Prestress reinforced bridge body structure and construction method

Abstract

The invention relates to the technical field of reinforced concrete structure bridge reinforcement, and discloses a prestressed reinforced bridge body structure and a construction method.The prestressed reinforced bridge body structure comprises a reinforced concrete bridge body, a vertical tensioning assembly and a transverse tensioning assembly are arranged on the reinforced concrete bridge body, the vertical tensioning assembly is composed of two vertical tensioning structures, and the transverse tensioning assembly is composed of two transverse tensioning structures. The transverse tensioning assembly is composed of two vertical tensioning structures, each vertical tensioning structure comprises a first prestressed tendon, the transverse tensioning assembly is composed of two transverse tensioning structures, and each transverse tensioning structure comprises a second prestressed tendon. Through combination of transverse tensioning and vertical tensioning, a space stress net is formed, transverse deformation and the torsion effect of the beam body are effectively limited, meanwhile, stress distribution in concrete is improved through oblique compressive pre-stress, and the overall stability of the beam body is kept under the combined action of a vertical load and a transverse load.

Description

Technical Field

[0001] This invention relates to the field of reinforced concrete bridge technology, and particularly to prestressed reinforced bridge beam structures and construction methods. Background Technology

[0002] Steel-concrete composite bridges are composite bridge structures that combine the advantages of steel and concrete materials. They are widely used in highways, railways, and urban transportation. Through the synergistic work of steel and concrete, they achieve a balance between high strength, durability, and economy.

[0003] In practical engineering applications, especially in structures such as bridges that are exposed to complex environments for a long time, conventional anchorages have insufficient pull-out resistance and limited force transmission performance under heavy load conditions such as typhoons and strong winds. This weakens the effective compensation ability of prestressed tendons for the stress state of the steel beam, resulting in poor overall wind resistance stability and wind vibration response control of the structure.

[0004] Therefore, it is necessary to design prestressed reinforcement bridge beam structures and construction methods to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a prestressed reinforcement method for bridge beam structures and construction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A prestressed reinforced bridge beam structure includes a steel-concrete bridge beam. The steel-concrete bridge beam is equipped with a vertical tensioning assembly and a horizontal tensioning assembly. The vertical tensioning assembly consists of two vertical tensioning structures, each of which includes a first prestressing tendon. The horizontal tensioning assembly consists of two horizontal tensioning structures, each of which includes a second prestressing tendon. The second prestressing tendon consists of a horizontal part and an inclined part. The inclined part consists of a load-bearing part and a tensioning part. The four load-bearing parts together form an X-shaped distribution. The bottom surface of the steel-concrete bridge beam is provided with a tensioning assembly for applying tension to the first prestressed tendon and the second prestressed tendon. The tensioning assembly includes a sliding sleeve, and the tensioning part of each second prestressed tendon is connected to the sliding sleeve. The bottom surface of the steel-concrete bridge beam is fixed with several guide rings, which are used to provide constraints for the second prestressed tendons.

[0007] As a preferred embodiment of the present invention, the two vertical tensioning structures are respectively arranged on both sides of the steel-concrete bridge beam. Each vertical tensioning structure includes two anchoring components, which are respectively arranged at both ends of the steel-concrete bridge beam and are arranged along the length of the steel-concrete bridge beam. The vertical tensioning structure also includes a first prestressing tendon and a fixing frame. The two ends of the first prestressing tendon are respectively connected to the two anchoring components. The fixing frame is fixed at the middle position of the side of the steel-concrete bridge beam. A slidable bent tie rod is provided on the fixing frame. The bend of the bent tie rod hooks the middle of the first prestressing tendon. A tie bar is connected to the bent tie rod. The end of the tie bar away from the bent tie rod is connected to a sliding sleeve.

[0008] As a preferred embodiment of the present invention, each of the anchoring components includes a first anchoring plate and a second anchoring plate. A first lock is installed on the first anchoring plate, and a second lock is installed on the second anchoring plate. A fixing rod is fixed at both the upper and lower ends of the first anchoring plate, and a sliding seat is fixed at both the upper and lower ends of the second anchoring plate. The two sliding seats are respectively slidably sleeved on the two fixing rods. Each of the first and second locks is provided with a detachable mounting plate, and each mounting plate has a slot on its side.

