CN108560417B - Quick construction method and positioning jig frame for guardrail - Google Patents
Quick construction method and positioning jig frame for guardrail Download PDFInfo
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- CN108560417B CN108560417B CN201810506965.6A CN201810506965A CN108560417B CN 108560417 B CN108560417 B CN 108560417B CN 201810506965 A CN201810506965 A CN 201810506965A CN 108560417 B CN108560417 B CN 108560417B
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- guardrail
- positioning
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- 238000010276 construction Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 70
- 239000010959 steel Substances 0.000 claims abstract description 70
- 238000009434 installation Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 13
- 230000002787 reinforcement Effects 0.000 description 11
- 238000005520 cutting process Methods 0.000 description 8
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/103—Parapets, railings ; Guard barriers or road-bridges
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention provides a positioning jig for guard bar embedded bars, which comprises a longitudinal base, one or more groups of horizontal limiting parts which are arranged on the base and extend along the longitudinal bridge direction, and vertical limiting parts which are arranged on at least one side of each group of horizontal limiting parts; the longitudinal axis of the base is parallel to the longitudinal bridge direction; wherein the horizontal limiting part comprises a positioning steel bar; the vertical limiting part is fixed on the base, and a plurality of limiting grooves are formed in one side, facing the horizontal limiting part, of the vertical limiting part. The invention also provides a construction method of the guardrail, which adopts the positioning jig frame of the guardrail embedded bars. The positioning jig improves the linearity of the embedded bars, so that the construction of the guardrail is not easily affected by the environment. The guardrail construction method provided by the invention enables the installation of the embedded bars and the installation of the beam slab bars to be carried out simultaneously, and adjusts the line production to parallel operation, thereby improving the construction efficiency.
Description
[ field of technology ]
The invention relates to the technical field of bridge cast-in-situ guardrail construction, in particular to a quick construction method and a positioning jig frame of a guardrail.
[ background Art ]
In the traditional bridge cast-in-situ guardrail construction process, the distance and the line shape of the embedded bars are controlled by a stay wire control method at all times in the embedded construction.
However, the wire pulling control method has the following disadvantages: firstly, the pulled wire is easily affected by wind, and construction is difficult to carry out when the wind power is excessive; secondly, the top plate steel bars are trampled or other embedded steel bars touch the wire running position which is pulled, and then the embedded line shape and the space have larger deviation. Therefore, the stay wire control method can lead to the situation that the steel bars cannot be installed in place during the subsequent guardrail construction, the guardrail protection layer is affected, the cracking phenomenon is also caused, and the service life of the guardrail is affected. In addition, the traditional construction of the embedded bars needs to be installed after the beam slab bars are installed, so that the construction period is greatly prolonged.
Therefore, it is necessary to provide a positioning jig for improving the alignment of guard rail embedded bars, and a guard rail construction method for improving the construction efficiency.
[ invention ]
The invention aims to provide a positioning jig frame for improving the linearity of embedded bars of a guardrail.
In order to achieve the purpose, the invention adopts the following technical scheme:
the positioning jig frame for the guardrail embedded bars comprises a longitudinal base, one or more groups of horizontal limiting parts which are arranged on the base and extend along the longitudinal bridge direction, and vertical limiting parts which are arranged on at least one side of each group of horizontal limiting parts; the longitudinal axis of the base is parallel to the longitudinal bridge direction;
wherein the horizontal limiting part comprises a positioning steel bar; the vertical limiting part is fixed on the base, and a plurality of limiting grooves are formed in one side, facing the horizontal limiting part, of the vertical limiting part.
Preferably, the positioning jig is provided with two groups of horizontal limiting parts, and the vertical limiting parts are arranged on two sides of a transverse bridge of the positioning jig and are arranged in parallel along the longitudinal axis of the base.
Preferably, the horizontal limiting part further comprises a support pad arranged at the bottom of the positioning steel bar.
