CN209907208U - Wave form steel web continuous beam bridge side span folds cast-in-place supporting structure - Google Patents
Wave form steel web continuous beam bridge side span folds cast-in-place supporting structure Download PDFInfo
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- CN209907208U CN209907208U CN201920145488.5U CN201920145488U CN209907208U CN 209907208 U CN209907208 U CN 209907208U CN 201920145488 U CN201920145488 U CN 201920145488U CN 209907208 U CN209907208 U CN 209907208U
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Abstract
The utility model discloses a wave form steel web continuous beam bridge side span folds cast-in-place supporting structure, mainly include these two parts of cast-in-place support and temporary support to have following characteristics: the two supports are respectively independent systems, and the bearing capacity and the stability of the cast-in-place support cannot be influenced when the temporary support is removed after the plurality of cast-in-place box girders are finished; secondly, the operation of dismantling the temporary support is simple; and thirdly, the elevation of the bottom plate template platform of the closure section is supported or adjusted by effectively utilizing the hanger rod of the bottom template of the corrugated steel web suspended casting cradle and the framework bolts of the stiff skeleton, so that resources are saved. Therefore, the corrugated steel web continuous beam bridge side span closure cast-in-place support structure has the advantages of convenience and high efficiency in operation, safety, reliability, quality guarantee and the like, can avoid collapse accidents when the bottom part length full support and the operation platform at the outermost end of the cast-in-place box girder which are cast in place are dismantled by combining a corresponding construction method, also has the effects of energy conservation and emission reduction, and has remarkable economic and social benefits.
Description
Technical Field
The utility model relates to a wave form steel web continuous beam bridge side span folds construction field, specifically indicates wave form steel web continuous beam bridge side span folds cast-in-place supporting structure.
Background
The side span closure segment construction of the corrugated steel web continuous beam bridge is generally implemented by erecting a full support structure at a bridge abutment and casting a plurality of box girders in situ, and then performing closure segment construction with cantilever box girders extending to adjacent bridge piers in a cantilever casting manner. Because the outermost end of the cast-in-place box girder at the bridge abutment needs to be provided with an operating platform with a certain length, the cantilever box girder extending to the outermost end of the adjacent bridge pier in cantilever casting is formed by cantilever casting of a hanging basket system, and the bottom template of the closure section needs to be supported on a hanging basket bottom plate platform and is connected with the bottom of the box girder at the outermost end of the cast-in-place section, the full-length support and the operating platform at the bottom part of the outermost end of the cast-in-place box girder which is finished in the cast-in-place process need to be removed, and the full-length support collapse accident is easy to.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's defect and provide a convenient operation, safe and reliable, quality guarantee, energy saving and emission reduction's wave form steel web continuous beam bridge side span folds cast-in-place supporting structure.
The technical problem of the utility model is realized through following technical scheme:
a corrugated steel web continuous beam bridge side span closure cast-in-place support structure comprises bridge abutments and full supports erected on solid foundations of adjacent bridge abutments, wherein the full supports are composed of cast-in-place supports and temporary supports; the cast-in-place support is provided with a plurality of cast-in-place box beams of No. (n + 1) to (n + 5), the length of the cast-in-place support is less than the length from the outermost side of the bridge abutment to the most tail end of the cast-in-place box beams by delta =30 cm-50 cm, the cast-in-place support independently bears the load of the cast-in-place box beams, and the cast-in-place box beam at the most tail end is the No. (n + 1) block; the delta =30 cm-50 cm is a closure section, namely an insertion section of the n-number block template platform; the length of the temporary support is delta + L, the total length of the platform of the temporary support is the sum of the length of an insertion section delta =30 cm-50 cm and the length L of the platform of the temporary support, the temporary support and the cast-in-place support are provided with horizontal connecting rod pieces which are firmly connected in the transverse direction, and the stress of the cast-in-place support can not be influenced when the temporary support is disassembled.
The tail end of the (n + 1) block of the cast-in-place box girders of the (n + 1) to (n + 5) blocks is provided with a closure section, namely the n block, and is connected with the cantilever box girder (n-1) block to which the adjacent bridge pier is cast and extended in a cantilever manner, and the top plate and the bottom plate of the (n-1) block and the (n + 1) block are respectively provided with a stiff framework which is fixed by framework bolts; and n number of block template platforms are arranged at the lower ends of the framework bolts of the stiff frameworks on the (n + 1) number of block bottom plates, namely one ends of the closure section bottom plate template platforms, the closure section bottom plate template platform at the other end is supported by the cradle bottom template platform, and the formed closure section bottom plate template platform supports the web plate of the closure section and the template of the top plate.
