CN113756554A - Construction platform and construction method for cast-in-place reinforced concrete support cantilever scaffold - Google Patents
Construction platform and construction method for cast-in-place reinforced concrete support cantilever scaffold Download PDFInfo
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- CN113756554A CN113756554A CN202111181356.6A CN202111181356A CN113756554A CN 113756554 A CN113756554 A CN 113756554A CN 202111181356 A CN202111181356 A CN 202111181356A CN 113756554 A CN113756554 A CN 113756554A
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- reinforced concrete
- cantilever beam
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 67
- 238000010276 construction Methods 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 239000004567 concrete Substances 0.000 claims description 14
- 239000002689 soil Substances 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/18—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by cantilevers or other provisions mounted in openings in the building, e.g. window openings
-
- 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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/06—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
- E04G13/066—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for overhangs
-
- 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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a construction platform and a construction method of a cast-in-place reinforced concrete support cantilever scaffold, which comprises a reinforced concrete cantilever beam, pre-embedded anti-skid nails, pre-embedded anchor rings and diagonal steel cables; the root part of the reinforced concrete cantilever beam is connected with the main structure in a manner of embedding bars or reserving bars; the embedded anti-skid nails are divided into upper upright stanchion anti-skid nails and lower anti-skid nails, and the upper upright stanchion anti-skid nails are vertically arranged above one end of the reinforced concrete cantilever beam, which is far away from the main structure; the upright rods of the steel pipe scaffold are inserted into the upper upright rod anti-skid nails; the lower anti-skid nails are vertically arranged below one end of the reinforced concrete cantilever beam far away from the main structure; the embedded anchor ring is fixed on a main body structure above the reinforced concrete cantilever beam, and the embedded anchor ring and the lower anti-skid nails are positioned on the same vertical surface; one end of the cable-stayed steel rope is connected with the embedded anchor ring, and the other end of the cable-stayed steel rope is connected to the lower anti-skid nail. The invention has simple structure, strong universality and low cost, and is easy to popularize and apply.
Description
Technical Field
The invention relates to the technical field of construction of constructional engineering, in particular to a construction platform and a construction method of a cast-in-place reinforced concrete support cantilever scaffold.
Background
In the current building construction, the building provided with the basement is widely applied, and how to reasonably solve the problem of stability and safety of the external scaffold for basement construction becomes a normal problem; in addition, the attention degree of the whole industry to the construction period is higher and higher, and the application of the section steel overhanging type scaffold is more and more. Under the normal condition, the scaffold outside the basement is not detached in time, the construction of the next layer of structure is required, and the earth backfill is not in time; the pre-buried shaped steel of encorbelmenting of superstructure is difficult to handle the entrance to a cave and recovers the problem, has the quality hidden danger, also has great potential safety hazard in shaped steel installation.
Disclosure of Invention
The invention aims to provide a construction platform and a construction method for a cast-in-place reinforced concrete support cantilever scaffold, which aim to overcome the defects of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cast in situ reinforced concrete landing leg scaffold frame construction platform that encorbelments, includes: the system comprises a reinforced concrete cantilever beam, pre-embedded anti-skid nails, pre-embedded anchor rings and a diagonal steel cable;
the root part of the reinforced concrete cantilever beam is connected with the main structure in a manner of embedding bars or reserving bars;
the embedded anti-skid nails are divided into upper upright post anti-skid nails and lower anti-skid nails, and the upper upright post anti-skid nails are vertically arranged above one end of the reinforced concrete cantilever beam, which is far away from the main structure; the upright rods of the steel pipe scaffold are inserted into the upper upright rod anti-skid nails; the lower anti-skid nails are vertically arranged below one end of the reinforced concrete cantilever beam far away from the main structure;
the embedded anchor ring is fixed on a main body structure above the reinforced concrete cantilever beam, and the embedded anchor ring and the lower anti-skid nails are positioned on the same vertical surface; one end of the cable-stayed steel rope is connected with the embedded anchor ring, and the other end of the cable-stayed steel rope is connected to the lower anti-skid nail.
Preferably, the number of the upper upright stud anti-skid nails arranged on the reinforced concrete cantilever beam is two or more.
Preferably, the embedded anti-skid nails are threaded steel bars with diameters of 18-25 mm or prefabricated steel embedded parts.
Preferably, the width of the reinforced concrete cantilever beam is not less than 200 mm.
Preferably, the leakage length of the embedded antiskid nails is not less than 100 mm.
Preferably, the embedded anchor ring is made of round steel with the diameter of 16-22 mm.
