CN221276301U - Prefabricated concrete beam slab and steel structure pier combination keep-through bridge - Google Patents

Abstract

The application relates to a precast concrete beam slab and steel structure pier combination bridge that keeps open, which relates to the technical field of bridge that keeps open, and comprises a plurality of groups of piers, precast slabs and a plurality of groups of precast slabs which are connected along the longitudinal direction of the bridge and form a continuous bridge deck, wherein the bridge deck is cast in situ with a concrete pavement layer, and the piers comprise: a plurality of pile foundations and a capping beam. According to the application, a plurality of pile foundations are inserted into the ground, two adjacent pile foundations are connected together through the connecting frame, the bent cap is fixedly arranged on the pile foundations, gravel is filled in the pile foundations, concrete is poured in a certain height range at the top of the pile foundations, the reinforcing bars are connected with the bent cap, so that a group of bridge piers are formed, precast slabs are fixedly arranged on the two adjacent bridge piers, a plurality of groups of precast slabs are connected along the longitudinal direction of the bridge to form a continuous bridge deck, then a concrete surface layer and an asphalt road layer are cast in place on the bridge deck, and finally, the construction of a bridge is realized.

Description

Prefabricated concrete beam slab and steel structure pier combination keep-through bridge

Technical Field

The application relates to the technical field of bridge protection, in particular to a prefabricated concrete beam slab and steel structure pier combined bridge protection.

Background

In the expressway reconstruction and expansion engineering, bridge and culvert are required to be dismantled and reconstructed, and reaming and widening are required to be utilized, so that reconstruction and expansion construction is required under the condition that normal traffic of vehicles is ensured. The bridge and culvert reconstruction through hole enlarging and removing are carried out by constructing a channel protection path and setting up a bridge to be protected, the bridge to be protected belongs to temporary engineering, and the bridge to be protected is removed after the reconstruction of the main line bridge is completed and operated, so that the bridge to be protected is selected in comparison with the bridge to be protected in terms of comprehensive construction difficulty, economic cost, environmental protection and the like on the premise of ensuring safety and smooth traffic of vehicles, and the most suitable bridge to be protected is adopted by combining geographic and hydrologic conditions.

The common structural form of the current keep-alive bridge is mainly a steel trestle, wherein a main beam of the steel trestle adopts large and medium-size I-steel, a distribution beam and a small longitudinal beam on the main beam adopt small-size I-steel, and a bridge deck adopts 10-12 mm thick pattern steel plates; the lower bridge pier adopts a steel pipe pile column, the top of the pile column adopts I-steel or H-steel as a capping beam, and the bridge abutment adopts a concrete column bridge abutment or a steel pipe pile to be connected with a concrete capping beam.

The section steel trestle is steel member, and it is convenient to assemble construction, practices thrift the time limit for a project, but material recycle practices thrift the cost. The single-hole span is generally not more than 12m, the driving speed is low, the driving comfort is poor, the noise is high, the quality of the road and bridge connecting part is uncontrollable, and the road and bridge connecting part is easy to damage.

Disclosure of utility model

In order to ensure the safety, reliability, environmental protection and economy of the bridge, the application provides a prefabricated concrete beam slab and steel structure pier combined bridge.

The application provides a prefabricated concrete beam slab and steel structure pier combined keep-through bridge, which adopts the following technical scheme:

The utility model provides a precast concrete beam slab and steel construction pier combination keep-alive bridge, includes along the vertical interval of bridge multiunit pier that sets up, two adjacent groups be provided with prefabricated plate, multiunit on the pier the prefabricated plate links to each other and forms continuous bridge floor along the bridge longitudinal direction cast-in-situ has concrete pavement layer on the bridge floor, the pier includes:

the pile foundations are vertically inserted into the ground at intervals along the transverse direction of the bridge, and are hollow steel pipes;

the bent cap, the bent cap sets up on the top of a plurality of pile foundations and supports the prefabricated plate, the bent cap is two H shaped steel of piecing together.

