An arched rigid frame bridge and its lateral rotation construction method

Abstract

An arched rigid frame bridge and its lateral rotation construction method are disclosed, relating to the technical field of arched rigid frame bridges. The technical solution adopted includes V-shaped rigid frame segments and pier foundations. The V-shaped rigid frame segments include side arch segments, central arch segments, and bridge deck beams. A bottom surface is provided on the side of the connection between the side arch segments and the central arch segments, away from the bridge deck beam, and a ball joint is provided at one end of the bottom surface. The pier foundations are provided with lateral slots corresponding to the side arch segments and the central arch segments, and fixed slots corresponding to the connection between the side arch segments and the central arch segments. A ball joint groove, rotatably connected to the ball joint, is also provided at the intersection of the lateral slots and the fixed slots. The connection between the side arch segments and the central arch segments is inserted into the fixed slot, and the ball joint is inserted into the ball joint groove and rotatably connected to the ball joint groove. This invention eliminates the need for temporary construction towers and supports during rotation construction, and also reduces the footprint of the pier foundation platform. Furthermore, the pier foundation structure is simple, and the construction difficulty is low, making it a promising application in the construction of small-span arch bridges.

Description

Technical Field

[0001] This invention relates to the field of arched rigid frame bridge technology, and in particular to an arched rigid frame bridge and its lateral rotation construction method. Background Technology

[0002] With the continuous development of science and technology, new techniques are constantly emerging in bridge construction without scaffolding, and bridge rotation construction is one of them. Bridge rotation construction refers to a construction method in which the bridge structure is fabricated (cast or spliced) in a position other than the design axis, and then rotated into place. It can transform work above obstacles into work on the shore or near the ground. Bridge rotation construction is suitable for special river channels that cross deep valleys and rapids, or where hoisting is difficult, and has the advantages of saving hoisting costs, safety, reliability, and good integrity. Recently, more and more bridges crossing railways and highways have begun to use the rotation construction method, which not only does not affect the normal transportation of railways or highways, but also saves a lot of timber or steel for scaffolding, and is safe, reliable, and reduces construction difficulty.

[0003] Based on the direction of bridge structure rotation, construction methods can be categorized into vertical rotation, horizontal rotation (also known as vertical and horizontal rotation, with horizontal rotation further divided into pier top and pier bottom rotation), and a combination of both. Horizontal rotation is the most widely used method. However, horizontal rotation involves complex pier foundations and significant weight, requiring specific ground conditions. Vertical rotation, on the other hand, necessitates the erection of tall temporary construction towers, resulting in higher costs, greater construction difficulty, and safety hazards associated with working at heights. Therefore, a method is needed that eliminates the need for temporary construction towers during the rotation of small-span bridges, while also being suitable for arch bridge rotation construction limited by ground conditions. Summary of the Invention

[0004] To address the problem that existing technical solutions lack construction methods that eliminate the need for tall temporary construction towers during the rotation construction of short-span bridges, this invention provides an arched rigid frame bridge and its lateral rotation construction method.

[0005] This invention provides the following technical solution: an arched rigid frame bridge, comprising:

[0006] The V-shaped rigid frame segment includes interconnected side arch segments, central arch segments, and bridge beams. The side arch segments and central arch segments are provided with a bottom surface on the side away from the bridge beams at the connection point, and a ball joint is provided at one end of the bottom surface.

[0007] The bridge pier foundation is provided with two side slots corresponding to the side arch section and the middle arch section respectively, and a fixed slot corresponding to the connection between the side arch section and the middle arch section. A ball joint slot that is rotatably connected to the ball joint is also provided at the intersection of the two side slots and the fixed slot.

[0008] The fixed groove is inserted at the connection between the side arch section and the middle arch section, and the ball joint is inserted into the ball joint groove and rotatably connected to the ball joint groove.

[0009] Preferably, the fixing groove is provided with the ball joint groove and the side-lying groove at both ends of the bridge in the transverse direction. The bottom surfaces of the left and right V-shaped rigid frame segments are inserted into the fixing groove. The ball joints of the left and right V-shaped rigid frame segments are respectively inserted into the two ball joint grooves, and the two ball joints are respectively located on the side of the left and right V-shaped rigid frame segments away from each other.

