A form hoisting device for bridge construction and a form hoisting method thereof

Abstract

The application discloses a formwork hoisting device for bridge construction and a formwork hoisting method thereof. The formwork hoisting device for bridge construction comprises a walking mechanism, a hanging basket mechanism, a suspension hoisting mechanism and a traveling inner formwork mechanism. The traveling inner formwork mechanism comprises an inner beam, an assembled inner formwork, a traveling track, a traveling support structure and a beam fixing frame. The assembled inner formwork is arranged on the inner beam. The part of the inner beam located on the outer side of the box girder is connected with the suspension hoisting mechanism. One end of the inner beam located in the box girder is fixedly provided with the traveling track. The traveling support structure is in sliding fit with the traveling track and can drive the traveling track to move up and down, so as to drive the assembled inner formwork to switch between the pouring position and the movable position. The beam fixing frame for supporting the traveling track is detachably arranged on the traveling support structure. In the application, the inner beam adopts the mode of outer suspension and inner support, and only the traveling support structure needs to be controlled, so that the control operation is simple. Meanwhile, the anchor hole does not need to be reserved on the top of the box girder, so that the integrity of the cross section of the box girder is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge construction, in particular to a formwork hoisting device for bridge construction and a formwork hoisting method thereof. BACKGROUND

[0002] In the construction of long-span prestressed concrete continuous beams, the hanging basket construction is the mainstream of the non-support construction method. The core process is as follows: first, a zero block is cast on the top of the pier as the construction foundation, the hanging basket is assembled relying on the zero block and the anchoring is completed, then the subsequent operations such as formwork installation and concrete pouring of the beam segment are carried out, after the pouring is completed, the hanging basket is driven to move to the next working position, and the above process is repeated to realize the segmental cantilever pouring and forming of the beam body.

[0003] In order to improve the construction efficiency and applicability of the hanging basket, many improvements have been made in related technologies. For example, patent CN115387244B discloses a formwork for cantilever pouring construction, which includes a joint formwork and two oppositely arranged inner formwork units, the joint formwork is lapped on the upper formwork of the two inner formwork units on both sides, forming a laminated joint structure; the design can adjust the horizontal distance of the inner formwork unit according to the thickness change of the box girder web, and the joint formwork always adapts to the support demand of the joint gap without the need for assembling wooden formworks. However, in this scheme, the inner formwork support beam frame adopts the mode of "one end supported by the hanging basket and the other end fixed by anchoring", which must reserve anchoring hole positions on the already poured box girder, which not only increases the additional procedures such as hole reservation and later plugging, significantly complicating the construction process, but also damages the structural integrity of the top surface of the box girder, weakens the stress performance of the top surface of the box girder, and leaves structural safety hazards.

[0004] Patent CN113417219B discloses a bridge suspension pouring hanging basket box chamber hydraulic inner formwork asynchronous walking system and walking method, by setting up a hanging basket truss system, an inner formwork suspension system, a walking sliding beam and a walking movement system containing a top side formwork walking mechanism and a bottom formwork walking mechanism, the asynchronous walking of the hanging basket truss system and the inner formwork system is realized, the problems of inner formwork installation, walking and demolding are solved, and there is no need to reserve anchoring holes on the top surface of the box girder, which improves the construction safety and efficiency. However, this technology still has obvious deficiencies, as the top formwork, side formwork and bottom formwork all need to be equipped with independent telescopic driving mechanisms, which leads to a complex overall system structure and a large number of parts, not only increasing the equipment maintenance cost, but also having the problem of complicated operation, which is not conducive to the further improvement of construction efficiency.

[0005] In summary, the existing inner formwork support technology of the hanging basket construction has the problems of "damaging the box girder structure by reserving anchoring holes, complex construction process" or "complicated driving mechanism, inconvenient operation", which restricts the improvement of the construction quality and efficiency of long-span prestressed concrete continuous beams. Therefore, it is urgent to develop a formwork hoisting support technology which does not need to reserve anchoring hole positions on the box girder and has a simple structure and is convenient to control and adjust, in order to solve the above existing technical problems. SUMMARY

[0006] In view of the above-mentioned shortcomings of the prior art, the present application provides a formwork hoisting device for bridge construction and a formwork hoisting method thereof.

[0007] To achieve the above object, the present application is implemented by the following technical solutions:

[0008] The formwork hoisting device for bridge construction comprises a walking mechanism, a form basket mechanism, a suspension hoisting mechanism and a traveling inner formwork mechanism. The walking mechanism is installed on a completed box girder. The form basket mechanism is installed on the walking mechanism. A plurality of suspension hoisting mechanisms are symmetrically installed on the form basket mechanism. The traveling inner formwork mechanism comprises an inner beam, an assembled inner formwork, a traveling track, a traveling support structure and a beam fixing frame. The assembled inner formwork is arranged on the inner beam. The part of the inner beam located outside the box girder is connected to the end of the suspension hoisting mechanism away from the form basket mechanism. The end of the inner beam located inside the box girder is fixedly installed with the traveling track. The traveling support structure is installed in the completed box girder. The traveling support structure and the traveling track can slide along the length direction of the inner beam. The traveling support structure is used to drive the traveling track to move up and down, so as to switch the assembled inner formwork between the pouring position and the active position through the inner beam support. The beam fixing frame is detachably installed on the traveling support structure when the traveling support structure drives the traveling track to move to the pouring position. The beam fixing frame is used to support the traveling track.

