A horizontal joint connection structure adapted to the extrusion deformation of thin panels

Abstract

The present invention provides a horizontal joint connection structure adapted to the extrusion deformation of thin panels, comprising a concrete panel, a steel casing, reinforcing bars, a joint filling material, a copper waterstop, a surface waterstop structure, asphalt hemp yarn and a horizontal joint; the concrete panel is inclined, a horizontal joint is provided transversely between two adjacent concrete panels, the reinforcing bars pass through the horizontal joint to connect the two adjacent concrete panels, and the joint filling material is provided in the horizontal joint; steel casings are provided on both sides of the horizontal joint, the steel casings are located inside the concrete panel, the reinforcing bars are located inside the steel casings, and the inside of the steel casings is filled with asphalt hemp yarn; a surface waterstop structure is provided on the water-facing surface of the horizontal joint, and the copper waterstop is arranged at the bottom of the horizontal joint. The present invention can significantly reduce the possibility of damage near the horizontal joint due to the extrusion of the thin panel while meeting the anti-seepage requirements, and ensure the safe operation of the concrete panel in a high concrete face rockfill dam.

Description

Technical Field

[0001] The present invention relates to the technical field of dam engineering in water conservancy science, and particularly relates to a horizontal joint connection structure adapted to the extrusion deformation of a thin concrete slab. Background Art

[0002] With the implementation of the hydropower strategy, in the southwestern and northwestern regions rich in water energy resources, a large number of high dams have been built, are under construction or are to be built. An earth-rock dam is one of the most common dam types in current dam construction and also the fastest-developing dam type, mainly including homogeneous earth dams, core-wall dams, concrete face rockfill dams, etc.

[0003] A concrete face rockfill dam is a dam type with a rockfill dam body as the supporting structure and a thin layer of concrete slab provided on its upstream surface as the anti-seepage structure. In recent years, the technology of concrete face rockfill dams has developed rapidly. Currently, the dam construction level of concrete face rockfill dams has reached 200 m (the maximum dam height of Shuibuya is 233 m), and several face dams in the 250 m - 300 m class are under design and research. However, the concrete slab of a high concrete face dam is relatively long and cannot be cast in one go, and horizontal joints often need to be set. Under the action of high water head, large displacements will occur at the horizontal joints, and the large displacements will cause the steel bars near the horizontal joints to bend and deform. Since the concrete slab is bonded to the steel bars, this will cause the concrete slab protective layer near the horizontal joints to crack and spall, thus damaging the concrete slab. Summary of the Invention

[0004] In order to overcome the problem that the thin concrete slab near the existing horizontal joints is severely damaged and the steel bars bend and deform, the present invention provides a horizontal joint connection structure adapted to the extrusion deformation of a thin concrete slab. The present invention sets steel sleeves at the horizontal joints and fills asphalt hemp ropes in the steel sleeves, so that the steel bars near the horizontal joints are separated from the concrete and can move relative to each other. A rubber cushion plate is arranged at the bottom of the horizontal joint, and a water-stop copper sheet is arranged on the rubber cushion plate. The upstream water-facing surface of the concrete slab is sealed with a surface water-stop structure. The present invention can significantly reduce the possibility of damage caused by the extrusion of the concrete slab near the horizontal joints while meeting the anti-seepage requirements, and ensure the safe operation of the concrete slab in a high concrete face rockfill dam.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A horizontal joint connection structure adapted to the extrusion deformation of thin panels, comprising a concrete panel, a steel casing, steel bars, a caulking material, a copper waterstop sheet, a surface waterstop structure, asphalt hemp rope and a horizontal joint; the concrete panel is inclined, a horizontal joint is provided transversely between two adjacent concrete panels, the steel bars pass through the horizontal joint to connect the two adjacent concrete panels, and a caulking material is provided in the horizontal joint; steel casings are provided on both sides of the horizontal joint, the steel casings are located inside the concrete panel, the steel bars are located inside the steel casings, and the inside of the steel casings is filled with asphalt hemp rope; a surface waterstop structure is provided on the water-facing side of the horizontal joint, and the copper waterstop sheet is provided at the bottom of the horizontal joint.

[0007] The maximum number of the steel bars is two.

[0008] The length of the steel casing is 1 m.

[0009] The thickness range value of the concrete panel is: 30 cm - 100 cm.

[0010] A backing plate is provided at the bottom of the concrete panel, the backing plate is located at the horizontal joint and is located below the copper waterstop sheet.

[0011] The backing plate is a rubber backing plate.

[0012] The diameter of the steel casing is 1.1 times that of the steel bar.

[0013] The width of the horizontal joint is 1 - 2 cm.

[0014] The thickness of the copper waterstop sheet is 1.2 mm.

[0015] The caulking material adopts a composite asphalt filler.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention adopts a surface waterstop structure on the water-facing side of the concrete panel, a copper waterstop is provided at the bottom of the concrete panel and a rubber backing plate is provided under the copper waterstop sheet, meeting the anti-seepage requirements and ensuring the safe operation of the high concrete face rockfill dam.