[0010] Preferably, the rigid frame bridge further includes a mid-span segment, a side-span main beam segment, and an abutment. The mid-span segment has the V-shaped rigid frame segment and the side-span main beam segment arranged sequentially at both ends in the longitudinal direction, and the abutment is arranged at the bottom of the side-span main beam segment.

[0011] Preferably, the center of the ball joint is located at the midpoint of the edge extending longitudinally along the bottom surface, and the diameter of the ball joint is the width of the edge extending longitudinally along the bottom surface.

[0012] Preferably, the depth of the ball joint groove is equal to the diameter of the ball joint, and the opening of the ball joint groove is circular with a diameter 10-20 cm larger than the diameter of the ball joint.

[0013] Preferably, the V-shaped rigid frame segment is cast from ultra-high performance concrete.

[0014] Preferably, a gap is provided between the connection between the side arch section and the middle arch section and the fixing groove, a steel mesh is provided inside the pier foundation, the steel bars of the steel mesh extend into the gap, and a reserved steel bar channel corresponding to the steel bars is provided at the connection between the side arch section and the middle arch section of the V-shaped rigid frame segment.

[0015] A lateral rotation construction method applied to an arched rigid frame bridge includes the following steps:

[0016] S1, pour the bridge pier foundation at the construction location, and reserve a fixing groove and two sets of side grooves and ball joint grooves on the top of the bridge pier foundation;

[0017] S2, prefabricated V-shaped rigid frame segments, and the ball joints of the two V-shaped rigid frame segments on the same pier foundation are respectively located on the side of the two V-shaped rigid frame segments away from each other.

[0018] S3, insert the ball joints of the left and right V-shaped rigid frame segments into the two ball joint slots respectively, and insert the side arch segments and the middle arch segments of the two V-shaped rigid frame segments into the two sets of side-lying slots respectively, so that the left and right V-shaped rigid frame segments lie on the pier foundation.

[0019] S4. Flip the two V-shaped rigid frame segments from their side-lying state to their vertical state, and then connect the bridge beams of the two V-shaped rigid frame segments.

[0020] Preferably, in step S1, the steel bars of the pier foundation steel mesh are extended into the fixing groove; in step S2, steel bar channels are reserved at the connection between the side arch section and the middle arch section; in step S4, after the V-shaped rigid frame segment is flipped to a vertical state, supplementary steel bars are installed in the fixing groove and the reserved steel bar channels, and the supplementary steel bars are connected to the steel bars of the pier foundation steel mesh. Then, concrete is poured in the fixing groove to complete the connection between the pier foundation and the V-shaped rigid frame segment.

[0021] Preferably, step S1 further includes the casting of the abutment; step S2 further includes the prefabrication of the side span main beam segment and the mid-span segment of the middle span; step S4 further includes the connection of the side span main beam segment and the mid-span segment of the middle span after flipping the V-shaped rigid frame segment to a vertical state.

[0022] The beneficial effects of this invention are as follows: By reserving side-lying grooves, fixing grooves, and ball joint grooves on the pier foundation, the V-shaped rigid frame segment is laid sideways on the pier foundation before rotation construction, and the V-shaped rigid frame segment is divided into left and right sections. Compared with the prior art, during rotation construction, there is no need to set up temporary construction towers required for rotation in conventional methods, nor temporary construction supports installed to overcome terrain obstacles. There is no need for high-altitude operations, effectively reducing safety hazards and construction costs caused by temporary construction towers and supports. It also does not require a large pier foundation abutment area, and the pier foundation structure is simple and easy to construct, showing good application prospects in the construction of small-span arch bridges. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an embodiment of the V-shaped rigid frame segment of the present invention.

[0024] Figure 2 This is a schematic diagram of one embodiment of the bridge pier foundation of the present invention.

[0025] Figure 3 This is a schematic diagram of an embodiment of the arched rigid frame bridge of the present invention.

[0026] Figure 4 This is an exploded view of an embodiment of the arched rigid frame bridge of the present invention.

[0027] Figure 5 This is a side-lying schematic diagram of one embodiment of the construction method of the present invention.

