CN216586129U - Prefabricated assembled steel and concrete composite beam adopting contact surface of reinforcing beam - Google Patents
Prefabricated assembled steel and concrete composite beam adopting contact surface of reinforcing beam Download PDFInfo
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- CN216586129U CN216586129U CN202123180410.3U CN202123180410U CN216586129U CN 216586129 U CN216586129 U CN 216586129U CN 202123180410 U CN202123180410 U CN 202123180410U CN 216586129 U CN216586129 U CN 216586129U
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Abstract
The utility model relates to a prefabricated assembled steel and concrete composite beam adopting a contact surface of a reinforcing beam, which is characterized in that: the prefabricated I-beam upper flange plate comprises a prefabricated concrete bridge deck plate and a prefabricated I-beam, wherein a plurality of equal-thickness supporting steel bar blocks used for supporting the bottom surface of the prefabricated concrete bridge deck plate and a plurality of studs used for positioning the bottom surface of the prefabricated concrete bridge deck plate are fixed on the upper surface of the prefabricated I-beam upper flange plate, a preformed hole corresponding to the studs in matched mode is formed in the bottom surface of the prefabricated concrete bridge deck plate, a temporary supporting plastic thin plate is arranged on the side portion of the prefabricated I-beam upper flange plate, and a cast-in-place concrete layer is filled between the temporary supporting plastic thin plate, the upper surface of the prefabricated I-beam upper flange plate and the bottom surface of the prefabricated concrete bridge deck plate. The prefabricated steel and concrete composite beam for reinforcing the contact surface of the beam has reasonable design and high construction speed, and is favorable for ensuring the uniformity of the thickness of a cast-in-place concrete layer and the convenience of pouring.
Description
The technical field is as follows:
the utility model relates to a prefabricated assembled steel and concrete composite beam adopting a contact surface of a reinforcing beam.
The background art comprises the following steps:
the steel-concrete composite beam structure has the advantages of large bearing capacity, small cross section height, light self weight and the like, so the steel-concrete composite beam structure is widely adopted in the field of bridge structures and building structures, the cutting, the manufacturing and the like of materials of the prefabricated assembled composite beam are finished in factories, the site construction speed is high, and the quality is high; however, in the large-span steel-concrete continuous composite beam, there are hogging moment regions, and unfavorable states such as compression of the steel beam and tension of the concrete exist in the hogging moment regions, and in addition, the steel beam is exposed at the contact surface of the bridge deck and the steel beam due to the non-uniformity of the concrete material and the problem of pores, and effective corrosion prevention is difficult to achieve due to space limitation, resulting in a reduction in the strength of the structure.
The utility model content is as follows:
the utility model aims to provide a prefabricated steel and concrete composite beam adopting a contact surface of a reinforcing beam, which has the advantages of reasonable design, high construction speed and contribution to ensuring the uniformity of the thickness of a cast-in-place concrete layer and the convenience of pouring.
The technical scheme adopted by the utility model is as follows:
the utility model discloses a prefabricated steel and concrete composite beam with a reinforced beam contact surface, which is characterized in that: the prefabricated I-beam upper flange plate comprises a prefabricated concrete bridge deck plate and a prefabricated I-beam, wherein a plurality of equal-thickness supporting steel bar blocks used for supporting the bottom surface of the prefabricated concrete bridge deck plate and a plurality of studs used for positioning the bottom surface of the prefabricated concrete bridge deck plate are fixed on the upper surface of the prefabricated I-beam upper flange plate, a preformed hole corresponding to the studs in matched mode is formed in the bottom surface of the prefabricated concrete bridge deck plate, a temporary supporting plastic thin plate is arranged on the side portion of the prefabricated I-beam upper flange plate, and a cast-in-place concrete layer is filled between the temporary supporting plastic thin plate, the upper surface of the prefabricated I-beam upper flange plate and the bottom surface of the prefabricated concrete bridge deck plate.
Further, the cast-in-place concrete layer is a UHPC concrete layer.