[0018] In the present invention, the steel casing is sleeved on the steel bars near the horizontal joint and the inside of the casing is filled with asphalt hemp rope, separating the steel bars near the horizontal joint from the concrete panel. When the panel is displaced under water pressure, the steel bars near the horizontal joint can have a certain movement space and a barrier is formed outside the steel bars, avoiding the panel damage caused by the protrusion of the steel bars.

[0019] The present invention uses a composite asphalt filler for caulking, which can absorb the designed displacement value, reduce the displacement of the horizontal joint under high water head, and reduce the deformation degree of the steel bars.

[0020] The following will be further described in conjunction with the accompanying drawings. Description of the Drawings

[0021] Figure 1 is a schematic structural view of the present invention.

[0022] Figure 2 is a schematic view when the present invention is used for the horizontal joint structure of the panel.

[0023] In the figure: 1, concrete panel; 2, steel casing; 3, steel bar; 4, caulking material; 5, copper waterstop; 6, backing plate; 7, surface waterstop structure; 8, asphalt hemp rope; 9, horizontal joint. Detailed Embodiment

[0024] Embodiment 1:

[0025] In order to overcome the problems of serious damage to the thin panel near the existing horizontal joint and bending deformation of the steel bars, the present invention provides a horizontal joint connection structure adapted to the extrusion deformation of the thin panel as shown in Figure 1 and 2 The present invention sets a steel casing at the horizontal joint, fills asphalt hemp rope in the steel casing, so that the steel bars near the horizontal joint are separated from the concrete and can move relatively, and a rubber backing plate is set at the bottom of the horizontal joint, and a copper waterstop is set on the rubber backing plate, and the surface waterstop structure is used to seal the water-facing surface of the panel. The present invention can significantly reduce the possibility of damage caused by panel extrusion near the horizontal joint while meeting the anti-seepage requirements, and ensure the safe operation of the concrete panel in the high concrete face rockfill dam.

[0026] A horizontal joint connection structure adapted to the extrusion deformation of the thin panel, including a concrete panel 1, a steel casing 2, a steel bar 3, a caulking material 4, a copper waterstop 5, a surface waterstop structure 7, an asphalt hemp rope 8 and a horizontal joint 9; the concrete panel 1 is inclined, a horizontal joint 9 is provided transversely between two adjacent concrete panels 1, the steel bar 3 passes through the horizontal joint 9 to connect the two adjacent concrete panels 1, and the caulking material 4 is provided in the horizontal joint 9; steel casings 2 are provided on both sides of the horizontal joint 9, the steel casings 2 are located in the concrete panel 1, the steel bar 3 is located in the steel casing 2, and the inside of the steel casing 2 is filled with asphalt hemp rope 8; a surface waterstop structure 7 is provided on the water-facing surface of the horizontal joint 9, and the copper waterstop 5 is provided at the bottom of the horizontal joint 9.

[0027] The present invention adopts a surface waterstop structure 7 on the water-facing surface of the concrete panel 1 and sets a copper waterstop 5 at the bottom of the concrete panel 1, which meets the anti-seepage requirements and ensures the safe operation of the high concrete face rockfill dam.

[0028] In the present invention, a surface water-stop structure 7 is adopted on the water-facing surface of the concrete panel 1, which can play a role in preventing seepage. The form of the surface water-stop structure 7 is as follows: a rubber rod is arranged at the joint opening, a rubber corrugated water-stop belt is arranged on the rubber rod, the gap between the two is filled with a flexible material, a flexible material is laid on the corrugated water-stop belt, the surface is sealed with a reinforced rubber belt, a metal protective cover is adopted outside, fly ash is filled in the protective cover, the protective cover is fixed with galvanized expansion bolts, and the edge is sealed with a sealing agent.

[0029] In the present invention, a steel casing 2 is sleeved on the steel bar 3 near the horizontal joint 9 and asphalt hemp yarn 8 is filled in the steel casing 2, so that the steel bar 3 near the horizontal joint 9 is separated from the concrete panel 1. When the concrete panel 1 is displaced under the action of water pressure, the steel bar 3 near the horizontal joint 9 can have a certain space for movement and a barrier is formed outside the steel bar 3, avoiding the panel damage caused by the protrusion of the steel bar 3.

[0030] The present invention uses an asphalt filler to fill the horizontal joint 9. The asphalt filler can absorb the designed displacement value, reduce the displacement of the horizontal joint under the action of high water head, and reduce the deformation degree of the steel bar.

[0031] Embodiment 2:

[0032] Based on Embodiment 1, in this embodiment, the maximum number of the steel bars 3 is two.

[0033] The length of the steel casing 2 is 1 m.

[0034] The thickness range value of the concrete panel 1 is: 30 cm - 100 cm.

[0035] A backing plate 6 is arranged at the bottom of the concrete panel 1. The backing plate 6 is located at the horizontal joint 9 and is below the water-stop copper sheet 5.

[0036] The backing plate 6 is a rubber backing plate.

[0037] The diameter of the steel casing 2 is 1.1 times that of the steel bar 3. The diameter of the steel casing 2 is larger than that of the steel bar 3 to ensure that the steel bar 3 can move in the steel casing 2.

