Spillway nose curve surface and overflow weir folding pouring slipform structure

Abstract

This utility model discloses a slipform structure for folded casting of a spillway nose sill curved surface and an overflow weir, belonging to the field of water conservancy engineering construction technology. This utility model, by setting multiple rotatably connected slipform units, can meet the casting requirements of complex curved surfaces in spillways. The use of triangular structures and crossbars prevents concrete from compressing and deforming the slipform. The rotatable connection at the slipform of adjacent slipform units is achieved through the cooperation of a first pin hole and a pin; the connection above adjacent slipform units is achieved through connecting parts. The rotatable connection in both upper and lower directions ensures that the slipform units can rotate stably according to the curved surface and can be stably fixed after rotation. The connecting parts, through the cooperation of two screws with opposite threads and a turnbuckle, achieve length extension and retraction to accommodate the relative rotation between adjacent slipform units; that is, the relative rotation of adjacent slipform units is achieved by operating the turnbuckle. The slipform structure of this utility model has good versatility and can adapt to different curved surfaces.

Description

Technical Field

[0001] This utility model belongs to the field of water conservancy engineering construction technology, specifically relating to a spillway nose sill curved surface and a folded casting slipform structure for overflow weir. Background Technology

[0002] Spillways are crucial flood control facilities in water conservancy projects such as reservoirs and sluices. They are typically located on one side of the dam and resemble a large trough. When the reservoir water level rises rapidly due to natural factors such as heavy rain or snowmelt, exceeding the safe storage height, the excess water is discharged orderly into the downstream river channel through the spillway. This effectively prevents damage to the dam due to excessive water pressure and ensures the safe and stable operation of the water conservancy project. The spillway's structural design is intricate and complex, generally consisting of key components such as the intake channel section, weir and sluice gate section, spillway section, and sluice gate section.

[0003] During the construction of the spillway, workers erect formwork according to design requirements, pour concrete into the formwork, and then remove the formwork after vibration, curing, and other processes once the concrete has solidified. However, the existing formwork presents numerous problems for the complex curved structure of the spillway nose section. On the one hand, custom-made steel formwork is complex to manufacture, time-consuming, and costly, and its turnover is difficult, significantly impacting the construction schedule. On the other hand, conventional formwork is insufficient to meet the requirements of complex shapes, and wooden formwork is difficult to bend and reinforce. Furthermore, due to its fixing method and structural characteristics, the existing formwork is prone to quality defects such as honeycomb and pitting during concrete pouring.

[0004] In summary, existing technologies suffer from high construction costs and low quality in curved surface casting. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a folded casting slipform structure for the spillway nose sill curved surface and the overflow weir, which is novel and reasonable in design, simple in structure, highly adaptable and easy to promote and use.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A folded casting slipform structure for the nose sill of a spillway and the overflow weir includes multiple slipform units and connectors;

[0008] The slipform unit includes a slipform plate and crossbars. Structural steel is connected to the four corners of the slipform plate. The tops of two structural steels on the same side are fixedly connected to each other, forming two triangular structures with the slipform plate. The tops of the triangular structures are fixedly connected by crossbars.

[0009] The sliding plate contact side of adjacent sliding plate units is provided with a first pin hole, and the pin passes through the first pin hole of two adjacent sliding plate units to realize the rotational connection of adjacent sliding plate units;

[0010] The top of the triangular structure has a second pin hole along the direction of the horizontal bar.

[0011] The connector includes two lead screws and a basket for connecting the two lead screws. The two lead screws have opposite thread directions, and the basket has internal threads that match the threads of the lead screws. The ends of the two lead screws away from the basket are integrally formed with connecting end plates. The connecting end plates have a third pin hole. The pin passes through the third pin hole and the second pin hole to realize the rotatable connection between the lead screw and the triangular structure.

[0012] Furthermore, an operating platform is provided on the front-end sliding formwork unit, and the operating platform is fixedly connected to the steel profile. A steel pipe guardrail is provided on the operating platform.

[0013] Furthermore, a vibration platform is provided on the rear slipform unit, the vibration platform is fixedly connected to the slipform, and a steel pipe railing is provided on the vibration platform.

[0014] Furthermore, a counterweight water tank is installed on the sliding plate.

[0015] Furthermore, the nominal diameter of the lead screw thread is 24 mm.

[0016] Furthermore, the length of the sliding template is 40cm.

