Pre-tensioning method pedestal for double T beams with different spans

Abstract

The utility model discloses a pre-tensioning method pedestal for double T-shaped beams with different spans, which relates to the field of pre-stressed concrete simply supported double T-shaped beam tensioning pedestals, and comprises a base assembly, the base assembly comprises a double T-shaped beam forming frame formed by a plurality of standard sections which are detachably connected, and the double T-shaped beam forming frame is provided with a plurality of cross sections. The standard section comprises a fixed frame and a double-T-beam mold located in the fixed frame. And the tension assemblies are located at the two ends of the double-T-beam forming frame and comprise anchoring units located at the ends of the double-T-beam forming frame and tensioning units located on the double-T-beam forming frame and capable of horizontally moving on the double-T-beam forming frame, and anchoring pull rods are arranged between the anchoring units and the tensioning units. The double-T-beam forming frame is divided into the multiple detachably connected standard sections, the overall length of the double-T-beam forming frame can be adjusted according to the assembly number of the standard sections so that the double-T-beam forming frame can be suitable for double-T beams of different spans, overall universality is high, and capital complaints and site investment can be greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of tensioning platforms for prestressed concrete simply supported double-T beams, specifically to a pre-tensioning platform for double-T beams of different spans. Background Technology

[0002] Prestressed concrete simply supported beams are generally constructed using prefabricated methods. From an economic perspective, precast structures are more suitable for factory production. Precast beams can be constructed using pre-tensioning and post-tensioning methods. Compared to post-tensioning, pre-tensioning is simpler, relying on the bond between the prestressed steel strands and the concrete itself for anchorage. It eliminates the need for specialized anchorages, and tool-type anchorages or clamps can be reused. Moreover, the finished product has stable quality, and its economic advantages become apparent in mass production, making it suitable for the factory production of small and medium-sized components.

[0003] However, the pre-tensioning construction production line requires a large platform or a batch of fixed equipment such as steel molds and curing pools, resulting in a large initial investment. When the transportation distance is long or there is no large number of precast beams to ensure continuous production, the fixed platform size cannot be applied to double T beams of different spans, which leads to the inability to reuse the platform and increases investment costs, resulting in poor economic efficiency. Utility Model Content

[0004] This application provides a pre-tensioning pedestal for double T-beams of different spans, which can solve the technical problem in the prior art that the traditional pedestal has a fixed size and cannot be applied to double T-beams of different spans, resulting in the inability to reuse it and high investment costs.

[0005] This application provides a pre-tensioning platform for double T-beams of different spans, comprising:

[0006] A base assembly comprising a double T-beam forming frame consisting of a plurality of detachably connected standard segments, each standard segment including a fixed frame and a double T-beam mold located within the fixed frame;

[0007] Tension assemblies are located at both ends of the double T-beam forming frame. The tension assemblies include anchoring units located at the ends of the double T-beam forming frame and tensioning units located on the double T-beam forming frame and capable of translation on the double T-beam forming frame. An anchoring rod is provided between the anchoring unit and the tensioning unit.

[0008] In one embodiment, the bottom of the fixed frame is provided with a padding steel channel for connecting the double T-beam mold.

[0009] In one embodiment, the anchoring unit includes a box truss and at least one anchoring beam located on the side of the box truss away from the tensioning unit.

[0010] In one embodiment, one end of the anchoring tie rod passes through the anchoring beam and the box truss, and the other end passes through the tensioning unit.

[0011] In one embodiment, the two ends of the anchor rod are provided with fixing clamps.

[0012] In one embodiment, the longitudinal section shape of the box truss is consistent with the longitudinal section shape of the fixed frame, and an end anchor connecting beam is provided between the box truss and the fixed frame.

[0013] In one embodiment, the tensioning unit includes a tensioning trolley for connecting prestressed steel bars, and a jack is provided on the side of the tensioning trolley away from the anchoring unit for pushing the tensioning trolley toward the anchoring unit.

[0014] In one embodiment, both the double-T beam forming frame and the bottom of the anchoring unit are provided with concrete pads.

