Prefabricated widening bridge joint displacement expansion joint device adopting segmented expansion steel plates

Abstract

The utility model discloses a prefabricated widening bridge joint displacement expansion joint device adopting segmented expansion steel plates, which is mounted on a bridge structure on two sides of a discontinuous joint of a bridge floor at a widening position of a new bridge and an old bridge in a transverse bridge direction. Comprising trapezoidal anchoring steel plates, segmented telescopic steel plates, rubber waterstops, mounting brackets, connecting steel bars and post-cast steel fiber concrete, and one set of segmented telescopic steel plates is composed of segmented telescopic cover plates and segmented telescopic supporting plates. According to the expansion joint device, the expansion cover plate and the expansion supporting plate are adopted to adapt to longitudinal joint dislocation and transverse expansion deformation caused by uncoordinated deformation of a new bridge and an old bridge, so that a bridge floor is continuous and smooth, the attractiveness and the use function of a bridge structure are ensured, and meanwhile, standardization, prefabrication and finished product of the expansion joint device can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of spliced wide bridge joint, particularly relates to a prefabricated spliced wide bridge joint displacement expansion joint device using sectional expansion steel plate. BACKGROUND

[0002] In order to improve the traffic capacity, and also for reducing the property loss and the fund waste caused by repeated demolition and reconstruction, the reconstruction and expansion projects gradually increase in China in recent years. The reconstruction and expansion mode of bridge section mainly is to widen and transform on the basis of existing structure, to preserve the old bridge body structure, and to newly build the spliced wide bridge near the old bridge, to remove the anti-collision guardrail of the old bridge edge, to newly lay the bridge deck pavement, to realize the expansion of current road width and the increase of lane number.

[0003] The bridge splicing is divided into various types according to the upper and lower relative relationship of new and old bridges, wherein the upper and lower structure of new bridge is independent from the old bridge, which is the commonly used scheme. The new and old bridges are independently stressed, the upper and lower structures do not affect each other, the force transmission is clear, the structure stress mode is relatively clear, the design is safe and convenient, and the old bridge traffic does not need to be interrupted during the construction of new bridge, and the new and old bridges can be independently maintained in later period. However, for the "bridge head bumping" phenomenon, temperature thermal expansion and contraction phenomenon and concrete shrinkage and creep phenomenon and other conditions generated when the vehicle wheels travel from the old bridge to the new bridge, due to the non-cooperative stress and the inconsistent stiffness of new and old bridges, the deformation of new and old bridges is not coordinated, the longitudinal joint at the bridge splicing place will continuously dislocate and shift, the transverse tension deformation will occur, the bridge continuous pavement will be cracked, the vehicle driving comfort will be reduced, and the appearance and normal use of bridge structure will be affected. The conventional bridge hole line expansion joint is applied to the splicing place, the expansion joint steel bars need to be pre-buried or implanted, the steel bar types are more, the on-site welding process is complex, the construction difficulty is large, and the construction period is long. Therefore, the prefabricated spliced wide bridge joint displacement expansion joint device using sectional expansion steel plate is provided for the above problems. UTILITY MODEL CONTENTS

[0004] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0005] A prefabricated spliced wide bridge joint displacement expansion joint device using sectional expansion steel plate, the expansion joint device is installed on the bridge structure on both sides of the discontinuous joint of the bridge deck at the transverse bridge splicing place of new and old bridges, and comprises trapezoidal anchor steel plate, sectional expansion steel plate, rubber waterstop, mounting bracket, connecting steel bar and post-poured steel fiber concrete. One group of sectional expansion steel plates is composed of two types of sectional expansion cover plates and sectional expansion support plates, and is respectively located on the bridge structure on both sides of the spliced wide bridge joint. The sectional expansion cover plate spans the joint and is arranged above the sectional expansion support plate. The bridge structure is grooved and the concrete is removed to expose the bridge beam steel bars. The groove depth is not less than 80mm, and the length is not less than 12 times the diameter of the exposed bridge beam steel bars.

[0006] Preferably, the segmented telescopic cover plate is arranged above the segmented telescopic supporting plate across the joint, the contact surface is polished, polished and coated with high-efficiency lubricant, the cover plate can freely slide on the supporting plate in both directions, the free sliding distance is the maximum allowable displacement distance, the distance between each group of telescopic steel plates is the same, preferably 1000mm, which can be adjusted according to the site.

