CN218090481U - Connection structure of new and old bridging seam - Google Patents

Abstract

The utility model discloses a connection structure of old and new bridging seam, be provided with the old bridge of demolising the intercept point including upper portion, be provided with the new bridge of the intercept point of mating formation on, demolish the intercept point and form the interval of mating formation between the intercept point of mating formation, the subsiding crack between old bridge and the new bridge is arranged in the interval of mating formation, it is supreme the first layer of mating formation, the second layer of mating formation of having laid down in proper order to follow in the interval of mating formation, the subsiding crack top is arranged in to the first layer of mating formation. The utility model has the advantages that the settlement joint is arranged between the new bridge and the old bridge, and the first pavement layer and the second pavement layer are arranged on the upper part of the settlement joint, so that the stress state of the bridge structure is simple and clear, the analysis is easy, the normal use of the structure is not influenced, and the bridge deck driving stability is enhanced; the construction is simple, good effect is achieved in the actual construction for widening the old bridge, the construction period can be effectively shortened, the construction cost is greatly reduced, the safety influence is not easy to occur, frequent maintenance is not needed, and the method is suitable for wide popularization and application.

Description

Connection structure of new and old bridging seam

Technical Field

The utility model relates to a building structure technical field specifically indicates a connection structure of new and old bridging seam.

Background

Generally, aiming at the widening and the transformation of an old bridge, a new bridge can be built on one side or two sides of the old bridge, and then the joint position of the new bridge and the old bridge is blocked, so that the old bridge and the new bridge are integrated, the old bridge is widened, the old bridge can be fully utilized, and the manufacturing cost is reduced. In order to reduce the stress influence of a newly-built bridge on an old bridge, the position of a seam between the new bridge and the old bridge is usually treated by adopting a longitudinal middle seam or a wet seam at present.

The longitudinal middle joints are adopted between the new bridge and the old bridge, so that the new bridge and the old bridge can be stressed respectively, and the stress complexity of the bridges is simplified. However, hidden dangers are easy to appear on the large cantilever box girder structure by the longitudinal seams. The bridge deck pavement of longitudinal joint can be along the longitudinal joint fracture, influences the driving comfortable and pleasing to the eye, and the later maintenance is frequent.

And if wet joints are adopted for connecting the new bridge and the old bridge, the process needs to chisel off the concrete at the flange edge of the outermost beam of the old bridge, expose the flange reinforcing steel bars of the old bridge, then connect the new bridge and the old bridge, and reapply pour the concrete, so that the new bridge and the old bridge are rigidly connected into a whole. The processing mode can enhance the driving comfort of the bridge deck, but the construction is complex, the stress complex state of the bridge structure is increased, the bridge structure is easy to crack, and the normal use of the structure is influenced.

Therefore, how to solve the joint of the new and old bridge is a problem that needs to be solved urgently in the widening and reconstruction of the old bridge.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a structure stress state is simple clear and definite, and easy analysis effectively blocks water, and convenient the maintenance, crack resistance is good, the firm in structure's connection structure of new and old bridging seam.

The utility model discloses a following technical scheme realizes: the utility model provides a connection structure of old and new bridging seam, is provided with the old bridge of demolising the stop point including upper portion, is provided with the new bridge of the stop point of mating formation on, demolish the stop point and form the interval of mating formation between the stop point of mating formation, the settlement joint between old bridge and the new bridge is arranged in the interval of mating formation, from supreme first layer, the second layer of mating formation of having laid down in proper order in the interval of mating formation, the settlement joint top is arranged in to the first layer of mating formation.

The working principle of the technical scheme is that the settlement joint is arranged between the new bridge and the old bridge, and the first pavement layer and the second pavement layer are arranged on the upper part of the settlement joint, so that the stress state of the bridge structure is simple and clear, the analysis is easy, the normal use of the structure is not influenced, and the bridge deck driving stability is enhanced; the construction is simple, good effect is achieved when the method is actually used for widening old bridges, the construction period can be effectively shortened, and the construction cost is greatly reduced.

In order to better realize the utility model, furthermore, the width of the settlement joint is 1 to 5cm.

For better realization the utility model discloses, furtherly, the first layer of mating formation includes the chloroprene rubber board, chloroprene rubber board upper portion is provided with the reinforcing bar layer of mating formation of pouring through reinforced concrete, the one end of mating formation reinforcing bar layer and old bridge are gone up and are demolishd the steel bar welding of ending point department, and the steel bar welding of mating formation ending point department is gone up to the other end of mating formation reinforcing bar layer and new bridge.

