CN104695335B - Construction method and construction device of integral binding and hoisting of steel bars in upward mobile formwork - Google Patents

Abstract

The present invention relates to upstroke movable framework steel bar overall binding lifting construction engineering method and constructing device, casting concrete at the framework of steel reinforcement in exterior sheathing is formed box beam；Strong health preserving, stretch-draw, mud jacking and the sealing off and covering anchorage working procedure such as the box beam pouring molding is carried out；Meanwhile, previous hole is poured on the concrete box girder of molding and mold has been set, assembling reinforcement skeleton along the longitudinal direction on mold.Afterwards upstroke movable framework via advance to next across, after being adjusted in place, being delivered in upstroke movable framework by mold by framework of steel reinforcement, and be hoisted in exterior sheathing achieve synchronization job by boom hoisting by framework of steel reinforcement, the construction period in each hole can shorten about sky.Relative to traditional construction technique, meet large span, large-tonnage and the requirement of high headroom.It is equally applicable simultaneously for the situation that cannot arrange straddle truck walking track under the bridge floors such as offshore construction.

Description

Construction method and construction device of integral binding and hoisting of steel bars in upward mobile formwork

technical field

The invention relates to the technical field of bridge construction, in particular to a construction method and a construction device for integrally binding and hoisting steel bars of an upward mobile formwork frame.

Background technique

The mobile formwork bridge building machine is a construction machine with its own formwork, which uses the cap or pier column as a support to pour the bridge on site. The construction process of the mobile formwork is a flow operation, and the steps are as follows: 1. Move the formwork through the hole and adjust it in place; 2. Bind the bottom, web steel bars, and arrange prestressed steel beams; 3. Assemble the inner mold; 4. Bind the top plate 5. Pouring box girder concrete; 6. Equal strength maintenance; 7. Tensioning, grouting, and anchor sealing. The construction period of each beam is about 18 days. The mobile formwork construction process must be completed before the next process can be carried out. At present, the existing overall hoisting scheme of the steel frame is as follows: the steel frame is bound and formed in the steel bar binding mold, the hoisting truss is installed on the steel frame to increase the rigidity of the steel frame, and the entire steel frame is hoisted into the mold by two gantry cranes. This scheme is mostly used in the construction of precast concrete beams in beam yards. If such a scheme is adopted for mobile formwork construction, the gantry crane needs to span the construction bridge and meet the requirements of large span and high clearance. At the same time, it is necessary to set the gantry crane walking track under the bridge deck. This kind of scheme is difficult to implement in most cases, the main reasons are as follows: 1. The gantry crane has high requirements and must meet the requirements of large span, large tonnage, and high clearance; 2. When the height of the pier column is too high, the gantry crane cannot meet the construction requirements; 3. For offshore construction and other bridge decks where the gantry crane walking track cannot be installed, the construction requirements cannot be met.

Contents of the invention

In order to overcome the deficiencies of the above technologies, the present invention provides a construction method and construction device for integral binding and hoisting of steel bars in an upward mobile formwork that effectively shortens the construction period and meets the requirements of large span and high clearance.

The technical scheme that the present invention overcomes its technical problem adopts is:

The overall binding and hoisting construction method of the upward mobile formwork steel bar includes the following steps:

a) Concrete is poured at the reinforcement skeleton place in the outer formwork to form a box girder;

b) Carry out equal-strength maintenance, tensioning, grouting and anchoring construction procedures for the poured box girder;

c) While step a) and step b) are being constructed, a mold is set on the concrete box girder that has been poured in the previous hole, and the bottom plate steel bar and web steel bar of the next hole box girder are bound longitudinally on the mold , arranging prestressed steel tendons, assembling internal formwork, binding roof reinforcement and passing steel strands to finally form a reinforcement skeleton, the number of the reinforcement skeleton is the same as the number of box girders required in the mobile formwork;

d) After step a) and step b) are completed, the upward moving formwork advances to the next span through the hole;

e) After the upward mobile formwork is adjusted in place, the steel frame that has been bound is transported from the mold to the upward mobile formwork, and the steel frame is hoisted to the outer formwork by the lifting device;

f) performing step a) to step e) again;

