diversion tunnel is excavated around the water transmission and power generation system 9 to connect to the water inlet or outlet of the upper reservoir 1, and a tailwater tunnel is excavated around the water transmission and power generation system 9 to connect to the water inlet or outlet of the lower reservoir 2.

[0035] Furthermore, the method for constructing vertical transportation between upper and lower reservoirs of a pumped storage power station includes: An upper flat section construction branch tunnel 91 is built near the water diversion tunnel, one end of the upper flat section construction branch tunnel 91 is connected to the water diversion tunnel, and the other end of the upper flat section construction branch tunnel 91 is connected to the transportation shaft 5.

[0036] Furthermore, the method for constructing vertical transportation between upper and lower reservoirs of a pumped storage power station includes: A mid-level construction branch tunnel 92 is built near the water diversion tunnel, one end of the mid-level construction branch tunnel 92 is connected to the water diversion tunnel, and the other end of the mid-level construction branch tunnel 92 is connected to the transport shaft 5.

[0037] Furthermore, the method for constructing vertical transportation between upper and lower reservoirs of a pumped storage power station includes: Construct a power station construction access tunnel 93 near the tailrace tunnel, connect one end of the power station construction access tunnel 93 to the tailrace tunnel, and connect the other end of the power station construction access tunnel 93 to the water conveyance tunnel.

[0038] Through the implementation of the embodiments of the above method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station, a three-dimensional transportation system centered on the transportation shaft 5 is constructed to achieve a direct physical connection with the key construction channels of the water conveyance and power generation system 9. That is, the transportation shaft 5 serves as the main axis of vertical transportation, and its bottom end directly and independently connects the upper horizontal section construction access tunnel 91 and the middle horizontal section construction access tunnel 92. During the construction of the water conveyance and power generation system 9, the upper horizontal section construction access tunnel 91, as the main construction channel of the water conveyance tunnel (connecting the water inlet or outlet of the upper reservoir 1), directly excavates an interface at its end to rigidly connect with the transportation shaft 5. Similarly, the middle horizontal section construction access tunnel 92 (usually serving the penstock section or the upper structure of the power house) also directly docks its end to another independent interface at the bottom end of the transportation shaft 5. This "direct connection between access tunnel and shaft" mode eliminates any intermediate transfer links, enabling the carrier car system 51 operating in the transportation shaft 5 to directly serve the working faces of key parts such as the water conveyance tunnel and penstock.

[0039] As described above, on the one hand, a large amount of slag generated during the excavation of the water conveyance tunnel is loaded by dump trucks and directly transported to the carrier car 51 in the transportation shaft 5 through the upper horizontal section construction access tunnel 91. After being vertically lifted by the car, it is quickly and directly transported to the filling area of the upper reservoir 1 through the surface open-cut road 7 for resource utilization, realizing the closed-loop cycle of "generation - transportation - utilization" of the excavated material, and completely avoiding the huge costs and efficiency losses of slag transportation and disposal or long-distance horizontal transfer in the traditional scheme. On the other hand, construction materials such as concrete, steel, precast components, as well as major metal structures such as penstocks and gates, are transported to the bottom of the transportation shaft 5 through the horizontal channels composed of the external access road 3, the power house ventilation and safety tunnel 4, and the horizontal tunnel 6, and are also vertically lifted by the carrier car 51. After these materials reach the top of the shaft, some are transported to the construction area of the upper reservoir 1 through the surface open-cut road 7, while some materials required for the construction of the water conveyance and power generation system 9, especially those needed to be transported to the working faces served by the middle horizontal section construction access tunnel 92 (such as the penstock installation section and the concrete pouring surface of the unit), can be directly transported by trucks through the direct connection interface between the middle horizontal section construction access tunnel 92 and the transportation shaft 5 to reach the forefront of construction accurately and efficiently, significantly improving the construction efficiency of the water conveyance and power generation system 9. Thus, it solves the systematic bottleneck problems such as long transportation distance, many path intersections and interferences, difficult transportation of large components, and low feeding efficiency for working faces at different elevations caused by the traditional reliance on a single horizontal channel, and creates significant comprehensive benefits in terms of shortening the construction period, reducing the cost, ensuring safety, and improving quality for the construction of the core hub of the water conveyance and power generation system 9.

[0040] The vertical transportation between the upper and lower reservoirs of a pumped-storage power station constructed by the construction method of the present invention has the following working principle: The pumped-storage power station constructs a transportation system between the upper and lower reservoirs by means of the ventilation and safety tunnel 4 of the powerhouse, the horizontal tunnel 6, the transportation shaft 5, the carrier car 51, and the ground open-line road 7. The external materials of the power station and the excavated materials for the project of the lower reservoir 2 can be transported to the upper reservoir 1 through this transportation method. At the same time, the combination of the upper horizontal construction adit 91, the middle horizontal construction adit 92 and the transportation shaft 5 provides a convenient and efficient passage for the excavation slag operation, concrete pouring construction and metal structure installation work of the water conveyance and power generation system 9 of the power station.

[0041] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced; and all such modifications and replacements should fall within the protection scope of the present invention.

