CN111531684A - Prefabricated beam slab movable steel base and manufacturing method thereof - Google Patents
Prefabricated beam slab movable steel base and manufacturing method thereof Download PDFInfo
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- CN111531684A CN111531684A CN201911341755.7A CN201911341755A CN111531684A CN 111531684 A CN111531684 A CN 111531684A CN 201911341755 A CN201911341755 A CN 201911341755A CN 111531684 A CN111531684 A CN 111531684A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
- B28B7/0032—Moulding tables or similar mainly horizontal moulding surfaces
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a prefabricated beam slab movable steel base and a manufacturing method, and relates to the technical field of bridge prefabricated beam slab production, wherein the prefabricated beam slab movable steel base is of a rectangular steel structure and comprises a bottom plate, a top plate, an upper layer connecting plate, a lower layer connecting plate and connecting flanges, the upper layer connecting plate comprises an upper support seat I, an upper support seat II and an upper connecting plate, a plurality of lower support seats are uniformly and fixedly arranged on the bottom plate along the longitudinal direction of the steel base, three upper connecting plates are fixedly welded on the lower support seats along the longitudinal direction of the steel base, a plurality of groups of upper support seats I and upper support seats II are transversely welded between the three upper connecting plates, a side mold connecting circular tube is fixedly arranged between each group of support seats I and the upper support seat II, rubber tube reserved grooves are respectively arranged on two sides of the outer upper connecting plate, and the top; the connecting flanges are respectively fixedly welded at two ends of the upper-layer connecting plate. The top surface of the bridge beam plate is smooth, the base is prevented from cracking and settling, the bottom surface of the bridge beam plate is attractive, and the bridge beam plate is convenient to disassemble and assemble at any time.
Description
Technical Field
The invention relates to the technical field of bridge precast beam slab production, in particular to a precast beam slab movable steel base and a manufacturing method thereof.
Background
The prefabricated beam slab base is a bottom die for pouring prefabricated beam slab concrete, the bottom die not only requires high flatness but also can bear the weight of a beam slab in the production process, the stability is good, deviation cannot occur, the number of the prefabricated beam slab bases determines the production capacity of the beam slab, and the quality determines the appearance and the internal quality of the beam slab. In the existing beam slab prefabrication production, a beam slab base is formed by pouring concrete, a template is erected according to the size after a field is leveled, and the concrete is directly poured. The prior art has the following defects: firstly, because the concrete is poured manually, the top surface of the base is always uneven, so that the bottom surface of the poured beam slab is uneven, and the appearance is influenced; secondly, because the stress at the two ends is concentrated when the bridge is tensioned, the two ends of the concrete base are cracked and even sink, and the use times of the base are influenced: the bridge beam plates have various models, the beam plates with different lengths and widths need to be made into concrete bases of different types to be used as bottom moulds, a large number of concrete bases of different types need to be configured, and once the original beam plates are not produced, the corresponding concrete bases are abandoned and cannot be recycled, so that the resource waste of the concrete bases is caused, and the production cost is increased.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a prefabricated beam slab movable steel base and a manufacturing method thereof, so that the top surface of the base is flat and smooth, the base can bear load without cracking, the requirements of changing the sizes and the number of different types of beam slabs are met, waste is avoided, the quality of beam slab prefabrication is ensured to be qualified, the appearance is attractive, and the construction period is shortened.
In order to achieve the purpose, the steel base is of a rectangular steel structure and comprises a bottom plate, a top plate, an upper connecting plate, a lower connecting plate and a connecting flange, wherein the upper connecting plate comprises an upper supporting seat I, an upper supporting seat II and an upper connecting plate, and the lower connecting plate comprises a lower supporting seat; a plurality of lower supporting seats are uniformly and longitudinally fixed on the bottom plate along the steel base, three upper connecting plates are longitudinally welded and fixed on the lower supporting seats along the steel base, a plurality of groups of first upper supporting seats and second upper supporting seats are transversely welded and fixed among the three upper connecting plates, a side mold connecting circular pipe is fixedly arranged between the first supporting seat and the second upper supporting seat in each group, rubber pipe preformed grooves are respectively arranged on two sides of the upper connecting plate positioned on the outer side, and top plates are fixedly welded at the upper ends of the first upper supporting seat, the second upper supporting seat and the upper connecting plates; the connecting flanges are respectively fixedly welded at two ends of the upper-layer connecting plate.
