CN112482241A - Walking type hanging bracket for post-pouring section of box girder flange plate and construction method thereof - Google Patents
Walking type hanging bracket for post-pouring section of box girder flange plate and construction method thereof Download PDFInfo
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Abstract
本发明公开了箱梁翼缘板后浇段行走式吊架及其施工方法，包括主梁，所述主梁通过工字钢前后对称连接在一起，主梁上设置有平杆、行走小车、前支点与操作平台，所述平杆焊接安装固定于两主梁底部，所述行走小车通过销轴销接固定于主梁底部平杆上，行走小车底部对称放置有内轨道，所述前支点通过斜撑及平杆焊接于主梁底部中间，前支点底部对称放置有外轨道，所述操作平台通过螺栓连接安装固定于主梁顶部右侧。本发明有效解决了超出塔吊范围块段吊架及模板无法拆装的问题，合理组织，细化工序，很好的提高施工效率，减少成本。
The invention discloses a walking hanger of a post-casting section of a box girder flange plate and a construction method thereof, including a main beam, the main beams are symmetrically connected front and rear through I-beams, and a flat rod, a walking trolley and a front fulcrum are arranged on the main beam. With the operating platform, the flat rod is welded and fixed on the bottom of the two main beams, the walking trolley is fixed on the flat rod at the bottom of the main beam through the pin shaft, and the inner rail is symmetrically placed at the bottom of the walking trolley, and the front fulcrum passes through the inclined plane. The bracing and the flat rod are welded in the middle of the bottom of the main beam, the outer rail is symmetrically placed at the bottom of the front fulcrum, and the operating platform is installed and fixed on the right side of the top of the main beam by bolting. The invention effectively solves the problem that the block hanger and the formwork cannot be disassembled and assembled beyond the scope of the tower crane, rationally organizes and refines the process, greatly improves the construction efficiency and reduces the cost.
Description
Technical Field
The invention relates to a walking type hanging bracket for a post-cast section of a box girder flange plate and a construction method thereof, belonging to the technical field of bridge construction equipment.
Background
The post-cast strip is a harmful crack which is possibly generated due to the fact that the cast-in-place reinforced concrete structure shrinks unevenly or settles unevenly in the building construction process. At present, a single-box three-chamber large-cantilever variable-cross-section PC continuous box girder is adopted in the existing main bridge box girder construction, a post-cast strip cantilever is long, the thickness of the plate is thin, meanwhile, the midspan part block section of the main bridge box girder exceeds the range of a tower crane, and no hoisting machinery is used in the construction. In order to solve the problems, a new technical scheme is provided.
Disclosure of Invention
The invention aims to provide a walking type hanging bracket for a post-cast section of a box girder flange plate and a construction method thereof, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme: the box girder flange plate post-cast section walking type hanging bracket comprises a girder, the girder is symmetrically connected together through I-shaped steel in the front and back direction, a flat bar, a walking trolley, a front support and an operating platform are arranged on the girder, the flat bar is welded and fixed at the bottoms of two girders, the walking trolley is fixed on the flat bar at the bottom of the girder through a pin joint of a pin shaft, inner rails are symmetrically placed at the bottom of the walking trolley, a front support point is welded in the middle of the bottom of the girder through an inclined strut and the flat bar, outer rails are symmetrically placed at the bottom of the front support point, and the operating platform is fixed at the right side of.
Preferably, the inner rail is fixed on the inner side of the top of the box girder through bolts, and the outer rail is fixed on the outer side of the top of the box girder through bolts.
Preferably, the hanging strip is fixedly installed on the right side of the top of the main beam through a channel steel and a pin shaft, a longitudinal beam is placed below the hanging strip, a lower channel steel and a truss are arranged on the longitudinal beam, the lower channel steel is symmetrically installed and fixed on two sides of the bottom of the longitudinal beam through bolts, the truss is installed and fixed on the top of the longitudinal beam through I-shaped steel, a safety protection platform and a template are arranged on the truss, the safety protection platform is installed and fixed on the right side of the top of the truss through bolts, and the template is installed and fixed on.
