Anti-seepage structure, pumped storage power station anti-seepage bottom plate and construction method

Abstract

The invention provides an anti-seepage structure, a pumped storage power station anti-seepage bottom plate and a construction method, and relates to the technical field of anti-seepage engineering.The structure comprises a joint core bottom plate, an auxiliary bottom plate and a connecting piece, and the periphery of the bottom of the joint core bottom plate extends in the horizontal direction to form protrusions; concave parts matched with the protrusions are arranged on the periphery of the bottom of the auxiliary bottom plate, the joint core bottom plate and the auxiliary bottom plate are connected through connecting pieces, and the protrusions are arranged in the concave parts. The construction efficiency can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of seepage prevention engineering technology, and more specifically, to a seepage prevention structure, a seepage prevention base plate for a pumped storage power station, and a construction method thereof. Background Technology

[0002] Driven by the goal of green energy, the power system's demand for flexibility, stability, and clean energy absorption capacity has significantly increased. For example, pumped storage power stations, as technologically mature and economically feasible large-scale energy storage facilities, are playing an increasingly prominent role in peak shaving, frequency and phase regulation, and emergency backup. In reservoir areas with geological conditions such as karst or fissured rock formations, low groundwater levels, and deep impermeable layers, reservoir basin seepage prevention has become a critical link in ensuring the safe operation of power stations, urgently requiring efficient and reliable seepage prevention technologies to support large-scale construction needs.

[0003] In related technologies, the main solutions used in the whole reservoir basin seepage prevention project of pumped storage power station include reinforced concrete panel seepage prevention and reservoir bottom geomembrane seepage prevention. However, the construction process of these two solutions is relatively complicated (such as steel bar binding, concrete pouring, geomembrane laying and welding, etc.), which requires a lot of manpower and time, affecting construction efficiency. Summary of the Invention

[0004] The problem addressed by this invention is how to improve the efficiency of seepage prevention construction throughout the entire reservoir basin of a power station.

[0005] To address the aforementioned problems, this invention provides a seepage-proof structure, a seepage-proof base slab for a pumped storage power station, and a construction method. In a first aspect, the present invention provides a seepage-proof structure, including a node core base plate, an auxiliary base plate, and a connector. The bottom periphery of the node core base plate extends horizontally to form a protrusion, and the bottom periphery of the auxiliary base plate is provided with a recess matching the protrusion. The node core base plate and the auxiliary base plate are connected by the connector, and the protrusion is disposed in the recess.

[0006] Optionally, the node core base plate and the auxiliary base plate each include a seepage-proof surface layer, a support layer, and a leveling layer. The support layer is disposed between the leveling layer and the seepage-proof surface layer. The leveling layer of the node core base plate extends horizontally around its perimeter to form the protrusion. The leveling layer of the auxiliary base plate is provided with recesses matching the protrusion around its perimeter. The main outlines of both the node core base plate and the auxiliary base plate are rectangular.

[0007] Optionally, the structure further includes a first sleeve and a bolt. The first sleeve is provided at each of the four corners inside the support layer. The axis of the first sleeve is parallel to the vertical direction. A threaded through hole is provided at the matching position of the flat layer and the first sleeve. The bolt passes through the first sleeve and is threadedly connected to the threaded through hole.

[0008] Optionally, the structure further includes a second sleeve, which is disposed in the middle between the two first sleeves near the side of the support layer. The axis of the second sleeve is perpendicular to the side. The second sleeve is provided with an internal thread. The connector is provided with an external thread that matches the internal thread. The connector passes through the support layer and is threadedly connected to the second sleeve.

[0009] Optionally, the side of the support layer is provided with a through hole communicating with the second sleeve. The diameter of the through hole matches the outer diameter of the connector, and the connector passes through the through hole and is threadedly connected to the second sleeve.

[0010] Optionally, the structure further includes reinforcing bars, two of which are respectively disposed above and below the second sleeve, and the two ends of the reinforcing bars are respectively connected to the first sleeves on both sides of the second sleeve.

