Slope twisted surface dam anti-seepage plate slip form device

Abstract

The utility model discloses a slope twisted surface dam anti-seepage plate slip form device which comprises a plurality of I-shaped steel guide rails which are arranged at intervals in the width direction of an anti-seepage plate, and the extending direction of the I-shaped steel guide rails is parallel to the extending direction of an X line of a toe board. Each I-shaped steel guide rail is suspended and fixed above the foundation surface of the anti-seepage plate through a plurality of anchor rods which are arranged at intervals along the extension direction of the I-shaped steel guide rail; the formwork mechanism comprises side formworks vertically arranged on the two sides of the foundation surface of the anti-seepage plate and a panel which is in lap joint with the tops of the two side formworks in a sliding mode, a reinforcing framework is welded and fixed to the upper surface of the panel, and a traction mechanism is connected to the reinforcing framework; the guide sliding mechanism comprises a plurality of sliding assemblies arranged at the top end and the bottom end of the upper surface of the reinforcing framework in groups, and the sliding assemblies are matched with the guide rails to guide the whole panel to slide in the extending direction of the guide rails.

Description

Technical Field

[0001] This utility model relates to the field of slipform construction technology, specifically to a slipform device for a dam with a tortuous slope. Background Technology

[0002] Slipform construction technology enables continuous concrete pouring by raising and lowering the slipform, and has significant advantages such as high construction efficiency, low cost, and stable molding quality. It has become the mainstream technology for the construction of large-volume concrete structures.

[0003] However, traditional slipform technology faces numerous challenges under complex terrain conditions. Taking the Lawa Hydropower Station as an example, its anti-seepage slab structure is distributed along an elevation of 2475m to 2663m, with a maximum elevation difference of 158m. The slope of the vertical toe slab "X" line (the "X" line is the intersection of the extended surface of the panel bottom and the design foundation surface of the toe slab, which is the toe slab baseline) dynamically varies between 1:1 and 1:1.5, and the slope angle of the sloping toe slab ranges from 28.3669° to 34.5923°.

[0004] For dams built on such complex terrain, the X-ray of the toe plate changes with the elevation, and the slope of the cut-off plate perpendicular to the X-ray of the toe plate also changes accordingly. This requires the slipform of the cut-off plate to be adjusted to adapt to the X-ray direction of the toe plate. However, in the actual lifting process of slipform, it is difficult to keep the two ends of the slipform of the cut-off plate on the same horizontal plane, and the formwork is prone to shifting to the downstream direction, which affects the construction quality and progress. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a sliding formwork device for seepage prevention boards of dams with sloping twisted surfaces.

[0006] A sliding formwork device for a sloping twisted surface dam with an I-beam guide rail is provided. Multiple I-beam guide rails are spaced apart along the width of the dam. The extension direction of the I-beam guide rails is parallel to the extension direction of the "X" line of the toe plate. Each I-beam guide rail is suspended and fixed above the dam foundation surface by multiple anchor rods spaced apart along its extension direction. The formwork mechanism includes side molds erected on both sides of the dam foundation surface and panels slidably overlapping the tops of the side molds. A reinforcing frame is welded and fixed to the upper surface of the panel, and a traction mechanism is connected to the reinforcing frame. The guiding sliding mechanism includes multiple sliding components grouped at the top and bottom of the upper surface of the reinforcing frame. The sliding components cooperate with the guide rails to guide the entire panel to slide along the extension direction of the guide rails.

[0007] A further technical solution is to strengthen the frame by connecting crossbeams and longitudinal beams in an alternating manner.

[0008] A further technical solution is: the sliding assembly includes a mounting plate that is vertically fixed on the reinforcing frame, the mounting plates are symmetrically arranged on both sides of the I-beam guide rail, and a first roller is horizontally mounted between the bottom of the two mounting plates, the first roller making rolling contact with the lower flange of the I-beam guide rail.

[0009] A further technical solution is as follows: Two horizontally extending connecting plates are welded at intervals on the side of the mounting plate facing the I-beam guide rail. A second roller is longitudinally mounted between the two connecting plates on the same side, and the second roller makes rolling contact with the web of the I-beam guide rail.

[0010] A further technical solution is: the traction mechanism includes multiple traction anchor rods spaced apart along the width of the impermeable board, with chain hoists fixedly connected to the traction anchor rods, and the traction cable of the chain hoists fixedly connected to the top of the reinforcing frame.

[0011] A further technical solution is to reinforce the frame by evenly placing multiple counterweight sandbags.

[0012] A further technical solution is: a vibrating platform is built on the reinforced frame, a finishing platform is connected to the bottom of the reinforced frame, and a curing shed is built on the vibrating platform and the finishing platform.

[0013] The beneficial effects of this utility model are:

[0014] This device can be used for the continuous pouring of anti-seepage concrete on both sides of the dam. It is safe, reliable, easy to install and dismantle, convenient to construct, reusable, low in cost, and environmentally friendly.

