Self-adjusting joint structure suitable for splicing width of old bridge

Abstract

The utility model discloses a self-adjusting joint structure suitable for old bridge splicing width. The self-adjusting joint structure comprises a bottom plate, a first attaching plate, a second attaching plate, fasteners, a temporary top plate, embedded steel bars and a concrete post-cast strip. A first attaching plate and a second attaching plate are fixedly arranged at the two ends of the bottom top correspondingly. The first attaching plate is attached to a first wing plate and a first web plate of the old bridge, and the second attaching plate is attached to a second wing plate and a second web plate of the new bridge; the bottom plate is fixed at the bottoms of the old bridge and the new bridge through the fasteners; one end of the embedded steel bar penetrates through the first attaching plate to be embedded and fixed into the old bridge, and the other end of the embedded steel bar penetrates through the second attaching plate to be embedded and fixed into the new bridge. The temporary top plate is arranged on the tops of the first attaching plate and the second attaching plate in a buckled mode, and a gap between the old bridge and the new bridge is connected. And the concrete post-cast strip is arranged in the cavity of the joint structure. The self-adjusting joint structure is short in construction period, concrete is poured after settlement deformation of a new bridge is stable, and the problem of longitudinal cracking of the joint is solved.

Description

Technical Field

[0001] The embodiments of the utility model belong to the technical field of bridge reconstruction and expansion, and more specifically, relate to a self-adjusting joint structure suitable for widening old bridges. Background Art

[0002] With the rapid economic and social development of my country, road traffic volume continues to increase, and highway reconstruction and expansion projects are gradually increasing. The longitudinal widening wet joints of prefabricated bridges, when new and old bridges are widened, are becoming increasingly important. The current wet joint method requires on-site rebar planting, formwork installation, and concrete pouring, which not only prolongs the construction time but also significantly disrupts bridge traffic.

[0003] Chinese patent CN211922293U discloses a prefabricated bridge deck wet joint connection structure, including a steel plate, a rivet, and a steel bar eyelet; multiple rivets are welded and fixed to one end of the steel plate, and the rivets are used to be embedded in one end of the bridge deck when prefabricating a bridge deck; an epoxy mortar laying area is provided at the other end of the steel plate, and the epoxy mortar laying area is used to lay epoxy mortar, and the shortest distance between the epoxy mortar laying area and the rivet is greater than the width of the wet joint of two adjacent bridge decks; the steel bar eyelet is welded and fixed between the rivet and the epoxy mortar laying area and close to one side of the epoxy mortar laying area; the rivet, steel bar eyelet, and epoxy mortar laying area are located on the same surface of the steel plate. However, the patent structure is relatively complex and requires the installation of a steel plate. In addition, its construction does not take into account the problem of uneven settlement of the new and old bridges, which will cause longitudinal cracking of the wet joint in the later stage.

[0004] Therefore, at this stage, there is an urgent need for a self-adjusting joint structure suitable for widening old bridges, which can solve the shortcomings of the existing wet joint connection structure, such as long construction period and large interference with bridge traffic, and can solve the problem of longitudinal cracking of wet joints in the later stage. Summary of the Invention

[0005] In view of the problems that the joint structure of the existing technology has a long construction period and longitudinal cracks may be caused by bridge settlement in the later stage, the utility model provides a self-adjusting joint structure suitable for widening old bridges to solve such problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a self-adjusting joint structure suitable for widening an old bridge, including a base plate, which is fixed between the old bridge and the new bridge by fasteners; a first bonding plate fixed at one end of the top of the base plate, which is fixedly fitted with the first wing plate and the first web of the old bridge; a second bonding plate fixed at the other end of the top of the base plate, which is fixedly fitted with the second wing plate and the second web of the new bridge; a rebar with one end passing through the first bonding plate and implanted and fixed in the old bridge, and the other end passing through the second bonding plate and implanted and fixed in the new bridge; a temporary top plate that is buckled on the top of the first bonding plate and the second bonding plate, which connects the gap between the old bridge and the new bridge; and a concrete post-cast strip, which is post-cast in the joint structure cavity formed by the base plate, the first bonding plate and the second bonding plate.

