Pumped storage power station tail gate hole beamless arch waterproof roof steel structure

Abstract

The utility model discloses a kind of pumped storage power station tail gate hole beamless arch waterproof roof steel structures, including arched waterproof roof, the upper cover of arched waterproof roof is equipped with protective net, arched waterproof roof includes a plurality of sequentially connected arched corrugated steel plate, the bottom of the both sides of arched corrugated steel plate is respectively fixed with one gutter, multiple steel columns are symmetrically arranged on the concrete bridge machine rock anchor beam of the both sides in tail gate hole, two gutters are respectively fixedly installed on the steel column of the both sides in tail gate hole, and multiple steel columns of the same side of tail gate hole are connected and fixed by multiple steel beams. The utility model has high structural strength, light material weight, easy and fast installation, can effectively isolate tail gate hole top arch and tail gate hole, drain top arch rock wall seepage to tail gate hole drainage ditch, avoid the influence of tail gate hole top arch seepage on equipment operation, and can reduce a large amount of construction materials and labor input, save construction cost, and reduce construction safety risk.

Description

Technical Field

[0001] This utility model belongs to the technical field of waterproof roof arch of the tail gate of a pumped storage power station, specifically relating to a steel structure of a beamless arch waterproof roof of the tail gate of a pumped storage power station. Background Technology

[0002] The underground powerhouse system of the pumped storage power station consists of three main tunnels (main and auxiliary powerhouse tunnels, main transformer tunnel, and tailgate tunnel), as well as auxiliary tunnels such as busbar tunnels, 500kV outgoing line tunnels, access tunnels, ventilation and safety tunnels, and drainage corridors. The tailgate tunnel is arranged parallel to the main and auxiliary powerhouse tunnels and the main transformer tunnel, located downstream of the main transformer tunnel. The tailgate tunnel houses tailwater emergency gates, a seepage drainage system, and a fire alarm system. To prevent water seepage from the roof arch of the tailgate tunnel from damaging the equipment and electrical installations inside, a waterproof roof structure must be installed on the roof arch.

[0003] In the existing technology, there are two main types of waterproof roof structures for the tailgate tunnel arch: one is to use a concrete structure for lining construction, and the other is to use a combination of steel arch frame and aluminum single-panel roof construction.

[0004] The above two traditional construction methods have the following limitations: (1) Concrete lining structure construction requires the erection of full-span scaffolding in the tail gate tunnel, which results in a long construction period, large resource investment, high construction risk coefficient, and affects the installation of equipment in the tail gate tunnel; (2) Steel arch frame structure construction has a complex roof structure, which requires a lot of materials and human resources, resulting in a large cost expenditure. Utility Model Content

[0005] The technical problem this utility model aims to solve is to address the shortcomings of the existing technology by providing a beamless arch waterproof roof steel structure for the tailgate of a pumped storage power station. This structure boasts high structural strength, lightweight materials, and convenient and quick installation. The arched waterproof roof and protective netting effectively isolate the tailgate arch from the interior of the tailgate, diverting seepage water from the arch's rock wall to the tailgate's drainage ditch, thus preventing the impact of seepage on equipment operation. Furthermore, all components can be prefabricated in the factory and only need to be transported to the installation site and hoisted onto the tailgate's bridge crane platform for installation. This eliminates the need for full-span scaffolding inside the tailgate, significantly reducing the input of construction materials and labor, saving construction costs, and lowering construction safety risks.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate, comprising an arched waterproof roof installed inside the tailgate and covering the bridge crane of the tailgate, a protective net covering the top of the arched waterproof roof, the protective net being installed on the top arch of the tailgate and fixed with the anchor bolts of the arch system, the arched waterproof roof comprising multiple arched corrugated steel plates connected in sequence, a gutter being fixed at the bottom of each side of the arched corrugated steel plate, multiple steel columns being symmetrically arranged on the rock anchor beams of the bridge crane on both sides of the tailgate, two of the gutters being fixedly installed on the steel columns on both sides of the tailgate, multiple steel columns on the same side of the tailgate being connected and fixed by multiple steel beams, multiple roof inspection holes being evenly arranged on the arched waterproof roof, a steel ladder being installed at the bottom of the roof inspection hole, the steel ladder being fixed to the side of the steel column adjacent to it.

[0007] The above-mentioned steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate has a steel column base plate at the bottom of the steel column. The steel column base plate is fixed to the bridge rock anchor beams upstream and downstream of the tailgate by anchor bolts. The side of the steel column is fixed to the rock wall inside the tailgate by anchor bolts.

[0008] The aforementioned steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate tunnel includes steel columns and steel beams connected by high-strength connecting bolts.