Furthermore, the prefabricated concrete bridge deck is internally provided with a plurality of groups of longitudinal bars and stirrups.
Furthermore, the preformed hole is formed in the prefabricated concrete bridge deck plate in a penetrating mode through a plastic pipe, and the preformed hole is a counter bore formed in the bottom face of the prefabricated concrete bridge deck plate or a through hole formed in the whole thickness of the prefabricated concrete bridge deck plate in a penetrating mode.
Furthermore, the middle of the bottom surface of the prefabricated concrete bridge deck is provided with a trapezoidal lower boss, the preformed hole is formed in the lower boss, the supporting steel bar block is arranged on the bottom surface corresponding to the lower boss, and the two side parts of the temporary supporting plastic thin plate correspond to the inclined surfaces of the lower boss.
Furthermore, the temporary support plastic thin plate is a plastic plate in an obtuse angle form, one side of the plastic plate is fixed on the lower surface of the edge of the flange plate on the I-shaped steel, and the other side of the plastic plate is parallel to the inclined plane support of the lower boss of the prefabricated concrete bridge deck plate.
The utility model discloses a concrete construction method of a prefabricated assembled steel-concrete composite beam adopting a reinforced beam contact surface, which comprises the following steps:
1. prefabricating a concrete bridge deck 8 and I-shaped steel 6 on a prefabrication field according to the requirements of a design drawing, wherein the prefabricated concrete bridge deck 8 needs to be provided with longitudinal bars 7 and stirrups 4 and bound, reserving holes at the positions of the studs 5 on the bridge deck 8 by using plastic pipes with diameters larger than those of the studs, and then pouring, vibrating and curing common concrete;
2. welding an I-shaped steel beam 6 according to the design drawing requirement, welding studs 5 on the upper surface of an upper flange plate of the I-shaped steel beam 6, wherein one to three rows of 5-20 studs are arranged along the length direction of the beam, welding supporting steel bar blocks 1 at the positions of 1/4 and 3/4 of the beam length after the studs 5 are arranged, and the height of each supporting steel bar block 1 is consistent with the thickness of a cast-in-situ concrete layer 3 to be poured so as to ensure that the front and back thicknesses of the cast-in-situ concrete layer 3 are consistent and the bridge floor is horizontal;
3. hoisting a prefabricated concrete bridge deck 8 to the position above the I-shaped steel beam 6 through a crane, operating the crane to fall, simultaneously adjusting the position of a landing point of the bridge deck by the side face of a worker, aligning a reserved hole of the bridge deck with the position of the stud 5, slowly falling and inserting after completion, and avoiding the height reduction of the supporting steel bar block 1 and the bottom damage of the bridge deck caused by sudden load;
4. after the assembly is finished, a temporary supporting plastic plate 2 is installed, the temporary supporting plastic plate 2 is a plastic plate in an obtuse angle form, one side of the plastic plate is fixed on the lower surface of the edge of the flange plate of the upper flange of the I-steel, the other side of the plastic plate is parallel to the inclined plane bearing of the lower boss of the prefabricated concrete bridge deck plate, and meanwhile, a certain gap is reserved between the plastic plate 2 and the bottom surface of the bridge deck plate, so that the UHPC concrete layer can be conveniently poured in the later period;
5. after the temporary plastic formwork 2 is installed, a UHPC concrete layer is cast in place, UHPC is poured from one side of the temporary supporting plastic plate 2, when the other side reaches the design height, the pouring position is moved forwards, the UHPC concrete layer is vibrated continuously during pouring so as to achieve the compaction of the UHPC concrete layer, the UHPC is maintained after pouring, finally, the common concrete filling of the reserved holes of the studs 5 is carried out, and the concrete maintenance is carried out after the pouring is finished.