[0007] Furthermore, the fasteners include high-strength bolts and nuts. By providing multiple groups of countersunk holes on the top of the first wing plate and the second wing plate along the bridge direction, corresponding first through holes are provided on the first bonding plate and the second bonding plate, and corresponding second through holes are provided on the base plate. High-strength bolts are used to pass through the corresponding countersunk holes, the first through holes and the second through holes in sequence and then fixedly connected with the nuts, thereby providing vertical tension on the base plate.

[0008] Furthermore, the bottom of the first bonding plate is fixed to one end of the top of the base plate by welding, and it includes a first inclined plate and a first vertical plate, wherein the first vertical plate is vertically fixed to one end of the top of the base plate, and its outer side is bonded to the first web; the first inclined plate is obliquely arranged at the top of the first vertical plate, and the angle between the two is the same as the angle between the first wing plate and the first web, so that the outer side of the first inclined plate is bonded to the first wing plate.

[0009] Furthermore, the first fitting plate is fixed to the side of the old bridge by multiple groups of first expansion bolts, so that the first vertical plate and the first web plate are firmly and tightly fitted, and the first inclined plate and the first wing plate are firmly and tightly fitted.

[0010] Furthermore, the bottom of the second bonding plate is fixed to the other end of the top of the base plate by welding, and it includes a second inclined plate and a second vertical plate, wherein the second vertical plate is vertically fixed to the other end of the top of the base plate, and its outer side is bonded to the second web plate; the second inclined plate is obliquely arranged at the top of the second vertical plate, and the angle between the two is the same as the angle between the second wing plate and the second web plate, so that the outer side of the second inclined plate is bonded to the second wing plate.

[0011] Furthermore, the second fitting plate is fixed to the side of the new bridge by multiple sets of second expansion bolts, so that the second vertical plate and the second web plate are firmly and tightly fitted, and the second inclined plate and the second wing plate are firmly and tightly fitted.

[0012] Furthermore, bolt holes are provided on the top of the first and second plywood plates, and bolts are threadedly connected to the bolt holes, thereby fixing the two ends of the temporary top plate to the top of the first and second plywood plates respectively.

[0013] Furthermore, the bottom plate, the first bonding plate and the second bonding plate are made of stainless steel.

[0014] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0015] (1) The self-adjusting joint structure of the present invention has a short construction period. By quickly completing the temporary structure construction of the self-adjusting joint, the road can be opened to traffic quickly, thereby reducing interference with traffic.

[0016] (2) The self-adjusting joint structure of the present invention effectively solves the problem of longitudinal cracking of the joint between the new bridge and the old bridge caused by settlement deformation. The self-adjusting joint structure can self-adjust to adapt to the deformation of the new and old bridges under the action of stress. After the settlement deformation between the new bridge and the old bridge is stabilized, the bridge deck pavement and the temporary top plate of the joint structure are removed, and high-strength concrete is poured in the cavity of the self-adjusting joint to form a concrete post-casting strip, completing the construction of the permanent joint structure and avoiding longitudinal cracking of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a self-adjusting joint structure suitable for widening an old bridge in an embodiment of the present utility model;

[0018] Figure 2 This is an exploded schematic diagram of the self-adjusting joint structure in an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the self-adjusting joint structure after completion in an embodiment of the present utility model.