[0009] As a preferred embodiment of the present invention, each of the transverse tensioning structures includes two pressure plates, which are respectively installed in two slots facing each other, and the two pressure plates are arranged along the width direction of the steel-concrete bridge beam. The pressure plates are connected to the horizontal part of the second prestressing tendon, and the pressure plates and the horizontal part are arranged perpendicular to each other.

[0010] As a preferred embodiment of the present invention, the load portion of the second prestressed tendon is in contact with the bottom surface of the steel-concrete bridge beam.

[0011] As a preferred embodiment of the present invention, the tensioning assembly further includes a mounting frame, which is fixed to the bottom surface of the steel-concrete bridge beam. A locking screw is fixed on the mounting frame, and the sliding sleeve is slidably sleeved on the locking screw. At least two locking nuts are threaded onto the locking screw to lock the position of the sliding sleeve together.

[0012] As a preferred embodiment of the present invention, a side box is provided on the side of the steel-concrete bridge beam, and a position monitoring component is provided inside the side box. The position monitoring component includes an opening and a side plate. A slidable feedback rod is provided in the opening. The side plate is fixed inside the side box. A rotating shaft is rotatably mounted on the side of the side plate. A swing plate is sleeved on the rotating shaft and connected to the side plate by a torsion spring. An outer cylinder is provided at the end of the swing plate away from the rotating shaft. A movable trajectory drawing pen is provided inside the outer cylinder and connected to the outer cylinder by a spring. A back plate is fixed inside the side box. Several sheets of paper are arranged on the side of the back plate and connected to the back plate by paper clips.

[0013] As a preferred embodiment of the present invention, in the initial state, the feedback rod abuts against the first lock, and the swing plate is in a vertical state.

[0014] As a preferred embodiment of the present invention, each of the paper surfaces is provided with a marking line, and each of the paper is provided with two distinct colored warning areas, the two warning areas being located at the two ends of the marking line respectively.

[0015] A construction method for prestressed reinforcement of bridge beam structures includes the following steps: Step 1: Anchoring component installation: Fix the first anchoring plate to both ends of the beam with chemical bolts. The second anchoring plate is not fixed yet, leaving room for sliding. Step 2, Arrangement of prestressing tendons: Pass both ends of the first prestressing tendon through the first locking device and fix it. Do not lock the second locking device yet, and keep it in a sliding state. Step 3, installation of transverse components: Install pressure plates on both sides of the beam, insert the second prestressing tendons, and form an X-shaped distribution by guide ring constraint; Step 4: Tensioning component construction: Fix the mounting frame at the bottom of the beam, install the sliding sleeve and connect the tie bar to the tensioning part of the second prestressing tendon; Step 5, Synchronous Tensioning Construction: Use hydraulic equipment to press down the sliding sleeve to simultaneously complete the prestressing loading of the vertical tensioning structure and the horizontal tensioning components.

[0016] The present invention has the following beneficial effects: 1. The X-shaped distribution of the second prestressing tendon forms a spatial oblique tension system, which forms a three-dimensional prestressing coupling effect with the vertical tension. The X-shaped inclined part decomposes the oblique tension into a transverse component perpendicular to the beam axis, which together with the vertical constraint force generated by the vertical tension forms a spatial force network, effectively limiting the transverse deformation and torsional effect of the beam. At the same time, the oblique prestress improves the internal stress distribution of the concrete, so that the beam maintains overall stability under the combined action of vertical and transverse loads. 2. When it is necessary to relocate the anchor points, the staff pulls the second anchor plate with a mechanical traction device. By utilizing the sliding fit between the second anchor plate and the second locking device, the entire system can complete the horizontal displacement while maintaining the prestressed tendons under continuous tension. This avoids the structural stress redistribution problem caused by unloading in traditional methods. After the second anchor plate reaches the new design position, a reliable connection with the base material is achieved through high-strength chemical bolts. This can maintain the prestressed tendons in a continuous and effective working state and avoid the performance degradation of the structure during loading and unloading cycles. 3. Construction workers only need to apply a downward thrust to the sliding sleeve using the tensioning component at one point to simultaneously achieve vertical tensioning of two first prestressed tendons and horizontal tensioning of four second prestressed tendons. There is no need to apply loads at multiple points separately, making the operation convenient and improving construction efficiency. 4. In the position monitoring component, the rotating shaft is located near the feedback rod, so that the swing of the swing plate forms a lever principle. The tiny positional change of the anchor plate input by the feedback rod can be amplified by the trajectory drawing pen and finally form direct feedback on the paper, so that the tiny displacement of the anchor plate can also be monitored. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the prestressed reinforcement bridge beam structure proposed in this invention; Figure 2 for Figure 1 Enlarged view of the structure at point A; Figure 3 for Figure 1 Enlarged view of the structure at point B; Figure 4 This is a structural schematic diagram of the lateral tensioning assembly; Figure 5 This is a partial structural diagram of a steel-concrete bridge beam. Figure 6 This is a structural schematic diagram of the anchoring component; Figure 7 This is a structural schematic diagram of the side box and anchoring components; Figure 8 This is a schematic diagram of the internal structure of the side box; Figure 9 This is a diagram showing the motion trajectory of the oscillating plate; Figure 10 This is a cross-sectional structural diagram of the side box.