The invention also discloses a construction method of the cast-in-place reinforced concrete support leg overhanging scaffold construction platform, which comprises the following steps:
1) utilizing external scaffolds around the basement as a support system for the construction of the reinforced concrete cantilever beam, erecting a template of the reinforced concrete cantilever beam, and binding reinforcing steel bars;
2) determining the placement position of the pre-embedded anti-skid nails, and welding and connecting the pre-embedded anti-skid nails with main bars of the reinforced concrete cantilever beam;
3) pouring concrete of the reinforced concrete cantilever beam; 1-3 days after the concrete pouring is finished, a first-layer overhanging scaffold can be set up according to the progress condition, but a support system under the overhanging beam cannot be dismantled at the moment;
4) if the scaffold around the basement needs to be dismantled in advance so as to fill the soil, the diagonal steel cables are connected with the lower pulling nodes and the pre-buried anchor rings preset in the outer wall or the side columns; or according to the actual situation, after the concrete strength of the reinforced concrete cantilever beam reaches the calculated strength grade of 100%, the external scaffolds around the basement are dismantled.
Has the advantages that: the invention has simple structure and strong universality, and can effectively replace the construction technology of the overhanging scaffold of the scaffold supporting system with the embedded profile steel structure as the bearing fulcrum; the invention has common materials, simple construction, clear structure, low cost and easy popularization and application.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a connection relationship diagram of upper upright stud studs and reinforced concrete cantilever beams;
FIG. 3 is a view showing a connection relationship between the lower stud and the reinforced concrete cantilever beam;
in the figure: a-structural floor slab, B-external wall or side column, C-basement or sandwich space, and D-basement external scaffold.
Detailed Description
Embodiments of the present invention will now be described with reference to the accompanying drawings, and those skilled in the art will understand that the following embodiments are illustrative of the present invention only, and should not be construed as limiting the scope of the present invention. The specific techniques, connections, conditions, or the like, which are not specified in the examples, are performed according to the techniques, connections, conditions, or the like described in the literature in the art or according to the product specification. The materials, instruments or equipment are not indicated by manufacturers, and all the materials, instruments or equipment are conventional products which can be obtained by purchasing.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "provided" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention are understood according to specific situations.
Referring to fig. 1 to 3, the present invention provides a construction platform for a cast-in-place reinforced concrete outrigger cantilever scaffold, including: the system comprises a reinforced concrete cantilever beam 1, pre-embedded anti-skid nails 2, pre-embedded anchor rings 3 and a diagonal steel cable 4;
the root part of the reinforced concrete cantilever beam 1 is connected with the main structure in a steel bar planting or reserved steel bar mode, and the reinforced concrete cantilever beam and the main structure can be poured simultaneously or separately for secondary pouring;
the embedded anti-skid nails 2 are divided into upper upright post anti-skid nails 21 and lower anti-skid nails 22, and the upper upright post anti-skid nails 21 are vertically arranged above one end of the reinforced concrete cantilever beam 1, which is far away from the main structure; the vertical rods of the steel pipe scaffold 5 are inserted into the upper vertical rod anti-skid nails 21; the upper upright anti-skid nails 21 can prevent the upright of the steel pipe scaffold 5 from sliding; the lower anti-skid nails 22 are vertically arranged below one end of the reinforced concrete cantilever beam 1 far away from the main structure;
the embedded anchor ring 3 is fixed on a main body structure above the reinforced concrete cantilever beam 1, and the embedded anchor ring 3 and the lower anti-skid nails 22 are positioned on the same vertical surface; one end of the cable-stayed steel rope 4 is connected with the embedded anchor ring 3, the other end of the cable-stayed steel rope is connected to the lower anti-skid nail 22, and the installed cable-stayed steel rope 4 is in a tightening state.
According to the further optimized scheme, the number of the upper upright anti-skid nails 21 arranged on the reinforced concrete cantilever beam 1 is two or more; generally, the number of the upper upright anti-skid nails 21 arranged on the reinforced concrete cantilever beam 1 is two; when a plurality of rows of upright rods are arranged according to the special requirement of the outer vertical surface model, a plurality of upper upright rod anti-skid nails 21 can be arranged according to the specific situation.
Specifically, the width of the reinforced concrete cantilever beam 1 is not less than 200mm, and the length is determined according to the space between the vertical rods of the frame body and the space between the frame body and the outer wall; the concrete strength of the reinforced concrete cantilever beam 1 is determined by calculation, early strength concrete is usually set, and the strength of the early strength concrete is generally not lower than C25; the reinforced concrete cantilever beam 1 can be marked with the same number as the outer wall concrete, the maintenance is to be strengthened, the arrangement position of the cantilever beam is arranged in a hidden beam area of the outer shear wall of the basement, and a building without the basement is arranged in a ground beam area.