[0007] Preferably, the short side of the trapezoidal anchoring steel plate is flush with the edge of the segmented telescopic steel plate, the long side of the trapezoidal anchoring steel plate has a length of no less than 10 times the diameter of the connecting steel bar plus 100mm, and is respectively welded and fixed, the trapezoidal anchoring steel plate is arranged every 200mm along the joint, and the positions of the trapezoidal anchoring steel plates are staggered with the segmented positions of the segmented telescopic steel plate, each piece of the segmented telescopic steel plate is welded with four vertical trapezoidal anchoring steel plates, and the edge of the trapezoidal anchoring steel plate is reserved with a fixed position of a rubber waterstop and a mounting bracket.

[0008] Preferably, the rubber waterstop and the mounting bracket are arranged in the joint of the widened bridge, the lower side of the segmented telescopic cover plate, the rubber waterstop and the mounting bracket are reserved with a groove, the groove has a certain depth and an inner inclination angle, and can be clamped and fixed on the trapezoidal anchoring steel plate.

[0009] Preferably, the segmented telescopic steel plate, the trapezoidal anchoring steel plate, the rubber waterstop and the mounting bracket and the connecting steel bar can be manufactured, welded and fixed in the factory to realize standardization, prefabrication and finalization, and are assembled into a telescopic joint device, one set of the telescopic joint device includes one group of segmented telescopic steel plates, eight trapezoidal anchoring steel plates, eight connecting steel bars and one set of rubber waterstop and mounting bracket.

[0010] Preferably, the connecting steel bar in the telescopic joint device is welded and fixed with the exposed bridge girder steel bar in the slot, and the welding length is no less than 10 times the diameter of the larger one of the connecting steel bar and the exposed bridge girder steel bar.

[0011] Preferably, after the telescopic joint device is welded and fixed and installed, the slot area is poured with steel fiber concrete, and the steel fiber content is no less than 50kg / m 3 .

[0012] Preferably, the thickness of the trapezoidal anchoring steel plate 1 is 14mm, the thickness of the segmented telescopic cover plate 2 is 14mm, the thickness of the thinnest part of the segmented telescopic supporting plate 3 is 10mm, the thickness of the thickest part is 24mm, and the diameter of the connecting steel bar 5 is 16mm.

[0013] Preferably, the steel plates 1-3 are Q235 steel plates, the post-poured concrete 6 is C50 steel fiber concrete, and the connecting steel bar 5 is HRB400 steel bar.

[0014] Compared with the prior art, the telescopic cover plate and the telescopic supporting plate of the utility model adapt to the longitudinal joint displacement and the transverse telescopic deformation caused by the incoordination of the deformation of the new and old bridges, so that the bridge deck is continuous and smooth, and the appearance and use function of the bridge structure are guaranteed.

[0015] (2) The sectional prefabricated expansion steel plate not only reduces the difficulty of production and installation, but also plays a role in limiting longitudinal displacement, and avoids longitudinal extrusion stress damage of the expansion steel plate itself due to longitudinal deformation.

[0016] (3) The utility model discloses a new type of expansion joint device for wide bridge joint displacement, which can realize standard element production in a factory, machine welding and factory finished product, and only needs to weld and install the finished expansion joint device and the exposed beam steel of the bridge slot in the field, thereby greatly reducing the field construction difficulty and construction period, and only needs to adjust part of the expansion joint device for later maintenance, and is convenient to replace, which is a safe, convenient and efficient new type of wide bridge joint displacement expansion joint device. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0018] Fig. 1 It is a sectional arrangement drawing of the embodiment of the utility model;

[0019] Fig. 2 It is a plan arrangement drawing of the embodiment of the utility model.

[0020] The reference numerals in the drawing are explained as follows: trapezoidal anchor steel plate 1, sectional expansion cover plate 2, sectional expansion supporting plate 3, rubber waterstop and installation bracket 4, connecting steel bar 5, steel fiber concrete 6, exposed bridge beam steel 77, bridge structure 8, wide bridge joint 9, slot area 10. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical scheme in the embodiments of the utility model, and obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] In the description of the utility model, it is to be explained that, unless there are explicit provisions and limitations, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be fixed connection, also can be detachable connection, or integrally connected, it can be mechanical connection, also can be electrical connection, it can be directly connected, also can be indirectly connected through intermediate medium, it can be the communication inside two elements, for ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0023] Please refer to Figs. 1-2 The utility model provides an embodiment: a prefabricated widening bridge joint displacement expansion joint device using sectional expansion steel plate, expansion joint device is installed on the both sides of bridge structure of new bridge and old bridge transverse bridge widening bridge deck discontinuous joint, it is characterized by: including trapezoidal anchoring steel sheet 1, sectional expansion steel plate, rubber waterstop and installation bracket 4, connecting steel bar 5 and post-cast steel fiber concrete 6, a group of sectional expansion steel plate is composed of sectional expansion cover plate 2 and sectional expansion support plate 3 two types, respectively located on the both sides of bridge structure 8 of widening bridge joint, sectional expansion cover plate 2 spans joint and is set up above sectional expansion support plate 3, bridge structure 8 is grooved and removes concrete to expose bridge girder reinforcement 7, the depth of groove area 10 is not less than 80mm, and the length is not less than 12 times diameter of exposed bridge girder reinforcement 7.

