Concrete continuous beam widening structure and process with transverse prestress

Abstract

The invention discloses a concrete continuous beam widening structure with transverse prestress and a process, and relates to the technical field of bridge reconstruction and expansion, the concrete continuous beam widening structure comprises a newly-widened bridge body assembly and a transverse prestress connector, and a wet joint structure is arranged on the side, in butt joint with an old bridge body assembly, of the newly-widened bridge body assembly. And a plurality of transverse prestressed reinforcements are correspondingly arranged in the middles of the main beam top plates of the newly widened bridge body assembly and the old bridge body assembly. The transverse prestressed connectors are arranged at the splicing positions of the new flange plate and the old flange plate of the old bridge body assembly and the new broadened bridge body assembly, the multiple new bridge transverse prestressed steel bars are arranged in the middle of the main beam of the new broadened bridge body assembly, and prestress is generated through tensioning; and the newly broadened bridge body assembly beam body and the old bridge body assembly beam body are stressed together through a transverse prestress connector and a wet joint structure. Crack development of concrete is effectively controlled by applying transverse prestress, and the structural durability is improved. The new beam body and the old beam body are stressed together, so that structural diseases caused by differential settlement are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge reconstruction and expansion, in particular to a widened concrete continuous beam structure and process with transverse prestress Background Art

[0002] The cast-in-situ continuous box girder of concrete with transverse prestress is the most common bridge type for large-span bridges encountered in highway reconstruction and expansion projects. Its transverse splicing scheme has always been a technical problem that troubles us and is a research hotspot.

[0003] In highway reconstruction and expansion projects, for the widening scheme of this type of bridge, the general method is to utilize the old bridge and build a new bridge separately. This scheme requires a large amount of land and high cost. A small number of projects adopt the longitudinal expansion joint splicing scheme, which is prone to damage of the expansion joint and has potential safety hazards.

[0004] Therefore, there is an urgent need to design a widened structure of a transverse prestressed concrete continuous beam to provide reliable and stable technical support for the widening and reconstruction of highway bridges, so as to enhance the integrity and mechanical properties of the bridge and reduce the cost of bridge reconstruction and expansion. Summary of the Invention

[0005] In order to solve the above technical problems of the widened structure of the transverse prestressed concrete continuous beam, the present invention provides a widened concrete continuous beam structure and process with transverse prestress. The following technical solutions are adopted:

[0006] A widened concrete continuous beam structure with transverse prestress, the concrete continuous beam widened structure includes a newly widened bridge body assembly and a transverse prestress connector. A wet joint structure is arranged on one side of the newly widened bridge body assembly where it is butted against the old bridge body assembly. Multiple new bridge transverse prestressed steel bars are arranged in the middle of the main beam of the newly widened bridge body assembly. One ends of the multiple new bridge transverse prestressed steel bars are respectively fixed at the outer ends of the newly widened bridge body assembly, and the other ends respectively pass through the wet joint structure and expose the ends of the wet joint structure. The transverse prestress connector includes a connector box body, multiple left prestressed steel bar butt-joint structures, multiple right prestressed steel bar butt-joint structures and multiple prestress application devices. Docking structure movable grooves are respectively arranged on both sides of the connector box body. The multiple left prestressed steel bar butt-joint structures and the multiple right prestressed steel bar butt-joint structures are respectively clamped in the docking structure movable grooves on both sides of the connector box body. The two ends of the prestress application device are connected to the left prestressed steel bar butt-joint structure and the right prestressed steel bar butt-joint structure, and the distance between the left prestressed steel bar butt-joint structure and the right prestressed steel bar butt-joint structure is adjusted. The multiple left prestressed steel bar butt-joint structures are respectively butted against the multiple new bridge transverse prestressed steel bars of the newly widened bridge body assembly, and the multiple right prestressed steel bar butt-joint structures are respectively butted against the multiple old bridge transverse prestressed steel bars of the old bridge body assembly.

[0007] By adopting the above technical solutions, a transverse prestress connector is provided at the joint of the new and old flange plates of the old bridge body assembly and the newly widened bridge body assembly, so that the new and old transverse prestressed steel bars are connected into a whole.

