Segment bolted rigid frame bridge and construction method thereof

Abstract

The present invention discloses a segment-bolted rigid frame bridge, comprising a plurality of prefabricated main beam segments, piers, and prefabricated cross beams. Two adjacent prefabricated main beam segments are bolted together by prefabricated cross beams, and the piers are inserted into the prefabricated cross beams to form a hidden cross beam structure. By hiding the cap beam in the main beam structure, the building height is reduced and the aesthetics is improved. The hidden cross beam structure is made into a steel prefabricated part, which has a small lifting weight and is convenient for on-site construction. Slot holes are arranged inside the prefabricated cross beams, and cross beam shear connectors are arranged in the slot holes. The extended section of the pier column is inserted into the slot hole, and the rigid connection between the pier column and the cap beam is achieved through high-strength concrete slurry. The advantages of the system are utilized to reduce the steel consumption of the structure and save the construction cost. At the same time, a construction method is disclosed, in which the main manufacturing of the main beam structure is placed in the prefabrication plant, which is conducive to ensuring the quality of the project, is suitable for steel-concrete composite beams with larger spans, and is conducive to giving full play to the structural advantages of the steel-concrete composite beams, and has good technical and economic benefits and broad application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of bridges, and in particular to a segmentally bolted rigid frame bridge and a construction method thereof. Background Art

[0002] Traditional cast-in-place construction of urban bridges can easily lead to a sudden drop in the traffic capacity of the construction area, affecting the smooth and safe flow of roads. It also has the problems of large on-site workload, low construction efficiency, high overall energy consumption, and serious disturbance to residents. Prefabricated bridges can significantly speed up the construction progress, reduce interference with existing traffic, and be beneficial to environmental protection through industrialized manufacturing of components and assembly construction.

[0003] In prefabricated bridges, steel-concrete composite beams are easy to be designed as prefabricated components, and they give full play to the material advantages of steel and concrete, making them a highly competitive bridge structure. The commonly used design method for prefabricated steel-concrete composite continuous beams at this stage is to set the main beam as a longitudinal segmented component, and a high cap beam structure is required, which increases the structural height, increases the construction cost, and reduces the aesthetics. Summary of the invention

[0004] The object of the present invention is to provide a segment-bolted rigid frame bridge and a construction method thereof, so as to solve the problem of needing to set up a cap beam structure with a relatively large height.

[0005] The technical solution adopted to solve the above technical problems is: a segment-bolted rigid frame bridge, comprising:

[0006] A prefabricated main beam segment, the prefabricated main beam segment comprising a main beam top plate, a main beam bottom plate, a main beam web plate, a concrete plate and a plurality of top plate shear connectors, the concrete plate being arranged above the main beam top plate, the top plate shear connector being welded to the main beam top plate and connecting the concrete plate and the main beam top plate into a whole, and the main beam web plate being arranged between the main beam top plate and the main beam bottom plate;

[0007] A pier having an extension section disposed on top; and

[0008] The prefabricated cross beam comprises a cross beam top plate, a cross beam bottom plate, a cross beam web plate and a hole wall steel plate. The prefabricated cross beam is arranged above the pier column. The prefabricated cross beam is provided with a main beam extension section for connecting with the prefabricated end section and the prefabricated middle beam section to form a main beam structure. The cross beam bottom plate is provided with an opening. The hole wall steel plate is arranged between the cross beam web plates. A slot hole is formed between the hole wall steel plate and the cross beam web plate. The slot hole is located outside the cross section of the main beam web plate. The extension section is inserted into the A slot hole is provided inside the slot hole, a beam shear connector is provided on the top plate of the beam, a grouting hole is provided on the upper end of the pier, the steel plate is arranged transversely and inserted through the slot hole, and the prefabricated beam is connected to the pier by high-strength concrete slurry; the prefabricated main beam segment can be divided into a prefabricated end segment and a prefabricated middle beam segment, the main beam top plate and the beam top plate are bolted, the main beam web plate and the beam web plate are bolted, and the main beam bottom plate and the beam bottom plate are bolted;

[0009] The prefabricated end segment is divided into a prefabricated end segment a and a prefabricated end segment b, and the prefabricated center beam segment is divided into a prefabricated center beam segment a and a prefabricated center beam segment b, wherein the prefabricated end segment b and the prefabricated center beam segment a are connected to the prefabricated cross beam, the connection segments between the prefabricated end segment b and the prefabricated cross beam, and between the prefabricated center beam segment a and the prefabricated cross beam constitute a longitudinal connection segment a, and the prefabricated end segment a and the prefabricated end segment b, the prefabricated center beam segment a and the prefabricated center beam segment b constitute a longitudinal connection segment b;

[0010] The main beam top plates, main beam bottom plates and main beam web plates adjacent to each other between the longitudinal connecting sections b are butted against each other and fastened by bolts.

