A combined structure of an underground structure of a booster station and a design method

Abstract

The application relates to the technical field of booster station construction, in particular to a booster station underground structure combined construction structure and a design method thereof. The combined construction structure comprises an underground structure, an aboveground building, a fence and a retaining wall. The retaining wall is arranged in a foundation pit, the underground structure is arranged on the inner side of the retaining wall, the side wall of the underground structure is extended and constructed on the structure of the retaining wall, the fence is extended and constructed above the retaining wall, the aboveground building takes the fence as a back side wall, the bottom of the aboveground building is the top of the underground structure, the other three side walls of the aboveground building are extended and constructed on the basis of the side walls of the underground structure, and the underground structure, the aboveground building and the fence are all extended and arranged on the basis of the retaining wall as integrated construction. The underground structure and the aboveground structure are spatially integrated, and the land utilization rate is improved.

Description

Technical Field

[0001] This invention relates to the field of substation construction technology, and in particular to a combined underground structure and design method for a substation. Background Technology

[0002] A step-up substation is the core hub of a new energy power plant (photovoltaic, wind power, energy storage), responsible for voltage transformation and power collection and transmission. A step-up substation mainly consists of a production system and auxiliary systems: the production system includes a production building and outdoor / underground equipment (GIS, main transformer, SVG, emergency oil tank, fire water tank, etc.); the auxiliary systems are concentrated in a comprehensive building used for offices and living quarters.

[0003] With the large-scale development of new energy power plants, the constraints of land resources for substations are becoming increasingly prominent. Their internal underground structures, such as fire-fighting water tanks and emergency oil tanks, occupy large areas and are scattered in their layout. Traditional separate construction methods result in low land utilization, high engineering costs, and complex construction interfaces. Under the dual pressures of scarce land resources and cost reduction and efficiency improvement, exploring spatial integration technologies (joint construction technologies) between underground structures and above-ground structures has urgent engineering value.

[0004] Therefore, there is an urgent need to provide a combined underground structure and design method for substations that integrates underground structures with above-ground structures to improve land utilization compared to existing technologies. Summary of the Invention

[0005] This invention addresses the technical problems existing in the prior art and provides a combined underground structure and design method for a booster station.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A combined underground structure for a substation includes an underground structure, an above-ground building, a perimeter wall, and a retaining wall. The retaining wall is located within a foundation pit, and the underground structure is situated inside the retaining wall. The sidewalls of the underground structure extend from the structure of the retaining wall. The perimeter wall extends above the retaining wall. The above-ground building has the retaining wall as its rear sidewall, and its bottom forms the top of the underground structure. The other three sidewalls of the above-ground building extend from the sidewalls of the underground structure. The underground structure, the above-ground building, and the perimeter wall are all extended from the retaining wall and constructed as an integrated unit.

[0007] Furthermore, the retaining wall includes a wall panel, a heel plate, a buttress, and a toe plate. The wall panel is vertically arranged, and the heel plate and the toe plate are integrally connected below the wall panel. The heel plate and the toe plate extend in two directions toward the wall panel, and multiple buttresses are integrally connected between the wall panel and the heel plate.

[0008] Furthermore, the extension length of the heel plate relative to the wall panel is greater than the extension length of the toe plate relative to the wall panel, and the wall panel is perpendicular to both the heel plate and the toe plate.

[0009] Furthermore, the underground structure includes an emergency oil tank and a fire water tank. The sidewall of the emergency oil tank is constructed by pouring reinforced concrete on the buttress. The emergency oil tank and the fire water tank are located adjacent to each other. The fire water tank is also constructed by pouring reinforced concrete on the buttress. The emergency oil tank and the fire water tank share a sidewall.

[0010] Furthermore, the tops of the accident oil tank and the fire water tank are constructed by pouring reinforced concrete, and the tops of the accident oil tank and the fire water tank serve as the base of the above-ground building.

[0011] Furthermore, the accident oil tank and the fire water tank are set above the station's ground level, or are set at the same level as the station's ground level.