[0018] In the diagram: 1. Reinforced concrete bridge beam; 21. First anchor plate; 211. Fixing rod; 22. First locking device; 23. Second anchor plate; 231. Sliding seat; 24. Second locking device; 25. First prestressing tendon; 26. Fixing frame; 27. Elbow tie rod; 28. Tie bar; 31. Mounting plate; 32. Slot; 33. Pressure plate; 34. Second prestressing tendon; 34a. Horizontal section; 34b1. Load-bearing section; 34 b2, Tensioning section; 34b, Inclined section; 41, Mounting bracket; 42, Locking screw; 43, Locking nut; 44, Sliding sleeve; 5, Guide ring; 61, Side box; 611, Opening; 62, Feedback rod; 63, Side plate; 64, Rotating shaft; 65, Swing plate; 651, Torsion spring; 661, Outer cylinder; 662, Trajectory drawing pen; 663, Spring; 67, Back plate; 68, Paper; 681, Marking line. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figure 1-10 The prestressed bridge beam structure includes a reinforced concrete bridge beam 1. Vertical tensioning components and horizontal tensioning components are installed on the reinforced concrete bridge beam 1. Each vertical tensioning component consists of two vertical tensioning structures, which are respectively arranged on both sides of the reinforced concrete bridge beam 1. Each vertical tensioning structure includes two anchoring components, which are respectively arranged at both ends of the reinforced concrete bridge beam 1. The two anchoring components are arranged along the length of the reinforced concrete bridge beam 1. Each anchoring component includes a first anchoring plate 21 and a second anchoring plate 23. The first anchoring plate 21 is equipped with a first anchoring plate 21 and a second anchoring plate 23. A lock 22 is provided, and a second lock 24 is installed on the second anchor plate 23. The upper and lower ends of the first anchor plate 21 are fixed with fixing rods 211, and the upper and lower ends of the second anchor plate 23 are fixed with sliding seats 231. The two sliding seats 231 are respectively slidably sleeved on the two fixing rods 211. By setting the two fixing rods 211 and the two sliding seats 231, the first anchor plate 21 and the second anchor plate 23 can move relative to each other. When the second anchor plate 23 moves relative to the first anchor plate 21, the two fixing rods 211 and the two sliding seats 231 provide guidance for it.

[0021] The vertical tensioning structure also includes a first prestressing tendon 25 and a fixing frame 26. Both ends of the first prestressing tendon 25 are connected to two anchoring components. The fixing frame 26 is fixed to the middle of the side of the reinforced concrete bridge beam 1. A slidable bent tie rod 27 is installed on the fixing frame 26. The bend of the bent tie rod 27 hooks onto the middle of the first prestressing tendon 25. Tie bars 28 are connected to the bent tie rod 27. Figure 1As shown, at the middle position of the first prestressing tendon 25, a tension force is applied to the first prestressing tendon 25 through the elbow tie rod 27, so that it generates a prestress effect, thereby causing the beam to produce an upward precamber, thus offsetting part of the deformation under the load. The vertical tensioning structure can improve the stress distribution of the beam, reduce the shear force at the beam end, and improve the crack resistance and load-bearing capacity of the beam.