[0008] A plurality of new bridge transverse prestressed steel bars are arranged in the middle of the main beam of the newly widened bridge body assembly. Prestress is generated by tensioning, and through the transverse prestress connector and the wet joint structure, the beam body of the newly widened bridge body assembly and the beam body of the old bridge body assembly are closely combined to jointly bear the load.

[0009] The beam body of the newly widened bridge body assembly and the beam body of the old bridge body assembly form a continuous structural system, increasing the coordination of the new and old structures to reduce the impact and vibration caused by vehicle driving.

[0010] The new and old beam bodies are usually spliced by a wet joint structure, and the new and old concretes are connected by means of a post-cast strip to form a whole.

[0011] Low cost, land saving, the bridge width is about 60 - 65% of that of a newly built separated bridge, small project scale, and less land use.

[0012] The transverse prestress makes the new and old beam bodies closely combined, improving the integrity and stability of the structure.

[0013] The application of prestress can effectively control the development of concrete cracks and improve the durability of the structure.

[0014] The new and old beam bodies jointly bear the load, reducing the structural diseases caused by uneven settlement.

[0015] Optionally, a detachable connector cover plate is provided on the top of the connector box body.

[0016] By adopting the above technical solutions, the connector cover plate can form a rigid surface after concrete pouring in the connector box body and is integrated with the new and old bridge decks.

[0017] Optionally, the left prestressed steel bar docking structure includes a boss clamping sleeve part and a clamping part. The clamping part is provided with an internal thread for adjusting the distance between the left prestressed steel bar docking structure and the right prestressed steel bar docking structure. The boss clamping sleeve part and the clamping part are integrally formed. After the new bridge transverse prestressed steel bar is sleeved in the boss clamping sleeve part, extrusion connection is carried out;

[0018] The structure of the right prestressed steel bar docking structure is the same as that of the left prestressed steel bar docking structure.

[0019] By adopting the above technical solution, both the left prestressed steel bar butt-joint structure and the right prestressed steel bar butt-joint structure adopt the sleeve press-fitting structure form to effectively connect multiple new bridge transverse prestressed steel bars and multiple old bridge transverse prestressed steel bars of the newly widened bridge assembly and the old bridge assembly, and the internal structure form with internal threads provides a connection and adjustment structure for the prestress application device.

[0020] Optionally, the boss-inserted sleeve part is provided with a threaded weld seam. After the extrusion connection is completed, welding reinforcement is carried out at the connection end and the threaded weld seam.

[0021] By adopting the above technical solution, after the extrusion connection is completed, welding is carried out through the threaded weld seam on the boss-inserted sleeve part. The welding form can be arc welding, gas shielded welding, etc. Appropriate welding materials can be selected according to the specific steel grades of the new bridge transverse prestressed steel bars and the old bridge transverse prestressed steel bars for full welding, which can improve the reliability of the butt joint.

[0022] Optionally, the prestress application device includes a left threaded section, an adjustment section and a right threaded section. The left threaded section and the right threaded section are respectively connected to both ends of the adjustment section. The left threaded section is screwed into the internal thread of the clamping part of the left prestressed steel bar butt-joint structure, and the right threaded section is screwed into the internal thread of the clamping part of the right prestressed steel bar butt-joint structure. When the adjustment section is screwed, the distance between the left prestressed steel bar butt-joint structure and the right prestressed steel bar butt-joint structure is adjusted, and prestress is applied when the distance becomes smaller.

[0023] By adopting the above technical solution, the left threaded section, the adjustment section and the right threaded section of the prestress application device are integrally formed of steel materials, and the thread directions of the left threaded section and the right threaded section are the same. When the adjustment section is screwed, the distance between the left prestressed steel bar butt-joint structure and the right prestressed steel bar butt-joint structure becomes larger or smaller. When the distance becomes smaller, prestress is applied. The application of prestress can be determined according to the prestress magnitude of multiple old bridge transverse prestressed steel bars of the old bridge assembly.

[0024] Optionally, the wet joint structure includes a groove body and a groove body sealing plate. One end of the groove body is connected to the main beam end of the newly widened bridge assembly, and the left side of the connector box body of the transverse prestress connector is connected to the other end of the groove body. After the transverse prestress connector is connected, the groove body is filled with concrete, and after the concrete filling is completed, the groove body sealing plate is installed on the top of the groove body.