[0011] Beneficial effects: By hiding the cap beam in the main beam structure to form a hidden beam structure, the building height is reduced and the aesthetics is improved. The hidden beam structure is made into a steel prefabricated part with a small lifting weight and convenient on-site construction. Slots are set inside the prefabricated beams, and beam shear connectors are set inside the slots. The steel bars extending from the piers are inserted into the slots and the rigid connection between the piers and the cap beams is achieved through high-strength concrete slurry. The advantages of the system are used to reduce the amount of steel used in the structure and save construction costs. The transverse position of the pier is located between the main beams, avoiding the complex node design between the pier and the main beams and cross beams, and the layout is flexible, and the lateral position of the pier can be adjusted according to the actual situation on site. The prefabricated main beam segments are bolted to each other to avoid welding quality problems that may be caused by overhead welding of the bottom plate.

[0012] Furthermore, the pier is configured as a rectangular structure, and the length of the extending section should not be less than 1.2 times the length of the long side of the pier.

[0013] Furthermore, the pier is configured as a cylindrical structure, the extending section is configured as a circle or a rectangle, and its length should not be less than 1.2 times the diameter of the pier.

[0014] Furthermore, a support ear is arranged in the transverse direction of the pier column, a support is arranged above the support ear, and a support stiffening rib is arranged inside the prefabricated cross beam above the support.

[0015] Furthermore, the web plate of the main beam and the web plate of the cross beam are collectively referred to as the web plate, the bottom plate of the main beam and the bottom plate of the cross beam are collectively referred to as the bottom plate, and the top plate of the main beam and the top plate of the cross beam are collectively referred to as the top plate;

[0016] A first splicing plate is provided between the bottom plate and the web plate between adjacent segments and is fastened and connected by high-strength bolts; a second splicing plate is provided between the top plates between adjacent segments and is fastened and connected by high-strength bolts, the first splicing plate is an ordinary flat splicing plate, the second splicing plate includes a horizontal plate and a plurality of vertical plates, the high-strength bolts are penetrated through the top plate and the horizontal plate to connect the top plates between adjacent segments into a whole, transverse steel bars are penetrated through the vertical plates, so that the concrete plate within the range of the longitudinal connection section is connected to the top plate as a whole, and the connection of adjacent main beam structures is realized at the transverse connection section through the transverse connection section wet joint;

[0017] The bottom plate area of ​​the main beam structure located near the pier is provided with a bottom plate shear connector, and the bottom plate shear connector is covered with beam bottom concrete to form a concrete reinforcement layer.

[0018] Furthermore, a reserved section is provided on one side of the prefabricated end b segment close to the prefabricated cross beam.

[0019] Furthermore, small cross beams are arranged between the prefabricated main beam segments.

[0020] A construction method for a segment-bolted rigid frame bridge comprises the following steps:

[0021] S1, manufacturing prefabricated cross beams, prefabricated end a segments, prefabricated end b segments, prefabricated middle beam a segments, and prefabricated middle beam b segments;

[0022] S2, casting or hoisting the pier column, installing the support on the ear, hoisting the prefabricated beam, inserting the extended section of the pier column into the slot hole in the prefabricated beam, and connecting the steel plate that is horizontally arranged and inserted through the slot hole by pouring high-strength concrete slurry;

[0023] S3. Install temporary piers under the longitudinal connecting sections a and b, fix the sections with full bolts, and pour concrete at the bottom of the beam;

[0024] S4. Dismantle the above temporary piers;

[0025] S5, pouring the wet joints of the longitudinal connection section b and the wet joints of the transverse connection section;

[0026] S6. Cast the reserved section of the precast end b segment and the concrete layer on the top of the precast beam to form a wet joint in the negative bending moment area, and apply a certain weight if necessary;

[0027] S7. Construction of bridge deck and ancillary facilities.

