An adjustable positioning clamp for transverse prestressed steel bars in a continuous rigid frame bridge

Abstract

This application relates to the field of bridge construction technology and discloses an adjustable positioning clamp for transverse prestressed steel bars in a continuous rigid frame bridge, including a base, a sliding component, a lifting component, and a snap-fit ​​component. The sliding component is slidably mounted on the base. The lifting component is mounted on the sliding component and includes a first housing, which moves up and down along the direction from the base to the sliding component. The snap-fit ​​component includes a snap-fit ​​member with a connected snap-fit ​​portion and a rotating portion, the rotating portion being rotatably mounted on the first housing, and the snap-fit ​​portion having a snap-fit ​​groove. This application can adapt to the requirements of gradually changing heights and curved reinforcement layouts in variable cross-section box girders, eliminating the need for custom-made tooling for each span, improving material utilization, and reducing manufacturing costs.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, specifically to an adjustable positioning clamp for transverse prestressed steel bars in a continuous rigid frame bridge. Background Technology

[0002] As an important form of modern long-span bridge, continuous rigid frame bridges generally employ transverse prestressing systems in their box girder structures to resist transverse bending moments caused by live loads and shrinkage / creep, suppress the development of web cracks, and improve overall stiffness. The positioning accuracy of the transverse prestressing reinforcement is a key factor in ensuring effective prestress transfer and avoiding stress concentration, directly affecting the structural stress rationality, long-term durability, and service life of the bridge. If the positioning deviation exceeds the specified limits, it will lead to increased prestress loss, excessive local stress in the concrete, and even induce structural cracking and corrosion risks.

[0003] Currently, the positioning of transverse prestressed steel bars in construction mainly relies on the traditional formwork-assisted method. The specific process is as follows: first, the box girder formwork is installed, and the position of the steel bars is manually marked on the surface of the formwork according to the design drawings; then, the steel bars are placed at the marked points, and simple devices such as welded steel bar supports or wooden frames are used for on-site binding or welding fixation.

[0004] However, such methods are highly dependent on the experience of construction workers, and the positioning tools are mostly rigid clamps customized for specific cross-sections, requiring repeated installation, adjustment, and removal during the construction of each span. They cannot adapt to the height gradient and curved reinforcement requirements of variable cross-section box girders, requiring custom-made tooling for each span, resulting in low material utilization and high costs. Utility Model Content

[0005] This application provides an adjustable positioning fixture for transverse prestressed steel bars in a continuous rigid frame bridge to solve the problem that existing fixtures cannot adapt to the height gradient and curved reinforcement requirements of variable cross-section box girders, and that each span requires custom-made fixtures, resulting in low material utilization and high costs.

[0006] In a first aspect, this application provides an adjustable positioning clamp for transverse prestressed steel bars in a continuous rigid frame bridge, comprising:

[0007] A base and a sliding assembly, wherein the sliding assembly is slidably disposed on the base;

[0008] A lifting assembly, disposed on the sliding assembly, includes a first housing, the first housing being lifted and lowered along the direction from the base to the sliding assembly;

[0009] The snap-fit ​​assembly includes a snap-fit ​​member having a connected snap-fit ​​portion and a rotating portion, the rotating portion being rotatably disposed on the first housing, and the snap-fit ​​portion being provided with a snap-fit ​​groove.

[0010] Beneficial effects: By incorporating sliding and lifting components, the system can adapt to varying cross-sections of box girders and curved reinforcement arrangements, solving the problem of requiring custom-made traditional fixing clamps and reducing costs. The rotating design of the clamping part and the first housing allows for clamping of reinforcements with different curvatures, avoiding welding, protecting the anti-corrosion layer of the reinforcement, and eliminating the risk of rust.

