CN215593730U - Hanging basket for parasitic support with beam plate on wide body of cable-stayed bridge with cantilever pouring double-side box - Google Patents
Hanging basket for parasitic support with beam plate on wide body of cable-stayed bridge with cantilever pouring double-side box Download PDFInfo
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- CN215593730U CN215593730U CN202122279979.9U CN202122279979U CN215593730U CN 215593730 U CN215593730 U CN 215593730U CN 202122279979 U CN202122279979 U CN 202122279979U CN 215593730 U CN215593730 U CN 215593730U
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Abstract
The utility model discloses a parasitic support hanging basket with a wide beam plate of a cantilever-cast double-side box cable-stayed bridge, which comprises a base platform, a front supporting point system and/or a rear supporting point system, wherein the front supporting point system and/or the rear supporting point system are/is connected with the base platform, the base platform is hung below the front end of a cast concrete box beam, the parasitic support hanging basket also comprises a steel pipe support system parasitic between double-side boxes on two sides and on the belly of the hanging basket on the base platform, and the steel pipe support system is formed by assembling detachable bowl buckle supports. The wide body between the side boxes on the two sides of the cable-stayed bridge is cast by utilizing the steel pipe support system in a cantilever manner, the support is detached when the hanging basket moves forwards, the next piece is reassembled and cast after the hanging basket moves forwards in place, the construction process of the hanging basket cantilever casting of the whole main beam of the cable-stayed bridge is realized, the lifting amplitude of the hanging basket is small, the construction is safe, and the traffic navigation under the bridge is not influenced.
Description
Technical Field
The utility model relates to the field of bridge engineering construction, in particular to a wide-body parasitic support hanging basket with beam plates for a cable-stayed bridge cast by a cantilever, which aims at a main beam large-span structure comprising two side box beams, a middle connecting top plate and a middle connecting cross beam when the cantilever construction of a main beam hanging basket of the cable-stayed bridge is carried out.
Background
The high-altitude bridge is generally constructed at a section of a pier top block No. 0, hanging baskets are arranged at two ends of the high-altitude bridge in a cantilever casting mode, a bridge body box girder is cast, after one section of the box girder is finished, the hanging baskets are moved downwards for 20-30cm to be demoulded, and after the demoulded box girder is integrally moved forwards and lifted in place, the next section of the box girder is constructed. Double-tower double-cable-side wide body type cable-stayed bridge girder structure, the whole width of the bridge deck is large, the structural form of a double-side box + an intermediate connection top plate + an intermediate connection crossbeam is generally adopted, the conventional hanging basket cannot be suitable for the cantilever casting construction of the novel bridge structure, the hanging basket is blocked by the intermediate crossbeam, the hanging basket is required to move forwards to descend to a certain distance below a transverse partition beam together with an upper support of the hanging basket, and the hanging basket base is lifted after the hanging basket moves forwards to a position so as to carry out the construction of a next section of girder. Therefore, the hanging basket base is large in lifting amplitude, unstable in gravity center, and very unsafe, and construction is influenced. Meanwhile, if the clearance under the bridge is insufficient, the traffic navigation is also influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide a parasitic support hanging basket for a wide body of a cantilever casting double-side box cable-stayed bridge with a beam plate, which solves the problems, the double-side box of the bridge body, a middle connecting top plate and a connecting beam assist in the vertical mold casting by utilizing a support parasitized on a hanging basket base platform, the parasitic support can be disassembled into a split structure, after a section of casting is completed, the parasitic support is disassembled and stacked in a concave space on the base platform and moves forwards together with the hanging basket, so that the parasitic support is not obstructed by the middle beam, the lifting amplitude of the hanging basket is small, the construction is safe, and the traffic navigation under the bridge is not influenced.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a cantilever casting both sides case cable-stay bridge broad body has parasitic support of beam slab to hang basket, includes base platform, preceding fulcrum system and/or back fulcrum system, and preceding fulcrum system and/or back fulcrum system connect the base platform, hangs the base platform in concreten case roof beam front end below, still includes the parasitism between both sides case, hang the abdominal steel pipe support system of basket on the base platform, and the steel pipe support system is buckled the support equipment by dismantled and assembled bowl and is formed. The construction process for the cantilever casting of the hanging basket of the girder of the whole cable-stayed bridge is realized by utilizing a steel pipe support system to cast a beam plate part between side boxes at two sides of the cable-stayed bridge in a cantilever manner, dismantling the support when the hanging basket moves forwards, and reassembling and casting the next part after the hanging basket moves forwards in place.