The cast-in-place box girder consists of a top plate, a bottom plate and a web plate, wherein the top plate and the bottom plate of the (n + 1) number cast-in-place box girder are respectively the (n + 1) number top plate and the (n + 1) number bottom plate; the top plate and the bottom plate of the cast-in-place box girder of the No. (n-1) block are respectively a top plate of the No. (n-1) block and a bottom plate of the No. (n-1) block.
The stiff skeleton is a steel member, is positioned and fixed before constructing a closure section, namely n number of template platforms, reinforcing steel bars and concrete, and is respectively fixed between the (n + 1) number top plate and the (n-1) number top plate and between the (n + 1) number bottom plate and the (n-1) number bottom plate by skeleton bolts.
The hanging basket system is a steel component and consists of a hanging basket support, a hanging basket bottom template platform and two groups of hanging basket bottom template suspenders; the hanging basket support is a traveling mechanism of a hanging basket system, and a moving wheel of the hanging basket system is supported and moves by the top of the corrugated steel web; the bottom of the two groups of hanging basket bottom template hanging rods are hung on the hanging basket bottom template platform.
The n number template platform is a n number template system which is a closure section and bears all loads of the n number cast-in-place box girder.
Compared with the prior art, the utility model mainly designs a wave form steel web continuous beam bridge side span folds cast-in-place supporting structure to have following characteristics: the side span cast-in-place support and the temporary support are two independently formed systems, and the bearing capacity and the stability of the cast-in-place support are not influenced by mutual interference when the temporary support is removed after a plurality of cast-in-place box girders are finished; secondly, the operation of removing the temporary support is simple, and the temporary support can be separated only by removing the horizontal connecting rod piece which is transversely connected and fixed; and thirdly, the elevation of the bottom plate template platform of the closure section is supported or adjusted by effectively utilizing the hanger rods of the bottom templates of the corrugated steel web suspended casting hanging basket and the framework bolts of the stiff frameworks, so that resources are saved, and the operation is convenient and efficient. Therefore, the corrugated steel web continuous beam bridge side span closure cast-in-place support structure has the advantages of convenience and high efficiency in operation, safety, reliability, quality guarantee and the like, can avoid the potential occurrence of collapse accidents of full-length supports and temporary support platforms when the full-length supports at the bottom part of the outmost end of a cast-in-place box beam and the temporary support platforms which are completely cast in place are disassembled by combining a corresponding construction method, also has the effects of energy conservation and emission reduction, and has remarkable economic and social benefits.
Drawings
Fig. 1 is a schematic view of the vertical structure of the present invention.
Fig. 2 is a schematic view of closure segment construction.
FIG. 3 is a diagram of force calculation for a closure profile template system.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings.
As shown in fig. 1 ~ and fig. 3, the bridge pier comprises 1, a number 2 (n-1) block, a number 21 (n-1) block top plate, a number 22 (n-1) block bottom plate, a number 3 (n + 1) block, a number 31 (n + 1) block top plate, a number 32 (n + 1) block bottom plate, a number 4.n block, a cast-in-place support, a temporary support, a number 61 insertion section, a horizontal connecting rod piece, a number 63 temporary support platform, a number 7 stiff framework, a number 71 stiff framework beam, a number 72 framework bolt, a number 8 cradle system, a number 81 cradle support, a number 82 cradle bottom template platform, a number 83 cradle bottom template suspender, and a number 9.n block template platform.
A corrugated steel web continuous beam bridge side span closure cast-in-place support structure is shown in figures 1 and 2 and belongs to the field of corrugated steel web continuous beam bridge side span closure construction.
