CN201261866Y - Downward mobile formwork - Google Patents

Abstract

The utility model discloses a downstroke moving framework, which comprises a main girder, guiding beams on both ends of the main girder, and a framework system arranged on the main girder, wherein three leg groups are arranged below the main girder and include an intermediate leg and a rear leg arranged on the front end and the rear end of the main girder, and a front leg arranged below the front guiding beam close to the main girder; and a leg, main girder and guiding beam longitudinal-transverse moving system and a main girder and guiding beam lifting device are arranged among the legs, the main girder and the guiding beams. The downstroke moving framework can achieve automatic movement without the need of extra cranes, thereby improving the adaptability and enhancing the economic competitiveness. The main girder can move transversely together with the outer framework system, so as to obviate the need of the framework transverse moving equipment and reduce the number of transverse moving cylinders by more than 60%; and integral demolding and molding can be achieved without adjusting the templates one by one and span by span, thereby reducing the work load, simplifying the process and greatly improving the level of mechanization.

Description

Downward mobile formwork

technical field

The utility model belongs to bridge construction technology, in particular to a mobile box girder construction formwork and a walking method for the mobile box girder construction formwork during the construction of a bridge engineering superstructure box girder.

Background technique

The mobile formwork can be divided into two types according to the location of its running mechanism. The traveling mechanism is located above the concrete box girder, which is called the upward moving formwork, and the running mechanism is located below the concrete box girder, which is called the downward moving formwork. Mobile formwork is a kind of box girder cast-in-place equipment that can be self-propelled, and its self-propelled method and efficiency have always attracted people's attention. The walking of the mobile formwork includes the vertical movement, lateral movement and lifting of the formwork. The longitudinal movement is to move the mobile formwork from one hole to the construction position of the next hole. The distance of the longitudinal movement is equal to the span of the bridge, which is tens of meters long; the transverse movement is to make the mobile formwork reach the designed horizontal position, sometimes In order to avoid the obstacles in front of the pier body and ensure the smooth progress of the vertical movement, the amount of lateral movement varies from a few centimeters to several meters; the elevation of the formwork can be adjusted for demoulding or to cooperate with the vertical and horizontal movement, and the lifting amount of the formwork is general. From a few centimeters to a dozen centimeters. The conventional self-propelled method of moving the formwork is that the main girder only moves vertically and does not move laterally. The bottom formwork system of the formwork is divided into two in the horizontal direction and moves laterally to both sides respectively; the legs of the mobile formwork use other lifting equipment Transfer to the next hole for reinstallation; after the main beam of the formwork reaches the design position, adjust the formwork to the design position one by one. The shortcomings of the conventional self-propelled method of the mobile formwork are: the lateral movement of the bottom formwork system requires more lateral movement equipment, high cost, and many processes; the legs of the mobile formwork cannot be self-propelled, and other lifting equipment must be cooperated Increased costs, when the site terrain conditions are poor and the lifting equipment is difficult to use, the transfer of the outriggers becomes the bottleneck of the construction of the mobile formwork; the formwork of the mobile formwork needs to be adjusted piece by piece in each construction cycle, and the workload is heavy , the quality of finished beams is highly discrete.

Contents of the invention

The purpose of this utility model is to provide a downward mobile formwork that can realize the overall movement of the main beam and the formwork system, and propose its running method to overcome the above-mentioned problems.

The technical scheme of the utility model is: a downward mobile formwork, which includes a main beam, a guide beam connected at both ends of the main beam, and a formwork system arranged on the main beam, which is characterized in that there are three sets of legs under the main beam, and the The above outriggers include middle outriggers and rear outriggers arranged under the front end and rear end of the main girder, and the front outriggers arranged under the front leading beam close to the main girder; The longitudinal and lateral movement system of the outrigger, the main beam and the guide beam and the lifting device of the main beam and the guide beam are arranged between them.

Each set of outriggers includes two symmetrically arranged outriggers with the same structure; the outriggers include a basic section of outriggers on the top, and a height adjustment section of outriggers connected to the lower part of the basic section of outriggers; the basic section of outriggers The upper part is provided with outriggers and top beams.

The lifting device of the main beam and the guide beam includes a lifting cylinder arranged between the traversing slide seat and the bottom surface of the main beam.

