阅读说明：本技术 一种自复位装配式预制混凝土拱桥支撑 (Self-resetting assembly type precast concrete arch bridge support ) 是由 赵瑞芬 于 2020-08-11 设计创作，主要内容包括：一种自复位装配式预制混凝土拱桥支撑,包括至少两个拱梁组件和多个间隔搭设在拱梁组件之间的横梁,所述拱梁组件采用预制钢筋混凝土结构,包括多个中部预制段和设置在两端的端部预制段,各预制段之间通过预应力筋拉结,同时在各预制段的端部设置钢板护套。本发明提出的上述拱桥支撑结构,在地震或车辆等荷载作用下实现自复位,大大提高了施工效率和施工质量,抗震性能优越。(The utility model provides a from restoring to throne assembled precast concrete arch bridge and supporting, includes that two at least arched girder subassemblies and a plurality of intervals set up the crossbeam between the arched girder subassembly, the arched girder subassembly adopts prefabricated reinforced concrete structure, includes a plurality of middle part prefabricated sections and sets up the prefabricated section of tip at both ends, ties through the prestressing tendons between each prefabricated section, sets up the steel sheet sheath simultaneously at the tip of each prefabricated section. The arch bridge supporting structure provided by the invention realizes self-resetting under the load action of earthquake or vehicles and the like, greatly improves the construction efficiency and the construction quality, and has excellent anti-seismic performance.)

1. A self-resetting assembled precast concrete arch bridge support comprises at least two arch beam assemblies (1-1, 2-1) and a plurality of cross beams (3-1) which are erected between the arch beam assemblies at intervals, and is characterized in that: the arched girder assembly (1-1, 2-1) adopts a prefabricated reinforced concrete structure and comprises a plurality of middle prefabricated sections (1) and end prefabricated sections (2) arranged at two ends, wherein upper and lower rows of pore passages are respectively arranged in the middle prefabricated sections (1) and the end prefabricated sections (2) along the arch axial direction at the same height position in the radial direction of the arch, the middle prefabricated sections (1) and the end prefabricated arch sections (2) at two ends are connected in series in the arch axial direction, the upper and lower rows of pore passages between the end prefabricated sections (1) and the middle prefabricated sections (2) and between the adjacent middle prefabricated sections (2) are communicated with each other to form an arch upper row of prestressed rib through holes (8) and an arch lower row of prestressed rib through holes (8), and upper rows of prestressed ribs (4) and lower rows of prestressed ribs (5) are respectively arranged in the upper and lower rows of prestressed rib through holes (8); the middle prefabricated section (1) and the end prefabricated section (2) are respectively embedded with a plurality of first vertical sleeves (13) and a plurality of second vertical sleeves (23) at the positions where the cross beams (3-1) are arranged, and the cross beams (3-1) are locked and connected through fixing pieces (1-1-1) arranged in the first vertical sleeves (13) and the second vertical sleeves (23).

2. The self-resetting fabricated concrete arch bridge bracing according to claim 1, wherein: the middle prefabricated section (2) comprises a first end (11) and a second end (12), the end face of the first end (11) is a cylindrical semicircular convex face extending along the arch axial direction, and the end face of the second end (12) is a cylindrical semicircular concave face extending along the arch axial direction; prefabricated section of tip (2) includes third end (21) and fourth end (22), third end (21) are horizontal supporting seat, the terminal surface of fourth end (22) with second end (11) end face structure is the same, cylindricality semicircle convex surface with cylindricality semicircle concave surface looks adaptation.

3. The self-resetting fabricated concrete arch bridge bracing according to claim 2, wherein: the first end (11) and the second end (12) are respectively provided with a first steel plate sheath and a second steel plate sheath, and the first steel plate sheaths are formed by welding a first upper arch plate (117), a first lower arch plate (118) and two first side plates which are wrapped around the middle prefabricated section body and a first end plate (116) which is attached to the outer side of the cylindrical semicircular convex surface; the second steel plate sheath is formed by welding a second upper arch plate (127), a second lower arch plate (128), two second side plates and a second end plate (126) which are coated on the outer side of the cylindrical semicircular concave surface, wherein the second upper arch plate, the second lower arch plate and the two second side plates are coated on the periphery of the middle prefabricated section body; a first upper through hole (112) and a first lower through hole (111) are formed in the first end plate (116) at positions corresponding to the upper row of pore canals and the lower row of pore canals, and a second upper through hole (122) and a second lower through hole (121) are formed in the second end plate (126) at positions corresponding to the upper row of pore canals and the lower row of pore canals; the inner walls of the first steel plate sheath and the second steel plate sheath are respectively and uniformly provided with a first bolt pin (119) and a second bolt pin (129) which are anchored in the concrete.