[0015] This slipform device uses side molds and diagonal braces of square timber on both sides of the foundation surface of the geomembrane as support tracks for the panel sliding. The thickness and slope of the geomembrane are controlled by the side molds. Multiple sliding components of the guide sliding mechanism cooperate with the guide rail, so that the first roller and the second roller roll and slide closely against the lower flange and web of the I-beam guide rail, respectively, thereby achieving parallel positioning of the panel and ensuring that it always slides along the extension direction of the guide rail, preventing the panel from shifting position when lifted. Attached Figure Description

[0016] Figure 1 This is a top view of the slipform device for the seepage-proof board.

[0017] Figure 2 This is the front view of the slipform device for the seepage-proof board.

[0018] Figure 3 This is a schematic diagram of the sliding component;

[0019] Figure 4 yes Figure 3 Side view of the sliding component;

[0020] In the picture:

[0021] 1. I-beam guide rail; 2. Anchor bolt installation; 3. Side formwork; 4. Panel; 5. Reinforcing frame; 6. Traction mechanism; 61. Traction anchor bolt; 62. Chain hoist; 7. Sliding assembly; 71. Installation plate; 72. First roller; 73. Connecting plate; 74. Second roller; 8. Inserted reinforcing bar; 9. Square timber diagonal brace; 10. Anti-seepage board foundation surface; 11. Anti-seepage board with concrete already applied; 12. Finishing platform. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 this utility model and simplifying the description, and 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 on the utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] A slipform device for seepage prevention boards of a sloping twisted surface dam, such as Figures 1-4 As shown, it includes an I-beam guide rail 1, a template mechanism, and a guide sliding mechanism.

[0026] Multiple I-beam guide rails 1 are spaced apart along the width of the impermeable slab. The extension direction of the I-beam guide rails 1 is parallel to the extension direction of the "X" line of the toe plate. Each I-beam guide rail 1 is suspended and fixed above the impermeable slab foundation surface 10 by multiple installation anchor rods 2 arranged at intervals along its extension direction. Specifically, the I-beam guide rails 1 are made of I14 I-beams, and at least three I-beam guide rails 1 are provided.

[0027] The formwork mechanism includes side formwork 3 erected on both sides of the impermeable slab foundation surface 10, and panel 4 slidably overlapping the top of the side formwork 3. A reinforcing frame 5 is welded and fixed to the upper surface of the panel 4, and a traction mechanism 6 for lifting the sliding formwork device is connected to the reinforcing frame 5. Specifically, the panel 4 uses 6mm thick steel formwork, and the side formwork 3 uses wooden formwork. The panel 4 extends 0.4m beyond the side formwork 3 on both sides along its length.

[0028] The side formwork 3 is erected on the foundation surface 10 of the anti-seepage slab using square timber diagonal braces 9. The square timber diagonal braces 9 are fixed to the foundation surface 10 of the anti-seepage slab using reinforcing bars 8 anchored 1m into the rock mass. The side formwork 3 and the square timber diagonal braces 9 are fixed together with iron nails. Before concrete construction, the side formwork 3 and the square timber diagonal braces 9 are erected in advance to prepare the formwork and control the thickness and slope of the anti-seepage slab.

[0029] The guide sliding mechanism includes multiple sliding components 7 arranged in groups at the top and bottom of the upper surface of the reinforcing frame 5. The sliding components 7 cooperate with the I-beam guide rail 1, and the guide panel 4 slides along the extension direction of the I-beam guide rail 1 as a whole.

[0030] The reinforcing frame 5 is composed of interlaced horizontal and vertical beams. Specifically, the horizontal and vertical beams are made of I20a I-beams. The reinforcing frame 5 enhances the strength of the panel 4.

[0031] The sliding assembly 7 includes a mounting plate 71 that is vertically fixed on the reinforcing frame 5. The mounting plates 71 are symmetrically arranged on both sides of the I-beam guide rail 1. A first roller 72 is horizontally mounted between the bottoms of the two mounting plates 71. The two ends of the first roller 72 are rotatably connected to the two mounting plates 71. The first roller 72 is in rolling contact with the lower flange of the I-beam guide rail 1.

[0032] Two horizontally extending connecting plates 73 are welded at intervals on the side of the mounting plate 71 facing the I-beam guide rail 1. A second roller 74 is longitudinally mounted between the two connecting plates 73 on the same side. The two ends of the second roller 74 are rotatably connected to the two connecting plates 73. The second roller 74 makes rolling contact with the web of the I-beam guide rail 1.

[0033] When the traction mechanism 6 lifts the panel 4 upwards, the first roller 72 and the second roller 74 roll against the lower flange and web of the I-beam guide rail 1, respectively, to achieve parallel positioning of the panel 4. Both the first roller 72 and the second roller 74 are cylindrical structures.

[0034] The traction mechanism 6 includes multiple traction anchor rods 61 spaced apart along the width of the impermeable plate. Chain hoists 62 are fixedly connected to the traction anchor rods 61, and the traction cables of the chain hoists 62 are fixedly connected to the top of the reinforcing frame 5. More preferably, the traction mechanism 6 further includes traction anchor rods 61 anchored to the foundation surface 10 of the impermeable plate, with chain hoists 62 fixedly connected to the traction anchor rods 61. The traction cables of the chain hoists 62 are fixedly connected to the top of the panel 4, further strengthening the fixation and preventing the slipform device from falling.