[0009] The above-mentioned steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate tunnel includes a stainless steel gutter that is welded to the top of a steel column, and an arched corrugated steel plate that is connected to the side of the gutter by self-drilling nails.

[0010] The above-mentioned steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate has multiple downpipes at the bottom of the gutter, and the downpipes have a slope along the longitudinal direction of the tailgate for easy drainage.

[0011] The above-mentioned steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate includes a protective net comprising a wire rope strand net, a wire mesh grid set on the upper layer of the wire rope strand net, and transverse and longitudinal support ropes for supporting the wire rope strand net and the wire mesh grid. The mesh size of the wire mesh grid is smaller than that of the wire rope strand net.

[0012] The above-mentioned steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate tunnel includes a wire rope cable net consisting of crisscrossing wire ropes forming a hanging net unit. The wire rope cable net is connected and tightened to both the transverse and longitudinal support ropes using stitched ropes.

[0013] The above-mentioned steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate includes a steel wire mesh comprising multiple steel wire mesh segments connected in sequence. The overlap width between two adjacent steel wire mesh segments is not less than 5cm. The steel wire mesh segments are tied together with each other and with the transverse and longitudinal support ropes using tie wires.

[0014] This utility model has the following advantages compared with the prior art: This utility model features high structural strength, lightweight materials, and convenient and quick installation. The arched waterproof canopy and protective net effectively isolate the top arch of the tailgate tunnel from the interior of the tailgate tunnel, diverting seepage water from the top arch rock wall to the drainage ditch of the tailgate tunnel. This avoids the impact of seepage water from the top arch of the tailgate tunnel on equipment operation. Furthermore, all components can be prefabricated in the factory and only need to be transported to the installation site and hoisted onto the tailgate tunnel bridge crane construction platform for installation. There is no need to erect full-span scaffolding inside the tailgate tunnel, which can reduce the input of a large amount of construction materials and labor, save construction costs, and reduce construction safety risks.

[0015] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the installation structure of the steel ladder of this utility model.

[0018] Figure 3 This is a schematic diagram of the connection structure between the arched corrugated steel plate and the gutter of this utility model.

[0019] Figure 4 This is a schematic diagram showing the layout of the inspection holes on the roof of this utility model.

[0020] Figure 5 This is a perspective view of the connection structure of the arched corrugated steel plate, gutter, and column of this utility model.

[0021] Figure 6 This is a schematic diagram of the installation structure of the downpipe of this utility model.

[0022] Figure 7 This is a schematic diagram of the structure of the protective net of this utility model.

[0023] Figure 8 This is a schematic diagram of the installation structure of the protective netting of this utility model.

[0024] Explanation of reference numerals in the attached figures: 1. Bridge crane rock anchor beam; 2. Tail gate tunnel bridge crane; 3. Arch roof system anchor bolts; 4. Steel column footing plate; 5. Steel column; 6. Steel beam; 7. Gutter; 8. Arched corrugated steel plate; 9. Roof inspection hole; 10. Steel ladder; 11. Tail gate tunnel arch; 12. Self-drilling nail; 13. Downpipe; 14. Steel wire rope strand net; 15. Steel wire mesh; 16. Lateral support rope; 17. Longitudinal support rope; 18. Stitching rope. Detailed Implementation

[0025] like Figures 1 to 8 As shown, this utility model includes an arched waterproof canopy installed inside the tailgate tunnel and covering the tailgate tunnel bridge crane 2. A protective net is installed on the top of the arched waterproof canopy. The protective net is installed on the top arch 11 of the tailgate tunnel and fixed to the arch system anchor rod 3. The arched waterproof canopy includes multiple arched corrugated steel plates 8 connected in sequence. A gutter 7 is fixed to the bottom of each side of the arched corrugated steel plate 8. Multiple steel columns 5 are symmetrically arranged on the concrete bridge crane rock anchor beams 1 on both sides of the tailgate tunnel. Two gutters 7 are fixedly installed on the steel columns 5 on both sides of the tailgate tunnel. Multiple steel columns 5 on the same side of the tailgate tunnel are connected and fixed by multiple steel beams 6. Multiple roof inspection holes 9 are evenly arranged on the arched waterproof canopy. A steel ladder 10 is installed at the bottom of the roof inspection hole 9. The steel ladder 10 is fixed to the side of the steel column 5 that is close to it.

[0026] In this embodiment, the bottom of the steel column 5 is provided with a steel column foot foundation plate 4, which is fixed to the bridge crane rock anchor beam 1 upstream and downstream of the tailgate tunnel by anchor bolts, and the side of the steel column 5 is fixed to the rock wall inside the tailgate tunnel by anchor bolts.