[0028] Figure 6 This is an upright schematic diagram of one embodiment of the construction method of the present invention.

[0029] Attached reference numerals: 10- V-shaped rigid frame segment, 11-side arch segment, 12-middle arch segment, 13-bridge beam, 14-bottom surface, 15-spherical hinge, 16-reserved rebar duct, 20-pier foundation, 21-side slot, 22-fixed slot, 23-spherical hinge slot, 30-mid-span segment of middle span, 40-side span main beam segment, 50-abutment. Detailed Implementation

[0030] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention. Example

[0031] This invention provides, for example Figure 1-2 The diagram illustrates an arched rigid frame bridge, suitable for small-span arch bridges, comprising a V-shaped rigid frame segment 10 and pier foundations 20. The V-shaped rigid frame segment 10 includes interconnected side arch segments 11, a central arch segment 12, and a bridge deck beam 13. The bridge deck beam 13 serves as the superstructure and bridge deck, supported by the side arch segments 11 and the central arch segment 12. A bottom surface 14 is provided on the side of the connection between the side arch segments 11 and the central arch segment 12, away from the bridge deck beam 13. The bottom surface 14 connects to the pier foundation 20, and a ball joint 15 is provided at one end of the bottom surface 14. The pier foundation 20 is provided with two side slots 21 corresponding to the side arch segments 11 and the central arch segment 12, and a fixing slot 22 corresponding to the connection between the side arch segments 11 and the central arch segment 12. A ball joint slot 23, rotatably connected to the ball joint 15, is also provided at the intersection of the two side slots 21 and the fixing slot 22. When the V-shaped rigid frame segment 10 is in a vertical state, the fixed groove 22 is inserted at the connection between the side arch segment 11 and the middle arch segment 12, and the ball joint 15 is inserted into the ball joint groove 23 and rotatably connected to the ball joint groove 23.

[0032] In construction environments with limited terrain and poor foundation conditions, conventional horizontal rotation methods are not feasible, while vertical rotation methods require the erection of tall temporary construction towers, resulting in higher costs and greater construction difficulty. This embodiment features a side-lying groove 21, a fixing groove 22, and a ball joint groove 23 at the top of the pier foundation 20. During construction, the pier foundation 20 is first poured at the construction location. Then, the prefabricated V-shaped rigid frame segment 10 is hoisted onto the pier foundation 20, with its side arch segment 11 and central arch segment 12 inserted into the pier foundation 20 and their corresponding side-lying grooves 21, respectively. Its ball joint 15 is inserted into the ball joint groove 23, allowing the V-shaped rigid frame segment 10 to lie sideways on the pier foundation 20 before rotation construction. Figure 5 As shown. During the rotation construction, the structure can be flipped from a side-lying state to a vertical state using the ball joint 15, and the connection between the side arch section 11 and the middle arch section 12 can be inserted into the fixing groove 22, as shown. Figure 6As shown. Compared with the horizontal and vertical rotation methods used in the prior art, the structure and rotation method provided in this embodiment eliminate the need for temporary construction towers and temporary construction supports required for terrain obstacles during rotation construction, thus eliminating the need for high-altitude operations, effectively reducing safety hazards and construction costs caused by temporary construction towers and supports; it also eliminates the need for a large pier foundation 20 abutment area, and the pier foundation 20 structure is simple, reducing construction difficulty and improving construction efficiency.

[0033] Furthermore, the fixing groove 22 is provided with ball joint grooves 23 and side-lying grooves 21 at both ends in the transverse direction of the bridge. The bottom surfaces 14 of the left and right V-shaped rigid frame segments 10 are inserted into the fixing grooves, and the ball joints 15 of the left and right V-shaped rigid frame segments 10 are respectively inserted into the two ball joint grooves 23, and the two ball joints 15 are respectively located on the side of the left and right V-shaped rigid frame segments 10 away from each other. The left and right V-shaped rigid frame segments 10 are flipped into a vertical state on the same pier foundation 20 and then spliced ​​into a whole. The difficulty and cost of rotation and construction are smaller. It has obvious advantages in the construction of small-span arch bridges with limited terrain and poor foundation conditions, and has good application prospects.

