CN112813847A - Cast-in-place box girder edge protection structure and construction method - Google Patents
Cast-in-place box girder edge protection structure and construction method Download PDFInfo
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- CN112813847A CN112813847A CN202110181568.8A CN202110181568A CN112813847A CN 112813847 A CN112813847 A CN 112813847A CN 202110181568 A CN202110181568 A CN 202110181568A CN 112813847 A CN112813847 A CN 112813847A
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- cantilever
- cast
- square timber
- template
- box girder
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The application discloses cast-in-place case roof beam faces limit protective structure and construction method, including spandrel girder, cantilever template, the cantilever template is located the both sides of spandrel girder, the cantilever template with be equipped with several vertical support pole and diagonal bracing pole between the spandrel girder, be equipped with guardrail structure on the cantilever template, guardrail structure include with cantilever template be connected the edge of a wing template set up a plurality of railings on the edge of a wing template, every interval several railing is equipped with a connection square timber. The cantilever structure support is fully utilized to serve as a bearing structure of the guardrail, and is combined with the construction of the cast-in-place box girder, and the guardrail protection structure is combined with the whole construction of the cast-in-place box girder to be integrated. The guardrail structure is supported by using the cantilever only on the top surface of the cast-in-situ box girder. The guardrail receives to offset each other through self structure after assaulting, does not have the influence of horizontal force to lower part support, and the security is better.
Description
Technical Field
The application relates to the technical field of bridges, in particular to a cast-in-place box girder edge protection structure.
Background
The cast-in-place box girder is a common design form of the existing bridge construction, and because the cast-in-place box girder has the characteristics of high-altitude operation, complex structural form, small bending and diameter changing and the like, the high-altitude operation has the danger of following the height, and safety protection needs to be done near the edge. Conventional support protection railing sets up the one deck independent support in the full hall support outside, connects the protective bracket as cast-in-place roof beam after high, and single row protective bracket passes through horizontal member and the full hall leg joint of main part, and the shortcoming of this kind of way is: (1) the material consumption of the support for protection which is arranged separately is increased along with the increase of the design height of the beam body, and the economy is poor. (2) The guardrail receives the impact force at upper portion, transmits the power of a horizontal direction of full hall support, causes the incident easily.
Disclosure of Invention
The application mainly aims to provide the cast-in-place box girder edge protection structure and the construction method, which are convenient to install, trouble-saving and material-saving and can ensure the construction safety of operators at high positions of the cast-in-place box girder.
The main aim at of this application provides a cast-in-place case roof beam faces limit protective structure, including spandrel girder, cantilever template is located the both sides of spandrel girder, cantilever template with be equipped with several vertical support pole and diagonal bracing pole between the spandrel girder, be equipped with guardrail structure on the cantilever template, guardrail structure include with cantilever template be connected the edge of a wing template set up a plurality of railings on the edge of a wing template, every interval several railing is equipped with a connection square timber.
Preferably, the cantilever formwork is provided with an elongated end, and the length of the elongated end is 45-55 mm.
Preferably, a supporting square timber is arranged between the handrail and the extension end of the cantilever formwork, and the supporting square timber, the handrail and the extension end form a triangular shape.
Preferably, the rail, the supporting square timber and the extension end are connected through a shooting nail.
Preferably, the cantilever template is in the shape of an inverted "L".
Preferably, the inclined angle of the inclined support bar is 30-60 °.
Preferably, a reinforcing plate is arranged at the joint of the oblique supporting rod and the bearing beam.
Preferably, the dimensions of the balustrade are 1.5m long and 1.2m wide.
Preferably, a transverse connecting rod is arranged between the vertical supporting rods.
Preferably, the connecting square timber and the rail are connected through a rail buckle.
Preferably, the top of the flange templates on the two sides are provided with split steel wire ropes.
The application also provides a construction method of the cast-in-place box girder edge protection structure, which comprises the following steps:
s1, mounting the cantilever template and the flange template, wherein the support square timber needs to extend out 40-60cm to the extension end of the cantilever template so as to provide space for supporting the square timber at the later stage, and the height of the cantilever template is consistent with the thickness of the flange plate;
s2, arranging and tightly attaching connecting square timber outside the handrail buckle, and intentionally adjusting the linear shape in the installation process to form a curve shape, so that the handrail buckle is as beautiful as possible on the basis of meeting the design requirements;
s3, arranging a supporting square timber at the position where the protective railing is connected with the square timber to enable the supporting square timber to be connected with the bearing square timber of the cantilever template, enabling the supporting square timber and the supporting square timber to form a triangular stable system, and enabling the connecting square timber and the supporting square timber to be tightly connected through a shooting nail;
and S4, arranging opposite-pulling steel wire ropes on the tops of flange templates on two sides of the box girder, wherein the elevation of each steel wire rope is equal to that of the girder top, and adjusting the steel wire ropes according to the cross slope. Set up wire rope at every certain distance, wire rope's effect has two: firstly, guarantee the stability of both sides guardrail, secondly as the reference surface that the bridge floor was pour, use wire rope as the benchmark control top surface elevation.
