CN116591468A - Temporary supporting device of concrete overhanging structure and construction method thereof - Google Patents
Temporary supporting device of concrete overhanging structure and construction method thereof Download PDFInfo
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- CN116591468A CN116591468A CN202310262657.4A CN202310262657A CN116591468A CN 116591468 A CN116591468 A CN 116591468A CN 202310262657 A CN202310262657 A CN 202310262657A CN 116591468 A CN116591468 A CN 116591468A
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- 239000004567 concrete Substances 0.000 title claims abstract description 91
- 238000010276 construction Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 238000013461 design Methods 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 4
- 239000011265 semifinished product Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract 1
- 239000011150 reinforced concrete Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000009435 building construction Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
Abstract
The application discloses a temporary supporting device of a concrete cantilever structure and a construction method, wherein the construction method comprises the following steps: completing the manufacture and installation of the temporary supporting device and the safety protection device; binding the reinforcing steel bars of the concrete cantilever plate on the upper surface of the bottom plate; sleeving and fixing the first connecting piece by using a PVC protective tube; pouring floor bearing plate concrete and cantilever plate concrete in sequence; when the integral strength of the cantilever plate concrete reaches 75% of the design strength, the first connecting piece and the PVC protective tube are removed, and the reserved holes are poured by micro-expansion concrete; and when the integral strength of the cantilever plate concrete reaches 100% of the design strength, removing the temporary supporting device. The application realizes the one-time pouring of the inner side steel bar truss plate and the outer side steel bar concrete cantilever plate, improves the structural integrity and ensures the safety, the reliability and the durability; the construction period is saved, 56 days required by the prior art are reduced to 28 days, the manual operation efficiency is improved, the comprehensive cost is reduced, and the safety of the edge operator is ensured.
Description
Technical Field
The application relates to the field of building construction, in particular to a temporary supporting device of a concrete overhanging structure and a construction method thereof.
Background
Along with the remarkable improvement of the living standard of people, the more the people tend to get good things, the more the building appearance is developed and changed. The method is characterized in that the practical function of the building is emphasized during engineering construction planning, the aesthetic function of the building and the landmark performance are emphasized, and continuous innovation and breakthrough of the appearance of the building are realized, so that the building realizes unification and balance of technical spirit and cultural implications.
One of the important ways to realize the innovation and breakthrough of the architectural appearance is the building of the floor overhanging structure. In the prior art, as shown in fig. 6, the concrete construction of the type of the inner steel bar truss floor support plate and the outer steel bar concrete cantilever plate is analyzed from the stress condition of the truss floor support plate, the steel bars at the cantilever part are required to be reserved, the concrete casting of the inner steel bar truss floor support plate is firstly carried out, and after the concrete strength of the inner steel bar truss floor support plate reaches the design requirement (28 days), the concrete casting construction of the outer cantilever part is carried out. And the concrete template is required to be arranged on the foundation of the concrete of the inner side steel bar truss floor carrier plate during construction.
The following disadvantages exist in the construction mode: 1. the vertical construction joint is required to be reserved at the overhanging part, which affects the structural integrity of the important part, and is not beneficial to the safety, reliability and durability of the structure; 2. the construction period is long, the concrete pouring of the inner side steel bar truss floor support plate is needed, after the concrete strength of the truss floor support plate reaches the design requirement (28 days), the concrete pouring construction of the overhanging part is needed, and the overhanging component can be removed after the concrete strength of the truss floor support plate also reaches the design strength requirement (28 days). The conventional method construction period of the part is at least 56 days, which influences the development of the next working procedure (such as construction of a structural slab layer, construction of an outer wall curtain wall and the like); 3. the cost of labor and materials is high, and the construction period is long, so that the labor operation efficiency and the use cost of machinery and materials are high, and the comprehensive cost is increased.
Disclosure of Invention
In order to solve the problems, the application aims to provide a temporary supporting device of a detachable concrete cantilever structure based on a building steel side beam, and a construction method of the concrete cantilever structure with one-time pouring of inner floor carrier plate concrete and outer cantilever plate concrete.
