CN206971086U - Cast-in-situ box girder side web and wing plate are integrally supported frame - Google Patents

Abstract

The utility model relates to a cast-in-place box girder side web and wing plate integral support frame, the bottom frame is arranged horizontally, one end of the web support bar is movably connected with one end of the bottom frame, the other end of the web support bar is connected with the wing plate support bar One end is flexibly connected, one end of the flap adjusting rod is flexibly connected to the other end of the chassis, the other end of the flap adjusting rod is flexibly connected to the other end of the flap supporting rod; one end of the web adjusting rod is connected to the waist of the web supporting rod The other end of the web adjusting rod is flexibly connected with the chassis; the length of the web supporting rod, the wing adjusting rod and the web adjusting rod can be adjusted. The utility model separates the side web and wing plate support of the cast-in-place box girder separately and designs it as a tool-type support, which is simpler, quicker and easier to control than the traditional support, and overcomes the overlap between the side web of the box girder and the wing plate support in the construction process. Dismantling tedious technical problems and saving materials.

Description

Cast-in-place box girder side web and wing integrated support frame

technical field

The utility model belongs to the technical field of bridge construction, and relates to a supporting structure of a side web and a wing plate in a cast-in-place box girder bridge construction.

Background technique

With the rapid development of my country's transportation industry and urban construction, especially in the context of the continuous development of the transportation industry and the continuous growth of traffic flow, a large number of overpasses and level crossing bridges have been built. For viaducts and overpasses, it is usually necessary to set up branch links with variable slope, variable curvature, and variable width at the connection between the main bridge and the ramp, and between the main line and the branch line, resulting in many bridges with irregular geometric shapes.

At present, the construction of the special-shaped section is mainly realized through the adjustment of the support of the lower web and wing plate of the bridge. The side web of the cast-in-place box girder and the support of the wing plate are not distinguished, and are the same as the lower support of the cast-in-place box girder box chamber. Since the 1960s, my country has started to use fastener-type steel pipe scaffolding. The scaffolding composed of fasteners and steel pipes has won a lot of attention due to its advantages of simple processing, low construction technical requirements, convenient handling, high versatility, and low price. Great development and application, at present, still occupy more than 70% of the domestic market in China. Fastener-type scaffolding has been widely used in the cast-in-place box girder full house support.

There is no difference between the erection method of the conventional cast-in-place box girder side web and flange support frame and the erection method of the bottom bracket of the box girder except for the change in spacing. The main problems are:

1. The erection method is cumbersome, complicated and wastes materials;

2. The cast-in-place box girder bridge has more box girders in the width gradient section (curve section, lane change section, main line to ramp section, etc.), and the line shape of the side web and wing plate is often changed. It is difficult to adjust the side webs and flanges of the conventional support frame, which affects the construction efficiency during construction, and the line shape is difficult to control, which ultimately affects the structural appearance quality of the box girder entity;

3. The erection method of the conventional support frame is more conducive to bearing the load, but the load at the side web and wing plate of the box girder is very small, and the support capacity of the support frame erected in the conventional method is much higher than the load of the working condition, and increasing the distance between the members will not It is beneficial to control structural deformation, that is to say, there is a considerable waste of efficiency when conventional support frames are used at the side webs and flanges of cast-in-place box girders.

At present, the cast-in-place box girder side web and wing plate supports have not been separately designed in China. The conventional cast-in-place box girder supports are erected as shown in Figure 1.

Contents of the invention

The utility model aims at the technical problems of cumbersome, complex, material waste, difficult adjustment and difficult control of the line shape of the conventional support frame at the side web and wing of the cast-in-place box girder. The utility model proposes an adjustable pin Axial cast-in-place box girder side web and wing plate tooled integrated support frame.

The technical solution of the utility model is:

The cast-in-place box girder side web and wing plate integral support frame of the utility model is special in that:

The integrated support frame includes a bottom frame, a wing plate support rod, a web support rod, a wing plate adjustment rod and at least one web adjustment rod, the bottom frame is horizontally arranged, and one end of the web support rod is connected to the bottom frame. One end is movably connected, the other end of the web support rod is movably connected with one end of the flap support rod, one end of the flap adjustment rod is movably connected with the other end of the underframe, and the other end of the flap adjustment rod is connected with the The other end of the wing plate supporting rod is flexibly connected; one end of the web adjusting rod is flexibly connected to the waist of the web supporting rod, and the other end of the web adjusting rod is flexibly connected to the chassis; the web supporting rod, The length of the wing plate adjusting rod and the web adjusting rod can be adjusted.