Furthermore, movable hoisting holes are formed near two ends of the top plate, the distance between each movable hoisting hole and the end of the top plate is 1 meter, the depth of each movable hoisting hole is 20cm, and the width of each movable hoisting hole is 20 cm; the movable hoisting hole is provided with a movable cover plate, and the movable cover plate is connected with the lower support seat through bolts.
Furthermore, the connecting flange is provided with a threaded connecting hole.
Furthermore, a wear-resistant rubber pipe is arranged in the rubber pipe reserved groove.
Further, bottom plate, roof are 16mm thick steel sheet preparation, flange is 12mm thick steel sheet preparation, supporting seat one, last supporting seat two, upper junction plate, under bracing seat are 16# channel-section steel preparation.
A method for manufacturing a movable steel base of a precast beam slab comprises the following steps,
digging foundation pit
According to the specification requirement of a 30m beam plate, the excavation width of a foundation pit is 2 meters, the depth of the foundation pit is 1.5 meters, the excavation length of the foundation pit of a 30m beam-making beam pedestal is 35m, the width of the foundation pit is 2m, the foundation bearing capacity is detected after the foundation pit excavation is finished, and the foundation bearing capacity is not less than 200 kPa;
② binding of foundation reinforcing steel bars
The foundation steel bars are arranged on the lower layer of the foundation pit by adopting single-layer steel bar meshes with the spacing of 10cm, the steel bars are phi 12 thread steel bars, the longitudinal binding length is 34.8m, and the transverse binding width is 1.8 m;
construction of embedded parts
After the steel bars are bound, welding and fixing embedded parts, wherein the heights of the top surfaces of the embedded steel plates are consistent (the elevation deviation is controlled within 1 mm); the thickness of the embedded steel plate is 1.6cm, the length is 60cm, the width is 30cm, the transverse distance is 50cm, the longitudinal distance is 30cm, and the embedded steel plate is arranged on two sides;
fourthly, pouring concrete
The concrete adopts C30-grade concrete, the embedded steel plate cannot be trampled and impacted in the pouring process, and the top surface of the embedded steel plate is ensured to be level and level; after the concrete pouring is finished, the floating slurry can not cover the embedded steel plate;
fifthly, processing the steel base
Processing a steel structure according to the requirement of a 30m beam plate, dividing the length direction into 6 sections, wherein 4 sections with the length of 6 meters and 2 sections with the length of 4 meters are cut into movable hoisting holes with the depth of 20cm and the width of 20cm at the position 1 meter away from the end of each section with the length of 2 sections with the length of 6 meters, connecting the movable hoisting holes with lower support seats through movable cover plates through bolts, covering the movable hoisting holes when the beam plate is poured, and taking the bolts off to remove steel plates to serve as the hoisting holes of the hanging beam when the hanging beam is hung;
sixthly, mounting steel base
Welding and fixing a movable base on the embedded steel plate, measuring the height difference between a parabola and the steel base at the top of the embedded steel plate by using a level gauge, and adjusting by adding a welded steel plate; arranging a hard wear-resistant adhesive tape at a welding gap between the ground of the steel base and the embedded steel plate; 6-meter sections of two hoisting holes at two ends are longitudinally arranged in sequence, and then 2 sections of 6 meters are spliced, and the middle section is 2 sections of 4 meters; after the segments are connected through bolts, fine seams on the top surface are smoothed by putty, and then the fine seams are smoothed by a grinding machine; after the whole base is installed, the pre-camber and the flatness are measured again by the level gauge.
Compared with the prior art, the invention can adjust the length and the width according to the sizes of the bridge beam plates with different specifications, and realize the quick switching among various beam plate construction tasks. When the combined type bridge beam slab is used, the steel structure base can be rigidly connected with the bridge beam steel template, the vibrator is hung outside the steel template in the bridge pouring process, the vibration strength can be transmitted to the combined type bridge beam steel structure base, and the vibrator is of a rigid structure and forms resonance with the steel template, so that the concrete of the bridge beam slab is fully vibrated, the concrete compactness is improved, and the overall strength of the bridge beam slab is enhanced. Considering that resonance can produce the destruction to the welding point between steel base and the pre-buried steel sheet, so arranged the wear-resisting adhesive tape of stereoplasm in the clearance department between base and the pre-buried steel sheet, can guarantee base and steel mould resonance like this, can not make again a large amount of vibrations transmit on the pre-buried steel sheet. Meanwhile, the contact position of the side mold and the base is filled with the wear-resistant rubber pipe, so that the sealing performance of the template is improved, and the side surface of the poured beam plate cannot leak slurry. The movable steel base has smooth top surface, can effectively prevent the base from cracking and settling, has beautiful bottom surface of the poured bridge beam slab, is convenient for the bridge beam slab to be disassembled and assembled at any time, saves ground operation space and avoids the waste of the concrete base.