[0028] Beneficial effects: Placing the main manufacturing of the main beam structure in the prefabrication plant is conducive to ensuring the quality of the project. It is suitable for steel-concrete composite beams with larger spans and is conducive to giving full play to the structural advantages of steel-concrete composite beams. It has good technical and economic benefits and broad application prospects.

[0029] Furthermore, in step S1, when making the prefabricated center beam b segment, a reaction frame is used to fix the beam tops at both ends of the prefabricated center beam segment b, a jack is set at the bottom of the prefabricated center beam b segment and a lifting force is applied. When the lifting force reaches a predetermined value, it is replaced by the bottom support of the mid-span beam, and then the concrete slab on the top is poured.

[0030] Furthermore, reinforcing ribs are provided on the bottom plate of the prefabricated center beam b segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0032] Figure 1 Segment segmentation diagram when the precast main beam segment is subdivided;

[0033] Figure 2 It is a side view of the slot hole;

[0034] Figure 3 This is a side view of the main beam;

[0035] Figure 4 It is a top view of the steel-concrete composite rigid frame system with segmental bolts and welding;

[0036] Figure 5 It is a schematic diagram of the cross section of the pier column;

[0037] Figure 6 It is a schematic diagram of the cross section at the small cross-section. DETAILED DESCRIPTION

[0038] Reference Figures 1 to 6 A segment-bolted rigid frame bridge comprises a plurality of prefabricated main beam segments 1, piers 3 and prefabricated cross beams 2. Two adjacent prefabricated main beam segments 1 are bolted together by the prefabricated cross beams 2. The piers 3 are inserted into the prefabricated cross beams 2 to form a hidden cross beam structure.

[0039] Specifically, the prefabricated main beam segment 1 includes a main beam top plate 11, a main beam bottom plate 13, a main beam web 12, a concrete slab 14 and a plurality of top plate shear connectors. The concrete slab 14 is arranged above the main beam top plate 11. The top plate shear connector is welded to the main beam top plate 11 and connects the concrete slab 14 and the main beam top plate 11 into a whole. The main beam web 12 is welded between the main beam top plate 11 and the main beam bottom plate 13. The materials of the main beam top plate 11, the main beam bottom plate 13 and the main beam web 12 are all steel beams.

[0040] An extension section 31 is arranged above the pier 3. The prefabricated cross beam 2 includes a cross beam top plate 21, a cross beam bottom plate 22, a cross beam web plate 23 and a hole wall steel plate 24. The prefabricated cross beam 2 is arranged above the pier 3. The prefabricated cross beam 2 is provided with a main beam extension section, which is used to connect with the prefabricated end segment 101 and the prefabricated middle beam segment 102 to form a main beam structure. The connection position is the longitudinal connection section. The adjacent main beam structures are connected through the transverse connection section to form a bridge span structure. The cross beam bottom plate 22 is provided with an opening, and the aperture of the opening is slightly larger than the diameter of the pier 3, so that the extension section 31 of the pier 3 can be inserted into the prefabricated cross beam 2. The hole wall steel plate 24 is arranged between the web plate 23 of the cross beam, and a slot is formed between the hole wall steel plate 24 and the web plate 23 of the cross beam. The slot is located outside the cross section of the web plate 12 of the main beam. A cross beam shear connector 26 is welded inside the slot. The insertion section 31 is inserted into the slot. The cross beam top plate 21 is provided with a grouting hole. The prefabricated cross beam 2 is connected to the pier 3 by high-strength concrete slurry. By arranging the insertion section 31 on the pier 3 and inserting the insertion section 31 into the slot, the cap beam is hidden in the main beam structure to form a hidden cross beam structure, which reduces the building height and improves the aesthetics. The hidden cross beam structure is made into a steel prefabricated part, which has a small lifting weight and is convenient for on-site construction.

[0041] A slot is arranged inside the prefabricated crossbeam 2, and a crossbeam shear connector 26 is arranged in the slot. A steel plate 27 is arranged at the upper end of the pier 3, and the steel plate 27 is arranged horizontally and inserted through the slot. The extension section 31 is inserted into the slot and the rigid connection between the pier 3 and the cap beam is achieved through high-strength concrete slurry. The advantages of the system are utilized to reduce the steel consumption of the structure and save construction costs.

[0042] The prefabricated main beam segment 1 can be divided into a prefabricated end segment 101 and a prefabricated middle beam segment 102 . The segments located at both ends of the bridge body are called prefabricated end segments 101 , and the remaining segments are called prefabricated middle beam segments 102 .