[0012] Furthermore, the aforementioned buildings include a diesel generator room, a fire pump room, a first warehouse, and a second warehouse. The diesel generator room is located directly above the accident oil tank, and the fire pump room, the first warehouse, and the second warehouse are all located directly above the fire water tank.

[0013] A design method for a combined underground structure of a substation includes the following steps: S1. Construct a retaining wall in the foundation pit, so that the heel plate and toe plate of the retaining wall are located at the bottom of the foundation pit. Extend the steel bars at the top of the wall panel, the steel bars on the side of a set of adjacent buttresses, and the steel bars on the side of the buttress that is separated from one of the adjacent buttresses by two buttresses to the poured concrete. S2. Based on the adjacent buttress, extend the side reinforcement and pour concrete reinforcement to form the other three side walls of the accident oil pool, so that the other side wall of the accident oil pool is a wall panel; extend the reinforcement at the upper end of the side wall of the accident oil pool upward to the poured concrete. S3. Based on the buttresses that are spaced apart from the adjacent buttresses, extend the steel bars on their sides and pour concrete to form two side walls of the fire water tank, so that the other two side walls of the fire water tank are wall panels and one side wall of the emergency oil tank; extend the steel bars at the upper end of the side walls of the fire water tank upwards to form the poured concrete. S4. Pour concrete reinforcement at the top of the accident oil tank and fire water tank, and make the reinforcement extending from steps S2 and S3 and the reinforcement at the top of the wall in step S1 pass through the concrete pouring at the top. S5. Based on the steel bars passed through in step S4, the perimeter wall and the side walls of the above-ground building are poured with reinforced concrete. Then, the top of the above-ground building is poured at the top of the side walls of the above-ground building to complete the joint construction.

[0014] Furthermore, when the height of the wall is greater than or equal to 2m, the thickness of the concrete within the top 0.5-1m range of the wall panel is increased by 50-100mm; the vertical reinforcing bars passing through in step S4 are set to have a diameter greater than or equal to 12mm, and the length of the vertical reinforcing bars anchored inside the wall panel is greater than or equal to 35*d, where d is the diameter of the reinforcing bar, and the length of each vertical reinforcing bar extending beyond the top of the retaining wall is greater than or equal to 500mm.

[0015] Furthermore, multiple horizontal reinforcing bars are installed between the vertical reinforcing bars at the top of the buttress. The vertical reinforcing bars at the top of the buttress and the horizontal reinforcing bars are staggered to form closed stirrups with the horizontal reinforcing bars in the wall panel. Tie bars are pre-embedded every 500-600mm along the length of the top of the retaining wall. One end of the tie bar is anchored in the wall panel of the retaining wall, and the other end extends into the mortar joint of the wall masonry. The length of the tie bar extending into the mortar joint of the wall masonry is greater than or equal to 1000mm.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention eliminates the gaps between various underground structures and above-ground buildings, enabling the co-construction of each underground structure with retaining walls, between underground structures and above-ground buildings, between retaining walls and perimeter walls, and between each above-ground building. This effectively improves building rigidity, reduces earthwork excavation / backfilling, concrete volume, formwork, and steel reinforcement, lowers project costs, shortens construction time, simplifies construction procedures, reduces overlapping operations, and increases the degree of prefabrication of components. It also improves structural efficiency, enhancing the overall rigidity of the integrated structure, making stress distribution more rational, and improving earthquake and deformation resistance. Furthermore, it is environmentally friendly, reducing land disturbance and the amount of excavated soil and construction waste, aligning with green building principles. Power plant operation and maintenance are convenient, with a compact and clear layout, shortened inspection paths, and reduced project lifecycle maintenance costs. Attached Figure Description

[0017] Figure 1 This is the overall elevation view of the combined structure of the present invention.

[0018] Figure 2 This is a bottom view of the underground structure of the present invention.

[0019] Figure 3 This is the present invention. Figure 2 Sectional view along the AA direction.

[0020] Figure 4 This is the present invention. Figure 2 Sectional view along the BB direction.

