CN111188508A - Supplement plate of existing cantilever floor slab of building structure and construction method thereof - Google Patents
Supplement plate of existing cantilever floor slab of building structure and construction method thereof Download PDFInfo
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- CN111188508A CN111188508A CN202010116454.0A CN202010116454A CN111188508A CN 111188508 A CN111188508 A CN 111188508A CN 202010116454 A CN202010116454 A CN 202010116454A CN 111188508 A CN111188508 A CN 111188508A
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- 239000013589 supplement Substances 0.000 title claims abstract description 15
- 238000010276 construction Methods 0.000 title abstract description 30
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000007596 consolidation process Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000002787 reinforcement Effects 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 230000000153 supplemental effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 4
- 210000003205 muscle Anatomy 0.000 description 8
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0266—Enlarging
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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides a supplement plate of an existing overhanging floor slab of a building structure and a construction method thereof, wherein the supplement plate comprises: the girth beam is arranged on the building structure and is arranged below the existing overhanging floor along the outer edge direction of the existing overhanging floor; the platform plate is provided with a notch matched with the shape of the existing overhanging floor slab, the existing overhanging floor slab is embedded in the notch, the platform plate and the existing overhanging floor slab are connected with the switching ribs, and one side of the platform plate, which is far away from the existing overhanging floor slab, is lapped on the girt; the disassembly-free side plate is vertically arranged on the girt beam, and a pouring space is formed between the disassembly-free side plate and the existing overhanging floor slab; and the concrete consolidation body comprises a patch plate reinforcing steel bar and concrete, the patch plate reinforcing steel bar is accommodated in the pouring space, the patch plate reinforcing steel bar is implanted into the existing overhanging floor slab, and the concrete is filled in the pouring space and covers the patch plate reinforcing steel bar. The invention solves the problems of difficult erection of the frame body and long construction period when a newly added cantilever structure is added on the existing structure by adopting the traditional construction process.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a supplementary plate of an existing overhanging floor slab of a building structure and a construction method thereof.
Background
Along with the development of urban construction, the quantity of demolition and modification projects is increasing day by day. For the newly-added overhanging structure, the traditional frame body-template-reinforcing steel bar-concrete construction process is still adopted, and the structure supplement scheme of layer-by-layer construction from the bottom layer to the top layer has the problems of difficult frame body erection, complex template splicing, longer construction period, more quality safety hidden dangers and the like.
The newly-added overhanging structure design has a lot of conflicts with the old building, and aiming at the special-shaped overhanging part, if a construction scheme of dismantling all the original overhanging structures is adopted, the problems of high dismantling cost, protection measure cost, long construction period and the like exist.
Disclosure of Invention
In order to overcome the defects in the prior art, the supplement plate of the existing cantilever floor slab of the building structure and the construction method thereof are provided so as to solve the problems of difficult erection of the frame body and long construction period when the cantilever structure is newly added on the existing structure by adopting the traditional construction process.
In order to achieve the above object, there is provided a supplementary plate of an existing cantilever floor of a building structure, comprising:
the enclosure beam is arranged below the existing overhanging floor along the outer edge direction of the existing overhanging floor;
the platform plate is provided with a notch matched with the shape of the existing overhanging floor slab, the existing overhanging floor slab is embedded in the notch, the platform plate and the existing overhanging floor slab are connected with a switching rib, and one side of the platform plate, which is far away from the existing overhanging floor slab, is lapped on the girt;
the disassembly-free side plates are vertically arranged on the girth beam along the length direction of the girth beam, and a pouring space is formed between the disassembly-free side plates and the existing overhanging floor slab; and
the concrete consolidation body comprises a patch reinforcing steel bar and concrete, the patch reinforcing steel bar is contained in the pouring space, the patch reinforcing steel bar is implanted into the existing overhanging floor slab, and the concrete is filled in the pouring space and covers the patch reinforcing steel bar.
Further, the first end of switching muscle connect in the upper surface of landing slab, the second end of switching muscle connect in the reinforcing bar of existing floor of encorbelmenting.
Further, the switching muscle including connect in the first end of the reinforcing bar of existing floor of encorbelmenting, connect in the second tip of the upper surface of landing slab, and connect in first end with the switching portion between the second tip.