4. The self-resetting fabricated concrete arch bridge bracing according to claim 2 or 3, wherein: the third end (21) and the fourth end (22) are respectively provided with a third steel plate sheath and a fourth steel plate sheath; the third steel plate sheath is formed by welding a peripheral wall plate completely covering the periphery of the horizontal supporting seat, a third upper arch plate (217) attached to a part of the end prefabricated section body, a third lower arch plate (218) and two third side plates; and the inner walls of the third steel plate sheath and the fourth steel plate sheath are respectively and uniformly provided with a third stud (219) and a fourth stud which are anchored in the concrete.

5. The self-resetting fabricated concrete arch bridge bracing according to claim 3, wherein: the upper surfaces of the first upper arch plate (117) and the second upper arch plate (127) are welded with a first upper clamping piece (113) and a second upper clamping piece (123); the lower surfaces of the first lower arch plate (118) and the second lower arch plate (128) are welded with a first lower clamping piece (114) and a second lower clamping piece (124).

6. The self-resetting fabricated concrete arch bridge bracing according to claim 4, wherein: the upper surface of the third upper arch plate (217) is welded with a third upper clamping piece (213), and the lower surface of the third lower arch plate (218) is welded with a third lower clamping piece (214).

7. The self-resetting fabricated concrete arch bridge bracing according to claim 4, wherein: a rubber layer (125) is compounded on the outer side of the second end plate; the fourth steel plate sheath has the same structure as the second steel plate sheath.

8. A self-resetting fabricated concrete arch bridge bracing according to any one of claims 6 to 7, wherein: the lower outer end surface of the horizontal supporting seat is an inclined surface, and the inclined surface is vertical to the direction of the prestress through hole (8); the third steel plate sheath is covered with an inclined wall plate (216) in the position of the inclined surface, a third upper through hole (212) and a third lower through hole (211) are arranged in the positions, corresponding to the upper row of the holes and the lower row of the holes, of the inclined wall plate (216), and the upper row of the prestressed ribs (4) and the lower row of the prestressed ribs (5) are directly anchored on the inclined wall plate (216) through the upper anchorage devices (6) and the lower anchorage devices (7).

9. A self-resetting fabricated concrete arch bridge bracing according to any one of claims 1 to 3, wherein: the upper and lower rows of the ducts are formed by upper and lower rows of arched tubes pre-embedded in concrete, the arched tubes of the middle prefabricated section are welded and fixed between the first steel plate sheath and the second steel plate sheath, and the arched tubes of the end prefabricated section are welded and fixed and supported between the third steel plate sheath and the fourth steel plate sheath.

10. A self-resetting fabricated concrete arch bridge bracing according to any one of claims 1 to 3, wherein: the fixing piece (1-1-1) is a split screw, and the lap joint surface of the cross beam (3-1) and the arched beam assembly is completely matched with the upper surface of the arched beam assembly.

Technical Field

The invention relates to the field of bridge structures, in particular to a self-resetting assembly type precast concrete arch bridge support.

Background

The arch bridge is a bridge with an arch as a main bearing component of the structure in a vertical plane, the section of an upper arch ring of the arch bridge is only subjected to axial pressure without bending moment and shearing force, and the arch bridge has the advantages of large spanning capacity, good durability, attractive appearance, simple structure, easiness in mastering and the like.

The arch bridge is the most common bridge type in China, has many types and large quantity, is the crown of various bridge types, particularly a highway bridge, and according to incomplete statistics, 7 percent of highway bridges in China are the arch bridges.