Drawings
FIG. 1 is a schematic diagram of the longitudinal structure of the present invention.
Fig. 2 is a transverse sectional view of fig. 1.
Fig. 3 is a schematic diagram of the structure of the movable hoisting hole in fig. 1.
Fig. 4 is a schematic view of the state of use of the present invention.
In the figure, 1, a connecting flange, 2, an upper supporting seat I, 3, a side mold connecting circular pipe, 4, a lower supporting seat, 5, a bottom plate, 6, a top plate, 7, an upper supporting seat II, 8, an upper connecting plate, 9, a rubber pipe preformed groove, 10, a wear-resistant rubber strip, 11, a movable hoisting hole, 12, a side mold, 13 and a cover plate.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1, 2, 3 and 4, the steel base of the invention is of a rectangular steel structure and comprises a bottom plate 5, a top plate 6, an upper layer connecting plate, a lower layer connecting plate and a connecting flange 1, wherein the upper layer connecting plate comprises an upper support seat I2, an upper support seat II 7 and an upper connecting plate 8, and the lower layer connecting plate comprises a lower support seat 4; a plurality of lower supporting seats 4 are uniformly and fixedly arranged on the bottom plate 5 along the longitudinal direction of the steel base, three upper connecting plates 8 are fixedly welded on the lower supporting seats 4 along the longitudinal direction of the steel base, a plurality of groups of first supporting seats 2 and second upper supporting seats 7 are transversely welded and fixed among the three upper connecting plates 8, a side mold connecting circular pipe 3 is fixedly arranged between each group of the first supporting seat 2 and the second upper supporting seat 7, rubber pipe reserved grooves 9 are respectively arranged on two sides of the upper connecting plate 8 positioned on the outer side, and top plates 6 are fixedly welded at the upper ends of the first upper supporting seat 2, the second upper supporting seat 7 and the upper connecting plates 8; the connecting flanges 1 are respectively fixedly welded at two ends of the upper-layer connecting plate.
Further, movable hoisting holes 11 are formed near two ends of the top plate 6, the distance between each movable hoisting hole 11 and the end of the top plate 6 is 1 meter, the depth of each movable hoisting hole 11 is 20cm, and the width of each movable hoisting hole is 20 cm; the movable hoisting hole 11 is provided with a movable cover plate which is connected with the lower support seat 4 through bolts.
Furthermore, the connecting flange 1 is provided with a threaded connecting hole.
Further, a wear-resistant rubber tube 10 is arranged in the rubber tube preformed groove 9.
Further, bottom plate 5, roof 6 are 16mm thick steel plate preparation, flange 1 is 12mm thick steel plate preparation, supporting seat 2, upper supporting seat two 7, upper junction plate 8, under bracing seat 4 are 16# channel-section steel preparation.