The vertical and horizontal movement system includes a transverse movement device and a vertical movement device with the transverse movement slide seat as the core: the transverse movement device includes a transverse movement slide seat connected with the top beam of the outrigger, and a transverse movement counter connected with the top beam of the outrigger force base, and the traversing oil cylinder connected between the traversing reaction force seat and the traversing sliding seat; the longitudinal moving device includes a traversing sliding seat fixedly connected on the top beam of the outrigger by a fixed rod, a main beam and a guide beam The longitudinal sliding beam installed at the bottom, the movable longitudinal reaction force seat connected to the longitudinal movement sliding beam, the longitudinal movement oil cylinder connected between the longitudinal movement reaction force seat and the transverse movement sliding seat, and the two sides of the bottom of the main beam and the guide beam are arranged The longitudinal movement track of the main beam, the longitudinal movement idler set on the sway slide seat corresponding to the longitudinal movement track of the main beam, and the longitudinal movement device of the outriggers.

A traversing guide rail is arranged on the top surface of the cross beam on the top of the supporting leg, and a limiting guide rail groove is arranged under the traversing sliding seat, and the limiting guide rail groove and the traversing guide rail can slide relative to each other, but cannot be separated.

The outrigger longitudinal movement device includes outrigger longitudinal movement tracks arranged on both sides of the main girder and the lower edge of the guide beam, and hanging wheels are arranged on the outrigger longitudinal movement tracks, and the hanging wheels are connected to the suspension arm, and the suspension arm An easy-to-detachable fixed connection is provided between the traversing sliding seat, and the drive motor is connected to the shaft of at least one hanging wheel on each side of the main beam and the guide beam.

The upper part of the basic section of the outrigger is provided with a wing beam, and the wing beams of the two outriggers in each group are fixedly connected to the pier through the thick steel bars of fine-rolled threads; the height adjustment section of the bottom section outrigger is fixedly connected to the bearing platform On the embedded parts fixed on the top.

The front outrigger, the middle outrigger and the rear outrigger must move laterally before the longitudinal movement, and stop when the distance between the center of gravity and the center of gravity of the girder is the minimum.

The main beam of the mobile formwork carries the outer formwork system and moves laterally on the top beam of the legs, and the relative position of the outer formwork and the main beam on the same side remains unchanged.

The mobile formwork involved in the utility model has the following technical characteristics:

1. The vertical and horizontal moving system is ingenious in conception and reasonable in design. It integrates multiple functions such as main girder lifting, vertical moving, lateral moving, and outrigger vertical and horizontal moving. It is the core of the mobile formwork running mechanism of the utility model;

2. Through the mutual cooperation and automatic conversion of the front outriggers, middle outriggers and rear outriggers, the walking automation of the mobile formwork is realized, and no additional lifting machinery is needed to cooperate with the reverse operation, so that the adaptability of the mobile formwork is strengthened and economical. Increased competitiveness;

3. The main girder moves laterally with the outer formwork system, which reduces the lateral movement equipment of the formwork, and the number of lateral movement cylinders for a complete set of mobile formwork is reduced by more than 60%;

4. Overall demoulding, overall mold closing, no need to adjust the formwork step by step, the labor load is reduced, the process is simplified, and the degree of mechanization is greatly improved;

5. The structure is symmetrical, which can be used for both forward construction and backward construction. It is only necessary to change the longitudinal movement oil cylinder to the other side of the transverse movement slide seat for installation, which can avoid the U-turn of the mobile formwork at the construction site;

6. The outrigger structure is attached to the pier body by pulling the fine-rolled thick steel bars to form a hoop, which is stable and reliable, with light weight and strong bearing capacity.

Description of drawings

Figure 1 Elevation view of mobile formwork.

Fig. 2 The cross-sectional view of the mobile formwork structure in the pouring state.

Fig. 3 is a cross-sectional view of the mobile formwork structure in the state of passing through holes after the main beam has moved laterally.

Figure 4 is a cross-sectional view of the structure of the mobile formwork in the state of vertical movement after the outriggers have moved laterally.

Figure 5 is the longitudinal elevation view of the vertical and horizontal movement system of the mobile formwork.

Fig. 6 Transverse sectional view of the vertical and horizontal movement system of the mobile formwork.

Fig. 6a is an enlarged schematic diagram of the vertical movement guide rail in the vertical and horizontal movement system of the mobile formwork.