The technical advantages of the utility model are as follows:
(1) the integral structure consists of a bridge deck and an I-shaped steel beam, and the two parts can be carried out simultaneously, so that the construction speed is high;
(2) the supporting steel bar blocks are arranged, so that the uniformity of the thickness of the cast-in-place concrete layer and the convenience of pouring are ensured;
(3) the steel and the common concrete are integrally continued, and only a small amount of UHPC is used for reinforcement, so that the scheme has economical efficiency;
(4) the combined structure not only has good anticorrosion effect, but also improves the bearing capacity, rigidity and cracking load of the structure, reduces the number of cracks and can completely adapt to a humid environment.
Description of the drawings:
FIG. 1 is a schematic view of the front cross-sectional configuration of the present invention;
fig. 2 is a top view of fig. 1.
The specific implementation mode is as follows:
in order to make the aforementioned and other features and advantages of the utility model more comprehensible, embodiments accompanied with figures are described in detail below.
The prefabricated assembled steel and concrete composite beam adopting the reinforced beam contact surface comprises a prefabricated concrete bridge deck 8 and a prefabricated I-shaped steel beam 6, wherein the prefabricated concrete bridge deck 8 can be a cuboid or a trapezoidal lower boss 10 is arranged on the bottom surface of the cuboid.
The upper surface welding of prefabricated I-steel roof beam upper flange board, the riveting is fixed with a plurality of and is used for supporting equal thickness support reinforcing bar piece 1 and a plurality of and is used for fixing a position the peg 5 of prefabricated concrete decking bottom surface, equal thickness support reinforcing bar piece is used for guaranteeing the interval between prefabricated concrete decking 8 and the I-steel roof beam upper flange board upper surface, peg 5 and preformed hole 9 mating reaction, the relative position of prefabricated concrete decking 8 and prefabricated I-steel roof beam 6 of location.
The prefabricated Concrete bridge deck slab is characterized in that the bottom surface of the prefabricated Concrete bridge deck slab is provided with a preformed hole 9 correspondingly matched with a stud, the preformed hole 9 can be formed by a plastic pipe or a stainless steel pipe and the like arranged at a corresponding position, the side part of the prefabricated I-shaped steel beam upper flange plate is provided with a temporary supporting plastic thin plate 2, the temporary supporting plastic thin plate 2 can be made of plastic plates or wood plates and other materials, a cast-in-place Concrete layer 3 is filled between the upper surface of the temporary supporting plastic thin plate and the prefabricated I-shaped steel beam upper flange plate and the bottom surface of the prefabricated Concrete bridge deck slab, and the cast-in-place Concrete layer can be a UHPC Concrete layer, namely, the cast-in-place Concrete layer is formed by pouring UHPC materials (Ultra-High Performance Concrete, also called Reactive Powder Concrete (RPC).
Wherein have multiunit in the prefabricated concrete bridge deck and indulge muscle 7 and stirrup 4, violently indulge crisscross the formation steel reinforcement cage of tying up through indulging muscle 7 and stirrup 4, pour ordinary concrete and form prefabricated concrete bridge deck.
The preformed hole is formed in the prefabricated concrete bridge deck slab in a penetrating mode through the plastic pipe, the preformed hole is a counter bore formed in the bottom face of the prefabricated concrete bridge deck slab or a through hole formed in the whole thickness of the prefabricated concrete bridge deck slab in a penetrating mode, a through hole scheme is adopted, and ordinary concrete is poured into the preformed hole in the later stage to be filled.
The middle part of the bottom surface of the prefabricated concrete bridge deck slab is provided with a trapezoidal lower boss 10, the preformed hole 9 is arranged on the lower boss, the supporting steel bar block is arranged on the bottom surface corresponding to the lower boss, and two side parts of the temporary supporting plastic thin plate correspond to the inclined surfaces of the lower boss; the temporary supporting plastic thin plate is a plastic plate in an obtuse angle form, one side of the plastic plate is fixed on the lower surface of the edge of the flange plate on the I-shaped steel, and the other side of the plastic plate is parallel to the inclined plane bearing of the lower boss of the prefabricated concrete bridge deck plate.