[0024] Sectional expansion cover plate 2 spans joint and is set up above sectional expansion support plate 3, contact surface is polished, polished and coated with high-efficiency lubricant, cover plate can bidirectional free sliding on support plate, and sliding free distance is the maximum displacement distance allowed, and the sectional spacing of each group of expansion steel plate is same, preferably 1000mm, which can be adjusted according to the scene.

[0025] Trapezoidal anchoring steel sheet 1 short side is flush with sectional expansion steel plate edge, and the length of trapezoidal anchoring steel sheet 1 long side is not less than 10 times diameter of connecting steel bar 5+100mm, and is respectively correspondingly welded and fixed, trapezoidal anchoring steel sheet 1 is set every 200mm along joint, and is staggered sectional expansion steel plate sectional position, and each sectional expansion steel plate is welded with 4 vertical trapezoidal anchoring steel sheets 1, and the edge of trapezoidal anchoring steel sheet 1 is reserved with the fixed position of rubber waterstop and installation bracket 4.

[0026] Rubber waterstop and installation bracket 4 are set in the widening bridge joint, and the lower side of sectional expansion cover plate 2, the recess of rubber waterstop and installation bracket 4 is reserved, and the recess has a certain depth and inner inclination angle, and can be clamped and fixed on trapezoidal anchoring steel sheet 1.

[0027] The manufacturing, welding and fixing of the segmented telescopic steel plate, the trapezoidal anchoring steel plate 1, the rubber waterstop and the mounting bracket 4 and the connecting steel bar 5 can be realized in a factory in a standardized, prefabricated and finished product form, and the segmented telescopic joint device is assembled, and a set of the segmented telescopic joint device comprises a group of segmented telescopic steel plates, eight trapezoidal anchoring steel plates 1, eight connecting steel bars 5 and a set of rubber waterstops and mounting brackets 4.

[0028] The connecting steel bar 5 and the exposed bridge girder steel bar 7 in the segmented telescopic joint device are welded and fixed, and the welding length is not less than 10 times of the diameter of the larger one of the connecting steel bar 5 and the exposed bridge girder steel bar 7.

[0029] After the segmented telescopic joint device is welded and fixed and installed, the grooving area 10 is poured with the post-poured C50 steel fiber concrete 6, and the steel fiber content is not less than 50 kg / m 3 .

[0030] The trapezoidal anchoring steel plate 1 has a thickness of 14 mm, the segmented telescopic cover plate 2 has a thickness of 14 mm, the thinnest part of the segmented telescopic supporting plate 3 has a thickness of 10 mm, the thickest part of the segmented telescopic supporting plate 3 has a thickness of 24 mm, and the connecting steel bar 5 has a diameter of 16 mm.

[0031] The steel plates 1-3 are all Q235 steel plates, the post-poured concrete 6 is C50 steel fiber concrete, and the connecting steel bar 5 is an HRB400 steel bar.

[0032] In use, (1) the bridge deck pavement and the surface layer concrete of the bridge girder are chipped to expose the bridge girder steel bar, the grooving depth is not less than 80 mm, the length is not less than 12 times of the diameter of the exposed bridge girder steel bar, the bridge deck pavement steel bar is broken, the bridge girder steel bar is completely reserved, the residual concrete is cleaned, or a groove area is reserved on the newly-built bridge girder and bridge deck pavement, the groove area edge is blasted and chipped, and the exposed bridge girder steel bar is reserved;

[0033] (2) the segmented telescopic joint device is manufactured in a factory. The steps are as follows: 1. four trapezoidal anchoring steel plates corresponding to each segmented telescopic cover plate and segmented telescopic supporting plate are welded respectively, and the anchoring steel plates are always perpendicular to the telescopic cover plate and the supporting plate during the welding process, and the two sides adopt fillet welds. 2. the contact surfaces of the cover plate and the supporting plate are polished, polished and brushed with high-efficiency lubricant. 3. the connecting steel bar and the anchoring steel plate are welded, and the welding length is not less than 10 times of the diameter of the connecting steel bar. 4. the rubber waterstop and the mounting bracket are clamped to the edge of the anchoring steel plate. 5. a pre-sliding test is conducted to ensure that the cover plate group can freely slide on the supporting plate group in two directions. 6. a set of the segmented telescopic joint device is assembled. 7. a set of the segmented telescopic joint device should be stored according to the actual use state of the group of segmented telescopic cover plates and segmented telescopic supporting plates, so as to avoid tearing the rubber waterstop;