[0011] Optionally, the upper surface of the support layer is provided with a first corrugated protrusion, and the lower surface of the impermeable surface layer is provided with a second corrugated protrusion that matches the first corrugated protrusion. The first corrugated protrusion of the support layer and the second corrugated protrusion of the impermeable surface layer are connected in a cooperative manner.

[0012] Optionally, the leveling layer is made of a rigid material, and / or the impermeable surface layer is made of an impermeable material.

[0013] In a second aspect, the present invention provides a seepage-proof base plate for a pumped storage power station, including the seepage-proof structure described in the first aspect.

[0014] Thirdly, the present invention provides a construction method for a seepage-proof base slab of a pumped storage power station. Based on the seepage-proof structure described in the first aspect, the construction method for the seepage-proof base slab includes: According to the design requirements obtained, the node core base plate and the auxiliary base plate are spliced ​​together by connectors, and the gaps between the adjacent node core base plates and the auxiliary base plates are filled with asphalt-based cementitious material.

[0015] The beneficial effects of the seepage-proof structure of this invention are as follows: A precise interlocking structure is formed by the protrusions at the bottom of the core node base plate and the matching recesses at the bottom of the auxiliary base plate. During installation, alignment can be quickly achieved without complex measurements and calibrations, avoiding the time-consuming process of repeated adjustments and positioning on-site, and significantly improving the efficiency of base plate installation. Simultaneously, the connection of the connectors reduces the time required for precise on-site tightening, accelerating the splicing speed. Furthermore, the core node base plate and auxiliary base plate can be prefabricated in the factory, eliminating the cumbersome procedures of on-site rebar tying and concrete pouring required in traditional solutions. After the prefabricated components are transported to the site, they can be quickly assembled directly using the interlocking of the protrusions and recesses and the connection of the connectors, eliminating the need for time-consuming concrete curing processes. This also avoids the impact of severe weather on construction, saving time and labor costs associated with construction and curing, and improving the overall construction efficiency of the seepage-proof structure. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of a seepage-proof structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a seepage-proof structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the corrugated protrusions of the support layer in an embodiment of the present invention; Figure 4 This is a schematic diagram of the embedded structure of the support layer in an embodiment of the present invention; Figure 5 This is a schematic diagram of the anti-seepage base plate of a pumped storage power station according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 01-Impervious surface layer; 02-Support layer; 03-Leveling layer; 04-Connector; 05-Protrusion; 06-Recess; 07-Through hole; 08-First sleeve; 09-Bolt; 10-Second sleeve; 11-Reinforcing bar; 12-First corrugated protrusion; 13-Second corrugated protrusion; 14-Threaded through hole; 15-Node core base plate; 16-Auxiliary base plate. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0020] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0021] like Figure 1 and Figure 5 As shown in the figure, an embodiment of the present invention provides a seepage-proof structure, including a node core base plate 15, an auxiliary base plate 16, and a connector 04. The bottom periphery of the node core base plate 15 extends horizontally to form a protrusion 05. The bottom periphery of the auxiliary base plate 16 is provided with a recess 06 that matches the protrusion 05. The node core base plate 15 and the auxiliary base plate 16 are connected by the connector 04, and the protrusion 05 is disposed in the recess 06.

[0022] Specifically, the bottom perimeter of the node core base plate 15 has protrusions 05 extending horizontally around its perimeter, thus giving the bottom perimeter of the node core base plate 15 a structure of protrusions 05. The bottom perimeter of the auxiliary base plate 16 is provided with recesses 06 that match the structure of the protrusions 05. By embedding the protrusions 05 of the node core base plate 15 into the corresponding recesses 06 of the auxiliary base plate 16, the node core base plate 15 and the auxiliary base plate 16 can be precisely aligned and spliced ​​during laying, ensuring a tight splice between the two and reducing interlayer gaps to lay a foundation for seepage prevention. Simultaneously, the adjacent node core base plate 15 and auxiliary base plate 16 are connected by connector 04. One end of connector 04 is connected to the node core base plate 15, and the other end is connected to the adjacent auxiliary base plate 16. The connection method of connector 04 can be welding or bolting. For example, one end of connector 04 is welded to the pre-reserved connection point (such as the rebar lead-out point embedded in the concrete) at the corresponding position of node core base plate 15, and the other end is welded to the pre-reserved connection point at the corresponding position of adjacent auxiliary base plate 16. Since the adjacent node core base plate 15 and auxiliary base plate 16 are not tightly connected, there is a certain gap between them, which can be used for corresponding connection operations. Connector 04 ensures the stability of the connection between the two base plates after splicing. After the node core base plate 15 and auxiliary base plate 16 are spliced, asphalt mastic can be filled into the adjacent gaps to provide a stable structural foundation and ensure the overall stability and seepage prevention performance of the final seepage-proof base plate structure.