The utility model discloses a concrete construction method of a prefabricated assembled steel-concrete composite beam adopting a reinforced beam contact surface, which comprises the following steps:
1. prefabricating a concrete bridge deck 8 and I-shaped steel 6 on a prefabrication field according to the requirements of a design drawing, wherein the prefabricated concrete bridge deck 8 needs to be provided with longitudinal bars 7 and stirrups 4 and bound, reserving holes at the positions of the studs 5 on the bridge deck 8 by using plastic pipes with diameters larger than those of the studs, and then pouring, vibrating and curing common concrete;
2. welding an I-shaped steel beam 6 according to the design drawing requirement, welding studs 5 on the upper surface of an upper flange plate of the I-shaped steel beam 6, wherein one to three rows of 5-20 studs are arranged along the length direction of the beam, welding supporting steel bar blocks 1 at the positions of 1/4 and 3/4 of the beam length after the studs 5 are arranged, and the height of each supporting steel bar block 1 is consistent with the thickness of a cast-in-situ concrete layer 3 to be poured so as to ensure that the front and back thicknesses of the cast-in-situ concrete layer 3 are consistent and the bridge floor is horizontal;
3. hoisting a prefabricated concrete bridge deck 8 to the position above the I-shaped steel beam 6 through a crane, operating the crane to fall, simultaneously adjusting the position of a landing point of the bridge deck by the side face of a worker, aligning a reserved hole of the bridge deck with the position of the stud 5, slowly falling and inserting after completion, and avoiding the height reduction of the supporting steel bar block 1 and the bottom damage of the bridge deck caused by sudden load;
4. after the assembly is finished, a temporary supporting plastic plate 2 is installed, the temporary supporting plastic plate 2 is a plastic plate in an obtuse angle form, one side of the plastic plate is fixed on the lower surface of the edge of the flange plate of the upper flange of the I-steel, the other side of the plastic plate is parallel to the inclined plane bearing of the lower boss of the prefabricated concrete bridge deck plate, and meanwhile, a certain gap is reserved between the plastic plate 2 and the bottom surface of the bridge deck plate, so that the UHPC concrete layer can be conveniently poured in the later period;
5. after the temporary plastic formwork 2 is installed, a UHPC concrete layer is cast in place, UHPC is poured from one side of the temporary supporting plastic plate 2, when the other side reaches the design height, the pouring position is moved forwards, the UHPC concrete layer is vibrated continuously during pouring so as to achieve the compaction of the UHPC concrete layer, the UHPC is maintained after pouring, finally, the common concrete filling of the reserved holes of the studs 5 is carried out, and the concrete maintenance is carried out after the pouring is finished.
The technical advantages of the utility model are as follows:
(1) the integral structure consists of a bridge deck and an I-shaped steel beam, and the two parts can be carried out simultaneously, so that the construction speed is high;
(2) the supporting steel bar blocks are arranged, so that the uniformity of the thickness of the cast-in-place concrete layer and the convenience of pouring are ensured;
(3) the steel and the common concrete are integrally continued, and only a small amount of UHPC is used for reinforcement, so that the scheme has economical efficiency;
(4) the combined structure not only has good anticorrosion effect, but also improves the bearing capacity, rigidity and cracking load of the structure, reduces the number of cracks and can completely adapt to a humid environment.