In order to achieve the above purpose, the present application adopts the technical scheme that:
in a first aspect, the present application provides a temporary support device for a concrete overhanging structure, comprising: a bottom die for setting a concrete template with an overhanging structure; a plurality of upright posts arranged at one side of the bottom die at intervals; the bottom die, the upright posts and the building steel side beams are connected through first connecting pieces; a diagonal draw bar is arranged between the upright post and one side of the bottom die, which is far away from the building steel boundary beam; and a safety protection device is arranged between the upright posts.
In some preferred embodiments, the bottom mold comprises a frame and a bottom plate disposed on an upper surface of the frame.
In some preferred embodiments, diagonal braces are provided between the bottom die and the building steel edge beam.
In some preferred embodiments, a plurality of second connecting pieces are arranged at intervals on one side of the bottom die away from the building steel boundary beam, and the diagonal draw bars are connected with the bottom die through the second connecting pieces.
In some preferred embodiments, the upright post is provided with a plurality of through holes at intervals, and the safety protection device comprises a safety rope penetrating through the through holes with the same level.
In a second aspect, the present application further provides a construction method of a concrete overhanging structure, including:
s1, manufacturing a temporary supporting device semi-finished product; manufacturing a framework of a bottom die, and paving a bottom plate on the upper surface of the framework; one end of the diagonal draw bar is rotationally connected with one side of the bottom die;
s2, constructing a single temporary supporting device; hoisting the temporary supporting device semi-finished product in place for trial assembly, and correcting elevation and flatness; welding the first connecting piece with the bottom die, the building steel side beam and one end of the upright post respectively; after correcting elevation and flatness again, welding the other end of the upright post with one end of the diagonal draw bar;
s3, repeating the steps until all temporary supporting devices in the length direction of the concrete overhanging structure are installed;
s4, setting a safety protection device; the safety rope penetrates through holes with the same horizontal height arranged on the upright post and is fixed;
s5, concrete construction; carrying out a load loading test on the temporary supporting device according to 2 times of the total weight of the structure and the construction load; binding the reinforcing steel bars of the concrete cantilever plate on the upper surface of the bottom plate; sleeving and fixing the first connecting piece by using a PVC protective tube; sequentially pouring the concrete of the floor support plate at the inner side and the concrete of the cantilever plate at the outer side;
s6, ending the concrete construction; when the integral strength of the cantilever plate concrete reaches 75% of the design strength, the first connecting piece and the PVC protective tube are removed, and the reserved holes are poured by micro-expansion concrete; after the concrete pouring surface is finished, performing full-coverage maintenance by using a PE film;
s7, removing the temporary supporting device; and when the integral strength of the cantilever plate concrete reaches 100% of the design strength, the upright post (3) is cut off, and the temporary supporting device is removed.
In some preferred embodiments, the step S2 further includes: a diagonal brace is movably connected between the lower part of the bottom die and the building steel side beam; the step S7 further includes: and dismantling the diagonal brace.
Advantageous effects
1. The temporary supporting device is arranged on the basis of the building steel side beam, adopts a mode of pulling up and supporting down, has reasonable stress and higher safety, and the upper surface of the template is flush with the upper surface of the building steel side beam, so that the one-time pouring of the inner side steel bar truss plate and the outer side steel bar concrete cantilever plate can be realized, the structural integrity is improved, and the safety, the reliability and the durability of the temporary supporting device are better ensured; the size of each component is smaller, the weight is light, the whole device is simple to manufacture and high in utilization rate, the conventional section bar can be adopted for manufacturing, each component is connected in a movable connection mode such as a bolt, the disassembly operation of the template is convenient and quick, and the template can be used in a turnover mode for many times.
2. The construction method saves the construction period, reduces 56 days required by the prior art to 28 days, can remove the template to enter the next procedure, improves the manual operation efficiency, saves the use cost of machinery and materials, and reduces the comprehensive cost; through the through-hole that reserves between the stand sets up safety device, need not to set up solitary protection device and can ensure the safety of facing limit constructor.