[0011] In one optional implementation, the snap-fit ​​assembly further includes:

[0012] The ratchet is rotatably connected to the outer wall of the first housing;

[0013] The gear is located on the outside of the first housing;

[0014] A connecting rod having a first end and a second end opposite to each other, the first end of the connecting rod being connected to the gear;

[0015] A guiding device includes a guide cylinder and a limiting member. The guide cylinder is connected to the outer wall of the first housing. The limiting member is disposed inside the guide cylinder. The second end of the connecting rod is connected to the limiting member. The gear can slide between a first position and a second position along the axial direction of the guide cylinder. In the first position, the gear meshes with the ratchet. In the second position, the gear is disengaged from the ratchet.

[0016] The rotating part extends through the first housing and is connected to the ratchet via a first driving component.

[0017] Beneficial effects: By adjusting the relative position of the ratchet and the gear, the ratchet can be locked, thus fixing the rotation angle of the rotating part and ensuring that it does not shift under vibration, thereby improving the overall locking stability.

[0018] In one optional implementation, the limiting member includes:

[0019] An elastic element is disposed inside the guide cylinder and has a first end and a second end opposite to each other;

[0020] A first piston body is slidably disposed inside the guide cylinder along the axial direction of the guide cylinder, and has a first end and a second end opposite to each other. The first end of the first piston body is connected to the first end of the elastic member, and the second end of the first piston body is connected to the second end of the connecting rod.

[0021] The abutment is slidably disposed inside the guide cylinder along the axial direction of the guide cylinder and connected to the second end of the elastic member;

[0022] The elastic element has a tendency to drive the first piston body and the abutment member to separate from each other.

[0023] Beneficial effects: The elastic element provides leeway for the movement path of the gear and ensures that the gear always remains in contact with the ratchet, preventing the ratchet from reversing when locked in place. Ultimately, the combined effect achieves the fixation of the snap-fit ​​component.

[0024] In one alternative implementation, the sliding component includes:

[0025] A sliding plate has a first side and a second side opposite to each other, the first side of the sliding plate being slidably engaged with the base;

[0026] The second housing is slidably disposed on the second side of the sliding plate, the lifting assembly is disposed on the second housing, and the second housing and the sliding plate are connected by a second driving member.

[0027] Beneficial effect: Through the sliding engagement between the sliding plate and the second housing, the second housing can drive the snap-fit ​​component to make further fine adjustments.

[0028] In one alternative implementation, the sliding component further includes:

[0029] A slider is disposed on the first side of the sliding plate, and a guide groove is provided on the side of the base facing the sliding plate, and the slider is adapted to the guide groove.

[0030] Beneficial effects: The guide groove and guide plate can limit the sliding direction of the sliding component.

[0031] In one alternative embodiment, the distance between the two opposing sidewalls of the guide groove, parallel to its extension direction, gradually decreases along the direction from the base to the sliding plate.

[0032] Beneficial effect: By defining the shape of the guide groove and the guide block, the guide block can be prevented from slipping out of the guide groove.

[0033] In one alternative implementation, the sliding component further includes:

[0034] The abutting stud has an external thread on its outer wall, and the first side of the sliding plate has a threaded hole. The abutting stud is connected to the threaded hole by threads, and the abutting stud abuts against the base.

[0035] Beneficial effect: By turning the abutment stud, the abutment stud can be made to abut against the base, and finally the position of the sliding component can be fixed.

[0036] In one optional implementation, the lifting assembly further includes:

[0037] A first cylindrical body and a second cylindrical body, wherein the first cylindrical body is connected to the second housing and along the direction from the base to the sliding assembly, the second cylindrical body is slidably disposed within the first cylindrical body, and the end of the second cylindrical body away from the second housing is connected to the first housing;

[0038] The first cylinder and the second cylinder are connected by a third driving component.

[0039] Beneficial effects: The relative movement of the first and second cylinders is driven by the third driving component, thereby realizing the lifting and lowering of the snap-fit ​​component and adapting to different box girder heights.

[0040] In one optional embodiment, the snap-fit ​​portion includes:

[0041] A first plate segment, a second plate segment, and a third plate segment are connected in sequence. The first plate segment and the second plate segment are set at an angle to each other, and the third plate segment is set at an angle to the second plate segment. The first plate segment and the third plate segment are both located on the same side of the second plate segment. The area enclosed by the first plate segment, the second plate segment, and the third plate segment forms the slot. The rotating part is connected to the side of the second plate segment facing away from the slot.