At present, arch bridges can be divided into stone arch bridges, concrete arch bridges and steel arch bridges according to different building materials. The stone arch bridge has the advantages of heavy self weight, limited spanning capability, more labor force for stone exploitation and river building processing, and longer construction period.

The concrete arch bridge needs on-site mould making, steel bar binding and concrete pouring, the construction period is long, the construction quality is difficult to guarantee, and the technical requirements on-site construction workers are very high. The steel arch bridge has complex structure, high requirement on the foundation, high manufacturing cost and high maintenance cost. In addition, the stone arch bridge and the concrete arch bridge have poor seismic performance and are usually irreversibly damaged under the action of seismic force.

In summary, based on the above-mentioned technical defects, an arch bridge structure with high construction speed, guaranteed quality and good earthquake resistance is urgently needed.

Disclosure of Invention

The invention aims to provide an assembled precast concrete arch bridge support capable of realizing a self-resetting function under the action of earthquake force or vehicle load and the like, and the assembled precast concrete arch bridge support has the advantages of excellent earthquake resistance, high construction speed, guaranteed quality and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

a self-resetting assembly type precast concrete arch bridge support comprises at least two arch beam assemblies and a plurality of cross beams which are erected among the arch beam assemblies at intervals;

the arched beam assembly is of a prefabricated reinforced concrete structure and comprises a plurality of middle prefabricated sections and end prefabricated sections arranged at two ends;

the middle prefabricated section and the end prefabricated sections are internally provided with an upper row of pore channels and a lower row of pore channels at the same height positions in the radial direction of the arch along the axial direction of the arch, and the plurality of middle prefabricated sections and the end prefabricated arch sections at two ends are connected in series in the axial direction of the arch;

the upper row and the lower row of pore passages between the end prefabricated section and the middle prefabricated section and between the adjacent middle prefabricated sections are communicated with each other to form an arched upper row and an arched lower row of prestressed tendon through holes, and an upper row of prestressed tendons and a lower row of prestressed tendons are respectively arranged in the upper row and the lower row of prestressed tendon through holes in a penetrating manner;

the middle prefabricated section and the end prefabricated section are respectively pre-embedded with a plurality of first vertical sleeves and a plurality of second vertical sleeves at the positions where the cross beam is arranged, and the cross beam is connected with the first vertical sleeves and the second vertical sleeves in a locking mode through fixing pieces arranged in the first vertical sleeves and the second vertical sleeves.

Preferably, the middle prefabricated section comprises a first end and a second end, the end surface of the first end is a cylindrical semicircular convex surface extending along the arch axial direction, and the end surface of the second end is a cylindrical semicircular concave surface extending along the arch axial direction;

the prefabricated section of tip includes third end and fourth end, the third end is horizontal supporting seat, the terminal surface of fourth end with second end face structure is the same, cylindricality semicircle convex surface with cylindricality semicircle concave surface looks adaptation.

Preferably, the first end and the second end are respectively provided with a first steel plate sheath and a second steel plate sheath;

the first steel plate sheath is formed by welding a first upper arch plate, a first lower arch plate, two first side plates and a first end plate, wherein the first upper arch plate, the first lower arch plate and the two first side plates are wrapped around the middle prefabricated section body, and the first end plate is attached to the outer side of the cylindrical semicircular convex surface;

the second steel plate sheath is formed by welding a second upper arch plate, a second lower arch plate, two second side plates and a second end plate, wherein the second upper arch plate, the second lower arch plate and the two second side plates are wrapped around the middle prefabricated section body, and the second end plate is attached to the outer side of the cylindrical semicircular concave surface;

a first upper through hole and a first lower through hole are formed in the first end plate at positions corresponding to the upper row of pore passages and the lower row of pore passages, and a second upper through hole and a second lower through hole are formed in the second end plate at positions corresponding to the upper row of pore passages and the lower row of pore passages;

the inner walls of the first steel plate sheath and the second steel plate sheath are respectively and uniformly provided with a first stud and a second stud which are anchored in the concrete.