Furthermore, the girth beam and the platform plate are respectively provided with anti-sliding studs.
Further, exempt from to tear open the curb plate and include first flange board and second flange board, first flange board laminate in enclose the upper surface of roof beam, second flange board erects to be located on the first flange board, second flange board with existing formation between the floor of encorbelmenting pour the space.
Further, the bottom of the platform plate is flush with the bottom of the existing cantilever floor.
Furthermore, the girt is a steel section and a steel beam.
Furthermore, the terminal surface of shaped steel girder steel is connected with the end plate, the end plate pass through the fastener install in building structure.
Furthermore, the bottom of shaped steel girder and the slant is connected with support piece between the building structure.
The invention provides a construction method of an additional plate of an existing overhanging floor slab of a building structure, which comprises the following steps:
installing a girt beam on a building structure, so that the girt beam is arranged below an existing overhanging floor along the outer edge direction of the existing overhanging floor;
overlapping one side, far away from the notch, of the platform plate to the girt, sleeving the notch of the platform plate on the outer edge of the existing overhanging floor slab, and connecting the adapter ribs to the platform plate and the existing overhanging floor slab;
vertically arranging a disassembly-free side plate on the girt along the length direction of the girt, so that a pouring space is formed between the disassembly-free side plate and the existing overhanging floor slab;
accommodating the reinforcing steel bars of the supplementing plate in the pouring space, and implanting the reinforcing steel bars of the supplementing plate into the existing overhanging floor slab;
and filling concrete in the pouring space, wherein the concrete covers the reinforcing steel bars of the reinforcing plate to be solidified to form the reinforcing plate.
The invention has the advantages that the supplementary plate of the existing overhanging floor of the building structure not only avoids the traditional working procedures of erecting a frame body, erecting and dismantling a template and the like on the premise of keeping the original structure, but also saves the construction cost of dismantling the existing overhanging floor and reduces the construction cost of a newly-built supplementary plate (utilizing the existing overhanging floor); on the other hand, the supplement plate of the existing overhanging floor slab of the building structure avoids the defect that the traditional construction needs layer by layer, can synchronously carry out the construction of multiple layers of supplement plates, and shortens the construction period while ensuring the construction quality.
Drawings
Fig. 1 is a schematic structural view of an existing overhanging floor slab supplemental panel of a building structure according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view taken at a-a in fig. 1.
Fig. 3 is a schematic diagram of arrangement of slab reinforcement bars of a slab reinforcement of an existing cantilever floor of a building structure according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Fig. 1 is a schematic structural view of an existing overhanging floor slab supplementary slab of a building structure according to an embodiment of the present invention, fig. 2 is a cross-sectional view taken at a-a in fig. 1, and fig. 3 is a schematic view of a supplementary slab reinforcement arrangement of an existing overhanging floor slab supplementary slab of a building structure according to an embodiment of the present invention.
Referring to fig. 1 to 3, the present invention provides an supplementary panel for an existing cantilever floor of a building structure, comprising: the concrete beam comprises a girt 1, a platform plate 2, a disassembly-free side plate 3 and a concrete consolidation body.
In this embodiment, the building structure 6 is a ring beam, and an existing overhanging floor 7 is formed on the outer side of the building structure 6. Wherein the girt 1 is mounted to the outside of the building structure 6. The girt 1 is arranged below the existing overhanging floor 7 along the outer edge direction of the existing overhanging floor 7.
The platform plate 2 is formed with a gap. The shape of the gap of the platform plate is matched with the shape of the existing overhanging floor 7. The existing overhanging floor 7 is embedded in the gap. The platform plate 2 is connected to the existing overhanging floor 7 through the switching rib. One side of the platform plate 2 far away from the existing overhanging floor 7 is lapped on the upper surface of the girt 1.
The disassembly-free side plate 3 is vertically arranged on the girt 1 along the length direction of the girt 1. A pouring space is formed between the disassembly-free side plate 3 and the existing overhanging floor 7.
The concrete solidification body comprises the patch steel bars 41 and concrete. The patch reinforcement 41 is received in the casting space. One end of the reinforcing bar 41 connected to the existing cantilever floor 7 is embedded in the existing cantilever floor 7, and the other end of the reinforcing bar 41 connected to the existing building structure 6 is embedded in the building structure 6. The concrete is filled in the pouring space and covers the reinforcing steel bars 41 of the supplementary slab to be solidified to form the supplementary slab of the existing overhanging floor slab.