The present invention also includes a construction device for the integral binding and hoisting construction method of upward mobile formwork steel bars, which includes a mold set longitudinally on the concrete box girder, a guide rail II installed longitudinally on the mold, and a mold set on the mold Longitudinal conveying device for transporting the steel skeleton to the rear end of the upward mobile formwork Ⅰ, the longitudinal conveying device set in the upward mobile formwork for longitudinally moving the steel skeleton from the concrete box girder to the upward mobile formwork Device II and the hoisting device for hoisting the steel frame in the upward mobile formwork to the outer formwork, the mold is provided with a groove that matches the shape of the steel frame, and the length of the groove is the same as The sum of the number and length of the required box girders in the upward mobile formwork matches, and the distance between the two side legs on both sides of the rear end of the upward mobile formwork is greater than the width of the steel skeleton.

In order to facilitate the production of steel skeletons in the mold, it also includes guide rails 1 arranged longitudinally on the concrete box girder, a tower crane, and a walking wheel I installed at the lower end of the tower crane. The tower crane is located at the rear end of the mold.

The above-mentioned longitudinal conveying device I includes guide rails II arranged longitudinally on both sides of the upper end of the mold, a lifting truss located at the upper end of the mold, and several jacks respectively installed on both sides of the lower end of the lifting truss. The lower ends of the jacks are equipped with walking wheels II , the tire is slidably arranged on the guide rail II through the walking wheel II, and the steel bar frame is fastened and hung on the lower end of the lifting truss through the screw rod and the nut.

The above-mentioned longitudinal conveying device II includes guide rails III installed longitudinally in the upward mobile formwork and several hoisting trolleys, and a number of walking wheels III are respectively arranged on both sides of the lower end of the hoisting trolleys, and the hoisting trolleys pass through The wheel III is slidably arranged on the guide rail III.

The above-mentioned lifting device includes crossbeam I and crossbeam II arranged laterally at the rear end and front end of the upward mobile formwork, and the beam I and beam II are respectively slidably mounted with crane crane I and crane crane II.

In order to prevent interference, a number of middle legs located in the middle of the two side legs are hingedly installed on the rear end of the upward moving formwork through pin shafts, and the tail end of the oil cylinder is hingedly installed on the upward moving formwork. The head end is hingedly installed on the middle leg, and when the piston rod of the oil cylinder is fully stretched out, the middle leg turns to be parallel to the concrete box girder.

In order to facilitate the movement of the mold, the tire mold is slidably set on the guide rail Ⅰ through the consignment trolley.

The beneficial effects of the present invention are: when pouring the steel frame into a concrete box girder, the process of binding the bottom, web steel bars, arranging prestressed steel beams and assembling the steel frame of the inner mold can be carried out at the same time, so as to facilitate upward movement When the formwork passes through the hole, continue to quickly transport the prepared steel skeleton to the outer formwork. Synchronous operation is realized, and the construction period of each hole can be shortened by about 5 days. Compared with the traditional construction technology, there is no need for gantry cranes, so it meets the requirements of large span, large tonnage and high clearance. It solves the problem that the traditional gantry crane cannot meet the construction requirements when the pier column is too high. At the same time, it is also applicable to the situation where the gantry crane running track cannot be set under the bridge deck such as offshore construction.

Description of drawings

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is a schematic diagram of the cross-sectional structure of A-A in Fig. 1;

Fig. 3 is a schematic diagram of a cross-sectional structure along B-B in Fig. 1;

Fig. 4 is a schematic diagram of the C-direction structure in Fig. 1;

Fig. 5 is a schematic diagram of a D-D cross-sectional structure in Fig. 1;

Fig. 6 is the E-E in Fig. 1 to sectional structure schematic diagram;

In the figure, 1. Concrete box girder 2. Upward mobile formwork 3. Tower crane 4. Mold 5. Consignment trolley 6. Middle outrigger 7. Side outrigger 8. Beam I 9. Beam II 10. Crane I 11. Lifting Crane II 12. Lifting Trolley 13. Guide rail Ⅰ 14. Traveling wheel Ⅰ 15. Lifting truss 16. Guide rail Ⅱ 17. Traveling wheel Ⅱ 18. Steel skeleton 19. Screw 20. Guide rail Ⅲ 21. Traveling wheel Ⅲ 22. Outer formwork.

detailed description

The present invention will be further described below in conjunction with accompanying drawings 1 to 6.