[0009] In one embodiment, the assembled inner formwork comprises an inner formwork support, an inner formwork framework and an inner formwork panel. The inner formwork framework is fixedly installed on both sides of the inner formwork support. The inner formwork panel is fixedly installed on the outer side of the inner formwork support and the inner formwork framework. The inner formwork support is arranged on the inner beam.

[0010] In one embodiment, the traveling support structure comprises a bottom support frame, a lifting driving element and a traveling support trolley. The bottom support frame is used to abut against the inner bottom wall of the box girder. The lifting driving element is installed on the bottom support frame. The traveling support trolley is installed on the moving end of the lifting driving element. The traveling support trolley is in sliding cooperation with the traveling track. The lifting driving element is used to drive the traveling support trolley to move up and down relative to the bottom support frame, so as to switch the assembled inner formwork between the pouring position and the active position.

[0011] In one embodiment, the traveling support structure further comprises a traveling support frame, a lifting support frame and a lifting frame. The lifting frame is fixedly installed on the moving end of the lifting driving element. The traveling support trolley is fixedly installed on the lifting frame. The traveling support frame is fixedly installed on the bottom support frame. The lifting support frame is fixedly installed on the traveling support frame. The lifting driving element is fixedly installed on the lifting support frame.

[0012] In one of the embodiments, the number of the joist fixing frames is two, the support platforms are formed on the two sides of the traveling support frame, and the two joist fixing frames are respectively installed on the two support platforms so that the lifting support frame, the lifting driving element and the traveling support trolley are located between the two joist fixing frames, and the two joist fixing frames are respectively supported on the traveling tracks on the two sides of the traveling support trolley.

[0013] In one of the embodiments, the traveling support structure further comprises a conforming bottom plate fixed at the bottom of the bottom support frame, and the conforming bottom plate is used to conform to the inner bottom of the box girder.

[0014] In one of the embodiments, the traveling inner mold mechanism further comprises an anchoring structure beam installed on the traveling support structure, and the anchoring structure beam is used to be anchored on the bottom of the box girder.

[0015] In one of the embodiments, the formwork hoisting device for bridge construction further comprises a bottom mold cross beam connected with the suspension hoisting mechanism, and the bottom mold cross beam is used to support the bottom mold; the traveling inner mold mechanism further comprises an anchor rod, one end of the anchor rod passes through the anchoring reserved hole of the bottom of the box girder for fixing the bottom mold cross beam and is anchored on the box girder, and the other end of the anchor rod passes through the traveling support structure and is anchored on the anchoring structure beam.

[0016] In one of the embodiments, the formwork hoisting device for bridge construction further comprises a side joist, the bottom mold cross beam and the side joist are respectively connected with different suspension hoisting mechanisms, the bottom mold cross beam is detachably installed with a bottom mold joist for supporting the bottom mold through a screw rod and a bolt, the side joist is detachably installed with a support framework through a screw rod and a bolt, the support framework is detachably connected with a side mold framework through a screw rod and a bolt, and the side mold framework is fixedly installed with a side mold panel on the inner side.

[0017] In order to better achieve the purpose of the present application, the present application further provides a formwork hoisting method for bridge construction, which is realized by using the formwork hoisting device for bridge construction according to any one of the above embodiments, and the formwork hoisting method for bridge construction comprises the following steps:

[0018] Step one: before pouring a new box girder, installing a traveling support structure in a box girder formed in a previous stage;

[0019] Step two: removing the anchoring of the bottom mold cross beam, controlling the suspension hoisting mechanism and the traveling support structure to drive the inner joist, the side joist and the bottom mold cross beam to move downward, and making the bottom mold, the side mold and the assembled inner mold separate from the formed box girder to a movable position;

[0020] Step three: after controlling the traveling mechanism to drive the side joist, the bottom mold cross beam, the inner joist and the assembled inner mold to move to a next pouring position, removing the anchoring of the traveling support structure, and making the traveling support structure move along the traveling track to one end of the traveling track close to the inner joist;

[0021] Step four: control the traveling support structure and the suspension hoisting mechanism to drive the inner beam to lift the assembled inner formwork to the pouring position, and control the suspension hoisting mechanism to drive the side beam and the bottom beam to lift and reset to the pouring position;