The supplementary plate of the existing overhanging floor of the building structure not only avoids the traditional working procedures of erecting a frame body, erecting and dismantling a template and the like on the premise of keeping the original structure, but also saves the construction cost of dismantling the existing overhanging floor and reduces the construction cost of a newly-built supplementary plate (by utilizing the existing overhanging floor); on the other hand, the supplement plate of the existing overhanging floor slab of the building structure avoids the defect that the traditional construction needs layer by layer, can synchronously carry out the construction of multiple layers of supplement plates, and shortens the construction period while ensuring the construction quality.
In the present embodiment, the girt 1 is a steel section beam. The end face of the section steel girder is connected with an end plate. The end plates of the steel section beams are mounted to the building structure 6 by fasteners. Specifically, the end plates are mounted on the outer side faces of the ring beams through high-strength bolts.
In some embodiments, a support member is connected diagonally between the bottom of the steel section beam and the building structure.
The supporting piece is a supporting rod or a stiffening plate
In some embodiments, a diagonal member is diagonally pulled between the side of the steel section beam away from the building structure and the building structure. The inclined pulling piece is a hanging rod or a hanging rope.
In this embodiment the bottom of the landing slab 2 is flush with the bottom of the existing overhanging floor slab 7. After the supplementary board is poured and formed, the platform board, exempt from to tear open the permanent part that the curb plate all regarded as the supplementary board, avoid the later stage on the one hand to demolish the process, on the other hand has improved the structural strength who adds the supplementary board, guarantees the construction quality who adds the supplementary board.
In this embodiment, the flat deck is a patterned steel plate.
In this embodiment, the transfer ribs are Z-shaped. The first end of switching muscle 21 is connected in the upper surface of landing slab 2, and the second end of switching muscle 21 is connected in the reinforcing bar of existing floor 7 of encorbelmenting.
Specifically, the adapter rib 21 includes a first end portion, a second end portion, and an adapter portion. The first end of the adapter rib 21 is connected to the reinforcing steel bar of the existing cantilever floor 7. The first end plate of the switching rib of the butt joint building structure is connected with the upper side reinforcing steel bar of the ring beam. The second end of the adapter rib 21 is attached to the upper surface of the deck plate 2. The transition portion of the transition rib 21 is vertically connected between the first end portion and the second end portion.
In a preferred embodiment, the first end portion, the second end portion and the adapter portion are integrally formed. The adapter bar 21 is a Z-shaped steel bar formed by bending a full-length steel bar twice in opposite directions. The first end of the switching rib is welded and connected with the upper layer steel bar of the ring beam or the steel bar of the existing overhanging floor slab. The second end of the switching rib is welded and connected to the upper surface of the platform plate.
In a preferred embodiment, the girt 1 and the deck 2 are provided with anti-skid pegs 5, respectively.
In the present embodiment, in order to improve the sealing performance of the casting space, the non-dismantling side panel 3 includes a first flange plate and a second flange plate. The first flange plate is attached to the upper surface of the girt 1. The second flange plate is vertically arranged on the first flange plate. A pouring space is formed between the second flange plate and the existing overhanging floor 7.
Preferably, the first flange plate and the second flange plate are arranged at an angle of 90 °. In this embodiment, the non-detachable side plate is an angle steel. The first flange plate welded connection of angle steel is in the upper surface of shaped steel girder steel. The shaped steel girder steel is the U type, exempts from to tear open the shape of curb plate and shaped steel girder steel's shape looks adaptation.
The invention provides a construction method of an additional plate of an existing overhanging floor slab of a building structure, which comprises the following steps:
s1: the girt beam 1 is installed on the building structure 6, so that the girt beam 1 is arranged below the existing cantilever floor 7 along the outer edge direction of the existing cantilever floor 7.
Specifically, in this embodiment, the girt includes two overhanging sections and a connecting section connected between the two overhanging sections. And the two overhanging sections are respectively arranged below two opposite sides of the existing overhanging floor slab. The fixed ends of the two overhanging sections are respectively connected with end plates, and the end plates are arranged on the outer side surface of the building structure through high-strength bolts.