Preferably, positioning plates are arranged on two sides of the longitudinal axis of the positioning jig frame, and two ends of the vertical limiting part are fixed on the positioning plates in a detachable connection mode.
Preferably, the vertical limiting portion comprises a channel steel which is laterally erected, and the opening direction of the channel steel is opposite to the horizontal limiting portion.
Preferably, the limit groove is a notch matched with the outline of the embedded bar.
Preferably, a handle is arranged at the top of the vertical limiting part.
Preferably, the upper end face of the base is provided with a carrying bracket.
Preferably, the bottom of the base is provided with a supporting leg.
Another object of the present invention is to provide a guardrail construction method that improves construction efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the construction method of the guardrail comprises the embedded bars and the rear connecting bars, wherein the positioning jig frame of the embedded bars of the guardrail is adopted, and the construction method of the guardrail comprises the following steps:
setting up the positioning jig frame;
installing the embedded bars according to the preset positions of the horizontal limiting part and the vertical limiting part, and connecting the embedded bars with the positioning bars of the positioning jig frame into a whole to form an embedded framework;
carrying the pre-buried framework from the positioning jig frame to a designated mounting position;
and installing the rear connecting steel bars at the connecting position of the embedded framework so as to finish the construction of the guardrail.
Preferably, the embedded bars comprise first embedded bars close to one side of the longitudinal axis and second embedded bars arranged beside the first embedded bars and far away from one side of the longitudinal axis.
Preferably, the step of installing the embedded bars according to the preset positions of the horizontal limiting part and the vertical limiting part and connecting the embedded bars with the positioning bars of the positioning jig frame into a whole to form an embedded framework specifically comprises the following steps:
the first embedded bars/the second embedded bars are arranged on the vertical limiting parts through limiting grooves, and the bottoms of the first embedded bars/the second embedded bars are fixedly connected with positioning bars of the positioning jig frame.
Preferably, before the pre-buried skeleton is transported from the positioning jig frame to the designated installation position, the method further comprises:
and respectively withdrawing all the vertical limiting parts from the positioning jig frame.
Preferably, before the pre-buried skeleton is transported from the positioning jig frame to the designated installation position, the method further comprises:
and installing beam slab steel bars at the installation positions.
Compared with the prior art, the invention has the following advantages:
1. according to the positioning jig frame, the horizontal limiting part and the vertical limiting part with the limiting groove are arranged, meanwhile, the positioning steel bars are arranged at the horizontal limiting part, and the embedded part and the positioning steel bars are connected into a whole to form the steel bar framework which is simple in structure and convenient to install and detach, so that the embedded steel bars can be temporarily fixed, the linearity of the embedded steel bars is improved, and the guardrail construction is not easily affected by the environment.
2. The positioning steel bars in the positioning jig frame can be used as the longitudinal steel bars of the box girder top plate besides the bottoms of the embedded steel bars, and can effectively prevent the embedded steel bars from moving due to the fact that the top plate steel bars are trampled.
3. The positioning jig frame can be provided with a plurality of groups of horizontal limiting parts and vertical limiting parts, so that the installation of a plurality of groups of embedded bars of the guardrail can be realized simultaneously.
4. The guardrail construction method adopts the construction method that the embedded bars are manufactured into the embedded framework and then are installed, and the construction of the embedded bars is not required to be carried out after the installation of the beam slab bars is completed, so that the installation of the embedded bars and the installation of the beam slab bars can be carried out simultaneously, the line production is adjusted to be parallel operation, and the construction efficiency is greatly improved.
[ description of the drawings ]
FIG. 1 is a schematic view of a positioning jig for guard rail embedded bars according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic view of another embodiment of a positioning jig for guard rail embedded bars according to the present invention;
FIG. 3 is a schematic view of another embodiment of a positioning jig for guard rail embedded bars of the present invention;
FIG. 4 is a schematic view of another embodiment of a positioning jig for guard rail embedded bars of the present invention;
fig. 5 is a schematic diagram of the composition structure of the guardrail in the construction method of the guardrail of the present invention.