[0034] (3) demarcate the installation side of the sectional expansion cover plate and the installation side of the sectional expansion support plate on the bridge structure, and demarcate the installation area of each group of sectional expansion steel plates and the corresponding beam body steel bars, and weld the connecting steel bars in the expansion joint device with the exposed bridge beam body steel bars, and the welding length is not less than 10 times of the diameter of the larger one of the connecting steel bars and the exposed bridge beam body steel bars;

[0035] (4) after checking, erect the template, pour the steel fiber concrete in the groove, and perform maintenance.

[0036] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0037] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A prefabricated bridge joint expansion joint device using segmented telescopic steel plates, wherein the expansion joint device is installed on both sides of the bridge structure at the discontinuous joint of the bridge deck at the transverse widening point between the new and old bridges, characterized in that: The invention relates to a kind of expansion joint device for bridge widening, which comprises trapezoidal anchoring steel plate (1), segmented expansion steel plate, rubber waterstop and mounting bracket (4), connecting steel bar (5) and post-cast steel fiber concrete (6). The segmented expansion steel plate consists of two types of segmented expansion cover plate (2) and segmented expansion support plate (3), which are respectively located on the bridge structure (8) on both sides of the bridge joint. The segmented expansion cover plate (2) spans the joint and is set above the segmented expansion support plate (3). The bridge structure (8) is grooved and the concrete is removed to expose the bridge beam steel bar (7). The depth of the groove (10) is not less than 80mm, and the length is not less than 12 times the diameter of the exposed bridge beam steel bar (7).

2. The expansion joint device for prefabricated widening bridge joints with segmented expansion steel plates according to claim 1, characterized in that: The segmented expansion cover plate (2) is set above the segmented expansion support plate (3) across the joint. The contact surface is polished, polished and coated with high-efficiency lubricant. The cover plate can slide freely on the support plate in both directions, with a free sliding distance of the maximum allowable displacement distance. The segmented expansion steel plate has the same segment spacing, preferably 1000mm, which can be adjusted according to the site.

3. The expansion joint device for precast spliced bridge with segmented expansion joint according to claim 1, characterized in that: The short side of the trapezoidal anchoring steel plate (1) is flush with the edge of the segmented expansion steel plate. The long side of the trapezoidal anchoring steel plate (1) has a length of not less than 10 times the diameter of the connecting steel bar (5) + 100mm, and is respectively welded and fixed. The trapezoidal anchoring steel plate (1) is arranged every 200mm along the joint, and is staggered with the segmented expansion steel plate segment position. Each segmented expansion steel plate is welded with four vertical trapezoidal anchoring steel plates (1). The edge of the trapezoidal anchoring steel plate (1) is reserved for the fixing position of the rubber waterstop and mounting bracket (4).

4. The expansion joint device for precast spliced bridge with segmented expansion joint according to claim 1, characterized in that: The rubber waterstop and mounting bracket (4) are arranged in the bridge joint for widening, below the segmented expansion cover plate (2). The rubber waterstop and mounting bracket (4) have a recess with a certain depth and internal inclination angle, which can be clamped and fixed on the trapezoidal anchoring steel plate (1).

5. The expansion joint device for precast spliced wide bridge joints with segmented expansion steel plates according to claim 1, characterized in that: The segmented expansion steel plate, trapezoidal anchoring steel plate (1), rubber waterstop and mounting bracket (4) and connecting steel bar (5) can be manufactured, welded and fixed in the factory to realize standardization, prefabrication and finished product. A set of expansion joint device includes a group of segmented expansion steel plates, eight trapezoidal anchoring steel plates (1), eight connecting steel bars (5) and a set of rubber waterstop and mounting bracket (4).

6. The expansion joint device for precast spliced bridge with segmented expansion joint according to claim 5, characterized in that: The connecting steel bar (5) in the expansion joint device is welded and fixed with the grooved exposed bridge beam steel bar (7). The welding length is not less than 10 times the diameter of the larger one of the connecting steel bar (5) and the exposed bridge beam steel bar (7).

7. The expansion joint device for precast spliced bridge according to claim 6, characterized in that: After the said expansion joint device is welded and fixedly installed, the slot area (10) is poured with post-poured steel fiber concrete (6), and the steel fiber content is not less than 50 kg / m 3 .

Images