Preferably, the channel-section steel is connected with the suspender through the round pin axle under the right side, and the channel-section steel is connected with the stock through the nut under the left side, the stock top is connected in the case roof beam top outside through the nut.
Preferably, the distance between the walking trolleys is 6 meters, the distance between the front supporting points is 4.8 meters, and the walking trolleys are formed by mutually connecting and combining an upper supporting frame, a cross support and a wheel carrier assembly through pin shafts.
The construction method of the walking type hanging bracket for the post-cast section of the box girder flange plate comprises the following steps:
(1) pre-burying of an embedded part: the anchor rod and the suspender pre-embedded hole of the post-cast strip hanger are pre-embedded before the main bridge box girder construction, and the vertical pre-stressed finish-rolled deformed steel bar is arranged at the web plate of the main bridge hanging basket, so that the track anchoring finish-rolled deformed steel bar is not required to be embedded;
(2) installing a track: setting a track pad beam at a lofting and track-exiting position on the top of a box girder by one meter, accurately placing a track, extending the box girder vertical finish-rolled deformed steel bar to penetrate through a track pressing beam to anchor the track, setting at least four track pressing beams, setting two tracks to the inner sides of two main girders by a transverse bridge, and setting one track on the outer sides of the main girders respectively;
(3) the walking trolley and the front supporting point are arranged: a travelling trolley is arranged on a track on the inner side of a box girder of the longitudinal bridge, a front pivot is arranged on a track on the outer side, and the distance between the two travelling trolleys and the two front pivots is 6 meters;
(4) and (3) flat bar installation: a flat rod is arranged on the traveling trolley and the front fulcrum, the flat rod on the trolley is provided with a hole and is in pin joint with the traveling trolley, and the front fulcrum is in full-welding connection with the flat rod;
(5) main beam installation: installing main beams on a flat bar, accurately lofting the positions of two main beams on the flat bar and placing the main beams, connecting the two main beams into a whole by adopting a parallel-connection inclined strut, then installing an upper cross beam at the tail ends of the two main beams and anchoring the upper cross beam on a box girder top plate by penetrating finish-rolled deformed steel bars, and arranging a pad beam below the main beam on the edge of a cast box girder flange plate to reduce the cantilever length of the main beam and optimize the stress of the main beam;
(6) and (3) mounting a lower cross beam: mounting a hanging strip at the end part of a cantilever of a main beam, mounting a finish rolling deformed steel bar suspender at the position of an embedded part of a flange plate of a box girder, and then respectively mounting lower cross beams at the positions of the suspender and the hanging strip;
(7) bottom basket installation: paving longitudinal beams on the lower cross beam and welding and fixing the longitudinal beams, and then paving distribution beams on the longitudinal beams according to the designed interval and welding and fixing the distribution beams;
(8) installing a template: fixing the template and the truss together, laying the template and the truss on the distribution beam according to the designed interval and welding and fixing the template and the truss;
when concrete is poured, the tail end of a main beam is anchored on a box girder top plate by adopting finish-rolled deformed steel bars, the middle of the main beam is supported by adopting a fulcrum and a backing beam, a cantilever at the front end of the main beam lifts the outer side of a bottom basket by using a hanging strip, the inner side of the bottom basket is anchored on the concrete by adopting the finish-rolled deformed steel bars, a wing plate post-cast strip truss and a template are arranged on the bottom basket, the height of the suspender is adjusted according to the designed elevation, the elevation of the wing plate post-cast strip is ensured to meet the requirement, and no slab staggering;
pushing and walking by using a jack, splitting 0# post-cast strip hanging brackets on each side into two, walking independently, synchronously walking hanging brackets on two sides, lifting and hanging the outer side of a bottom basket when the post-cast strip hanging brackets walk, lifting and hanging the inner side of the bottom basket by using a lower beam for walking, anchoring a lower beam longitudinal bridge for walking on a main beam by adopting finish-rolled deformed steel bars to the outer side, lifting and hanging the longitudinal bridge on a sliding hanging bracket by adopting a hole pre-embedded in a post-cast strip to penetrate through the finish-rolled deformed steel bars to the inner side, dismounting a backing beam, loosening the tail end of the main beam for anchoring and finish-rolling steel, anchoring the longitudinal bridge on a track by adopting a walking trolley, pushing the walking hanging brackets by using the jack at the front fulcrum position, fixing the post-cast strip on a box beam.