[ detailed description ] of the invention
The invention is further described below with reference to the drawings and exemplary embodiments, wherein like reference numerals refer to like parts throughout. Further, if detailed description of the known art is not necessary to illustrate the features of the present invention, it will be omitted.
Example 1
Referring to fig. 1, a positioning jig 1 for guard bar embedded bars comprises a longitudinal base 10, two groups of horizontal limiting parts 11 which are arranged on the base 10 and extend along a longitudinal bridge direction, and two groups of vertical limiting parts 12 which are correspondingly arranged on the side edges of each group of horizontal limiting parts 11. Wherein, after the positioning jig 1 is installed, the longitudinal axis of the base 10 is parallel to the longitudinal bridge direction. Specifically, the vertical limiting parts 12 are arranged on two sides of the transverse bridge of the positioning jig frame 1 and are arranged in parallel along the longitudinal axis of the base 10, and the length of the base 10 and the length of the vertical limiting parts 12 can be adjusted according to the length of the embedded framework which is required to be installed. The vertical limiting parts 12 are arranged on two sides of the transverse bridge direction of the positioning jig frame 1 so as to facilitate the disassembly and transportation of the pre-buried framework.
The horizontal limiting portion 11 comprises two positioning steel bars 111 which are arranged at intervals, and two ends of each positioning steel bar 111 are arranged on the base 10. The vertical limiting portion 12 includes a channel steel 121 fixed on the base 10 in a standing manner, an opening direction of the channel steel 121 faces away from the horizontal limiting portion 11, and a plurality of limiting grooves (not shown) are formed in a side of the vertical limiting portion 12 facing the horizontal limiting portion 11. Preferably, the limiting grooves are notches matched with the outline of the embedded steel bar 2, limiting grooves are arranged on the channel steel 121 according to a certain longitudinal bridge spacing, and the spacing of the limiting grooves of the two groups of vertical limiting parts 12 is equal, so that the corresponding relation between the two groups of embedded steel bars 2 is controlled, and a foundation is provided for accurate installation of the subsequent embedded steel bars 2. In addition, the embedded bars 2 are limited by arranging the limiting grooves on the channel steel 121, so that the embedded bars 2 are positioned more stably and are not easily affected by weather.
The base 10 includes a plurality of short channel steels (not shown) arranged along the transverse bridge direction, and a plurality of short channel steels form a fixed frame together with the horizontal limiting part 11 by being fixed at the bottom of the horizontal limiting part 11. The upper end face of the base 10 is also provided with a carrying bracket 14, and the carrying bracket 14 is a frame-type bracket formed by erecting a plurality of upright and transversely arranged round steels. The carrying bracket 14 is arranged in the middle of the positioning jig frame 1 and provides an impetus for the whole carrying of the positioning jig frame 1. The bottom of the base 10 is provided with the supporting legs 101 so as to adjust the height of the positioning jig frame 1 to a height suitable for construction, thereby improving the construction efficiency.
The horizontal limiting part 11 is connected with the base 10, and the vertical limiting part 12 is connected with the base 10 in a welding mode. The vertical limiting part 12 and the base 10 can be connected in a bolting or hinging mode, the two connecting modes are convenient to mount and dismount, cutting and welding are not needed after the positioning jig frame 1 is used, the positioning jig frame 1 is not damaged, and the subsequent recycling of the positioning jig frame 1 is also convenient. After the installation of the embedded steel bars 2 is completed, the vertical limiting parts 12 and the base 10 are sequentially subjected to cutting welding or disassembling, the horizontal limiting parts 11 and the base 10 are subjected to cutting welding, the vertical limiting parts 12 are removed from the positioning jig frame 1, and the embedded framework formed by the embedded steel bars 2 and the positioning steel bars 111 is conveyed to a specified installation position. The positioning steel bars 111 can be used for fixing the bottom of the embedded steel bars 2, can be used as longitudinal steel bars of a box girder top plate after being installed at the guardrail, and can effectively prevent the embedded steel bars 2 from being shifted due to the fact that the top plate steel bars are trampled.