Drawings
FIG. 1 is a schematic front view of a temporary support device for a concrete overhanging structure according to a preferred embodiment of the application;
FIG. 2 is a schematic side view of a temporary support device for a concrete cantilever structure according to a preferred embodiment of the present application;
FIG. 3 is a schematic top view of a temporary support device for a concrete cantilever structure according to a preferred embodiment of the present application;
FIG. 4 is a schematic diagram I of a construction method of a concrete cantilever structure according to a preferred embodiment of the present application;
FIG. 5 is a schematic diagram II of a construction method of a concrete cantilever structure according to a preferred embodiment of the present application;
FIG. 6 is a schematic illustration of the relationship of an inboard steel truss plate to an outboard reinforced concrete cantilever plate in accordance with the teachings of the present application;
in the figure: 1. a bottom die; 2. a first connector; 3. a column; 4. a diagonal draw bar; 5. a diagonal brace; 6. a second connector; 7. building steel side beams; 8. a safety device; 9. an inner steel bar truss plate; 10. an outer reinforced concrete cantilever plate; 11. a skeleton; 12. a bottom plate; 13. PVC protective tube; 14. a through hole;
Detailed Description
The present application will be further described with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent. In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Example 1
As shown in fig. 1 to 4, the present embodiment provides a temporary supporting device for a concrete overhanging structure, which includes a bottom die 1 for setting a concrete form of the overhanging structure; a plurality of upright posts 3 arranged at one side of the bottom die 1 at intervals; the bottom die 1, the upright posts 3 and the building steel side beams 7 are connected through first connecting pieces 2; a diagonal draw bar 4 is arranged between the upright post 3 and one side of the bottom die 1, which is far away from the building steel boundary beam 7; a safety protection device 8 is arranged between the upright posts 3. It should be understood that in this embodiment, the connection modes are not explicitly indicated, and all the common movable connection modes, such as bolting, may be adopted. The bottom die 1 is used for bearing overhanging structural concrete to be poured and other side dies arranged according to a construction drawing; because the stress of the bottom die 1 is transferred to the building steel side beam 7, and the upper surface is flush with the upper surface of the building steel side beam 7, the inner side steel bar truss floor supporting plate and the outer side steel bar concrete cantilever plate 10 can be poured simultaneously, the inner side steel bar truss floor supporting plate does not need to be poured first, a vertical construction joint is reserved, and then a template is erected to pour the outer side steel bar concrete cantilever plate 10 for the second time. In some preferred embodiments, for the inner steel truss floor deck and the outer steel concrete cantilever deck to have no abrupt cross-sectional changes, the upper surface of the bottom mold 1 should be flush with the upper surface of the building steel side beam 7. It should be understood that the upright 3, the diagonal draw bars 4 and the bottom die 1 are connected to form a triangular stress structure, wherein the length and the width of the bottom die 1 are determined by the requirement of the building construction drawing on the outer reinforced concrete cantilever plate 10, and a person skilled in the art can determine the specific number and the spacing distance of the first connecting pieces 2, the upright 3 and the diagonal draw bars 4 which are arranged at intervals in the length direction according to the length of the bottom die 1. The shape, size and other specific parameter data of the first connecting piece 2 can be determined by a person skilled in the art according to the actual situation in the field, preferably, the first connecting piece 2 can be made of angle steel, at this time, the lower surface of the length direction of the first connecting piece 2 is respectively connected with the bottom die 1 and the building steel side beam 7, and the upright post is connected with the upper surface of the first connecting piece 2.
In other preferred embodiments, considering that the outer reinforced concrete cantilever plate 10 is generally arranged on the outer vertical surface side of the building, there is a safety hazard during construction, as shown in fig. 4, a safety protection device 8 is arranged between the upright posts 3. Preferably, the upright 3 is provided with a plurality of through holes 14 at intervals, and the safety protection device 8 comprises safety ropes penetrating through the through holes 14 with the same horizontal height, and the safety ropes arranged at intervals in the vertical direction form a simple and effective protection device.
