CN114703761A - Protective device for construction of road-crossing cast-in-place box girder and construction method thereof - Google Patents
Protective device for construction of road-crossing cast-in-place box girder and construction method thereof Download PDFInfo
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- CN114703761A CN114703761A CN202210502097.0A CN202210502097A CN114703761A CN 114703761 A CN114703761 A CN 114703761A CN 202210502097 A CN202210502097 A CN 202210502097A CN 114703761 A CN114703761 A CN 114703761A
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- 238000010276 construction Methods 0.000 title claims abstract description 89
- 230000001681 protective effect Effects 0.000 title claims abstract description 44
- 239000011120 plywood Substances 0.000 claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 238000005553 drilling Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 230000001012 protector Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 13
- 238000002360 preparation method Methods 0.000 abstract description 8
- 238000011900 installation process Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a protective device for construction of a road-crossing cast-in-place box beam and a construction method thereof. The plywood adopted by the invention can reduce the self weight of the structure and is convenient to process; in addition, the plywood is supported by the first wing plate and the second wing plate of each I-shaped steel, and the web plate of each I-shaped steel is fastened with the plywood by the pull rods to form a protection system, so that the construction method can fully utilize field materials for construction of the cross-road cast-in-place box girder, and reduce the construction preparation time.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a protective device for construction of a road-crossing cast-in-place box girder and a construction method thereof.
Background
At present, along with the wider and wider use of the cast-in-place box girder, a plurality of protective safety facilities applied to the cast-in-place box girder construction appear in the market. However, the conventional protection and safety setting body applied to the construction of the cross-road casting box beam adopts an integrated protection shed, for example, a structure of a large-flow road protection shed under limited clearance disclosed in the Chinese patent (publication number: CN114059825A), the protection structure comprises components such as a concrete enlarged foundation, a steel pipe pile, a section steel pad beam, a distribution beam, a dense mesh net and the like, corresponding materials need to be prepared in advance, and the integrated protection shed is formed by means of erection such as welding, fixing and the like so as to meet the construction safety and traffic passing capability. Because the number of parts of the protective structure is large, the problems that the construction preparation period is long, the material consumption is high, the erection process is complicated and the like exist in the road-crossing construction protective shed, namely the conventional road-crossing construction protective shed is relatively large in personnel equipment, materials and economic investment. Meanwhile, the protective shed can finish construction only by repeatedly closing the road for many times in the construction process, and the occupied time of the existing traffic road is long, so that the traffic capacity is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, one of the purposes of the invention is to provide a protective device with a simple structure for the construction of a road-crossing cast-in-place box girder, which is attached to a road-crossing cast-in-place box girder bracket for bottom-in-place protection, greatly reduces the preliminary material preparation and the setting time in the construction process, reduces the investment of personnel and equipment materials, and has obvious economic benefit; meanwhile, the installation process takes a short time.
The second purpose of the invention is to provide a construction method of the protective device for the construction of the cross-road casting box girder, which can greatly reduce the material preparation in the early stage and the erection time in the construction process, reduce the investment of personnel and equipment materials and has obvious economic benefit; meanwhile, the installation of the bottom pocket protection by adopting the closed half-width traffic lane effectively reduces the occupied time of the existing traffic road, and the social benefit is obvious.
One of the purposes of the invention is realized by adopting the following technical scheme:
the utility model provides a protector for be used for cast-in-place box girder construction of way strides, includes plywood, a plurality of pull rod and a plurality of I-steel, each the I-steel all set firmly in the bottom surface of plywood, each the I-steel all has first pterygoid lamina, web and second pterygoid lamina, first pterygoid lamina sets up and passes through with the second pterygoid lamina relatively the web is connected, the plywood passes through first pterygoid lamina and second pterygoid lamina bearing, the pull rod wears to locate web and plywood, pass through between pull rod and the web the first end of pull rod is fixed, the second end of pull rod is fixed in the terminal surface that is used for cast-in-place box girder construction support of way striding towards the road surface.