The erection step of the positioning jig frame 1 comprises the following steps: a plurality of short channel steels with equal length are aligned along the longitudinal bridge direction to form a base 10, wherein the openings of the short channel steels are downward; two groups of positioning steel bars 111 are sequentially erected on the short channel steel, and are welded and fixed after the positions are adjusted to form a temporary jig consisting of a horizontal limiting part 11 and a base 10; inverting the temporary jig frame and welding more than two groups of supporting legs 101 at the bottom of the base 10; a plurality of round steels which are vertically and transversely arranged are adopted to erect a carrying bracket 14 on the end face of the base 10 along the longitudinal bridge direction; finally, the installation position of the vertical limiting part 12 is adjusted, and the positioning jig frame 1 is formed after the vertical limiting part 12 is connected with the base 10.
The positioning jig frame 1 is made of the existing construction site materials, rigidity meets construction requirements, and a plurality of groups of horizontal limiting parts 11 and vertical limiting parts 12 can be arranged at the same time according to actual conditions, so that the installation of a plurality of groups of embedded bars 2 of the guardrail can be realized at the same time.
According to the positioning jig frame 1, the horizontal limiting part 11 and the vertical limiting part 12 with the limiting groove are arranged, meanwhile, the positioning steel bar 111 is arranged on the horizontal limiting part 11, and the embedded steel bar 2 and the positioning steel bar 111 are connected into a whole to form the steel bar framework which is simple in structure and convenient to install and detach, so that the embedded steel bar 2 can be temporarily fixed, the linearity of the embedded steel bar 2 is improved, and the guardrail construction is not easily affected by weather. According to the field implementation effect of the positioning jig frame 1, the embedded bar line shape is optimized, and the construction period can be saved by half a day for each 50m box girder.
Example 2
Referring to fig. 2, compared with embodiment 1, the positioning jig 1 of the guard rail embedded reinforcement in embodiment 2 is different in that the horizontal limiting portion 11 includes a positioning reinforcement 111 and a support pad 112 disposed at the bottom of the positioning reinforcement 111. The support pad 112 is a channel steel, and the opening of the channel steel faces downwards. The channel-section steel has increased the area of contact between embedded bar 2 and the spacing portion 11 of level as the part of spacing portion 11 of level, and embedded bar 2 except fixed with spacer bar 111, can also weld on backing 112, so, can consolidate the connection between embedded bar 2 and the spacing portion 11 of level greatly, realizes firm location.
In addition, a handle 122 is further arranged at the top of the vertical limiting portion 12, and the handle 122 is a frame formed by erecting a plurality of round steels. By holding the handle 122, the vertical limiting part 12 is convenient to be quickly removed from the positioning jig 1 after cutting and welding, and the vertical limiting part 12 can be carried after heat generated by the vertical limiting part 12 is not required to be dissipated in the cutting and welding process.
Example 3
Referring to fig. 3, compared with embodiment 2, the positioning jig 1 of the guard rail embedded reinforcement in embodiment 3 is different in that positioning plates 13 are fixedly disposed on two sides of a longitudinal axis of the positioning jig 1, and two ends of the vertical limiting portion 12 are fixed on the positioning plates 13 in a detachable connection manner. Specifically, the locating plate 13 is rectangular steel plate, and the two ends of the vertical limiting part 12 are fixed on the locating plate 13 through welding, so that the locating plate 13 is fixed on the locating jig frame 1, and the locating plate 13 is used as a contact site between the vertical limiting part 12 and the locating jig frame 1, so that compared with the mode that the vertical limiting part 12 is directly welded on the base 10, the welding is more convenient and saves more materials, and the cutting and welding are also facilitated through welding between the vertical limiting part 12 and the locating plate 13.