Compared with the prior art, the invention has the beneficial effects that: the hanging bracket is designed to be a walking type, so that compared with a common detachable hanging bracket, the manpower and material resources are saved, and the normal construction can be realized without a hoisting equipment block in the midspan; the hanging bracket can be connected with a lower flat rod of the main bridge hanging basket and travels together with the main bridge hanging basket, so that the traveling construction process of the post-cast strip hanging bracket is saved; the walking trolley is designed to be movably connected by three pins in a pin mode, and the transverse bridge of the walking trolley can swing in the axial direction so as to ensure that the wheels of the walking trolley are stressed uniformly; by combining the method, the problem that the hanging bracket and the template of the block section beyond the range of the tower crane cannot be disassembled and assembled is effectively solved, the working procedures are reasonably organized and refined, the construction efficiency is well improved, and the cost is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a side view of the walking trolley of the present invention;
FIG. 4 is a schematic structural view of the walking trolley of the present invention;
in the figure: 1-a main beam; 2-a flat bar; 3-a walking trolley; 4-front pivot; 5-operating the platform; 6-inner orbit; 7-diagonal bracing; 8-outer orbit; 9-a sling; 10-longitudinal beams; 11-lower channel steel; 12-a truss; 13-a safety protection platform; 14-a template; 15-anchor rod; 16-upper support frame; 17-a cross brace; 18-a wheel carriage assembly; 19-pin shaft.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1-4, the rear pouring section walking type hanger for the flange plate of the box girder comprises main girders 1, the main girders 1 are symmetrically connected together in the front and back direction through i-shaped steel, a flat bar 2, a walking trolley 3, a front support point 4 and an operating platform 5 are arranged on the main girders 1, the flat bar 2 is welded and fixed at the bottoms of the two main girders 1, the walking trolley 3 is fixed on the flat bar 2 at the bottom of the main girder 1 through a pin joint, inner rails 6 are symmetrically placed at the bottom of the walking trolley 3, the front support point 4 is welded in the middle of the bottom of the main girder 1 through an inclined strut 7 and the flat bar 2, outer rails 8 are symmetrically placed at the bottom of the front support point 4, the operating platform 5 is fixed at the right side of the top of the main girders 1 through a bolt joint, the inner rails 6 are fixed at the inner side of the top of the box girder, longeron 10 has been placed to suspender 9 below, be provided with down channel-section steel 11 and truss 12 on the longeron 10, lower channel-section steel 11 is fixed in longeron 10 bottom both sides through the installation of bolt symmetry, truss 12 is fixed in longeron 10 top through the installation of worker's shaped steel, be provided with safety protection platform 13 and template 14 on the truss 12, safety protection platform 13 is fixed in truss 12 top right side through the bolt installation, template 14 is fixed in truss 12 top through the bolt installation, channel-section steel 11 is connected with suspender 9 through the round pin axle under the right side, channel-section steel 11 is connected with stock 15 through the nut under the left side, 15 tops of stock are connected in the roof beam top outside through the nut, the interval of walking dolly 3 is 6 meters, the interval of front fulcrum 4 is 4.8 meters, walking dolly 3 is by upper bracket 16, cross.
The construction method of the walking type hanging bracket for the post-cast section of the box girder flange plate comprises the following steps:
selecting a post-cast strip hanger material; the post-cast strip hanger main beam adopts single-spliced HN 700X 300 section steel, the parallel inclined strut adopts 20a section steel, the upper beam adopts 2[32a and 2[20a section steel, the distribution beam adopts I20a section steel, the upright post adopts 2I20a section steel, and the inclined pull strip adopts I20a section steel.