[0038] The width of the horizontal joint 9 is 1 - 2 cm.

[0039] The thickness of the water-stop copper sheet 5 is 1.2 mm.

[0040] The joint-filling material 4 adopts a composite asphalt filler.

[0041] In the present invention, a horizontal joint 9 is arranged between two adjacent concrete panels 1, and a joint-filling material 4 is filled in the horizontal joint 9. The filling of the joint-filling material 4 reduces the displacement of the horizontal joint 9 under the action of high water head and reduces the deformation degree of the steel bar 3.

[0042] In the present invention, the caulking material 4 adopts a composite asphalt filler. The composite asphalt filler can prevent seepage and meet the requirement of absorbing the designed displacement value, reducing the displacement of the horizontal joint 9 under the action of high water head and reducing the deformation degree of the steel bars 3. In the present invention, a copper water stop sheet 5 is arranged at the bottom of the concrete slab 1, and a rubber backing plate 6 is arranged under the copper water stop sheet 5.

[0043] In the present invention, a surface water stop structure 7 is adopted on the water-facing side of the concrete slab 1. A copper water stop sheet 5 is arranged at the bottom of the concrete slab 1 and a rubber backing plate 6 is arranged under the copper water stop sheet 5, meeting the seepage prevention requirement and ensuring the safe operation of the high concrete face rockfill dam.

[0044] In the present invention, a steel casing 2 is sleeved on the steel bars 3 near the horizontal joint 9 and asphalt hemp yarn 8 is filled in the steel casing 2, separating the steel bars 3 near the horizontal joint 9 from the concrete slab 1. When the concrete slab 1 is displaced under the action of water pressure, the steel bars 3 near the horizontal joint 9 can have a certain space for movement and a barrier is formed outside the steel bars 3, avoiding the panel damage caused by the protrusion of the steel bars 3. The present invention uses a composite asphalt filler to caulk the horizontal joint 9. The composite asphalt filler can absorb the designed displacement value, reducing the displacement of the horizontal joint 9 under the action of high water head and reducing the deformation degree of the steel bars.

[0045] The above examples are only illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design identical or similar to the present invention falls within the protection scope of the present invention. The devices and their structural components not described in detail in this embodiment are well-known technologies and common methods in this industry and will not be described one by one here.

Claims

1. A horizontal joint connection structure adapted to the extrusion deformation of thin panels, characterized in that: It includes a concrete panel (1), a steel casing (2), steel bars (3), a caulking material (4), a copper waterstop sheet (5), a surface waterstop structure (7), asphalt hemp yarn (8) and a horizontal joint (9); the concrete panel (1) is inclined, a horizontal joint (9) is provided transversely between two adjacent concrete panels (1), the steel bars (3) pass through the horizontal joint (9) to connect the two adjacent concrete panels (1), and the caulking material (4) is provided in the horizontal joint (9); steel casings (2) are provided on both sides of the horizontal joint (9), the steel casings (2) are located inside the concrete panel (1), the steel bars (3) are located inside the steel casings (2), and the inside of the steel casings (2) is filled with asphalt hemp yarn (8); a surface waterstop structure (7) is provided on the water-facing surface of the horizontal joint (9), and the copper waterstop sheet (5) is provided at the bottom of the horizontal joint (9); the thickness range of the concrete panel (1) is: 30 cm - 100 cm; a backing plate (6) is provided at the bottom of the concrete panel (1), the backing plate (6) is located at the horizontal joint (9), and the backing plate (6) is located below the copper waterstop sheet (5); the caulking material (4) is filled with a composite asphalt filler; the diameter of the steel casing (2) is 1.1 times that of the steel bar (3).

2. The horizontal joint connection structure adapted to the extrusion deformation of the thin panel according to claim 1, characterized in that: The maximum number of the steel bars (3) is two.

3. The horizontal joint connection structure adapted to the extrusion deformation of thin panels according to claim 1, characterized in that: The length of the steel casing (2) is 1 m.

4. A horizontal joint connection structure adapted to the extrusion deformation of a thin panel according to claim 1, characterized in that: The backing plate (6) is a rubber backing plate.

5. The horizontal joint connection structure adapted to the extrusion deformation of a thin panel according to claim 1, characterized in that: The width of the horizontal joint (9) is 1 - 2 cm.

6. The horizontal joint connection structure adapted to the extrusion deformation of thin panels according to claim 1, characterized in that: The thickness of the copper waterstop sheet (5) is 1.2 mm.

7. A horizontal joint connection structure adapted to the extrusion deformation of a thin panel according to claim 1, characterized in that: The form of the surface waterstop structure (7) is: a rubber rod is provided at the joint opening, a rubber corrugated waterstop belt is provided on the rubber rod, the gap between the two is filled with a flexible material, a flexible material is laid on the corrugated waterstop belt, the surface is sealed with a reinforced rubber belt, a metal protective cover is used outside, fly ash is filled in the protective cover, the protective cover is fixed with galvanized expansion bolts, and the edge is sealed with a sealing agent.

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