In the figure: 1 is the main beam, 2 is the guide beam, 3 is the inner formwork system, 4 is the wing plate formwork system, 5 is the side formwork system, 6 is the bottom formwork system, 7 is the front outrigger, 8 is the middle outrigger, 9 is the rear leg, 10 is the vertical and horizontal moving system, 11 is the vertical moving idler, 12 is the vertical moving oil cylinder, 13 is the vertical moving sliding beam, 13-1 is the connection hole, 14 is the vertical moving reaction seat, and 15 is the horizontal Sliding seat, 16 is a horizontal movement oil cylinder, 17 is a horizontal movement reaction force seat, 18 is a suspension wheel, 19 is a suspension arm, 20 is a fixed rod, 21 is a vertical oil cylinder, 22 is a supporting leg top beam, 22- 1 is the traverse guide rail, 23 is the limit guide rail groove, 24 is the driving motor, 25 is the vertical movement track of the main beam, 26 is the vertical movement track of the outrigger, 27 is the basic section of the outrigger, and 28 is the adjustment section of the outrigger. 29 is the pre-embedded part of the cap, 30 is the wing beam, 31 is the fine-rolled thick steel bar, 32 is the concrete box girder, 34 is the middle pier body, 35 is the rear pier body, and 36 is the cap

Detailed ways

As shown in Figure 1, the concrete box girder 32 that has been poured between the rear pier body 35 and the middle pier body 34, the two main beams 1 below the concrete box girder and on both sides of the pier body, and the guide rails installed at both ends of the main girder 1 Beam 2 (front guide beam and rear guide beam), internal formwork system 3 (in Figure 2), wing plate formwork system 4, side formwork system 5, and bottom formwork system 6 installed on the main beam 1 are arranged on the guide beam 2 The two front outriggers 7 below, the two middle outriggers 8 arranged under the front end of the main beam 1, the two rear outriggers 9 arranged under the rear end of the main beam 1, and the main beam 1 and each outrigger Between vertical and horizontal shift system 10.

As shown in FIG. 2 , the structure on the middle leg is used for illustration, and the structures of the front leg and the rear leg are the same as those on the middle leg. A middle leg is respectively arranged on both sides of the middle pier body 34. The middle leg includes the top leg basic segment 27, and the leg height adjustment segment 28 (leg height adjustment segment) connected to the bottom of the leg basic segment 27. The number of sections depends on the construction requirements); the upper part of the basic section 27 of the outrigger is provided with a top beam 22; Among Fig. 5), the wing spar 30 of two outrigger tops is fixed on the body of pier by pull-up thread thick steel bar 31 (in Fig. 6).

The vertical and horizontal movement system and the main beam and guide beam lifting device are arranged in the middle leg, and the vertical and horizontal movement system includes a transverse movement device and a longitudinal movement device.

As shown in Figure 6, the traversing device includes a traversing slide 15 connected to the top beam 22 of the outrigger, and a traversing power device is connected between the traversing slide 15 and the top beam 22 of the outrigger, and the upper part of the traversing slide 15 The vertical moving idler roller 11 and the hanging wheel 18 are installed, and are connected with the main beam longitudinal moving track 25 and the supporting leg longitudinal moving track 26 respectively. The traversing power device includes a traversing reaction force seat 17 connected to the top beam 22 of the outrigger, and a traversing oil cylinder 16 is connected between the traversing reaction force seat 17 and the traversing sliding seat 15 .

As shown in Figure 5, the top surface of the top crossbeam 22 of the supporting leg is provided with a traverse guide rail 22-1, and the traverse slide seat 15 is provided with a limit guide rail groove 23, and a number is reserved between the limit guide rail groove 23 and the traverse guide rail 22-1. Millimeter gap, the limit guide rail groove 23 hooks the traversing guide rail 22-1 of the top beam 22 of the outrigger, so that the traversing slide seat 15 and the top beam 22 of the outrigger can only slide mutually, and cannot be disengaged from each other; The seat 15 is fixed on the legs through the fixed rod 20, and the function of the fixed rod 20 is to ensure the stability of the traversing slide seat 15 when the main beam 1 moves vertically; , the fixed rod 20 should be removed in advance.

As shown in Figure 6a, the upper part of the traversing slide 15 is equipped with a longitudinal idler 11 and a suspension wheel 18, which are respectively connected to the main beam longitudinal movement track 25 and the leg longitudinal movement track 26;

The vertical moving device is as shown in Figure 5, and it comprises the vertical sliding beam 13 (the vertical sliding beam 13 is arranged on the middle part of the main beam and the lower bottom surface of the guiding beam, as shown in Figure 6) under the main beam and the guide beam, The longitudinal sliding beam 13 is connected with a movable vertical moving reaction seat 14, and the longitudinal moving oil cylinder 12 is connected between the longitudinal moving reaction seat 14 and the lateral sliding seat 15; a row of connection holes 13 are arranged on the longitudinal sliding beam 13 -1, the longitudinal movement reaction force seat 14 is connected with the connection hole 13-1 through bolts, and the longitudinal movement reaction force seat 14 realizes the spaced longitudinal movement of the main beam and the guide beam by connecting with different connection holes. The main beam longitudinal moving track 25 is arranged on both sides of the main beam and the bottom of the guide beam (Fig. 6a).