[0022] Step five: install the beam fixing frame for supporting the traveling track on the traveling support structure to support the inner end of the inner beam, and anchor the traveling support structure and the bottom beam through the anchor rod and the anchoring reserved hole on the previous stage box girder for fixing the bottom beam;

[0023] Step six: pour a new box girder section, after the pouring of the new section is completed, the beam fixing frame is removed, and step two is cycled until the pouring of the bridge is completed.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] After the pouring of the box girder is completed, the suspension hoisting mechanism and the traveling support structure are controlled to drive the inner beam and the assembled inner formwork to be separated from the formed box girder to the active position, the suspension hoisting mechanism drives the inner beam and the assembled inner formwork on the inner beam to move to the next pouring position. The anchoring of the traveling support structure is released, and the traveling support structure walks on the traveling track to the position close to the inner beam, the traveling support structure drives the traveling track to drive the assembled inner formwork on the inner beam to move to the pouring position, the beam fixing frame is arranged on the traveling support structure to support the traveling track, and the inner end of the inner beam is stably supported, so that the continuity of the movement of the inner beam and the assembled inner formwork is guaranteed, and the pouring efficiency is guaranteed. Then the traveling support structure is anchored through the anchor rod and the anchoring reserved hole on the box girder for fixing the bottom beam, so that the stability of the inner beam and the assembled inner formwork during pouring is guaranteed. And because of the sliding cooperation between the traveling support structure and the traveling track, the support point can be flexibly adjusted along the length direction of the inner beam, so that the position of the traveling support structure can be adjusted according to the position of the box girder and the inner beam.

[0026] In the present application, the inner beam adopts the mode of outer suspension and inner support, after pouring is completed, the assembled inner formwork does not need to be disassembled, the synchronous movement control of the inner beam and the assembled inner formwork is realized through the cooperation of the suspension hoisting mechanism and the traveling support structure, and the traveling inner formwork mechanism only needs to control the traveling support structure, so that the control operation is simple. At the same time, the box girder does not need to reserve the anchoring reserved hole for supporting the inner end of the inner beam, so that the damage of the newly added hole position to the integrity of the cross section of the box girder is avoided, the integrity of the cross section of the box girder is guaranteed, and the strength of the box girder is guaranteed. At the same time, the anchoring of the traveling support structure is completed by using the existing anchoring reserved hole of the bottom beam of the box girder. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0028] Figure 1 It is a perspective view of a bridge construction formwork device of the present application;

[0029] Figure 2 It is a left view of a bridge construction formwork device of the present application;

[0030] Figure 3 It is a front view of a bridge construction formwork device of the present application;

[0031] Figure 4 It is a perspective view of a traveling inner formwork mechanism of the present application;

[0032] Figure 5 It is an enlarged view of B in the figure; Figure 4

[0033] It is an enlarged view of A in the figure. Figure 6

[0034] It is a schematic view of a bottom formwork beam and its connecting structure; Figure 7

[0035] It is a schematic view of a side formwork beam and its connecting structure; Figure 8 Figure 1 It is an enlarged view of A in the figure.

[0036] The numbers in the figure respectively represent:

[0037] 1, traveling mechanism; 11, track beam; 12, track slide; 13, traveling slide; 2, hanging basket mechanism; 21, diamond-shaped main truss; 22, front cross beam; 23, rear cross beam; 3, suspension hoisting mechanism; 31, crane support; 32, hydraulic jack; 33, hoisting support; 34, steel sling; 4, bottom formwork beam; 41, bottom formwork beam support; 5, side formwork beam; 51, support framework; 52, side formwork framework; 53, side formwork panel; 6, traveling inner formwork mechanism; 61, inner formwork beam; 62, assembled inner formwork; 621, inner formwork support; 622, inner formwork framework; 623, inner formwork panel; 63, traveling track; 64, traveling support structure; 641, bottom support frame; 642, conformable bottom plate; 643, traveling support frame; 644, lifting support frame; 645, lifting driving member; 646, lifting frame; 647, traveling support trolley; 65, anchoring structure beam; 66, formwork beam fixing frame. DETAILED DESCRIPTION

[0038] ​In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] Embodiment one: in some embodiments, referring to the drawings of the specification Figures 1-5 , a bridge construction formwork device comprises a walking mechanism 1, a hanging basket mechanism 2, a suspension hoisting mechanism 3 and a traveling inner formwork mechanism 6, the walking mechanism 1 is installed on the box girder which has been poured and completed, and the hanging basket mechanism 2 is installed on the walking mechanism 1; a plurality of groups of suspension hoisting mechanisms 3 are symmetrically installed on the hanging basket mechanism 2.