The advantage of pouring a layer of UHPC layer between decking and I-steel roof beam still has: (1) the UHPC has strong cohesiveness and rigidity, can effectively reduce the interface slippage phenomenon of the steel-concrete composite beam, improve the shearing-resistant bearing capacity of the cross section, reduce the cross-section dislocation generated by the slippage phenomenon and is beneficial to the integral stress of the structure; (2) compared with common concrete, the UHPC has very strong tensile property, the added UHPC layer can improve the bending resistance bearing capacity of the whole combined section, reduce the generation of cracks on the bridge deck and improve the service performance of the structure; (3) the UHPC layer almost completely wraps the steel-concrete composite beam for bearing, and the steel-concrete composite beam has a very wide flange plate, so that an obvious shear hysteresis phenomenon exists in a use stage, and a very large stress concentration phenomenon exists particularly in a bearing part, so that the rigidity of the UHPC layer is high, and the bearing part is protected from being damaged due to stress concentration; (4) the supporting steel bar blocks are arranged at the four-point positions of the I-shaped steel, so that the thickness of the UHPC layer can be accurately controlled, contact surface gaps and unevenness of the bridge deck plate caused by uneven thickness of the UHPC layer are prevented, and the supporting steel bar blocks also play a role in improving the shearing resistance of the structure and reducing the slippage of the contact surface; (5) the whole combination beam is prefabricated and assembled, so that conditions are created for pouring of the UHPC layer, the construction speed is high, and the effect is obvious; (6) although UHPC is relatively higher in manufacturing cost compared with common concrete, the contact position of the composite beam is small in coverage area and thin in thickness, so that the whole using amount is small, but the improvement effect on the corrosion resistance, the sliding resistance, the bearing performance and the service performance of the whole structure is obvious, so that the cost performance is high, and the UHPC is suitable for engineering popularization.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (6)
1. The utility model provides an adopt prefabricated assembled steel of reinforcing beam contact surface, thoughtlessly compound roof beam which characterized in that: the prefabricated I-beam upper flange plate comprises a prefabricated concrete bridge deck plate and a prefabricated I-beam, wherein a plurality of equal-thickness supporting steel bar blocks used for supporting the bottom surface of the prefabricated concrete bridge deck plate and a plurality of studs used for positioning the bottom surface of the prefabricated concrete bridge deck plate are fixed on the upper surface of the prefabricated I-beam upper flange plate, a preformed hole corresponding to the studs in matched mode is formed in the bottom surface of the prefabricated concrete bridge deck plate, a temporary supporting plastic thin plate is arranged on the side portion of the prefabricated I-beam upper flange plate, and a cast-in-place concrete layer is filled between the temporary supporting plastic thin plate, the upper surface of the prefabricated I-beam upper flange plate and the bottom surface of the prefabricated concrete bridge deck plate.
2. The precast assembled steel-concrete composite girder using a reinforcing beam contact surface according to claim 1, wherein: the cast-in-place concrete layer is a UHPC concrete layer.
3. The precast assembled steel-concrete composite girder using a reinforcing beam contact surface according to claim 1 or 2, wherein: and a plurality of groups of longitudinal bars and stirrups are arranged in the prefabricated concrete bridge deck.
4. The precast assembled steel-concrete composite girder using a reinforcing beam contact surface according to claim 3, wherein: the preformed hole is arranged in the prefabricated concrete bridge deck slab in a penetrating mode through a plastic pipe, and the preformed hole is a counter bore formed in the bottom face of the prefabricated concrete bridge deck slab or a through hole formed in the whole thickness of the prefabricated concrete bridge deck slab in a penetrating mode.
5. The precast assembled steel-concrete composite girder using a reinforcing beam contact surface according to claim 4, wherein: prefabricated concrete bridge deck slab bottom surface middle part has the lower boss that is trapezoidal shape, the preformed hole is established under on the boss, the support reinforcement piece is established on the bottom surface that corresponds with boss down, the both sides portion of strutting the plastic sheet temporarily is corresponding with the inclined plane of boss down.
6. The precast assembled steel-concrete composite girder using a reinforcing beam contact surface according to claim 5, wherein: the temporary supporting plastic thin plate is a plastic plate in an obtuse angle form, one side of the temporary supporting plastic thin plate is fixed on the lower surface of the edge of the flange plate on the I-shaped steel, and the other side of the temporary supporting plastic thin plate is parallel to the inclined plane bearing of the lower boss of the prefabricated concrete bridge deck plate.
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| CN202123180410.3U CN216586129U (en) | 2021-12-17 | 2021-12-17 | Prefabricated assembled steel and concrete composite beam adopting contact surface of reinforcing beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961327A (en) * | 2022-07-15 | 2022-08-30 | 山东大学 | H-shaped steel beam reinforcing system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961327A (en) * | 2022-07-15 | 2022-08-30 | 山东大学 | H-shaped steel beam reinforcing system and method |
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