Through adopting above-mentioned technical scheme, a set of pier has been constituteed to a plurality of pile foundations and bent cap, and multiunit pier sets up along the bridge longitudinal interval, and prefabricated plate fixed mounting is on two adjacent sets of piers, and multiunit prefabricated plate links to each other into continuous bridge floor along bridge longitudinal direction, and cast-in-situ builds one deck concrete pavement layer on the bridge floor that the prefabricated plate constitutes at last, and road bridge junction quality is controllable, has reduced the probability that appears the damage, and most materials are recoverable when dismantling the guarantor's bridge in the later stage simultaneously to guarantee to lead to bridge safe and reliable and environmental protection economy.

Further, the bridge pier is divided into double-row piles and single-row piles according to the row number of the longitudinal pile foundations, a plurality of expansion joints are arranged on the bridge, the bridge piers at the expansion joints are double-row piles, and the other bridge piers are single-row piles.

Through adopting above-mentioned technical scheme, bridge expansion joint department receives longitudinal deformation stress easily, and bridge expansion joint department's pier is the double row stake, has improved bridge expansion joint department's intensity, and other positions mainly receive the pressure of the vertical direction of bridge, support through single row stake to this realizes guaranteeing bridge safe and reliable and reduce cost as far as possible.

Further, the pile foundation top inserts in the bent cap, the inside gravel that has filled of pile foundation, the concrete is pour and the reinforcement is connected with the bent cap in the certain altitude range in pile foundation top.

Through adopting above-mentioned technical scheme, full gravel in steel pipe pile foundation has improved the intensity of pile foundation, makes the connection between pile foundation and the bent cap more firm through concrete and arrangement of reinforcement simultaneously to this guarantees bridge safe and reliable.

Further, be provided with a plurality of link between a plurality of pile foundations of bridge horizontal, the link is used for connecting two adjacent pile foundations and fixes and support the pile foundation.

Through adopting above-mentioned technical scheme, connect into a whole between a plurality of pile foundations of bridge horizontal with a plurality of link, the link is connected fixedly and is supported two adjacent pile foundations simultaneously to this stability that has improved the pile foundation has guaranteed the safe and reliable of bridge.

Further, guard plates are arranged on two lateral sides of the bridge pier and used for supporting and fixing precast slabs on two lateral sides of the bridge.

Through adopting above-mentioned technical scheme, support fixedly to the prefabricated plate through the backplate on pier both sides edge, prevent that the prefabricated plate from sliding along bridge transverse direction, guaranteed the safe and reliable of bridge.

Further, the pier abutment is provided with a plurality of groups of circular plate type rubber supports, and the plurality of groups of circular plate type rubber supports are used for buffering and supporting the precast slabs.

Through adopting above-mentioned technical scheme, the prefabricated plate passes through circular plate formula rubber support and is connected with pier abutment, and when vertical position change takes place for prefabricated plate and pier abutment, rubber support carries out buffer support to the prefabricated plate to this has guaranteed the safe and reliable of bridge.

Further, the cross slope of the bridge is of a structure with high middle and low two sides, and the cross slope of the bridge is used for guaranteeing that the vehicle normally runs and discharging accumulated water out of the bridge deck.

Through adopting above-mentioned technical scheme, ponding on the cross slope of bridge flows to both ends respectively from the centre, then discharges through the drain pipe, and inclination is lower simultaneously, has guaranteed that the vehicle can normally travel to this realizes carrying out timely drainage to the bridge floor.

Further, be provided with ribbed steel bar welded mesh in the concrete pavement layer, still be provided with the pitch layer on the concrete pavement layer.

Through adopting above-mentioned technical scheme, ribbed steel bar welded net is used for improving concrete layer's intensity, lays the asphalt layer on concrete pavement layer simultaneously, has improved the aggregate for paving and has resisted driving and natural factor to the ability of road surface harm, makes the road surface level and smooth little dirt, waterproof, durable.

Further, be provided with first guardrail outside the bridge and be located on the pitch layer, bridge central authorities median department and be located on the pitch layer and be provided with the second guardrail.