[0040] As Figures 3 to 5 shown, specifically, the traveling inner formwork mechanism 6 comprises an inner beam 61, an assembled inner formwork 62, a traveling track 63, a traveling support structure 64 and a beam fixing frame 66; the assembled inner formwork 62 is arranged on the inner beam 61, the inner beam 61 is connected to the end of the suspension hoisting mechanism 3 away from the hanging basket mechanism 2 at the part of the box girder outside, and the inner beam 61 has the traveling track 63 fixedly installed at the end inside the box girder; the traveling support structure 64 is installed in the box girder which has been poured and formed, and the traveling support structure 64 can slide along the length direction of the inner beam 61 with the traveling track 63; the traveling support structure 64 is used to drive the traveling track 63 to move up and down, so as to switch the assembled inner formwork 62 between the pouring position and the active position through the inner beam 61; when the traveling support structure 64 drives the traveling track 63 to move to the pouring position, the beam fixing frame 66 is detachably installed on the traveling support structure 64, and the beam fixing frame 66 is used to support the traveling track 63.

[0041] Referring to Figure 1 , Figure 2 and Figure 6 , in an embodiment, the bridge construction formwork device further comprises a bottom formwork beam 4 and a side beam 5, the bottom formwork beam 4 and the side beam 5 are respectively connected with different suspension hoisting mechanisms 3, the bottom formwork beam 4 is used to support the bottom formwork, and the side beam 5 is used to support the side formwork. As Figure 6 shown, the bottom formwork beam 41 for supporting the bottom formwork is detachably installed on the bottom formwork beam 4 through a screw rod and a bolt. As Figure 7 shown, specifically, four side beams 5 for supporting the side formwork are symmetrically distributed on both sides of the box girder. The support framework 51 is detachably installed on the side beam 5 through a screw rod and a bolt, the side formwork framework 52 is detachably connected with the support framework 51 through a screw rod and a bolt, and the side formwork panel 53 is fixedly installed inside the side formwork framework 52.

[0042] As a preferred embodiment of the present application, as shown in Figure 1 and Figure 2 , the walking mechanism 1 comprises a track beam 11, a track slide 12 and a walking slide 13, the track beam 11 is symmetrically anchored on the box girder which has been cast into shape by anchor rods and bolts, the track beam 11 is fixedly installed with a walking oil cylinder, the track beam 11 is limitingly and slidably installed with the track slide 12 and the walking slide 13, and the track slide 12 is connected with the output end of the walking oil cylinder.

[0043] As shown in Figure 2 , the hanging basket mechanism 2 comprises a rhombic main truss 21, a front cross beam 22 and a rear cross beam 23, the rhombic main truss 21 is fixedly installed on the track slide 12 and the walking slide 13, the front end of the rhombic main truss 21 is fixedly installed with the front cross beam 22, and the middle part of the rhombic main truss 21 is fixedly installed with the rear cross beam 23; when casting, the rear side of the rhombic main truss 21 is anchored on the box girder which has been cast into shape by the connecting frame of anchor rods and bolts. The track beam 11 is used for supporting the overall structure, after casting a new box girder, the track beam 11 is laid on the box girder, and then the track slide 12 and the walking slide 13 cooperate to facilitate the walking of the rhombic main truss 21 along the track beam 11. The weight of the formwork and the cast concrete is supported by the front cross beam 22 and the rear cross beam 23, so that the formwork is kept stable, and the box girder is easily formed.

[0044] As shown in Figure 2 and Figure 8 , in an embodiment, the suspension hoisting mechanism 3 comprises a crane support 31, a hydraulic jack 32, a hoisting support 33 and a steel sling 34, the crane support 31 is fixedly installed on the front cross beam 22 and the rear cross beam 23, the hydraulic jack 32 is fixedly installed on the crane support 31, and the output end of the hydraulic jack 32 is fixedly installed with the hoisting support 33; the hoisting support 33 is fixedly connected with the upper end of the steel sling 34; the lower ends of the plurality of steel slings 34 are respectively fixedly connected with the bottom die cross beam 4, the side support beam 5 and the inner support beam 61.

[0045] Referring to Figures 1 to 5In the present embodiment, after the No. 0 box girder is cast and formed, the travelling mechanism 1 is installed on the box girder, the hanging basket mechanism 2 and the suspension hoisting mechanism 3 are installed on the travelling mechanism 1, the hanging basket mechanism 2 is anchored by bolts, the bottom beam 4 is installed at the lower end of the suspension hoisting mechanism 3, the bottom mould is laid on the bottom beam 4, and the sealing strip is pasted at the joint; the bottom mould elevation is adjusted by the suspension hoisting mechanism 3. One end of the side beam 5 is anchored on the formed box girder by anchor rods and bolts, the other end of the side beam 5 is installed on the suspension hoisting mechanism 3, and then the side mould is installed on the side beam 5. The inner end of the inner beam 61 is fixedly connected with the travelling track 63, the travelling track 63 is anchored on the No. 0 box girder by anchor rods and bolts, and the outer end of the inner beam 61 is supported by the suspension hoisting mechanism 3; then the No. 1 box girder is cast, and it is not necessary to reserve the anchoring reserved hole for supporting the inner end of the inner beam 61 during casting.

