CN215594920U - Back-jacking type overhanging structure formwork supporting system - Google Patents
Back-jacking type overhanging structure formwork supporting system Download PDFInfo
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- CN215594920U CN215594920U CN202120972293.5U CN202120972293U CN215594920U CN 215594920 U CN215594920 U CN 215594920U CN 202120972293 U CN202120972293 U CN 202120972293U CN 215594920 U CN215594920 U CN 215594920U
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Abstract
The utility model relates to the technical field of buildings, and discloses a back-jacking type overhanging structure formwork supporting system which comprises a supporting platform, a back jacking piece and a cable-stayed assembly; the supporting platform comprises a plurality of main beams and coupling beams; the back-up piece comprises a vertical column; the lower end of the upright post is connected with the descending plate, and the upper end of the upright post is connected with the main beam; the oblique pulling component comprises a pull rod and a connecting steel plate. The utility model has the beneficial effects that: the supporting platform formed by connecting the main beams and the coupling beams reduces the size of the main beams, lightens the weight of a single main beam, and shortens the overhanging length of the main beam by arranging the ejecting piece on the descending plate to eject the supporting platform, and is matched with the inclined pulling assembly, so that the strength, the rigidity and the stability of the supporting platform are excellent, the deflection deformation is small, and the pouring forming quality of the overhanging concrete beam plate structure is good.
Description
Technical Field
The utility model relates to the technical field of buildings, in particular to a back-jacking cantilever structure formwork supporting system.
Background
The house building engineering often meets the large cantilever concrete beam plate structure, and the deflection deformation control of the cantilever structure is strict, and in order to control the deflection of the concrete structure within an allowable range, large-section I-shaped steel needs to be selected as a stressed main beam of the cantilever structure, and the weight of a single main beam is large. For example, the cantilever beam plate with the cantilever length of 3m is calculated, the I-steel of the cantilever beam needs to be 28# or more, the weight of the 28# I-steel per meter is 43.4Kg, the weight of the 10 meter is 434Kg, an adult can generally carry 50Kg, namely, 9 persons are required to carry 10 meters of the 28# I-steel, the work efficiency is low, and the actual operation difficulty is high. It is summarized that the traditional cantilever beam plate supporting system has the following obvious defects:
(1) the single component has large cross-sectional dimension and heavy weight. In order to meet the stress calculation, the girder of the traditional cantilever beam plate structure supporting system has to adopt I-shaped steel with a large-section girder to meet the requirements of strength, rigidity and stability of the supporting system, and has the advantages of large weight, difficult installation and low construction efficiency.
(2) The construction of the lower brace diagonal rod is dangerous and difficult. In order to meet the requirements of strength, rigidity and stability of a supporting system, an inclined strut rod piece needs to be arranged at the overhanging part, a worker needs to bend down to operate the lower inclined strut rod piece in the welding process, the operation surface is limited, and the high-altitude falling risk is increased.
(3) The steel plate is fixed on the side of the structural side beam through split bolts, so that the construction difficulty is high. The drilling machine is adopted to drill holes at the corresponding positions of the beam sides, the opposite-pulling bolts penetrate through the upper and lower fixed lateral steel plates of the floor slab, workers on the upper floor and the lower floor need to operate simultaneously, the high falling risk is increased, the labor force is increased, and the work efficiency is low.
(4) The overhanging section has no upright post for back jacking, and the overhanging length is long. In the structural form that the descending plate exists at the periphery of the floor structure (the outer side of the structural side beam), the cantilever beam plate has longer cantilever length, the total length of the girder I-steel corresponding to the support system is long, the deflection deformation is large, and the support effect is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the overhanging support system erected when the overhanging concrete beam plate structure is planned to be constructed on the upper floor of a structure boundary beam due to the existence of a descending plate outside the structure boundary beam is difficult to meet the construction load requirement due to overlong overhanging length, and provides a back-jacking type overhanging structure formwork support system which comprises a support platform, a back jacking piece and a cable-stayed assembly;
the supporting platform comprises a plurality of main beams and coupling beams; one end of the main beam is connected with the structural plate, the other end of the main beam is an overhanging end, and the coupling beams are connected with the overhanging end of the main beam;
the back-up piece comprises a vertical column; the lower end of the upright post is connected with the descending plate, and the upper end of the upright post is connected with the overhanging end of the main beam;
the cable-stayed assembly comprises a pull rod and a connecting steel plate; the lower end of the pull rod is fixedly connected with the supporting platform, and the upper end of the pull rod is connected with the structural boundary beam of the upper layer of structural slab through the connecting steel plate.