[0035] A mounting frame is installed on the reinforced frame 5, and multiple counterweight sandbags are evenly placed on the mounting frame. By placing counterweight sandbags on the panel 4, the upward pressure on the panel 4 during concrete pouring can be reduced, thereby enhancing the overall buoyancy resistance and rigidity of the device.

[0036] A vibration platform is built on the reinforcing frame 5, and a finishing platform 12 is connected to the rear end of the reinforcing frame 5. Curing sheds for rain and wind protection are erected on both the vibration platform and the finishing platform 12. The construction of the vibration platform and the finishing platform 12 fulfills the functions of vibration and finishing after concrete pouring. Specifically, the vibration platform and the finishing platform 12 are constructed from steel pipes welded into a triangular frame structure, with bamboo planks fully laid on the top surface of the triangular frame. Guardrails are installed on the vibration platform and the finishing platform 12, and a curing shed is built on the guardrails. A 15kW warm air blower and dry powder fire extinguishers are installed inside the curing shed. The finishing platform 12 is connected to the reinforcing frame 5 using angle steel. To enhance stability and prevent falls, anti-fall steel wire ropes are installed between the finishing platform 12 and the reinforcing frame 5. Multiple rubber rollers are spaced apart at the bottom of the finishing platform 12 as sliding supports, allowing it to slide on the pre-constructed concrete 11 of the impermeable slab as the panel slides.

[0037] How to use this utility model:

[0038] (1) Process and test-assemble each component in the processing plant, and disassemble and transport it to the site after meeting the requirements;

[0039] (2) Install the side formwork 3, square timber bracing 9 and I-beam guide rail 1 according to the engineering design drawings, and then correct and fix them;

[0040] (3) Install traction mechanism 6;

[0041] (4) Install panel 4, reinforcing frame 5, and vibrating platform according to the engineering design drawings. Install counterweight sandbags evenly on the mounting frame of panel 4 according to the counterweight requirements of the template design. Then install auxiliary structures such as the finishing platform 12 and curing shed. Simultaneously with the installation of the above structures, connect and secure the traction mechanism 6 to the reinforcing frame 5.

[0042] (5) After installation and comprehensive inspection, start the traction system for trial operation. During construction, control the lifting to 30cm each time. When the lifting reaches the installation anchor rod 2 of the I-beam guide rail 1, cut off the excess part of the installation anchor rod 2. Then the panel 4 can be lifted to achieve cyclic construction.

[0043] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A slipform device for seepage prevention board of a dam with a sloping twisted surface, characterized in that, include: Multiple I-beam guide rails are spaced apart along the width of the anti-seepage board. The extension direction of the I-beam guide rails is parallel to the extension direction of the "X" line of the toe plate. Each I-beam guide rail is suspended and fixed above the foundation surface of the anti-seepage board by multiple anchor rods arranged at intervals along its extension direction. The template mechanism includes side molds erected on both sides of the foundation surface of the impermeable board and panels that can be slidably overlapped on the top of the side molds. A reinforcing frame is welded and fixed to the upper surface of the panel, and a traction mechanism is connected to the reinforcing frame. The guide sliding mechanism includes multiple sliding components grouped at the top and bottom of the upper surface of the reinforcing frame. The sliding components cooperate with the guide rail, and the guide panel slides along the extension direction of the guide rail.

2. The slipform device for seepage prevention board of a sloping twisted surface dam according to claim 1, characterized in that, The reinforced frame is composed of crossbeams and longitudinal beams connected in an alternating manner.

3. The slipform device for seepage prevention board of a sloping twisted surface dam according to claim 1, characterized in that, The sliding assembly includes a mounting plate that is vertically fixed on a reinforcing frame. The mounting plates are symmetrically arranged on both sides of the I-beam guide rail. A first roller is horizontally mounted between the bottoms of the two mounting plates. The first roller makes rolling contact with the lower flange of the I-beam guide rail.

4. The slipform device for seepage prevention board of a sloping twisted surface dam according to claim 3, characterized in that, Two horizontally extending connecting plates are welded at intervals on the side of the mounting plate facing the I-beam guide rail. A second roller is longitudinally mounted between the two connecting plates on the same side, and the second roller makes rolling contact with the web of the I-beam guide rail.

5. The slipform device for seepage prevention board of a sloping twisted surface dam according to claim 1, characterized in that, The traction mechanism includes multiple traction anchors spaced apart along the width of the impermeable board. Chain hoists are fixedly connected to the traction anchors, and the traction cables of the chain hoists are fixedly connected to the top of the reinforcing frame.

6. The slipform device for seepage prevention board of a sloping twisted surface dam according to claim 1, characterized in that, Multiple counterweight sandbags are evenly placed on the reinforced frame.

7. A slipform device for a dam with a tortuous slope as described in claim 1, characterized in that, A vibratory platform is built on the reinforced frame, and a finishing platform is connected to the bottom of the reinforced frame. A curing shed is built on the vibratory platform and the finishing platform.

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