The above is the basic structure of the utility model, and based on the basic structure the utility model also makes the following optimization restrictions:

For the convenience of adjustment, the above-mentioned underframe, the wing plate support rod, the web support rod, the wing plate adjustment rod and the web adjustment rod are connected by pin shafts. The lower end of the web support rod is provided with a threaded hole, and is connected with a screw rod, and an adjusting nut is also arranged on the screw rod, and the screw rod is connected with the bottom frame through a pin shaft connecting part. Two ends of the wing plate adjusting rod are respectively provided with a thread opening, and the directions of the two thread openings are opposite, and each thread opening is respectively provided with a screw rod, and the screw rod is correspondingly connected with the wing plate support plate and the underframe through the pin shaft connecting parts. Both ends of the web adjusting rod are respectively provided with a thread opening, and the directions of the two thread openings are opposite, and each thread opening is respectively provided with a screw rod, and the screw rod is correspondingly connected with the web support rod and the bottom frame through the pin connecting part.

Furthermore, in order to improve the bending resistance of the integrated support frame, the wing plate support rod and the web support rod of the utility model are square steel pipes, and the cross-section pipe height of the square steel pipes is twice the pipe width. In the case of the same cross-sectional area, the cross-sectional resistance moment of this square pipe is larger than that of the round pipe, which means that the pipe has better bending resistance.

Compared with the prior art, the utility model has the advantages of:

1. Simple and fast: the utility model separates the side web and wing plate bracket of the cast-in-place box girder and designs it as a tool-type bracket, which is simpler, faster and easier to control than the traditional bracket, and overcomes the problem of the side web of the box girder in the construction process. And the technical problem of cumbersome mounting and dismantling of the wing plate bracket.

As shown in Figure 2, the conventional support frame needs to set up 6 vertical rods, 3 oblique rods, and 3 horizontal rods in a single section at the side web and wing plate of the box girder, and finally combine them into a frame body. However, the use of the support frame only needs one frame body, and the frame body is already a whole after the processing is completed.

2. Saving materials: The support frame of this utility model abandons the structural stress form of the conventional bracket jacking bearing, changes the jacking bearing mode to the combined bearing of the jacking bracket and the rod, and connects it with the rod with a pin shaft to strengthen its structure. Stability, greatly reducing the number of jacking, greatly saving materials.

As shown in Figure 2, the single section of the conventional support frame at the side web and wing plate of the box girder consists of 6 vertical bars, 3 oblique bars, and 3 horizontal bars, a total of 12 bars. And use this bracing frame to only be made up of 5 rods, jacking also becomes 3 by 6 of conventional support.

3. Easy to adjust: the connection between the poles of conventional fastener scaffolding is socket type, which has certain stability, but the socket type connection can only be connected coaxially with the upper and lower rods, and the angle between the rods cannot be adjusted. .

The four frames of the integrated support frame of the utility model and at least one web adjusting rod are connected by pin shafts, and the lengths of the web supporting rod, the wing adjusting rod and the web adjusting rod can be adjusted, so that the original socket can be retained The stability of the formula, and the angle between the rods can be adjusted. The height and angle can be adjusted at any time during use without disassembly and assembly, and has the advantage of convenient adjustment.

4. Good structural alignment: The utility model uses pins to connect the inclined bars and cross bars of the bracket, and can freely adjust the angles of the side webs and wing plates of the box girder, which is more conducive to ensuring the structural alignment. Screw rods and adjusting nuts are provided at the bottom of the inclined rods, which can adjust the height of the side web of the box girder, and are more suitable for box girders with varying beam heights.

5. High turnover rate: the support frame of the utility model is easy to assemble and disassemble, so the damage rate is low and the turnover rate is high in the actual construction process.

6. Good applicability: the supporting frame of the utility model can be effectively connected with conventional scaffolding to form a stable whole, and has universal applicability in cast-in-place box girder wing plates and side webs.

7. Labor saving: After the box girder support is erected, its elevation position needs to be adjusted. The adjustment efficiency of the utility model is more than three times that of the conventional bracket. We selected 5 workers to adjust and compare the conventional support and the utility model support at the side web and wing plate of the box girder respectively. The average efficiency of a single worker adjusting the conventional support is 5 linear meters per hour, while adjusting the utility model support is 15.6 linear meters /Hour.

Description of drawings

Figure 1 is the erection method of conventional cast-in-place box girder brackets;

Fig. 2 is a structural schematic diagram of the utility model integrated support frame used for side web and wing plate support;

Fig. 3 is a structural schematic diagram of the integrated support frame of the side web and the wing plate of the utility model;

Fig. 4 is a schematic diagram of the pin connection structure.