Specifically, the embedded anti-skid nails 2 are twisted steel or prefabricated steel embedded parts with the diameter of 18-25 mm, and can also be common steel parts used in construction sites as the embedded anti-skid nails, so that the embedded anti-skid nails can be smoothly inserted into the steel pipe vertical rods; the leakage length of the pre-buried anti-skid nails 2 is not less than 100 mm; the embedded anchor ring 3 is made of round steel with the diameter of 16-22 mm, the embedded anchor ring 3 is embedded into the main body structure, and the embedded anchor ring protrudes out of the concrete surface for a certain distance, so that a steel rope installation space is reserved.
The invention discloses a construction method of the cast-in-place reinforced concrete support leg overhanging scaffold construction platform, which comprises the following steps:
1) utilizing external scaffolds around the basement as a support system for the construction of the reinforced concrete cantilever beam, erecting a template of the reinforced concrete cantilever beam, and binding reinforcing steel bars;
2) determining the placement position of the pre-embedded anti-skid nails, and welding and connecting the pre-embedded anti-skid nails with main bars of the reinforced concrete cantilever beam;
3) pouring concrete of the reinforced concrete cantilever beam; 1-3 days after the concrete pouring is finished, a first-layer overhanging scaffold can be set up according to the progress condition, but a support system under the overhanging beam cannot be dismantled at the moment;
4) if the scaffold around the basement needs to be dismantled in advance so as to fill the soil, the stayed steel cables are connected with the lower pulling nodes and the pre-buried anchor rings preset in the outer wall or the side columns to play the role of the steel cables; or according to the actual situation, after the concrete strength of the reinforced concrete cantilever beam reaches the calculated strength grade of 100%, the external scaffolds around the basement are dismantled.
After the cantilever outer scaffold reaches the dismantling condition and is dismantled, two different modes of breaking the reinforced concrete cantilever beam or reserving the reinforced concrete cantilever beam can be adopted according to the actual conditions of each project; after a breaking mode is adopted, the joint part needs to be repaired by painting; under the premise of not influencing the peripheral waterproof construction of the basement, the pipeline conditions of water heating, electricity and the like and the using function of the structure (if necessary, the design unit agrees), the method of reserving the reinforced concrete cantilever beam can be adopted.
The invention has simple structure, clear force transmission path and strong universality, can effectively solve the safety protection problem of the upper structure construction of the basement outer wall without filling soil, solves the engineering quality problems of reserved hole repair and the like caused by the current profile steel cantilever frame, improves the engineering quality and solves the potential safety hazard in the profile steel installation process.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (7)
1. The utility model provides a cast in situ reinforced concrete landing leg scaffold frame construction platform that encorbelments, its characterized in that includes: the steel reinforced concrete cantilever beam comprises a reinforced concrete cantilever beam (1), pre-embedded anti-skidding nails (2), pre-embedded anchor rings (3) and a diagonal steel cable (4);
the root part of the reinforced concrete cantilever beam (1) is connected with the main structure in a manner of planting bars or reserving bars; the embedded anti-skid nails (2) are divided into upper upright post anti-skid nails (21) and lower anti-skid nails (22), and the upper upright post anti-skid nails (21) are vertically arranged above one end, far away from the main structure, of the reinforced concrete cantilever beam (1); the vertical rods of the steel pipe scaffold (5) are inserted into the upper vertical rod anti-skid nails (21); the lower anti-skid nails (22) are vertically arranged below one end, far away from the main structure, of the reinforced concrete cantilever beam (1);
the embedded anchor ring (3) is fixed on a main body structure above the reinforced concrete cantilever beam (1), and the embedded anchor ring (3) and the lower anti-skid nails (22) are positioned on the same vertical surface; one end of the cable-stayed steel rope (4) is connected with the embedded anchor ring (3), and the other end of the cable-stayed steel rope is connected to the lower anti-skid nail (22).
2. A cast-in-place reinforced concrete leg overhanging scaffold construction platform as claimed in claim 1, wherein: the number of the upper upright anti-skid nails (21) arranged on the reinforced concrete cantilever beam (1) is two or more.
3. A cast-in-place reinforced concrete leg overhanging scaffold construction platform as claimed in claim 1, wherein: the embedded anti-skid nails (2) are threaded steel bars with the diameter of 18-25 mm or prefabricated steel embedded parts.