[0042] Beneficial effects: The upward-facing opening of the slot facilitates the installation and removal of reinforcing bars, thus improving work efficiency.

[0043] In one alternative embodiment, elastic pads are provided on two opposite surfaces of the first plate segment and the third plate segment, respectively.

[0044] Beneficial effects: The elastic shims can fill the gaps between the reinforcing bars and the slab segments, preventing mechanical damage and also preventing relative slippage, thus ensuring the stability of the snap-fit ​​connection. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0046] Figure 1 This is a structural schematic diagram of an adjustable positioning clamp for transverse prestressed steel bars in a continuous rigid frame bridge, according to an embodiment of this application.

[0047] Figure 2 This is a schematic diagram of the snap-fit ​​assembly in an embodiment of this application;

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Base; 2. First housing; 3. Snap-fit ​​component; 4. Ratchet; 5. Gear; 6. Connecting rod; 7. Guide cylinder; 8. Quick wrench; 9. Elastic element; 10. First piston body; 11. Sliding plate; 12. Second housing; 13. First cylinder; 14. Second cylinder; 15. Horizontal fine-tuning screw; 16. First angle indicator; 17. Vertical fine-tuning screw; 18. Second angle indicator; 19. Guide groove; 20. Elastic washer; 21. Expansion bolt; 22. Anti-slip rubber pad. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] The following is combined Figures 1 to 2 This describes an embodiment of the present application.

[0052] According to an embodiment of this application, in one aspect, an adjustable positioning clamp for transverse prestressed steel bars of a continuous rigid frame bridge is provided, including a base 1, a sliding assembly, a lifting assembly, and a locking assembly. The sliding assembly is slidably disposed on the base 1. The lifting assembly is disposed on the sliding assembly and includes a first housing 2, which moves up and down along the direction from the base 1 to the sliding assembly. The locking assembly includes a locking member 3, having a connected locking portion and a rotating portion, the rotating portion being rotatably disposed on the first housing 2, and the locking portion having a locking groove.

[0053] It should be noted that the slot on the snap-fit ​​part is used to snap-fit ​​and position the transverse prestressed steel bars in the construction of continuous rigid frame bridges. When using it, the base 1 can be directly installed on the surface of the box girder formwork, and then the steel bars can be snap-fit ​​and positioned.

[0054] It is understandable that the sliding component and the base 1 slide together. After the base 1 is fixed, the snap-fit ​​3 can be moved to a preset position and positioned by adjusting the relative position between the sliding component and the base 1. The lifting component can be used to drive the snap-fit ​​3 to move vertically, thereby fixing it at different heights on the box girder. The first housing 2 in the lifting component can be used to support the snap-fit ​​3. The snap-fit ​​part of the snap-fit ​​3 is used to snap and position the reinforcing bar. The rotating part of the snap-fit ​​3 is rotatably connected to the first housing 2, thereby realizing the rotation of the snap-fit ​​part to match the curvature of the reinforcing bar.

[0055] Optionally, a scale can be set on the base 1 to facilitate precise positioning of the snap-fit ​​component 3.

[0056] In this embodiment, by setting up sliding and lifting components, it can adapt to the variable cross-section of the box girder and the arrangement of curved steel bars, solving the problem of traditional fixed clamps requiring customization and reducing costs. The rotational design of the snap-fit ​​part and the first housing 2 can realize the snap-fit ​​of steel bars with different curvatures, avoiding welding, protecting the anti-corrosion layer of the steel bars, and eliminating the risk of rust.