For better realization the utility model discloses, furtherly, still be mixed with steel fibre in the reinforced concrete of mat formation reinforcing bar layer.

For better realization the utility model discloses, furtherly, the second layer of mating formation is the glass fiber grid layer through asphalt concrete placement.

For better realization the utility model discloses, furtherly, the first layer of mating formation and the second of mating formation still are provided with waterproof coating between the layer.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

(1) The utility model has the advantages that the settlement joint is arranged between the new bridge and the old bridge, and the first pavement layer and the second pavement layer are arranged on the upper part of the settlement joint, so that the stress state of the bridge structure is simple and clear, the analysis is easy, the normal use of the structure is not influenced, and the bridge deck driving stability is enhanced;

(2) The utility model provides a connection structure of new and old bridging seam, its construction is comparatively simple, has obtained good effect in the construction that actually is used for widening old bridge, can effectively shorten construction cycle, and reduce construction cost by a wide margin;

(3) The utility model discloses simple structure, but the result of use is better, can simplify the atress condition of reforming transform bridge, is difficult for appearing safe the influence, need not frequent maintenance, suitable extensive popularization and application.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic plan view of the present invention.

Wherein: 1-old bridge, 2-new bridge, 3-settlement joint, 4-demolish cut-off point, 5-pavement cut-off point, 6-first pavement layer, 61-chloroprene rubber plate, 62-pavement reinforcing steel layer, 7-second pavement layer and 8-waterproof coating.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the definitions of "first" and "second" are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly including one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

the major structure of this embodiment, as shown in fig. 1, be provided with the old bridge 1 of demolising the intercept point 4 including upper portion, be provided with the new bridge 2 of the intercept point 5 of mating formation on, demolish the intercept point 4 and form the interval of mating formation between the intercept point 5 of mating formation, the subsiding crack 3 between old bridge 1 and the new bridge 2 is arranged in the interval of mating formation, from supreme first layer 6, the second layer 7 of mating formation of having laid in proper order down in the interval of mating formation, the first layer 6 of mating formation is arranged in the subsiding crack 3 top.

The specific implementation mode is that the method comprises the following steps:

s1: retesting and verifying the elevation and the coordinate of the spliced wide side edge of the old bridge 1, and verifying the elevation and the designed elevation of the new bridge 2;

s2: locally enclosing the widened side edge of the old bridge, temporarily occupying part of lanes for construction, arranging temporary anti-collision facilities, traffic warning signs and the like, and generally cutting the flange and the anti-collision wall of the old bridge at the same time;

s3: dismantling the flange in the range of 1m on the widening side of the old bridge 1;

s4: constructing widened pile foundations, pier studs, supports, cushion stones, supports, templates and the like of the new bridge 2;

s5: constructing the upper structure of the new bridge 2, specifically comprising pre-stressed tensioning, grouting, anchor sealing and concrete pouring, and removing a template and a bracket of the new bridge 2 after the age of concrete meets the requirement;

s6: firstly, cutting flanges and an anti-collision wall of an old bridge according to the actual engineering condition, reserving a settlement joint 3 at the position of a new bridge joint and an old bridge joint, and chiseling the old bridge to the position of a cut-off point for removing the old bridge;

s7: constructing the lower part and the main body structure of the new bridge, and completing paving until a first paving stop point of the new bridge;

s8: carrying out bridge deck pavement construction at the joint position of the new bridge and the old bridge, completing the paving process of the first pavement layer 6 and the second pavement layer 7, and removing the enclosure, the stacking and other facilities after the strength meets the design requirement;

s9: carrying out a load test on the widened bridge;

s10: and after the experiment is passed, opening traffic and putting into operation.

Example 2:

in the embodiment, on the basis of the above embodiment, the width of the settlement joint 3 between the old bridge 1 and the new bridge 2 is further defined, and the width of the settlement joint 3 is 1 to 5cm. According to actual use measurement, the optimal width of the settlement joint 3 is 2cm, and when the connecting structure of the new bridge joint and the old bridge joint is used, the stability of the joint of the new bridge 2 and the old bridge 1 can be ensured. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.

