Square steel lining with external pressure resistant reinforcing structure and tail water emergency gate

Abstract

The utility model provides a square steel lining with an external pressure resistant reinforcing structure and a tailrace emergency gate, a plurality of annular stiffening rings are arranged on the peripheral side of the square steel lining at intervals along the extension direction of the square steel lining, a plurality of anchor bars are arranged on the side of a web plate of each annular stiffening ring, the tops of the anchor bars are fixed on a reinforcing mesh, and the top of the reinforcing mesh is fixed on the reinforcing mesh. Pressure on the stiffening rings is transmitted to the reinforcing mesh through the anchor bars, so that the external pressure resistance of the square steel lining is enhanced; and the square steel lining is arranged along the water flow direction. The backfill concrete can be fully utilized, external pressure of the square steel lining is transmitted through stress of the stiffening rings, the anchor bars and the reinforcing mesh, tensile stress strength of the square steel lining and the anchor bars is fully exerted, and most external water pressure of the square steel lining is transmitted into the concrete, so that external pressure resistance instability of the steel lining can be prevented.

Description

Technical Field

[0001] The utility model belongs to water conservancy and hydropower engineering, in particular to hydraulic square high-pressure steel lining engineering with deep groundwater level, and specifically relates to a square steel lining with an external pressure-resistant reinforced structure and a tailwater accident gate. Background Art

[0002] When the surrounding rock of the pressure steel pipe is intact and the cracks are extremely undeveloped, once the high-pressure internal water enters the gap between the concrete wrapped around the steel lining section, a closed high-water pressure zone with a water head close to the internal pressure will be formed, causing the steel lining to become unstable against external pressure when the pressure is too high, or the pressure steel pipe welds will open or cracks will appear in the welds, or the welds will not be completely closed. If the decompression speed is too fast during the emptying of the high-pressure tunnel, the cracks in the concrete lining that originally became the infiltration channel of the internal water will close rapidly, and the penetration of the high-pressure external water into the tunnel through the cracks will be blocked. The closed high-pressure zone will maintain a relatively high external water pressure for a period of time, which may cause the pressure steel pipe to become unstable.

[0003] At present, in response to this situation, stiffening rings are installed or anchor bars are installed on the outside of the steel pipe. However, these two types of arrangements have failed to solve the instability problem of the square section. For example, the square pipe section of the tailwater accident gate shaft of the Xianyou Pumped Storage Power Station suffered from external pressure instability during the emptying process after the stiffening ring measure was adopted, and the square pipe section of the tailwater accident gate shaft of the Guangxu Phase I used anchor bars on the steel pipe wall during the emptying process. Utility Model Content

[0004] The first object of the utility model is to provide a square steel liner with an external pressure resistance reinforcement structure to improve the external pressure resistance of the square steel liner segment.

[0005] To this end, the above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0006] A square steel lining with an external pressure resistance reinforcement structure, wherein a plurality of annular stiffening rings are arranged at intervals along the extension direction of the square steel lining on its circumferential side, a plurality of anchor bars are arranged on the side of the web of each annular stiffening ring, and the top of the anchor bars is fixed to a steel mesh to transfer the pressure on the stiffening ring to the steel mesh via the anchor bars, so as to enhance the external pressure resistance of the square steel lining; the square steel lining is arranged along the direction of water flow.

[0007] There is a certain distance between the steel mesh and the top of the stiffening ring;

[0008] There is a certain distance between the bottom of the anchor bar and the pipe wall of the square steel liner.

[0009] While adopting the above technical solutions, the present invention can also adopt or combine the following technical solutions:

[0010] As a preferred technical solution of the utility model: the bottom of the stiffening ring is fully welded to the pipe wall of the square steel liner.

[0011] As a preferred technical solution of the utility model: two circumferentially adjacent anchor bars are respectively located on both sides of the web of the stiffening ring and are arranged alternately to prevent the stiffening ring from being lateral bent due to unilateral tension.

[0012] As a preferred technical solution of the utility model: a plurality of vent holes are provided on the stiffening ring, and at least three vent holes are provided on each stiffening ring to facilitate the compaction of concrete.

[0013] As a preferred technical solution of the utility model: the anchor bar is U-shaped and its opening is arranged toward the position where the square steel liner is located.

[0014] As a preferred technical solution of the utility model: the distance between the bottom of the anchor bar and the pipe wall of the square steel liner is 10 cm.

[0015] As a preferred technical solution of the utility model: the anchor bar and the stiffening ring are fully welded.

[0016] As a preferred technical solution of the utility model: the height of the weld between the anchor bar and the stiffening ring is half of the diameter of the anchor bar.

[0017] As a preferred technical solution of the utility model: the steel mesh includes a plurality of longitudinal steel bars and a plurality of circumferential steel bars welded to each other.

[0018] A plurality of longitudinal steel bars are arranged at intervals along the circumference of the square steel lining, and a single longitudinal steel bar is arranged along the extension direction of the square steel lining;

[0019] A plurality of annular steel bars are arranged at intervals in the extension direction of the square steel lining, and a single annular steel bar is arranged at intervals along the circumference of the square steel lining;

[0020] The top of a single anchor bar is fixed to two adjacent longitudinal steel bars respectively.

[0021] Another object of the utility model is to provide a tailwater accident gate.

[0022] To this end, the above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0023] A tailwater accident gate comprises a tailwater accident gate body, on which the square steel lining with the external pressure resistance reinforcement structure as described above is provided.