[0022] Each of the first lock 22 and the second lock 24 is provided with a detachable mounting plate 31. Each mounting plate 31 has a slot 32 on its side. The lateral tensioning assembly consists of two lateral tensioning structures, each including two pressure plates 33. The two pressure plates 33 are respectively installed in two opposite slots 32, and are arranged along the width direction of the reinforced concrete bridge beam 1. Second prestressing tendons 34 are connected to the sides of both pressure plates 33. Several guide rings 5 ​​are fixed to the bottom surface of the reinforced concrete bridge beam 1. The guide rings 5 ​​provide constraints for the second prestressing tendons 34, thereby changing the direction of the tension in the second prestressing tendons 34. Figure 5 As shown, for any one of the second prestressing tendons 34, under the action of the guide ring 5, the second prestressing tendon 34 is divided into a horizontal part 34a and an inclined part 34b. The horizontal part 34a is perpendicular to the pressure plate 33. For the transverse tensioning structure, when the two second prestressing tendons are tensioned, the two horizontal parts 34a can apply tension to the two pressure plates 33, making the two pressure plates 33 tend to move closer to each other. In this case, the long-term stability of the anchoring node is enhanced by transverse prestressing, which effectively extends the service life of the anchoring components under complex load environments.

[0023] Furthermore, for the four second prestressing tendons 34 in the transverse tensioning assembly, the four inclined portions 34b together form an X-shaped distribution, forming as shown in the figure. Figure 4 In the state shown, the four second prestressing tendons 34 together provide lateral tension to the steel-concrete bridge beam 1. In summary, the four second prestressing tendons 34 of the lateral tensioning assembly in this invention form a spatial oblique tension system in an X-shape, creating a three-dimensional prestressing coupling effect with the vertical tension. The X-shaped inclined portion 34b decomposes the oblique tension into a lateral component perpendicular to the beam axis, which, together with the vertical constraint force generated by the vertical tension, constitutes a spatial force network. This effectively limits the lateral deformation and torsional effect of the beam, and also, through the oblique tension... Prestressing improves the internal stress distribution of concrete, enabling the beam to maintain overall stability under the combined action of vertical and lateral loads. At the same time, the X-shaped arrangement allows the four second prestressing tendons 34 to form a self-balancing system, avoiding additional bending moments on the steel-concrete bridge beam 1. Furthermore, the superposition of oblique and vertical tensions enhances the structure's resistance to overturning. This prestressed reinforcement structure is particularly suitable for complex stress scenarios such as curved bridges and skew bridges, and can significantly improve the structural safety and durability of bridges under dynamic loads such as earthquakes, wind loads, and vehicle eccentric loads.

[0024] like Figure 3 As shown, in the initial state, the first anchor plate 21 is fixed to the steel-concrete bridge beam 1 by several chemical bolts. The two ends of the first prestressing tendon 25 pass through two first locking devices 22 and two second locking devices 24 respectively. The workers fix the two ends of the first prestressing tendon 25 to the two first locking devices 22 respectively, while keeping the two second locking devices 24 in a relatively sliding relationship with the first prestressing tendon 25 (i.e., the first prestressing tendon 25 is not fixed by the second locking devices 24). In this case, the two first anchor plates 21 respectively fix the two ends of the first prestressing tendon 25. In the application of the prestressed reinforcement structure proposed in this invention, after long-term use, the anchor components are prone to deterioration of the contact state with the substrate and expansion of interface damage due to the interaction of multiple factors such as material creep, corrosion aging, construction defects, load accumulation, thermal expansion and contraction caused by temperature changes, and biological erosion, which in turn lead to loosening and a decrease in anchoring force. In the prior art, the workers need to reinstall the anchor plates, and the first prestressing tendon 25 needs to be removed during reinstallation. The load on the first prestressing tendon 25 is adjusted, and the installation position is reselected. After installation, the load is applied to the first prestressing tendon 25 again. However, for the prestressed reinforcement device proposed in this invention, in the initial state, the first anchor plate 21 is rigidly connected to the concrete beam through chemical bolts. At the same time, a sliding second locking device 24 is set to form a non-constrained contact with the first prestressing tendon 25. This design allows the first anchor plate 21 to independently undertake the end anchoring function of the prestressing tendon, while the second locking device 24 is only used as a transition component for position adjustment. When it is necessary to move the anchor point, the workers pull the second anchor plate 23 through a mechanical traction device. By utilizing its sliding cooperation with the second locking device 24, the entire system can complete the horizontal displacement while maintaining the continuous tension of the prestressing tendon. This avoids the structural stress redistribution problem caused by unloading in traditional methods. After the second anchor plate 23 reaches the new design position, a reliable connection with the substrate is achieved through high-strength chemical bolts. Through this design, the prestressing tendon can be kept in a continuous and effective working state, avoiding the performance degradation of the structure during loading and unloading cycles.