[0023] In this embodiment, a precise fitting structure is formed by the protrusion 05 at the bottom of the core base plate 15 and the matching recess 06 at the bottom of the auxiliary base plate 16. During installation, alignment can be quickly achieved without complex measurement and calibration, avoiding the time-consuming process of repeated adjustments and positioning on-site, and significantly improving the efficiency of base plate laying. Simultaneously, the connection via connector 04 reduces the time required for precise on-site tightening, accelerating the splicing speed. Furthermore, the core base plate 15 and auxiliary base plate 16 can be prefabricated in the factory, eliminating the cumbersome procedures of on-site steel reinforcement tying 11 and concrete pouring required in traditional solutions. After the prefabricated components are transported to the site, they can be quickly assembled directly using the fitting of the protrusion 05 and recess 06 and the connection via connector 04, eliminating the need for time-consuming concrete curing processes. This also avoids the impact of severe weather on construction, saving time and labor costs associated with construction and curing, and improving the overall construction efficiency of the seepage prevention structure.

[0024] Optionally, such as Figure 1As shown, the node core base plate 15 and the auxiliary base plate 16 respectively include a seepage-proof surface layer 01, a support layer 02, and a flattening layer 03. The support layer 02 is disposed between the flattening layer 03 and the seepage-proof surface layer 01. The flattening layer 03 of the node core base plate 15 extends horizontally to form the protrusion 05. The flattening layer 03 of the auxiliary base plate 16 is provided with the recess 06 matching the protrusion 05 around its perimeter. The main outlines of the node core base plate 15 and the auxiliary base plate 16 are both rectangular.

[0025] Specifically, both the node core base plate 15 and the auxiliary base plate 16 consist of three structural layers: a seepage-proof surface layer 01, a support layer 02, and a leveling layer 03. The support layer 02 is located between the leveling layer 03 and the seepage-proof surface layer 01, serving as a connection and support. Both are rectangular in shape, but differ in their specific construction details. The leveling layer 03 of the node core base plate 15 extends horizontally outwards around its perimeter to form protrusions 05, while the leveling layer 03 of the auxiliary base plate 16 similarly forms recesses 06 around its perimeter that correspond to the protrusions 05 of the node core base plate 15. The node core base plate 15 and the auxiliary base plate 16 are joined by embedding the protrusions 05 into the corresponding recesses 06. The core slab 15 and auxiliary slab 16 can be prefabricated in advance, i.e., completed in the factory through standardized processes. This avoids complex on-site construction (such as rebar tying, concrete pouring, geomembrane laying and welding), and mitigates the impact of environmental factors such as severe weather. By assembling the core slab and auxiliary slab 16, the overall construction efficiency is improved. During prefabrication, through raw material selection and pretreatment, precast concrete meeting strength requirements can be used for the support layer 02, and its load-bearing capacity and impermeability can be ensured through mix design. For the leveling layer 03, alloy rigid materials can be used, cut to the dimensions of a rectangular slab. Simultaneously, the flat layer 03 is processed differently according to the splicing requirements. The flat layer 03 of the core base plate 15 has horizontally extending protrusions 05 around its perimeter. This can be achieved by welding or cutting larger materials into flat layers 03 with protrusions 05 to meet the requirements. The flat layer 03 of the auxiliary base plate 16 has correspondingly cut recesses 06 around its perimeter to perfectly match the size and shape of the protrusions 05, ensuring precise fitting during subsequent splicing. During the factory prefabrication and casting of the support layer 02, a template matching the size of the rectangular base plate is first erected. Positioning frames for the supporting steel bars 11 are pre-set within the template. Precast concrete is poured and standard curing is performed. After curing, the template is removed. The pre-assembly and fixing of the flat layer 03 and support layer 02 are completed: In the factory, the cured support layer 02 and the corresponding flat layer 03 are aligned according to the design position and initially connected and fixed to avoid time-consuming secondary assembly on site. At the same time, the accuracy of the connection position is verified to ensure that the overall component dimensions meet the requirements for basin laying. In addition, for the prefabrication or pretreatment of the seepage-proof surface layer 01, if asphalt concrete is used, it can be prefabricated in the factory into slabs that are compatible with the support layer 02; if geomembrane is used, it can be cut into corresponding specifications according to the size of the base plate, reducing the amount of cutting and splicing work during on-site laying.Finally, the prefabricated core base plate 15 and auxiliary base plate 16 are subjected to overall quality inspection, including the concrete strength of the support layer 02, the accuracy of the position of the embedded components, the matching degree of the protrusions 05 and depressions 06 in the flat layer 03, and the firmness of the connection between each layer. After passing the inspection, they are numbered and marked to facilitate quick positioning and splicing on site according to the number, further improving construction efficiency.