[0034] Preferably, the center of the ball joint 15 is located at the midpoint of the edge of the bottom surface 14 extending along the longitudinal direction of the bridge. The diameter of the ball joint 15 is the width of the edge of the bottom surface 14 extending along the longitudinal direction of the bridge. The ball joint 15 protrudes from the bottom surface 14 and the side surface at the connection of the side arch section 11 and the middle arch section 12, and can fully contact the ball joint groove 23 to complete the rotation process of the V-shaped rigid frame segment 10.

[0035] Preferably, the depth of the ball joint groove 23 is equal to the diameter of the ball joint 15, and the opening of the ball joint groove 23 is circular and its diameter is 10-20 cm larger than that of the ball joint 15 to avoid interference during rotation.

[0036] Preferably, the V-shaped rigid frame segment 10 is cast from ultra-high performance concrete (UHPC).

[0037] Preferably, a gap is provided between the connection between the side arch section 11 and the middle arch section 12 and the fixing groove 22. A steel mesh is provided inside the pier foundation 20, and the steel bars of the steel mesh extend into the gap. A reserved steel bar channel 16 corresponding to the steel bars is provided at the connection between the side arch section 11 and the middle arch section 12 of the V-shaped rigid frame segment 10. After the V-shaped rigid frame segment 10 is flipped to a vertical state, steel bars are added to the fixing groove 22 and the reserved steel bar channel 16, and the added steel bars are connected to the steel bars of the steel mesh of the pier foundation 20 that protrude from the side wall of the fixing groove 22. Then, UHPC is poured into the fixing groove 22 and the reserved steel bar channel 16 to complete the connection between the V-shaped rigid frame segment 10 and the pier foundation 20. Example

[0038] This invention provides, for example Figure 3-4 The diagram illustrates an arched rigid frame bridge. Based on Embodiment 1, the rigid frame bridge further includes a mid-span segment 30, side-span main beam segments 40, and abutments 50. The mid-span segment 30 has V-shaped rigid frame segments 10 and side-span main beam segments 40 sequentially arranged at both ends in the longitudinal direction. Abutments 50 are located at the bottom of the side-span main beam segments 40. The side arch segments 11 and central arch segments 12 of the V-shaped rigid frame segments 10, together with the mid-span segment 30, form the mid-span arched structure of this embodiment, and are connected to the abutments 50 at both ends via the side-span main beam segments 40. The mid-span segment 30 and side-span main beam segments 40 are prefabricated and, in this embodiment, can be collectively referred to as bridge decks along with the bridge deck beams 13. They are also divided into left and right sections to reduce construction difficulty. Example

[0039] A lateral rotation construction method for an arched rigid frame bridge as described in Example 2 includes the following steps:

[0040] S1. Excavate the foundation pit at the construction site and pour foundation piles in the foundation pit. Then, install the formwork of the pier foundation 20 around the foundation piles, tie the reinforcing bars, and reserve the fixing groove 22 and two sets of side grooves 21 and ball joint grooves 23 on the top of the pier foundation 20. The reinforcing bars of the steel mesh of the pier foundation 20 protrude out of the side formwork of the fixing groove 22 and extend into the fixing groove 22. Pour and cure the concrete.

[0041] Furthermore, at the construction site of abutment 50, a foundation pit was excavated, foundation piles were poured, formwork for abutment 50 was installed, steel bars were tied, concrete for abutment 50 was poured, and the concrete was cured.

[0042] S2. Prefabricate the formwork for the two V-shaped rigid frame segments 10 according to the component design drawings. Reserve steel reinforcement ducts 16 at the connection points of the side arch segment 11 and the central arch segment 12. Reserve wet joints and ring-shaped steel reinforcement on the sides of the bridge beams 13 of the two V-shaped rigid frame segments 10 facing each other, and at both ends of the bridge beams 13 in the longitudinal direction. The ball joints 15 of the two V-shaped rigid frame segments 10, installed on the same pier foundation 20, are respectively located on the sides of the two V-shaped rigid frame segments 10 furthest from each other. Assemble the formwork, tie the steel reinforcement, pour the UHPC, and steam cure to complete the prefabrication process at the factory or construction site.