Further, the jacking piece also comprises a cushion layer arranged between the upright post and the descending plate. The falling plate can be protected by the cushion layer, the contact area can be increased, and the upper end of the falling plate is prevented from being damaged by pressure.
Further, the cushion layer is made of wood.
Further, the support platform further comprises an anchor ring; the main beam is fixedly connected with the structural slab through one or more anchor rings; the lower end of the anchor ring is embedded in the structural slab. The anchor ring can be a U-shaped anchor ring, can be well connected and fixed with the main beam and the structural slab, and can realize the quick installation and the disassembly of the main beam.
Further, the supporting platform further comprises a plurality of positioning ribs vertically arranged at the upper end of the coupling beam. The positioning ribs are used for positioning the steel pipes of the formwork support frame, so that the horizontal sliding of the formwork support frame is avoided, and the fixing effect of the formwork support frame is ensured.
Furthermore, the connecting steel plate is welded with the pull rod, and the connecting steel plate is connected with the structural edge beam of the upper layer of structural plate through a connecting bolt. The pull rod is connected with the structural boundary beam of the upper layer of structural slab through the connecting steel plate, so that the fixing construction of the pull rod is facilitated.
Further, the connecting steel plate is an L-shaped steel plate, and the thickness of the connecting steel plate is greater than or equal to 12 mm.
Furthermore, the lower end of the pull rod is welded and fixed with the upper end of the main beam.
Furthermore, the main beam, the coupling beam and the upright post are all I-shaped steel.
Furthermore, five main beams are arranged horizontally and at intervals; the number of the connecting beams is three; three the antithetical couplet roof beam level and interval set up in five the upper end of girder, the girder with the antithetical couplet roof beam is perpendicular.
The utility model has the beneficial effects that: the supporting platform formed by connecting the main beams and the coupling beams reduces the size of the main beams, lightens the weight of a single main beam, is convenient for construction of a formwork supporting frame, and can provide stable and effective support for construction of a cantilever concrete beam plate structure. The back-jacking piece is arranged on the descending plate to back-jack the supporting platform, so that the cantilever length of the main beam is shortened, and the supporting platform is matched with the diagonal pulling assembly, so that the strength, rigidity and stability of the supporting platform are excellent, the deflection deformation is small, and the pouring forming quality of the cantilever concrete beam plate structure is good.
Drawings
Fig. 1 is a schematic perspective view of the formwork support system of the back-jacking type cantilever structure of the present invention.
Fig. 2 is a schematic view of the structure of fig. 1 with the upper structural plate removed.
Fig. 3 is a schematic front view of the structure of fig. 1.
Fig. 4 is an enlarged perspective view of one of the connection steel plates of fig. 1.
Fig. 5 is an enlarged perspective view of one of the anchor rings of fig. 1.
In the drawings, 1-main beam; 2-connecting the beams; 3-an anchor ring; 3.1-pressing the steel plate; 4-positioning ribs; 5-upright column; 6-cushion layer; 7-a pull rod; 8-connecting steel plates; 9-connecting bolts; 10-structural panels; 11-a layer of structural plate is arranged on the upper layer; 12-structural edge beams; 13-descending plate.
Detailed Description
The utility model is described in further detail below with reference to the figures and specific embodiments.
The formwork support system of the back-jacking type overhanging structure shown in fig. 1 to 5 comprises a support platform, a back-jacking piece and a diagonal pulling assembly.
As shown in fig. 1 and 2, the supporting platform comprises five main beams 1, three coupling beams 2, a plurality of anchor rings 3 and positioning ribs 4; the five main beams 1 are horizontally arranged at intervals, the three connecting beams 2 are horizontally welded at the upper ends of the five main beams 1 at intervals, and the main beams 1 are vertical to the connecting beams 2; one part of the main beam 1 is a fixed section which is connected with the structural plate 10; the other part of girder 1 is the section of encorbelmenting, and the end of the section of should encorbelmenting is for encorbelmenting the end, and the section of encorbelmenting of girder 1 is all located to three yoke 2 of this embodiment. The fixed section of each main beam 1 is fixedly connected with the structural plate 10 through three spaced anchor rings 3; the lower end of the anchor ring 3 is pre-embedded in the structural plate 10. The anchor ring 3 in this embodiment is a U-shaped anchor ring 3, the arc portion at the lower end of which is embedded in the structural plate 10, and the vertical portion at the upper end of which is located at both sides of the main beam 1, and is provided with a compression steel plate 3.1 and bolts to fix the main beam 1. Three anchor ring 3 on same root girder 1 is in same axis direction to girder 1's installation, for example, adopt small-size hoisting equipment to hoist many girders 1 earlier on structural slab 10, follow anchor ring 3 array orientation again and promote girder 1 outwards, make girder 1's canned paragraph be in anchor ring 3, girder 1's the section of encorbelmenting is outside structure boundary beam 12.