[0026] Optionally, such as Figures 1 to 4 As shown, the structure also includes a first sleeve 08 and a bolt 09. The first sleeve 08 is provided at the four corners of the interior of the support layer 02. The axis of the first sleeve 08 is parallel to the vertical direction. The flat layer 03 has a threaded through hole 14 at the matching position with the first sleeve 08. The bolt 09 passes through the first sleeve 08 and is threadedly connected to the threaded through hole 14.

[0027] In this optional embodiment, the first sleeve 08 and bolts 09 can achieve a stable connection between the support layer 02 and the flat layer 03, ensuring the reliability of the overall structural assembly. Furthermore, its design and installation can fully adapt to the high-efficiency requirements of factory prefabrication and on-site assembly. Specifically, the first sleeve 08 is precisely positioned at the four corners inside the support layer 02. This corner layout ensures uniform and symmetrical force distribution when the support layer 02 and flat layer 03 are connected, avoiding interlayer displacement or structural deformation due to localized force concentration. It also minimizes interference with the supporting steel bars 11 and other embedded components inside the support layer 02. The axis of the first sleeve 08 is parallel to the vertical direction, meaning it is vertically upward within the support layer 02. This ensures that the subsequent bolts 09 can transmit tightening force vertically, allowing the support layer 02 and flat layer 03 to fit tightly together, preventing gaps and uneven force distribution caused by tilted connections. Matching the first sleeve 08 is the threaded through hole 14 that is completely aligned with the position of the first sleeve 08, which is processed in the prefabrication stage of the leveling layer 03. That is, the threaded through hole 14 is opened at the four corner positions of the leveling layer 03. The thread specification is strictly matched with the thread of the bolt 09 and the inner wall of the first sleeve 08, eliminating the need for on-site drilling or adjustment, and greatly reducing the difficulty of on-site construction. During assembly, bolts 09 can pass through the first sleeve 08 embedded in the support layer 02 from top to bottom, and form a threaded connection with the threaded through hole 14 of the flat layer 03. Tightening with a wrench can firmly fix the support layer 02 and the flat layer 03. This connection method is not only easy to operate, but also ensures the stability of the interlayer connection through thread engagement, effectively preventing the interlayer separation caused by water pressure when the reservoir is filled later. At the same time, the interlocking structure of the protrusions 05 and depressions 06 of the flat layer 03 further improves the overall structural integrity of the base plate, laying a solid foundation for the subsequent laying of the seepage-proof surface layer 01 and the filling of gaps with seepage-proof materials (such as asphalt mastic). This not only ensures the seepage-proof performance, but also fits the core advantages of efficient and precise prefabricated construction.