Furthermore, the end part of the pull rod, which is positioned at the lower end of the web plate, is sleeved with a first fastening piece for locking the pull rod and the web plate.
And furthermore, a lower chord is arranged on the construction support for the road-crossing cast-in-place box girder, and the second end of the pull rod penetrates through the lower chord and is fastened on the lower chord through a second fastener.
Further, two adjacent I-shaped steel are close to each other.
Furthermore, two adjacent I-shaped steel intervals evenly set up.
Furthermore, a plurality of twisted steel bars are fixedly arranged between the plywood and the I-shaped steel, and the twisted steel bars are perpendicular to the I-shaped steel.
Further, adjacent rebar is next to each other.
Further, adjacent twisted steel bars are arranged at even intervals.
Further, the opposite ends of each web are provided with the pull rods for tensioning the webs and the plywood.
The second purpose of the invention is realized by adopting the following technical scheme:
a construction method of a protective device for construction of a road-crossing cast-in-place box girder comprises the following steps:
s1: processing the composite board into plywood with different sizes according to the design form of the construction bracket for the road-crossing cast-in-place box girder;
s2: sequentially welding each twisted steel bar on the plane of each first wing plate and each second wing plate facing the plywood along the direction vertical to each I-shaped steel;
s3: drilling first through holes in the center positions of two end parts of each web plate, wherein each first through hole faces the plywood, and drilling second through holes in positions, corresponding to the first through holes, on the plywood;
s4: the pull rod matched with the first through hole and the second through hole sequentially penetrates through the first through hole and the second through hole from the bottom of the web plate, and is sleeved on the end part, located at the lower end of the web plate, of the pull rod through a first fixing nut and locked to form a pocket bottom protection device;
s5: the bottom pocket protection device is subjected to lifting operation construction by using a lifting type operation trolley, one end of the pull rod, which penetrates out of the second through hole, penetrates through a lower chord rod used for crossing the road cast-in-place box girder construction support and facing the road surface, and the end part of the pull rod, which penetrates out of the lower chord rod, is sleeved and locked by a second fixing nut so as to form an attached bottom pocket protection device used for protecting the construction of the crossing road cast-in-place box girder;
s6: in the construction step S5, the protector formed in the step S4 is installed on the closed half lane, and after the bottom protection formed in the step S4 is completed on the closed half lane, the closed half lane is released, and the closure is performed on the other half lane of the lane, and the installation of the protector formed in the step S4 is continued.
Compared with the prior art, the invention has the beneficial effects that:
1. the protective device adopts the plywood, so that the self weight of the structure can be reduced, and the processing is convenient; in addition, the protective device supports the plywood through the first wing plate and the second wing plate of each I-shaped steel, and fastens the web plate of each I-shaped steel with the plywood through each pull rod to form a protective system, so that the protective device can fully utilize field materials for construction of the cross-road cast-in-place box girder, and reduce the construction preparation time; compared with the structure of the traditional integral protective shed, the integral protective shed has a simple structure, is easy to operate, reduces the erection time in the construction process, reduces the investment of personnel and equipment materials, and has obvious economic benefit; meanwhile, the installation process takes a short time.
2. The construction method of the protective device adopts the closed half-width traffic lane to install the protective device, namely, the construction method of the protective device can finish the installation of the protective device by closing the left half-width and the right half-width of the traffic lane once respectively, and the traditional integral protective shed needs to close the traffic lane repeatedly in the construction process, so that the time of occupying the existing traffic lane is longer. Therefore, the construction method of the protective device can effectively reduce the occupied time of the existing traffic road, and has obvious social benefit.
3. The construction method of the protection device provided by the invention adopts the protection device provided by the invention, so that the construction method of the protection device can also reduce the preparation of materials in the early stage and the setting time in the construction process, reduce the investment of personnel and equipment materials, and has obvious economic benefit.