[0025] By adopting the above technical solution, the wet joint structure adopts a groove body with a top docking opening, and the groove body sealing plate is installed on the top of the groove body after the concrete filling is completed, and the structure is more stable and reliable.

[0026] Optionally, after the transverse prestressed connector completes the connection and prestress application, the connector box is filled with concrete, and the connector cover plate is installed on the top of the connector box. The connector cover plate, the trough cover plate, the top surface of the newly widened bridge assembly, and the top surface of the old bridge assembly are flush.

[0027] The widening process of the concrete continuous beam with transverse prestress is to widen the old bridge assembly by using the widening structure of the concrete continuous beam with transverse prestress, including the following steps:

[0028] Step 1: According to the widening requirements and the dimensions, reinforcement, and layout of multiple old bridge transverse prestressed steel bars of the old bridge assembly, design the dimensions, reinforcement, and layout of multiple new bridge transverse prestressed steel bars of the newly widened bridge assembly. The positions of the multiple new bridge transverse prestressed steel bars correspond to the multiple old bridge transverse prestressed steel bars of the old bridge assembly;

[0029] Step 2: Carry out maintenance and reinforcement on the old bridge assembly, transform the flange at the splicing end, open slots to add temporary fixtures, and remove the anchors of the old bridge assembly;

[0030] Step 3: Respectively install the bosses of multiple left-side prestressed steel bar docking structures into the sleeve parts, sleeve multiple new bridge transverse prestressed steel bars, and then carry out extrusion connection;

[0031] Use the same method to carry out extrusion connection between multiple right-side prestressed steel bar docking structures and multiple old bridge transverse prestressed steel bars;

[0032] Step 4: Respectively rotate and screw the adjustment sections of multiple prestress application devices to complete the spacing adjustment and prestress application between the left-side prestressed steel bar docking structure and the right-side prestressed steel bar docking structure, and remove the temporary fixtures;

[0033] Step 5: Pour concrete into the trough body of the wet joint structure. After the concrete pouring is completed, install the trough cover plate on the top of the trough body;

[0034] Pour concrete into the connector box. After the concrete pouring is completed, install the connector cover plate on the top of the connector box to ensure that the connector cover plate, the trough cover plate, the top surface of the newly widened bridge assembly, and the top surface of the old bridge assembly are flush to form the newly widened bridge deck.

[0035] Optionally, in Step 2, open slots at a position 25 cm - 30 cm away from the anchor of the widened wing flange to set temporary fixtures; the temporary fixtures are used to ensure that the prestress does not lose when removing the anchor on the widened side of the old bridge and setting the transverse prestressed connector at the splicing end.

[0036] Optionally, the temporary fixture includes a bridge body clamping part and multiple steel bar connecting parts. The bridge body clamping part is installed at the slot opening of the old bridge assembly, and both ends of the multiple steel bar connecting parts are respectively connected to the bridge body clamping part, and the middle part clamps multiple old bridge transverse prestressed steel bars of the old bridge assembly.

[0037] By adopting the above technical solution, the form of the steel bar connector can be a structure form of sleeve pressing. It is only necessary to clamp multiple old bridge transverse prestressed steel bars of the old bridge body assembly and expose a connection end greater than 100 mm to ensure that no prestress loss occurs when the anchor is removed and the connector is set at the splicing end.

[0038] In summary, the present invention includes at least one of the following beneficial technical effects:

[0039] The present invention can provide a concrete continuous beam widening structure and process for setting transverse prestress. A transverse prestress connector is provided at the splicing joint of the new and old flange plates of the old bridge body assembly and the newly widened bridge body assembly, so that the new and old transverse prestressed steel bars are connected into a whole. A plurality of new bridge transverse prestressed steel bars are arranged in the middle of the main beam of the newly widened bridge body assembly, prestress is generated by tensioning, and through the transverse prestress connector and the wet joint structure, the beam body of the newly widened bridge body assembly and the beam body of the old bridge body assembly are closely combined and jointly stressed. The beam body of the newly widened bridge body assembly and the beam body of the old bridge body assembly form a continuous structural system, increasing the coordination of the new and old structures to reduce the impact and vibration caused by vehicle driving. The new and old beam bodies are usually spliced by a wet joint structure, and the new and old concretes are connected by a post-cast strip to form a whole. It has low cost, saves land, the bridge width is about 60-65% of that of a newly built separated bridge, the project scale is small, and the land use is economical. The transverse prestress makes the new and old beam bodies closely combined, improving the integrity and stability of the structure. The application of prestress can effectively control the development of concrete cracks and improve the durability of the structure. The new and old beam bodies jointly bear the force, reducing the structural diseases caused by uneven settlement. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a structural schematic diagram of the concrete continuous beam widening structure with transverse prestress provided by the present invention for docking the newly widened bridge body assembly and the old bridge body assembly;

[0041] Figure 2 is a cross-sectional structural schematic diagram of the two ends of the transverse prestress connector of the present invention connecting the new bridge transverse prestressed steel bar and the old bridge transverse prestressed steel bar;

[0042] Figure 3 is a cross-sectional structural schematic diagram of the butt joint structure of the left prestressed steel bar of the transverse prestress connector of the present invention;

[0043] Figure 4 is a side view structural schematic diagram of the combined state of the connector box body of the transverse prestress connector of the present invention and the butt joint structure of the left prestressed steel bar;

[0044] Figure 5 is a structural schematic diagram of the wet joint structure of the present invention;

[0045] Figure 6It is a schematic structural diagram of the state of adding a temporary fixture by grooving the flange of the old bridge body assembly of the present invention.

[0046] Description of reference numerals: 1. Newly widened bridge body assembly; 11. Wet joint structure; 111. Groove body; 112. Groove body sealing plate; 12. New bridge transverse prestressed steel bars; 2. Transverse prestress connector; 21. Connector box body; 211. Docking structure movable groove; 212. Connector sealing plate; 22. Left prestressed steel bar docking structure; 221. Boss clamping sleeve part; 2211. Threaded welded seam; 222. Clamping part; 2221. Internal thread; 23. Right prestressed steel bar docking structure; 24. Prestress applying device; 241. Left threaded section; 242. Adjusting section; 243. Right threaded section; 3. Temporary fixture; 31. Bridge body clamping part; 32. Steel bar connecting part; 100. Old bridge body assembly; 101. Old bridge transverse prestressed steel bars. Detailed implementation manners

[0047] The present invention will be further described in detail below with reference to the accompanying drawings.

[0048] An embodiment of the present invention discloses a concrete continuous beam widening structure and process for setting transverse prestress.

[0049] Refer to Figure 1 - Figure 6 , Embodiment 1, a concrete continuous beam widening structure for setting transverse prestress, the concrete continuous beam widening structure includes a newly widened bridge body assembly 1 and a transverse prestress connector 2. A wet joint structure 11 is provided on one side of the newly widened bridge body assembly 1 that is docked with the old bridge body assembly 100. Multiple new bridge transverse prestressed steel bars 12 are arranged in the middle of the main beam of the newly widened bridge body assembly 1. One ends of the multiple new bridge transverse prestressed steel bars 12 are respectively fixed at the outer ends of the newly widened bridge body assembly 1, and the other ends respectively pass through the wet joint structure 11 and expose the ends of the wet joint structure 11. The transverse prestress connector 2 includes a connector box body 21, multiple left prestressed steel bar docking structures 22, multiple right prestressed steel bar docking structures 23, and multiple prestress applying devices 24. Docking structure movable grooves 211 are respectively provided on both sides of the connector box body 21. The multiple left prestressed steel bar docking structures 22 and the multiple right prestressed steel bar docking structures 23 are respectively clamped in the docking structure movable grooves 211 on both sides of the connector box body 21. The two ends of the prestress applying device 24 are connected to the left prestressed steel bar docking structure 22 and the right prestressed steel bar docking structure 23, and the distance between the left prestressed steel bar docking structure 22 and the right prestressed steel bar docking structure 23 is adjusted. The multiple left prestressed steel bar docking structures 22 are respectively docked with the multiple new bridge transverse prestressed steel bars 12 of the newly widened bridge body assembly 1, and the multiple right prestressed steel bar docking structures 23 are respectively docked with the multiple old bridge transverse prestressed steel bars 101 of the old bridge body assembly 100.

