CN219175031U - Light combined bridge reconstructed by old bridge gate - Google Patents

Abstract

The light combined bridge reconstructed by using the old bridge gate comprises the old bridge gate, an I-shaped steel beam, bridge decks, main beams, secondary beams and bridge decks, wherein the I-shaped steel beam is arranged at the top of the old bridge gate to form a bridge pier top supporting beam, the middle part of the main beam is arranged at the bridge pier top supporting beam, limiting blocks are arranged at the front side and the rear side of the bridge pier top supporting beam at the bottom, the bridge decks are arranged at the front side and the rear side of the bridge gate, and the front end and the rear end of the main beam are erected on the bridge decks; the bridge deck is arranged to be connected with the bridge deck in two sections, the joint of the two sections of bridge decks is connected by using an L-shaped buckling part, and a gap for small-amplitude displacement of the bridge deck is reserved at the L-shaped buckling part. In this scheme, utilize old and useless bridge floodgate to regard it as middle pier, then pour concrete formation light-duty combination bridge floor on prefabricated key groove board, set up double-span arch steel structure crane span structure, affiliated arrangement cantilever steel structure cable frame, can make full use of old bridge floodgate, realize the construction of multi-functional bridge, have simple structure, green, with low costs, the characteristics of time limit for a project weak point.

Description

Light combined bridge reconstructed by old bridge gate

Technical Field

The utility model relates to the technical field of bridge building construction, in particular to a light combined bridge reconstructed by using old bridge gates.

Background

Due to development and modification of economic construction, old buildings are often abandoned and removed, such as old bridge brakes are abandoned due to reservoir reconstruction, if a bridge is constructed at the position of the old bridge brakes, the existing common practice is to disassemble the old bridge brakes and then re-construct the main and secondary beams.

Disclosure of Invention

The utility model aims to solve the technical problems and provides a light combined bridge reconstructed by using the old bridge gate, the structure fully utilizes the old bridge gate, the old bridge gate is reconstructed into a bridge pier, the bridge pier is taken as a middle support, and the bridge is erected, so that the light combined bridge has the characteristics of low cost, short construction period and environmental protection.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a utilize light-duty combination bridge that old bridge gate was reformed, including old bridge gate, I-steel crossbeam, abutment, girder, secondary beam and bridge floor, the post reinforcing bar of old bridge gate extends at least 15cm, the reinforcing bar passes the preformed hole on the I-steel crossbeam, make I-steel crossbeam install the top of old bridge gate, then adopt concrete to wrap up the I-steel crossbeam and cover and form pier top supporting beam, girder and secondary beam both adopt the I-steel girder, link together through backing plate and bolt between girder and the secondary beam, the middle part of girder is fixed on pier top supporting beam, the bottom is provided with the stopper in the front and back both sides of pier top supporting beam, leave the clearance that can supply girder front and back small amplitude displacement between stopper and the pier top supporting beam, the abutment is installed in the front and back both sides of bridge gate, the front and back both ends of girder set up on the abutment, and pass through the bolt fastening; the bridge deck sets up to two segmentation bridge decks of being connected mutually, and the junction of two segmentation bridge decks uses L shape lock to connect, and L shape lock department leaves the clearance that can supply bridge deck front and back small amplitude displacement, and two segmentation bridge decks are constituteed by prefabricated key groove plate and concrete.

As a further improvement of the structure, the top of the bridge abutment is provided with a limit wall and a support platform, the limit wall is arranged in the vertical direction, the support platform is arranged in the horizontal direction, an L-shaped installation position is formed between the limit wall and the support platform, the end part of the main beam is fixedly installed on the L-shaped installation position, the limit wall is provided with a rubber pad support, the side wall of the end part of the main beam is tightly attached to the rubber pad support and is fixed through bolts, the support platform is provided with a steel plate support, and the bottom wall of the end part of the main beam is tightly attached to the steel plate support and is fixed through bolts; the abutment further comprises an abutment bottom plate, and the abutment bottom plate are connected to form a vertical L-shaped structure for backfill covering; the bottom of the abutment bottom plate is provided with an anchor reinforcing steel bar.