Drawings
FIG. 1 is a schematic view of the structure of the protection device of the present invention;
FIG. 2 is a schematic view of another angle structure of the protection device of the present invention;
FIG. 3 is a schematic structural view of an I-beam according to an embodiment of the present invention;
fig. 4 is a schematic structural view of the protective device applied to a construction support of a road-crossing cast-in-place box girder.
In the figure: 10. plywood; 20. i-shaped steel; 201. a web; 202. a first wing plate; 203. a second wing plate; 30. a pull rod; 31. a first fastener; 32. a second fastener; 40. twisted steel bars; 50. a support; 501. a lower chord.
Detailed Description
The present invention will be described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the following description, various embodiments or technical features may be arbitrarily combined to form a new embodiment without conflict.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The implementation mode is as follows:
referring to fig. 1 to 4, the invention shows a protection device for construction of a road-crossing cast-in-place box girder, which includes a plywood 10, a plurality of tie rods 30 and a plurality of i-beams 20, wherein each i-beam 20 is fixed on a bottom surface of the plywood 10, each i-beam 20 has a first wing plate 202, a web 201 and a second wing plate 203, the first wing plate 202 and the second wing plate 203 are oppositely arranged and connected through the web 201, the plywood 10 is supported by the first wing plate 202 and the second wing plate 203, the tie rods 30 are arranged through the web 201 and the plywood 10, the tie rods 30 and the web 201 are fixed through first end portions of the tie rods 30, and second end portions of the tie rods 30 are fixed on end surfaces, facing a road, of the construction supports 50 for the road-crossing cast-in-place box girder. Therefore, the protective device of the invention adopts the plywood 10, which can reduce the dead weight of the structure and is convenient to process; in addition, the protective device supports the plywood 10 through the first wing plate 202 and the second wing plate 203 of each I-steel 20, and fastens the web 201 of each I-steel 20 and the plywood 10 through each pull rod 30 to form a protective system, so that the protective device can fully utilize field materials for constructing the road-crossing cast-in-place box girder to reduce the construction preparation time; compared with the structure of the traditional integral protective shed, the protective device for the construction of the road-crossing cast-in-place box girder has a simple structure and is easy to operate, the erection time in the construction process is reduced, the investment of personnel and equipment materials is reduced, and the economic benefit is obvious; meanwhile, the installation process takes a short time.
In this embodiment, the end of the tie rod 30 located at the lower end of the web 201 is sleeved with a first fastening member 31 for fastening the tie rod 30 and the web 201, and the first fastening member 31 is a first fastening nut. That is, the first fastening nut is sleeved on the end portion of the pull rod 30 located at the lower end of the web 201 and is in threaded connection with the pull rod 30 to lock the pull rod 30 and the web 201, so as to form the protection device, thereby facilitating the disassembly and assembly of the pull rod 30 and the i-steel 20, further facilitating the disassembly and assembly of the pocket bottom protection device of the invention, and saving the erection time. Further, the construction support 50 for the road-crossing cast-in-place box girder is provided with a lower chord 501, and the second end of the pull rod 30 is inserted into the lower chord 501 and fastened on the lower chord 501 through a second fastener 32. The second fastening piece 32 is a second fastening nut, that is, the second fastening nut is sleeved on the end portion of the pull rod 30 penetrating out of the lower chord 501 and is in threaded connection with the pull rod 30, so that the formed pocket bottom protection device is fixedly installed on the lower chord 501, facing the road surface, of the cross-road cast-in-place box beam construction support 50, and therefore the phenomenon that an operator falls on the road surface in the process of constructing the cast-in-place box beam by standing on the cross-road cast-in-place box beam construction support 50 can be avoided, and construction safety and traffic passing capacity of the road surface are met.