[0046] After the No. 1 box girder is cast, the travelling support structure 64 is installed in the No. 0 box girder which has been cast and formed, the travelling support structure 64 supports the travelling track 63 and in turn supports the inner end of the inner beam 61, and the anchoring between the travelling track 63 and the No. 0 box girder is released. The connection between the assembled inner mould 62, the side mould and the bottom mould and the box girder is removed, and then the suspension hoisting mechanism 3 drives the inner beam 61 to move downward together with the travelling support structure 64, so as to drive the assembled inner mould 62 to separate from the box girder. The suspension hoisting mechanism 3 drives the side beam 5 and the bottom beam 4 to move downward, so as to make the side mould and the bottom mould separate from the box girder. After the travelling mechanism 1 drives the side beam 5, the bottom beam 4 and the inner beam 61 to move to the next casting position through the hanging basket mechanism 2 and the suspension hoisting mechanism 3, the travelling support structure 64 is controlled to move to the end of the travelling track 63 which is close to the inner beam 61 along the travelling track 63. Then the travelling support structure 64 and the suspension hoisting mechanism 3 are controlled to drive the inner beam 61 to lift, and the suspension hoisting mechanism 3 drives the side beam 5 and the bottom beam 4 to lift, so as to make the assembled inner mould 62, the side mould and the bottom mould be in the casting position of the No. 2 box girder.

[0047] At this time, the beam fixing frame 66 is installed on the travelling support structure 64, the beam fixing frame 66 is supported on the travelling track 63, or the beam fixing frame 66 is connected with the travelling track 63 by bolts, so as to stably support the inner end of the inner beam 61, thereby guaranteeing the continuity of the movement of the inner beam 61 and the assembled inner mould 62 and guaranteeing the casting efficiency. Then the travelling support structure 64 and the bottom beam 4 located at the inner side are anchored by anchor rods and the anchoring reserved hole for fixing the bottom beam 4 on the No. 1 box girder, so as to make the inner end of the inner beam 61 be connected with the box girder through the travelling track 63, the beam fixing frame 66, the travelling support structure 64, thereby guaranteeing the stability of the inner end of the inner beam 61. During casting, the position of the inner end of the inner beam 61 is stably supported by the beam fixing frame 66 supporting the travelling track 63, and the travelling support structure 64 is anchored by anchor rods and the anchoring reserved hole for fixing the bottom beam 4 on the box girder, thereby guaranteeing the stability of the inner beam 61 and the assembled inner mould 62 during casting.

[0048] When the strength of the cast concrete reaches the design strength, the support beam fixing frame 66 is removed, and the control of the suspension hoisting mechanism 3 and the travel support structure 64 is cyclically performed to drive the inner support beam 61, the side support beam 5 and the bottom beam 4 to move downward, so that the bottom mold, the side mold and the assembled inner mold 62 are separated from the formed box girder to the active position until the pouring of the subsequent segment is completed.

[0049] The inner support beam 61 of the present application adopts the mode of outer suspension and inner support. After pouring is completed, the assembled inner mold 62 is not required to be disassembled, and the synchronous movement control of the inner support beam 61 and the assembled inner mold 62 is realized through the cooperation of the suspension hoisting mechanism 3 and the travel support structure 64, and the travel inner mold mechanism 6 only needs to control the travel support structure 64, so the control operation is simple. At the same time, except for the zero box girder, the remaining box girders do not need to reserve anchor holes for supporting the inner end of the inner support beam 61, avoiding the damage of the newly added hole position to the integrity of the box girder section, ensuring the integrity of the box girder section and the strength of the box girder.

[0050] In some embodiments, as shown in Figure 3 and Figure 4 The assembled inner mold 62 includes an inner mold support 621, an inner mold skeleton 622 and an inner mold panel 623, the inner mold support 621 is fixedly installed on both sides of the inner mold skeleton 622, the inner mold skeleton 622 and the inner mold support 621 are fixedly installed on the outer side of the inner mold panel 623 for box girder forming, and the inner mold support 621 is arranged on the inner support beam 61. The inner mold panel 623 is used for the pouring and forming of concrete, the inner mold support 621 is detachably connected with the inner support beam 61 through bolts, and the inner mold support 621 is supported by the inner support beam 61; the inner mold support 621 supports the inner mold panel 623 through the inner mold skeleton 622.