Preferably, in step S1, the supporting square timber needs to extend 50cm towards the extension end of the cantilever formwork, and in step S2, the dimension of the handrail is 1.2m × 1.5 m.
The beneficial effect of this application is: the cantilever formwork support is fully utilized to serve as a bearing structure of the guardrail, the cantilever formwork support is combined with the construction of a cast-in-place box girder, and the guardrail structure and the whole construction of the cast-in-place box girder are combined and integrated. The cantilever formwork is only used for supporting the protective structure system on the top surface of the cast-in-place box girder, and the method is simple, applicable, convenient and good in economical efficiency. The guardrail receives to offset each other through self structure after assaulting, does not have the influence of horizontal force to lower part support, and the security is better.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic view of the overall structure of a protective structure;
FIG. 2 is a front view of the guardrail structure;
figure 3 is a side view of the guardrail structure.
1-a spandrel girder; 2-oblique supporting rod; 3-oblique supporting rod; 4-vertical supporting rod; 5, cantilever template; 6, supporting square timber; 7, a guardrail structure; 9-lower support; 10-transverse connecting rod; 11-transverse bar; 12-a reinforcing plate; 13-counter-pulling the wire rope; 71-connecting square wood; 72-a rail; 73, rail buckling; 74-flange form; 75-shooting nail.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, 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, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
Please refer to fig. 1-3, the application provides a cast-in-place box girder limb protection structure, including spandrel girder 1, cantilever template 5 is located spandrel girder 1's both sides, cantilever template 5 with be equipped with several vertical support rod 4 and diagonal bracing pole 2 between spandrel girder 1, be equipped with guardrail structure 7 on the cantilever template 5, guardrail structure 7 includes the flange template 74 of being connected with cantilever template 5, set up a plurality of railing 72 on the flange template 74, every interval several railing 72 is equipped with a connection square timber 71. The lower end of the bearing beam 1 is provided with a lower bracket 9, and the lower bracket 9 is connected through a transverse connecting rod 10.
In this embodiment, the cantilever formwork 5 is provided with an elongated end having a length of 45-55 mm.
In this embodiment, a supporting square timber 6 is arranged between the rail 72 and the extending end of the cantilever formwork 5, and the supporting square timber 6, the rail 72 and the extending end form a triangular shape.
In this embodiment, the balustrade 72, the supporting square timber 6 and the elongate end are connected by a nail.
In this embodiment, the cantilever formwork 5 has an inverted "L" shape.
In this embodiment, the inclined angles of the inclined support rods 2 and 3 are 30-60 °.
In this embodiment, a reinforcing plate 12 is disposed at the joint of the diagonal support rods 2 and 3 and the bearing beam 1.
In this embodiment, the rail 72 has a length of 1.5m and a width of 1.2 m.
In this embodiment, a transverse connecting rod 11 is arranged between the vertical supporting rods 4.
In this embodiment, the connecting square timber 71 and the rail 72 are connected by a rail buckle 73.
In this embodiment, the top of the two side flange forms 74 is provided with the split steel cables 13.
The application also provides a construction method of the cast-in-place box girder edge protection structure, which comprises the following steps:
s1, mounting the cantilever template and the flange template, wherein the support square timber needs to extend out 40-60cm to the extension end of the cantilever template so as to provide space for supporting the square timber at the later stage, and the height of the cantilever template is consistent with the thickness of the flange plate;
s2, arranging and tightly attaching connecting square timber outside the handrail buckle, and intentionally adjusting the linear shape in the installation process to form a curve shape, so that the handrail buckle is as beautiful as possible on the basis of meeting the design requirements;
s3, arranging a supporting square timber at the position where the protective railing is connected with the square timber to enable the supporting square timber to be connected with the bearing square timber of the cantilever template, enabling the supporting square timber and the supporting square timber to form a triangular stable system, and enabling the connecting square timber and the supporting square timber to be tightly connected through a shooting nail;
and S4, arranging opposite-pulling steel wire ropes on the tops of flange templates on two sides of the box girder, wherein the elevation of each steel wire rope is equal to that of the girder top, and adjusting the steel wire ropes according to the cross slope. Set up wire rope at every certain distance, wire rope's effect has two: firstly, guarantee the stability of both sides guardrail, secondly as the reference surface that the bridge floor was pour, use wire rope as the benchmark control top surface elevation.