[0057] In one embodiment, the snap-fit ​​assembly further includes a ratchet 4, a gear 5, a connecting rod 6, and a guide device. The ratchet 4 is rotatably connected to the outer wall of the first housing 2. The gear 5 is disposed on the outer side of the first housing 2. The connecting rod 6 has a first end and a second end opposite to each other, and the first end of the connecting rod 6 is connected to the gear 5. The guide device includes a guide cylinder 7 and a limiting member. The guide cylinder 7 is connected to the outer wall of the first housing 2, the limiting member is disposed inside the guide cylinder 7, and the second end of the connecting rod 6 is connected to the limiting member. The gear 5 can slide along the axial direction of the guide cylinder 7 between a first position and a second position. In the first position, the gear 5 is engaged with the ratchet 4, and in the second position, the gear 5 is disengaged from the ratchet 4. The rotating part penetrates the first housing 2 and is connected to the ratchet 4 via a first driving member.

[0058] It should be noted that ratchet 4 is a commonly used mechanical structure in this field. Its teeth are set with an inclined structure, and multiple teeth are inclined in the same direction. This setting achieves the anti-reverse effect of ratchet 4.

[0059] The first driving component can be configured as a set of meshing bevel gears 5, with one bevel gear 5 mounted on the rotating part and the other bevel gear 5 mounted on the rotating shaft. One end of the rotating shaft is connected to a ratchet 4, and the rotation of the ratchet 4 drives the rotating shaft to rotate, thereby driving the rotating part to rotate. The other end of the rotating shaft can be rotatably connected to the first housing 2 via a bearing, and both the ratchet 4 and the rotating part are rotatably connected to the first housing 2 via bearings.

[0060] Understandably, the normal meshing of gear 5 and ratchet 4 prevents ratchet 4 from reversing, which is the first position. When adjusting the angle by rotating the locking component 3, since gear 5 does not rotate relative to it, the rotating ratchet 4 exerts a thrust on gear 5, pushing it towards the guide cylinder 7 until the teeth of gear 5 disengage from the teeth of ratchet 4. At this point, gear 5 is in the second position. As ratchet 4 continues to rotate, gear 5 returns to the first position. This process repeats, thus achieving the rotation of the locking component 3.

[0061] In this embodiment, by adjusting the relative position of the ratchet 4 and the gear 5, the ratchet 4 can be locked, thereby fixing the rotation angle of the rotating part, ensuring that it does not shift under vibration, and improving the overall locking stability.

[0062] In one embodiment, the limiting member includes an elastic element 9, a first piston body 10, and an abutment. The elastic element 9 is disposed within the guide cylinder 7 and has opposing first and second ends. The first piston body 10 is slidably disposed within the guide cylinder 7 along the axial direction of the guide cylinder 7 and has opposing first and second ends. The first end of the first piston body 10 is connected to the first end of the elastic element 9, and the second end of the first piston body 10 is connected to the second end of the connecting rod 6. The abutment is slidably disposed within the guide cylinder 7 along the axial direction of the guide cylinder 7 and is connected to the second end of the elastic element 9. The elastic element 9 has a tendency to drive the first piston body 10 and the abutment to separate from each other.

[0063] It should be noted that when gear 5 is in the first position, the elastic element 9 is in a relaxed state and has a compression margin. During the rotation of ratchet 4, gear 5 transitions from the first position to the second position. The first piston 10 continuously squeezes the elastic element 9, causing the elastic element 9 to compress, thereby realizing the change in the position of gear 5.

[0064] When the snap-fit ​​component 3 rotates to a preset angle and snaps into the reinforcing bar, the ratchet 4 needs to be fixed to prevent it from rotating further. An abutment component is used to compress the elastic component 9, thereby eliminating any excess compression. The abutment component includes a quick-release wrench 8, which is rotatably connected to the guide cylinder 7. A screw is also connected to the end of the quick-release wrench 8 connected to the guide cylinder 7. The screw is located inside the guide cylinder 7, and the inner cavity of the guide cylinder 7 is rectangular or polygonal. A second piston body is also provided inside the guide cylinder 7. The elastic component 9 is located between the first piston body 10 and the second piston body. The second piston body can be configured as a columnar structure, with a threaded hole on the side facing the screw. The threaded hole is threadedly connected to the screw. Thus, rotating the quick-release wrench 8 in the forward direction reduces the distance between the first piston body 10 and the second piston body, while rotating the quick-release wrench 8 in the reverse direction increases the distance between them.