The technical scheme that the present invention overcomes its technical problem adopts is:

The overall binding and hoisting construction method of the upward mobile formwork steel bar includes the following steps:

a) Concrete is poured at the reinforcement skeleton 18 in the outer formwork 22 to form a box girder; b) the poured box girder is subjected to equal-strength maintenance, tensioning, grouting and anchoring construction procedures; c) in step a) And while step b) is being constructed, a mold 4 is set on the concrete box girder that has been poured and formed in the previous hole, and the bottom plate reinforcement, web reinforcement, and prestressed steel of the next hole are bound on the mold 4 along the longitudinal direction. Bundle, assemble the inner mold, bind the roof reinforcement and pass the steel strands to finally form the steel skeleton 18, the number of the steel skeleton 18 is the same as the number of box girders required in the mobile formwork; d) after step a) and step b) are completed, The upward mobile formwork 2 passes through the hole and advances to the next span; e) after the upward mobile formwork 2 is adjusted in place, the steel bar skeleton 18 that has been bound is transported to the upward mobile formwork 2 from the mold 4, and Lifting the reinforcement frame 18 into the outer formwork 22 by means of a lifting device; f) performing steps a) to e) again. When pouring the reinforced skeleton into a concrete box girder, the process of binding the bottom, the web steel bars, arranging the prestressed steel strands and assembling the reinforced skeleton 18 of the inner mold can be carried out at the same time, so that when the upward mobile formwork 2 passes through the hole Continuing to transport the fabricated steel bar skeleton 18 into the outer formwork 22 quickly. Synchronous operation is realized, and the construction period of each hole can be shortened by about 5 days. Compared with the traditional construction technology, there is no need for gantry cranes, so it meets the requirements of large span, large tonnage and high clearance. It solves the problem that the traditional gantry crane cannot meet the construction requirements for hoisting and transporting the steel bar frame 18 when the pier column is too high. At the same time, it is also applicable to the situation where the gantry crane running track cannot be set under the bridge deck such as offshore construction.

The present invention also includes a construction device for the integral binding and hoisting construction method of upward mobile formwork steel bars, including a mold 4 longitudinally arranged on the concrete box girder 1, a guide rail II 16 longitudinally installed on the mold 4, a set The longitudinal conveying device I on the mold 4 is used to transport the steel skeleton 18 to the rear end of the upward mobile formwork 2, and the longitudinal conveying device I installed in the upward mobile formwork 2 is used to longitudinally move the steel skeleton 18 from the concrete box girder 1 The longitudinal conveying device II to the upward mobile formwork 2 and the lifting device for hoisting the steel skeleton 18 in the upward mobile formwork 2 to the outer formwork 22, the mold 4 is provided with the steel skeleton 18 A groove with a matching shape, the length of the groove matches the sum of the lengths of the required box girders in the upward mobile formwork 2, and the distance between the two side legs 7 on both sides of the rear end of the upward mobile formwork 2 Greater than the width of the steel skeleton 18. The steel skeleton 18 to be used is manufactured in the mold 4, and transported to the outer formwork 22 through the longitudinal conveying device I, the longitudinal conveying device II and the hoisting device, so as to realize pouring of box girder concrete, equal-strength maintenance and During tensioning, grouting and anchor sealing, the steel skeleton 18 is manufactured simultaneously, which improves the construction efficiency and meets the requirements of large span and high clearance.

It may also include a guide rail I 13 arranged longitudinally on the concrete box girder 1 , a tower crane 3 and a traveling wheel I 14 installed at the lower end of the tower crane 3 , and the tower crane 3 is located at the rear end of the mold 4 . When the steel frame 18 can be made in the mold 4 by the tower crane 3 , it plays the role of hoisting and speeds up the production efficiency of the steel frame 18 . The tower crane 3 can pass the walking wheel Ⅰ 14 moves vertically along the guide rail I 13, further improving the convenience of use.