[0020] In all the drawings, the same figure marks represent the same technical features, specifically: 1-old bridge, 101-first wing plate, 102-first web plate, 2-new bridge, 201-second wing plate, 202-second web plate, 3-bottom plate, 4-first bonding plate, 401-first inclined plate, 402-first vertical plate, 5-second bonding plate, 501-second inclined plate, 502-second vertical plate, 6-fasteners, 7-temporary top plate, 8-anchored reinforcement, 9-concrete post-cast strip. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0022] like Figure 1-3 As shown, the utility model provides a self-adjusting joint structure suitable for widening an old bridge, including a bottom plate 3, a first bonding plate 4, a second bonding plate 5, fasteners 6, a temporary top plate 7, embedded steel bars 8 and a concrete post-cast strip 9. The bottom plate 3 is located between the old bridge 1 and the new bridge 2, and a first bonding plate 4 and a second bonding plate 5 are fixed at both ends thereof; the first bonding plate 4 is bonded to the first wing plate 101 and the first web plate 102 of the old bridge 1, and the second bonding plate 5 is bonded to the second wing plate 201 and the second web plate 202 of the new bridge 2; the fasteners 6 fix the bottom plate 3 to the bottom of the old bridge 1 and the new bridge 2; one end of the embedded steel bar 8 passes through the first bonding plate 4 and is implanted and fixed in the old bridge 1, and the other end passes through the second bonding plate 5 and is implanted and fixed in the new bridge 2; the temporary top plate 7 is buckled and arranged on the top of the first bonding plate 4 and the second bonding plate 5 to connect the gap between the old bridge 1 and the new bridge 2; the concrete post-cast strip 9 is arranged in the joint structure cavity formed by the bottom plate 3, the first bonding plate 4 and the second bonding plate 5, and is formed by pouring concrete. The self-adjusting joint structure of the utility model has a short construction period and solves the problem of longitudinal cracking of the joint by pouring concrete after the settlement and deformation of the new bridge are stabilized.

[0023] like Figure 1-2 As shown, in the embodiment of the present invention, the width of the bottom plate 3 is the same as the distance between the first web 102 and the second web 202 , and it is fixed to the bottom of the old bridge 1 and the new bridge 2 by fasteners 6 .

[0024] The bottom of the first bonding plate 4 is fixed to the top end of the bottom plate 3 by welding, and it includes a first inclined plate 401 and a first vertical plate 402, wherein the first vertical plate 402 is vertically fixed to the top end of the bottom plate 3, and its outer side is bonded to the first web 102; the first inclined plate 401 is obliquely arranged at the top of the first vertical plate 402, and the angle between the two is the same as the angle between the first wing plate 101 and the first web 102, so that the outer side of the first inclined plate 401 is bonded to the first wing plate 101.

[0025] The bottom of the second bonding plate 5 is fixed to the other end of the top of the base plate 3 by welding, and it includes a second inclined plate 501 and a second vertical plate 502, wherein the second vertical plate 502 is vertically fixed to the other end of the top of the base plate 3, and its outer side is bonded with the second web 202; the second inclined plate 501 is obliquely arranged on the top of the second vertical plate 502, and the angle between the two is the same as the angle between the second wing plate 201 and the second web 202, so that the outer side of the second inclined plate 501 is bonded with the second wing plate 201.

[0026] Furthermore, the first bonding plate 4 is fixed to the side of the old bridge 1 by multiple sets of first expansion bolts, thereby firmly and tightly fitting the first vertical plate 402 to the first web 102, and firmly and tightly fitting the first inclined plate 401 to the first wing 101. The second bonding plate 5 is fixed to the side of the new bridge 2 by multiple sets of second expansion bolts, thereby firmly and tightly fitting the second vertical plate 502 to the second web 202, and firmly and tightly fitting the second inclined plate 501 to the second wing 201.

[0027] The fasteners 6 provide vertical tension for the base plate 3 and include high-strength bolts and nuts. A plurality of countersunk holes are provided along the bridge direction on the top of the first wing plate 101 and the second wing plate 201, corresponding first through holes are provided on the first bonding plate 4 and the second bonding plate 5, and corresponding second through holes are provided on the base plate 3. High-strength bolts are used to pass through the corresponding countersunk holes, the first through holes and the second through holes in sequence and then fixedly connected with the nuts, thereby providing vertical tension on the base plate 3.

[0028] In order to enhance the structural strength of the post-cast concrete strip 9, embedded steel bars 8 are provided in the cavity formed by the base plate 3, the first plywood 4 and the second plywood 5. The two ends of the embedded steel bars 8 are respectively vertically fixedly connected to the sides of the old bridge 1 and the new bridge 2. During construction, through holes can be opened in advance on the first plywood 4 and the second plywood 5, and the first web 102 and the second web 202 can be punched through the through holes. After the holes are opened, the steel bars are implanted.