[0015] In one embodiment, the double-T beam forming frame is provided with a prestressed steel bar bogie near the tensioning unit.

[0016] In one embodiment, the double T-beam forming frame is further provided with a plurality of bending units, the bending unit including a prestressed steel strand bending device located on the surface of the double T-beam mold and a counterweight block located at the bottom of the double T-beam forming frame and opposite to the position of the prestressed steel strand bending device.

[0017] The beneficial effects of the technical solutions provided in this application include:

[0018] The pre-tensioning platform in this application decomposes the double T-beam forming frame into multiple detachable and connectable standard sections. The overall length of the double T-beam forming frame can be adjusted by the number of standard sections assembled, so as to be suitable for double T-beams with different spans. It has high overall versatility and can significantly reduce financial complaints and site investment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A front view of a pre-tensioning platform for double T-beams of different spans provided in an embodiment of this application;

[0021] Figure 2A standard section view of a pre-tensioned support for double T-beams of different spans, provided in an embodiment of this application;

[0022] Figure 3 A schematic diagram of a double-T beam mold structure in a pre-tensioning platform for double-T beams of different spans, provided in an embodiment of this application;

[0023] Figure 4 A schematic diagram of the tension assembly structure in a pre-tensioning platform for double T-beams of different spans, provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of a square frame structure in a pre-tensioning platform for double T-beams of different spans, provided as an embodiment of this application.

[0025] In the diagram: 1. Double T-beam forming frame; 2. Fixed frame; 201. Frame beam; 202. Crossbeam; 203. Support beam; 3. Double T-beam mold; 301. Bottom mold; 302. Outer mold; 303. Inner mold; 4. Anchoring unit; 401. Box truss; 402. Anchoring beam; 5. Tensioning unit; 501. Tensioning trolley; 6. Anchoring tie rod; 601. Fixing clamp; 7. Pad steel channel; 8. End anchor connecting beam; 9. Concrete pad; 10. Prestressed steel bogie; 11. Prestressed steel strand bender; 12. Counterweight. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0027] This application provides a pre-tensioning platform for double T-beams of different spans, which solves the technical problem in the prior art where the traditional platform has a fixed size, cannot be applied to double T-beams of different spans, and therefore cannot be reused, resulting in high investment costs.

[0028] The pre-tensioning platform in this application includes a base assembly and a tension assembly. The base assembly is mainly used for casting and forming the double T-beam, and the tension assembly is located on both sides of the base assembly and is mainly used to apply tension to the prestressed steel bars in the double T-beam before casting.

[0029] Specifically, Figure 1 A front view of a pre-tensioning platform for double T-beams of different spans provided in this application embodiment, as shown below. Figure 1As shown, the base assembly includes a double-T beam forming frame 1 composed of multiple detachably connected standard sections. The number of standard sections can be determined according to the actual span of the double-T beam. The multiple standard sections can be detachably connected. In one possible implementation, the splicing points of two adjacent standard sections are spliced ​​by connecting flanges to ensure connection stability. The multiple standard sections, combined with transfer equipment or hoisting equipment, can realize the length adjustment of the double-T beam forming frame 1 to adapt to the pouring length requirements of double-T beams with different spans.

[0030] Furthermore, Figure 2 A standard section cross-sectional view of a pre-tensioned support for double T-beams of different spans, provided as an embodiment of this application, is shown below. Figure 2 As shown, the standard section includes a fixed frame 2 and a double T-beam mold 3 located within the fixed frame 2. Each standard section has the same specifications. The fixed frame 2 is mainly used to improve structural stability. The double T-beam mold 3 is detachably installed within the fixed frame 2. After assembly, the double T-beam mold 3 located in the middle is horizontally positioned and horizontally connected. After multiple standard sections are spliced ​​together, the double T-beam molds 3 located at the outermost two ends are sealed on the side facing outward to form a complete mold.

