CN111890549A - Rack for binding prefabricated box girder bottom plate web steel reinforcement frameworks - Google Patents

Abstract

A bench for tying prefabricated box girder bottom web steel skeleton, which includes several bracket units, two longitudinal beams, at least two mutually parallel first steel support members, two second steel support members and several A third rebar support. Each bracket unit has a right-angle U-shaped structure, several bracket units are arranged side by side and their projections are coincident, and two longitudinal beams connect the tops of several bracket units to form an elongated right-angle U-shaped structure. The bottoms of several bracket units are connected by the first steel support member and the second steel support member to form the base plate steel support portion, and each first steel support member is provided with a plurality of steel reinforcement positioning grooves spaced from each other, and all the steel reinforcement positioning grooves are located in the bottom plate. Align horizontally and vertically. The third steel reinforcement supports have a comb-like structure, and each third steel reinforcement support is detachably disposed on one side of the corresponding bracket unit, and the sides of the several bracket units and the third reinforcement support members together form the abdomen Plate steel support.

Description

A bench used for binding the steel skeleton of the bottom plate of the prefabricated box girder

technical field

The present application belongs to the technical field of bottom plate web reinforcement binding, and in particular relates to a bench used for binding a prefabricated box girder bottom plate web reinforcement frame.

Background technique

In the construction process of infrastructure facilities such as highway bridges, cement reinforcement is a commonly used and extremely important method to ensure the strength of concrete structures. A large number of steel bars are arranged to ensure the structural strength of reinforced concrete. These large numbers of steel bars need to be obtained through professional calculation and analysis to obtain reasonable steel bar distribution rules, and form a steel skeleton by binding.

Generally, the reinforcement of the bottom plate web is bound directly on the pier base, and then concrete is poured. However, due to the large span between the piers, it is extremely inconvenient to operate, and during the operation, there are fewer supporting structures below. , and the reasons for high-altitude operation are likely to cause uneven spacing of steel bars, inaccurate positioning, and easier deformation after binding, which greatly slows down the progress of construction.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the prior art, the present application provides a platform for lashing a steel frame of a prefabricated box girder bottom plate web, which includes: several bracket units, two longitudinal beams, at least two mutually parallel first A steel support member, two second steel support members and several third steel support members. Each of the bracket units has a right-angle U-shaped structure, a plurality of the bracket units are arranged side by side and their projections coincide, and the two longitudinal beams connect the tops of the plurality of bracket units to form an elongated right-angle U-shaped structure . The bottoms of a plurality of the bracket units are connected by the first steel support member and the second steel support member to form a bottom plate steel support portion, and each first steel support member is provided with a plurality of steel support members distributed according to a predetermined interval. All rebar locating grooves are aligned horizontally and vertically. The third reinforcing bar supports are in a comb-like structure, and each of the third reinforcing bar supports is detachably disposed on one side of the corresponding bracket unit, and the sides of a plurality of the bracket units and a plurality of The third rebar supports together constitute the web rebar supports.

Preferably, each of the bracket units includes a first upright post, a second upright post, a connecting rod, a first inclined rod and a second inclined rod.

Preferably, the first column and the second column are parallel to each other, and the connecting rod is located at the bottom of the bracket unit and connects the lower ends of the first column and the second column.

Preferably, one end of the first inclined rod is connected to the first upright column, and the other end is connected to the connecting rod, the first inclined rod is inclined relative to the first upright post, and the second inclined rod is One end is connected to the second upright column, the other end is connected to the connecting rod, and the second inclined rod is inclined relative to the second upright post, and the first inclined rod and the second inclined rod are symmetrical with each other.

Preferably, the two longitudinal beams are respectively connected to the upper ends of all the first uprights or the upper ends of all the second uprights.

Preferably, each of the first steel support members is vertically erected on the connecting rod.

Preferably, two of the second reinforcing bar supports are vertically erected on the connecting rods, and one of the second reinforcing bar supports is connected to the lower end of each of the first inclined bars, and the other is the first Two steel support members are connected to the lower ends of the second inclined rods.

Preferably, each of the third steel support members in the comb-like structure comprises a hand-held portion and a plurality of parallel steel support rods respectively, and the hand-held portion is perpendicular to the plurality of steel support rods and connects the plurality of steel bars One end of the support rod.

Preferably, each of the third steel support members further comprises a limit reinforcement rib, the limit reinforcement rib is vertically connected with a plurality of the steel support rods, and the limit reinforcement rib is parallel to the handle portion .

Preferably, a plurality of the steel support rods on each of the third steel support members are distributed at a predetermined distance, and each of the steel support rods is from the limit reinforcement to the end away from the hand-held portion. The length is equal to or greater than the distance between the first upright post and the second upright post on the bracket unit.