Example 3:

in this embodiment, the structure of the first pavement layer 6 is further defined, as shown in fig. 1, the first pavement layer 6 includes a neoprene sheet 61, a pavement steel bar layer 62 poured by reinforced concrete is disposed on the neoprene sheet 61, one end of the pavement steel bar layer 62 is welded to the steel bar at the dismantling stop point 4 on the old bridge 1, and the other end of the pavement steel bar layer 62 is welded to the steel bar at the dismantling stop point 5 on the new bridge 2. The chloroprene rubber plate 61 can effectively retain water, and adverse effects on the whole bridge caused by water leakage of the settlement joint are avoided. The two ends of the paving reinforcing steel bar layer 62 are respectively welded with the reinforcing steel bars at the dismantling cut-off point 4 of the old bridge 1 and the paving cut-off point 5 on the new bridge 2, so that the integral crack resistance of the bridge body can be improved, and the stable passing of vehicles on the bridge deck at the upper part of the settlement joint 3 is ensured. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.

Example 4:

in this embodiment, based on the above-mentioned embodiment, the structure of the first pavement layer 6 is further defined, and the reinforced concrete of the pavement steel bar layer 62 is also doped with steel fibers. Steel fibers are added into the reinforced concrete, so that the expansion of micro cracks and the formation of macro cracks in the concrete can be effectively hindered, the stability and the durability between the new bridge 2 and the old bridge 2 are improved, and the smooth passing of vehicles on the bridge deck at the upper part of the settlement joint 3 is ensured. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.

Example 5:

in the present embodiment, the structure of the second pavement layer 7 is further defined on the basis of the above-mentioned embodiments, and as shown in fig. 1, the second pavement layer 7 is a glass fiber grid layer poured by asphalt concrete. The glass fiber grating layer poured by the asphalt concrete can effectively prevent the reflection cracks from appearing on the bridge floor, improve the integral durability of the bridge body and ensure the stable passing of vehicles on the bridge floor at the upper part of the settlement joint 3. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.

Example 6:

in this embodiment, on the basis of the above embodiment, a waterproof coating 8 is further added, and as shown in fig. 1, a waterproof coating 8 is further disposed between the first pavement layer 6 and the second pavement layer 7. Add waterproof coating 8, can prevent the infiltration of moisture effectively, avoid the subsiding crack to leak and lead to the fact adverse effect to the bridge is whole, in addition, can also make the layer of mating formation 7 and the first layer of mating formation 6 between can the organic form a whole, further guarantee that the structure of subsiding crack 3 is firm between old bridge 1 and the new bridge 2, improve the durability of remodeling the bridge. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.

It is to be understood that the connection structure of the old and new bridge seams according to an embodiment of the present invention, for example, the working principle and working process of the components such as the neoprene sheet 61 and the waterproof coating 8, are well known to those skilled in the art, and will not be described in detail herein.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (6)

1. The utility model provides a connection structure of new and old bridging seam, its characterized in that is provided with including upper portion old bridge (1) of demolising intercept point (4), is provided with new bridge (2) of the intercept point (5) of mating formation on, demolish intercept point (4) and form the interval of mating formation between the intercept point (5) of mating formation, settle joint (3) between old bridge (1) and new bridge (2) are arranged in the interval of mating formation, it has laid first layer (6), the second layer (7) of mating formation in proper order to lay down supreme in the interval of mating formation, settle joint (3) top is arranged in to first layer (6) of mating formation.

2. The connection structure of the new bridge seam and the old bridge seam as claimed in claim 1, wherein the width of the settlement joint (3) is 1 to 5cm.

3. A connection structure of a new bridge and an old bridge joint according to claim 1 or 2, characterized in that the first pavement layer (6) comprises a neoprene sheet (61), a pavement steel bar layer (62) poured by reinforced concrete is arranged on the upper portion of the neoprene sheet (61), one end of the pavement steel bar layer (62) is welded with the steel bar at the dismantling cut point (4) of the old bridge (1), and the other end of the pavement steel bar layer (62) is welded with the steel bar at the paving cut point (5) of the new bridge (2).

4. The connection structure of a new and old bridge joint as claimed in claim 3, wherein the reinforced concrete of the pavement steel bar layer (62) is further doped with steel fibers.

5. A connection structure of a new and old bridge joint according to claim 1 or 2, characterized in that said second layer (7) is a fiberglass grid layer poured by asphalt concrete.

6. The connection structure of a new bridge joint and an old bridge joint as claimed in claim 1 or 2, characterized in that a waterproof coating (8) is further arranged between the first pavement layer (6) and the second pavement layer (7).

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