[0028] Optionally, such as Figures 1 to 4 As shown, the structure also includes a second sleeve 10. The second sleeve 10 is disposed in the middle between the two first sleeves 08 near the side of the support layer 02. The axial direction of the second sleeve 10 is perpendicular to the side. The second sleeve 10 is provided with an internal thread. The connector 04 is provided with an external thread that matches the internal thread. The connector 04 passes through the support layer 02 and is threadedly connected to the second sleeve 10.

[0029] In this optional embodiment, the second sleeve 10 is a key component for strengthening the lateral connection between adjacent support layers 02 and improving the overall structural splicing tightness. Its design and layout are fully adapted to the lateral connection requirements of prefabricated construction. The second sleeve 10 is located in the middle between the two first sleeves 08 near the side of the support layer 02. This central layout can avoid positional conflicts with the first sleeves 08 (which are responsible for the vertical connection between the support layer 02 and the leveling layer 03), and can also make the lateral connection force evenly distributed on the side of the support layer 02, preventing gaps from appearing at the splice due to uneven force. At the same time, the central setting can make the connector 04, such as the screw, quickly and accurately aligned when connecting the two support layers 02, improving the connection efficiency between the connector 04 and the two second sleeves 10. The axis of the second sleeve 10 is perpendicular to the side of the support layer 02, i.e., parallel to the horizontal direction, ensuring that the subsequent connector 04 can be accurately connected in the horizontal direction, achieving lateral connection between adjacent support layers 02. Simultaneously, the inner wall of the second sleeve 10 has a pre-set internal thread, and the diameter of the internal thread perfectly matches the diameter of the external thread on the outer wall of the connector 04. The thread engagement achieves a firm connection between the two, ensuring connection stability while also providing a degree of disassembly, facilitating fine-tuning of the position during on-site assembly. During the factory prefabrication of the support layer 02, the second sleeve 10, along with the supporting steel reinforcement 11, the first sleeve 08, and other components, is precisely embedded into the concrete, ensuring that its position and axis conform to design standards, avoiding secondary drilling or adjustments on-site. During on-site construction, simply insert the connector 04 from one side of the support layer 02 and thread it into the second sleeve 10. No complex calibration is required. With the positioning of the protrusions 05 and depressions 06 of the leveling layer 03, the double fixing of adjacent base plates can be quickly achieved, further improving splicing efficiency and structural integrity, and laying a solid foundation for subsequent filling of asphalt mastic and laying of the impermeable surface layer 01.

[0030] Optionally, such as Figures 1 to 3 As shown, the side of the support layer 02 is provided with a through hole 07 that communicates with the second sleeve 10. The diameter of the through hole 07 matches the outer diameter of the connector 04. The connector 04 passes through the through hole 07 and is threadedly connected to the second sleeve 10.

[0031] In this optional embodiment, a structure is achieved by precisely connecting the connector 04 and the second sleeve 10 through a through hole 07 on the side of the support layer 02. This design strictly matches the overall prefabricated construction logic and connection stability requirements. The through hole 07 is not independently created but is coaxially connected to the second sleeve 10 pre-installed inside the support layer 02. During the factory prefabrication of the support layer 02, a side through hole 07 with a diameter matching the outer diameter of the connector 04 is simultaneously machined according to the axial position, inner diameter of the second sleeve 10, and the outer diameter specifications of the connector 04. This ensures that the connector 04 can smoothly pass through the through hole 07 and slide smoothly within the hole, guaranteeing a fast and accurate subsequent threaded connection. This eliminates the need for secondary drilling or adjustment of the support layer 02 during on-site assembly. The connector 04 can be directly threaded into the internal thread of the second sleeve 10 by simply inserting it through the side through hole 07 of one side of the support layer 02. Furthermore, the connector 04's ability to slide and rotate relative to the support layer 02 allows it to adapt and connect even with minor installation deviations between adjacent support layers 02, further reducing the difficulty of on-site operation.

[0032] Optionally, such as Figures 1 to 4 As shown, the structure also includes steel bars 11, with two steel bars 11 respectively disposed above and below the second sleeve 10, and the two ends of the steel bars 11 respectively connected to the first sleeve 08 on both sides of the second sleeve 10.