Fig. 5 is a schematic diagram of the use of a support frame welded with a rotating steel ring;

Fig. 6 is a schematic diagram of the connection between the web support rod and the underframe;

Figure 7 is a schematic diagram of the connection between the bottom frame and the lower bracket;

Fig. 8 is a structural schematic diagram of fixing the bottom frame and the lower bracket using a U-shaped ring.

The reference signs are: 1-base frame, 2-wing plate support rod, 3-web support rod, 4-wing plate adjustment rod, 5-web plate adjustment rod, 6-pin shaft connecting part, 7-screw, 8-adjusting nut, 9-rotating steel ring, 10-lower bracket, 11-U-shaped ring, 12-side web, 13-wing plate.

Detailed ways

The utility model aims at the defects of the conventional support frame at the side web 12 and the wing plate 13 of the cast-in-place box girder. 12 and the wing plate support frame for R & D and design, and finally a utility model that is simple to build and disassemble, easy to adjust, easy to control and inspect, especially for box girders with gradually changing widths of cast-in-place box girder bridges (curve sections, lane change sections, The main line is connected to the ramp section, etc.), where the side web 12 and the line shape of the wing plate change a lot, which is more conducive to its line shape control, and meets the relevant specifications, standards and design requirements. Support frame to achieve the purpose of guaranteeing construction quality, improving construction efficiency and saving resources. The utility model is described in detail below in conjunction with accompanying drawing.

The cast-in-place box girder side web 12 and wing plate integral support frame of the present utility model includes a base frame 1, a wing plate support rod 2, a web support rod 3, a wing plate adjustment rod 4 and two web adjustment rods 5, Wherein the bottom frame is arranged horizontally, the lower end of the web support rod 3 is provided with a threaded hole, and is connected with a screw rod 7, and an adjusting nut 8 is also arranged on the screw rod 7, and the screw rod 7 is connected with one end of the bottom frame 1 through a pin shaft connecting part 6, The other end of the web support bar 3 is connected with one end of the wing plate support bar 2 through a pin shaft, and a thread opening is respectively arranged at both ends of the wing plate adjusting bar 4, and the directions of the two thread openings are opposite, and each thread opening is provided with a A screw 7 is correspondingly connected with the wing plate support plate and the underframe 1 through the pin shaft connection part 6 . The two ends of the web adjusting rod 5 are respectively provided with a thread opening, and the directions of the two thread openings are opposite, and each thread opening is respectively provided with a screw rod 7, and the screw rod 7 corresponds to the waist of the web support rod 3 through the pin shaft connecting part 6. Connect with chassis 1. The lengths of the web support rod 3, the wing plate adjustment rod 4 and the web adjustment rod 5 are adjusted by the screw rod 7, and the angle and the height of the support frame are adjusted by adjusting the relative length.

The wing plate regulating rod 4 and the web regulating rod 5 are round steel pipes. The wing plate support rod 2 and the web support rod 3 are square steel pipes, and the cross-section pipe height of the square steel pipe is twice the pipe width. In the case of the same cross-sectional area, the cross-sectional resistance moment of this square pipe is larger than that of the round pipe, which means that the pipe has better bending resistance. For example: if the top width of the square pipe is 50mm and the pipe thickness is 3mm, then its section resistance moment is W1=[50*100^3-(50-6)*(100-6)^3]/600=22424mm^3. The outer diameter of the equal-section circular tube is D=(300-4)/π+1.5=96mm, and its section resistance moment W2=0.0982[D^4-(D-3)^4]/D=10362mm^3. So W1>W2.

As shown in Figure 4, the joints of the rods are connected by pin shafts, and the pins are fixed with hard iron wires to prevent slipping, and the angle of the bracket can be adjusted.

As shown in Figure 5, the two ends of the steel pipe are provided with positive and negative thread ports to connect with the screw rod 7, and the middle part of the steel pipe is welded with a φ4cm rotating steel ring, and the steel bar section below φ3cm can be inserted into the rotating steel pipe to adjust the length of the screw rod 7 at both ends of the steel pipe, thereby achieving adjustment. The purpose of the overall shape of the bracket.

The oblique square tube of the side web is connected with the lower channel steel by a pin shaft, and the angle of the side web can be adjusted. The oblique pipe part is provided with a screw rod 7 and an adjusting nut, which can adjust the oblique length of the side web and transmit the load (as shown in Figure 6).

