Overflow dam curve weir surface box type hydraulic slip form equipment

Abstract

The utility model provides overflow dam curve weir surface box type hydraulic slip form equipment, which belongs to the technical field of water conservancy overflow dam engineering and comprises a gate pier, a step weir body arranged in the gate pier, a truss mounted on the inner wall of the gate pier, a triangular fixing frame fixedly connected to the bottom end of the truss, a connecting square pipe fixedly connected to the inner wall of the truss, and a rail fixedly connected to the other end of the connecting square pipe. A box-shaped mold body is arranged between the rails and comprises a bottom mold, single-side rail wheels are installed on the outer wall of the bottom mold, the two single-side rail wheels are clamped on the two rails respectively, the outer wall of the bottom mold is fixedly connected with a lower connecting piece, the top of the bottom mold is fixedly connected with an upper connecting piece, and a plastering platform is hung on the outer wall of the box-shaped mold body and comprises a supporting square pipe. One end of the supporting square tube is movably connected with the lower connecting piece, and the other end is fixedly connected with the guardrail. The utility model has the advantages of flexible box body loading, easy control of weir surface linetype, good track fluency, safety and reliability, shortened construction period, no loss in the construction process and high turnover rate.

Description

Technical Field

[0001] This utility model relates to a box-type hydraulic slipform device for the curved weir surface of an overflow dam, but it does not limit this utility model. Background Technology

[0002] Under the action of high-speed water flow, the overflow dam surface may experience honeycomb pitting due to poor local flatness of the concrete surface and incomplete removal of air bubbles. The water flow may generate negative pressure at the boundary of the surface, causing cavitation erosion. This results in the peeling of material particles on the structural surface, which will have a significant impact on the safety of the dam's discharge.

[0003] Controlling the smoothness and honeycomb-like surface of the weir surface concrete requires careful consideration of the formwork type and the continuity of pouring. Currently, the three most commonly used formwork types for overflow surfaces are conventional formwork, flip-formwork, and tie-formwork. Conventional formwork relies on internal bracing and external hooping for reinforcement, making it difficult to control the formwork's anti-buoyancy capacity, hindering the removal of surface bubbles during concrete vibration, resulting in poor continuous pouring capability and difficulty in controlling the construction quality of the weir surface. Flip-formwork involves fabricating different types of formwork according to the weir surface curve, with P1015 formwork used for assembling the curved sections. This assembly process is cumbersome, leading to interruptions in concrete pouring, and the finished weir surface is prone to sharp edges and insufficient smoothness of the curve. Currently, the formwork for weir surfaces commonly uses a winch-pulling method. The pulling formwork involves constructing a frame with a steel plate welded to the bottom as the base formwork, which is then pulled upwards by a winch or chain hoist. However, the synchronicity during winch or chain hoisting is poor, the track spacing is uneven, and the formwork is prone to jamming, requiring numerous adjustments. This is detrimental to the continuity of concrete pouring, and the loaded material is prone to falling onto the finishing platform or weir surface, which is detrimental to the stability and safety of the sliding formwork and also affects the quality of the completed weir surface. Utility Model Content

[0004] To address the problems encountered during the construction of overflow weir concrete using winch-driven formwork, such as poor synchronization during winch or chain hoist traction, complex track positioning and spacing adjustments leading to formwork jamming, and the tendency for loaded materials to fall onto the finishing platform or weir surface, this invention provides a box-type hydraulic slipform device for curved weir surfaces in overflow dams. These issues result in poor stability and safety of the formwork system, numerous cold joints in the weir concrete, low flatness, uneven lines, numerous honeycomb pits, and low construction efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The system includes two gate piers, each with a stepped weir inside. Trusses are installed on the inner walls of both piers, and triangular fixing frames are fixedly connected to the bottom ends of each truss. Multiple connecting square tubes are fixedly connected to the inner walls of each truss, and rails are fixedly connected to the other ends of each connecting square tube. A box-shaped mold is positioned between the two rails. The box-shaped mold includes a bottom mold, and two single-sided track wheels are installed on the outer walls of both sides of the bottom mold. The number of single-sided track wheels on each side is two. The side track wheels are respectively locked on two tracks. The outer wall of the bottom mold is fixedly connected to a lower connector, and there are multiple lower connectors. The top of the bottom mold is fixedly connected to an upper connector, and there are multiple upper connectors. The outer wall of the box-shaped mold body is suspended by a finishing platform. The finishing platform includes a supporting square tube, and there are multiple supporting square tubes. One end of the multiple supporting square tubes is movably connected to the multiple lower connectors. The other end of the multiple supporting square tubes is fixedly connected to a guardrail. The other end of the multiple supporting square tubes is connected to the multiple upper connectors by a chain.