[0033] In this optional embodiment, the function of the reinforcing bar 11 is to strengthen the overall structural integrity and load-bearing capacity of the support layer 02. Its arrangement and position are strictly adapted to the layout of the first sleeve 08 and the second sleeve 10 within the support layer 02, forming a stable local load-bearing frame. Specifically, the two reinforcing bars 11 are arranged parallel above and below each second sleeve 10, respectively, in a symmetrical vertical distribution. This layout avoids positional conflicts with the second sleeve 10 and the connector 04, and provides a clamping and stabilizing effect on the second sleeve 10 from both vertical and horizontal dimensions, preventing displacement or tilting of the second sleeve 10 under subsequent stress (such as reservoir water pressure or construction loads). Furthermore, the two ends of the reinforcing bar 11 are not independently fixed, but are connected to the first sleeve 08 on both sides of the second sleeve 10. During the factory prefabrication of the support layer 02, the reinforcing bars 11, the first sleeve 08, and the second sleeve 10 can be fixed together by welding or temporary connection using precast concrete encapsulation, ensuring the three elements form a stable structure. The structure forms a stable structure, which connects the first sleeve 0 at the four corners of the support layer 02 with the second sleeve 10 in the middle (which bears the lateral connection force of adjacent support layers 02) into a complete force system. This effectively disperses the external force on the support layer 02 and avoids local stress concentration that could lead to cracking of the concrete of the support layer 02 or loosening of the sleeves. In addition, the addition of the steel bar 11 can also improve the overall deformation resistance of the support layer 02. Especially under the conditions of long-term water storage and repeated water level changes in the reservoir, it can reduce the deformation of the support layer 02 caused by uneven stress, thereby ensuring the stability of the entire seepage prevention structure. At the same time, the installation of the steel bar 11 can be completed in the factory prefabrication stage without the need for additional binding on site, which further fits the core advantages of prefabricated construction: high efficiency and controllable quality.

[0034] Optionally, such as Figures 1 to 3 As shown, the upper surface of the support layer 02 is provided with a first corrugated protrusion 12, and the lower surface of the impermeable surface layer 01 is provided with a second corrugated protrusion 13 that matches the first corrugated protrusion 12. The first corrugated protrusion 12 of the support layer 02 and the second corrugated protrusion 13 of the impermeable surface layer 01 are connected in a cooperative manner.

[0035] In this optional embodiment, to achieve a stable connection between the support layer 02 and the impermeable surface layer 01 and enhance the overall structural integrity, a first corrugated protrusion 12 is formed on the upper surface of the support layer 02, and a second corrugated protrusion 13 matching the first corrugated protrusion 12 is correspondingly formed on the lower surface of the impermeable surface layer 01. That is, the corrugation shape, spacing, height, and other parameters of the second corrugated protrusion 13 are completely matched with those of the first corrugated protrusion 12. During assembly, the first corrugated protrusion 12 of the support layer 02 and the second corrugated protrusion 13 of the impermeable surface layer 01 interlock through a corresponding concave-convex structure, thereby achieving a tight fit between the two. This corrugated fit not only increases the contact area between the two layers and improves the strength of the connection, but also effectively limits the relative sliding between them, ensuring the stability of the overall structure.

[0036] Optionally, the leveling layer 03 is made of a rigid material, and / or the impermeable surface layer 01 is made of an impermeable material.