[0043] Furthermore, in the factory or construction site, the prefabrication of the left and right side span main beam segments 40 and the middle span mid-span segment 30 is completed according to the component design drawings. Wet joints and ring reinforcement are reserved between the left and right side span main beam segments 40, between the left and right middle span mid-span segments 30, and at both ends of the longitudinal bridge direction of the side span main beam segments 40 and the middle span mid-span segment 30.

[0044] S3, as Figure 5As shown, the V-shaped rigid frame segment 10 is hoisted, and the ball joints 15 of the left and right V-shaped rigid frame segments 10 are respectively inserted into the two ball joint slots. The side arch segments 11 and the middle arch segments 12 of the two V-shaped rigid frame segments 10 are respectively inserted into the two sets of side-lying slots 21, so that the left and right V-shaped rigid frame segments 10 lie on the pier foundation 20.

[0045] S4, install cables on the left and right V-shaped rigid frame segments 10, and rotate the ball joint 15 in the ball joint groove 23 by tensioning the cables, inserting the connection between the side arch segment 11 and the middle arch segment 12 into the fixing groove 22, so that the left and right V-shaped rigid frame segments 10 are flipped from the side-lying state to the vertical state, as shown. Figure 6 As shown. Then, the supplementary reinforcing bars are installed in the fixing groove 22 and the reserved reinforcing bar channel 16, and the supplementary reinforcing bars are connected to the reinforcing bars of the pier foundation reinforcing mesh. Then, UHPC is poured in the fixing groove 22 to complete the connection between the pier foundation 20 and the V-shaped rigid frame segment 10.

[0046] Furthermore, the side span main beam segment 40 and the mid-span segment 30 are hoisted to the bridge design position, and the pre-reserved ring reinforcement bars of the adjacent bridge deck are connected by binding or welding. Finally, the wet joint UHPC is cast in place to complete the connection between the mid-span segment 30 and the V-shaped rigid frame segment 10, the V-shaped rigid frame segment 10 and the side span main beam segment 40, and the connection between the side span main beam segment 40 and the abutment 50.

[0047] Finally, the pre-reserved annular reinforcing bars between the bridge beams 13 of the two V-shaped rigid frame segments 10 on the left and right sides are connected by binding or welding, and the UHPC joint is re-wetted to complete the connection between the two V-shaped rigid frame segments 10 on the left and right sides. The main structure construction of the bridge is completed.

[0048] The above describes one or more embodiments of the present invention in a relatively specific and detailed manner, but it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An arch rigid frame bridge, characterized by, The application relates to a V-shaped rigid frame segment (10) comprising mutually connected side arch segments (11), middle arch segments (12) and bridge walkway beams (13), the connecting position of the side arch segments (11) and the middle arch segments (12) being provided with a bottom surface (14) away from one side of the bridge walkway beams (13), and the bottom surface (14) being provided with a spherical hinge (15) at one end; A bridge pier foundation (20) is provided with two side lying grooves (21) corresponding to the side arch segments (11) and the middle arch segments (12) respectively, and a fixed groove (22) corresponding to the connecting position of the side arch segments (11) and the middle arch segments (12), and the intersection of the two side lying grooves (21) and the fixed groove (22) is further provided with a spherical hinge groove (23) rotationally connected with the spherical hinge (15); The connecting position of the side arch segments (11) and the middle arch segments (12) is inserted into the fixed groove (22), the spherical hinge (15) is inserted into the spherical hinge groove (23) and rotationally connected with the spherical hinge groove (23). The fixed groove (22) is provided with the spherical hinge groove (23) and the side lying groove (21) at both ends in the transverse direction of the bridge, the bottom surfaces (14) of left and right V-shaped rigid frame segments (10) are inserted into the fixed groove, the spherical hinges (15) of the left and right V-shaped rigid frame segments (10) are respectively inserted into two spherical hinge grooves (23), and the two spherical hinges (15) are respectively arranged on the sides of the left and right V-shaped rigid frame segments (10) away from each other.