In some preferred embodiments, a specific structural example of the bottom mold 1 is given, and the bottom mold 1 includes a frame 11 and a bottom plate 12 laid on an upper surface of the frame 11. It should be understood that the structural members in the present application may be made of standard profiles commonly used in the building field without separate mold opening and customization, for example, the upright 3 and the framework 11 may be made of hollow rectangular pipes or square pipes, the diagonal members 4 and the first connecting members 2 may be made of angle steel, and the specific specification and model of the adopted profiles may be determined by those skilled in the art according to the specific conditions of the cantilever structure to be constructed. Preferably, the bottom plate 12 is a steel plate with a thickness of 2mm, and the bottom plate 12 and the framework 11 can be welded and fixed in consideration of long-term fixation of the bottom plate 12 on the framework 11 without disassembly. In this embodiment, the bottom die 1 is mainly subjected to the forces of the connecting pieces, the upright 3 and the diagonal braces 4, and in terms of the action mode, mainly the upper pulling force, and in other preferred embodiments, in order to strengthen the stress strength and rigidity of the whole device, it is considered that diagonal braces 5 are arranged between the bottom die 1 and the building steel side beams 7. The diagonal brace 5, the building steel side beam 7 and the bottom die 1 form another triangular stress structure, and mainly bear downward pressure. The diagonal brace 5 is matched with the diagonal brace 4, so that the temporary supporting device of the whole concrete overhanging structure is more stable.
In other preferred embodiments, considering that when the width of the formwork is wider (meaning that the overhanging length of the overhanging board is longer), the operation distance when directly connecting the diagonal draw bar 4 with the bottom die 1 is too far to facilitate the construction of workers, it is considered that a plurality of second connecting pieces 6 are arranged at intervals on one side of the bottom die 1 away from the first connecting pieces 2, and the diagonal draw bar 4 is connected with the bottom die 1 through the second connecting pieces 6.
In other preferred embodiments, considering that the outer reinforced concrete cantilever plate 10 is generally arranged on the outer vertical surface side of the building, there is a safety hazard during construction, as shown in fig. 4, a safety protection device 8 is arranged between the upright posts 3. Preferably, a plurality of through holes are reserved on the upright post 3 at intervals, then the safety ropes are fixed at the end parts after passing through the reserved holes, and the safety ropes arranged at intervals in the vertical direction form a simple and effective protection device.
Example 2
The present embodiment is developed on the basis of the above embodiment 1, and as shown in fig. 5 to 6, the present embodiment provides a construction method of a concrete cantilever structure using the temporary supporting device described in the above embodiment 1:
s1, manufacturing a temporary supporting device semi-finished product; manufacturing a framework 11 of the bottom die 1, and paving a bottom plate 12 on the upper surface of the framework 11; one end of the diagonal draw bar 4 is rotationally connected with one side of the bottom die 1;
specifically, taking 1300mm of cantilever structure length as an example, considering that the manufacturing completion size of a single bottom die 1 is 3000 (length) ×1500 (width) mm, a framework 11 is manufactured by adopting a 50×50×3mm square tube, 2 vertical secondary ribs are uniformly added in the middle of the framework 11 along the length direction, 1 vertical secondary rib is uniformly added in the middle of the framework 11 along the width direction, the materials are 50×50×3mm square tubes, and all connecting points are firmly welded in a full-length manner.
After the framework 11 is manufactured, a 3000 multiplied by 1500 multiplied by 2mm steel plate bottom plate 12 is fully paved on the upper surface of the framework 11, and welded and fixed with the framework 11 after the paving is finished, so that the bottom die 1 is manufactured. In some preferred embodiments, in order to realize the rotary connection between one end of the diagonal draw bar 4 and one side of the bottom die 1, it is considered to select an angle steel L50 x 3mm with a length of 200mm as the second connecting piece 6, fix the angle steel L50 x 3mm with the outer side of the finished bottom die 1, reserve a through hole in the middle of the second connecting piece 6, and serve as a connecting hole between the diagonal draw bar 4 and the second connecting piece 6, where the second connecting piece 6 is arranged and spaced corresponding to the first connecting piece 2. The spacing between adjacent second connectors 6 is 1500mm.