[0065] Understandably, the elastic element 9 is set as a spring.

[0066] In this embodiment, the elastic element 9 provides leeway for the movement path of the gear 5 and ensures that the gear 5 always remains in contact with the ratchet 4, preventing the ratchet 4 from reversing in the locked state. Ultimately, the combined effect achieves the fixation of the position of the snap-fit ​​element 3.

[0067] In one embodiment, the sliding assembly includes a sliding plate 11 and a second housing 12. The sliding plate 11 has a first side and a second side opposite to each other, and the first side of the sliding plate 11 is slidably engaged with the base 1. The second housing 12 is slidably disposed on the second side of the sliding plate 11, a lifting assembly is disposed on the second housing 12, and the second housing 12 and the sliding plate 11 are connected by a second driving member.

[0068] It should be noted that the second driving component includes a horizontal fine-tuning screw 15, which penetrates the second housing 12. The portion of the horizontal fine-tuning screw 15 located inside the second housing 12 is connected to a displacement module (existing technology, which will not be described in detail again) via a set of bevel gears 5. The guide rail structure of the displacement module is connected to one of the sliding plate 11 and the second housing 12, and the slider structure of the displacement module is connected to the other of the sliding plate 11 and the second housing 12. The horizontal fine-tuning screw 15 is threadedly connected to the screw structure of the displacement module via a set of bevel gears 5 or a set of gears 5. Therefore, the second driving component can be located on either side of the second housing 12.

[0069] In addition, the horizontal fine-tuning screw 15 is connected to a first angle indicator disk 16. The horizontal fine-tuning screw 15 adopts a fine-pitch thread design with a lead of 1 mm, meaning that each rotation of the horizontal fine-tuning screw 15 achieves a displacement of 1 mm. Each 15° rotation of the pointer on the first angle indicator disk 16 corresponds to a displacement of 0.25 mm. Through this precise fit, micron-level fine adjustment can be achieved, thus meeting the requirements of high-precision positioning.

[0070] In this embodiment, the sliding plate 11 and the second housing 12 can be slidably engaged to enable the second housing 12 to drive the snap-fit ​​3 to make further fine adjustments.

[0071] In one embodiment, the sliding assembly further includes a slider. The slider is disposed on a first side of the sliding plate 11, and a guide groove 19 is provided on the side of the base 1 facing the sliding plate 11, and the slider is adapted to the guide groove 19.

[0072] In this embodiment, the guide groove 19 and the guide plate can limit the sliding direction of the sliding component.

[0073] In one embodiment, the distance between the two opposing sidewalls of the guide groove 19, which are parallel to its extension direction, gradually decreases along the direction from the base 1 to the sliding plate 11.

[0074] Optionally, the guide groove 19 can be configured as a dovetail groove.

[0075] In this embodiment, by defining the shapes of the guide groove 19 and the guide block, the guide block can be prevented from slipping out of the guide groove 19.

[0076] In one embodiment, the sliding assembly further includes an abutment stud with external threads on its outer wall, a threaded hole on the first side of the sliding plate 11, the abutment stud and the threaded hole being connected by threads, and the abutment stud abutting against the base 1.

[0077] Understandably, due to the guide groove 19 of the variable diameter structure and the slider, the sliding plate 11 can be prevented from detaching from the base 1 in the vertical direction. After the sliding plate 11 reaches the designated position, the sliding plate 11 can be fixed by turning the abutment stud.

[0078] In this embodiment, the abutment stud can be made to abut against the base 1 by turning the abutment stud, and finally the position of the sliding component is fixed.

[0079] In one embodiment, the lifting assembly further includes a first cylinder 13 and a second cylinder 14. The first cylinder 13 is connected to the second housing 12, and the second cylinder 14 is slidably disposed within the first cylinder 13 along the direction from the base 1 to the sliding assembly. One end of the second cylinder 14 away from the second housing 12 is connected to the first housing 2. The first cylinder 13 and the second cylinder 14 are connected by a third driving member.