2. An arch rigid frame bridge according to claim 1, wherein The rigid frame bridge further comprises middle-span middle segments (30), side-span main beam segments (40) and abutments (50), the middle-span middle segments (30) are sequentially provided with the V-shaped rigid frame segments (10) and the side-span main beam segments (40) at both ends in the longitudinal direction of the bridge, and the bottom of the side-span main beam segments (40) is provided with the abutments (50).

3. An arch rigid frame bridge according to claim 2, wherein The spherical center of the spherical hinge (15) is located at the midpoint of the edge of the bottom surface (14) extending in the longitudinal direction of the bridge, and the diameter of the spherical hinge (15) is equal to the width of the edge of the bottom surface (14) extending in the longitudinal direction of the bridge.

4. An arch rigid frame bridge according to claim 1, wherein The depth of the spherical hinge groove (23) is equal to the diameter of the spherical hinge (15), the groove opening of the spherical hinge groove (23) is circular and the diameter is 10-20 cm larger than the diameter of the spherical hinge (15).

5. An arch rigid frame bridge according to claim 1, wherein The V-shaped rigid frame segment (10) is made of super high performance concrete.

6. An arch rigid frame bridge according to claim 1, wherein The connecting position of the side arch segments (11) and the middle arch segments (12) and the fixed groove (22) are provided with a gap, a steel mesh is arranged in the bridge pier foundation (20), the steel bars of the steel mesh extend into the gap, and the connecting position of the side arch segments (11) and the middle arch segments (12) of the V-shaped rigid frame segment (10) is provided with a reserved steel bar hole (16) corresponding to the steel bars.

7. An arch rigid frame bridge according to claim 1, wherein The application further discloses a construction method of the V-shaped rigid frame segment (10), which comprises the following steps:

8. A lateral rotation construction method applied to the arch rigid frame bridge according to any one of claims 1-7, characterized in that, S1, pouring the bridge pier foundation (20) at a construction position, and reserving the fixed groove (22) and two groups of side lying grooves (21) and spherical hinge grooves (23) on the top of the bridge pier foundation (20); ​ S2, prefabricate V-shaped rigid frame segment (10), and the spherical hinge (15) of the left and right V-shaped rigid frame segments (10) arranged on the same pier foundation (20) is arranged on the side away from each other of the left and right V-shaped rigid frame segments (10); S3, insert the spherical hinge (15) of the left and right V-shaped rigid frame segments (10) into the two spherical hinge grooves, and insert the side arch segment (11) and the middle arch segment (12) of the two V-shaped rigid frame segments (10) into the two groups of lateral lying grooves (21), so that the left and right V-shaped rigid frame segments (10) are laterally lying on the pier foundation (20); S4, turn the left and right V-shaped rigid frame segments (10) from the lateral lying state to the vertical state, and then connect the bridge deck beam (13) of the left and right V-shaped rigid frame segments (10).

9. A method of construction of a side turnabout according to claim 8 wherein, In step S1, the reinforcing steel bars of the reinforcing mesh of the pier foundation (20) are also extended into the fixed groove (22); in step S2, the reinforcing steel bar hole (16) is reserved at the connection of the side arch segment (11) and the middle arch segment (12); in step S4, after the V-shaped rigid frame segment (10) is turned to the vertical state, the post-reinforcing steel bars are installed in the fixed groove (22) and the reserved reinforcing steel bar hole (16), the post-reinforcing steel bars are connected with the reinforcing steel bars of the reinforcing mesh of the pier foundation, and then the concrete is poured in the fixed groove (22) to complete the connection of the pier foundation (20) and the V-shaped rigid frame segment (10).

10. A method in accordance with claim 8 wherein, In step S1, the pouring of the abutment (50) is also included; in step S2, the prefabrication of the side span main girder segment (40) and the midspan midspan segment (30) is also included; in step S4, after the V-shaped rigid frame segment (10) is turned to the vertical state, the connection of the side span main girder segment (40) and the midspan midspan segment (30) is performed. In step S1, the pouring of the abutment (50) is also included; in step S2, the prefabrication of the side span main girder segment (40) and the midspan midspan segment (30) is also included; in step S4, after the V-shaped rigid frame segment (10) is turned to the vertical state, the connection of the side span main girder segment (40) and the midspan midspan segment (30) is performed.

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