CN211278942U - Movable steel base of precast beam slab - Google Patents

Abstract

A prefabricated beam slab movable steel base relates to the technical field of bridge prefabricated beam slab production, the utility model relates to a rectangular steel structure, which comprises a bottom plate, a top plate, an upper layer connecting plate, a lower layer connecting plate and a connecting flange, wherein the upper layer connecting plate comprises an upper support seat I, an upper support seat II and an upper connecting plate; the connecting flanges are respectively fixedly welded at two ends of the upper-layer connecting plate. The utility model discloses the top surface is smooth-going, prevents that the base fracture from reaching and subsiding, and its bridge beam slab bottom surface is pleasing to the eye, makes things convenient for the bridge beam slab to dismantle at any time and assemble.

Description

Movable steel base of precast beam slab

Technical Field

The utility model belongs to the technical field of the precast beam board production technique of bridge and specifically relates to a precast beam board activity steel base.

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, can bear load without cracking, meets the requirement of changing sizes and quantities of different types of beam slabs, does not cause waste, ensures the quality of beam slab prefabrication to be qualified, has attractive appearance and shortens the construction period.

In order to realize the purpose, the steel base of the utility model is a rectangular steel structure and comprises a bottom plate, a top plate, an upper layer connecting plate, a lower layer connecting plate and a connecting flange, wherein the upper layer connecting plate comprises an upper support seat I, an upper support seat II and an upper connecting plate, and the lower layer connecting plate comprises a lower support 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 cover plate, and the 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.

Compared with the prior art, the utility model discloses length and width adjustment can be made according to different specification bridge beam slab sizes, fast switch over between the various beam slab construction tasks is realized. During the use, the utility model discloses the steel construction base can with bridge steel form rigid coupling, at the pouring bridge in-process, the vibrator is hung in the steel form outside, and intensity of vibrating can transmit on the combination formula bridge steel construction base, because it is rigid structure, forms resonance with the steel form, makes bridge beam slab concrete oscillation abundant, and the concrete compactness improves, and bridge beam slab's bulk strength obtains strengthening. 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 utility model discloses movable steel base top surface is smooth-going, can prevent effectively that the base from ftractureing and subsiding, and the bridge beam slab bottom surface that the pouring came out is pleasing to the eye, makes things convenient for the bridge beam slab to dismantle at any time and assemble, saves ground operating space, avoids the waste of 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 usage state 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 pipe, 11, a movable hoisting hole, 12, a side mold, 13 and a cover plate.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1, 2, 3 and 4, the steel base of the present invention is a rectangular steel structure, and includes a bottom plate 5, a top plate 6, upper and lower connecting plates, and a connecting flange 1, wherein the upper connecting plate includes a first upper supporting seat 2, a second upper supporting seat 7, and an upper connecting plate 8, and the lower connecting plate includes a lower supporting 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 detachable movable cover plate 13, and the cover plate 13 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 utility model has the steps of,

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 a lower support seat 4 through bolts by using movable cover plates 13, covering the movable hoisting holes when the beam plate is poured, and taking the bolts off to remove the movable 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 utility model discloses still can have other transform and modified embodiments, the utility model discloses only use the steel foundation of a 30 meters T roof beam as the demonstration, and be not limited to the concrete example of above-mentioned embodiment. The above embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

Claims (5)

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; a cover plate (13) is arranged on the movable hoisting hole (11), and the cover plate (13) 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.

Images