[0080] It should be noted that the third driving component includes a vertical fine-tuning screw 17, which penetrates the second housing 12. The portion of the vertical fine-tuning screw 17 located inside the second housing 12 is connected to a displacement module (existing technology, which will not be described in detail again) via a set of bevel gears 5. The second cylinder 14 is connected to the second housing 12. The guide rail structure of the displacement module is connected to one of the second housing 12 and the second cylinder 14, and the slider structure of the displacement module is connected to the other of the second housing 12 and the second cylinder 14. The vertical fine-tuning screw 17 is threadedly connected to the screw structure of the displacement module via a set of bevel gears 5 or a set of gears 5. Therefore, the third driving component can be located on either side of the second housing 12.

[0081] Furthermore, the vertical fine-tuning screw 17 is connected to a second angle indicator 18. The vertical fine-tuning screw 17 employs a fine-pitch thread design with a lead of 1 mm, meaning that each rotation of the vertical fine-tuning screw 17 achieves a displacement of 1 mm. Each 15° rotation of the pointer on the second angle indicator 18 corresponds to a displacement of 0.25 mm. This precise fit allows for micron-level fine adjustment, thus meeting the requirements of high-precision positioning.

[0082] In this embodiment, the relative movement of the first cylinder 13 and the second cylinder 14 is driven by the third driving member, thereby realizing the lifting and lowering of the snap-fit ​​member 3 and adapting to different box girder heights.

[0083] In one embodiment, the snap-fit ​​portion includes a first plate segment, a second plate segment, and a third plate segment connected in sequence. The first plate segment and the second plate segment are arranged at an angle, and the third plate segment is arranged at an angle to the second plate segment. The first plate segment and the third plate segment are both located on the same side of the second plate segment. The area enclosed by the first plate segment, the second plate segment, and the third plate segment forms a slot. The rotating portion is connected to the side of the second plate segment facing away from the slot.

[0084] In this embodiment, the opening of the slot is set upward, which facilitates the installation and removal of the reinforcing bars and improves work efficiency.

[0085] In one embodiment, elastic gaskets 20 are respectively provided on two opposite surfaces of the first plate segment and the third plate segment.

[0086] It should be noted that the elastic pad 20 can be set as an elastic rubber liner with a diamond-patterned anti-slip texture on its surface, with a texture depth of 0.5mm. This design significantly increases the coefficient of friction between the elastic pad 20 and the reinforcing bar to a high friction level of 0.8 during clamping.

[0087] In this embodiment, the elastic gasket 20 can fill the gap between the reinforcing bar and the plate segment, avoid mechanical damage, and at the same time prevent relative sliding, ensuring the stability of the snap-fit.

[0088] In one embodiment, a fixing hole is provided on the base 1, through which an expansion bolt 21 passes and is connected to the box girder template. An anti-slip rubber pad 22 is provided on the outer wall of the expansion bolt 21 that passes through the fixing hole to ensure that there is no displacement under construction vibration.

[0089] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A continuously rigid frame bridge transverse prestressed steel bar adjustable positioning fixture, characterized in that, include: A base (1) and a sliding assembly, wherein the sliding assembly is slidably disposed on the base (1); A lifting assembly is disposed on the sliding assembly and includes a first housing (2), which lifts and lowers along the direction from the base (1) to the sliding assembly; The snap-fit ​​assembly includes a snap-fit ​​member (3) having a snap-fit ​​part and a rotating part connected together. The rotating part is rotatably disposed on the first housing (2), and the snap-fit ​​part is provided with a snap-fit ​​groove.

2. The adjustable positioning fixture for transversely prestressed reinforcement of continuous rigid frame bridges according to claim 1, characterized in that, The snap-fit ​​assembly also includes: The ratchet (4) is rotatably connected to the outer wall of the first housing (2); Gear (5) is disposed on the outside of the first housing (2); A connecting rod (6) has a first end and a second end opposite to each other, the first end of the connecting rod (6) being connected to the gear (5); The guiding device includes a guide cylinder (7) and a limiting member. The guide cylinder (7) is connected to the outer wall of the first housing (2). The limiting member is disposed inside the guide cylinder (7). The second end of the connecting rod (6) is connected to the limiting member. The gear (5) can slide between a first position and a second position along the axial direction of the guide cylinder (7). In the first position, the gear (5) meshes with the ratchet (4). In the second position, the gear (5) separates from the ratchet (4). The rotating part passes through the first housing (2) and is connected to the ratchet (4) via a first driving member.