According to a further improved technical scheme, the base platform is formed by welding a front main cross beam, a rear main cross beam and main longitudinal beams on two sides into a rectangle, I-shaped steel is arranged between the two main longitudinal beams at a distance of 50-60 cm to form a secondary cross beam, the secondary longitudinal beams are welded at a distance of 30-40 cm between the secondary cross beams, and a working panel is laid on the top surfaces of the secondary longitudinal beams.
The utility model further improves the technical scheme that the main cross beam and the main longitudinal beam are made of double-spliced No. 45I-steel, the secondary cross beam is made of single-spliced No. 25I-steel, and the secondary longitudinal beam is made of No. 10 groove welding. And a concave space is formed between the secondary cross beams and above the secondary longitudinal beams, so that the steel pipe support system after being detached can be stacked. The descending height of the hanging basket when moving forward is reduced.
The utility model further improves the technical scheme that two ends of the secondary longitudinal beam are welded on the top surface of the lower flange plate of the I-shaped steel of the secondary cross beam. The sunken space is enlarged as much as possible, and the stacking height of the detached bracket is reduced.
According to the further improved technical scheme, the bottom ends of vertical rods of the steel pipe support system are arranged on a secondary cross beam on a base platform, the distance between the vertical rods is 50-60 cm, horizontal rods are arranged on the vertical rods in a criss-cross mode, the distance between the first horizontal rod and the top surface of the secondary cross beam is 15-25 cm, the distance between the horizontal rods is 60-90 cm, and a jacking support is arranged on the top surface of the vertical rods.
The utility model further improves the technical scheme that the steel pipe support system is assembled by adopting steel pipes with the diameter of 48-50 mm and the wall thickness of 2.5-2.8 mm.
The utility model further improves the technical scheme that the front supporting point system is a C-shaped or L-shaped hook, the top end of the hook is connected to the top surfaces of two sides of the poured concrete box girder, and the bottom end of the hook is connected to the base platform.
According to a further improved technical scheme, the rear supporting point system comprises main beam trusses anchored on two sides of a poured concrete box girder, a front cross beam is arranged above the front end of each main beam truss, a rear cross beam is arranged above the rear end of each main beam truss, and a hanging strip is arranged at the front end of each main beam truss and used for being connected with a base platform.
The utility model has the beneficial effects that:
this hang basket can relapse parasitic steel pipe support system of dismouting at belly construction, accomplishes one section and pours the back, disassembles parasitic support and stacks in the sunk space on base platform, along with hang basket antedisplacement together, can not receive the intermediate transverse beam and hinder, hang basket amplitude of rise little, construction safety, and do not influence the traffic navigation under the bridge.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
As shown in figure 1, the utility model comprises a base platform 1, a front supporting point system 2 and a rear supporting point system 3, wherein the front supporting point system 2 and the rear supporting point system 3 are connected with the base platform 1, the base platform 1 is suspended below the front end of a poured concrete box beam, the utility model also comprises a steel pipe bracket system 4 parasitized between two side boxes 5 and on the belly of a hanging basket on the base platform 1, and the steel pipe bracket system 4 is assembled by detachable bowl-buckled brackets and is used for constructing wide beam slab reinforced concrete parts in the middle of the two side boxes 5.
The method specifically comprises the following implementation steps:
1. and (3) determining that the bridge is a double-side box integral double-tower double-cable-plane cable-stayed bridge, and after constructing the section of the No. 0 block of the pier top T structure, starting to install the cantilever construction hanging basket to prepare for constructing the section of the No. 1 block.
2. The steps of installing the cantilever construction hanging basket are as follows:
(1) and (3) transporting each accessory of the cradle base platform 1 to two sides of the No. 0 block, and then assembling the cradle base platform 1 on the ground or a support. Hang basket base platform 1 this moment mainly includes: the main longitudinal beam, the cross beam, the secondary cross beam, the arc hand, the tail beam and other frame structures. The base platform 1 is formed by welding a front main beam 11 and a rear main beam 11 of double-spliced 25- # I-steel and main longitudinal beams 12 on two sides into a rectangle, and the 25- # I-steel is installed between the two main longitudinal beams 12 at an interval of 50-60 cm to form a secondary beam 13 in a single-spliced mode.