[0025] like Figure 2As shown, the inclined portion 34b of the second prestressing tendon 34 is further divided into a load portion 34b1 and a tensioning portion 34b2. The load portion 34b1 is in contact with the bottom surface of the reinforced concrete bridge beam 1 and is used for prestressing reinforcement of the reinforced concrete bridge beam 1. A tensioning assembly is provided on the bottom surface of the reinforced concrete bridge beam 1 to apply tension to the first prestressing tendon 25 and the second prestressing tendon 34. The tensioning assembly includes a mounting frame 41, which is fixed to the bottom surface of the reinforced concrete bridge beam 1. A locking screw 42 is fixed on the mounting frame 41, and a sliding sleeve 44 is slidably fitted on the locking screw 42. The end of each tensioning portion 34b2 is connected to the sliding sleeve 44. At least two locking nuts 43 are threaded onto the locking screw 42. Figure 2 As shown, after arranging the two first prestressing tendons 25 and the four second prestressing tendons 34, the construction workers connect the end of the second prestressing tendon 34 away from the pressure plate 33 (i.e., the tensioning part 34b2) to the sliding sleeve 44. At the same time, the ends of the two tie bars 28 away from the corresponding elbow tie rods 27 are also connected to the sliding sleeve 44. Then, the construction workers use hydraulic cylinders and other equipment to apply a downward thrust to the sliding sleeve 44. When the sliding sleeve 44 descends, it can pull the two tie bars 28 and the four second prestressing tendons 34, pre-tensioning the two tie bars 28 and the four second prestressing tendons 34. At this time, the two tie bars 28 The two elbow tie rods 27 will be pulled respectively, so that the two elbow tie rods 27 apply tension to the middle position of the two first prestressing tendons 25, thereby realizing the vertical tension of the two first prestressing tendons 25. At the same time, the horizontal part 34a of the second prestressing tendon can apply a tie rod to the pressure plate 33, so that the pressure plate 33 presses tightly against the anchor plate, thereby improving the connection strength between the anchor plate and the steel-concrete bridge beam 1. Meanwhile, the load parts 34b1 of the four second prestressing tendons 34 together form an X-shaped transverse tension. In summary, the construction personnel only need to apply prestressing load at one point, without having to apply load at multiple points separately, making the operation convenient.

[0026] The bridge prestressed reinforcement structure proposed in this invention also has a position detection function for the anchor plate, such as... Figure 8 , 9 As shown in Figure 10, after arranging the prestressed reinforcement structure, the construction workers install a side box 61 on the side of the steel-concrete bridge beam 1 and adjust the position of the feedback rod 62 so that the feedback rod 62 abuts against the first locking device 22. A position monitoring component is installed inside the side box 61. The position monitoring component includes an opening 611 and a side plate 63. A slidable feedback rod 62 is installed in the opening 611. The side plate 63 is fixed inside the side box 61. A rotating shaft 64 is rotatably installed on the side of the side plate 63. A swing plate 65 is sleeved on the rotating shaft 64, and the swing plate 65 is connected to the side plate 63 by a torsion spring 651. Figure 8 and 9As shown, under the elastic force of the torsion spring 651, the swing plate 65 always tends to swing towards point L. The feedback rod 62 is set directly opposite the swing plate 65. When the feedback rod 62 abuts against the first lock 22, the swing plate 65 just maintains a vertical position. An outer cylinder 661 is set at the end of the swing plate 65 away from the rotating shaft 64. A movable trajectory drawing pen 662 is set inside the outer cylinder 661, and the trajectory drawing pen 662 is connected to the outer cylinder 661 by a spring 663. A back plate 67 is fixed inside the side box 61. Several papers 68 are arranged on the side of the back plate 67, and the papers 68 are connected to the back plate 67 by paper clips. Each paper 68 has a marking line 681 on its surface. Under the elastic force of the spring 663, the tip of the trajectory drawing pen 662 always tends to press against the paper 68.