When in use, the method for manufacturing the movable steel base of the precast beam slab comprises the following steps,
digging foundation pit
According to the specification requirement of a 30m beam plate, the excavation width of a foundation pit is 2 meters, the depth of the foundation pit is 1.5 meters, the excavation length of the foundation pit of a 30m beam-making beam pedestal is 35m, the width of the foundation pit is 2m, the foundation bearing capacity is detected after the foundation pit excavation is finished, and the foundation bearing capacity is not less than 200 kPa;
② binding of foundation reinforcing steel bars
The foundation steel bars are arranged on the lower layer of the foundation pit by adopting single-layer steel bar meshes with the spacing of 10cm, the steel bars are phi 12 thread steel bars, the longitudinal binding length is 34.8m, and the transverse binding width is 1.8 m;
construction of embedded parts
After the steel bars are bound, welding and fixing embedded parts, wherein the heights of the top surfaces of the embedded steel plates are consistent (the elevation deviation is controlled within 1 mm); the thickness of the embedded steel plate is 1.6cm, the length is 60cm, the width is 30cm, the transverse distance is 50cm, the longitudinal distance is 30cm, and the embedded steel plate is arranged on two sides;
fourthly, pouring concrete
The concrete adopts C30-grade concrete, the embedded steel plate cannot be trampled and impacted in the pouring process, and the top surface of the embedded steel plate is ensured to be level and level; after the concrete pouring is finished, the floating slurry can not cover the embedded steel plate;
fifthly, processing the steel base
Processing a steel structure according to the requirement of a 30m beam plate, dividing the length direction into 6 sections, wherein 4 sections with the length of 6 meters and 2 sections with the length of 4 meters are cut into movable hoisting holes 11 with the depth of 20cm and the width of 20cm at the positions, 1 meter away from the end heads, of the 2 sections with the length of 6 meters, connecting the movable hoisting holes with lower support seats 4 through bolts by using movable cover plates 13, covering the movable hoisting holes when the beam plate is poured, and taking the bolts to remove the cover plates 13 when the beam is hung to serve as the hoisting holes of the beam; 5 cm-5 cm notches are cut in the middle of the 16 channel steel at intervals of 30cm and are used as channels of the bottom pull rod of the formwork.
Sixthly, mounting steel base
The movable base is welded and fixed on the embedded steel plate, and the 30-meter beam plate is provided with a reserved inverted arch, so that an inverted arch parabola cannot be made on the embedded steel plate, and the height difference between the parabola and the steel base is measured at the top of the embedded steel plate by a level gauge when the embedded steel plate is installed and is adjusted by adding and welding the steel plate; arranging a hard wear-resistant adhesive tape at a welding gap between the ground of the steel base and the embedded steel plate; 6-meter sections of two hoisting holes at two ends are longitudinally arranged in sequence, and then 2 sections of 6 meters are spliced, and the middle section is 2 sections of 4 meters; after the segments are connected through the bolts, fine seams on the top surface are smoothed by putty, and then the fine seams are smoothed by a grinding machine. After the whole base is installed, the pre-camber and the flatness are measured again by the level gauge.
The invention may also have other variants and modifications, which are exemplified by a steel foundation of a 30m T-beam only and are not limited to the specific examples of the above embodiments. The above examples are intended to be illustrative of the present invention and are not intended to be limiting.
Claims (6)
1. A prefabricated beam slab movable steel base is characterized in that the steel base is of a rectangular steel structure and comprises a bottom plate (5), a top plate (6), an upper layer connecting plate, a lower layer connecting plate and a connecting flange (1), wherein the upper layer connecting plate comprises an upper supporting seat I (2), an upper supporting seat II (7) and an upper connecting plate (8), and the lower layer connecting plate comprises a lower supporting seat (4); a plurality of lower supporting seats (4) are uniformly and longitudinally fixed on the bottom plate (5) along the steel base, three upper connecting plates (8) are longitudinally welded and fixed on the lower supporting seats (4) along the steel base, a plurality of first upper supporting seats (2) and second upper supporting seats (7) are transversely welded and fixed between the three upper connecting plates (8), a side-form connecting circular tube (3) is fixedly arranged between the first supporting seat (2) and the second upper supporting seat (7) in each group, rubber tube preformed grooves (9) are respectively arranged on two sides of the upper connecting plate (8) positioned on the outer side, and a top plate (6) is fixedly welded at the upper ends of the first upper supporting seat (2), the second upper supporting seat (7) and the upper connecting plate (8); the connecting flanges (1) are respectively fixedly welded at two ends of the upper-layer connecting plate.
2. The precast beam slab movable steel base according to claim 1, wherein movable hoisting holes (11) are formed near two ends of the top plate (6), the distance between each movable hoisting hole (11) and the end of the top plate (6) is 1m, and the depth and the width of each movable hoisting hole (11) are 20cm and 20cm respectively; the movable hoisting hole (11) is provided with a movable cover plate, and the movable cover plate is connected with the lower supporting seat (4) through bolts.
3. The precast beam slab movable steel base according to claim 1, wherein the connecting flange (1) is provided with a threaded connecting hole.
4. The precast beam slab movable steel base according to claim 1, characterized in that a wear-resistant rubber pipe (10) is arranged in the rubber pipe preformed groove (9).