[0050] A transverse prestress connector 2 is provided at the joint of the old and new flange plates of the old bridge body assembly 100 and the newly widened bridge body assembly 1, so that the old and new transverse prestressed steel bars are connected into a whole.

[0051] A plurality of new bridge transverse prestressed steel bars 12 are provided in the middle of the main beam of the newly widened bridge body assembly 1. Prestress is generated by tensioning, and through the transverse prestress connector 2 and the wet joint structure 11, the beam body of the newly widened bridge body assembly 1 and the beam body of the old bridge body assembly 100 are closely combined and share the load together.

[0052] The beam body of the newly widened bridge body assembly 1 and the beam body of the old bridge body assembly 100 form a continuous structural system, increasing the coordination of the old and new structures to reduce the impact and vibration caused by vehicle driving.

[0053] The old and new beam bodies are usually spliced by a wet joint structure 11, and the old and new concretes are connected by means of a post-cast strip to form a whole.

[0054] Low cost, land saving, the bridge width is about 60 - 65% of that of a newly built separated bridge, small project scale, and less land use.

[0055] The transverse prestress makes the old and new beam bodies closely combined, improving the integrity and stability of the structure.

[0056] The application of prestress can effectively control the development of concrete cracks and improve the durability of the structure.

[0057] The old and new beam bodies share the load together, reducing the structural diseases caused by uneven settlement.

[0058] In Embodiment 2, a detachable connector cover plate 212 is provided on the top of the connector box body 21.

[0059] The connector cover plate 212 can form a rigid surface after the concrete pouring in the connector box body 21 and form an integral body with the old and new bridge decks.

[0060] In Embodiment 3, the left prestressed steel bar butt joint structure 22 includes a boss clamping sleeve part 221 and a clamping part 222. The clamping part 222 is provided with an internal thread 2221 for adjusting the distance between the left prestressed steel bar butt joint structure 22 and the right prestressed steel bar butt joint structure 23. The boss clamping sleeve part 221 and the clamping part 222 are integrally formed. After the new bridge transverse prestressed steel bar 12 is sleeved in the boss clamping sleeve part 221, extrusion connection is carried out;

[0061] The structure of the right prestressed steel bar butt joint structure 23 is the same as that of the left prestressed steel bar butt joint structure 22.

[0062] Both the left prestressed steel bar butt-joint structure 22 and the right prestressed steel bar butt-joint structure 23 adopt the structure form of sleeve press-fitting to complete the effective connection of multiple new bridge transverse prestressed steel bars 12 of the newly widened bridge assembly 1 and multiple old bridge transverse prestressed steel bars 101 of the old bridge assembly 100. The inner part adopts the structure form of internal threads to provide a connection and adjustment structure for the prestress application device 24.

[0063] Example 4, a threaded weld seam 2211 is provided on the convex platform clamping sleeve part 221. After the extrusion connection is completed, welding reinforcement is carried out at the connection end and the threaded weld seam 2211.

[0064] After the extrusion connection is completed, welding is carried out through the threaded weld seam 2211 on the convex platform clamping sleeve part 221. The welding form can be arc welding, gas shielded welding, etc. Appropriate welding materials can be selected for full welding according to the specific steel grades of the new bridge transverse prestressed steel bars 12 and the old bridge transverse prestressed steel bars 101, which can improve the reliability of the butt joint.

[0065] Example 5, the prestress application device 24 includes a left threaded section 241, an adjustment section 242, and a right threaded section 243. The left threaded section 241 and the right threaded section 243 are respectively connected to both ends of the adjustment section 242. The left threaded section 241 is screwed into the internal thread 2221 of the clamping part 222 of the left prestressed steel bar butt-joint structure 22, and the right threaded section 243 is screwed into the internal thread of the clamping part of the right prestressed steel bar butt-joint structure 23. When the adjustment section 242 is rotated, the distance between the left prestressed steel bar butt-joint structure 22 and the right prestressed steel bar butt-joint structure 23 is adjusted. When the distance becomes smaller, prestress is applied.