In this embodiment, a plurality of twisted steel bars 40 are fixedly disposed between the plywood 10 and each i-beam 20, and each twisted steel bar 40 is perpendicular to each i-beam 20. That is, it can be understood that the reinforcing bars 40 are welded to the plane of the first wing plate 202 and the second wing plate 203 of the i-beams 20 facing the plywood-panel 10 to further support the plywood-panel 10 and enhance the load-bearing capacity of the plywood-panel 10. Therefore, the protective device for the construction of the cross-road cast-in-place box girder adopts the I-shaped steel 20 and the twisted steel 40 to support the plywood 10, the pull rod 30 sequentially penetrates through the web 201, the plywood 10 and the lower chord 501 of the I-shaped steel 20, the web 201 and the plywood 10 are fastened through the threaded connection of the first fixing nut and the pull rod 30, and finally the pull rod 30 is fastened on the lower chord 501 of the cross-road cast-in-place box girder construction support 50 (Bailey support 50) through the threaded connection of the second fixing nut and the pull rod 30, so that the protective device forms an attached bearing system to prevent objects falling from the road surface.
In this embodiment, the tie bars 30 for tightening the web 201 and the plywood 10 are provided at opposite ends of each web 201, so that the load-bearing capacity of the attachable load-bearing system can be further improved. Of course, in other embodiments, the inventor can also reasonably arrange the number of the tie rods 30 and the arrangement positions thereof according to the actual construction status, and therefore, the inventor should also fall within the protection scope of the present invention by reasonably changing the number of the tie rods 30 and the arrangement positions thereof.
In this embodiment, two adjacent i-beams 20 are positioned next to each other, which further increases the load-bearing capacity of the plywood 10. Of course, in other embodiments, the two adjacent i-beams 20 may be uniformly spaced, and are not limited herein, the arrangement structure of the two adjacent i-beams 20 may be determined by the inventor according to the load-bearing capacity of the plywood 10, and the number of the i-beams 20 is also determined by the inventor according to the load-bearing capacity of the plywood 10, and is not limited herein. Therefore, it is obvious to those skilled in the art that the number of the h-beams 20 and the arrangement of the h-beams 20 may be changed reasonably and fall within the protection scope of the present invention.
The invention also discloses a construction method of the protective device, which comprises the following steps:
s1: processing plywood with different sizes according to the design form of the construction support for the road-crossing cast-in-place box girder;
s2: sequentially welding each twisted steel bar on the plane of each first wing plate and each second wing plate facing the plywood along the direction vertical to each I-shaped steel;
s3: drilling first through holes in the center positions of the two end parts of each web plate, wherein each first through hole faces the plywood, and drilling second through holes in positions, corresponding to the first through holes, on the plywood;
s4: sequentially enabling the pull rod matched with the first through hole and the second through hole to penetrate through the first through hole and the second through hole from the bottom of the web plate, and sleeving the end part, located at the lower end of the web plate, of the pull rod through a first fixing nut and locking the end part to form a protection device;
s5: the protective device is subjected to lifting operation construction by using a lifting type operation trolley, one end of the pull rod, which penetrates out of the second through hole, penetrates through a lower chord rod, which is arranged on a construction support (a Bailey support) of the road-crossing cast-in-place box girder and faces the road surface, and the end part of the pull rod, which penetrates out of the lower chord rod, is sleeved and locked by a second fixing nut, so that the attached type pocket bottom protective device for protecting the road-crossing cast-in-place box girder construction is formed;
s6: in the construction step S5, the guard device formed in the step S4 is installed on the closed half lane, and after the guard device formed in the step S4 is installed on the closed half lane, the closed half lane is released, the closure is performed on the other half lane of the lane, and the installation of the guard device formed in the step S4 is continued.