5. The precast beam slab movable steel base as claimed in claim 1, wherein the bottom plate (5) and the top plate (6) are made of 16mm thick steel plates, the connecting flange (1) is made of 12mm thick steel plates, and the first supporting seat (2), the second upper supporting seat (7), the upper connecting plate (8) and the lower supporting seat (4) are made of 16# channel steel.
6. A method for manufacturing a movable steel base of a precast beam slab comprises the following steps,
digging foundation pit
According to the specification requirement of a 30m beam plate, the excavation width of a foundation pit is 2 meters, the depth of the foundation pit is 1.5 meters, the excavation length of the foundation pit of a 30m beam-making beam pedestal is 35m, the width of the foundation pit is 2m, the foundation bearing capacity is detected after the foundation pit excavation is finished, and the foundation bearing capacity is not less than 200 kPa;
② binding of foundation reinforcing steel bars
The foundation steel bars are arranged on the lower layer of the foundation pit by adopting single-layer steel bar meshes with the spacing of 10cm, the steel bars are phi 12 thread steel bars, the longitudinal binding length is 34.8m, and the transverse binding width is 1.8 m;
construction of embedded parts
After the steel bars are bound, welding and fixing embedded parts, wherein the heights of the top surfaces of the embedded steel plates are consistent (the elevation deviation is controlled within 1 mm); the thickness of the embedded steel plate is 1.6cm, the length is 60cm, the width is 30cm, the transverse distance is 50cm, the longitudinal distance is 30cm, and the embedded steel plate is arranged on two sides;
fourthly, pouring concrete
The concrete adopts C30-grade concrete, the embedded steel plate cannot be trampled and impacted in the pouring process, and the top surface of the embedded steel plate is ensured to be level and level; after the concrete pouring is finished, the floating slurry can not cover the embedded steel plate;
fifthly, processing the steel base
Processing a steel structure according to the requirement of a 30m beam plate, dividing the length direction into 6 sections, wherein 4 sections with the length of 6 meters and 2 sections with the length of 4 meters are cut into movable hoisting holes (11) with the depth of 20cm and the width of 20cm at the position 1 meter away from the end of each section with the length of 2 sections with the length of 6 meters, connecting the movable hoisting holes with a lower support seat (4) through bolts by using movable cover plates, covering the movable hoisting holes when the beam plate is poured, and removing steel plates by taking the bolts when the beam is hung to serve as the hoisting holes of the beam;
sixthly, mounting steel base
Welding and fixing a movable base on the embedded steel plate, measuring the height difference between a parabola and the steel base at the top of the embedded steel plate by using a level gauge, and adjusting by adding a welded steel plate; arranging a hard wear-resistant adhesive tape at a welding gap between the ground of the steel base and the embedded steel plate; 6-meter sections of two hoisting holes at two ends are longitudinally arranged in sequence, and then 2 sections of 6 meters are spliced, and the middle section is 2 sections of 4 meters; after the segments are connected through bolts, fine seams on the top surface are smoothed by putty, and then the fine seams are smoothed by a grinding machine; after the whole base is installed, the pre-camber and the flatness are measured again by the level gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911341755.7A CN111531684A (en) | 2019-12-24 | 2019-12-24 | Prefabricated beam slab movable steel base and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911341755.7A CN111531684A (en) | 2019-12-24 | 2019-12-24 | Prefabricated beam slab movable steel base and manufacturing method thereof |
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| CN111531684A true CN111531684A (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911341755.7A Withdrawn CN111531684A (en) | 2019-12-24 | 2019-12-24 | Prefabricated beam slab movable steel base and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852037A (en) * | 2020-07-07 | 2020-10-30 | 中交二航局第四工程有限公司 | Construction method of short-line method section beam prefabrication whole plant |
| CN112077985A (en) * | 2020-09-03 | 2020-12-15 | 中交一公局集团有限公司 | Precast beam base reinforcing sealing device |
-
2019
- 2019-12-24 CN CN201911341755.7A patent/CN111531684A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852037A (en) * | 2020-07-07 | 2020-10-30 | 中交二航局第四工程有限公司 | Construction method of short-line method section beam prefabrication whole plant |
| CN112077985A (en) * | 2020-09-03 | 2020-12-15 | 中交一公局集团有限公司 | Precast beam base reinforcing sealing device |
| CN112077985B (en) * | 2020-09-03 | 2024-04-26 | 中交一公局集团有限公司 | Reinforcing sealing device for precast beam base |
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Application publication date: 20200814 |