[0029] The temporary top plate 7 is snap-fitted onto the top of the first bonding plate 4 and the second bonding plate 5 to bridge the gap between the old bridge 1 and the new bridge 2; further, in order to prevent the temporary top plate 7 from being lifted up by vibration, bolt holes are opened on the top of the first bonding plate 4 and the second bonding plate 5, and bolts are threadedly connected to the bolt holes, so that the two ends of the temporary top plate 7 are fixedly connected to the top of the first bonding plate 4 and the second bonding plate 5 respectively.

[0030] In order to prevent the joint structure from rusting and corroding, the bottom plate 3, the first plywood 4 and the second plywood 5 are made of stainless steel, and the high-strength bolts and nuts of the fasteners 6 are galvanized.

[0031] When the self-adjusting joint structure of the present invention is installed and constructed, corresponding holes are opened in advance on the first bonding plate 4 and the second bonding plate 5, and the first bonding plate 4 is fixed to the side of the old bridge 1 through multiple sets of first expansion bolts, so that the first vertical plate 402 and the first web 102 are firmly and tightly fitted, and the first inclined plate 401 and the first wing plate 101 are firmly and tightly fitted, and the second bonding plate 5 is fixed to the side of the new bridge 2 through multiple sets of second expansion bolts, so that the second vertical plate 502 and the second web 202 are firmly and tightly fitted, and the second inclined plate 501 and the second wing plate 201 are firmly and tightly fitted; holes are punched through the through holes to the first web 102 and the second web 202 respectively, and steel bars are implanted after the holes are drilled to complete the fixing operation of the embedded steel bars 8; the top ends of the bottom plate 3 are respectively fixed to the first bonding plate 4 by welding. , the bottom of the second plywood 5 is fixedly connected; high-strength bolts are used to pass through the corresponding countersunk holes, the first through-holes and the second through-holes in sequence and then fixedly connected with nuts, thereby providing vertical tension on the bottom plate 3; the temporary top plate 7 is buckled and arranged on the top of the first plywood 4 and the second plywood 5 and fixed with bolts; thereby quickly completing the temporary structure construction of the self-adjusting joint, and the traffic can be opened quickly with less interference to traffic; during the settlement and deformation process of the new bridge 2, the bottom plate 3, the first plywood 4 and the second plywood 5 in the temporary structure can self-adjust to adapt to the deformation of the new bridge and the old bridge under the action of stress. After the settlement and deformation between the new bridge 2 and the old bridge 2 are stabilized, the temporary top plate 7 of the bridge deck pavement and the joint structure is removed, and high-strength concrete is poured in the cavity of the self-adjusting joint to form a concrete post-cast strip 10, completing the construction of the permanent joint structure.

[0032] The self-adjusting joint structure of the utility model has a short construction period. By quickly completing the temporary structure construction of the self-adjusting joint, the road can be opened to traffic quickly, thereby reducing interference with traffic.

[0033] The self-adjusting joint structure of the present invention effectively solves the problem of longitudinal cracking of the joint between the new bridge and the old bridge caused by settlement deformation. The self-adjusting joint structure can self-adjust to adapt to the deformation of the new and old bridges under the action of stress. After the settlement deformation between the new bridge 2 and the old bridge 1 is stabilized, the bridge deck pavement and the temporary top plate 7 of the joint structure are removed, and high-strength concrete is poured in the cavity of the self-adjusting joint to form a concrete post-cast strip 10, completing the construction of the permanent joint structure and avoiding longitudinal cracking of the joint.