3. The adjustable positioning fixture for transversely prestressed reinforcement of continuous rigid frame bridges according to claim 2, characterized in that, The limiting component includes: An elastic element (9) is disposed inside the guide cylinder (7) and has a first end and a second end opposite to each other; The first piston body (10) is slidably disposed in the guide cylinder (7) along the axial direction of the guide cylinder (7), and has a first end and a second end opposite to each other. The first end of the first piston body (10) is connected to the first end of the elastic member (9), and the second end of the first piston body (10) is connected to the second end of the connecting rod (6). The abutting member is slidably disposed inside the guide cylinder (7) along the axial direction of the guide cylinder (7) and connected to the second end of the elastic member (9); The elastic element (9) has a tendency to drive the first piston body (10) and the abutting element to separate from each other.

4. The adjustable positioning fixture for transverse prestressing reinforcement of continuous rigid frame bridges according to any one of claims 1 to 3, characterized in that, The sliding component includes: A sliding plate (11) has a first side and a second side opposite to each other, and the first side of the sliding plate (11) is slidably engaged with the base (1); The second housing (12) is slidably disposed on the second side of the sliding plate (11), the lifting assembly is disposed on the second housing (12), and the second housing (12) and the sliding plate (11) are connected by a second driving member.

5. The adjustable positioning fixture for transverse prestressed steel bars of a continuous rigid frame bridge according to claim 4, characterized in that, The sliding component also includes: A slider is disposed on the first side of the sliding plate (11), and a guide groove (19) is provided on the side of the base (1) facing the sliding plate (11), and the slider is adapted to the guide groove (19).

6. The transversely prestressed reinforced adjustable positioning fixture for continuous rigid frame bridge according to claim 5, characterized in that, The distance between the two opposing sidewalls of the guide groove (19) parallel to its extension direction gradually decreases along the direction from the base (1) to the sliding plate (11).

7. The transversely prestressed reinforced adjustable positioning fixture for continuous rigid frame bridges according to claim 6, characterized in that, The sliding component also includes: The abutting stud has an external thread on its outer wall, and the first side of the sliding plate (11) has a threaded hole. The abutting stud is connected to the threaded hole by a thread, and the abutting stud abuts against the base (1).

8. The adjustable positioning fixture for transverse prestressed steel bars of a continuous rigid frame bridge according to claim 4, characterized in that, The lifting assembly also includes: A first cylindrical body (13) and a second cylindrical body (14), wherein the first cylindrical body (13) is connected to the second housing (12) and along the direction from the base (1) to the sliding assembly, the second cylindrical body (14) is slidably disposed inside the first cylindrical body (13), and one end of the second cylindrical body (14) away from the second housing (12) is connected to the first housing (2); The first cylinder (13) and the second cylinder (14) are connected by a third driving component.

9. The adjustable positioning fixture for transverse prestressed steel bars of a continuous rigid frame bridge according to any one of claims 1 to 3, characterized in that, The snap-fit ​​portion includes: A first plate segment, a second plate segment, and a third plate segment are connected in sequence. The first plate segment and the second plate segment are set at an angle to each other, and the third plate segment is set at an angle to the second plate segment. The first plate segment and the third plate segment are both located on the same side of the second plate segment. The area enclosed by the first plate segment, the second plate segment, and the third plate segment forms the slot. The rotating part is connected to the side of the second plate segment facing away from the slot.

10. The adjustable positioning fixture for transversely prestressed reinforcement of continuous rigid frame bridges according to claim 9, characterized in that, The first plate segment and the third plate segment are respectively provided with elastic gaskets (20) on their two opposite surfaces.

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