[0031] Further, see Figure 1 The tension assembly is located at both ends of the double T-beam forming frame 1 to apply tension in opposite directions to the prestressed steel bars in the double T-beam. Specifically, the tension assembly includes an anchoring unit 4 located at the end of the double T-beam forming frame 1 and a tensioning unit 5 located on the double T-beam forming frame 1 and capable of translating on the double T-beam forming frame 1. An anchoring rod 6 is provided between the anchoring unit 4 and the tensioning unit 5.

[0032] During the tensioning process, two tensioning units 5 are connected to both ends of the prestressed steel bar. The two tensioning units 5 are translated towards the anchoring unit 4 on the same side. After the prestressed steel bar reaches the predetermined stress level, the distance between the tensioning unit 5 and the anchoring unit 4 is fixed by the anchoring rod 6 to prevent the prestressed steel bar from shrinking back.

[0033] Further, see Figure 2 The bottom of the fixed frame 2 is provided with a pad steel groove 7 for connecting the double T-beam mold 3. In one embodiment of this application, Figure 3 This application provides a schematic diagram of the structure of a double-T beam mold 3 in a pre-tensioning platform for double-T beams of different spans, as shown in the embodiments of this application. Figure 3As shown, the double T-beam mold 3 includes two bottom molds 301, outer molds 302 located on the outside of the two bottom molds 301 respectively, and inner molds 303 connecting the inside of the two bottom molds 301. Based on the shape of the double T-beam mold 3, the number of padding steel channels 7 is two rows. The two rows of padding steel channels 7 are located below the two bottom molds 301 respectively and are arranged along the length direction of the double T-beam forming frame 1. The double T-beam mold 3 and the padding steel channels 7 are detachably connected to facilitate the replacement of double T-beam molds 3 of different sizes. The connection method between the two includes, but is not limited to, pin connection, bolt connection, snap connection, etc., and no specific limitation is made in this application.

[0034] Furthermore, Figure 4 A schematic diagram of the tension assembly structure in a pre-tensioning platform for double T-beams of different spans, provided as an embodiment of this application, is shown below. Figure 4 The anchoring unit 4 includes a box truss 401 and at least one anchoring beam 402 located on the side of the box truss 401 away from the tensioning unit 5. One end of the anchoring rod 6 passes through the anchoring beam 402 and the box truss 401, and the other end passes through the tensioning unit 5. Fixing clamps 601 are provided at both ends of the anchoring rod 6.

[0035] Anchor beams 402 are arranged laterally on the side of box truss 401 away from tensioning unit 5. One end of anchor rod 6 passes through anchor beam 402 and box truss 401, and a fixing clamp 601 is provided at the end of the rod. Similarly, the other end of anchor rod 6 passes through tensioning unit 5, and a fixing clamp 601 is provided at the end of the rod. The number of anchor beams 402 is determined by the number of tensioning bars. When there are multiple anchor beams 402, the multiple anchor beams 402 are equidistantly arranged along the height direction of box truss 401. Based on this, It can only limit the displacement of the tensioning unit 5 to prevent the tensioning unit 5 from being pulled back by the prestressed steel bars. At the same time, while applying tension to the prestressed steel bars, the anchor rod 6 will translate together with the tensioning unit 5 toward the box truss 401. That is, the rod of the anchor rod 6 protruding from the anchor beam 402 will gradually grow longer. Then, by adjusting the position of the fixing clamp 601 at the end of the anchor rod 6 protruding from the anchor beam 402, the current position of the anchor rod 6 can be fixed to fix the distance between the tensioning unit 5 and the anchoring unit 4.

[0036] After the fixing clamp 601 is adjusted, the recoil force of the prestressed steel bars will be transmitted to the anchoring rod 6 through the tensioning unit 5, and then to the anchoring beam 402 through the anchoring rod 6. Based on this, the anchoring beam 402 can disperse and transmit the recoil force to the entire box truss 401 to improve structural stability. The fixing clamp 601 is a commonly used component in the casting of double T-beams, and will not be described in detail here.