S2: with one side overlap joint in girt 1 of keeping away from the breach of landing slab 2, locate the outer fringe of existing floor 7 of encorbelmenting with the breach cover of landing slab 2 to connect switching muscle 21 in landing slab 2 and existing floor 7 of encorbelmenting.
In this embodiment, the deck slab is notched according to the shape and size of the existing cantilever floor. One side of the platform plate, which is far away from the notch, is welded and lapped on the girth beam, and one side of the notch of the platform plate is connected with the switching rib. The second end welded connection of switching muscle in one side of landing slab, with the first end welded connection of switching muscle in the existing steel bar structure who encorbelments the floor. And before welding, chiseling reinforcing steel bars on the outer side surfaces of the existing overhanging floor slab and the building structure. The bottom surface of the platform plate is flush with the bottom surface of the existing overhanging floor slab.
S3: the disassembly-free side plate 3 is vertically arranged on the girt 1 along the length direction of the girt 1, so that a pouring space is formed between the disassembly-free side plate 3 and the existing overhanging floor 7.
The disassembly-free side plates are welded on the girt and are angle steels in the embodiment. The disassembly-free measuring die is continuously arranged along the length direction of the girt beam. Specifically, the first flange plate is attached to the upper surface of the girt beam and connected to the upper surface of the girt beam in a welding mode, and a pouring space is formed between the first flange plate and the existing overhanging floor.
And anti-skid studs are welded on the platform plate and the girt beam.
In a preferred embodiment, the girt, the platform plate and the non-detachable side plate can be pre-assembled.
Further, a support member is mounted between the girt and the facade of the building structure. The supporting piece is obliquely arranged.
In some embodiments, the overhanging section of the girt has a fixed end and an overhanging end. The fixed end of the overhanging section is connected with an end plate, and an oblique pulling piece is obliquely pulled and tied between the overhanging section and the outer vertical surface of the building structure.
S4: and accommodating the reinforcing steel bars 41 of the patch plate in the pouring space, and implanting the reinforcing steel bars 41 of the patch plate into the existing overhanging floor slab 7.
And binding the reinforcing steel bars of the patch boards, and arranging the reinforcing steel bars of the patch boards in the pouring space. Respectively implanting the end parts of the reinforcing steel bars close to the building structure into the building structure at corresponding positions; and respectively implanting the end parts of the reinforcing steel bars of the supplementing plates, which are close to the existing overhanging floor slabs, into the existing overhanging floor slabs at the corresponding positions.
S5: and filling concrete in the pouring space, and coating the reinforcing steel bars 41 of the patch with the concrete to be solidified to form the patch.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the invention is to be defined by the scope of the appended claims.
Claims (10)
1. The utility model provides a building structure's existing floor that encorbelments augmentor board, its characterized in that includes:
the enclosure beam is arranged below the existing overhanging floor along the outer edge direction of the existing overhanging floor;
the platform plate is provided with a notch matched with the shape of the existing overhanging floor slab, the existing overhanging floor slab is embedded in the notch, the platform plate and the existing overhanging floor slab are connected with a switching rib, and one side of the platform plate, which is far away from the existing overhanging floor slab, is lapped on the girt;
the disassembly-free side plates are vertically arranged on the girth beam along the length direction of the girth beam, and a pouring space is formed between the disassembly-free side plates and the existing overhanging floor slab; and
the concrete consolidation body comprises a patch reinforcing steel bar and concrete, the patch reinforcing steel bar is contained in the pouring space, the patch reinforcing steel bar is implanted into the existing overhanging floor slab, and the concrete is filled in the pouring space and covers the patch reinforcing steel bar.
2. The supplement panel for an existing cantilever floor of a building structure according to claim 1, wherein a first end of the adapter rib is connected to an upper surface of the deck, and a second end of the adapter rib is connected to the reinforcement of the existing cantilever floor.
3. The supplement panel for an existing cantilever floor of a building structure according to claim 2, wherein the adapter rib includes a first end portion connected to a reinforcing bar of the existing cantilever floor, a second end portion connected to an upper surface of the deck, and an adapter portion connected between the first end portion and the second end portion.
4. An additional panel for an existing overhanging floor slab of a building structure as claimed in claim 1 wherein said girt and said landing panel are provided with anti-skid studs respectively.