Through adopting above-mentioned technical scheme, first guardrail is used for blockking the vehicle and washes out the bridge, and first guardrail climbs the bank anticollision barrier for the area, and the second guardrail is used for blockking the vehicle on both sides and gets into the retrograde canal, and the second guardrail is anticollision barrier to this guarantees the safety of vehicle on the bridge.

Further, the precast slab adopts a reinforced concrete simply supported hollow slab.

Through adopting above-mentioned technical scheme, reduced the weight of prefabricated plate when guaranteeing prefabricated plate intensity, alleviateed the effort of road surface to the pier to this guarantees bridge safe and reliable.

In summary, the application has the following beneficial technical effects:

Through inserting a plurality of pile foundations on the ground, then link together two adjacent pile foundations through the link, with bent cap fixed mounting on the pile foundation, and full of the gravel in pile foundation inside, pour concrete and join in marriage the muscle and be connected with the bent cap in pile foundation top certain altitude range, constitute a set of pier with this, with prefabricated plate fixed mounting on two adjacent piers, multiunit prefabricated plate links to each other and forms continuous bridge floor along bridge longitudinal direction, then cast in situ concrete surface course and pitch road layer on the bridge floor, finally realize the construction of keeping bridge, but material all recycle when dismantling the keeping bridge simultaneously, so as to guarantee that the keeping bridge is safe and reliable and environmental protection economy.

Drawings

FIG. 1 is a schematic diagram of the structure of the present application;

FIG. 2 is a side view of the present application;

Fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Reference numerals: 1. bridge piers; 11. pile foundation; 111. a connecting frame; 12. a capping beam; 13. double row piles; 14. single row piles; 2. a guard board; 3. a rubber support; 4. a prefabricated plate; 5. a concrete pavement layer; 6. an asphalt layer; 7. a first guardrail; 8. and a second guardrail.

Detailed Description

The application is described in further detail below with reference to fig. 1-3.

The embodiment of the application discloses a prefabricated concrete beam slab and steel structure abutment combined bridge.

Referring to fig. 1 and 2, a prefabricated concrete beam slab and steel structure pier combination keep-through bridge comprises a plurality of groups of piers 1 arranged at intervals along the longitudinal direction of the bridge, precast slabs 4 are arranged on two adjacent groups of piers 1, the precast slabs 4 are connected along the longitudinal direction of the bridge and form a continuous bridge deck, and a concrete pavement layer 5 is cast-in-situ on the bridge deck.

Referring to fig. 1 and 2, a pier 1 includes a plurality of piles 11 and cap beams 12, the piles 11 are inserted into the ground at intervals along the transverse direction of the bridge, and the piles 11 are hollow steel pipes; during installation, DZJ < 120 > vibrating hammers are selected to install the pile foundations 11, and meanwhile, the installation quality of the pile foundations 11 is strictly controlled, so that the central shafts of the pile foundations 11 are kept on the same straight line; a connecting frame 111 is fixedly arranged between two adjacent pile foundations 11, the connecting frame 111 is used for fixedly connecting the two adjacent pile foundations 11, meanwhile, the connecting frame 111 is used for fixing and supporting the two adjacent pile foundations 11, and a plurality of pile foundations 11 are connected into a whole through a plurality of connecting frames 111, so that the stability of the pile foundations 11 is improved, and the safety and reliability of a bridge are ensured; after the pile foundation 11 is fixed, filling gravel into the pile foundation 11, pouring concrete in a certain height range at the top of the pile foundation 11, and installing reinforcing bars; the pile foundations 11 of the embodiment adopt phi 820 multiplied by 10mm steel pipe piles, 8 pile foundations 11 are transversely arranged at intervals on the pier 1, the center distance between every two adjacent pile foundations 11 is 2700mm, and concrete is poured in the height range of 100cm at the top of each pile foundation 11.