[0021] Explanation of reference numerals in the attached figures: 1. Retaining wall; 11. Wall panel; 12. Heel plate; 13. Buttress; 14. Toe plate; 2. Accident oil tank; 21. Accident tank wall; 3. Fire water tank; 31. Fire water tank wall; 4. Enclosure wall; 5. Diesel generator room; 6. Fire pump room; 7. First warehouse; 8. Second warehouse; 9. Above-ground building. Detailed Implementation

[0022] The technical solution of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] like Figure 1 As shown, the present invention provides a combined underground structure for a substation, including underground structures, above-ground buildings, a perimeter wall, and a retaining wall. The retaining wall is located within the foundation pit, and the underground structures are located inside the retaining wall. The side walls of the underground structures extend from the structure of the retaining wall. The perimeter wall extends above the retaining wall. The above-ground buildings have the retaining wall as their rear side walls. The bottom of the above-ground buildings and the top of the underground structures are one. The other three side walls of the above-ground buildings extend from the side walls of the underground structures, so that the underground structures, above-ground buildings, and perimeter walls are all extended from the retaining wall, forming an integrated construction.

[0024] like Figure 2 As shown, the retaining wall is a buttress type, including a wall panel, a heel plate, buttresses, and a toe plate. The wall panel is set vertically, and the heel plate and toe plate are integrally connected below the wall panel. The heel plate and toe plate extend in two directions toward the wall panel, with the heel plate extending longer than the toe plate. The wall panel is set vertically to both the heel plate and the toe plate. Multiple buttresses are integrally connected between the wall panel and the heel plate. Each buttress is set vertically to both the wall panel and the heel plate. The multiple buttresses are spaced apart and evenly distributed.

[0025] The underground structures include an emergency oil tank and a fire water tank. The sidewalls of the emergency oil tank are constructed by extending reinforced concrete on a set of adjacent buttresses, thus forming the sidewalls of the emergency oil tank and enclosing an independent space. The fire water tank is located adjacent to the emergency oil tank, and the emergency oil tank and the fire water tank share a sidewall. One sidewall of the emergency oil tank and the fire water tank is a wall panel. The sidewall of the fire water tank is constructed by extending reinforced concrete on buttresses spaced two apart, thus forming the sidewalls of the fire water tank and enclosing an independent space. The tops of the emergency oil tank and the fire water tank are also constructed by reinforcing concrete. The emergency oil tank and the fire water tank can be installed above the station's ground level or at the same level as the station's ground level. The tops of the emergency oil tank and the fire water tank serve as the base of the above-ground buildings.

[0026] like Figure 3 , Figure 4 As shown, the above-ground structure includes a diesel generator room, a fire pump room, a first warehouse, and a second warehouse. The diesel generator room is located directly above the emergency oil tank. The fire pump room, the first warehouse, and the second warehouse are located directly above the fire water tank. The diesel generator room, the fire pump room, the first warehouse, and the second warehouse are arranged sequentially. A reinforced concrete wall is constructed on top of the wall panels, serving as the rear side wall of the above-ground structure. The other side walls of the above-ground structure are constructed by reinforcing concrete on the side walls of the emergency oil tank and the fire water tank. Finally, the top structure of the above-ground structure is constructed by reinforcing concrete, thus completing the entire combined structure.

[0027] This invention also provides a design method for a combined underground structure of a booster station, comprising the following steps: S1. Construct retaining walls within the foundation pit, ensuring that the heel and toe plates of the retaining walls are located at the bottom of the foundation pit. Extend the reinforcing bars at the top of the wall panel, the reinforcing bars on the sides of a group of adjacent buttresses, and the reinforcing bars on the sides of the buttresses that are spaced two buttresses apart from one of the buttresses in this group of buttresses, into the poured concrete.

[0028] S2. Based on the adjacent buttress, extend the side reinforcement and pour concrete reinforcement to form the other three side walls of the accident oil pool, so that the other side wall of the accident oil pool is a wall panel; extend the reinforcement at the upper end of the side wall of the accident oil pool upward to the poured concrete.