[0027] When the first anchor plate 21 vibrates or shifts, it will move away from or closer to the side box 61. Under the action of the torsion spring 651, the feedback rod 62 remains pressed against the first lock 22. Therefore, the displacement of the anchor plate can be transmitted to the swing rod through the feedback rod 62, causing the swing plate 65 to swing. During the swinging process, the trajectory drawing pen 662 can draw arc-shaped line segments on the surface of the paper 68. The greater the displacement amplitude of the anchor plate, the wider the line segment drawn by the trajectory drawing pen 662; conversely, the smaller the displacement amplitude of the anchor plate, the narrower the line segment drawn by the trajectory drawing pen 662. Therefore, construction personnel can periodically check the paper 68 to determine the degree of displacement of the anchor plate within a certain time interval, facilitating the reinforcement or re-fixation of anchor plates with decreased connection strength. Figure 9 As shown, each sheet of paper 68 has two distinct colored warning areas, namely... Figure 9 The shaded areas indicate that when the drawing trajectory extends into these two warning areas, it means that the positional deviation of the anchor plate has exceeded the controllable range and needs to be dealt with immediately. This design makes the feedback of information more intuitive.

[0028] It is worth noting that, such as Figure 9 As shown, the pivot 64 is located near the feedback rod 62, which makes the swing of the swing plate 65 form a lever principle. The tiny positional change of the anchor plate input by the feedback rod 62 can be amplified by the trajectory drawing pen 662 and finally form direct feedback on the paper 68. This design allows the tiny displacement of the anchor plate to be monitored. In addition, this monitoring method does not require electricity or electronic devices such as sensors, making it suitable for long-term use in harsh outdoor environments. It should also be noted that the anchor plate mentioned above includes the first anchor plate 21 and the second anchor plate 23.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A prestressed reinforced bridge beam structure, characterized in that, The bridge includes a steel-concrete bridge beam (1), on which a vertical tensioning assembly and a horizontal tensioning assembly are provided. The vertical tensioning assembly consists of two vertical tensioning structures, each of which includes a first prestressing tendon (25). The horizontal tensioning assembly consists of two horizontal tensioning structures, each of which includes a second prestressing tendon (34). The second prestressing tendon (34) consists of a horizontal part (34a) and an inclined part (34b). The inclined part (34b) consists of a load part (34b1) and a tensioning part (34b2). The four load parts (34b1) together form an X-shaped distribution. The bottom surface of the steel-concrete bridge beam (1) is provided with a tensioning assembly for applying tension to the first prestressed tendon (25) and the second prestressed tendon (34). The tensioning assembly includes a sliding sleeve (44), and the tensioning part (34b2) of each second prestressed tendon (34) is connected to the sliding sleeve (44). The bottom surface of the steel-concrete bridge beam (1) is fixed with several guide rings (5), which are used to provide constraints for the second prestressed tendons (34).

2. The prestressed reinforced bridge beam structure according to claim 1, characterized in that, Two vertical tensioning structures are respectively arranged on both sides of the steel-concrete bridge beam (1). Each vertical tensioning structure includes two anchoring components. The two anchoring components are respectively arranged at both ends of the steel-concrete bridge beam (1). The two anchoring components are arranged along the length direction of the steel-concrete bridge beam (1). The vertical tensioning structure also includes a first prestressing tendon (25) and a fixing frame (26). The two ends of the first prestressing tendon (25) are respectively connected to the two anchoring components. The fixing frame (26) is fixed at the middle position of the side of the steel-concrete bridge beam (1). A sliding elbow tie rod (27) is provided on the fixing frame (26). The elbow position of the elbow tie rod (27) hooks the middle of the first prestressing tendon (25). A tie rod (28) is connected to the elbow tie rod (27). The end of the tie rod (28) away from the elbow tie rod (27) is connected to the sliding sleeve (44).