[0051] Referring to Figures 3 to 5 In an embodiment, the travel support structure 64 includes a bottom support frame 641, a lifting driving member 645 and a travel support trolley 647, the bottom support frame 641 is used for abutting on the inner bottom wall of the box girder, the lifting driving member 645 is installed on the bottom support frame 641, and the moving end of the lifting driving member 645 is installed with the travel support trolley 647; the travel support trolley 647 is in sliding cooperation with the travel track 63, and the lifting driving member 645 is used to drive the travel support trolley 647 to move the travel track 63 up and down relative to the bottom support frame 641, so as to switch the assembled inner mold 62 between the pouring position and the active position. The sliding cooperation of the travel support trolley 647 and the travel track 63 enables the travel support structure 64 to move along the length direction of the inner support beam 61. Specifically, the travel support structure 64 further includes a conforming bottom plate 642, which is fixed on the bottom of the bottom support frame 641 and is used to fit the inner bottom of the box girder.

[0052] Before pouring, the lifting driving member 645 drives the traveling support trolley 647 to drive the traveling track 63, the inner beam 61 and the assembled inner mold 62 to rise, so as to realize the quick switching of the assembled inner mold 62 from the active position to the pouring position. Then, the two beam fixing frames 66 are installed on the bottom support frame 641, and the beam fixing frame 66 is used to stabilize and support the position of the traveling track 63. The traveling support structure 64 and the box girder are anchored through the anchor rod and the anchoring reserved hole on the box girder for supporting the inner bottom mold beam 4, so as to ensure the stability of the inner end of the inner beam 61.

[0053] After pouring is completed, the beam fixing frame 66 is removed, and then the lifting driving member 645 is retracted, and the suspension lifting mechanism 3 is lowered to make the inner beam 61 drive the assembled inner mold 62 to move downward to the active position. After the control of the suspension lifting mechanism 3 moves the assembled inner mold 62 and the inner beam 61 to the next pouring position, the anchoring between the traveling support structure 64 and the box girder is removed. At this time, the inner beam 61 can be fixed in position through the assembled inner mold 62 and the suspension lifting mechanism 3, and since the traveling track 63 is connected with the lifting driving member 645 through the traveling support trolley 647, the lifting driving member 645 is controlled to continue to retract, so that the bottom support frame 641 driven by the lifting driving member 645 can move upward relative to the inner beam 61, so that the conforming bottom plate 642 is separated from the inner bottom wall of the box girder. Then, the bottom support frame 641 is pulled to move the traveling support trolley 647 along the traveling track 63 to the end close to the inner beam 61; then the lifting driving member 645 is reset, so that the conforming bottom plate 642 is again attached to the inner bottom of the box girder, and the support of the inner end of the inner beam 61 is completed.

[0054] In an embodiment, the traveling support structure 64 further comprises a traveling support frame 643, a lifting support frame 644 and a lifting frame 646, the moving end of the lifting driving member 645 is fixedly installed with the lifting frame 646, and the lifting frame 646 is fixedly installed with the traveling support trolley 647; the traveling support frame 643 is fixedly installed on the bottom support frame 641, and the lifting support frame 644 is fixedly installed on the traveling support frame 643; the lifting driving member 645 is fixedly installed on the lifting support frame 644. By arranging the traveling support frame 643, the lifting support frame 644 and the lifting frame 646, more stable installation and connection between the bottom support frame 641, the lifting driving member 645 and the traveling support trolley 647 can be realized.

[0055] Further, the number of the joist fixing frame 66 is two, the two sides of the traveling support frame 643 are formed with support platforms, and the two joist fixing frames 66 are respectively installed on the two support platforms, so that the lifting support frame 644, the lifting driving member 645 and the traveling support trolley 647 are located between the two joist fixing frames 66, and the two joist fixing frames 66 are respectively supported on the traveling rails 63 on the two sides of the traveling support trolley 647. By arranging the two joist fixing frames 66, the stability of supporting the traveling rails 63 can be improved, and the reliability of supporting the inner joist 61 can be further improved.

[0056] In an embodiment, the traveling inner formwork mechanism 6 further comprises an anchoring structure beam 65, which is installed on the traveling support structure 64 and is used for anchoring on the bottom of the box girder. Specifically, the traveling inner formwork mechanism 6 further comprises an anchor rod, one end of the anchor rod penetrates the bottom of the box girder and is used for fixing an anchoring reserved hole of the bottom form beam 4 and anchoring on the box girder, and the other end penetrates the traveling support structure 64 and is anchored on the anchoring structure beam 65. Since the bottom form beam 4 located on the inner side needs to be anchored on the bottom of the box girder, the anchoring reserved hole is utilized, and when anchoring, the one end of the anchor rod can be anchored on the bottom form beam 4, and then after penetrating the anchoring reserved hole of the bottom of the box girder, the anchor rod is anchored on the anchoring structure beam 65. The anchoring structure beam 65 can provide an anchoring position and a platform for the traveling inner formwork mechanism 6, and through the anchoring structure beam 65, the anchoring force can be more uniformly transmitted to the traveling support structure 64. In another embodiment, the anchoring structure beam 65 is detachably installed on the traveling support structure 64, and when the anchoring structure beam 65 is damaged due to anchoring, the anchoring structure beam 65 can be replaced.