As a further improvement of the structure, the prefabricated key groove plates are provided with sinking parts and protruding parts along the length direction of the prefabricated key groove plates, the prefabricated key groove plates are provided with a plurality of prefabricated key groove plates which are continuously paved on the main beam along the length direction of the main beam, the sinking parts and the protruding parts on the connected prefabricated key groove plates are sequentially and circularly arranged at intervals to form a wave-shaped bending structure, and concrete is poured on the connected prefabricated key groove plates to form a bridge deck.

The cable rack is provided with a plurality of cable racks, the cable racks are uniformly welded and fixed on the side surface of the main beam, and the outer ends of the cable racks are suspended outside to form a cantilever structure; the cable frame comprises a flat stay bar and an inclined stay bar, wherein the flat stay bar is horizontally arranged, the inclined stay bar is obliquely arranged and positioned below the flat stay bar, and the flat stay bar and the inclined stay bar are connected at the outer tail ends of the flat stay bar and the inclined stay bar to form a triangular support structure; and the tail end of the outer side of the flat stay rod is bent upwards to form a limit column.

As a further improvement of the structure, the bridge deck is provided with a preformed hole, and the preformed rail and the height limiting frame are arranged on the preformed hole and fixed by pouring concrete in the preformed hole.

The beneficial effects of the utility model are as follows: the utility model can fully utilize the old bridge gate and take the old bridge gate as a bridge pier to realize the construction of the light combined bridge, and has the characteristics of simple structure, environmental protection, low cost and short construction period. The bridge deck adopts the L-shaped buckling connection method of two sections of bridge decks to be combined with the limiting blocks on the main beams, so that the bridge deck has a certain front-back displacement space, the stress of the old bridge gate is not influenced when the bridge deck is displaced, the old bridge gate only needs to provide upward supporting force, when the bridge abutment is sunk due to geology, the bridge deck can also move obliquely along with the bridge deck, the bridge deck has a movable space, the bridge deck has small influence on the old bridge gate when moving, the bridge deck has a certain space and can remove stress, the old bridge gate is prevented from being damaged due to overlarge stress, the bridge deck and the integral safety of the old bridge gate are protected due to the stress, the structure of the old bridge gate is more stable, and the service life of the old bridge gate is effectively prolonged.

Drawings

FIG. 1 is a schematic perspective view of the light-duty composite bridge;

FIG. 2 is an enlarged partial view of portion A of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the abutment structure;

FIG. 4 is a schematic perspective view of the deck structure;

FIG. 5 is a schematic perspective view of the prefabricated key slot plate;

FIG. 6 is a schematic cross-sectional view of the pre-formed keyway plate;

FIG. 7 is a schematic view of a cable mount;

marking: the existing bridge gate 1, a bridge pier top supporting beam 11, a bridge abutment 2, a limit wall 21, a rubber pad support 211, a support platform 22, a steel plate support 221, a bridge abutment bottom plate 23, an anchor reinforcing steel bar 24, a main beam 3, a limit block 31, a secondary beam, a bridge deck 4, an L-shaped buckling 41, a prefabricated key groove plate 42, a sinking portion 421, a protruding portion 422, an inverted triangle groove 423, a flange 424, a hook 425, concrete 43, a reinforcing steel bar 44, a cable frame 5, a flat supporting rod 51, a limit column 511, an inclined supporting rod 52, a prefabricated railing 6, a height limiting frame 7 and a bridge frame 8.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and specific examples.