[0066] The left threaded section 241, the adjustment section 242, and the right threaded section 243 of the prestress application device 24 are integrally formed of steel material. The thread directions of the left threaded section 241 and the right threaded section 243 are the same. When the adjustment section 242 is rotated, the distance between the left prestressed steel bar butt-joint structure 22 and the right prestressed steel bar butt-joint structure 23 becomes larger or smaller. When the distance becomes smaller, prestress is applied. The application of prestress can be determined according to the prestress magnitude of multiple old bridge transverse prestressed steel bars 101 of the old bridge assembly 100.

[0067] Example 6, the wet joint structure 11 includes a groove body 111 and a groove body sealing plate 112. One end of the groove body 111 is connected to the main beam end of the newly widened bridge assembly 1, and the left side of the connector box body 21 of the transverse prestress connector 2 is connected to the other end of the groove body 111. After the transverse prestress connector 2 is connected, the groove body 111 is filled with concrete. After the concrete filling is completed, the groove body sealing plate 112 is installed on the top of the groove body 111.

[0068] The wet joint structure 11 adopts a trough body 111 with a top mating opening. After the concrete filling is completed, a trough body sealing plate 112 is installed on the top of the trough body 111, making the structure more stable and reliable.

[0069] In Example 7, after the transverse prestressed connector 2 completes the connection and prestress application, the connector box body 21 is filled with concrete, and a connector sealing plate 212 is installed on the top of the connector box body 21. The connector sealing plate 212, the trough body sealing plate 112, the top surface of the newly widened bridge body assembly 1, and the top surface of the old bridge body assembly 100 are flush.

[0070] In Example 8, a concrete continuous beam widening process with transverse prestress is set. The old bridge body assembly 100 is widened by using a concrete continuous beam widening structure with transverse prestress, including the following steps:

[0071] Step 1: According to the widening requirements and the dimensions, reinforcement, and arrangement of multiple old bridge transverse prestressed steel bars 101 of the old bridge body assembly 100, design the dimensions, reinforcement, and arrangement of multiple new bridge transverse prestressed steel bars 12 of the newly widened bridge body assembly 1. The positions of the multiple new bridge transverse prestressed steel bars 12 correspond to the multiple old bridge transverse prestressed steel bars 101 of the old bridge body assembly 100.

[0072] Step 2: Implement maintenance and reinforcement on the old bridge body assembly 100, transform the flange at the splicing end, open slots to add temporary fixtures 3, and remove the anchors of the old bridge body assembly 100.

[0073] Step 3: Respectively, fit the bosses of multiple left-side prestressed steel bar docking structures 22 into the sleeve parts 221, and then sleeve multiple new bridge transverse prestressed steel bars 12 and perform extrusion connection.

[0074] Use the same method to perform extrusion connection on multiple right-side prestressed steel bar docking structures 23 and multiple old bridge transverse prestressed steel bars 101.

[0075] Step 4: Respectively, rotate the adjustment sections 242 of multiple prestress application devices 24 to complete the spacing adjustment and prestress application between the left-side prestressed steel bar docking structure 22 and the right-side prestressed steel bar docking structure 23, and remove the temporary fixtures 3.

[0076] Step 5: Pour concrete into the trough body 111 of the wet joint structure 11. After the concrete pouring is completed, install a trough body sealing plate 112 on the top of the trough body 111.

[0077] Pour concrete into the connector box body 21. After the concrete pouring is completed, install a connector sealing plate 212 on the top of the connector box body 21 to ensure that the connector sealing plate 212, the trough body sealing plate 112, the top surface of the newly widened bridge body assembly 1, and the top surface of the old bridge body assembly 100 are flush to form a widened new bridge deck.

[0078] Example 9, in step 2, a temporary fixture 3 is arranged by grooving at a position 25 cm - 30 cm away from the spliced wide flange anchor; the temporary fixture 3 is used to ensure that no prestress loss occurs when the old bridge spliced wide side anchor is released and the transverse prestress connector 2 is set at the splicing end.