5. The supplement panel for an existing cantilever floor of a building structure according to claim 1, wherein the disassembly-free side panel comprises a first flange plate and a second flange plate, the first flange plate is attached to the upper surface of the girt, the second flange plate is vertically arranged on the first flange plate, and the pouring space is formed between the second flange plate and the existing cantilever floor.
6. The supplemental panel for an existing overhanging floor of a building structure of claim 1, wherein the bottom of the landing panel is flush with the bottom of the existing overhanging floor.
7. The supplemental panel for an existing overhanging floor of a building structure of claim 1, wherein the girt is a steel section beam.
8. The supplement panel for an existing cantilever floor of a building structure of claim 7, wherein an end plate is connected to an end surface of the steel section beam, and the end plate is mounted to the building structure by a fastener.
9. The supplement panel for an existing cantilever floor of a building structure of claim 7, wherein a support member is diagonally connected between the bottom of the steel section beam and the building structure.
10. A method of constructing an existing overhanging floor slab supplementary panel for a building structure as claimed in any one of claims 1 to 9, comprising the steps of:
installing a girt beam on a building structure, so that the girt beam is arranged below an existing overhanging floor along the outer edge direction of the existing overhanging floor;
overlapping one side, far away from the notch, of the platform plate to the girt, sleeving the notch of the platform plate on the outer edge of the existing overhanging floor slab, and connecting the adapter ribs to the platform plate and the existing overhanging floor slab;
vertically arranging a disassembly-free side plate on the girt along the length direction of the girt, so that a pouring space is formed between the disassembly-free side plate and the existing overhanging floor slab;
accommodating the reinforcing steel bars of the supplementing plate in the pouring space, and implanting the reinforcing steel bars of the supplementing plate into the existing overhanging floor slab;
and filling concrete in the pouring space, wherein the concrete covers the reinforcing steel bars of the reinforcing plate to be solidified to form the reinforcing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010116454.0A CN111188508A (en) | 2020-02-25 | 2020-02-25 | Supplement plate of existing cantilever floor slab of building structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010116454.0A CN111188508A (en) | 2020-02-25 | 2020-02-25 | Supplement plate of existing cantilever floor slab of building structure and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111188508A true CN111188508A (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010116454.0A Pending CN111188508A (en) | 2020-02-25 | 2020-02-25 | Supplement plate of existing cantilever floor slab of building structure and construction method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN111188508A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151286A (en) * | 2021-11-05 | 2022-03-08 | 上海风领新能源有限公司 | Buttress wall wind power tower cylinder |
| CN115478706A (en) * | 2022-09-05 | 2022-12-16 | 中建八局第三建设有限公司 | Construction method for widening corridor with cantilever structure |
| CN116411708A (en) * | 2023-03-31 | 2023-07-11 | 上海宝冶集团有限公司 | Mold-removing-free construction method for outer picking end of fabricated floor support plate |
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| JP2009209585A (en) * | 2008-03-05 | 2009-09-17 | Takenaka Komuten Co Ltd | Seismic strengthening method and seismic strengthening structure of existing building |
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- 2020-02-25 CN CN202010116454.0A patent/CN111188508A/en active Pending
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| JP2009209585A (en) * | 2008-03-05 | 2009-09-17 | Takenaka Komuten Co Ltd | Seismic strengthening method and seismic strengthening structure of existing building |
| CN101892706A (en) * | 2010-07-09 | 2010-11-24 | 浙江大学 | Current building renovation external energy-saving balcony structure system |
| CN101949191A (en) * | 2010-09-06 | 2011-01-19 | 中国建筑第八工程局有限公司 | Method for constructing unsupported super-long irregularly-shaped overhanging floor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114151286A (en) * | 2021-11-05 | 2022-03-08 | 上海风领新能源有限公司 | Buttress wall wind power tower cylinder |
| CN115478706A (en) * | 2022-09-05 | 2022-12-16 | 中建八局第三建设有限公司 | Construction method for widening corridor with cantilever structure |
| CN116411708A (en) * | 2023-03-31 | 2023-07-11 | 上海宝冶集团有限公司 | Mold-removing-free construction method for outer picking end of fabricated floor support plate |
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