As shown in Figure 5 and Figure 6a, at least 4 detachable suspension arms 19 are arranged on the traversing slide 15, and suspension wheels 18 are installed on the upper ends of the suspension arms 19, which are suspended on both sides of the lower edge of the main beam 1. The legs move vertically on the track 26; at least one suspension wheel 18 is equipped with a drive motor 24 on each side of the main girder 1.

As shown in Figure 3, the mobile formwork is removed from the mold, moved laterally to the position, and vertically moved through the hole. The vertical oil cylinder 21 retracts, the main girder descends, and the outer mold is demoulded; the main girder descends until the main girder longitudinal movement track 25 at the bottom contacts the longitudinal movement idler 11, starts the transverse movement oil cylinder 16, pulls the transverse movement slide 15, and drives The main beam and the outer formwork move laterally to one side; during this process, the relative positions of the wing plate formwork system 4, side formwork system 5, bottom formwork system 6 and the main beam 1 on the same side remain unchanged. After the lateral movement is in place, the bottom mold has completely moved out of the range of the pier body, and now the main girder 1 can be moved longitudinally.

As shown in Figure 4, the middle outrigger is in the state of moving laterally and moving vertically. At this time, the supporting leg to be moved is separated from the bearing platform, and is hung on the vertical moving track 26 of the supporting leg on both sides of the lower edge of the main beam of the mobile formwork through the hanging arm 19 and the hanging wheel 18 on the traversing slide 15. The main beam longitudinal moving track 25 and the longitudinal moving idler 11 are in a disengaged state. Turn on the traversing oil cylinder 16 to push the outriggers to move laterally until the center of gravity of the outriggers is close to the center of gravity of the main girder, so as to avoid the hanging on both sides of the main girder caused by eccentric lifting. The hanging wheel 18 is unevenly stressed, and now the driving motor 24 ( FIG. 6 a ) installed on the hanging wheel 18 is opened, and the supporting leg can move longitudinally on the supporting leg longitudinal moving track 26 .

The main girder lifting method is: synchronously jack up the 8 vertical oil cylinders 21 on the top traversing slides 15 of the three groups of front legs 7, middle legs 8, and rear legs 9. , then the main girder rises, and these 8 vertical oil cylinders 21 retract synchronously, then the main girder descends until it falls on the longitudinal moving idlers 11.

The method of longitudinal movement of the main girder is: first lower the main girder, supported by the longitudinal moving idlers 11 on the front outrigger 7 and the middle outrigger 8 or the front outrigger 7 and the rear outrigger 9, and then extend the middle outrigger 8 The vertical movement oil cylinder 12 on the top moves the main girder longitudinally; after the longitudinal movement oil cylinder 12 is extended to the maximum stroke, the temporary connection between the longitudinal movement reaction force seat 14 and the longitudinal movement sliding beam 13 is released, and the piston rod of the longitudinal movement oil cylinder 12 carries The vertical movement reaction force seat 14 is retracted, and the longitudinal movement reaction force seat 14 is temporarily fixed on the longitudinal movement sliding beam 13 again, and the top extension longitudinal movement oil cylinder 12 is continued, and so on, until the main beam longitudinally moves in place.

The main girder traverse method is as follows: first lower the main girder, supported by the vertical moving rollers 11 on the middle outrigger 8 and the rear outrigger 9, and then release the connection between the bottom formwork on the left and right sides, and extend the lateral movement cylinder 16 to the maximum stroke, temporarily fix the lateral movement reaction seat 17 and the top beam 22 of the outrigger, retract the piston rod of the lateral movement cylinder 16, pull the lateral movement slide seat 15, and drive the main beam to laterally move outward together, and the middle leg 8 and the traversing cylinder 16 on the rear outrigger 9 should be operated synchronously; after the piston rod is fully retracted, the temporary connection between the traversing reaction force seat 17 and the top beam 22 of the outrigger is released, and the traversing cylinder 16 is lifted to the maximum After the stroke, the traversing reaction force seat 17 and the top beam 22 of the supporting legs are fixed again, and the traversing oil cylinder 16 retracts, and so on, until the main beam is traversing in place. The method of girder traversing inboard is opposite to this, and traversing oil cylinder 16 changes and pulls and pushes.