[0043] The main beam top plate 11 is bolted to the cross beam top plate 21, the main beam web plate 12 is bolted to the cross beam web plate 23, and the main beam bottom plate 13 is bolted to the cross beam bottom plate 22. The prefabricated main beam segments 1 are bolted to each other, thus avoiding welding quality problems that may be caused by overhead welding of the bottom plate.

[0044] Preferably, in order to adapt to the manufacture of bridges with longer spans, the prefabricated end segment 101 is divided into a prefabricated end segment a and a prefabricated end segment b. The prefabricated center beam segment 102 is divided into a prefabricated center beam segment a and a prefabricated center beam segment b. The prefabricated end segment b and the prefabricated center beam segment a are connected to the prefabricated cross beam 2, and the connection sections between the prefabricated end segment b and the prefabricated cross beam 2 and between the prefabricated center beam segment a and the prefabricated cross beam 2 constitute a longitudinal connection segment a, and the prefabricated end segment a and the prefabricated end segment b, the prefabricated center beam segment a and the prefabricated center beam segment b constitute a longitudinal connection segment b. The two main beam top plates 11 between the longitudinal connection segments b are butt-jointed and bolted, and the adjacent main beam bottom plates 13 and main beam web plates 12 between the longitudinal connection segments b are butt-jointed and bolted. The longitudinal connecting section b is cast in situ with wet joints 8 to form the longitudinal connecting section; and the transverse connecting section wet joints 4 are cast in situ between adjacent concrete slabs 14 to form the transverse connecting section.

[0045] Preferably, the pier 3 is configured as a rectangular structure, and the length of the extending section 31 should not be less than 1.2 times the length of the long side of the pier 3 .

[0046] Preferably, the pier 3 is configured as a cylindrical structure, and the extending section 31 is configured as a circle or a rectangle, and its length should not be less than 1.2 times the diameter of the pier 3 .

[0047] Preferably, the pier 3 is provided with a support ear 32 in the transverse direction, a support 33 is provided above the support ear 32, and the prefabricated cross beam 2 is provided with a support stiffening rib 25 above the support 33. This ensures local stability and transmits concentrated force, thereby improving the stability and torsional resistance of the prefabricated cross beam 2.

[0048] Continue to refer to Figure 3The main beam web 12 and the cross beam web 23 are collectively referred to as webs, the main beam bottom plate 13 and the cross beam bottom plate 22 are collectively referred to as bottom plates, and the main beam top plate 11 and the cross beam top plate 21 are collectively referred to as top plates. Specifically, a first splicing plate 71 is provided between the bottom plate and the web plate between adjacent segments and is fastened and connected by high-strength bolts 73; a second splicing plate is provided between the top plates between adjacent segments and is fastened and connected by high-strength bolts 73, the first splicing plate 71 is an ordinary flat splicing plate, the second splicing plate includes a horizontal plate 721 and a plurality of vertical plates 722, the high-strength bolts 73 are penetrated through the top plate and the horizontal plate 721 to connect the top plates between adjacent segments into a whole, the vertical plate 722 is penetrated with a transverse steel bar 723, so that the concrete plate within the longitudinal connection section is connected to the top plate as a whole, and the connection of adjacent main beam structures is realized at the transverse connection section through the transverse connection section wet joint 4; the bottom plate area of ​​the main beam structure near the pier 3 is provided with a bottom plate shear connector, and the bottom plate shear connector is covered with beam bottom concrete to form a concrete reinforcement layer. The main beam bottom plate 13 and the cross beam bottom plate 22 near the pier 3 are provided with a bottom plate shear connector to form a concrete reinforcement layer. The second splicing plate not only realizes the fastening between the top plates, but also connects the top plate and the concrete post-casting section into a whole, avoiding the setting of bolts at this position and simplifying the construction. When making the prefabricated segments, the prefabricated middle beam segment 102 is set as a pre-bent structure, which can fully utilize the compressive performance of concrete and reduce the amount of steel used for the prefabricated middle beam segment 102.

[0049] Preferably, when the segments are manufactured, a certain distance is left on the side of the prefabricated end b segment close to the prefabricated cross beam 2 without pouring concrete, which is called a reserved segment.