Preferably, the third end and the fourth end are respectively provided with a third steel plate sheath and a fourth steel plate sheath;

the third steel plate sheath is formed by welding a peripheral wall plate completely covering the periphery of the horizontal supporting seat, a third upper arch plate attached to a part of the end prefabricated section body, a third lower arch plate and two third side plates;

and the inner walls of the third steel plate sheath and the fourth steel plate sheath are respectively and uniformly provided with a third stud and a fourth stud which are anchored in the concrete.

Preferably, the first upper clamping piece and the second upper clamping piece are welded on the upper surfaces of the first upper arch plate and the second upper arch plate;

and the lower surfaces of the first lower arch bar and the second lower arch bar are welded with a first lower clamping piece and a second lower clamping piece.

Preferably, a third upper clamping piece is welded on the upper surface of the third upper arch plate, and a third lower clamping piece is welded on the lower surface of the third lower arch plate.

Preferably, a rubber layer is compounded on the outer side of the second end plate; the fourth steel plate sheath has the same structure as the second steel plate sheath.

Preferably, the lower outer end surface of the horizontal supporting seat is an inclined surface, and the inclined surface is perpendicular to the prestress perforation direction;

an inclined wall plate is attached to the position of the inclined surface of the third steel plate sheath, and a third upper through hole and a third lower through hole are formed in the positions, corresponding to the upper row of pore channels and the lower row of pore channels, of the inclined wall plate;

and the upper row of prestressed tendons and the lower row of prestressed tendons are directly anchored on the inclined wall plate through the upper anchorage device and the lower anchorage device.

Preferably, the upper and lower rows of the pore passages are formed by upper and lower rows of arched tubes pre-embedded in concrete, and the arched tubes of the middle prefabricated section are welded and fixed between the first steel plate sheath and the second steel plate sheath;

and the arched pipes of the prefabricated sections at the ends are fixedly welded and supported between the third steel plate sheath and the fourth steel plate sheath.

Preferably, the fixing part is a counter-pull screw rod, and the overlapping surface of the cross beam and the arched beam assembly is completely matched with the upper surface of the arched beam assembly.

The invention can achieve the following technical effects:

(1) the arch bridge support is prefabricated in a factory and assembled on site, so that the construction period is greatly shortened, the factory is prefabricated uniformly, the component quality is effectively ensured, the site wet operation such as concrete pouring and the like is reduced, the energy is saved, the environment is protected, the cost is reduced, the length of the prefabricated section is greatly reduced, and the transportation and the hoisting are convenient.

(2) According to the invention, each prefabricated section is tied up through the upper row of prestressed tendons and the lower row of prestressed tendons, so that on one hand, the bearing capacity of the support is improved, and the arrangement of the tendons of the arched beam assembly can be properly reduced; on the other hand, under the action of loads such as earthquakes, vehicles and the like, even if the arched girder assembly slightly deforms, self-resetting can be achieved through the prestressed drawknot, and the service life is greatly prolonged.

(3) According to the invention, the structures of the cylindrical arc convex surface and the cylindrical arc concave surface which are matched with each other and arranged at the prefabricated section are easy to form an arch by self under the action of the prestressed tendons, so that the field assembly difficulty is greatly reduced; and meanwhile, the self-resetting after deformation is convenient.

(4) According to the invention, the first steel plate sheath, the second steel plate sheath, the third steel plate sheath and the fourth steel plate sheath are arranged at the two ends of the end prefabricated section and the middle prefabricated end, the steel plate sheaths enable the concrete at the end part to be in a three-dimensional constraint state, the concrete at the end part is effectively prevented from being crushed, the bearing capacity of the arched beam assembly is improved, and meanwhile, the steel plate sheaths can also serve as end part disassembly-free templates during factory prefabrication. In addition, through the arrangement of the rubber layer, the rubber layer can rub against the steel plate sheath to consume energy, and the anti-seismic or anti-vibration effect is improved.

(5) The clamping pieces are arranged on the upper arch plate and the lower arch plate of the first steel plate sheath, the second steel plate sheath, the third steel plate sheath and the fourth steel plate sheath, so that the clamping pieces are convenient for prefabricating clamping side molds in a factory on one hand, and can be used as hoisting points for hoisting on site on the other hand, and the two purposes are achieved at one stroke.