[0027] In this embodiment, the steel column 5 and the steel beam 6 are connected by high-strength connecting bolts.

[0028] like Figure 3 As shown, in this embodiment, the gutter 7 is a stainless steel gutter and it is welded to the top of the steel column 5. The arched corrugated steel plate 8 is connected to the side of the gutter 7 by self-drilling nails 12.

[0029] like Figure 6 As shown, in this embodiment, the bottom of the gutter 7 is provided with multiple downpipes 13. The downpipes 13 have a certain slope along the longitudinal direction of the tail gate tunnel to facilitate drainage. They are used to drain the seepage water from the top arch of the tail gate tunnel. The downpipes 13 are connected from the gutter 7 and are led along the direction of the tail gate bridge rock anchor beam at a certain slope to the ground drainage ditch of the tail gate tunnel.

[0030] like Figure 7 and Figure 8As shown, in this embodiment, the protective net includes a wire rope twisted net 14, a wire mesh 15 disposed on the upper layer of the wire rope twisted net 14, and a transverse support rope 16 and a longitudinal support rope 17 for supporting the wire rope twisted net 14 and the wire mesh 15. The mesh size of the wire mesh 15 is smaller than that of the wire rope twisted net 14.

[0031] In this embodiment, the wire rope winch net 14 is a hanging net unit composed of crisscrossing wire ropes. The wire rope winch net 14 is connected and tightened with the transverse support rope 16 and the longitudinal support rope 17 by stitching rope 18, thereby improving the stability of the surface of the arch rock mass at the top of the tailgate tunnel, preventing the occurrence of collapse and falling rocks as much as possible, and restricting the movement of a small portion of the falling rocks within a certain space.

[0032] like Figure 7 As shown, in this embodiment, the wire mesh 15 includes multiple wire mesh segments connected in sequence. The overlap width between two adjacent wire mesh segments is not less than 5cm. The two adjacent wire mesh segments and the wire mesh 15 are tied together with the transverse support rope 16 and the longitudinal support rope 17 using tie wire.

[0033] In actual use, the steel column 5 is fixed to the rock wall with steel column fixing chemical anchors on the side to increase structural stability; the two adjacent arched corrugated steel plates 8 are pressed and fixed with a seam locking machine.

[0034] In practice, steel columns 5 are made of hot-dip galvanized square steel pipes, and steel beams 6 are made of hot-dip galvanized H-beams. The sides of steel columns 5 are fixed to the tailgate tunnel wall using chemical anchor bolts. The arched corrugated steel plate 8 is made of thin-walled metal steel sheet, and its arch dimensions are designed according to the span and crown height of the tailgate tunnel structure. The arched corrugated steel plate 8 has high structural strength and does not require steel arch supports during installation. It uses simple materials, has high construction efficiency, and low cost, making it innovative compared to traditional construction methods.

[0035] In practice, the arched corrugated steel sheet 8 is made of approximately 1mm thick metal steel sheet through a forming process. Its unique corrugated structure forms an arch, increasing structural strength. The top arch can withstand a uniformly distributed live load of 0.50KN / ㎡ on the roof. Both ends of the arched corrugated steel sheet are fixed to stainless steel gutters using self-drilling screws. Adjacent arched corrugated steel sheets are interlocked and secured using a forming sheet seam locking machine, ensuring a tight, seamless connection at all joints.

[0036] It should be noted that roof inspection holes 9 are opened at certain intervals along the extension direction of the arched waterproof roof. A steel ladder 10 is installed at the bottom of the roof inspection hole 9. The steel ladder 10 is made of round steel and is welded to the side of the steel column 5.

[0037] In actual use, by covering the arched waterproof canopy with a protective net, the collapse of the top arch of the tailgate can be prevented. By laying a wire mesh 15 with small mesh size above the wire rope winch net 14, the collapse of small-sized rock blocks or the destruction of local soil and rock layers can be prevented.

[0038] In specific implementation, before installing the wire rope strand net 14, first install the transverse support rope 16 and the longitudinal support rope 17. After tensioning, use 4 rope clips at each end to securely connect to the exposed ring of the anchor rod 3 of the arch system. The spacing between the rope clips should be 6 to 7 times the diameter of the wire rope, and the U-bolt of the rope clip should be located on one side of the tail rope section. When installing the wire mesh 15, the overlap width between the wire mesh sections should not be less than 5cm. Use φ1.5mm binding wire to tie between two wire mesh sections or between the wire mesh 15 and the longitudinal / transverse support ropes. The tying spacing should generally not be greater than 1m.