[0050] Preferably, in order to improve the structural stability and increase the area of ​​the compressed zone, the width of the top plate at both ends is set to be greater than the width in the middle. The top plates at both ends of the prefabricated main beam segment 1 are widened and appropriately thickened when necessary. A top plate shear connector is also provided above the widened area of ​​the top plate. A small crossbeam is provided between the prefabricated main beam segments 1. The top plate is widened and matched with the connecting plate, so that the compressed area of ​​the main beam structure is increased. After the connection is completed, the temporary pier 6 under the longitudinal connecting section can be removed, which greatly reduces the traffic interference to the road below. At the same time, the second bolt not only realizes the fastening between the bottom plate in the negative bending moment area and the top plate in the positive bending moment area, but also connects the top plate to the concrete post-cast section as a whole, avoiding the setting of bolts at this position and simplifying the construction.

[0051] A construction method for a segmentally bolted rigid frame bridge comprises the following steps:

[0052] S1. Make prefabricated cross beam 2, prefabricated end a segment, prefabricated end b segment, prefabricated middle beam a segment, prefabricated middle beam b segment.

[0053] S2, pour or hoist the pier 3, install the support 33 on the ear 32, hoist the prefabricated beam 2, insert the extension section 31 of the pier 3 into the slot in the prefabricated beam 2, and connect the steel plate that is horizontally arranged and inserted through the slot by pouring high-strength concrete slurry.

[0054] S3. Install temporary piers 6 below the longitudinal connecting sections a and b, fix the sections with full bolts, and pour concrete at the bottom of the beam.

[0055] S4. Dismantle the temporary pier 6 mentioned above.

[0056] S5, pouring the longitudinal connection section b wet joint 8 and the transverse connection section wet joint 4.

[0057] S6. Cast the reserved section of the precast end b segment and the top concrete layer of the precast cross beam 2 to form a wet joint 5 in the negative bending moment area, and apply a certain amount of weight when necessary.

[0058] S7. Construction of bridge deck and ancillary facilities.

[0059] Preferably, the prefabricated center beam segment 102 is configured as a pre-bent structure. Specifically, in step S1, when making the prefabricated center beam b segment, a reaction frame is used to fix the beam tops at both ends of the segment, a jack is set at the bottom of the prefabricated center beam b segment and a lifting force is applied. When the lifting force reaches a predetermined value, it is replaced by the bottom support of the mid-span beam, and then the concrete slab 14 on the top is poured.

[0060] Preferably, reinforcing ribs are provided on the bottom plate of the prefabricated center beam b segment.

[0061] The prefabricated main beam segment 1 meets the coordination of engineering building modulus, which is conducive to industrialized large-scale production. The width of the wet joint 4 of the transverse connecting section is adjustable, which is suitable for the application of variable width sections. The main manufacturing of the main beam structure is placed in the prefabrication plant, which is conducive to ensuring the quality of the project, suitable for steel-concrete composite beams with larger spans, and conducive to giving full play to the structural advantages of steel-concrete composite beams, with good technical and economic benefits and broad application prospects.

[0062] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this technical field without departing from the purpose of the present invention.

Claims

1. A segment-bolted rigid frame bridge, characterized in that: include: A prefabricated main beam segment, comprising a main beam top plate, a main beam bottom plate, a main beam web plate, a concrete plate and a plurality of top plate shear connectors, wherein the concrete plate is arranged above the main beam top plate, the top plate shear connectors are welded to the main beam top plate and connect the concrete plate and the main beam top plate into a whole, and the main beam web plate is arranged between the main beam top plate and the main beam bottom plate; A pier having an extension section disposed on top; and The prefabricated cross beam comprises a cross beam top plate, a cross beam bottom plate, a cross beam web plate and a hole wall steel plate. The prefabricated cross beam is arranged above the pier column. The prefabricated cross beam is provided with a main beam extension section for connecting with the prefabricated end segment and the prefabricated middle beam segment to form a main beam structure. The cross beam bottom plate is provided with an opening. The hole wall steel plate is arranged between the cross beam web plates. A slot hole is formed between the hole wall steel plate and the cross beam web plate. The slot hole is located outside the cross section of the main beam web plate. The extension section is inserted into the A slot hole is provided inside the slot hole with a beam shear connector, a grouting hole is provided on the top plate of the beam, a steel plate is provided on the upper end of the pier, the steel plate is arranged transversely and inserted through the slot hole, and the prefabricated beam is connected to the pier by high-strength concrete slurry; the prefabricated main beam segment is divided into a prefabricated end segment and a prefabricated middle beam segment, the main beam top plate and the cross beam top plate are bolted, the main beam web plate and the cross beam web plate are bolted, and the main beam bottom plate and the cross beam bottom plate are bolted; The prefabricated end segment is divided into a prefabricated end segment a and a prefabricated end segment b, and the prefabricated center beam segment is divided into a prefabricated center beam segment a and a prefabricated center beam segment b, wherein the prefabricated end segment b and the prefabricated center beam segment a are connected to the prefabricated cross beam, the connection segments between the prefabricated end segment b and the prefabricated cross beam, and between the prefabricated center beam segment a and the prefabricated cross beam constitute a longitudinal connection segment a, and the prefabricated end segment a and the prefabricated end segment b, the prefabricated center beam segment a and the prefabricated center beam segment b constitute a longitudinal connection segment b; The main beam top plate, main beam bottom plate and main beam web plate adjacent to each other between the longitudinal connecting sections b are butted against each other and fastened by bolts; A support ear is arranged in the transverse direction of the pier column, a support is arranged above the support ear, and a support stiffening rib is arranged inside the prefabricated cross beam above the support.