(2) And a rear fulcrum system 3 is arranged on the bridge deck. The system generally comprises a main beam truss, an upper beam, a rear beam, an anchoring system, a fulcrum, a hanging strip and other devices.
(3) Lifting and installing devices such as a cradle base platform, a front support point system 2 (C-shaped or L-shaped hook), a cable guide pipe, a stay cable, a jack, a hanging strip, a sliding beam, an anchoring system and the like.
(4) A hanging basket base platform 1 is further perfected, a No. 10 channel steel secondary longitudinal beam 14 is welded on the top surface of an I-steel lower flange plate between secondary cross beams 13 at an interval of 30-40 cm, a working panel is laid on the top surface of the secondary longitudinal beam 14, a concave space is formed between the secondary cross beams and above the secondary longitudinal beam, and a steel pipe support system 4 after being detached can be stacked.
(5) And (3) installing bottom moulds and outer moulds of the double-sided boxes 5 at two sides.
3. And carrying out test loading, prepressing, unloading and bottom elevation adjustment on the hanging basket.
4. And a roof steel pipe bracket system 4 between the double-sided boxes 5 on the two sides is installed. The steps of setting up the parasitized steel pipe bracket are as follows:
(1) and measuring the position of the vertical rod of the support on the top surface of the secondary beam of the base platform as required.
(2) Installing a steel pipe support: the parasitic steel pipe support is a steel pipe with the diameter of 48-50 mm and the wall thickness of 2.5-2.8 mm, and the support is a bowl buckle support. The distance between the vertical rods is 50-60 cm, the vertical rods are provided with horizontal rods in a criss-cross mode, the distance between the first horizontal rod and the top surface of the secondary cross beam is 15-25 cm, and the distance between the horizontal rods is preferably 60-90 cm.
(3) The top surface of the vertical rod is provided with a top support which adopts a bowl buckle support to support.
5. Adjusting the height of the base platform 1, installing a diaphragm beam bottom die, and installing a top plate bottom die between the double-side boxes on the parasitic steel pipe bracket system.
6. And (5) mounting main beam steel bars and prestressed corrugated pipes.
7. And installing a diaphragm beam side die, a bilateral box end template, an anchorage device and adjusting the bottom elevation.
8. Pouring main beam concrete, tensioning the stay cable to adjust the elevation of the cradle base (half of the poured concrete), maintaining after the poured concrete is finished, dismantling the side die, continuing to maintain, and constructing prestress (including the stay cable).
9. And (3) descending the cradle base platform 1 by 20-40 cm, and removing the top plate bottom die between the double-side boxes.
10. Demolish between the bilateral case of both sides top mould, steel pipe support system, support steel pipe after demolising, fastener, top hold in the palm and equipment material such as template can be put on the work panel that forms the sunk space between the last time crossbeam of base platform 1, time longeron top, stack the height and should not surpass string basket base platform 20cm generally.
11. And (5) installing a hanging basket walking and traction system and moving the hanging basket forwards.
12. And repeating the steps of 4-11 until the midspan girder is closed, and completing the construction of all girders (including the top plates between the double-side boxes).
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.
Claims (8)
1. The utility model provides a cantilever casting bilateral box cable-stay bridge broad body has parasitic support of beam slab to hang basket, includes base platform (1), fore-stock system (2) and/or after-poppet system (3), base platform (1) is connected in fore-stock system (2) and/or after-poppet system (3), hangs base platform (1) in concreting case roof beam front end below, its characterized in that: the basket is characterized by further comprising a steel pipe support system (4) parasitizing between the double-side boxes (5) on the two sides and hanging the belly of the basket on the base platform (1), wherein the steel pipe support system (4) is formed by assembling detachable bowl buckle supports.
2. The cast-in-cantilever double-side box cable-stayed bridge wide-body parasitic support hanging basket with the beam plate according to claim 1, characterized in that: the base platform (1) is formed by mutually welding a front main beam (11), a rear main beam (11) and main longitudinal beams (12) on two sides into a rectangle, installing I-shaped steel between the two main longitudinal beams (12) at an interval of 50-60 cm to form a secondary beam (13), welding a secondary longitudinal beam (14) at an interval of 30-40 cm between the secondary beam (13), and laying a working panel on the top surface of the secondary longitudinal beam (14).