Preferably, the same side of the first column, the second column, the first inclined rod and the second inclined rod of each of the bracket units are respectively provided with a plurality of reinforcing rod supporting rod positioning parts, and the number of the reinforcing rod supporting rod positioning parts is and the spacing is the same as the number and spacing of the steel support rods on the third steel support member, and the first column, the second column, the first inclined rod and the steel support rods on the second inclined rod The positioning part is aligned.

Preferably, the reinforcing bar positioning portion is a hollow tubular member welded and fixed to the first column, the second column, the first inclined rod and the second inclined rod, and the hollow The inner diameter of the tubular member is larger than the outer diameter of the reinforcing bar.

Preferably, the platform is further provided with two sets of prestressed bellows positioning members, each set of the prestressed bellows positioning members is respectively connected with a plurality of the first inclined rods or a plurality of the second inclined rods located on the same side In connection, the prestressed bellows positioning member is arranged so that its bottom is flush with the bottom of the prestressed bellows.

Compared with the prior art, the platform of the present invention for binding the steel reinforcement frame of the prefabricated box girder bottom plate web has a simpler structure and lower cost, and because the operation is performed on the ground, the operation of binding steel reinforcement is much easier. Convenience and safety. The spacing of the steel bars is limited by the steel support rods and the comb-shaped members, so that the spacing of the steel bars is more uniform, which is more suitable for the calculated values during design, and can play a better role. At the same time, the work efficiency is also greatly improved, which can effectively speed up the construction progress. .

Description of drawings

Fig. 1 is the main structure schematic diagram of the gantry used for binding prefabricated box girder bottom plate web steel skeleton;

Fig. 2 is the structural schematic diagram of the third reinforcing bar support;

FIG. 3 is a diagram illustrating the installation of a third reinforcing bar support to the bracket unit.

Detailed ways

In order to help better understand the technical solutions of the present application, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of the main structure of a gantry used for binding the steel reinforcement frame of the bottom plate of the prefabricated box girder.

As shown in FIG. 1 , the platform for tying the steel reinforcement frame of the bottom plate of the prefabricated box girder mainly includes: several bracket units, two longitudinal beams 1, at least two mutually parallel first steel reinforcement supports 7, two A second reinforcing bar support 8 and several third reinforcing bar supports 10 .

Each bracket unit has a right-angle U-shaped structure, several bracket units are arranged side by side and their projections in the longitudinal direction of the longitudinal beam 1 overlap, and the tops of the several bracket units are connected by two longitudinal beams 1 to form an elongated right-angle U type structure.

Each bracket unit includes a first column 2, a second column 2', a connecting rod 6, a first inclined rod 4 and a second inclined rod 4'. The first column 2 and the second column 2' are parallel to each other, and the connecting rod 6 is located at the bottom of the bracket unit and connects the lower ends of the first column 2 and the second column 2'. One end of the first inclined rod 4 is connected to the first column 2, the other end is connected to the connecting rod 6, the first inclined rod 4 is inclined relative to the first column 2, and one end of the second inclined rod 4' is connected to the second column 2' , the other end is connected to the connecting rod 6, and the second inclined rod 4' is inclined relative to the second column 2', and the first inclined rod 4 and the second inclined rod 4' are symmetrical to each other. The angle of inclination of the first inclined rod 4 and the second inclined rod 4' depends on the angle between the web reinforcement frame and the bottom reinforcement frame. The first oblique rod 4 and the second oblique rod 4' can not only reinforce each support unit to make it more stable and firm, but also can limit the angle between the steel bar of the web and the steel bar of the bottom plate, so that the steel bar that has been bound is more in line with the design requirements.

The two longitudinal beams 1 are respectively connected to the upper ends of all the first uprights 2 or the upper ends of all the second uprights 2'. In the following description, the longitudinal direction of the longitudinal beam 1 is defined as the longitudinal direction, and the longitudinal direction of the connecting rod 6 is defined as the transverse direction.

The bottoms of several bracket units are connected by the first steel support member 7 and the second steel support member 8 to form a bottom plate steel support portion. Each of the first steel support members 7 is vertically erected on the connecting rod 6 . Two second reinforcing bar supports 8 are respectively erected on the connecting rod 6 vertically, and one of the second reinforcing steel supporting members 8 is fixed to the connecting rod 6 and each first inclined rod 4 at the position of the lower end of each first inclined rod 4 For connection, another second reinforcing bar support 8 is fixedly connected with the connecting rod 6 and each second inclined rod 4' at the position of the lower end of each second inclined rod 4'. Each first reinforcing bar support 7 is provided with a plurality of reinforcing bar positioning grooves distributed at predetermined intervals, and all the reinforcing bar positioning grooves are aligned in the transverse and longitudinal directions. The second steel support member 8 can limit the positions of the steel bars on both sides of the lateral direction, so as to avoid the dislocation of the steel bars on the two sides of the lateral direction. The reinforcing bar positioning grooves on the first reinforcing bar support 7 are used to locate a single steel bar, and the number and interval of the reinforcing bar positioning grooves depend on the construction design requirements of the steel bar frame of the prefabricated box girder bottom plate web.