2. The segment-bolted rigid frame bridge according to claim 1, characterized in that: The pier is configured as a rectangular structure, and the length of the extending section should not be less than 1.2 times the length of the long side of the pier.

3. The segment-bolted rigid frame bridge according to claim 1, characterized in that: The pier is configured as a cylindrical structure, and the extending section is configured as a circle or a rectangle, and its length should not be less than 1.2 times the diameter of the pier.

4. The segment-bolted rigid frame bridge according to claim 1, characterized in that: The main beam web and the cross beam web are collectively referred to as webs, the main beam bottom plate and the cross beam bottom plate are collectively referred to as bottom plates, and the main beam top plate and the cross beam top plate are collectively referred to as top plates; A first splicing plate is provided between the bottom plate and the web plate between adjacent segments and is fastened and connected by high-strength bolts; a second splicing plate is provided between the top plates between adjacent segments and is fastened and connected by high-strength bolts, the first splicing plate is an ordinary flat splicing plate, the second splicing plate includes a horizontal plate and a plurality of vertical plates, the high-strength bolts are penetrated through the top plate and the horizontal plate to connect the top plates between adjacent segments into a whole, transverse steel bars are penetrated through the vertical plates, so that the concrete plate within the range of the longitudinal connection section is connected to the top plate as a whole, and the connection of adjacent main beam structures is realized at the transverse connection section through the transverse connection section wet joint; A bottom plate shear connector is provided in the bottom plate area of ​​the main beam structure near the pier column, and the bottom plate shear connector is covered with beam bottom concrete to form a concrete reinforcement layer.

5. A construction method for a segment-bolted rigid frame bridge according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, manufacturing prefabricated cross beams, prefabricated end a segments, prefabricated end b segments, prefabricated middle beam a segments, and prefabricated middle beam b segments; S2, casting or hoisting the pier column, installing the support on the ear, hoisting the prefabricated beam, inserting the extended section of the pier column into the slot hole in the prefabricated beam, and connecting the steel plate that is horizontally arranged and inserted through the slot hole by pouring high-strength concrete slurry; S3. Install temporary piers under the longitudinal connecting sections a and b, fix the sections with full bolts, and pour concrete at the bottom of the beam; S4. Dismantle the above temporary piers; S5, pouring the wet joints of the longitudinal connection section b and the wet joints of the transverse connection section; S6. Cast the reserved section of the precast end b segment and the concrete layer on the top of the precast beam to form a wet joint in the negative bending moment area, and apply a certain weight if necessary; S7. Construction of bridge deck and ancillary facilities.

6. The construction method of the segment bolted rigid frame bridge according to claim 5, characterized in that: In step S1, when making the prefabricated center beam b segment, a reaction frame is used to fix the beam tops at both ends of the prefabricated center beam segment b, a jack is set at the bottom of the prefabricated center beam b segment and a lifting force is applied. When the lifting force reaches a predetermined value, it is replaced by the bottom support of the mid-span beam, and then the concrete slab on the top is poured.

7. The construction method of the segment-bolted rigid frame bridge according to claim 6, characterized in that: A reinforcing rib is arranged on the bottom plate of the prefabricated center beam b segment.

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