[0037] In this optional embodiment, the leveling layer 03, as the direct contact surface between the base plate and the reservoir foundation, needs to bear the weight of the upper support layer 02 and the impermeable surface layer 01, and provide a stable benchmark for the splicing of adjacent base plates (node ​​core base plate 15 and auxiliary base plate 16). Therefore, a rigid material (such as an alloy rigid material) is selected. This ensures that the material itself is not easily deformed by loads or external construction forces, ensuring the overall flatness of the reservoir. It also allows for precise fitting during splicing through precision processing (such as the protrusions 05 of the leveling layer 03 of the node core base plate 15 and the recesses 06 of the leveling layer 03 of the auxiliary base plate 16), avoiding misalignment caused by material flexibility. At the same time, the rigid material has strong durability and can resist uneven settlement of the reservoir foundation for a long time, ensuring structural stability. As a key barrier to prevent water from seeping downwards into the reservoir, the impermeable surface layer 01 needs to be made of a material with excellent water-proofing properties, such as asphalt concrete or geomembrane. Asphalt concrete, with its dense granular structure, effectively blocks water seepage and can be prefabricated into slabs compatible with the support layer 02 (such as the corrugated surface layer of the support layer 02 of the node core base slab 15), facilitating factory prefabrication and on-site laying. Geomembrane, relying on the water-resistant properties of polymer materials, boasts advantages such as light weight and excellent seepage prevention. It can be directly laid after being cut to the base slab dimensions, reducing on-site splicing gaps. In practical applications, the rigidity of the leveling layer 03 ensures the stability and precision of structural assembly, while the seepage prevention properties of the seepage-proof surface layer 01 ensure the reliability of the seepage prevention function. The synergistic effect of these two layers not only meets the high-efficiency requirements of prefabricated construction but also solves the problems of low construction efficiency and high leakage risk caused by poor material compatibility in traditional seepage prevention schemes, ultimately achieving the dual goals of rapid construction and reliable seepage prevention.

[0038] The present invention provides a seepage-proof base plate for a pumped storage power station, comprising the seepage-proof structure described above.

[0039] In this embodiment, a complete seepage-proof base plate structure is formed by splicing together two types of base plates: the node core base plate 15 and the auxiliary base plate 16. For example... Figure 5 As shown, the spliced ​​impermeable base plate integrates the key design of the impermeable structure: vertical precision is achieved through the protrusion 05 of the flat layer 03 of the node core base plate 15 and the recess 06 of the flat layer 03 of the auxiliary base plate 16; the through hole 07 on the side of the support layer 02, in conjunction with the connector 04, is threaded to the second sleeve 10 inside the support layer 02 to complete the lateral fastening; at the same time, both the node core base plate 15 and the auxiliary base plate 16 themselves contain layers of impermeable surface layer 01, support layer 02, and flat layer 03. The structure (such as the seepage-proof material of the seepage-proof surface layer 01, the load-bearing and connecting components of the support layer 02, etc.) together extend the functions of the seepage-proof structure, such as splicing and positioning, interlayer fixing, lateral connection, and seepage barrier, to the scale of the entire pumped storage power station reservoir basin. It not only continues the advantages of the original seepage-proof structure's efficient prefabricated construction and reliable seepage prevention, but also adapts to the engineering needs of large-area seepage prevention in the reservoir basin, ensuring that the bottom plate maintains stable and excellent seepage prevention performance through the synergistic effect of multiple units under working conditions such as water pressure and foundation deformation.

[0040] This invention provides a construction method for a seepage-proof base slab of a pumped storage power station. Based on the seepage-proof structure described above, the construction method for the seepage-proof base slab includes: According to the design requirements obtained, the node core base plate 15 and the auxiliary base plate 16 are spliced ​​together by connector 04, and the gaps between the adjacent node core base plate 15 and the auxiliary base plate 16 are filled with asphalt-based cementitious material.

[0041] In this embodiment, during the on-site assembly of the node core base plate 15 and the auxiliary base plate 16, the initial fitting and positioning are first completed by the protrusion 05 at the bottom of the node core base plate 15 and the corresponding recess 06 at the bottom of the auxiliary base plate 16. Then, the connector 04 connects the adjacent node core base plate 15 and the auxiliary base plate. The horizontal rigidity can be achieved by tightening with a wrench to ensure that the two base plates have no relative displacement in the horizontal direction. After the parts are assembled, the tiny gaps between adjacent base plates (core base plate 15 and auxiliary base plate 16) caused by processing precision or assembly errors are filled with asphalt-based cementitious materials, such as petroleum asphalt, modified asphalt, emulsified asphalt, coal tar, and asphalt mastic (asphalt adhesive). These materials have good fluidity and adhesion, and can fully penetrate into the depths of the gaps under gravity. After curing, they form an elastic sealing layer, which not only fills the gaps that cannot be eliminated by mechanical connection and blocks the water seepage channel, but also adapts to the slight deformation caused by the settlement of the reservoir foundation or temperature changes, preventing the gaps from reappearing due to structural displacement. At the same time, the asphalt-based materials have good compatibility with the seepage prevention surface layer 01 (such as asphalt concrete), and can form a continuous seepage prevention system, so that the seepage prevention performance at the splice is consistent with the base plate body. Ultimately, the mechanical connection ensures structural stability and the material filling strengthens the seepage prevention and sealing effect, taking into account the efficiency of prefabricated construction and the reliability of seepage prevention function.