As shown in fig. 1 and 2, a light combined bridge reconstructed by using a old bridge gate comprises an old bridge gate 1, an i-steel beam, a bridge abutment 2, a main beam 3, a secondary beam, a bridge deck 4, a cable rack 5, a railing 6, a height limiting frame 7 and a bridge frame 8, wherein column reinforcements of the old bridge gate 1 extend at least 15cm, the reinforcements pass through reserved holes on the i-steel beam, so that the i-steel beam is arranged at the top of the old bridge gate 1, then the i-steel beam is covered by concrete to form a bridge pier top supporting beam 11, the main beam 3 and the secondary beam are both I-steel beams, the main beam 3 and the secondary beam are connected together through a backing plate and a bolt, the middle part of the main beam 3 is fixed on the bridge pier top supporting beam 11, a gap which can be used for small-amplitude displacement of the main beam 3 is reserved between the front and rear sides of the bridge abutment 11, the bridge abutment 2 is arranged at the front and rear sides of the old bridge gate 1, and the front and rear ends of the main beam 3 are erected on the bridge abutment 2 and fixed through bolts; the bridge deck 4 is arranged to be connected with the bridge deck 4 in two sections, the connection parts of the two sections of bridge decks 4 are connected by using L-shaped buckles 41, and gaps which can be used for small-amplitude displacement of the bridge deck 4 in front and back are reserved at the L-shaped buckles 41. The bridge deck 4 adopts the method that two sections bridge deck L shape lock 41 are connected, combines together with stopper 31 on the girder 3, makes bridge deck 4 have certain front and back displacement space, and can not influence the atress of old bridge brake 1 and pull when taking place the displacement, can prevent that old bridge brake 1 from atress too big causing the damage to protect bridge deck 4 and influence the whole safety of bridge because of its stress.

As shown in fig. 3, the abutment 2 includes a top limit wall 21, a support platform 22 and a bottom abutment floor 23. The limiting wall 21 is arranged in the vertical direction, and a rubber pad support 211 is arranged on the side wall of the limiting wall. The support platform 22 is disposed in a horizontal direction, and a steel plate support 221 is provided at the top thereof. An L-shaped installation position is formed between the limiting wall 21 and the support platform 22. The end of the girder 3 is provided with a screw hole, the end of the girder 3 is fixedly installed on the L-shaped installation position, specifically, the side wall of the end of the girder 3 is tightly attached to the rubber pad support 211 and is fixed through bolts, so as to limit the horizontal displacement generated to the girder 3 during the running brake, and the bottom wall of the end of the girder 3 is tightly attached to the steel plate support 221 and is fixed through bolts, so as to limit the vertical displacement of the girder 3. The abutment 2 is connected with the abutment bottom plate 23 to form a vertical L-shaped structure for backfill covering, and the bottom of the abutment bottom plate 23 is provided with an anchor bar 24, and the anti-overturning force is enhanced by the anchor bar 24, so that the length and thickness of the abutment bottom plate 23 can be reduced.

During construction of the bridge abutment 2 structure, firstly, 1-meter deep pits with the size of the surface of the bridge abutment bottom plate 23 are dug at corresponding positions on two sides of a bridge, a cushion layer with the thickness of 10cm of C20 concrete is poured on the bottom surface of the pits, reinforcing steel bars are arranged on the cushion layer, anchoring steel bars 24 are driven in, templates are erected, then concrete is poured on site to form the bridge abutment 2 structure, and finally backfill soil covering is carried out on the side of the vertical L-shaped structure between the bridge abutment 2 and the bridge abutment bottom plate 23.

As shown in fig. 4 and 5, each of the two bridge decks 4 is composed of a prefabricated key groove plate 42 and concrete 43, and the prefabricated key groove plate 42 is made of steel plates and is transported to a construction site for laying after being processed and produced in a factory. The pre-key groove plate 42 is provided with a depressed portion 421 and a protruding portion 422 along its length direction. The prefabricated key groove plates 42 are provided in plurality, and the plurality of prefabricated key groove plates 42 are continuously laid on the main beam 3 along the length direction of the main beam 3 and are fixed with the main beam 3 through bolts. The sunken parts 421 and the raised parts 422 on the connected prefabricated key groove plates 42 are sequentially and circularly arranged at intervals to form a wave-shaped bending structure, and the non-shrinkage steel fiber concrete 43 is poured on the connected prefabricated key groove plates 42 to form the concrete bridge deck 4. The arrangement of the sinking portion 421 and the protruding portion 422 of the prefabricated key groove plate 42 can ensure structural strength while reducing the weight of the prefabricated key groove plate 42, and the non-shrinkage steel fiber concrete 43 also has the characteristic of light weight, by which the light bridge deck 4 structure can be formed. The prefabricated key groove plate 42 can be used as a pouring template and a part of a bridge deck support body, the pouring template is not required to be removed after concrete pouring is completed, the time required for removing the pouring template is saved, meanwhile, the prefabricated key groove plate 42 can be transported to a construction site to be directly paved after factory processing and production, the setting time of the in-situ pouring template is saved, and the device has the characteristics of simplicity and convenience in operation and high efficiency, and can effectively accelerate the construction period progress. The sinkers 421 and the protrusions 422 on the plurality of prefabricated key groove plates 42 are sequentially and circularly arranged at intervals to form a wave-shaped bending structure, the structure can provide enough structural strength while reducing the weight of the prefabricated key groove plates 42, the span can be increased and the beam section can be reduced under the condition of ensuring the rigidity of the bridge deck 4, so that a box beam or a T-shaped beam is not required to be arranged at the lower part of the bridge deck 4, the height of the bridge bottom is not required to be reduced, and the trafficability under the bridge is effectively improved.