[0029] S3. Based on the buttress that is spaced apart from the adjacent buttress, extend the steel bars on its side and pour concrete reinforcement to form two side walls of the fire water tank, so that the other two side walls of the fire water tank are wall panels and one side wall of the emergency oil tank; extend the steel bars at the upper end of the side wall of the fire water tank upwards through the poured concrete.

[0030] S4. Pour concrete reinforcement at the top of the accident oil tank and fire water tank, and make the reinforcement extending from steps S2 and S3 and the reinforcement at the top of the wall in step S1 pass through the concrete pouring at the top.

[0031] S5. Based on the steel bars passed through in step S4, the perimeter wall and the side walls of the above-ground building are poured with reinforced concrete. Then, the top of the above-ground building is poured on the upper part of the side walls of the above-ground building to complete the joint construction.

[0032] In the joint construction, the structure of the pool wall on the adjacent boundary is strengthened by increasing the reinforcement and concrete thickness, enabling it to withstand the vertical load and horizontal force (wind load) of the enclosure wall. The specific method is as follows: (1) When the height of the wall is greater than or equal to 2m, the thickness of the concrete in the top 0.5-1m range of the wall panel shall be increased by 50-100mm.

[0033] (2) The vertical steel bars passing through in step S4 have a diameter of greater than or equal to 12mm, and the length of the vertical steel bars anchored inside the wall panel is greater than or equal to 35*d, where d is the diameter of the steel bar, and the length of each vertical steel bar extending out of the upper end of the retaining wall is greater than or equal to 500mm.

[0034] (3) Multiple horizontal reinforcing bars are set between the vertical reinforcing bars at the top of the buttress. The vertical reinforcing bars at the top of the buttress and the horizontal reinforcing bars are staggered and form closed stirrups with the horizontal reinforcing bars in the wall panel to improve the load-bearing capacity of the buttress to the top load and avoid cracks at the junction of the buttress and the wall panel.

[0035] (4) Along the length of the top of the retaining wall, tie bars are pre-embedded every 500-600mm. One end of the tie bar is anchored in the wall panel of the retaining wall, and the other end extends into the mortar joint of the wall. The length of the tie bar extending into the mortar joint of the wall is greater than or equal to 1000mm, which can prevent the wall and the retaining wall from separating horizontally.

[0036] This invention eliminates the gaps between various underground structures and above-ground buildings, enabling the co-construction of each underground structure with retaining walls, between underground structures and above-ground buildings, between retaining walls and perimeter walls, and between each above-ground building. This effectively improves building rigidity, reduces earthwork excavation / backfilling, concrete volume, formwork, and steel reinforcement, lowers project costs, shortens construction time, simplifies construction procedures, reduces overlapping operations, and increases the degree of prefabrication of components. It also improves structural efficiency, enhancing the overall rigidity of the integrated structure, making stress distribution more rational, and improving earthquake and deformation resistance. Furthermore, it is environmentally friendly, reducing land disturbance and the amount of excavated soil and construction waste, aligning with green building principles. Power plant operation and maintenance are convenient, with a compact and clear layout, shortened inspection paths, and reduced project lifecycle maintenance costs.

[0037] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A combined underground structure for a booster station, characterized in that, The project includes underground structures, above-ground buildings, a perimeter wall, and a retaining wall. The retaining wall is located within the foundation pit. The underground structures are located inside the retaining wall. The sidewalls of the underground structures extend from the structure of the retaining wall. The perimeter wall extends above the retaining wall. The above-ground buildings have the retaining wall as their rear sidewalls. The bottom of the above-ground buildings forms the top of the underground structures. The other three sidewalls of the above-ground buildings extend from the sidewalls of the underground structures. The underground structures, the above-ground buildings, and the perimeter wall are all extended from the retaining wall and are constructed as an integrated unit.

2. The combined underground structure of a booster station according to claim 1, characterized in that, The retaining wall includes a wall panel, a heel plate, a buttress, and a toe plate. The wall panel is vertically arranged, and the heel plate and the toe plate are integrally connected below the wall panel. The heel plate and the toe plate extend in two directions toward the wall panel, and multiple buttresses are integrally connected between the wall panel and the heel plate.