The method of raising and lowering the outriggers is as follows: taking the lifting of the middle outrigger 8 as an example, first remove the connection between the middle outrigger 8 and the embedded part 29 on the top of the platform, and install the hanging arm on the top of the middle outrigger 8 on the sliding seat 15 19 and the hanging wheel 18, after confirming that the hanging arm 19 and the hanging wheel 18 on the top traversing slide 15 of the front outrigger 7 and the rear outrigger 9 are in the dismantled state, synchronously lift the front outrigger 7 and the rear outrigger The vertical oil cylinder 21 on the 9 makes the main girder rise, and the middle leg 8 is driven up by the hanging wheel 18 and the traversing slide 15, and is separated from the embedded part 29 of the bearing platform top; the front leg 7 and the rear leg 9 The upper vertical oil cylinder 21 retracts synchronously, and then the middle leg 8 descends.

The method for the lateral movement of the outriggers is: taking the longitudinal movement of the middle outrigger 8 as an example, first raise the middle outrigger 8 according to the aforementioned method, and separate it from the embedded part 29 at the top of the platform, and then push the traversing oil cylinder 16 to make the support The leg moves laterally until the center of gravity of the supporting leg is close to the center of gravity of the main beam; when the supporting leg is laterally moving inwardly, the laterally moving oil cylinder 16 changes from pushing to pulling.

The method for the longitudinal movement of the legs is as follows: taking the longitudinal movement of the middle leg 8 as an example, firstly lift the middle leg 8 according to the aforementioned method, move it laterally until the center of gravity is close to the center of gravity of the main girder 1, and turn on the driving motor 24 on the hanging wheel 18 , so that the legs move longitudinally along the vertical leg track 26 .

Claims (7)

1. A descending mobile formwork, which includes a main beam, a guide beam connected at both ends of the main beam, and a formwork system arranged on the main beam, which is characterized in that three groups of legs are set under the main beam, and the legs include The middle outriggers and rear outriggers set under the front and rear ends of the main girder, and the front outriggers set under the main girder close to the front guide beam; Legs, girders and guide girders for longitudinal and lateral movement, and girder and guide girder lifting devices. 2. The downward mobile formwork according to claim 1, characterized in that each group of legs includes two symmetrically arranged legs with the same structure; The outrigger height adjustment segment connected to the lower part of the segment; the upper part of the basic segment of the outrigger is provided with a top cross beam of the outrigger. 3. The downward mobile formwork according to claim 1 or 2, characterized in that the vertical and horizontal movement system includes a transverse movement device and a longitudinal movement device with the transverse movement slide seat as the core: the transverse movement device comprises The connected traversing sliding seat, the traversing reaction force seat connected with the top beam of the outrigger, and the traversing oil cylinder connected between the traversing reaction force seat and the traversing sliding seat; The traversing sliding seat on the beam on the top of the outrigger, the longitudinal sliding beam installed on the bottom of the main beam and the guide beam, the movable longitudinal moving reaction seat connected to the longitudinal moving sliding beam, the longitudinal moving reaction seat and the transverse sliding slide The vertical movement oil cylinder connected between the seats, the main beam longitudinal movement track arranged on both sides of the main beam and the bottom of the guide beam, the longitudinal movement idler set on the traverse slide seat corresponding to the main beam longitudinal movement track, and the outrigger longitudinal movement device. 4. The downward moving formwork according to claim 3, characterized in that the top surface of the top beam of the leg is provided with a traversing guide rail, and the traversing slide seat is provided with a limit guide rail groove, and the distance between the limit guide rail groove and the traversing guide rail can be Relatively sliding, but not detachable. 5. The downward mobile formwork according to claim 3, characterized in that the outrigger longitudinal movement device includes outrigger longitudinal movement tracks arranged on both sides of the main beam and the lower edge of the guide beam, and the outrigger longitudinal movement track is provided with Suspension wheels, the suspension wheels are connected to the suspension arm, and an easily detachable fixed connection is arranged between the suspension arm and the traversing sliding seat, and the shaft of at least one suspension wheel on each side of the main beam and the guide beam is connected with a driving motor. 6. The descending mobile formwork according to claim 1 or 2, characterized in that a wing beam is arranged on the upper part of the basic section of the legs, and the wing beams of the two legs in each group are pulled and fixed by thick steel bars with fine-rolled threads. It is connected to the pier body; the height adjustment section of the outrigger of the bottom section is fixedly connected to the embedded part fixedly arranged on the top of the cap. 7. The downward movable formwork according to claim 3, characterized in that the elevating device of the main beam and the guide beam includes a lifting oil cylinder arranged between the traversing sliding seat and the bottom surface of the main beam.

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