The boss 422 of the prefabricated key slot plate 42 has a trapezoidal boss structure, and an inverted triangle groove 423 is provided in the middle of the upper side of the boss 422. Two adjacent prefabricated key groove plates 42 are connected together at a sinking part 421, and the sinking part 421 connected together is of an inverted trapezoid sinking structure. The trapezoid structure of the protruding portion 422 and the sinking portion 421 and the inverted triangle groove 423 can increase the contact area between the prefabricated key groove plate 42 and the concrete bridge deck 4, so that the prefabricated key groove plate 42 and the concrete 43 are connected more tightly, and vibration and fine displacement of the bridge deck 4 are not easy to generate when a vehicle runs on the bridge deck 4.

As shown in fig. 6, in order to facilitate the connection between the prefabricated key groove plates 42, the following structure is adopted: the adjacent two prefabricated key groove plates 42 are respectively provided with a folded edge 424 and a hook 425 at the joint, and the adjacent two prefabricated key groove plates 42 are connected together through the arrangement of the folded edge 424 and the hook 425.

In order to secure the structural strength of the deck 4, before pouring, the reinforcing bars 44 are buried in the pouring position of the deck 4, the reinforcing bars 44 are buried at the top side of the deck 4 and the upper side of the sinking portion 421, and the structural strength of the deck 4 is reinforced by the reinforcing bars 44.

As shown in fig. 7, the cable frames 5 are fixed on the outer side of the main beam 3, the cable frames 5 on the same side are provided in plurality, and the plurality of cable frames 5 are uniformly distributed along the length direction of the main beam 3. The cable frame 5 all adopts steel construction, and the one end welding of cable frame 5 is on girder 3, and the other end is unsettled to set up in the outside and is made cable frame 5 form cantilever structure, forms cantilever type cable duct promptly, and the cable can be laid along this cantilever type cable duct, and this function need not to reform transform bridge original structure, and the cantilever setting does not influence bridge traffic space, has simple structure, and the practicality is strong, installs convenient characteristics. The cable rack 5 comprises a flat stay bar 51 and an inclined stay bar 52, wherein the flat stay bar 51 is horizontally arranged, the inclined stay bar 52 is obliquely arranged and positioned below the flat stay bar 51, the flat stay bar 51 and the inclined stay bar 52 are connected at the outer tail ends of the flat stay bar and the inclined stay bar to form a triangular support structure, and the structural strength and the bearing capacity of the cable rack 5 can be improved through the triangular support structure, so that the cable rack 5 is not easy to deform under stress. The cable is laid on the flat stay 51, and the outer end of the flat stay 51 is bent upward to form a stopper 511, and the stopper 511 is used to prevent the cable from falling.

Be provided with the preformed hole on the bridge floor 4, prefabricated railing 6 and limit for height frame 7 are installed on the preformed hole to fix through pouring concrete in the preformed hole, it is simple and convenient to install.

The bridge frame 8 adopts a double-span cross arch steel structure, is fixed on the main girder 3 and is penetrated on the bridge deck 4, the structure can transmit the stress of the middle part of the bridge frame 8 from the main arch to the secondary girders 3 at two ends and to the bridge decks 2 at two ends, so that the stress of the middle part of the bridge frame 8 is born by the secondary girders at the lower part of the bridge frame, and the main arch of the double-pair arch structure is transmitted to the bridge decks 2 at two ends, so that the stress is more reasonable.