Referring to fig. 1 and 2, a capping beam 12 is fixedly installed on top ends of a plurality of pile foundations 11, the capping beam 12 supports the precast slabs 4, the capping beam 12 is made of double-spliced H-shaped steel, the pile foundations 11 are inserted into the capping beam 12 and are fixedly connected with reinforcing bars, and the pile foundations 11 in the embodiment are inserted into the capping beam 12 for 10cm; the bridge transverse slope is of a structure with high middle and low two sides, the transverse slope is formed by bending top cover beams 12, and the height of the cover beams 12 is adjusted by a filler stone; the bridge transverse slope is used for discharging accumulated water out of the bridge deck while ensuring normal running of the vehicle, the gradient of the bridge transverse slope is 1 degree, and the capping beam 12 adopts double-spliced H588 multiplied by 300 multiplied by 12 multiplied by 20mm steel capping beams 12.

Referring to fig. 1, a plurality of expansion joints are provided on a bridge to meet the requirements of bridge deck deformation, the expansion joints being used to adjust the displacement and coupling between the superstructure caused by vehicle loads and bridge construction materials; the bridge piers 1 are divided into double-row piles 13 and single-row piles 14 according to the row number of the longitudinal pile foundations 11, the bridge piers 1 at the expansion joints are the double-row piles 13, and the rest bridge piers 1 are the single-row piles 14; the double-row piles 13 are longitudinally formed by two rows of identical pile foundations 11 along the bridge, connecting frames 111 are fixedly arranged between the two rows of pile foundations 11, connecting frames 111 are fixedly arranged between each pile foundation 11 and the adjacent pile foundations 11, and the bent caps 12 are fixedly arranged at the middle positions of the two rows of pile foundations 11 in the longitudinal direction; the single-row piles 14 are longitudinally formed by a row of pile foundations 11 along the bridge, and the bent cap 12 is fixedly arranged at the middle position of the row of pile foundations 11; in this embodiment, the center distance between two rows of pile foundations 11 is 2500mm.

Referring to fig. 1 and 3, guard plates 2 are fixedly mounted on two lateral sides of a bridge pier 1, the guard plates 2 are fixed on a capping beam 12, the guard plates 2 are used for supporting and fixing bottoms and side walls of precast slabs 4 on two lateral sides of a bridge, and a plurality of groups of circular plate type rubber supports 3 are fixedly mounted at the bridge pier 1; the precast slabs 4 are reinforced concrete simply supported hollow slabs, the precast slabs 4 are placed on two adjacent groups of bridge piers 1 and are propped against the circular plate type rubber support 3, the circular plate type rubber support 3 is used for buffering and supporting the precast slabs 4, a plurality of precast slabs 4 are fixedly installed along the transverse direction of a bridge, and a plurality of precast slabs 4 are positioned between two side guard plates 2 and are tightly connected; the groups of precast slabs 4 are connected along the longitudinal direction of the bridge and form a continuous bridge deck.

Referring to fig. 1 and 2, a ribbed welding net is fixedly installed on a precast slab 4, then a concrete pavement layer 5 is cast in situ on a bridge deck formed by the precast slabs 4, and an asphalt layer 6 is paved after the concrete pavement layer 5 is solidified, so that the capability of granules for paving to resist damage to the pavement caused by travelling and natural factors is improved, and the pavement is flat, less in dust, waterproof and durable; the thickness of the cast-in-place concrete pavement layer 5 of this embodiment is 10cm.

Referring to fig. 1 and 2, the outside fixed mounting on bridge road surface has first guardrail 7, and first guardrail 7 climbs the bank anticollision barrier for the area, and bridge central authorities dividing strip department fixed mounting has second guardrail 8, and second guardrail 8 is anticollision barrier, through the combined action of first guardrail 7 and second guardrail 8, has guaranteed the safety of the vehicle on the bridge.

With reference to fig. 1 and 2, through the above mode, the temporary bridge can meet the design speed of 80km/h, and simultaneously greatly improve the travelling comfort and safety, and is environment-friendly and economical; meanwhile, after the construction of the main bridge is completed, the bridge needs to be dismantled, the road surface is cut by a rope saw, the asphalt layer 6 can be reused, the cut precast slabs 4 and the concrete pavement layer 5 can be used for bridge construction of local roads, the lower part structure of the bridge is the combination of pile foundations 11 and cap beams 12, the pile foundations 11 and the cap beams 12 are all made of steel materials, and all the removed bridge can be recycled, so that the safety, reliability, environmental protection and economy of the bridge are ensured.