[0039] It should be noted that the stitching rope 18 is a φ8mm steel wire rope, and the steel wire rope strand net 14 also includes multiple steel wire rope strand net segments connected in sequence. Each steel wire rope strand net segment is stitched with the stitching rope 18 and the surrounding transverse support ropes 16 or longitudinal support ropes 17 and pre-tensioned. The two ends of the stitching rope 18 are crossed, reversed and merged, and each end is fastened with two rope clips. The stitching rope 18 needs to be stitched twice at the four corner mesh holes, and the stitching rope 18 must not be directly connected to the arch system anchor rod 3.

[0040] In practical implementation, the tailgate arch of the pumped storage power station proposed in this utility model, composed of a beamless arched corrugated steel plate and steel structure supports, effectively isolates the tailgate arch from the interior of the tailgate, diverting seepage water from the arch's rock wall to the tailgate's drainage ditch, thus preventing the impact of seepage on equipment operation. Because all components of the beamless arch waterproof roof steel structure of this utility model can be prefabricated in the factory, they only need to be transported to the installation site and hoisted onto the tailgate's bridge crane platform for installation. There is no need to erect full-span scaffolding inside the tailgate. Furthermore, the roof is made of beamless arched corrugated steel plates, which can be clamped together with a seam-locking machine. This results in high structural strength, lightweight materials, convenient and quick installation, and eliminates the need for extensive steel arch reinforcement, thereby reducing the input of construction materials and labor, saving construction costs, and lowering construction safety risks.

[0041] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A beamless arch waterproof steel structure for the tailgate tunnel of a pumped storage power station, characterized in that: The structure includes an arched waterproof canopy installed inside the tailgate tunnel and covering the tailgate tunnel bridge machine (2). A protective net is installed on the top of the arched waterproof canopy. The protective net is installed on the top arch (11) of the tailgate tunnel and fixed with the arch top system anchor rod (3). The arched waterproof canopy includes multiple arched corrugated steel plates (8) connected in sequence. A gutter (7) is fixed on the bottom of each side of the arched corrugated steel plate (8). Multiple steel columns (5) are symmetrically arranged on the bridge machine rock anchor beams (1) on both sides of the tailgate tunnel. The two gutters (7) are fixed on the steel columns (5) on both sides of the tailgate tunnel. Multiple steel columns (5) on the same side of the tailgate tunnel are connected and fixed by multiple steel beams (6). Multiple roof inspection holes (9) are evenly arranged on the arched waterproof canopy. A steel ladder (10) is installed at the bottom of the roof inspection hole (9). The steel ladder (10) is fixed to the side of the steel column (5) close to it.

2. The steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate tunnel according to claim 1, characterized in that: The bottom of the steel column (5) is provided with a steel column foot foundation plate (4), which is fixed to the bridge machine rock anchor beam (1) upstream and downstream of the tail gate tunnel by anchor bolts. The side of the steel column (5) is fixed to the rock wall inside the tail gate tunnel by anchor bolts.

3. The steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate tunnel according to claim 1, characterized in that: The steel column (5) and the steel beam (6) are connected by high-strength connecting bolts.

4. The steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate tunnel as described in claim 1, characterized in that: The gutter (7) is a stainless steel gutter and is welded to the top of the steel column (5). The arched corrugated steel plate (8) is connected to the side of the gutter (7) by a self-drilling nail (12).

5. A beamless arch waterproof steel structure for the tailgate tunnel of a pumped storage power station according to claim 1, characterized in that: The bottom of the gutter (7) is provided with multiple downpipes (13), which have a slope along the longitudinal direction of the tail gate tunnel to facilitate drainage.

6. The steel structure for a beamless arch waterproof roof of a pumped storage power station tailgate tunnel according to claim 1, characterized in that: The protective net includes a wire rope strand net (14), a wire mesh grid (15) set on the upper layer of the wire rope strand net (14), and a transverse support rope (16) and a longitudinal support rope (17) for supporting the wire rope strand net (14) and the wire mesh grid (15). The mesh size of the wire mesh grid (15) is smaller than that of the wire rope strand net (14).

7. A beamless arch waterproof steel structure for the tailgate tunnel of a pumped storage power station according to claim 6, characterized in that: The wire rope twisted net (14) is a hanging net unit composed of crisscrossing wire ropes. The wire rope twisted net (14) is connected and tightened with the transverse support rope (16) and the longitudinal support rope (17) by stitching rope (18).

8. A beamless arch waterproof steel structure for the tailgate tunnel of a pumped storage power station according to claim 6, characterized in that: The wire mesh (15) includes multiple wire mesh segments connected in sequence. The overlap width between two adjacent wire mesh segments is not less than 5cm. The two adjacent wire mesh segments and the wire mesh (15) are tied together with the transverse support rope (16) and the longitudinal support rope (17) using tie wire.

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