[0037] Furthermore, the longitudinal section shape of the box truss 401 is consistent with that of the fixed frame 2, and an end anchor connecting beam 8 is provided between the box truss 401 and the fixed frame 2. Both the box truss 401 and the fixed frame 2 have square sections. In one embodiment of this application, there are four end anchor connecting beams 8, which are located at the four apex corners of the box truss 401 and the fixed frame 2, respectively. Furthermore, in order to increase the connection stability between the end anchor connecting beams 8, a connecting vertical beam is provided between the two end anchor connecting beams 8 arranged vertically on the same side.

[0038] Furthermore, the tensioning unit 5 includes a tensioning trolley 501 for connecting prestressed steel bars. A jack is provided on the side of the tensioning trolley 501 furthest from the anchoring unit 4 to push the tensioning trolley 501 toward the anchoring unit 4. The two tensioning trolleys 501 can be laterally moved on the double-T-beam forming frame 1, and the range of movement does not exceed the length of the anchoring tie rod 6. They are mainly used to connect the two ends of the prestressed steel bars to ensure their stability. Two jacks are also provided, with their fixed ends on the double-T-beam forming frame 1 and their telescopic ends facing the tensioning trolleys 501. The two jacks push the two tensioning trolleys 501 toward each other to tension the prestressed steel bars.

[0039] Further, see Figure 1 Both the bottom of the double T-beam forming frame 1 and the anchoring unit 4 are equipped with concrete pads 9. Multiple concrete pads 9 are spaced apart along the length of the double T-beam forming frame 1 to provide an operating platform for construction.

[0040] Further, see Figure 1 The double-T beam forming frame 1 is equipped with a prestressed steel bar bogie 10 near the tensioning unit 5. The prestressed steel bar bogie 10 is mainly used to change the direction of the prestressed steel bars to ensure their correct arrangement in the double-T beam forming frame 1. Through the prestressed steel bar bogie 10, the prestressed steel bars can be bent and turned according to design requirements, thereby meeting the stress requirements of the double-T beam. The tensioning unit 5 needs to tension the prestressed steel bars, and the prestressed steel bar bogie 10 can ensure that the prestressed steel bars maintain the correct direction during the tensioning process. Therefore, the prestressed steel bar bogie 10 needs to be set close to the tensioning unit 5.

[0041] Further, see Figure 1 The double T-beam forming frame 1 is also provided with several bending units. The bending unit includes a prestressed steel strand bending device 11 located on the surface of the double T-beam forming frame 1 and a counterweight block 12 located at the bottom of the double T-beam forming frame 1 and opposite to the position of the prestressed steel strand bending device 11.

[0042] The prestressed steel strand bender 11 is located on the surface of the double-T beam forming frame 1. The position of the prestressed steel strand bender 11 is not limited in this application and can be determined according to actual usage requirements. Its main function is to change the direction of the prestressed steel strands, causing them to bend according to design requirements. This bending is usually to meet the stress requirements of the double-T beam, improving the beam's load-bearing capacity and bending stiffness. In the double-T beam forming frame 1, the prestressed steel strand bender 11 changes the direction of the prestressed steel strands to meet the stress requirements of the double-T beam, while the counterweight 12 increases the weight of the double-T beam forming frame 1 and lowers its center of gravity, improving the stability of the double-T beam forming frame 1 during the casting process. This synergistic effect allows the double-T beam forming frame 1 to better meet construction requirements, ensuring the quality and safety of the beam. As an optional embodiment, the counterweight 12 is connected to the double-T beam forming frame 1 through several precision-rolled threaded steel rods.

[0043] Furthermore, as an optional embodiment, the fixed frame 2 in this application comprises a plurality of square frames spaced apart along the length direction of the double T-beam forming frame 1. Figure 5 A schematic diagram of a square frame structure in a pre-tensioned platform for double T-beams of different spans, provided as an embodiment of this application, is shown below. Figure 5 As shown, each square frame consists of at least four frame beams 201 connected end to end, and multiple square frames are connected by four crossbeams 202 to form a whole. The four crossbeams 202 are located at the four top corners of the square frame, which are the end-to-end connection points of the four frame beams 201. The frame beams 201 and crossbeams 202 are equipped with fittings to facilitate connection between them to form a whole. The cross section of the box truss 401 is the same as the cross section of the fixed frame 2, which will not be described in detail here.