[0057] Embodiment three: in some embodiments, as shown in Figures 1-5 as a preferred embodiment of the present application, a hanging formwork method for bridge construction is realized by using the hanging formwork device for bridge construction in any of the above embodiments. Specifically, the hanging formwork method for bridge construction comprises the following steps:

[0058] Step one: before pouring a new box girder, the traveling support structure 64 is installed in the box girder poured and formed in the previous stage. Specifically, the traveling mechanism 1, the form traveler mechanism 2, the suspension hoisting mechanism 3, the bottom form beam 4, the side joist 5 and the inner joist 61 are installed on the zero box girder, and then the bottom form, the side form and the fabricated inner form 62 are sequentially installed; the new box girder is poured; the traveling support structure 64 is installed in the box girder poured and formed in the previous stage, and the anchoring between the traveling rails 63 and the zero box girder is released.

[0059] Step two: the anchoring to the bottom form beam 4 is removed, the suspension hoisting mechanism 3 and the traveling support structure 64 drive the inner joist 61, the side joist 5 and the bottom form beam 4 to move downward, so that the bottom form, the side form and the fabricated inner form 62 are separated from the formed box girder to the active position.

[0060] Step three: after the walking mechanism 1 drives the side beam 5, the bottom beam 4 and the inner beam 61 to move to the next pouring position, the anchoring of the walking support structure 64 is removed, and the walking support structure 64 is moved along the walking track 63 to the end of the walking track 63 close to the inner beam 61. Specifically, the walking support structure 64 can be moved on the walking track 63 by using a hand-operated hoist. Since the inner beam 61 drives the assembled inner form 62 to move to the next pouring position, the inner beam 61 can be positioned by the assembled inner form 62 and the suspension lifting mechanism 3 at this time, the lifting drive 645 is controlled to retract, so that the bottom support frame 641 moves upward relative to the walking track 63 and away from the inner bottom wall of the box girder, thereby facilitating the movement of the walking support structure 64 on the walking track 63 to the end close to the inner beam 61. When the walking support structure 64 is moved to the position, the lifting drive 645 is controlled to extend, so that the bottom support frame 641 is reset to abut on the inner bottom wall of the box girder.

[0061] Step four: the walking support structure 64 and the suspension lifting mechanism 3 drive the inner beam 61 to lift the assembled inner form 62 to reset to the pouring position, and the suspension lifting mechanism 3 drives the side beam 5 and the bottom beam 4 to lift and reset to the pouring position. Specifically, the lifting drive 645 is continuously controlled to move upward synchronously with the suspension lifting mechanism 3 to move the inner beam 61 upward, so as to reset the assembled inner form 62 to the pouring position.

[0062] Step five: the beam fixing frame 66 for supporting the walking track 63 is installed on the walking support structure 64 to support the inner end of the inner beam 61; the walking support structure 64 and the bottom beam 4 are anchored through the anchor rod and the anchoring reserved hole on the previous stage box girder for fixing the inner bottom beam 4.

[0063] Step six: pouring a new box girder segment, after the new segment is poured, the beam fixing frame 66 is removed; the step two is cycled to be executed until the pouring of the bridge is completed.

[0064] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the foregoing embodiments of the present application have been described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hanging formwork device for bridge construction, comprising a walking mechanism (1), a basket mechanism (2), a suspension hoisting mechanism (3) and a traveling inner formwork mechanism (6), characterized in that: the walking mechanism (1) is installed on the box girder which has been poured and completed, and the basket mechanism (2) is installed on the walking mechanism (1); a plurality of groups of suspension hoisting mechanisms (3) are symmetrically installed on the basket mechanism (2); the traveling inner formwork mechanism (6) comprises an inner beam (61), an assembled inner formwork (62), a traveling track (63), a traveling support structure (64) and a beam fixing frame (66); the assembled inner formwork (62) comprises an inner formwork support (621), an inner formwork framework (622) and an inner formwork panel (623), the inner formwork framework (622) is fixedly installed on both sides of the inner formwork support (621), the inner formwork panel (623) is fixedly installed on the outer sides of the inner formwork support (621) and the inner formwork framework (622) and is used for box girder forming, and the inner formwork support (621) is arranged on the inner beam (61); the part of the inner beam (61) located on the outside of the box girder is connected with the end of the suspension hoisting mechanism (3) away from the basket mechanism (2), and the end of the inner beam (61) located in the box girder is fixedly installed with the traveling track (63); the traveling support structure (64) is installed in the box girder which has been poured and formed, and the traveling support structure (64) and the traveling track (63) can slide along the length direction of the inner beam (61), and the traveling support structure (64) is used for driving the traveling track (63) to move up and down, so as to switch the assembled inner formwork (62) between the pouring position and the active position through the inner beam (61). When the traveling support structure (64) drives the traveling track (63) to move to the pouring position, the traveling support structure (64) is detachably provided with a joist fixing frame (66), and the joist fixing frame (66) is used for supporting the traveling track (63); the traveling support structure (64) comprises a bottom support frame (641), a lifting driving element (645), a traveling support trolley (647), a traveling support frame (643), a lifting support frame (644), a lifting frame (646) and a conforming bottom plate (642), the bottom of the bottom support frame (641) is used for abutting against the inner bottom wall of the box girder, the lifting driving element (645) is installed on the bottom support frame (641), and the moving end of the lifting driving element (645) is provided with the traveling support trolley (647); the traveling support trolley (647) is in sliding fit with the traveling track (63), the lifting driving element (645) is used for driving the traveling support trolley (647) to drive the traveling track (63) to move up and down relative to the bottom support frame (641), so that the prefabricated inner mold (62) is switched between the pouring position and the movable position; the moving end of the lifting driving element (645) is fixedly provided with the lifting frame (646), and the lifting frame (646) is fixedly provided with the traveling support trolley (647); the traveling support frame (643) is fixedly installed on the bottom support frame (641), and the lifting support frame (644) is fixedly installed on the traveling support frame (643); the lifting driving element (645) is fixedly installed on the lifting support frame (644); and the conforming bottom plate (642) is fixed at the bottom of the bottom support frame (641) and is used for being attached to the inner bottom of the box girder.