[0017] This utility model has the following advantages compared with the prior art:

[0018] This invention, by setting up multiple rotatably connected slipform units, can meet the pouring requirements of complex curved surfaces in spillways. The use of triangular structures and crossbars prevents deformation of the slipform formwork due to concrete compression. Rotational connection at the slipform formwork of adjacent units is achieved through the engagement of a first pin hole and a pin; the connection above adjacent slipform units is achieved through a connector. This rotational connection in both vertical and horizontal directions ensures that the slipform units can rotate stably according to the curved surface and are stably fixed after rotation. The connector, through the engagement of two screws with opposite threads and a turnbuckle, allows for length extension and retraction to accommodate relative rotation between adjacent slipform units; that is, relative rotation between adjacent slipform units is achieved by operating the turnbuckle. Compared to existing customized curved slipforms, the slipform structure of this invention has good versatility, can adapt to different curved surfaces, thereby reducing costs, saving customization time, and improving construction efficiency. At the same time, the stable slipform structure also improves the quality of curved surface pouring.

[0019] 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

[0020] Figure 1This is a schematic diagram of an embodiment of the spillway nose sill curved surface and the overflow weir folding casting slipform structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the installed structure of the spillway nose sill curved surface and the overflow weir folding casting slipform structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the connecting parts of the embodiment of the spillway nose sill curved surface and the overflow weir folding casting slipform structure of the present invention.

[0023] Figure 4 This is a three-dimensional structural diagram of the slipform unit of the embodiment of the spillway nose sill curved surface and the overflow weir folding casting slipform structure of this utility model;

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Slipform unit; 11. Slipform plate; 12. Crossbar; 13. Structural steel; 14. First pin hole; 15. Second pin hole;

[0026] 2. Connecting parts; 21. Lead screw; 22. Flower basket;

[0027] 3. Operating platform; 4. Steel pipe guardrail; 5. Vibration platform; 6. Steel pipe railing; 7. Counterweight water tank; 8. Drive system. Detailed Implementation

[0028] Example of a slipform structure for folded casting of spillway nose sill curved surface and overflow weir:

[0029] like Figures 1-4 As shown, the folded casting slipform structure of the spillway nose sill curved surface and the overflow weir includes multiple slipform units 1 and connecting parts 2.

[0030] like Figure 4 As shown, in order to ensure the structural stability of the sliding formwork unit 1, the sliding formwork unit 1 includes a sliding formwork 11 and a crossbar 12. Structural steel 13 is connected to the four corners of the sliding formwork 11. The top ends of two structural steel 13 on the same side are fixedly connected to each other, forming two triangular structures with the sliding formwork 11. The top ends of the triangular structures are fixedly connected by the crossbar 12. Figure 4 The details of the sliding mode unit were omitted mainly to make the relative positions of the crossbar 12 and the triangular structure clear.

[0031] In order to achieve the rotational connection of adjacent sliding formwork units 1, the contact side of the sliding formwork plate 11 of adjacent sliding formwork units 1 is provided with a first pin hole 14. The pin passes through the first pin hole 14 of the two adjacent sliding formwork units 1 to achieve the rotational connection of adjacent sliding formwork units 1.

[0032] In order to achieve rotation control of adjacent sliding mode units 1, a second pin hole 15 is provided at the top of the triangular structure along the direction of the crossbar 12.

[0033] like Figure 3 As shown, Figure 1 and Figure 2 The connector 2 in the diagram is a simplified illustration, so it is similar to... Figure 3 The structure differs slightly. To achieve the connection at the top of adjacent sliding mold units 1, the connector 2 includes two lead screws 21 and a basket 22 for connecting the two lead screws 21. The threads of the two lead screws 21 are in opposite directions, and the basket 22 has internal threads that match the threads of the lead screws 21. Specifically, when the basket 22 rotates, due to the interaction between its internal threads and the threads of the two lead screws 21, it simultaneously pushes or pulls back the two lead screws 21, thereby achieving the extension and retraction of the length of the connector 2. The left-hand threaded lead screw 21 moves to the left when the basket 22 rotates clockwise and to the right when it rotates counterclockwise. The right-hand threaded lead screw 21 moves to the right when the basket 22 rotates clockwise and to the left when it rotates counterclockwise. When the basket 22 rotates, the two lead screws 21 move in opposite directions simultaneously, thereby changing the overall length of the connector 2. Secondly, each of the two lead screws 21 has an integrally formed connecting end plate at the end furthest from the flower basket 22. A third pin hole is provided on the connecting end plate, through which a pin passes to the third pin hole and the second pin hole 15, enabling the lead screw 21 to rotate relative to the triangular structure. This allows the connecting member 2 to rotate relative to the crossbar 12, ensuring the extension and retraction of the connecting member 2's length and driving the two adjacent sliding mold units 1 to rotate relative to each other. The flower basket 22 can be square or circular, as long as it fulfills the corresponding function.