The cast-in-place support 5 is provided with a plurality of cast-in-place box beams, namely the cast-in-place box beams of (n + 1) to (n + 5) blocks, the length of the cast-in-place box beam is less than the length from the outermost side of the bridge abutment 1 to the tail end of the cast-in-place box beams of (n + 1) to (n + 5) blocks by delta =30 cm-50 cm, the cast-in-place support 5 can independently bear the load of the cast-in-place box beams, the cast-in-place box beam at the tail end is the cast-in-place box beam of (n + 1) block 4, and the delta =30 cm-50 cm is an insertion section 61 of a; the temporary support 6 is an insertion section delta =30 cm-50 cm in length and the total length of the temporary support platform 63 in length L, namely delta + L, the lower part of the part is also a full support and is transversely and firmly connected with the cast-in-place support 5 through a horizontal connecting rod piece 62, and the stress of the cast-in-place support 5 cannot be influenced when the temporary support 6 is dismounted.
After the construction of a plurality of cast-in-place boxes, namely (n + 1) to (n + 5) beams, at the bridge abutment 1 is completed, the temporary support 6, namely delta + L, is dismantled, and at the moment, the length between the cantilever box beam extending to the position adjacent to the bridge pier and the outermost end of the (n + 1) blocks of the plurality of cast-in-place box beams at the bridge abutment 1 is cast in a cantilever manner, namely, the n block 4 is a folding section; the folding section is an n-number block 4, and the n-number block template platform 9 is a template system of the n-number block, namely the folding section, and the template system bears all loads of the n-number block cast-in-place box girder; the cantilever box girder is an (n-1) number block 2, and the top plate and the bottom plate of the (n-1) number block 2 and the (n + 1) number block 3 are respectively provided with a stiff framework 7 and are fixed by framework bolts 72; the lower end of the framework bolt 72 of the upper rigid framework 7 of the (n + 1) number block bottom plate 32 is provided with an n number block template platform 9, namely one end of the folding section bottom plate template platform, the other end of the folding section bottom plate template platform is supported by the hanging basket bottom template platform 82, and the formed folding section bottom plate template platform is used for supporting the templates of the web plate and the top plate of the folding section.
Meanwhile, the cast-in-situ box girder consists of a top plate, a bottom plate and a web plate, wherein the top plate and the bottom plate of the (n + 1) No. 3 cast-in-situ box girder are respectively a (n + 1) No. top plate 31 and a (n + 1) No. bottom plate 32; the top plate and the bottom plate of the cast-in-place box girder of the No. (n-1) block 2 are respectively a No. (n-1) block top plate 21 and a No. (n-1) block bottom plate 22.
The stiff skeleton 7 is a steel member, needs to be positioned and fixed before constructing a closure section, namely n-number template platform 9, a steel bar and concrete, and is respectively fixed between the (n + 1) number top plate 31 and the (n-1) number top plate 21 and between the (n + 1) number bottom plate 32 and the (n-1) number bottom plate 22 by skeleton bolts 72, namely on the (n + 1) number top plate 31 and the (n-1) number top plate 21 of the (n + 1) number 3 and the (n-1) number 3, and the (n + 1) number bottom plate 32 and the (n-1) number bottom plate 22, and forms a stiff skeleton beam 71.
The hanging basket system 8 is a steel component and consists of a hanging basket support 81, a hanging basket bottom template platform 82 and two groups of hanging basket bottom template suspenders 83; the hanging basket support 81 is a traveling mechanism of the hanging basket system 8, and a moving wheel of the hanging basket system 8 is supported and moves by the top of the corrugated steel web; the bottom of the two groups of hanging basket bottom template hanging rods 83 are hung on the hanging basket bottom template platform 82.