3. The combined underground structure of a booster station according to claim 2, characterized in that, The extension length of the heel plate relative to the wall panel is greater than the extension length of the toe plate relative to the wall panel, and the wall panel is perpendicular to both the heel plate and the toe plate.

4. The combined underground structure of a booster station according to claim 2, characterized in that, The underground structure includes an emergency oil tank and a fire water tank. The sidewall of the emergency oil tank is constructed by pouring reinforced concrete on the buttress. The emergency oil tank and the fire water tank are located adjacent to each other. The fire water tank is also constructed by pouring reinforced concrete on the buttress. The emergency oil tank and the fire water tank share a sidewall.

5. The combined underground structure of a booster station according to claim 4, characterized in that, The tops of the accident oil tank and the fire water tank are constructed by pouring reinforced concrete, and the tops of the accident oil tank and the fire water tank serve as the base of the above-ground building.

6. The combined underground structure of a booster station according to claim 5, characterized in that, The accident oil tank and the fire water tank are set above the station's ground level, or they are set at the same level as the station's ground level.

7. The combined underground structure of a booster station according to claim 4, characterized in that, The aforementioned buildings include a diesel generator room, a fire pump room, a first warehouse, and a second warehouse. The diesel generator room is located directly above the accident oil tank, and the fire pump room, the first warehouse, and the second warehouse are all located directly above the fire water tank.

8. The design method for a combined underground structure of a booster station as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Construct a retaining wall in the foundation pit, so that the heel plate and toe plate of the retaining wall are located at the bottom of the foundation pit. Extend the steel bars at the top of the wall panel, the steel bars on the side of a set of adjacent buttresses, and the steel bars on the side of the buttress that is separated from the adjacent buttress by two buttresses to the poured concrete. S2. Based on the adjacent buttress, extend the side reinforcement and pour concrete reinforcement to form the other three side walls of the accident oil pool, so that the other side wall of the accident oil pool is a wall panel; extend the reinforcement at the upper end of the side wall of the accident oil pool upward to the poured concrete. S3. Based on the buttresses that are spaced apart from the adjacent buttresses, extend the steel bars on their sides and pour concrete to form two side walls of the fire water tank, so that the other two side walls of the fire water tank are wall panels and one side wall of the emergency oil tank; extend the steel bars at the upper end of the side walls of the fire water tank upwards to form the poured concrete. S4. Pour concrete reinforcement at the top of the accident oil tank and fire water tank, and make the reinforcement extending from steps S2 and S3 and the reinforcement at the top of the wall in step S1 pass through the concrete pouring at the top. S5. Based on the steel bars passed through in step S4, the perimeter wall and the side walls of the above-ground building are poured with reinforced concrete. Then, the top of the above-ground building is poured at the top of the side walls of the above-ground building to complete the joint construction.

9. The design method for a combined underground structure of a booster station according to claim 8, characterized in that, When the height of the wall is greater than or equal to 2m, the thickness of the concrete in the top 0.5-1m range of the wall panel is increased by 50-100mm; the vertical steel bars passing through in step S4 are set to have a diameter greater than or equal to 12mm, and the length of the vertical steel bars anchored inside the wall panel is greater than or equal to 35*d, where d is the diameter of the steel bar, and the length of each vertical steel bar extending out of the top of the retaining wall is greater than or equal to 500mm.

10. The design method for a combined underground structure of a booster station according to claim 8, characterized in that, Multiple horizontal reinforcing bars are installed between the vertical reinforcing bars at the top of the retaining wall. The vertical reinforcing bars at the top of the retaining wall are staggered with the horizontal reinforcing bars in the wall panel to form closed stirrups. Tie bars are pre-embedded every 500-600mm along the length of the top of the retaining wall. One end of the tie bar is anchored in the wall panel of the retaining wall, and the other end extends into the mortar joint of the wall masonry. The length of the tie bar extending into the mortar joint of the wall masonry is greater than or equal to 1000mm.

Images