(6) The arch pipe is used for forming the prestressed tendon through holes on one hand, and can be used as a tie bar of a steel plate sheath on the other hand, so that the arch pipe is convenient to prefabricate in a factory; the first vertical sleeve and the second vertical sleeve can also be used as tie bars of the side die.

(7) The lower outer end face of the horizontal supporting seat is provided with the inclined face perpendicular to the prestress through hole, prestress tensioning is greatly facilitated, meanwhile, the inclined wall plate of the third steel plate protective sleeve on the outer side of the inclined face can be directly used as a tensioning base plate, and the tensioning process is simplified.

(8) The studs are arranged on the inner walls of the steel plate sheaths, so that the integrity of the steel plate sheaths and the concrete is effectively improved, in addition, the axial stress of the arched beam assembly can be transmitted to the steel plate sheaths firstly and then transmitted to the studs through the steel plate sheaths, and the studs uniformly disperse the stress to the concrete, so that the stress concentration phenomenon is avoided.

Drawings

FIG. 1 is a schematic block diagram of one embodiment of the present invention;

FIG. 2 is a front view of the structure of one embodiment of the present invention;

FIG. 3 is a schematic structural view of a middle prefabricated section according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of an end precast segment of one embodiment of the present invention;

FIG. 5 is a cross-sectional view of a fourth end of the second end or end precast segment of the middle precast segment according to one embodiment of the present invention;

FIG. 6 is a cross-sectional view of a first end of a middle precast segment of one embodiment of the present invention;

fig. 7 is a cross-sectional view of a third end of an end preform segment according to an embodiment of the present invention.

Wherein: the prefabricated middle section 1, the arched girder assembly 1-1, the fixing member 1-1-1, the first end 11, the second end 12, the first vertical sleeve 13, the first lower through hole 111, the first upper through hole 112, the first upper clamping member 113, the first lower clamping member 114, the first end plate 116, the first upper arch plate 117, the first lower arch plate 118, the first bolt 119, the second lower through hole 121, the second upper through hole 122, the second upper clamping member 123, the second lower clamping member 124, the rubber layer 125, the second end plate 126, the second upper arch plate 127, the second lower arch plate 128, the second bolt 129, the prefabricated end section 2, the arched girder assembly 2-1, the third end 21, the fourth end 22, the second vertical sleeve 23, the third lower through hole 211, the third upper through hole 212, the third upper clamping member 213, the third lower clamping member 214, the inclined wall plate 216, the third upper arch plate 217, the second lower arch plate 218, the third bolt 219, the cross beam 3-1, The upper row of prestressed tendons 4, the lower row of prestressed tendons 5, an upper anchorage 6, a lower anchorage 7 and an upper and a lower rows of prestressed tendon through holes 8.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1-2, a self-resetting fabricated concrete arch bridge bracing includes at least two arch beam assemblies 1-1, 2-1 (the number of the arch beam assemblies may be plural according to the width requirement of the bridge) and a plurality of cross beams 3-1 which are arranged between the arch beam assemblies at intervals;

the arched beam assembly 1-1, 2-1 adopts a prefabricated reinforced concrete structure and comprises two middle prefabricated sections 1 and end prefabricated sections 2 arranged at two ends, wherein an upper row of pore channels and a lower row of pore channels are respectively arranged in the middle prefabricated sections 1 and the end prefabricated sections 2 at the same height positions in the radial direction of the arch along the axial direction of the arch, and the plurality of middle prefabricated sections and the end prefabricated arch sections at the two ends are connected in series in the axial direction of the arch;

the upper and lower rows of pore passages are respectively communicated with each other in the arched beam assembly to form an arched upper and lower rows of prestressed tendon through holes 8, and an upper row of prestressed tendons 4 and a lower row of prestressed tendons 5 are respectively arranged in the arched upper and lower rows of prestressed tendon through holes 8;

the middle prefabricated section 1 and the end prefabricated section 2 are respectively embedded with a plurality of first vertical sleeves 13 and a plurality of second vertical sleeves 23 at the positions where the cross beam 3-1 is arranged, and the cross beam 3-1 is connected in a locking manner through fixing pieces 1-1-1 arranged in the first vertical sleeves 13 and the second vertical sleeves 23.