The longitudinal conveying device I may have the following structure, which includes guide rails II 16 arranged longitudinally on both sides of the upper end of the mold 4, a lifting truss 15 located at the upper end of the mold 4, and several jacks respectively installed on both sides of the lower end of the lifting truss 15, The lower end of the jack is equipped with traveling wheels II 17, and the mold 4 is slidably arranged on the guide rail II through the traveling wheels II 17 16, the steel bar frame 18 is fastened and hung on the lower end of the lifting truss 15 through the screw rod 19 with nuts. After making the steel bar skeleton 18 in the mold 4, utilize the screw rod 19 to connect and fix the lifting truss 15 and the steel bar skeleton 18 through nuts. Afterwards, the jack drives the lifting truss 15 to rise, and the reinforcement frame 18 is separated from the mold. Lifting truss 15 longitudinally moves to the tail end of upward type movable formwork 2 by traveling wheel II 17 afterwards. And fixing the reinforcement frame 18 on the lifting truss 15 for transportation can improve the overall rigidity of the reinforcement frame 18 .

The longitudinal conveying device II can have the following structure, which includes guide rails III 20 installed in the upward mobile formwork 2 along the longitudinal direction and a number of lifting trolleys 12, and a number of walking wheels III 21 are respectively arranged on both sides of the lower end of the lifting trolley 12 , the hoisting trolley 12 is slidably set on the guide rail III 20 through the traveling wheels III 21 . After the head end of the steel bar skeleton 18 enters the upward mobile formwork 2, the lifting truss is fastened under the lifting trolley 12 through the screw rod 19 using nuts, and gradually moves longitudinally upward in the upward mobile formwork 2, and gradually The hoisting truss 15 is connected and fixed with the rest of the hoisting trolleys 12, and finally the hoisting truss 15 drives the reinforcement frame 18 to vertically move into the upward mobile formwork 2.

The hoisting device may have the following structure, which includes crossbeam I 8 and crossbeam II 9 arranged laterally at the rear end and front end of the upward mobile formwork 2, and the crossbeam I 8 and crossbeam II 9 are respectively slidably installed with crane crane I 10 and Lifting crane Ⅱ 11. After the hoisting trolley 12 transports the reinforcement frame 18 into place, the hoisting crane I 10 and the hoisting crane II 11 hang the two ends of the hoisting truss 15, and move laterally along the beam I 8 and the beam II 9, and finally the reinforcement frame 18 is hoisted to outer formwork 22 to go out, realizes that steel bar skeleton 18 is moved to put in place.

A number of middle legs 6 located in the middle of the two side legs 7 are hingedly mounted on the rear end of the upward mobile formwork 2 through pin shafts, and the tail end of the oil cylinder is hingedly mounted on the upward mobile formwork 2, and its piston rod The head end is hingedly installed on the middle leg 6, and when the piston rod of the oil cylinder is fully stretched out, the middle leg 6 rotates to be parallel to the concrete box girder 1. The middle support leg 6 is driven by the oil cylinder to swing so that the reinforcement skeleton 18 enters without affecting the support strength of the upward moving formwork.

The mold 4 is slidably arranged on the guide rail I 13 by the consignment trolley 5 . Consignment trolley 5 and tower crane 3 share guide rail Ⅰ 13. When the upward moving formwork advances to the next span through the hole, the mold 4 can pass through the completed concrete box girder 1 that the consignment trolley 5 travels longitudinally, so as to continue the construction in the next stage. Convenience is further improved.