3. The cast-in-cantilever double-side box cable-stayed bridge wide-body parasitic support hanging basket with the beam plate according to claim 2, characterized in that: main beam (11), main longeron (12) adopt double-pin 45I-steel preparation to form, and inferior crossbeam (13) adopt 25I-steel single-pin to form, and inferior longeron (14) adopt 10 groove weldings to form, between the inferior crossbeam, form the sunk space above the inferior longeron, can supply steel pipe support system (4) after dismantling to stack.
4. The cast-in-cantilever double-side box cable-stayed bridge wide-body parasitic support hanging basket with the beam plate according to claim 3, characterized in that: and two ends of the secondary longitudinal beam (14) are welded on the top surface of the I-steel lower flange plate of the secondary cross beam (13).
5. The cast-in-cantilever double-side box cable-stayed bridge wide-body parasitic support hanging basket with the beam plate according to claim 2, characterized in that: the bottom end of the vertical rod of the steel pipe support system (4) is installed on a secondary cross beam on the base platform, the distance between the vertical rods is 50-60 cm, horizontal rods are arranged on the vertical rod in a criss-cross mode, the distance between the first horizontal rod and the top surface of the secondary cross beam is 15-25 cm, the distance between the horizontal rods is 60-90 cm, and the top surface of the vertical rod is provided with a top support.
6. The cast-in-cantilever double-side box cable-stayed bridge wide-body parasitic support hanging basket with the beam plate according to claim 1, characterized in that: the steel pipe support system (4) is assembled by adopting steel pipes with diameters of 48-50 mm and wall thicknesses of 2.5-2.8 mm.
7. The cast-in-cantilever double-side box cable-stayed bridge wide-body parasitic support hanging basket with the beam plate according to claim 1, characterized in that: the front fulcrum system (2) is a C-shaped or L-shaped hook, the top end of the hook is connected to the top surfaces of two sides of the poured concrete box girder, and the bottom end of the hook is connected to the base platform.
8. The cast-in-cantilever double-side box cable-stayed bridge wide-body parasitic support hanging basket with the beam plate according to claim 1, characterized in that: the rear fulcrum system (3) comprises main beam trusses anchored on two sides of the poured concrete box girder, a front cross beam is arranged above the front end of each main beam truss, a rear cross beam is arranged above the rear end of each main beam truss, and a hanging strip is arranged at the front end of each main beam truss and used for being connected with the base platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122279979.9U CN215593730U (en) | 2021-09-22 | 2021-09-22 | Hanging basket for parasitic support with beam plate on wide body of cable-stayed bridge with cantilever pouring double-side box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122279979.9U CN215593730U (en) | 2021-09-22 | 2021-09-22 | Hanging basket for parasitic support with beam plate on wide body of cable-stayed bridge with cantilever pouring double-side box |
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| CN215593730U true CN215593730U (en) | 2022-01-21 |
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| CN202122279979.9U Active CN215593730U (en) | 2021-09-22 | 2021-09-22 | Hanging basket for parasitic support with beam plate on wide body of cable-stayed bridge with cantilever pouring double-side box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808759A (en) * | 2022-05-27 | 2022-07-29 | 中建八局第三建设有限公司 | Cantilever concrete formwork support structure of steel-concrete composite beam bridge and cantilever concrete construction method |
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2021
- 2021-09-22 CN CN202122279979.9U patent/CN215593730U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808759A (en) * | 2022-05-27 | 2022-07-29 | 中建八局第三建设有限公司 | Cantilever concrete formwork support structure of steel-concrete composite beam bridge and cantilever concrete construction method |
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Effective date of registration: 20230418 Address after: No. 10 Jiefang East Road, Qingjiangpu District, Huai'an City, Jiangsu Province, 223000 Patentee after: Jiangsu North Road Engineering Co.,Ltd. Address before: 223002 Jiangsu Beifang road and Bridge Engineering Co., Ltd., No. 10, Jiefang East Road, qingjiangpu District, Huai'an City, Jiangsu Province Patentee before: Zhang Chengrui |