S2, constructing a single temporary supporting device; hoisting the temporary supporting device semi-finished product in place for trial assembly, and correcting elevation and flatness; welding the first connecting piece 2 with the bottom die 1, the building steel side beam 7 and one end of the upright post 3 respectively; after correcting elevation and flatness again, welding the other end of the upright post 3 with one end of the diagonal draw bar 4; in some preferred embodiments, in order to enhance the stress intensity and rigidity of the whole device, it is considered to provide a diagonal brace 5 between the lower part of the bottom die 1 and the building steel side beam 7.
Specifically, taking 1300mm of the cantilever structure as an example, the first connecting pieces 2 are made of L50×50×3mm angle steel with the length of 180mm, and the distance between adjacent first connecting pieces 2 is 1500mm. After the upper part of the bottom die 1 is firmly fixed, the diagonal brace 5 is manufactured and fixed. The diagonal brace 5 can be divided into an inner diagonal brace 5 and an outer diagonal brace 5, and is made of L50X 3mm angle steel, and respectively supports the intersection points of the longitudinal and transverse secondary ribs at the middle part and the outer part of the framework 11. One end of the double-nut anti-slip screw is connected with the bottom die 1, the other end of the double-nut anti-slip screw is connected with holes reserved in a steel beam web plate and a lower flange plate in advance through a steel plate with the thickness of 10mm and the length of 100mm and the width of 80mm, and the bolt spacing is equal to the spacing of the diagonal brace 5. According to design rechecking calculation, the diameter of the bolt opening is preferably less than or equal to 20mm, and the arrangement of the intervals does not affect the safety of the steel beam structure.
S3, repeating the steps until all temporary supporting devices in the length direction of the concrete overhanging structure are installed;
s4, setting a safety protection device (8); in other preferred embodiments, it is considered that the outer reinforced concrete cantilever plates 10 are generally arranged on the outer facade side of the building, and there is a safety risk during construction, so that safety devices 8 are arranged between the upright posts 3 when all temporary supporting devices are installed. Preferably, the safety rope penetrates through the through holes 14 with the same level arranged on the upright post 3 and is fixed.
S5, concrete construction; carrying out a load loading test on the temporary supporting device according to 2 times of the total weight of the structure and the construction load; binding the reinforcing steel bars of the concrete cantilever plate on the upper surface of the bottom plate 12; the first connecting piece 2 is sleeved and fixed by the PVC protective tube 13, and obviously, the height of the PVC protective tube 13 is larger than the thickness of the concrete to be poured, as shown in fig. 5; sequentially pouring the concrete of the floor support plate at the inner side and the concrete of the cantilever plate at the outer side;
it should be understood that the building types of the conventional inner side steel bar truss building supporting plate and the conventional outer side steel bar concrete cantilever plate are analyzed from the stress condition of the truss building supporting plate, the cantilever part steel bars are reserved, the inner side steel bar truss building supporting plate is poured in advance, and after the truss building supporting plate concrete strength reaches the design requirement (28 days), the cantilever part concrete pouring construction is performed. The technical scheme of the application can achieve the purpose of pouring the concrete on the inner side and the outer side together. Only the concrete at the horizontal connection part of the reserved PVC protective tube 13 part is needed to be reserved.
S6, ending the concrete construction; when the integral strength of the cantilever plate concrete reaches 75% of the design strength, the first connecting piece 2 and the PVC protective tube 13 are removed, and the reserved holes are poured by micro-expansion concrete; after the concrete pouring surface is finished, performing full-coverage maintenance by using a PE film; it should be appreciated that the micro-expansive concrete poured in the cavity may be one level higher than the concrete previously integrally poured.
S7, removing the temporary supporting device; when the integral strength of the cantilever plate concrete reaches 100% of the design strength, the exposed part of the upright post 3 is cut off, and if the cantilever plate concrete comprises the diagonal brace 5, the diagonal brace 5 is required to be dismantled, so that the temporary supporting device is dismantled. It should be understood that the temporary support device of the removed concrete overhanging structure should be cleaned, maintained and placed at a designated location for easy turnover.
The foregoing has shown and described the basic principles, principal features and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made without departing from the spirit and scope of the application, which is defined in the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.