[0044] Furthermore, based on the above description, it can be seen that the fixed frame 2 is provided with two padding steel channels 7 for connecting the double T-beam mold 3. Therefore, in one embodiment of this application, each square frame is provided with two support beams 203 on the frame beam 201 located at the bottom. The support beams 203 and the crossbeams 202 are arranged in the same way, and both are horizontally connected to multiple square frames. The two padding steel channels 7 in the fixed frame 2 are respectively set on the two support beams 203.

[0045] The pre-tensioning platform in this application decomposes the double T-beam forming frame 1 into multiple detachable and connectable standard sections. The overall length of the double T-beam forming frame 1 can be adjusted by the number of standard sections assembled, so as to be suitable for double T-beams with different spans. It has high overall versatility and can significantly reduce financial complaints and site investment.

[0046] In the description of this application, it should be noted that the terms "upper," "lower," 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 application 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 of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0047] It should be noted that in this application, 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. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0048] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A pre-tensioning platform for double T-beams of different spans, characterized in that, include: The base assembly includes a double T-beam forming frame (1) consisting of a plurality of detachably connected standard segments, each standard segment including a fixed frame (2) and a double T-beam mold (3) located within the fixed frame (2); Tension assemblies are located at both ends of the double T-beam forming frame (1). The tension assemblies include anchoring units (4) located at the ends of the double T-beam forming frame (1) and tensioning units (5) located on the double T-beam forming frame (1) and movable on the double T-beam forming frame (1). An anchoring rod (6) is provided between the anchoring unit (4) and the tensioning unit (5).

2. The pre-tensioning platform for double T-beams of different spans as described in claim 1, characterized in that, The bottom of the fixed frame (2) is provided with a padding steel channel (7) for connecting the double T-beam mold (3).

3. A pre-tensioning platform for double T-beams of different spans as described in claim 1, characterized in that, The anchoring unit (4) includes a box truss (401) and at least one anchoring beam (402) located on the side of the box truss (401) away from the tensioning unit (5).

4. A pre-tensioning platform for double T-beams of different spans as described in claim 3, characterized in that, One end of the anchoring rod (6) passes through the anchoring beam (402) and the box truss (401), and the other end passes through the tensioning unit (5).

5. A pre-tensioning platform for double T-beams of different spans as described in claim 4, characterized in that, The anchor rod (6) is provided with fixing clamps (601) at both ends.

6. A pre-tensioning platform for double T-beams of different spans as described in claim 3, characterized in that, The longitudinal section shape of the box truss (401) is consistent with that of the fixed frame (2), and an end anchor connecting beam (8) is provided between the box truss (401) and the fixed frame (2).

7. A pre-tensioning platform for double T-beams of different spans as described in claim 1, characterized in that, The tensioning unit (5) includes a tensioning trolley (501) for connecting the prestressed steel bars. The tensioning trolley (501) is provided with a jack on the side away from the anchoring unit (4) for pushing the tensioning trolley (501) toward the anchoring unit (4).

8. A pre-tensioning platform for double T-beams of different spans as described in claim 1, characterized in that, Both the double T-beam forming frame (1) and the anchoring unit (4) are provided with concrete pads (9) at their bottom.

9. A pre-tensioning platform for double T-beams of different spans as described in claim 8, characterized in that, The double T-beam forming frame (1) is equipped with a prestressed steel bar bogie (10) near the tensioning unit (5).

10. A pre-tensioning platform for double T-beams of different spans as described in claim 9, characterized in that, The double T-beam forming frame (1) is also provided with several bending units. The bending unit includes a prestressed steel strand bending device (11) located on the surface of the double T-beam mold (3) and a counterweight block (12) located at the bottom of the double T-beam forming frame (1) and opposite to the position of the prestressed steel strand bending device (11).

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