3. The prestressed reinforced bridge beam structure according to claim 2, characterized in that, Each of the anchoring components includes a first anchoring plate (21) and a second anchoring plate (23). A first lock (22) is installed on the first anchoring plate (21), and a second lock (24) is installed on the second anchoring plate (23). A fixing rod (211) is fixed at both the upper and lower ends of the first anchoring plate (21), and a sliding seat (231) is fixed at both the upper and lower ends of the second anchoring plate (23). The two sliding seats (231) are respectively slidably sleeved on the two fixing rods (211). Each of the first lock (22) and the second lock (24) is provided with a detachable mounting plate (31), and each mounting plate (31) has a slot (32) on its side.

4. The prestressed reinforced bridge beam structure according to claim 3, characterized in that, Each of the transverse tensioning structures includes two pressure plates (33), which are respectively installed in two slots (32) facing each other, and the two pressure plates (33) are arranged along the width direction of the steel-concrete bridge beam (1). The pressure plates (33) are connected to the horizontal part (34a) of the second prestressing tendon (34), and the pressure plates (33) and the horizontal part (34a) are arranged perpendicular to each other.

5. The prestressed reinforced bridge beam structure according to claim 1, characterized in that, The load portion (34b1) of the second prestressed tendon (34) is in contact with the bottom surface of the steel-concrete bridge beam (1).

6. The prestressed reinforced bridge beam structure according to claim 1, characterized in that, The tensioning assembly also includes a mounting frame (41), which is fixed to the bottom surface of the steel-concrete bridge beam (1). A locking screw (42) is fixed on the mounting frame (41), and a sliding sleeve (44) is slidably sleeved on the locking screw (42). At least two locking nuts (43) are threaded onto the locking screw (42) to lock the position of the sliding sleeve (44) together.

7. The prestressed reinforced bridge beam structure according to claim 1, characterized in that, A side box (61) is provided on the side of the steel-concrete bridge beam (1). A position monitoring component is provided inside the side box (61). The position monitoring component includes an opening (611) and a side plate (63). A slidable feedback rod (62) is provided in the opening (611). The side plate (63) is fixed inside the side box (61). A rotating shaft (64) is rotatably installed on the side of the side plate (63). A swing plate (65) is sleeved on the rotating shaft (64). The swing plate (65) and the side plate (63) are connected. The two are connected by a torsion spring (651). The swing plate (65) is provided with an outer cylinder (661) at the end away from the rotating shaft (64). The outer cylinder (661) is provided with a movable trajectory drawing pen (662), and the trajectory drawing pen (662) is connected to the outer cylinder (661) by a spring (663). The side box (61) is fixed with a back plate (67). Several papers (68) are arranged on the side of the back plate (67), and the several papers (68) are connected to the back plate (67) by paper clips.

8. The prestressed reinforced bridge beam structure according to claim 7, characterized in that, In the initial state, the feedback rod (62) abuts against the first lock (22), and the swing plate (65) is in a vertical state.

9. The prestressed reinforced bridge beam structure according to claim 7, characterized in that, Each of the paper sheets (68) has a marking line (681) on its surface and two different colored warning areas on each of the paper sheets (68), with the two warning areas located at the two ends of the marking line (681).

10. A construction method for prestressed reinforced bridge beam structure, based on the prestressed reinforced bridge beam structure as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1, Installation of anchoring components: Fix the first anchoring plate (21) to both ends of the beam with chemical bolts. The second anchoring plate (23) is not fixed for the time being, leaving room for sliding. Step 2, Arrangement of prestressing tendons: The two ends of the first prestressing tendon (25) are passed through the first locking device (22) and fixed. The second locking device (24) is not locked temporarily and is kept in a sliding state. Step 3, installation of transverse components: Install pressure plates (33) on both sides of the beam, insert the second prestressing tendons (34), and constrain them with guide rings (5) to form an X-shaped distribution; Step 4, tensioning component construction: Fix the mounting frame (41) at the bottom of the beam, install the sliding sleeve (44) and connect the tie bar (28) to the tensioning part (34b2) of the second prestressing tendon (34); Step 5, Synchronous tensioning construction: Use hydraulic equipment to press down the sliding sleeve (44) to simultaneously complete the prestressing loading of the vertical tensioning structure and the horizontal tensioning components.

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