Claims (7)
1. A temporary support device for a concrete cantilever structure, comprising:
a bottom die (1) for setting a concrete template with an overhanging structure; a plurality of upright posts (3) arranged at one side of the bottom die (1) at intervals; the bottom die (1), the upright posts (3) and the building steel side beams (7) are connected through first connecting pieces (2); a diagonal draw bar (4) is arranged between the upright post (3) and one side of the bottom die (1) far away from the building steel side beam (7); safety protection devices (8) are arranged between the upright posts (3).
2. The temporary support device for a concrete cantilever structure according to claim 1, wherein: the bottom die (1) comprises a framework (11) and a bottom plate (12) paved on the upper surface of the framework (11).
3. The temporary support device for a concrete cantilever structure according to claim 1, wherein: an inclined stay bar (5) is arranged between the bottom die (1) and the building steel side beam (7).
4. The temporary support device for a concrete cantilever structure according to claim 1, wherein: one side of the bottom die (1) far away from the building steel boundary beam (7) is provided with a plurality of second connecting pieces (6) at intervals, and the diagonal draw bar (4) is connected with the bottom die (1) through the second connecting pieces (6).
5. The temporary support device for a concrete cantilever structure according to claim 1, wherein: a plurality of through holes (14) are formed in the upright post (3) at intervals, and the safety protection device (8) comprises a safety rope penetrating through the through holes (14) with the same horizontal height.
6. The construction method of the concrete overhanging structure is characterized by comprising the following steps of:
s1, manufacturing a temporary supporting device semi-finished product; manufacturing a framework (11) of the bottom die (1), and paving a bottom plate (12) on the upper surface of the framework (11); one end of the diagonal draw bar (4) is rotationally connected with one side of the bottom die (1);
s2, constructing a single temporary supporting device; hoisting the temporary supporting device semi-finished product in place for trial assembly, and correcting elevation and flatness; welding the first connecting piece (2) with the bottom die (1), the building steel side beam (7) and one end of the upright post (3) respectively; after correcting elevation and flatness again, welding the other end of the upright post (3) with one end of the diagonal draw bar (4);
s3, repeating the steps until all temporary supporting devices in the length direction of the concrete overhanging structure are installed;
s4, setting a safety protection device (8); the safety rope penetrates through the through holes (14) with the same horizontal height arranged on the upright post (3) and is fixed;
s5, concrete construction; carrying out a load loading test on the temporary supporting device according to 2 times of the total weight of the structure and the construction load; binding the reinforcing steel bars of the concrete cantilever plate on the upper surface of the bottom plate (12); sleeving and fixing the first connecting piece (2) by using a PVC protective tube (13); sequentially pouring the concrete of the floor support plate at the inner side and the concrete of the cantilever plate at the outer side;
s6, ending the concrete construction; when the integral strength of the cantilever plate concrete reaches 75% of the design strength, the first connecting piece (2) and the PVC protective tube (13) are removed, and the reserved holes are poured by micro-expansion concrete; after the concrete pouring surface is finished, performing full-coverage maintenance by using a PE film;
s7, removing the temporary supporting device; and when the integral strength of the cantilever plate concrete reaches 100% of the design strength, the upright post (3) is cut off, and the temporary supporting device is removed.
7. The method for constructing a concrete cantilever structure according to claim 6, wherein the step S2 further comprises: an inclined strut (5) is movably connected between the lower part of the bottom die (1) and a building steel side beam (7); the step S7 further includes: and dismantling the diagonal brace (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310262657.4A CN116591468A (en) | 2023-03-17 | 2023-03-17 | Temporary supporting device of concrete overhanging structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310262657.4A CN116591468A (en) | 2023-03-17 | 2023-03-17 | Temporary supporting device of concrete overhanging structure and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116591468A true CN116591468A (en) | 2023-08-15 |
Family
ID=87605067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310262657.4A Pending CN116591468A (en) | 2023-03-17 | 2023-03-17 | Temporary supporting device of concrete overhanging structure and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116591468A (en) |
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2023
- 2023-03-17 CN CN202310262657.4A patent/CN116591468A/en active Pending
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