Claims

1. A construction method for the vertical transportation between the upper and lower reservoirs of a pumped-storage power station, characterized in that The method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station includes: Select the proposed upper reservoir and lower reservoir of the pumped-storage power station, construct the upper reservoir circumferential road around the upper reservoir, and construct the lower reservoir circumferential road around the lower reservoir; Construct an external transportation road near the lower reservoir, connect one end of the external transportation road with the regional arterial road, and connect the other end of the external transportation road with the lower reservoir circumferential road; Construct a ventilation and safety tunnel for the power house that is connected to the underground power house near the underground power house, extend one end of the ventilation and safety tunnel for the power house towards the lower reservoir, and connect it with the external transportation road; Dig a transportation shaft around the reservoir basin of the upper reservoir, arrange a lifting carrier car in the transportation shaft, construct a horizontal tunnel from the other end of the ventilation and safety tunnel for the power house towards the upper reservoir, and connect the end of the horizontal tunnel with the bottom end of the transportation shaft; Construct a ground surface line road at the top outlet of the transportation shaft, extend the ground surface line road towards the upper reservoir, and connect it with the upper reservoir circumferential road.

2. The method for constructing the vertical transportation between the upper and lower reservoirs of a pumped-storage power station according to claim 1, characterized in that The connection of the other end of the external transportation road with the lower reservoir circumferential road includes: Construct an access tunnel for the power house that is connected to the underground power house near the underground power house, extend one end of the access tunnel for the power house towards the lower reservoir, and connect it with the lower reservoir circumferential road; Extend one end of the external transportation road towards the lower reservoir and connect it with the access tunnel for the power house, and the external transportation road is connected to the lower reservoir circumferential road through the access tunnel for the power house.

3. The method for constructing the vertical transportation between the upper and lower reservoirs of a pumped-storage power station according to claim 1, characterized in that, The excavation of the transportation shaft around the reservoir basin of the upper reservoir includes: Locate the center point of the transportation shaft on the ground surface at the end of the horizontal tunnel, use the full-face shaft method to excavate the transportation shaft in sections from top to bottom to the end of the horizontal tunnel, and carry out synchronous support; When the transportation shaft is fully penetrated, install a suspension bucket in the transportation shaft and integrally pour a reinforced concrete lining.

4. The method for constructing the vertical transportation between the upper and lower reservoirs of a pumped-storage power station according to claim 3, characterized in that The arrangement of the lifting carrier car in the transportation shaft includes: Configure multiple carrier cars in the transportation shaft, set car guide rails on the inner wall of the transportation shaft, and install each carrier car on the corresponding car guide rail; Configure a drum hoist corresponding to each carrier car at the top of the transportation shaft, and a drive motor corresponding to and connected to the drum hoist, and connect the pre-wound steel wire rope on the drum hoist with the corresponding carrier car; Configure a control module, establish communication interaction between the control module and each drive motor, and independently control the lifting of each carrier car.

5. The method for constructing the vertical transportation between the upper and lower reservoirs of a pumped-storage power station according to claim 1, characterized in that The construction of the horizontal tunnel from the other end of the ventilation and safety tunnel for the power house towards the upper reservoir includes: Drive horizontally into the mountain body from the ventilation and safety tunnel for the power house, and carry out layered excavation according to the preset horseshoe-shaped cross-section and longitudinal slope ratio; Install temporary support in the horizontal tunnel after excavating a preset distance, and install a steel formwork trolley and integrally pour a reinforced concrete lining when the horizontal tunnel is fully penetrated.

6. The method for constructing the vertical transportation between the upper and lower reservoirs of a pumped-storage power station according to claim 1, characterized in that, Constructing a ground surface open-cut road at the top exit of the transportation shaft, including: Excavating a stepped roadbed from the top exit of the transportation shaft towards the upper reservoir direction, and replacing the soft foundation with gravelly soil until a roadbed with a preset width is laid and compacted; After the roadbed is laid and compacted, pouring a cement concrete road surface with a preset width in sections.

7. The method for constructing the vertical transportation between the upper and lower reservoirs of a pumped-storage power station according to claim 1, wherein The method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station further includes: Constructing the water conveyance and power generation system of the power station, excavating a water diversion tunnel around the water conveyance and power generation system and connecting it to the water inlet or outlet of the upper reservoir, and excavating a tailrace tunnel around the water conveyance and power generation system and connecting it to the water inlet or outlet of the lower reservoir.

8. The method for constructing the vertical transportation between the upper and lower reservoirs of a pumped-storage power station according to claim 7, characterized in that, The method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station further includes: Constructing an upper horizontal section construction access tunnel near the water diversion tunnel, connecting one end of the upper horizontal section construction access tunnel to the water diversion tunnel, and connecting the other end of the upper horizontal section construction access tunnel to the transportation shaft.

9. The method for constructing the vertical transportation between the upper and lower reservoirs of a pumped-storage power station according to claim 7, characterized in that, The method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station further includes: Constructing a middle horizontal section construction access tunnel near the water diversion tunnel, connecting one end of the middle horizontal section construction access tunnel to the water diversion tunnel, and connecting the other end of the middle horizontal section construction access tunnel to the transportation shaft.

10. The method for constructing the vertical transportation between the upper and lower reservoirs of a pumped-storage power station according to claim 7, characterized in that, The method for constructing the vertical transportation between the upper and lower reservoirs of the pumped-storage power station further includes: Constructing a power station construction access tunnel near the tailrace tunnel, connecting one end of the power station construction access tunnel to the tailrace tunnel, and connecting the other end of the power station construction access tunnel to the water diversion tunnel.

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