The folding section, namely the n-shaped block 4, is of a variable cross-section structure along the longitudinal direction of the bridge, and the load of the n-shaped block cast-in-place box girder at the folding section
Under the action of the action, the lower end C of the framework bolt 72 of the (n + 1) number block bottom plate 32 upper strength framework 7 is provided with an n number block template platform 9, namely one end of the closure section bottom plate template platform is stressed
The other end of the folding section bottom plate template platform is supported by the hanging basket bottom template platform E and is stressedAs shown in fig. 3, the stress on one end of the folding section bottom plate template platform, i.e. the n-number block template platform 9, is calculated by the following formula
、And the structure safety degree:
formula I,
The second formula,
Meanwhile, two groups of cradle bottom template suspenders 83 are required to bear the load of a closure section, namely a cast-in-place box girder of the n-shaped block 4, besides the load of a cradle bottom template platform 82 of the cradle system 8;
the symbols in formula one and formula two are defined as:
the load of the cast-in-situ box girder at the joint of the n-shaped block 4 and the (n-1) -shaped block 2 at the closure section,
；
the distance between the joint of the lower end C of the framework bolt 72 of the rigid framework 7 on the (n + 1) number block bottom plate 32 and the n number block 4 is anchored at one end of the closure section, namely the n number block template platform 9,
；
the length of the closure section, namely the n-shaped block 4 along the axial direction of the bridge,
；
the construction method of the cast-in-situ support structure for the side span closure of the corrugated steel web continuous beam bridge mainly comprises the following steps:
step one, building a cast-in-place support and a temporary support
Tamping foundation, pouring cement concrete surface layer, and bearing the bearing capacity of box girder structure, cast-in-place bracket 5 and temporary bracket 6;
secondly, designing a cast-in-place bracket 5 and a temporary bracket 6 according to relevant standard specifications, wherein the length of the cast-in-place bracket = the length-delta (delta =30 cm-50 cm) of a plurality of cast-in-place box beams, namely the lengths of the numbers (n + 1) to (n + 5), and the length of the temporary bracket 6 = the length L + delta (delta =30 cm-50 cm) of an operating platform;
thirdly, erecting a cast-in-place support 5 and a temporary support 6 which are independent systems respectively, and then transversely and firmly connecting the cast-in-place support 5 and the temporary support 6 by using a horizontal connecting rod piece 62;
fourthly, laying a cast-in-place box girder template;
using concrete block to pre-press cast-in-situ support 5, temporary support 6 and bottom form, the bearing capacity of temporary support 6 must be greater than allowable bearing capacity
And the product is qualified by inspection;
step two, pouring a plurality of cast-in-place box girders
Firstly, mounting box girder steel bars and embedded parts after removing the pre-pressing load, and checking and accepting to be qualified;
secondly, pouring a bottom plate, a web plate and a top plate of the box girder, and maintaining the qualified box girder and then tensioning prestressed steel bars;
removing the temporary support 6;
step three, installing a stiff framework
A stiff framework 7 is respectively arranged between the top plate 32 of the No. (n + 1) block and the top plate 21 of the No. (n-1) block and between the bottom plate 32 of the No. (n + 1) block and the bottom plate 22 of the No. (n-1) block and is fixed by a framework bolt 72;
step four, installing n number module template platform
Firstly, installing n number block template platforms 9, namely one end of a folding section bottom plate template platform, at the lower end C of a framework bolt 72 of a rigid framework 7 on an (n + 1) number block bottom plate 32, wherein the folding section bottom plate template platform at the other end is supported by a hanging basket bottom template platform E;
secondly, the elevation of the n number of template platforms 9 is adjusted by the tension of the lower ends C of the framework bolts 72 of the two groups of hanging basket bottom template suspenders 83 and the (n + 1) number of block bottom plates 32 of the upper stressed framework 7 to meet the design requirement, and the tension of the lower ends C of the framework bolts 72 is smaller than the allowable tension
；
Step five, pouring n number block box girders
Firstly, installing n number block 4 steel bars and embedded parts, and checking and accepting to be qualified;
secondly, selecting proper weather and temperature, pouring concrete and maintaining to be qualified;
and thirdly, removing the n number template platform 9 and continuing to construct next step.
The embodiments of the present invention are only used for illustrating the present invention and are not used for limiting the scope of the present invention. It should also be understood that various changes and modifications of the present invention may be effected by those skilled in the art after reading the teachings herein, and such equivalents are intended to be within the scope of the appended claims.
Claims (6)
1. A corrugated steel web continuous beam bridge side span closure cast-in-situ support structure comprises bridge abutments (1) and full supports erected on solid foundations at adjacent bridge abutments (1), and is characterized in that the full supports are composed of cast-in-situ supports (5) and temporary supports (6); the cast-in-place support (5) is provided with a plurality of cast-in-place box beams of numbers (n + 1) to (n + 5), the length of the cast-in-place support (5) is less than the length from the outermost side of the abutment (1) to the most tail end of the cast-in-place box beams by delta =30 cm-50 cm, the cast-in-place support independently bears the load of the cast-in-place box beams, and the cast-in-place box beam at the most tail end is the number (n + 1) block (4); the delta =30 cm-50 cm is an insertion section (61) of a closure section, namely an n-number block template platform (9); the length of the temporary support (6) is delta + L, the total length is the sum of the length of an insertion section delta =30 cm-50 cm and the length L of a platform (63) of the temporary support, a horizontal connecting rod piece (62) which is firmly connected transversely is arranged between the temporary support (6) and the cast-in-place support (5), and the stress of the cast-in-place support (5) is not influenced when the temporary support (6) is dismantled.