Therefore, the construction method of the protective device for the construction of the cross-road cast-in-place box girder adopts the closed half-width traffic lane to install the protective device, namely, the construction method of the protective device can finish the installation of the protective device by closing the left half-width and the right half-width of the traffic lane once respectively, thereby effectively shortening the occupied time of the existing traffic road and having obvious social benefit; and the traditional integral protection shed structure needs to repeatedly seal the lane for multiple times in the construction process, and the time for occupying the existing traffic road is longer. In addition, the construction method of the protective device for the road-crossing cast-in-place box girder construction can reduce the initial material preparation and the setting time in the construction process, reduce the investment of personnel and equipment materials and have obvious economic benefit because the protective device is applied to the construction method of the protective device.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are intended to be covered by the claims.
Claims (10)
1. The utility model provides a protector for be used for cast-in-place box girder construction of way strides, a serial communication port, including plywood, a plurality of pull rod and a plurality of I-steel, each the I-steel all is fixed in the bottom surface of plywood, each the I-steel all has first pterygoid lamina, web and second pterygoid lamina, first pterygoid lamina sets up with the second pterygoid lamina is relative and passes through the web is connected, the plywood passes through first pterygoid lamina and second pterygoid lamina bearing, the pull rod wears to locate web and plywood, pass through between pull rod and the web the first end of pull rod is fixed, the second end of pull rod is fixed in the terminal surface that is used for cast-in-place box girder construction support of way strides towards the road surface.
2. The protection device for construction of the cross-road cast-in-place box girder as claimed in claim 1, wherein the end of the pull rod at the lower end of the web plate is sleeved with a first fastening member for locking the pull rod with the web plate.
3. The protection device for construction of the road-crossing cast-in-place box girder is characterized in that a lower chord is arranged on the construction support for the road-crossing cast-in-place box girder, and a second end of the pull rod penetrates through the lower chord and is fastened on the lower chord through a second fastening piece.
4. The protection device for construction of the cross-road cast-in-place box girder, as claimed in claim 1, wherein two adjacent i-beams are close to each other.
5. The protection device for construction of the road-crossing cast-in-place box girder as claimed in claim 1, wherein two adjacent i-beams are uniformly spaced.
6. The protection device for construction of the road-crossing cast-in-place box girder of claim 1, wherein a plurality of deformed steel bars are fixedly arranged between the plywood and the I-shaped steel, and each deformed steel bar is arranged perpendicular to each I-shaped steel.
7. A guard for a road-crossing cast-in-place box beam construction as claimed in claim 6, wherein adjacent rebar is in close proximity to each other.
8. The protection device for construction of the cross-road cast-in-place box girder according to claim 6, wherein adjacent twisted steel bars are uniformly spaced.
9. A fender assembly for use in constructing a cast-in-place box beam across a roadway according to claim 1 wherein opposite ends of each web are provided with said tie rods for tensioning the web and plywood.
10. A construction method of a protective device for construction of a road-crossing cast-in-place box girder according to any one of claims 1 to 9, comprising the steps of:
s1: processing plywood with different sizes according to the design form of the construction support for the road-crossing cast-in-place box girder;
s2: sequentially welding each twisted steel bar on the plane of each first wing plate and each second wing plate facing the plywood along the direction vertical to each I-shaped steel;
s3: drilling first through holes in the center positions of two end parts of each web plate, wherein each first through hole faces the plywood, and drilling second through holes in positions, corresponding to the first through holes, on the plywood;