2. The formwork hoisting device for bridge construction according to claim 1, characterized in that The number of the joist fixing frame (66) is two, the two sides of the traveling support frame (643) are formed with support platforms, and the two joist fixing frames (66) are installed on the two support platforms, so that the lifting support frame (644), the lifting driving element (645) and the traveling support trolley (647) are located between the two joist fixing frames (66), and the two joist fixing frames (66) are supported on the traveling tracks (63) on the two sides of the traveling support trolley (647).

3. The form traveler of claim 2 wherein: The traveling inner mold mechanism (6) further comprises an anchoring structure beam (65), the anchoring structure beam (65) is installed on the traveling support structure (64), and the anchoring structure beam (65) is used for being anchored on the bottom of the box girder.

4. The form traveler of claim 3, wherein: The formwork hoisting device for bridge construction further comprises a bottom mold cross beam (4), the bottom mold cross beam (4) is connected with the suspension hoisting mechanism (3), and the bottom mold cross beam (4) is used for supporting the bottom mold; the traveling inner mold mechanism (6) further comprises an anchor rod, one end of the anchor rod passes through an anchoring reserved hole of the bottom of the box girder for fixing the bottom mold cross beam (4) and is anchored on the box girder, and the other end of the anchor rod passes through the traveling support structure (64) and is anchored on the anchoring structure beam (65).

5. The form traveler of claim 4 wherein: The side support beam (5) is connected with the different suspension hoisting mechanisms (3) respectively, and the bottom die cross beam (4) and the side support beam (5); the bottom die support beam (41) for supporting the bottom die is detachably installed on the bottom die cross beam (4) through a screw rod and a bolt; the support framework (51) is detachably installed on the side support beam (5) through a screw rod and a bolt, the side die framework (52) is detachably connected with the support framework (51) through a screw rod and a bolt, and the side die panel (53) is fixedly installed on the inner side of the side die framework (52).

6. A method for constructing a bridge by using the bridge construction formwork device according to claim 5, wherein The bridge construction formwork removing method comprises the following steps: Step one: before pouring a new box girder, the walking support structure (64) is installed in the box girder formed in the previous stage; Step two: the anchoring of the bottom die cross beam (4) is removed, the suspension hoisting mechanism (3) and the walking support structure (64) drive the inner support beam (61), the side support beam (5) and the bottom die cross beam (4) to move downward, so that the bottom die, the side die and the assembled inner formwork (62) are separated from the formed box girder to the active position; Step three: after the walking mechanism (1) drives the side support beam (5), the bottom die cross beam (4), the inner support beam (61) and the assembled inner formwork (62) to move to the next pouring position, the anchoring of the walking support structure (64) is removed, so that the walking support structure (64) moves to the end of the walking track (63) close to the inner support beam (61); Step four: the walking support structure (64) and the suspension hoisting mechanism (3) drive the inner support beam (61) to lift the assembled inner formwork (62) to reset to the pouring position, and the suspension hoisting mechanism (3) drives the side support beam (5) and the bottom die cross beam (4) to lift and reset to the pouring position; Step five: the support beam fixing frame (66) for supporting the walking track (63) is installed on the walking support structure (64) to support the inner end of the inner support beam (61); the walking support structure (64) and the bottom die cross beam (4) are anchored through the anchor rod and the anchoring reserved hole for fixing the bottom die cross beam (4) on the box girder in the previous stage; Step six: a new box girder section is poured, after the pouring of the new section is completed, the support beam fixing frame (66) is removed, and step two is circularly executed until the pouring of the bridge is completed.

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