[0007] As a further description of the above technical solution:

[0008] The stepped weir body includes multiple steps, and the top of each step is fixedly connected to a support rod. There are multiple support rods, and each support rod is equipped with a U-shaped guide wheel at its top.

[0009] As a further description of the above technical solution:

[0010] The outer wall of the bottom mold is fixedly connected with a traction ring, and there are two traction rings. Steel wire ropes are bound inside the two traction rings. The other end of the steel wire rope passes through the end of the uppermost step and is equipped with a continuous hydraulic jack. The continuous hydraulic jack is fixed to the top of the step weir body. The two steel wire ropes pass through the top of multiple U-shaped guide wheels.

[0011] As a further description of the above technical solution:

[0012] Each of the outer walls of the bottom mold is fixedly connected with a stabilizing ring, and there are multiple stabilizing rings. The multiple stabilizing rings are located at both ends of the outer wall of the bottom mold, and are in pairs.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the bottom mold is equipped with inlet and outlet ports, and there are multiple inlet and outlet ports.

[0015] As a further description of the above technical solution:

[0016] Both trusses are arc-shaped, and perforated plates are installed in the middle of multiple supporting square tubes.

[0017] The beneficial effects of this utility model are as follows: When using this system for concrete construction of curved weir surfaces in the overflow dam section, it overcomes the problems of repeated operations such as traditional formwork and formwork assembly, reinforcement and dismantling, as well as the problem of multiple construction joints caused by the inability to pour continuously. At the same time, it overcomes the disadvantages of easy material falling off and poor weir surface flatness. It has the advantages of flexible box loading, easy control of weir surface shape, high surface structure density and good integrity, avoiding cold joints and honeycomb pitting, good track smoothness, safety and reliability, and shortening the construction period. Moreover, the system has no loss during construction, high turnover rate, and the steel can be recycled and reused after construction. Attached Figure Description

[0018] The following figures are shown to more clearly illustrate a box-type hydraulic slipform device for a spillway dam with curved weir surface;

[0019] Figure 1 This is a first-view schematic diagram of the overall structure of this utility model;

[0020] Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of the B-structure;

[0021] Figure 3 This is a schematic diagram of the box-shaped mold structure of this utility model;

[0022] Figure 4 This utility model Figure 3 Enlarged schematic diagram of structure A in the middle;

[0023] Figure 5 This is a schematic diagram of the traction ring structure of this utility model.

[0024] The labels in the attached diagram;

[0025] 1. Gate pier; 2. Stepped weir body; 3. Truss; 4. Triangular fixing frame; 5. Connecting square tube; 6. Track; 7. Support rod; 8. U-shaped guide wheel; 9. Box-shaped mold; 10. Bottom mold; 11. Traction ring; 12. Single-sided track wheel; 13. Lower connector; 14. Upper connector; 15. Finishing platform; 16. Supporting square tube; 17. Guardrail; 18. Chain; 19. Stabilizing ring; 20. Steel wire rope; 21. Continuous hydraulic jack; 22. Inlet and outlet. Detailed Implementation

[0026] Please refer to the attached document. Figures 1 to 5A box-type hydraulic slipform device for a curved weir face of an overflow dam includes two gate piers 1. Each gate pier 1 has a stepped weir body 2 inside. Trusses 3 are installed on the inner walls of both gate piers 1, and both trusses 3 are arc-shaped. Triangular fixing brackets 4 are fixedly connected to the bottom ends of both trusses 3. Multiple connecting square tubes 5 are fixedly connected to the inner walls of both trusses 3. Tracks 6 are fixedly connected to the other ends of the multiple connecting square tubes 5. A box-type mold body 9 is set between two tracks 6. The box-type mold body 9 includes a bottom mold 10. Two single-sided track wheels 12 are installed on the outer walls of both sides of the bottom mold 10. Two adjacent single-sided track wheels 12 are respectively engaged with the two tracks 6. The bottom mold 10 has multiple lower connectors 13 fixedly connected to its outer wall. The top of the bottom mold 10 has multiple upper connectors 14 fixedly connected to its top. The outer wall of the box-shaped mold 9 has a troweling platform 15 suspended from it. The troweling platform 15 includes multiple supporting square tubes 16. A hollow plate is installed in the middle of each of the multiple supporting square tubes 16. One end of each of the multiple supporting square tubes 16 is movably connected to multiple lower connectors 13. The other end of each of the multiple supporting square tubes 16 is fixedly connected to a guardrail 17. The other end of each of the multiple supporting square tubes 16 is connected to multiple upper connectors 14 by a chain 18. The angle of the troweling platform 15 is adjusted by the extension and retraction of the chain 18.