(1) pre-burying of an embedded part: the anchor rod and the suspender pre-embedded hole of the post-cast strip hanger are pre-embedded before the main bridge box girder construction, and the vertical pre-stressed finish-rolled deformed steel bar is arranged at the web plate of the main bridge hanging basket, so that the track anchoring finish-rolled deformed steel bar is not required to be embedded;
(2) installing a track: setting a track pad beam at a lofting and track-exiting position on the top of a box girder by one meter, accurately placing a track, extending the box girder vertical finish-rolled deformed steel bar to penetrate through a track pressing beam to anchor the track, setting at least four track pressing beams, setting two tracks to the inner sides of two main girders by a transverse bridge, and setting one track on the outer sides of the main girders respectively;
(3) the walking trolley and the front supporting point are arranged: a travelling trolley is arranged on a track on the inner side of a box girder of the longitudinal bridge, a front pivot is arranged on a track on the outer side, and the distance between the two travelling trolleys and the two front pivots is 6 meters;
(4) and (3) flat bar installation: a flat rod is arranged on the traveling trolley and the front fulcrum, the flat rod on the trolley is provided with a hole and is in pin joint with the traveling trolley, and the front fulcrum is in full-welding connection with the flat rod;
(5) main beam installation: installing main beams on a flat bar, accurately lofting the positions of two main beams on the flat bar and placing the main beams, connecting the two main beams into a whole by adopting a parallel-connection inclined strut, then installing an upper cross beam at the tail ends of the two main beams and anchoring the upper cross beam on a box girder top plate by penetrating finish-rolled deformed steel bars, and arranging a pad beam below the main beam on the edge of a cast box girder flange plate to reduce the cantilever length of the main beam and optimize the stress of the main beam;
(6) and (3) mounting a lower cross beam: mounting a hanging strip at the end part of a cantilever of a main beam, mounting a finish rolling deformed steel bar suspender at the position of an embedded part of a flange plate of a box girder, and then respectively mounting lower cross beams at the positions of the suspender and the hanging strip;
(7) bottom basket installation: paving longitudinal beams on the lower cross beam and welding and fixing the longitudinal beams, and then paving distribution beams on the longitudinal beams according to the designed interval and welding and fixing the distribution beams;
(8) installing a template: fixing the template and the truss together, laying the template and the truss on the distribution beam according to the designed interval and welding and fixing the template and the truss;
when concrete is poured, the tail end of a main beam is anchored on a box girder top plate by adopting finish-rolled deformed steel bars, the middle of the main beam is supported by adopting a fulcrum and a backing beam, a cantilever at the front end of the main beam lifts the outer side of a bottom basket by using a hanging strip, the inner side of the bottom basket is anchored on the concrete by adopting the finish-rolled deformed steel bars, a wing plate post-cast strip truss and a template are arranged on the bottom basket, the height of the suspender is adjusted according to the designed elevation, the elevation of the wing plate post-cast strip is ensured to meet the requirement, and no slab staggering;
pushing and walking by using a jack, splitting 0# post-cast strip hanging brackets on each side into two, walking independently, synchronously walking hanging brackets on two sides, lifting and hanging the outer side of a bottom basket when the post-cast strip hanging brackets walk, lifting and hanging the inner side of the bottom basket by using a lower beam for walking, anchoring a lower beam longitudinal bridge for walking on a main beam by adopting finish-rolled deformed steel bars to the outer side, lifting and hanging the longitudinal bridge on a sliding hanging bracket by adopting a hole pre-embedded in a post-cast strip to penetrate through the finish-rolled deformed steel bars to the inner side, dismounting a backing beam, loosening the tail end of the main beam for anchoring and finish-rolling steel, anchoring the longitudinal bridge on a track by adopting a walking trolley, pushing the walking hanging brackets by using the jack at the front fulcrum position, fixing the post-cast strip on a box beam.