The above embodiments are only for illustrating the present utility model, and are not to be construed as limiting the utility model in any way, and any person having ordinary skill in the art will realize that equivalent embodiments of partial changes and modifications can be made by using the disclosed technology without departing from the scope of the technical features of the present utility model.

Claims (5)

1. Utilize light-duty combination bridge that old bridge brake was reformed, its characterized in that: the bridge comprises a traditional bridge gate, an I-steel beam, a bridge abutment, a main beam, a secondary beam and a bridge deck, wherein post steel bars of the traditional bridge gate extend at least 15cm, the steel bars penetrate through reserved holes in the I-steel beam, so that the I-steel beam is installed at the top of the traditional bridge gate, then concrete is adopted to wrap and cover the I-steel beam to form a bridge pier top supporting beam, the main beam and the secondary beam are connected together through a backing plate and bolts, the middle part of the main beam is arranged on the bridge pier top supporting beam, limiting blocks are arranged at the front side and the rear side of the bridge pier top supporting beam at the bottom of the main beam, gaps for small-amplitude displacement of the front and rear sides of the main beam are reserved between the limiting blocks and the bridge pier top supporting beam, the bridge abutment is installed at the front side and the rear side of the bridge gate, and the front and rear ends of the main beam are erected on the bridge abutment and are fixed through bolts; the bridge deck is arranged to be connected with the bridge deck in two sections, the connection parts of the two sections of bridge decks are connected by using L-shaped buckling parts, and gaps which can be used for small-amplitude displacement of the bridge deck in front and back are reserved at the L-shaped buckling parts; the two bridge decks are composed of prefabricated key groove plates and concrete.

2. The lightweight composite bridge of claim 1, adapted with legacy bridge gates, wherein: the top of the bridge abutment is provided with a limiting wall and a support platform, the limiting wall is arranged in the vertical direction, the support platform is arranged in the horizontal direction, an L-shaped installation position is formed between the limiting wall and the support platform, the end part of the main beam is fixedly installed on the L-shaped installation position, the limiting wall is provided with a rubber pad support, the side wall of the end part of the main beam is tightly attached to the rubber pad support and is fixed through bolts, the support platform is provided with a steel plate support, and the bottom wall of the end part of the main beam is tightly attached to the steel plate support and is fixed through bolts; the abutment further comprises an abutment bottom plate, and the abutment bottom plate are connected to form a vertical L-shaped structure for backfill covering; the bottom of the abutment bottom plate is provided with an anchor reinforcing steel bar.

3. The lightweight composite bridge of claim 1, adapted with legacy bridge gates, wherein: the prefabricated key groove plates are provided with sinking parts and protruding parts along the length direction of the prefabricated key groove plates, the prefabricated key groove plates are provided with a plurality of key groove plates, the prefabricated key groove plates are continuously paved on the main beam along the length direction of the main beam, the sinking parts and the protruding parts on the connected prefabricated key groove plates are sequentially and circularly arranged at intervals to form a wave-shaped bending structure, and concrete is poured on the connected prefabricated key groove plates to form a bridge deck.

4. The lightweight composite bridge of claim 1, adapted with legacy bridge gates, wherein: the cable rack is provided with a plurality of cable racks, the cable racks are uniformly welded and fixed on the side face of the main beam, and the outer ends of the cable racks are arranged in a suspending manner outside to enable the cable racks to form a cantilever structure; the cable frame comprises a flat stay bar and an inclined stay bar, wherein the flat stay bar is horizontally arranged, the inclined stay bar is obliquely arranged and positioned below the flat stay bar, and the flat stay bar and the inclined stay bar are connected at the outer tail ends of the flat stay bar and the inclined stay bar to form a triangular support structure; and the tail end of the outer side of the flat stay rod is bent upwards to form a limit column.

5. The lightweight composite bridge of claim 1, adapted with legacy bridge gates, wherein: still including prefabricated railing and limit for height frame, be provided with the preformed hole on the bridge floor, prefabricated railing and limit for height frame are installed on the preformed hole to fix through pouring concrete in the preformed hole.

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