The third steel bar supports 10 have a comb-like structure, and each third steel bar support 10 is detachably disposed on one side of the corresponding bracket unit, the sides of several bracket units and several third steel bar supports 10 respectively. Together they form the web reinforcement support.

As shown in FIG. 2 , each third steel support member 10 in a comb-like structure includes a hand-held portion 103 and a plurality of parallel steel support rods 101 respectively, and the hand-held portion 103 is perpendicular to the plurality of steel support rods 101 and connects a plurality of all steel support rods 101 . One end of the steel support rod 101. Each third steel support member 10 further includes a limit reinforcement rib 102 , the limit reinforcement rib 102 is vertically connected with the plurality of steel support rods 101 , and the limit reinforcement rib 102 is parallel to the handle portion 103 and located inside the handle portion 103 . .

The plurality of steel support rods 101 on each third steel support member 10 are distributed at predetermined intervals so as to support and define the spacing of the web steel bars. The third reinforcing bar support 10 in this configuration can position the reinforcing bars of the web plate accurately and uniformly, which is more in line with the design requirements of the drawings, and helps to adjust and maintain the straightness of the reinforcing bars.

At least two reinforcing bar positioning portions 3 are respectively provided on the first column 2 , the second column 2 ′, the first inclined bar 4 and the second inclined bar 4 ′ of each bracket unit, and the reinforcing bars on the first column 2 The support rod positioning portion 3 is aligned with the steel support rod positioning portion 3 on the first inclined rod 4 to co-locate and support a third steel support member 10, and the steel support rod positioning portion 3 on the second column 2' is aligned with the second inclined rod. The rebar support bar locators 3 on the bars 4' are aligned to co-locate and support another third rebar support 10.

The reinforcement rod positioning portion 3 is preferably a hollow tube member welded and fixed to the first column 2, the second column 2', the first oblique rod 4 and the second oblique rod 4', and the inner diameter of the hollow tube member is larger than that of the reinforcement support rod. The outer diameter of the rod 101 . Before tying the steel bars, the third steel support member 10 is installed by holding the handle 103 on the third steel support member 10 and applying force to insert at least two steel support rods 101 into and through the corresponding steel support rod positioning parts 3 On the bracket units, a plurality of third steel reinforcement support members 10 are symmetrically installed on both sides of each bracket unit, as shown in FIG. 3 .

When using the platform binding of the present invention to manufacture the steel reinforcement frame of the bottom plate web, considering the convenience of operation, the bottom plate steel reinforcement is usually bound first. other suitable places. After completing the lashing operation of the steel reinforcement on the bottom plate and before starting to tie the steel reinforcement frame of the web, insert the third steel support member 10 into the steel support rod positioning part 3, and use the steel support rod 101 to support the horizontally arranged steel bars to help adjust and maintain the horizontal arrangement The spacing and straightness between the bars. After the web steel reinforcement frame is bound, the third steel support member 10 is removed by holding the hand-held portion 103 to pull and apply force to the outside of the platform to make each steel support rod 101 leave the corresponding steel support rod positioning portion 3, and then remove the third steel support member 10. At this time, the bound steel reinforcement frame of the bottom plate web can be moved away from the bench of the present invention and transferred to a suitable position.

The stand is also provided with two sets of prestressed bellows positioning members 5, each set of prestressed bellows positioning members 5 is respectively connected with several first inclined rods 4 or several second inclined rods 4' on the same side, and the prestressed The bellows positioning member 5 is arranged so that its bottom is flush with the bottom of the prestressed bellows. A positioning coordinate indicator 9 is suspended at an interval of 1 m below the second reinforcing bar support 8. The positioning coordinate indicator 9 is used to indicate the positioning coordinates of the prestressed corrugated pipe, and cooperates with the prestressed corrugated pipe positioning member 5, which can be more accurate. The prestressed bellows can be positioned conveniently and easily, so as to ensure that the prestressed bellows positioning member 5 has a smooth line shape and an accurate position, which is convenient for review and improves work efficiency.

The reinforced skeleton of the bottom plate web completed by using the bench binding of the present application is more in line with the design requirements of the drawings, and also reduces the safety hazard of the staff during the construction process, and also improves the work efficiency and reduces various production costs.

The applicant of the present invention has described and described the embodiments of the present invention in detail with reference to the accompanying drawings, but those skilled in the art should understand that the above embodiments are only preferred embodiments of the present invention, and the detailed description is only to help readers better It should be understood that the spirit of the present invention is not intended to limit the protection scope of the present invention. On the contrary, any improvement or modification made based on the spirit of the present invention should fall within the protection scope of the present invention.