[0079] Example 10, the temporary fixture 3 includes a bridge body clamping member 31 and a plurality of steel bar connecting members 32. The bridge body clamping member 31 is installed at the grooved part of the old bridge body assembly 100. The two ends of the plurality of steel bar connecting members 32 are respectively connected to the bridge body clamping member 31, and the middle part clamps a plurality of old bridge transverse prestressed steel bars 101 of the old bridge body assembly 100.

[0080] The form of the steel bar connecting member 32 can be a structure form clamped by a sleeve. It is only necessary to clamp a plurality of old bridge transverse prestressed steel bars 101 of the old bridge body assembly 100 and expose a connecting end greater than 100 mm to ensure that no prestress loss occurs when the anchor is released and the connector is set at the splicing end.

[0081] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A transverse prestressed concrete continuous beam widening structure is provided, characterized in that: The concrete continuous beam widening structure comprises a new widened bridge assembly (1) and a transverse prestressed connector (2), wherein a wet joint structure (11) is arranged on one side where the new widened bridge assembly (1) is butted against an old bridge assembly (100), a plurality of new transverse prestressed steel bars (12) are arranged in the middle of the main beam of the new widened bridge assembly (1), one end of the plurality of new transverse prestressed steel bars (12) are respectively fixed to the outer end of the new widened bridge assembly (1), and the other ends respectively pass through the wet joint structure (11) and expose the end of the wet joint structure (11), the transverse prestressed connector (2) comprises a connector box (21), a plurality of left prestressed steel bar butt joint structures (22), a plurality of right prestressed steel bar butt joint structures (23) and a plurality of prestressed stress applying devices (24), and the two sides of the connector box (21) are respectively A butt joint structure movable groove (211) is provided, and a plurality of left prestressed steel bar butt joint structures (22) and a plurality of right prestressed steel bar butt joint structures (23) are respectively mounted in the butt joint structure movable grooves (211) on both sides of the connector box (21); the two ends of the prestressed steel bar butt joint structure (22) are connected to the left prestressed steel bar butt joint structure (22) and the right prestressed steel bar butt joint structure (23), and the spacing between the left prestressed steel bar butt joint structure (22) and the right prestressed steel bar butt joint structure (23) is adjusted; the plurality of left prestressed steel bar butt joint structures (22) are respectively connected to a plurality of new bridge transverse prestressed steel bars (12) of the newly widened bridge assembly (1), and the plurality of right prestressed steel bar butt joint structures (23) are respectively connected to a plurality of old bridge transverse prestressed steel bars (101) of the old bridge assembly (100).

2. The widening structure of a concrete continuous beam with transverse prestressing according to claim 1 is characterized in that: A detachable connector sealing plate (212) is provided on the top of the connector box (21).

3. The widening structure of a concrete continuous beam with transverse prestressing according to claim 2 is characterized in that: The left prestressed steel bar butt joint structure (22) comprises a boss clamping sleeve member (221) and a clamping portion (222); the clamping portion (222) is provided with an internal thread (2221) for adjusting the spacing between the left prestressed steel bar butt joint structure (22) and the right prestressed steel bar butt joint structure (23); the boss clamping sleeve member (221) and the clamping portion (222) are integrally formed; the transverse prestressed steel bars (12) of the new bridge are inserted into the boss clamping sleeve member (221) and then extruded and connected; The structure of the prestressed steel bar butt joint structure (23) on the right side is consistent with that of the prestressed steel bar butt joint structure (22) on the left side.

4. The widening structure of a concrete continuous beam with transverse prestressing according to claim 3 is characterized in that: A threaded welding seam (2211) is provided on the boss clamping sleeve member (221), and after the extrusion connection is completed, welding reinforcement is performed at the connection end and the threaded welding seam (2211).

5. The widening structure of a concrete continuous beam with transverse prestressing according to claim 4 is characterized in that: The prestressing force applying device (24) comprises a left threaded section (241), an adjusting section (242) and a right threaded section (243); the left threaded section (241) and the right threaded section (243) are respectively connected to two ends of the adjusting section (242); the left threaded section (241) is screwed into the internal thread (2221) of the clamping portion (222) of the left prestressed steel bar butt joint structure (22); the right threaded section (243) is screwed into the internal thread of the clamping portion of the right prestressed steel bar butt joint structure (23); when the adjusting section (242) is screwed, the spacing between the left prestressed steel bar butt joint structure (22) and the right prestressed steel bar butt joint structure (23) is adjusted; when the spacing becomes smaller, prestressing force is applied.