Example 4
Referring to fig. 4, the positioning jig 1 can be flexibly adjusted according to the number of the embedded bars of the guardrail, and compared with the embodiment 1, the positioning jig 1 of the embedded bars of the guardrail in the embodiment 4 is different in that the positioning jig 1 comprises a group of horizontal limiting portions 11 arranged on the base 10 and extending along the longitudinal bridge direction, and vertical limiting portions 12 arranged at the sides of the horizontal limiting portions 11.
Example 5
1-5, the guardrail comprises embedded bars 2 and rear connection bars 3, the positioning jig frame 1 of the guardrail embedded bars is adopted, and the construction method of the guardrail comprises the following steps:
setting up the positioning jig frame 1;
installing the embedded steel bars 2 according to the preset positions of the horizontal limiting parts 11 and the vertical limiting parts 12, and connecting the embedded steel bars with the positioning steel bars 111 of the positioning jig frame 1 into a whole to form an embedded framework;
carrying the pre-buried framework from the positioning jig frame 1 to a designated mounting position;
and installing the rear connecting steel bars 3 at the connecting position of the embedded framework so as to finish the construction of the guardrail.
The embedded bars 2 comprise first embedded bars 21 close to one side of the longitudinal axis and second embedded bars 22 which are arranged beside the first embedded bars 21 and far away from one side of the longitudinal axis.
Installing the embedded steel bars 2 according to the preset positions of the horizontal limiting parts 11 and the vertical limiting parts 12, and connecting the embedded steel bars with the positioning steel bars 111 of the positioning jig frame 1 into a whole, wherein the step of forming the embedded framework specifically comprises the following steps: the first embedded bars 21 and the second embedded bars 22 are sequentially installed on the vertical limiting part 12 through limiting grooves, and the bottoms of the first embedded bars 21 and the second embedded bars 22 are welded on the positioning bars 111 of the positioning jig frame 1.
Preferably, before the pre-buried skeleton is carried from the positioning jig frame 1 to the designated installation position, the method further comprises: and cutting and welding are carried out between the vertical limiting part 12 and the base 10, and the vertical limiting part 12 is removed from the positioning jig 1. Then cutting and welding are carried out between the horizontal limiting part 11 and the base 10, and the pre-buried framework is moved away from the positioning jig frame 1 and is placed in a storage area.
Preferably, before the pre-buried skeleton is carried from the positioning jig frame 1 to the designated installation position, the method further comprises: the beam slab rebar 4 is installed at the installation location.
The beam slab reinforcement 4 is used for fixing two reinforcement bars positioned on the same horizontal plane in the transverse bridge direction, specifically, the beam slab reinforcement 4 is used as a reference, and the first embedded reinforcement 21 and the second embedded reinforcement 22 belonging to the same horizontal plane can be respectively connected with the beam slab reinforcement 4 so as to realize accurate positioning of the embedded reinforcement 2.
According to the guardrail construction method disclosed by the invention, the embedded bars 2 are manufactured into the embedded framework and then are installed, and the construction of the embedded bars 2 is not required to be carried out after the installation of the beam slab bars 4 is completed, so that the installation of the embedded bars 2 and the installation of the beam slab bars 4 can be carried out simultaneously, and the line production is adjusted to be parallel, so that the construction efficiency is greatly improved.