s4: the pull rod matched with the first through hole and the second through hole sequentially penetrates through the first through hole and the second through hole from the bottom of the web plate, and is sleeved at the end part, located at the lower end of the web plate, of the pull rod through a first fixing nut and locked to form a pocket bottom protection device;
s5: lifting operation construction is carried out on the pocket bottom protection device by using a lifting type operation trolley, one end of the pull rod penetrating out of the second through hole penetrates through a lower chord used for a road-crossing cast-in-place box girder construction support to face the road surface, and the end part of the pull rod penetrating out of the lower chord is sleeved and locked by a second fixing nut so as to form an attached pocket bottom protection device used for protecting road-crossing cast-in-place box girder construction;
s6: in the construction step S5, the guard device formed in the step S4 is installed on the closed half lane, and after the guard device formed in the step S4 is installed on the closed half lane, the closed half lane is released, the closure is performed on the other half lane of the lane, and the installation of the guard device formed in the step S4 is continued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210502097.0A CN114703761A (en) | 2022-05-09 | 2022-05-09 | Protective device for construction of road-crossing cast-in-place box girder and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210502097.0A CN114703761A (en) | 2022-05-09 | 2022-05-09 | Protective device for construction of road-crossing cast-in-place box girder and construction method thereof |
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|---|---|
| CN114703761A true CN114703761A (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210502097.0A Pending CN114703761A (en) | 2022-05-09 | 2022-05-09 | Protective device for construction of road-crossing cast-in-place box girder and construction method thereof |
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| CN (1) | CN114703761A (en) |
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| CN202247688U (en) * | 2011-09-23 | 2012-05-30 | 中铁十一局集团有限公司 | Aerodynamic force prevention protecting shed frame for overpassing of high-speed railways |
| JP2012102526A (en) * | 2010-11-10 | 2012-05-31 | Nippon Steel & Sumikin Metal Products Co Ltd | Installation method, installation structure and attaching metal fitting for falling object prevention fence |
| CN207484301U (en) * | 2017-11-21 | 2018-06-12 | 中交二航局第二工程有限公司 | Across the protective device of existing line steel box girder construction |
| CN108824212A (en) * | 2018-07-31 | 2018-11-16 | 中铁六局集团石家庄铁路建设有限公司 | A kind of means of defence that continuous beam suspended bracket cantilever method is constructed to existing traffic |
| CN208899335U (en) * | 2018-08-02 | 2019-05-24 | 中南建设集团有限公司 | A kind of inverted T-shaped is across both wired precast beam protective stents |
| CN211498508U (en) * | 2019-12-04 | 2020-09-15 | 浙江华恒交通建设监理有限公司 | Assembled pocket bottom protection device |
| CN113005900A (en) * | 2019-12-20 | 2021-06-22 | 中交第一航务工程局有限公司 | Inverted protection shed and mounting and dismounting method thereof |
| CN213978609U (en) * | 2020-10-16 | 2021-08-17 | 中国建筑第四工程局有限公司 | Pocket bottom protection platform for cross-line bridge hanging basket construction |
-
2022
- 2022-05-09 CN CN202210502097.0A patent/CN114703761A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012102526A (en) * | 2010-11-10 | 2012-05-31 | Nippon Steel & Sumikin Metal Products Co Ltd | Installation method, installation structure and attaching metal fitting for falling object prevention fence |
| CN202247688U (en) * | 2011-09-23 | 2012-05-30 | 中铁十一局集团有限公司 | Aerodynamic force prevention protecting shed frame for overpassing of high-speed railways |
| CN207484301U (en) * | 2017-11-21 | 2018-06-12 | 中交二航局第二工程有限公司 | Across the protective device of existing line steel box girder construction |
| CN108824212A (en) * | 2018-07-31 | 2018-11-16 | 中铁六局集团石家庄铁路建设有限公司 | A kind of means of defence that continuous beam suspended bracket cantilever method is constructed to existing traffic |
| CN208899335U (en) * | 2018-08-02 | 2019-05-24 | 中南建设集团有限公司 | A kind of inverted T-shaped is across both wired precast beam protective stents |
| CN211498508U (en) * | 2019-12-04 | 2020-09-15 | 浙江华恒交通建设监理有限公司 | Assembled pocket bottom protection device |
| CN113005900A (en) * | 2019-12-20 | 2021-06-22 | 中交第一航务工程局有限公司 | Inverted protection shed and mounting and dismounting method thereof |
| CN213978609U (en) * | 2020-10-16 | 2021-08-17 | 中国建筑第四工程局有限公司 | Pocket bottom protection platform for cross-line bridge hanging basket construction |
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Application publication date: 20220705 |