[0024] The utility model provides a square steel lining and a tailwater accident gate with an anti-external pressure reinforcement structure, which can make full use of backfill concrete, transmit the external pressure of the square steel lining through the force of stiffening rings, anchor bars and steel mesh, give full play to the tensile stress strength of the square steel lining and anchor bars, and transmit most of the external water pressure of the square steel lining to the concrete, thereby preventing the steel lining from becoming unstable against external pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A cross-sectional view of a square steel liner with an external pressure-resistant reinforcement structure provided by the utility model;

[0026] Figure 2 Detailed drawings of the connections between anchor bars, stiffening rings and steel mesh;

[0027] Figure 3 A partial top view of a square steel liner with an external pressure-resistant reinforcement structure provided by the utility model;

[0028] Figure 4 The welding details between the anchor bar and the stiffening ring;

[0029] In the figure: 1- square steel lining; 11- stiffening ring; 12- anchor bar; 13- steel mesh; 131- longitudinal steel bar; 132- circumferential steel bar. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

[0031] A tailwater accident gate comprises a tailwater accident gate body, wherein the tailwater accident gate body is provided with a square steel lining having an external pressure-resistant reinforcement structure.

[0032] The square steel liner with an external pressure-resistant reinforcement structure is provided with a plurality of annular stiffening rings 11 at intervals along its extension direction. A plurality of anchor bars 12 are provided on the side of the web of each annular stiffening ring 11. The top of the anchor bar 12 is fixed to the steel mesh 13.

[0033] There is a certain distance between the steel mesh 13 and the top of the stiffening ring 11;

[0034] There is a certain distance between the bottom of the anchor bar 12 and the pipe wall of the square steel liner.

[0035] The bottom of the stiffening ring 11 is fully welded to the pipe wall of the square steel liner.

[0036] A plurality of vent holes 111 are provided on the stiffening ring 11 . At least three vent holes 111 are provided on each stiffening ring 11 . For example, in the present embodiment, three vent holes 111 are provided.

[0037] Two circumferentially adjacent anchor bars 12 are located on both sides of the web of the stiffening ring 11 .

[0038] The anchor bar 12 is U-shaped and its opening is arranged toward the position where the square steel liner is located.

[0039] The spacing between the bottom of the anchor bar 12 and the pipe wall of the square steel liner is 10 cm.

[0040] The anchor bar 12 and the stiffening ring 11 are fully welded.

[0041] The height of the weld between the anchor bar 12 and the stiffening ring 11 is half the diameter of the anchor bar.

[0042] The steel mesh 13 includes a plurality of longitudinal steel bars 131 and a plurality of circumferential steel bars 132 welded to each other.

[0043] A plurality of longitudinal steel bars 131 are arranged at intervals along the circumference of the square steel liner, and a single longitudinal steel bar 131 is arranged along the extension direction of the square steel liner;

[0044] A plurality of annular steel bars 132 are arranged at intervals in the extension direction of the square steel liner, and a single annular steel bar 132 is arranged at intervals along the circumference of the square steel liner;

[0045] The top of a single anchor bar 12 is fixed to two adjacent longitudinal reinforcement bars 131 respectively.

[0046] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A square steel lining with a reinforced structure to resist external pressure, characterized in that: The square steel lining (1) is provided with a plurality of annular stiffening rings (11) at intervals along its extension direction on the circumference thereof, and a plurality of anchor bars (12) are provided on the side of the web of each annular stiffening ring (11), and the top of the anchor bar (12) is fixed to the steel mesh (13); There is a certain distance between the steel mesh (13) and the top of the stiffening ring (11); There is a certain distance between the bottom of the anchor bar (12) and the pipe wall of the square steel liner.

2. The square steel liner with an external pressure resistant reinforcement structure according to claim 1 is characterized in that: The bottom of the stiffening ring (11) is fully welded to the pipe wall of the square steel liner.

3. The square steel liner with an external pressure-resistant reinforced structure according to claim 1 is characterized in that: Two circumferentially adjacent anchor bars (12) are respectively located on both sides of the web of the stiffening ring (11).

4. The square steel lining with an external pressure resistant reinforced structure according to claim 1, 2 or 3, characterized in that: A plurality of vent holes (111) are provided on the stiffening ring (11), and at least three vent holes (111) are provided on each stiffening ring (11).

5. The square steel liner with an external pressure-resistant reinforced structure according to claim 1 is characterized in that: The anchor bar (12) is U-shaped and its opening is arranged toward the location of the square steel liner.

6. The square steel liner with a reinforced structure for resisting external pressure according to claim 1 is characterized in that: The distance between the bottom of the anchor bar (12) and the pipe wall of the square steel liner is 10 cm.

7. The square steel lining with a reinforced structure for resisting external pressure according to claim 1, 3, 5 or 6, characterized in that: The anchor bar (12) and the stiffening ring (11) are fully welded.

8. The square steel liner with a reinforced structure for resisting external pressure according to claim 7 is characterized in that: The height of the weld between the anchor bar (12) and the stiffening ring (11) is half the diameter of the anchor bar.

9. The square steel liner with a reinforced structure for resisting external pressure according to claim 1 is characterized in that: The steel mesh (13) comprises a plurality of longitudinal steel bars (131) and a plurality of circumferential steel bars (132) welded to each other. A plurality of longitudinal steel bars (131) are arranged at intervals along the circumference of the square steel liner, and a single longitudinal steel bar (131) is arranged along the extension direction of the square steel liner; A plurality of annular steel bars (132) are arranged at intervals in the extension direction of the square steel lining, and a single annular steel bar (132) is arranged at intervals along the circumference of the square steel lining; The top of a single anchor bar (12) is respectively fixed to two adjacent longitudinal steel bars (131).

10. A tailwater emergency gate, comprising a tailwater emergency gate body, characterized in that: The tailwater emergency gate body is provided with a square steel lining with an external pressure-resistant reinforcement structure as claimed in claim 1.

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