Although a few exemplary embodiments of the present invention have been shown above, it will be appreciated by those skilled in the art that changes may be made in these exemplary embodiments without departing from the principles or spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (12)
1. The locating jig frame for the guardrail embedded bars is characterized by comprising a longitudinal base, one or more groups of horizontal limiting parts which are arranged on the base and extend along the longitudinal bridge direction, and vertical limiting parts which are arranged on at least one side of each group of horizontal limiting parts; the longitudinal axis of the base is parallel to the longitudinal bridge direction;
wherein, the horizontal limiting part also comprises a positioning steel bar and a support pad arranged at the bottom of the positioning steel bar; the vertical limiting part is fixed on the base, a plurality of limiting grooves are formed in one side, facing the horizontal limiting part, of the vertical limiting part, and the limiting grooves are notch matched with the outline of the embedded steel bar.
2. The positioning jig frame of the guardrail embedded bars according to claim 1, wherein the positioning jig frame is provided with two groups of horizontal limiting parts, and the vertical limiting parts are arranged on two sides of a transverse bridge of the positioning jig frame and are arranged in parallel along the longitudinal axis of the base.
3. The positioning jig frame of the guardrail embedded bars according to claim 1, wherein positioning plates are arranged on two sides of a longitudinal axis of the positioning jig frame, and two ends of the vertical limiting part are fixed on the positioning plates in a detachable connection mode.
4. The positioning jig of guardrail embedded bars of claim 1, wherein the vertical limiting portion comprises a side channel steel, and the opening direction of the channel steel is opposite to the horizontal limiting portion.
5. The positioning jig of guardrail embedded bars of claim 1, wherein a handle is arranged at the top of the vertical limiting part.
6. The positioning jig of guardrail embedded bars according to claim 1, wherein the upper end surface of the base is provided with a carrying bracket.
7. The positioning jig of guardrail embedded bars of claim 1, wherein the bottom of the base is provided with supporting legs.
8. A construction method of a guardrail, the guardrail comprising embedded bars and rear connection bars, characterized in that the positioning jig of the guardrail embedded bars is adopted according to any one of claims 1-7, the construction method of the guardrail comprises the following steps:
setting up the positioning jig frame;
installing the embedded bars according to the preset positions of the horizontal limiting part and the vertical limiting part, and connecting the embedded bars with the positioning bars of the positioning jig frame into a whole to form an embedded framework;
carrying the pre-buried framework from the positioning jig frame to a designated mounting position;
and installing the rear connecting steel bars at the connecting position of the embedded framework so as to finish the construction of the guardrail.
9. The method of claim 8, wherein the embedded bars comprise a first embedded bar near the longitudinal axis and a second embedded bar near the first embedded bar and far from the longitudinal axis.
10. The method of constructing a guardrail according to claim 9, wherein the step of installing the embedded bars at predetermined positions of the horizontal and vertical limiting portions and integrally connecting the embedded bars with the positioning bars of the positioning jig to form the embedded skeleton comprises:
the first embedded bars/the second embedded bars are arranged on the vertical limiting parts through limiting grooves, and the bottoms of the first embedded bars/the second embedded bars are fixedly connected with positioning bars of the positioning jig frame.
11. The method of constructing a guardrail of claim 8, further comprising, prior to transporting the pre-buried framework from the positioning jig to the designated installation location:
and respectively withdrawing all the vertical limiting parts from the positioning jig frame.
12. The method of constructing a guardrail of claim 8, further comprising, prior to transporting the pre-buried framework from the positioning jig to the designated installation location:
and installing beam slab steel bars at the installation positions.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810506965.6A CN108560417B (en) | 2018-05-24 | 2018-05-24 | Quick construction method and positioning jig frame for guardrail |
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| CN201810506965.6A CN108560417B (en) | 2018-05-24 | 2018-05-24 | Quick construction method and positioning jig frame for guardrail |
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| CN108560417A CN108560417A (en) | 2018-09-21 |
| CN108560417B true CN108560417B (en) | 2024-02-06 |
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| CN110539099B (en) * | 2019-09-27 | 2024-03-12 | 中交第一航务工程局有限公司 | Adjustable jig frame for positioning reinforcement bars of precast beam guardrails and construction method of adjustable jig frame |
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| CN108560417A (en) | 2018-09-21 |
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