Claims (7)

1. null1. a upstroke movable framework steel bar overall binding lifting construction device，It is characterized in that: include longitudinally disposed mold (4) on concrete box girder (1)、Along longitudinally mounted guide rail II (16) on mold (4)、It is arranged at the upper longitudinal conveying device I for framework of steel reinforcement (18) being transported to upstroke movable framework (2) rear end of mold (4)、Be arranged in upstroke movable framework (2) for longitudinal conveying device II that framework of steel reinforcement (18) is longitudinally moved in upstroke movable framework (2) from concrete box girder (1) and for the framework of steel reinforcement (18) in upstroke movable framework (2) is hoisted to the handling apparatus in exterior sheathing (22)，Described mold (4) is provided with the groove matched with framework of steel reinforcement (18) profile，Required box beam quantity length sum matches the length of described groove with in upstroke movable framework (2)，Spacing between two side legs (7) of described upstroke movable framework (2) both sides, rear end is more than the width of framework of steel reinforcement (18)，The construction using this device is: a) framework of steel reinforcement (18) the place casting concrete in exterior sheathing (22) is formed box beam；B) strong health preserving, stretch-draw, mud jacking and the sealing off and covering anchorage working procedure such as the box beam pouring molding is carried out；C) while step a) and step b) is constructed, previous hole is poured mold (4) has been set on the concrete box girder of molding, on mold (4), in next hole box beam baseplate reinforcing bar of colligation along the longitudinal direction, web reinforcement, arrangement prestress steel bundle, assembly, mould, colligation roof steel bar and steel strand ultimately form framework of steel reinforcement (18), and the quantity of described framework of steel reinforcement (18) box beam quantity required with in mobile formwork is identical；D) step a) and step b) construction after, upstroke movable framework (2) via advance to next across；E) after upstroke movable framework (2) is adjusted in place, framework of steel reinforcement (18) complete for colligation is delivered in upstroke movable framework (2) by mold (4), and by boom hoisting, framework of steel reinforcement (18) is hoisted in exterior sheathing (22)；F) step a) to step e) is again performed.
2. Upstroke movable framework steel bar overall binding lifting construction device the most according to claim 1, it is characterized in that: also including longitudinally disposed guide rail I (13) on concrete box girder (1), tower crane (3) and be installed on the road wheel I (14) of tower crane (3) lower end, described tower crane (3) is positioned at the rear end of mold (4).
3. Upstroke movable framework steel bar overall binding lifting construction device the most according to claim 1, it is characterized in that: described longitudinal conveying device I includes the most longitudinally disposed in the guide rail II (16) of mold (4) both sides, upper end, it is positioned at the lifting truss (15) of mold (4) upper end and is respectively arranged in some jack of lifting truss (15) both sides, lower end, the lower end of described jack is provided with road wheel II (17), described mold (4) is slideably positioned on guide rail II (16) by road wheel II (17), framework of steel reinforcement (18) utilizes nut fastening to be hung on the lower end of lifting truss (15) by screw rod (19).
4. Upstroke movable framework steel bar overall binding lifting construction device the most according to claim 1, it is characterized in that: described longitudinal conveying device II includes respectively along longitudinally mounted guide rail III (20) in upstroke movable framework (2) and some travelling jacks (12), the both sides, lower end of described travelling jack (12) are respectively arranged with several rows travelling wheel III (21), and described travelling jack (12) is slideably positioned on guide rail III (20) by road wheel III (21).
5. Upstroke movable framework steel bar overall binding lifting construction device the most according to claim 1, it is characterized in that: described handling apparatus includes being horizontally set at upstroke movable framework (2) rear end and the crossbeam I (8) of front end and crossbeam II (9), described crossbeam I (8) and crossbeam II (9) are slidably fitted with lifting overhead traveling crane I (10) and lifting overhead traveling crane II (11) respectively.
6. Upstroke movable framework steel bar overall binding lifting construction device the most as claimed in any of claims 1 to 5, it is characterized in that: the some middle supporting leg (6) being positioned at two side leg (7) middle position is installed on the rear end of upstroke movable framework (2) by hinge, the tail end of oil cylinder is hinged to be installed on upstroke movable framework (2), its piston rod head end is hinged to be installed on middle supporting leg (6), when the piston rod of oil cylinder all stretches out, described middle supporting leg (6) turns to parallel with concrete box girder (1).
7. Upstroke movable framework steel bar overall binding lifting construction device the most as claimed in any of claims 1 to 5, it is characterised in that: described mold (4) is slideably positioned on guide rail I (13) by consignment trolley (5).