[0042] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A seepage-proof structure, characterized in that, The system includes a node core base plate (15), an auxiliary base plate (16), and a connector (04). The bottom periphery of the node core base plate (15) extends horizontally to form a protrusion (05). The bottom periphery of the auxiliary base plate (16) is provided with a recess (06) that matches the protrusion (05). The node core base plate (15) and the auxiliary base plate (16) are connected by the connector (04). The protrusion (05) is disposed in the recess (06).

2. The seepage-proof structure according to claim 1, characterized in that, The node core base plate (15) and the auxiliary base plate (16) respectively include a seepage-proof surface layer (01), a support layer (02) and a leveling layer (03). The support layer (02) is disposed between the leveling layer (03) and the seepage-proof surface layer (01). The leveling layer (03) of the node core base plate (15) extends horizontally to form the protrusion (05). The leveling layer (03) of the auxiliary base plate (16) is provided with the recess (06) matching the protrusion (05) around its perimeter. The main outline of the node core base plate (15) and the auxiliary base plate (16) is rectangular.

3. The seepage-proof structure according to claim 2, characterized in that, It also includes a first sleeve (08) and a bolt (09). The first sleeve (08) is provided at the four corners of the interior of the support layer (02). The axis of the first sleeve (08) is parallel to the vertical direction. The flat layer (03) and the first sleeve (08) are provided with threaded through holes (14). The bolt (09) passes through the first sleeve (08) and is threadedly connected to the threaded through holes (14).

4. The seepage-proof structure according to claim 3, characterized in that, It also includes a second sleeve (10), which is provided in the middle between the two first sleeves (08) near the side of the support layer (02). The axis of the second sleeve (10) is perpendicular to the side. The second sleeve (10) is provided with an internal thread. The connector (04) is provided with an external thread that matches the internal thread. The connector (04) passes through the support layer (02) and is threadedly connected to the second sleeve (10).

5. The seepage-proof structure according to claim 4, characterized in that, The side of the support layer (02) is provided with a through hole (07) communicating with the second sleeve (10). The diameter of the through hole (07) matches the outer diameter of the connector (04). The connector (04) passes through the through hole (07) and is threadedly connected to the second sleeve (10).

6. The seepage-proof structure according to claim 4, characterized in that, It also includes reinforcing bars (11), two of which are respectively disposed above and below the second sleeve (10), and the two ends of the reinforcing bars (11) are respectively connected to the first sleeve (08) on both sides of the second sleeve (10).

7. The seepage-proof structure according to claim 2, characterized in that, The upper surface of the support layer (02) is provided with a first corrugated protrusion (12), and the lower surface of the impermeable surface layer (01) is provided with a second corrugated protrusion (13) that matches the first corrugated protrusion (12). The first corrugated protrusion (12) of the support layer (02) and the second corrugated protrusion (13) of the impermeable surface layer (01) are connected in a cooperative manner.

8. The seepage-proof structure according to claim 2, characterized in that, The leveling layer (03) is made of a rigid material, and / or the impermeable surface layer (01) is made of an impermeable material.

9. A seepage-proof base plate for a pumped storage power station, characterized in that, Including the seepage-proof structure as described in any one of claims 1 to 8.

10. A construction method for an anti-seepage base slab of a pumped storage power station, characterized in that, Based on the seepage-proof structure as described in any one of claims 1 to 8, the construction method of the seepage-proof base slab includes: According to the design requirements obtained, the node core base plate (15) and the auxiliary base plate (16) are spliced ​​together by connectors (04), and the gaps between adjacent node core base plates (15) and auxiliary base plates (16) are filled with asphalt-based cementitious materials.

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