Claims (8)

1. A bench for binding prefabricated box girder bottom web steel skeleton, comprising: several support units, two longitudinal beams (1), at least two mutually parallel first steel support members (7), two second reinforcing bar supports (8) and several third reinforcing bar supports (10), Each of the bracket units has a right-angle U-shaped structure, a plurality of the bracket units are arranged side by side and their projections are coincident, and the two longitudinal beams (1) connect the tops of the plurality of bracket units to form an elongated right angle U-shaped structure, The bottoms of a plurality of the bracket units are connected by the first steel support member (7) and the second steel support member (8) to form a bottom plate steel support portion, each of the first steel support member (7) There are a plurality of reinforcing bar positioning grooves distributed according to a predetermined interval, and all the reinforcing bar positioning grooves are aligned horizontally and vertically. The third reinforcing bar support (10) is in a comb-like structure, and the symmetrical third reinforcing bar support (10) is mounted on each of the bracket units in a detachable manner. The part and a plurality of said third steel support members (10) together constitute the web steel support part. 2. The platform for binding the steel skeleton of the prefabricated box girder bottom plate web according to claim 1, wherein each said support unit comprises a first column (2), a second column (2'), the connecting rod (6), the first inclined rod (4) and the second inclined rod (4'), The first column (2) and the second column (2') are parallel to each other, and the connecting rod (6) is located at the bottom of the bracket unit and connects the first column (2) and the second column the lower end of the column (2'), One end of the first inclined rod (4) is connected to the first column (2), and the other end is connected to the connecting rod (6), and the first inclined rod (4) is opposite to the first The column (2) is inclined, one end of the second inclined rod (4') is connected to the second column (2'), the other end is connected to the connecting rod (6), and the second inclined rod ( 4') is inclined relative to the second column (2'), the first inclined rod (4) and the second inclined rod (4') are symmetrical with each other, The two longitudinal beams (1) are respectively connected to the upper ends of all the first uprights (2) or the upper ends of all the second uprights (2'), Each of the first reinforcing bar supports (7) is vertically erected on the connecting rod (6), respectively, The two second reinforcing bar supports (8) are respectively vertically erected on the connecting rods (6), and one of the second reinforcing bar supports (8) is connected to each of the first inclined bars (4) The lower end of each of the second reinforced bars (8) is connected to the lower end of each of the second inclined rods (4'). 3. The platform for tying prefabricated box girder bottom web steel skeletons according to claim 1 or 2, characterized in that: each of the third steel support members (10) in the comb-like structure comprises a hand-held a part (103) and a plurality of parallel steel support rods (101), the hand-held part (103) is perpendicular to the plurality of steel support rods (101) and is connected to one end of the plurality of steel support rods (101) Department connection. 4. The platform for tying prefabricated box girder bottom web steel skeletons according to claim 3, characterized in that: each of the third steel support members (10) further comprises a limit reinforcing rib (102) respectively , the limit reinforcement rib (102) is vertically connected with a plurality of the steel support rods (101), and the limit reinforcement rib (102) is parallel to the handle portion (103). 5. The platform for tying prefabricated box girder bottom web steel skeletons according to claim 3, characterized in that: a plurality of said steel support rods (10) on each of said third steel support members (10) 101) Distribute according to a predetermined interval. 6. The bench for tying prefabricated box girder bottom web steel skeletons according to claim 2, characterized in that: the first column (2), the second column (2'), the first column (2), the second column (2'), the The first oblique rod (4) and the second oblique rod (4') are respectively provided with a plurality of reinforcing rod supporting rod positioning parts (3), and the reinforcing rod supporting rod positioning parts (3) on the first column (2) Aligned with the reinforcement rod positioning portion (3) on the first inclined rod (4) to co-locate and support one of the third reinforcement rod supports (10), the reinforcement rods on the second column (2') The support rod positioning portion (3) is aligned with the reinforcing rod positioning portion (3) on the second inclined rod (4') so as to co-locate and support the other third steel support member (10). 7. The platform for lashing prefabricated box girder bottom web steel skeletons according to claim 6, characterized in that: the steel support rod positioning portion (3) is welded and fixed to the first upright column (2) , the second column (2'), the first oblique rod (4) and the hollow tubular member on the second oblique rod (4'), the inner diameter of the hollow tubular member is larger than the steel bar The outer diameter of the support rod (101). 8. The bench for binding prefabricated box girder bottom plate web steel skeleton according to claim 2, characterized in that: the bench is also provided with two groups of prestressed bellows positioning members (5), each set of The prestressed bellows positioning member (5) is respectively connected with a plurality of the first inclined rods (4) or a plurality of the second inclined rods (4') located on the same side, and the prestressed bellows positioning member ( 5) Set so that its bottom is flush with the bottom of the prestressed bellows.

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