As shown in fig. 3-4, the middle prefabricated section 2 comprises a first end 11 and a second end 12, the end surface of the first end 11 is a cylindrical semicircular convex surface extending along the arch axial direction, and the end surface of the second end 12 is a cylindrical semicircular concave surface extending along the arch axial direction;

prefabricated section 2 of tip includes third end 21 and fourth end 22, third end 21 is horizontal supporting seat, fourth end 22 the terminal surface with second end 11 end face structure is the same, cylindricality semicircle convex surface with cylindricality semicircle concave surface looks adaptation.

As shown in fig. 5-6, the first end 11 and the second end 12 are respectively provided with a first steel plate sheath and a second steel plate sheath, and the first steel plate sheaths are formed by welding a first upper arch plate 117, a first lower arch plate 118, two first side plates and a first end plate 116 attached to the outer side of the cylindrical arc convex surface, wherein the first upper arch plate 117, the first lower arch plate 118 and the two first side plates are wrapped around the middle prefabricated section body;

the second steel plate sheath is formed by welding a second upper arch plate 127, a second lower arch plate 128, two second side plates and a second end plate 126, wherein the second upper arch plate, the second lower arch plate and the two second side plates are wrapped around the middle prefabricated section body, and the second end plate is attached to the outer side of the cylindrical arc concave surface;

a first upper through hole 112 and a first lower through hole 111 are arranged at the position of the first end plate 116 corresponding to the upper row and the lower row of the pore canals, and a second upper through hole 122 and a second lower through hole 121 are arranged at the position of the second end plate 126 corresponding to the upper row and the lower row of the pore canals; the inner walls of the first steel plate sheath and the second steel plate sheath are respectively and uniformly provided with a first bolt 119 and a second bolt 129 which are anchored in the concrete.

As shown in fig. 4,5 and 7, the third end 21 and the fourth end 22 are respectively provided with a third steel plate sheath and a fourth steel plate sheath; the third steel plate sheath is formed by welding a peripheral wall plate completely covering the periphery of the horizontal supporting seat, a third upper arch plate 217 and a third lower arch plate 218 which are attached to part of the end prefabricated section body, and two third side plates; and the inner walls of the third steel plate sheath and the fourth steel plate sheath are respectively and uniformly provided with a third stud 219 and a fourth stud anchored in the concrete.

As shown in fig. 5 to 7, a first upper clamping piece 113 and a second upper clamping piece 123 are welded on the upper surfaces of the first upper arch plate 117 and the second upper arch plate 127; the lower surfaces of the first lower arch plate 118 and the second lower arch plate 128 are welded with a first lower clamping member 114 and a second lower clamping member 124.

The upper surface of the third upper arch plate 217 is welded with a third upper clamping member 213, and the lower surface of the third lower arch plate 218 is welded with a third lower clamping member 214.

A rubber layer 125 is compounded on the outer side of the second end plate; the fourth steel plate sheath has the same structure as the second steel plate sheath.

As shown in fig. 2 and 7, the lower outer end surface of the horizontal support seat is an inclined surface, and the inclined surface is perpendicular to the direction of the prestressed through hole 8; the third steel plate sheath is covered with an inclined wall plate 216 at the position of the inclined surface, a third upper through hole 212 and a third lower through hole 211 are arranged at the position of the inclined wall plate 216 corresponding to the upper row of the upper duct and the lower row of the duct, and the upper row of the prestressed tendons 4 and the lower row of the prestressed tendons 5 are directly anchored on the inclined wall plate through the upper anchorage device 6 and the lower anchorage device 7.

As shown in fig. 2, the upper and lower rows of ducts are formed by upper and lower rows of arched tubes pre-embedded in concrete, the arched tubes of the middle prefabricated section are welded and fixed between the first steel plate sheath and the second steel plate sheath, and the arched tubes of the end prefabricated section are welded and fixed and supported between the third steel plate sheath and the fourth steel plate sheath.

The fixing piece 1-1-1 is a split screw, and the lapping surface of the beam 3-1 and the arched beam assembly is completely matched with the upper surface of the arched beam assembly.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.