[0034] To facilitate operation and construction, an operating platform 3 is installed on the front-end slipform unit 1, and the operating platform 3 is fixedly connected to the steel section 13. To ensure the safe operation of the equipment, a steel pipe guardrail 4 is installed on the operating platform 3.

[0035] To facilitate the smoothing and vibration work, a vibration platform 5 is provided on the rear sliding formwork unit 1. The vibration platform 5 is fixedly connected to the sliding formwork 11, and a steel pipe railing 6 is provided on the vibration platform 5.

[0036] To prevent the slipform unit 1 from being squeezed and misaligned by the concrete, a counterweight water tank 7 is installed on the slipform 11.

[0037] To ensure connection strength, the nominal diameter of the thread of the lead screw 21 is 24mm.

[0038] To accommodate more complex surface variations, the length of the sliding template 11 is preferably 40cm.

[0039] In use, this utility model firstly connects the slipform structure to the spillway via a slide rail structure, and is pulled along the slide rail by a drive system 8. This drive system 8 employs a mechanical transmission method. The mechanical transmission includes components such as a lead screw, guide rail, and pulleys, used to precisely control the movement direction and position of the slipform structure. All components of the slipform structure are made of high-strength, corrosion-resistant steel. The surface of the slipform structure in contact with the concrete is processed with high precision to make it smooth and flat, reducing friction during concrete pouring and ensuring the flatness and smoothness of the concrete surface. During implementation, a support system is also provided to adjust the position of the slipform structure.

[0040] Secondly, before construction, the slipform structure is assembled on-site and hoisted to the installation position using its equipment. The drive system 8 slowly moves the slipform structure along the guide rails to the initial pouring position, and the curvature of the slipform structure is adjusted by rotating the basket 22 according to the pouring surface. During pouring, construction follows the principle of bottom-up, layered pouring. The thickness of each layer of concrete is controlled between 30-50 cm to ensure sufficient vibration and compaction. During concrete pouring, once a layer of concrete is poured and compacted, the drive system 8 is activated to pull the slipform structure to the next pouring position. After construction is completed, all components are cleaned, maintained, and stored separately, and the concrete is cured.

[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 folded casting slipform structure for the curved surface of a spillway nose sill and the overflow weir, characterized in that: It includes multiple sliding mode units (1) and connectors (2); The sliding formwork unit (1) includes a sliding formwork (11) and a crossbar (12). Structural steel (13) is connected to the four corners of the sliding formwork (11). The top ends of two structural steel (13) on the same side are fixedly connected to each other, forming two triangular structures with the sliding formwork (11). The top ends of the triangular structures are fixedly connected by the crossbar (12). The sliding plate (11) of adjacent sliding mold units (1) are provided with first pin holes (14) on the contact side. The pins pass through the first pin holes (14) of the two adjacent sliding mold units (1) to realize the rotational connection of the adjacent sliding mold units (1). The top of the triangular structure is provided with a second pin hole (15) along the direction of the crossbar (12); The connector (2) includes two lead screws (21) and a basket (22) for connecting the two lead screws (21). The threads of the two lead screws (21) are opposite. The basket (22) has internal threads that match the threads of the lead screws (21). The ends of the two lead screws (21) away from the basket (22) are integrally formed with connecting end plates. A third pin hole is provided on the connecting end plate. The pin passes through the third pin hole and the second pin hole (15) to realize the rotational connection between the lead screw (21) and the triangular structure.

2. The spillway nose sill curved surface and overflow weir folding casting slipform structure according to claim 1, characterized in that: An operating platform (3) is provided on the front sliding form unit (1). The operating platform (3) is fixedly connected to the steel section (13). A steel pipe guardrail (4) is provided on the operating platform (3).

3. The spillway nose sill curved surface and overflow weir folding casting slipform structure according to claim 1, characterized in that: A vibrating platform (5) is provided on the rear sliding formwork unit (1), the vibrating platform (5) is fixedly connected to the sliding formwork (11), and a steel pipe railing (6) is provided on the vibrating platform (5).

4. The spillway nose sill curved surface and overflow weir folding casting slipform structure according to claim 1, characterized in that: A counterweight water tank (7) is provided on the sliding plate (11).

5. The spillway nose sill curved surface and overflow weir folding casting slipform structure according to claim 1, characterized in that: The nominal diameter of the thread of the lead screw (21) is 24 mm.

6. The spillway nose sill curved surface and overflow weir folding casting slipform structure according to claim 1, characterized in that: The length of the sliding template (11) is 40cm.

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