The hanging bracket is designed to be a walking type, so that compared with a common detachable hanging bracket, the manpower and material resources are saved, and the normal construction can be realized without a hoisting equipment block in the midspan; the hanging bracket can be connected with a lower flat rod of the main bridge hanging basket and travels together with the main bridge hanging basket, so that the traveling construction process of the post-cast strip hanging bracket is saved; the walking trolley is designed to be movably connected by three pins in a pin mode, and the transverse bridge of the walking trolley can swing in the axial direction so as to ensure that the wheels of the walking trolley are stressed uniformly; by combining the method, the problem that the hanging bracket and the template of the block section beyond the range of the tower crane cannot be disassembled and assembled is effectively solved, the working procedures are reasonably organized and refined, the construction efficiency is well improved, and the cost is reduced.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that variations, modifications, substitutions and alterations can be made in the embodiment without departing from the principles and spirit of the invention.
Claims (5)
1. Case roof beam flange board post-cast section walking gallows, including girder (1), its characterized in that: girder (1) through I-steel front and back symmetrical connection together, be provided with flat bar (2), walking dolly (3), preceding fulcrum (4) and operation platform (5) on girder (1), flat bar (2) welded mounting is fixed in two girder (1) bottoms, walking dolly (3) are fixed in girder (1) bottom flat bar (2) through round pin axle pin joint on, and inner rail (6) have been placed to walking dolly (3) bottom symmetry, preceding fulcrum (4) weld in the middle of girder (1) bottom through bracing (7) and flat bar (2), and outer track (8) have been placed to preceding fulcrum (4) bottom symmetry, operation platform (5) are fixed in girder (1) top right side through bolted connection installation.
2. The box girder flange plate post-cast section walking hanger of claim 1, characterized in that: the inner rail (6) is fixedly mounted on the inner side of the top of the box girder through bolts, the outer rail (8) is fixedly mounted on the outer side of the top of the box girder through bolts, hanging strips (9) are fixedly mounted on the right side of the top of the main girder (1) through channel steel and pin shafts, longitudinal girders (10) are placed below the hanging strips (9), lower channel steel (11) and a truss (12) are arranged on the longitudinal girders (10), the lower channel steel (11) is symmetrically mounted and fixed on two sides of the bottom of the longitudinal girders (10) through bolts, the truss (12) is fixedly mounted on the top of the longitudinal girders (10) through I-shaped steel, a safety protection platform (13) and a template (14) are arranged on the truss (12), the safety protection platform (13) is fixedly mounted on the right side of the top of the truss (12) through bolts, and the template.
3. The box girder flange plate post-cast section walking hanger of claim 2, wherein: channel-section steel (11) are connected with suspender (9) through round pin axle under the right side, and channel-section steel (11) are connected with stock (15) through the nut under the left side, stock (15) top is connected in the case roof beam top outside through the nut.
4. The box girder flange plate post-cast section walking hanger of claim 3, wherein: the walking trolley (3) is characterized in that the distance between the walking trolley (3) and the front supporting point (4) is 6 meters, the distance between the front supporting points (4) is 4.8 meters, and the walking trolley (3) is formed by mutually connecting and combining an upper supporting frame (16), a cross support (17) and a wheel carrier assembly (18) through a pin shaft (19).