4. A cast-in-place reinforced concrete leg overhanging scaffold construction platform as claimed in claim 1 or 2, wherein: the width of the reinforced concrete cantilever beam (1) is not less than 200 mm.
5. A cast-in-place reinforced concrete leg overhanging scaffold construction platform as claimed in claim 1 or 3, wherein: the leakage length of the embedded anti-skid nails (2) is not less than 100 mm.
6. A cast-in-place reinforced concrete leg overhanging scaffold construction platform as claimed in claim 1, wherein: the embedded anchor ring (3) is made of round steel with the diameter of 16-22 mm.
7. A construction method using a cast-in-place reinforced concrete leg overhanging scaffold construction platform as claimed in any one of claims 1 to 6, wherein:
1) utilizing external scaffolds around the basement as a support system for the construction of the reinforced concrete cantilever beam (1), erecting a template of the reinforced concrete cantilever beam (1), and binding reinforcing steel bars;
2) determining the placement position of the pre-embedded anti-skid nails (2), and welding and connecting the pre-embedded anti-skid nails with the main reinforcement of the reinforced concrete cantilever beam (1);
3) pouring concrete of the reinforced concrete cantilever beam (1); 1-3 days after the concrete pouring is finished, a first-layer overhanging scaffold can be set up according to the progress condition, but a support system under the overhanging beam cannot be dismantled at the moment;
4) if the scaffold around the basement needs to be removed in advance so as to fill the soil, the stayed-cable steel ropes are connected with the lower pulling nodes (22) and the pre-embedded anchor rings (3) preset in the outer wall or the side columns, or the scaffold around the basement is removed after the concrete strength of the reinforced concrete cantilever beam reaches the calculated strength grade of 100% according to the actual situation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181356.6A CN113756554A (en) | 2021-10-11 | 2021-10-11 | Construction platform and construction method for cast-in-place reinforced concrete support cantilever scaffold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181356.6A CN113756554A (en) | 2021-10-11 | 2021-10-11 | Construction platform and construction method for cast-in-place reinforced concrete support cantilever scaffold |
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| Publication Number | Publication Date |
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| CN113756554A true CN113756554A (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111181356.6A Pending CN113756554A (en) | 2021-10-11 | 2021-10-11 | Construction platform and construction method for cast-in-place reinforced concrete support cantilever scaffold |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541570A (en) * | 2022-03-04 | 2022-05-27 | 中建八局第二建设有限公司 | Organ type outer vertical surface structure and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736893A (en) * | 2009-12-16 | 2010-06-16 | 通广建工集团有限公司 | Overhanging type scaffold supporting system |
| CN202596143U (en) * | 2012-05-29 | 2012-12-12 | 北京城建建设工程有限公司 | Overhanging double-pole scaffold |
| CN105672645A (en) * | 2016-03-29 | 2016-06-15 | 台州建筑安装工程公司 | Cantilever beam anchoring structure of projecting scaffold and cantilever beam anchoring construction method of cantilever beam anchoring structure |
| CN109555300A (en) * | 2018-12-27 | 2019-04-02 | 上海建工二建集团有限公司 | A kind of builder's jack |
| CN111946042A (en) * | 2020-08-25 | 2020-11-17 | 中建八局第四建设有限公司 | Method for building external scaffold of concrete cantilever structure and external scaffold device |
-
2021
- 2021-10-11 CN CN202111181356.6A patent/CN113756554A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736893A (en) * | 2009-12-16 | 2010-06-16 | 通广建工集团有限公司 | Overhanging type scaffold supporting system |
| CN202596143U (en) * | 2012-05-29 | 2012-12-12 | 北京城建建设工程有限公司 | Overhanging double-pole scaffold |
| CN105672645A (en) * | 2016-03-29 | 2016-06-15 | 台州建筑安装工程公司 | Cantilever beam anchoring structure of projecting scaffold and cantilever beam anchoring construction method of cantilever beam anchoring structure |
| CN109555300A (en) * | 2018-12-27 | 2019-04-02 | 上海建工二建集团有限公司 | A kind of builder's jack |
| CN111946042A (en) * | 2020-08-25 | 2020-11-17 | 中建八局第四建设有限公司 | Method for building external scaffold of concrete cantilever structure and external scaffold device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541570A (en) * | 2022-03-04 | 2022-05-27 | 中建八局第二建设有限公司 | Organ type outer vertical surface structure and construction method |
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Application publication date: 20211207 |