In order to ensure the effective combination of this bracket system with conventional brackets, the lower part of the bracket uses 12# channel steel as the force transmission member for reference to the connection method between the light rail and its track, so that it can just be fixed with the lower square wood buckle (as shown in Figure 7), and the lower part The square wood is drawn out from the keel at the bottom of the box girder, and it is just integrated with the overall support frame to ensure its stability and integrity. In order to further strengthen the integrity of the channel steel and the lower square wood, U-shaped rings 11 are used to fix the two, and conventional steel pipes and fasteners are used to connect each integrated frame to ensure the integrity (as shown in Figure 8).

Through force calculation, finally determine its main stressed member composition, its stressed member can be further strengthened for the larger wing plate and side web of load, table 1 is listed as the material used in a specific embodiment of the present utility model.

Table 1

Compared with conventional scaffolding, cast-in-place box girder side web and wing plate integrated support frame overcomes the cumbersome assembly and disassembly of box girder side web and wing plate support during the construction process, difficulty in adjusting the formwork later, untargeted ordinary scaffolding, and waste of materials and other shortcomings. In addition, because the support frame is easy to assemble and disassemble, the damage rate is low and the turnover rate is high in the actual construction process. In the case of the same spacing along the bridge direction, more than 9 jacking brackets need to be adjusted in the post-adjustment of a single-section conventional support frame, but only 3 jacking brackets need to be adjusted, and the degree of freedom of adjustment is also significantly improved, which greatly reduces its adjustment time and improves It improves the work efficiency of workers and is more conducive to the guarantee of the appearance of the box girder. Effectively control the shape changes of the side webs and flanges of cast-in-place box girders, improve construction quality, reduce labor intensity, and greatly save labor costs. It is a supplement and improvement to existing construction tools and promotes the development of engineering construction tools. .

Claims (10)

1. The integrated supporting frame of the side web and the wing plate of the cast-in-place box girder is characterized in that: The integrated support frame includes a bottom frame, a wing plate support rod, a web support rod, a wing plate adjustment rod and at least one web adjustment rod, the bottom frame is horizontally arranged, and one end of the web support rod is connected to the bottom frame. One end is movably connected, the other end of the web support rod is movably connected with one end of the flap support rod, one end of the flap adjustment rod is movably connected with the other end of the underframe, and the other end of the flap adjustment rod is connected with the The other end of the wing plate supporting rod is flexibly connected; one end of the web adjusting rod is flexibly connected to the waist of the web supporting rod, and the other end of the web adjusting rod is flexibly connected to the chassis; the web supporting rod, The length of the wing plate adjusting rod and the web adjusting rod can be adjusted. 2. The cast-in-place box girder side web and flange integral support frame according to claim 1, characterized in that: The underframe, the wing plate support rod, the web support rod, the wing plate adjustment rod and the web adjustment rod are connected by pin shafts. 3. The cast-in-place box girder side web and flange integrated support frame according to claim 2, characterized in that: iron wire clips are arranged at the joints of the pin shafts. 4. The cast-in-place box girder side web and wing plate integrated support frame according to claim 2, characterized in that: the lower end of the web support rod is provided with a threaded hole, and is connected with a screw, and the screw is also provided with The adjusting nut and the screw rod are connected with the bottom frame through the pin shaft connection part. 5. The cast-in-place box girder side web and flange integral support frame according to claim 2, characterized in that: The two ends of the flap adjusting rod are respectively provided with a thread opening, the directions of the two thread openings are opposite, and each thread opening is respectively provided with a screw rod, and the screw rod is correspondingly connected with the wing plate support plate and the chassis through the pin shaft connecting parts. 6. The cast-in-place box girder side web and flange integral support frame according to claim 2, characterized in that: Both ends of the web adjusting rod are respectively provided with a thread opening, and the directions of the two thread openings are opposite, and each thread opening is respectively provided with a screw rod, and the screw rod is correspondingly connected with the web support rod and the bottom frame through the pin connecting part. 7. According to claim 1 or 2 or 3 or 4 or 5, the cast-in-place box girder side web and flange integrated support frame is characterized in that: The bottom frame is a channel steel, and the opening of the channel steel can be interlocked with the square wood of the lower support. 8. According to claim 1 or 2 or 3 or 4 or 5, the cast-in-place box girder side web and flange integrated support frame is characterized in that: The wing plate adjusting rod and the web adjusting rod are round steel pipes. 9. According to claim 1 or 2 or 3 or 4 or 5, the cast-in-place box girder side web and flange integrated support frame is characterized in that: The wing plate support rods and the web support rods are square steel pipes, and the cross-section height of the square steel pipes is twice the pipe width. 10. The cast-in-place box girder side web and wing integrated support frame according to claim 3, 4 or 5, characterized in that: the middle part of the web support rod, the flange adjustment rod and the web adjustment rod is welded With swivel steel ring.