5. The construction method of the walking type hanging bracket for the post-cast section of the box girder flange plate is characterized by comprising the following steps of:
step 1, mounting a post-cast strip hanger;
(1) pre-burying of an embedded part: the anchor rod and the suspender pre-embedded hole of the post-cast strip hanger are pre-embedded before the main bridge box girder construction, and the vertical pre-stressed finish-rolled deformed steel bar is arranged at the web plate of the main bridge hanging basket, so that the track anchoring finish-rolled deformed steel bar is not required to be embedded;
(2) installing a track: setting a track pad beam at a lofting and track-exiting position on the top of a box girder by one meter, accurately placing a track, extending the box girder vertical finish-rolled deformed steel bar to penetrate through a track pressing beam to anchor the track, setting at least four track pressing beams, setting two tracks to the inner sides of two main girders by a transverse bridge, and setting one track on the outer sides of the main girders respectively;
(3) the walking trolley and the front supporting point are arranged: a travelling trolley is arranged on a track on the inner side of a box girder of the longitudinal bridge, a front pivot is arranged on a track on the outer side, and the distance between the two travelling trolleys and the two front pivots is 6 meters;
(4) and (3) flat bar installation: a flat rod is arranged on the traveling trolley and the front fulcrum, the flat rod on the trolley is provided with a hole and is in pin joint with the traveling trolley, and the front fulcrum is in full-welding connection with the flat rod;
(5) main beam installation: installing main beams on a flat bar, accurately lofting the positions of two main beams on the flat bar and placing the main beams, connecting the two main beams into a whole by adopting a parallel-connection inclined strut, then installing an upper cross beam at the tail ends of the two main beams and anchoring the upper cross beam on a box girder top plate by penetrating finish-rolled deformed steel bars, and arranging a pad beam below the main beam on the edge of a cast box girder flange plate to reduce the cantilever length of the main beam and optimize the stress of the main beam;
(6) and (3) mounting a lower cross beam: mounting a hanging strip at the end part of a cantilever of a main beam, mounting a finish rolling deformed steel bar suspender at the position of an embedded part of a flange plate of a box girder, and then respectively mounting lower cross beams at the positions of the suspender and the hanging strip;
(7) bottom basket installation: paving longitudinal beams on the lower cross beam and welding and fixing the longitudinal beams, and then paving distribution beams on the longitudinal beams according to the designed interval and welding and fixing the distribution beams;
(8) installing a template: fixing the template and the truss together, laying the template and the truss on the distribution beam according to the designed interval and welding and fixing the template and the truss;
step 2, pouring concrete of the post-pouring belt;
when concrete is poured, the tail end of a main beam is anchored on a box girder top plate by adopting finish-rolled deformed steel bars, the middle of the main beam is supported by adopting a fulcrum and a backing beam, a cantilever at the front end of the main beam lifts the outer side of a bottom basket by using a hanging strip, the inner side of the bottom basket is anchored on the concrete by adopting the finish-rolled deformed steel bars, a wing plate post-cast strip truss and a template are arranged on the bottom basket, the height of the suspender is adjusted according to the designed elevation, the elevation of the wing plate post-cast strip is ensured to meet the requirement, and no slab staggering;
step 3, the post-cast strip hanger moves;
pushing and walking by using a jack, splitting 0# post-cast strip hanging brackets on each side into two, walking independently, synchronously walking hanging brackets on two sides, lifting and hanging the outer side of a bottom basket when the post-cast strip hanging brackets walk, lifting and hanging the inner side of the bottom basket by using a lower beam for walking, anchoring a lower beam longitudinal bridge for walking on a main beam by adopting finish-rolled deformed steel bars to the outer side, lifting and hanging the longitudinal bridge on a sliding hanging bracket by adopting a hole pre-embedded in a post-cast strip to penetrate through the finish-rolled deformed steel bars to the inner side, dismounting a backing beam, loosening the tail end of the main beam for anchoring and finish-rolling steel, anchoring the longitudinal bridge on a track by adopting a walking trolley, pushing the walking hanging brackets by using the jack at the front fulcrum position, fixing the post-cast strip on a box beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011588953.6A CN112482241A (en) | 2020-12-29 | 2020-12-29 | Walking type hanging bracket for post-pouring section of box girder flange plate and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011588953.6A CN112482241A (en) | 2020-12-29 | 2020-12-29 | Walking type hanging bracket for post-pouring section of box girder flange plate and construction method thereof |
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| CN112482241A true CN112482241A (en) | 2021-03-12 |
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Cited By (1)
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| CN114673093A (en) * | 2022-03-29 | 2022-06-28 | 日照公路建设有限公司 | Temporary fixing device and method for rear end of steel-concrete joint section hoisting construction |
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|---|---|---|---|---|
| CN114673093A (en) * | 2022-03-29 | 2022-06-28 | 日照公路建设有限公司 | Temporary fixing device and method for rear end of steel-concrete joint section hoisting construction |
| CN114673093B (en) * | 2022-03-29 | 2024-03-15 | 山东交工建设集团有限公司 | A temporary fixing device and method for the rear end of the hoisting construction of the steel-concrete combined section |
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Application publication date: 20210312 |