In this embodiment, in step S1, the supporting square timber needs to extend 50cm to the extension end of the cantilever form, and in step S2, the dimension of the balustrade is 1.2m × 1.5 m.
This application faces the limit protection through at cast-in-place case roof beam and sets up simple and easy railing, through forming a whole with cantilever template, guardrail structure to as the auxiliary measure, on guaranteeing construction safety and basis, guarantee that the linear mesh pleasing to the eye, improve the installation effectiveness to the wire rope that draws.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a cast-in-place case roof beam faces limit protective structure, a serial communication port, including spandrel girder, cantilever template is located the both sides of spandrel girder, cantilever template with be equipped with several vertical support pole and diagonal bracing pole between the spandrel girder, be equipped with guardrail structure in the cantilever template, guardrail structure include with cantilever template connected the edge of a wing template set up a plurality of railings on the edge of a wing template, every interval several railing is equipped with a connection square timber.
2. A cast-in-place box beam edge protection structure as claimed in claim 1, wherein the cantilever formwork is provided with an extension end, and the length of the extension end is 45-55 mm.
3. The cast-in-place box girder edge-facing protection structure as claimed in claim 1, wherein a supporting square timber is arranged between the handrail and the extension end of the cantilever formwork, and the supporting square timber, the handrail and the extension end form a triangular shape.
4. A cast-in-place box girder edge-facing protective structure as claimed in claim 3, wherein the balustrade, the supporting square timber and the extension end are connected by a nail.
5. The cast-in-place box beam edge-protecting structure as claimed in claim 1, wherein said cantilever formwork is in the shape of an inverted "L".
6. The cast-in-place box girder edge-facing protective structure as claimed in claim 1, wherein the inclined angle of the inclined support bar is 30-60 °.
7. The cast-in-place box girder edge-facing protection structure as claimed in claim 6, wherein a reinforcing plate is provided at the junction of the diagonal support bar and the bearing beam, and a transverse connecting bar is provided between the vertical support bars.
8. The cast-in-place box girder edge-facing protective structure as claimed in claim 1, wherein the connecting square timber and the rail are connected by rail buckles, and the top of the flange formworks on both sides are provided with split steel wire ropes.
9. A construction method of a cast-in-place box girder edge protection structure is characterized by comprising the following steps:
s1, mounting the cantilever template and the flange template, wherein the support square timber needs to extend out 40-60cm to the extension end of the cantilever template so as to provide space for supporting the square timber at the later stage, and the height of the cantilever template is consistent with the thickness of the flange plate;
s2, arranging and tightly adhering connecting square timber outside the handrail buckle, and adjusting the line shape in the installation process to form a curve;
s3, arranging a supporting square timber at the position where the protective railing is connected with the square timber to enable the supporting square timber to be connected with the bearing square timber of the cantilever template, enabling the supporting square timber and the supporting square timber to form a triangular stable system, and enabling the connecting square timber and the supporting square timber to be tightly connected through a shooting nail;
and S4, arranging opposite-pulling steel wire ropes on the tops of flange templates on two sides of the box girder, wherein the elevation of each steel wire rope is equal to that of the girder top, adjusting the steel wire ropes according to the cross slope, and arranging the steel wire ropes at certain intervals.
10. The construction method of a cast-in-place box girder edge-protecting structure as claimed in claim 9, wherein the supporting square lumber is extended 50cm toward the extension end of the cantilever form in step S1, and the balustrade has a size of 1.2m by 1.5m in step S2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110181568.8A CN112813847A (en) | 2021-02-09 | 2021-02-09 | Cast-in-place box girder edge protection structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110181568.8A CN112813847A (en) | 2021-02-09 | 2021-02-09 | Cast-in-place box girder edge protection structure and construction method |
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| Publication Number | Publication Date |
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| CN112813847A true CN112813847A (en) | 2021-05-18 |
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| CN202110181568.8A Pending CN112813847A (en) | 2021-02-09 | 2021-02-09 | Cast-in-place box girder edge protection structure and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774802A (en) * | 2021-09-17 | 2021-12-10 | 黑龙江省龙建路桥第五工程有限公司 | Cast-in-place box girder edge protection structure and construction method |
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2021
- 2021-02-09 CN CN202110181568.8A patent/CN112813847A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774802A (en) * | 2021-09-17 | 2021-12-10 | 黑龙江省龙建路桥第五工程有限公司 | Cast-in-place box girder edge protection structure and construction method |
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