The working principle of the embodiment of the application is as follows:

Inserting a plurality of pile foundations 11 into the ground, connecting two adjacent pile foundations 11 together through a connecting frame 111, fixedly installing a bent cap 12 on the pile foundations 11, filling gravel in the pile foundations 11, pouring concrete in a certain height range at the tops of the pile foundations 11, distributing ribs and connecting the bent cap 12, so as to form a group of bridge piers 1, fixedly installing precast slabs 4 on the two adjacent bridge piers 1, connecting a plurality of groups of precast slabs 4 along the longitudinal direction of a bridge to form a continuous bridge deck, and then casting a concrete surface layer and an asphalt road layer on the bridge deck, so that the construction of a bridge is finally realized, and meanwhile, when the bridge is required to be dismantled, materials can be recycled, so that the bridge is ensured to be safe, reliable, environment-friendly and economical.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. A precast concrete beam slab and steel construction pier combination keep-through bridge, its characterized in that: including along bridge vertical direction interval multiunit pier (1), two adjacent groups be provided with prefabricated plate (4), multiunit on pier (1) prefabricated plate (4) link to each other and form continuous bridge floor along bridge vertical direction cast-in-situ has concrete pavement layer (5) on the bridge floor, pier (1) include:

The pile foundations (11) are vertically inserted into the ground at intervals along the transverse direction of the bridge, and the pile foundations (11) are hollow steel pipes;

The bent cap (12), bent cap (12) set up on the top of a plurality of pile foundations (11) and support prefabricated plate (4), bent cap (12) are two pieces of H shaped steel.

2. The precast concrete deck and steel structure pier combination bridge of claim 1, wherein: the bridge pier (1) is divided into double piles (13) and single piles (14) according to the row number of the longitudinal pile foundations (11), a plurality of expansion joints are arranged on the bridge, the bridge piers (1) at the expansion joints are the double piles (13), and the rest bridge piers (1) are the single piles (14).

3. The precast concrete deck and steel structure pier combination bridge of claim 1, wherein: the pile foundation (11) top inserts in bent cap (12), gravel has been filled in pile foundation (11) inside, concrete is pour and reinforcement and bent cap (12) are connected in certain altitude range in pile foundation (11) top.

4. The precast concrete deck and steel structure pier combination keep-through bridge according to claim 2, wherein: a plurality of connecting frames (111) are arranged among a plurality of pile foundations (11) in the transverse direction of the bridge, and the connecting frames (111) are used for connecting two adjacent pile foundations (11) and fixing and supporting the pile foundations (11).

5. The precast concrete deck and steel structure pier combination bridge of claim 1, wherein: guard plates (2) are arranged on two lateral sides of the bridge pier (1), and the guard plates (2) are used for supporting and fixing precast slabs (4) on two lateral sides of the bridge.

6. The precast concrete deck and steel structure pier combination bridge of claim 1, wherein: the bridge pier (1) abutment is provided with a plurality of groups of circular plate type rubber supports (3), and the plurality of groups of circular plate type rubber supports (3) are used for buffering and supporting the precast slabs (4).

7. The precast concrete deck and steel structure pier combination bridge of claim 1, wherein: the cross slope of the bridge is of a structure with high middle and low two sides, and the cross slope of the bridge is used for guaranteeing that the vehicle normally runs and discharging accumulated water out of the bridge deck.

8. The precast concrete deck and steel structure pier combination bridge of claim 1, wherein: ribbed steel bar welded mesh is arranged in the concrete pavement layer (5), and an asphalt layer (6) is further arranged on the concrete pavement layer (5).

9. The precast concrete deck and steel structure pier combination bridge of claim 8, wherein: the bridge is provided with a first guardrail (7) outside and on the asphalt layer (6), and a second guardrail (8) is arranged at the central separation zone of the bridge and on the asphalt layer (6).

10. The precast concrete deck and steel structure pier combination bridge of claim 1, wherein: the precast slab (4) adopts a reinforced concrete simply supported hollow slab.