[0027] The equipment is simple and quick to install on site, with high positioning accuracy. The spacing adjustment of the track 6 is not affected by the concrete deviation of the gate pier 1, and there is no longer a requirement to install embedded parts in advance. The upper and lower triangular fixing frames 4 balance the downward force, and the anchor steel bars connect the truss 3 to resist the horizontal bending moment. This structure is not only suitable for newly built spillway dams, but also for weir surface demolition and reinforcement projects. The two rows of single-sided track wheels 12 set on the left and right sides are respectively locked on the two tracks 6. The lower row of single-sided track wheels 12 mainly resists the overturning of the box-shaped mold 9 and also assists the box-shaped mold 9 in walking. This structural design enhances the overturning resistance and stability of the box-shaped mold 9 itself, and provides a safety guarantee for the smooth walking of the box-shaped mold 9. At the same time, the filling material inside the box-shaped mold 9 is not easy to fall or spill. The loading quantity of different box-shaped molds 9 can be controlled, making it easier to resist the buoyancy of concrete and more accurately control the accuracy of the weir surface curve.

[0028] The stepped dam body 2 includes multiple steps. Support rods 7 are fixedly connected to the top of the multiple steps. There are multiple support rods 7. U-shaped guide wheels 8 are installed on the top of each support rod 7. Traction rings 11 are fixedly connected to the outer wall of the bottom mold 10. There are two traction rings 11. Steel wire ropes 20 are tied inside the two traction rings 11. The other end of the steel wire rope 20 passes through the end of the uppermost step and is equipped with a continuous hydraulic jack 21. The continuous hydraulic jack 21 is fixed to the top of the stepped dam body 2. The two steel wire ropes 20 pass through the top of the multiple U-shaped guide wheels 8.

[0029] The continuous hydraulic jack 21 is a continuous traction hydraulic jack, which is fixed to the top of the weir surface in conjunction with the steel beam. The wire rope 20 is connected to the anchor bar of the stepped weir body 2 through the U-shaped guide wheel 8, which constrains the traction force of the wire rope 20 along the center direction of the track 6, driving the box-shaped mold body 9 to move along the track 6.

[0030] Each of the outer walls of the bottom mold 10 is fixedly connected with a stabilizing ring 19, and there are multiple stabilizing rings 19. The multiple stabilizing rings 19 are located at both ends of the outer wall of the bottom mold 10, and are in pairs.

[0031] Install a chain hoist on the stabilizing ring 19, use a crane to lift the box-shaped mold 9 to the height of the track centerline, place the track 6 between the two rows of single-sided track wheels 12 on both sides of the box-shaped mold 9, adjust the balance of the box-shaped mold 9, tighten and fix the other end of the chain hoist on the truss 3 to stabilize the box-shaped mold 9, pull the traction steel wire rope 20 through the box-shaped mold 9, and fix the traction ring 11 firmly with a special buckle, then remove the crane.

[0032] The outer wall of the bottom mold 10 is equipped with inlet and outlet ports 22, and there are multiple inlet and outlet ports 22. If water is used as the loading material, it can be unloaded through the outlet port. The load control of the box mold 9 is flexible and stable.