[0034] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-adjusting joint structure suitable for widening old bridges, characterized in that: include: A base plate (3) is fixed between the old bridge (1) and the new bridge (2) by fasteners (6); A first bonding plate (4) fixedly arranged at one end of the top of the bottom plate (3) is fixedly bonded to the first wing plate (101) and the first web plate (102) of the old bridge (1); A second bonding plate (5) fixedly arranged at the other end of the top of the bottom plate (3) is fixedly bonded to the second wing plate (201) and the second web plate (202) of the new bridge (2); One end of the reinforcing bar (8) passes through the first bonding plate (4) and is implanted and fixed in the old bridge (1), and the other end of the reinforcing bar passes through the second bonding plate (5) and is implanted and fixed in the new bridge (2); A temporary top plate (7) is fastened on top of the first laminating plate (4) and the second laminating plate (5) to connect the gap between the old bridge (1) and the new bridge (2); And a concrete post-cast strip (9), which is arranged in the joint structure cavity formed by the bottom plate (3), the first bonding plate (4) and the second bonding plate (5) by post-casting concrete.

2. The self-adjusting joint structure suitable for widening an old bridge according to claim 1, characterized in that: The fasteners (6) include high-strength bolts and nuts. A plurality of countersunk holes are provided on the tops of the first wing plate (101) and the second wing plate (201) along the bridge direction, corresponding first through holes are provided on the first bonding plate (4) and the second bonding plate (5), and corresponding second through holes are provided on the bottom plate (3). High-strength bolts are sequentially passed through the corresponding countersunk holes, the first through holes, and the second through holes and then fixedly connected with the nuts, thereby providing vertical tension on the bottom plate (3).

3. A self-adjusting joint structure suitable for widening an old bridge according to any one of claims 1-2, characterized in that: The bottom of the first bonding plate (4) is fixed to the top end of the bottom plate (3) by welding, and comprises a first inclined plate (401) and a first vertical plate (402), wherein the first vertical plate (402) is vertically fixed to the top end of the bottom plate (3), and its outer side is bonded to the first web (102); the first inclined plate (401) is obliquely arranged on the top of the first vertical plate (402), and the angle between the first inclined plate (401) and the first vertical plate (402) is the same as the angle between the first wing plate (101) and the first web (102), so that the outer side of the first inclined plate (401) is bonded to the first wing plate (101).

4. The self-adjusting joint structure suitable for widening an old bridge according to claim 3, characterized in that: The first fitting plate (4) is fixed to the side of the old bridge (1) by multiple sets of first expansion bolts, so that the first vertical plate (402) and the first web plate (102) are firmly and tightly fitted, and the first inclined plate (401) and the first wing plate (101) are firmly and tightly fitted.

5. A self-adjusting joint structure suitable for widening an old bridge according to any one of claims 1-2, characterized in that: The bottom of the second bonding plate (5) is fixed to the other end of the top of the bottom plate (3) by welding, and comprises a second inclined plate (501) and a second vertical plate (502), wherein the second vertical plate (502) is vertically fixed to the other end of the top of the bottom plate (3), and its outer side is bonded to the second web plate (202); the second inclined plate (501) is obliquely arranged on the top of the second vertical plate (502), and the angle between the second inclined plate (501) and the second vertical plate (502) is the same as the angle between the second wing plate (201) and the second web plate (202), so that the outer side of the second inclined plate (501) is bonded to the second wing plate (201).

6. The self-adjusting joint structure suitable for widening an old bridge according to claim 5, characterized in that: The second fitting plate (5) is fixed to the side of the new bridge (2) by multiple sets of second expansion bolts, so that the second vertical plate (502) and the second web plate (202) are firmly and tightly fitted, and the second inclined plate (501) and the second wing plate (201) are firmly and tightly fitted.

7. The self-adjusting joint structure suitable for widening an old bridge according to claim 5, characterized in that: Bolt holes are provided on the tops of the first bonding plate (4) and the second bonding plate (5), and bolts are threadedly connected to the bolt holes, thereby fixing the two ends of the temporary top plate (7) to the tops of the first bonding plate (4) and the second bonding plate (5), respectively.

8. A self-adjusting joint structure suitable for widening an old bridge according to any one of claims 1-2, characterized in that: The bottom plate (3), the first laminating plate (4) and the second laminating plate (5) are made of stainless steel.

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