6. The widening structure of a concrete continuous beam with transverse prestressing according to claim 5, characterized in that: The wet joint structure (11) comprises a trough body (111) and a trough body cover plate (112); one end of the trough body (111) is connected to the end of the main beam of the newly widened bridge assembly (1); the left side of the connector box (21) of the transverse prestressed connector (2) is connected to the other end of the trough body (111); after the transverse prestressed connector (2) is connected, the trough body (111) is filled with concrete; after the concrete filling is completed, the trough body cover plate (112) is installed on the top of the trough body (111).

7. The widening structure of a concrete continuous beam with transverse prestressing according to claim 6, characterized in that: After the transverse prestressed connector (2) is connected and prestress is applied, the connector box (21) is filled with concrete, and the connector cover plate (212) is installed on the top of the connector box (21). The connector cover plate (212), the trough cover plate (112), the top surface of the newly widened bridge assembly (1) and the top surface of the old bridge assembly (100) are flush.

8. A process for widening a concrete continuous beam with transverse prestressing, characterized in that: The widening of the old bridge assembly (100) is performed using the transversely prestressed concrete continuous beam widening structure as described in claim 7, comprising the following steps: Step 1, designing the size, reinforcement and arrangement of multiple new bridge transverse prestressed steel bars (12) of the newly widened bridge assembly (1) according to the widening requirements and the size, reinforcement and arrangement of multiple old bridge transverse prestressed steel bars (101) of the old bridge assembly (100), wherein the positions of the multiple new bridge transverse prestressed steel bars (12) correspond to the multiple old bridge transverse prestressed steel bars (101) of the old bridge assembly (100); Step 2, repair and reinforce the old bridge assembly (100), modify the flange of the spliced ​​end, add a temporary clamp (3) by slotting, and remove the anchor of the old bridge assembly (100); Step 3, inserting a plurality of transverse prestressed steel bars (12) of the new bridge into the boss clamping sleeve members (221) of the plurality of left prestressed steel bar docking structures (22) and then extruding and connecting them; The same method is used to squeeze and connect a plurality of right-side prestressed steel bar butt joint structures (23) and a plurality of transverse prestressed steel bars (101) of the old bridge; Step 4, respectively screwing the adjustment sections (242) of the plurality of prestressing force applying devices (24) to complete the spacing adjustment between the left prestressing steel bar butt joint structure (22) and the right prestressing steel bar butt joint structure (23) to apply prestress, and removing the temporary clamp (3); Step 5, pouring concrete in the trough body (111) of the wet joint structure (11), and after the concrete pouring is completed, installing the trough body cover plate (112) on the top of the trough body (111); Concrete is poured in the connector box (21). After the concrete pouring is completed, the connector cover plate (212) is installed on the top of the connector box (21), ensuring that the connector cover plate (212), the trough cover plate (112), the top surface of the newly widened bridge body assembly (1) and the top surface of the old bridge body assembly (100) are flush to form a new widened bridge deck.

9. The process for widening a concrete continuous beam with transverse prestressing according to claim 8, characterized in that: In step 2, a temporary clamp (3) is provided at a position 25 cm to 30 cm away from the widening side flange anchor. The temporary clamp (3) is used to ensure that the prestress is not lost when the widening side anchor of the old bridge is released at the splicing end and the transverse prestress connector (2) is provided.

10. The process for widening a concrete continuous beam with transverse prestressing according to claim 9, characterized in that: The temporary fixture (3) comprises a bridge body clamping component (31) and a plurality of steel bar connectors (32), wherein the bridge body clamping component (31) is installed at a slotted portion of an old bridge body assembly (100), and the two ends of the plurality of steel bar connectors (32) are respectively connected to the bridge body clamping component (31), and the middle portion clamps a plurality of old bridge transverse prestressed steel bars (101) of the old bridge body assembly (100).

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