2. The structure of the cast-in-situ support for the edge-span closure of the corrugated steel web continuous beam bridge according to claim 1, wherein the folding section, namely the n-number block, is arranged at the tail end of the n + 1-number block of the cast-in-situ box girders of the n + 1-n + 5-number blocks, the folding section is connected with the n-number block of the cantilever box girder (n-1) to which the adjacent bridge pier extends in a cantilever casting manner, and stiff frameworks (7) are respectively arranged on the top plate and the bottom plate of the n-1-number block (2) and the n + 1-number block (3) and are fixed by framework bolts (72); and n number of block template platforms (9) are arranged at the lower ends of the framework bolts (72) of the upper stressed frameworks (7) of the (n + 1) number of block bottom plates (32), namely one ends of the folding section bottom plate template platforms, the folding section bottom plate template platform at the other end is supported by the cradle bottom template platform (82), and the formed folding section bottom plate template platform supports the webs and the templates of the top plate of the folding section.
3. The cast-in-place support structure for the edge-span closure of the corrugated steel web continuous beam bridge according to claim 2, wherein the cast-in-place box girder consists of a top plate, a bottom plate and a web, and the top plate and the bottom plate of the (n + 1) number block (3) cast-in-place box girder are respectively a (n + 1) number block top plate (31) and a (n + 1) number block bottom plate (32); the top plate and the bottom plate of the cast-in-place box beam of the No. (n-1) block (2) are respectively a No. (n-1) block top plate (21) and a No. (n-1) block bottom plate (22).
4. The cast-in-situ support structure for the edge-span closure of the corrugated steel web continuous beam bridge according to claim 2, wherein the stiff frameworks (7) are steel members, are positioned and fixed before constructing a closure section, namely n number template platforms (9), steel bars and concrete, and are respectively fixed between the (n + 1) number top plate (31) and the (n-1) number top plate (21) and between the (n + 1) number bottom plate (32) and the (n-1) number bottom plate (22) by framework bolts (72).
5. The cast-in-situ support structure for the edge-span closure of the corrugated steel web continuous beam bridge according to claim 2, wherein the cradle system (8) is a steel component and consists of a cradle support (81), a cradle bottom formwork platform (82) and two sets of cradle bottom formwork hanger rods (83); the hanging basket support (81) is a travelling mechanism of the hanging basket system (8), and a moving wheel of the hanging basket system (8) is supported and moves by the top of the corrugated steel web; the bottoms of the two groups of hanging basket bottom template hanging rods (83) are hung on the hanging basket bottom template platform (82).
6. The structure of the cast-in-situ support for the edge-span closure of the corrugated steel web continuous beam bridge according to claim 2 is characterized in that the n number template platforms (9) are n number blocks (4), namely template systems of closure sections, and the template systems bear the whole load of the n number blocks (4) of cast-in-situ box beams.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736206A (en) * | 2019-01-28 | 2019-05-10 | 宁波交通工程建设集团有限公司 | Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method |
| CN114214968A (en) * | 2021-12-15 | 2022-03-22 | 中建七局安装工程有限公司 | Bridge No. 0 block bottom plate dismantling-free construction method |
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2019
- 2019-01-28 CN CN201920145488.5U patent/CN209907208U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736206A (en) * | 2019-01-28 | 2019-05-10 | 宁波交通工程建设集团有限公司 | Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method |
| CN109736206B (en) * | 2019-01-28 | 2023-11-28 | 宁波交通工程建设集团有限公司 | Cast-in-situ bracket structure for bridge side span closure of corrugated steel web continuous beam and construction method |
| CN114214968A (en) * | 2021-12-15 | 2022-03-22 | 中建七局安装工程有限公司 | Bridge No. 0 block bottom plate dismantling-free construction method |
| CN114214968B (en) * | 2021-12-15 | 2023-05-12 | 中建七局安装工程有限公司 | Bridge No. 0 block bottom plate dismantling-free construction method |
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