[0033] Working principle

[0034] Mark the installation axis points and track 6 numbers on the side of truss 3. Connect truss 3 and track 6 with connecting square tubes 5 by welding. Adjust the distance between the two tracks 6. First, position and install the bottom fixed triangular bracket 4. Then, install each truss 3 step by step on the upper part of the triangular bracket 4. The trusses 3 are welded together. The lower end of truss 3 is supported by square steel. The side is connected to the embedded part of the gate pier 1. Fix the steel beam platform on the top of the stepped weir body 2. Install the continuous hydraulic jack 21 on the platform. The lower end of the wire rope 20 is connected to the box-shaped mold body 9 and the traction ring 11, and the upper end is connected to the continuous hydraulic jack 21. The middle is arranged according to the design along the U-shape. The top of the guide wheel 8 passes through, and a chain hoist is installed on the stabilizing ring 19. The box-shaped mold 9 is lifted by a crane to the height of the track centerline. The track 6 is placed between the two rows of single-sided track wheels 12 on both sides of the box-shaped mold 9. The balance of the box-shaped mold 9 is adjusted, and the other end of the chain hoist is tightened and fixed on the truss 3 to stabilize the box-shaped mold 9. The traction steel wire rope 20 is pulled through the box-shaped mold 9, and the traction ring 11 is firmly fixed with a special buckle. The crane is removed, and the box-shaped mold 9 is in place. A short-distance sliding test is conducted to confirm the basic condition of the box-shaped mold 9, the track 6, and the traction system. If adjustments are needed, they must be completed before construction to ensure the continuity and stability of construction.

[0035] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0036] It should be understood that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. This invention is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A box-type hydraulic slipform device for a spillway dam with curved weir surface, comprising a gate pier (1), characterized in that: There are two gate piers (1). The interior of each gate pier (1) is provided with a stepped weir body (2). The inner walls of each gate pier (1) are equipped with trusses (3). The bottom ends of each truss (3) are fixedly connected with triangular fixing brackets (4). The inner walls of each truss (3) are fixedly connected with connecting square tubes (5). There are multiple connecting square tubes (5). The other ends of each connecting square tube (5) are fixedly connected with rails (6). A box-shaped mold (9) is provided between the two rails (6). The box-shaped mold (9) includes a bottom mold (10). The outer walls of both sides of the bottom mold (10) are equipped with single-sided track wheels (12). There are two single-sided track wheels (12) respectively. The two adjacent single-sided track wheels (12) are respectively locked. On the two tracks (6), the outer wall of the bottom mold (10) is fixedly connected with a lower connector (13), and there are multiple lower connectors (13). The top of the bottom mold (10) is fixedly connected with an upper connector (14), and there are multiple upper connectors (14). The outer wall of the box-shaped mold (9) is suspended with a finishing platform (15). The finishing platform (15) includes a supporting square tube (16), and there are multiple supporting square tubes (16). One end of the multiple supporting square tubes (16) is movably connected to the multiple lower connectors (13). The other end of the multiple supporting square tubes (16) is fixedly connected with a guardrail (17). The other end of the multiple supporting square tubes (16) is connected to the multiple upper connectors (14) by a chain (18).

2. The overflow dam curved weir box-type hydraulic slipform equipment according to claim 1, characterized in that: The stepped weir (2) includes multiple steps, and the top of each step is fixedly connected to a support rod (7). There are multiple support rods (7), and each support rod (7) is equipped with a U-shaped guide wheel (8) on its top.

3. The overflow dam curved weir box-type hydraulic slipform equipment according to claim 2, characterized in that: The outer wall of the bottom mold (10) is fixedly connected with a traction ring (11), and there are two traction rings (11). The inside of each of the two traction rings (11) is bound with a steel wire rope (20). The other end of the steel wire rope (20) passes through the end of the uppermost step and is equipped with a continuous hydraulic jack (21). The continuous hydraulic jack (21) is fixed to the top of the step weir (2). The two steel wire ropes (20) thus pass through the top of the multiple U-shaped guide wheels (8).

4. The overflow dam curved weir box-type hydraulic slipform equipment according to claim 3, characterized in that: Each of the outer walls of the bottom mold (10) is fixedly connected with a stabilizing ring (19), and there are multiple stabilizing rings (19). The multiple stabilizing rings (19) are located at both ends of the outer wall of the bottom mold (10) and are in pairs.

5. A box-type hydraulic slipform device for a curved weir surface of an overflow dam according to claim 1, characterized in that: The outer wall of the bottom mold (10) is equipped with inlet and outlet ports (22), and there are multiple inlet and outlet ports (22).

6. The overflow dam curved weir box-type hydraulic slipform equipment according to claim 5, characterized in that: Both trusses (3) are arc-shaped, and hollow plates are installed in the middle of multiple supporting square tubes (16).

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