The upper end of every yoke beam 2 is erect and is equipped with five location muscle 4, and the quantity and the position of location muscle 4 are decided according to the quantity and the position of template support frame's steel pipe, and template support frame is full hall frame for current conventional steel pipe, makes the lower pot head of partial steel pipe on location muscle 4 when full hall frame is established to can restrict full hall frame's horizontal displacement, guarantee template support frame's stability then.
The back-jacking piece comprises a vertical column 5 and a cushion layer 6; the cushion layer 6 is preferably made of battens and arranged at the upper end of the descending plate 13, and during specific construction, the battens are placed at the upper end of the descending plate 13 after the concrete strength of the descending plate 13 reaches 80% of the design strength. And then the upright post 5 is vertically placed on the batten, and the upper end of the upright post 5 is welded and fixed with the main beam 1 outside the structural boundary beam 12, so that the main beam 1 is supported by jacking.
The diagonal pulling assembly comprises a pull rod 7 and a connecting steel plate 8; the pull rod 7 is preferably a square steel pipe, the lower end of the pull rod 7 is fixedly connected with the supporting platform, specifically, the lower end of the pull rod 7 is fixedly welded with the upper end of the main beam 1, and the upper end of the pull rod 7 is connected with the structural boundary beam 12 of the upper layer of structural slab 11 through the connecting steel plate 8. As shown in fig. 4, the connecting steel plate 8 is an L-shaped steel plate including a horizontal plate and a vertical plate, and has a plate thickness of 12 mm or more; the horizontal plate of the connecting steel plate 8 is connected with the structural edge beam 12 of the upper layer of structural plate 11 through the connecting bolt 9, and the vertical plate of the connecting steel plate 8 is welded with the upper end of the pull rod 7. When the cable-stayed assembly is constructed, firstly, a steel plate is laid on a supporting platform to serve as a construction platform of the cable-stayed assembly, so that the pull rod 7 and the main beam 1 can be conveniently welded; the installation of the connecting steel plate 8 and the welding of the connecting steel plate 8 and the pull rod 7 are directly constructed on the upper layer of the structural plate 11.
The main beam 1, the coupling beam 2 and the upright post 5 of the embodiment are all I-steel.
The construction steps of the support system of the embodiment are as follows:
the method comprises the following steps: the method comprises the steps of determining the position of an anchor ring 3 according to the position to be set of a main beam 1, pre-burying the anchor ring 3, and pouring concrete to form a structural slab 10, a structural boundary beam 12 and a drop slab 13 of the layer.
Step two: after the concrete strength of the falling plate 13 reaches 80% of the design strength, the batten is placed at the upper end of the falling plate 13.
Step three: the main beam 1 is fixed through the anchor ring 3, and the coupling beam 2 is welded at the overhanging section of the main beam 1.
Step four: and an upright post 5 is welded between the main beam 1 and the batten.
Step five: installing a cable-stayed assembly: laying a steel plate on the supporting platform to form a construction platform, and finishing the welding operation of the lower end of the pull rod 7 and the main beam 1 on the construction platform; and a connecting steel plate 8 is arranged on the structural edge beam 12 of the upper layer of structural plate 11, and the pull rod 7 and the connecting steel plate 8 are welded and fixed.
Step six: and a formwork support frame (namely a steel pipe full frame) is arranged on the support platform, so that a part of steel pipes of the formwork support frame are sleeved on the positioning ribs 4.
Step seven: the upper end of the formwork support frame is provided with a formwork of the cantilever concrete beam plate structure and concrete is poured to form the cantilever concrete beam plate structure.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may be made by those skilled in the art without departing from the principle of the utility model.
Claims (10)
1. The utility model provides a structure template support system encorbelments of back top formula which characterized in that: comprises a supporting platform, a back-jacking piece and a diagonal pulling assembly;
the supporting platform comprises a plurality of main beams and coupling beams; one end of the main beam is connected with the structural plate, the other end of the main beam is an overhanging end, and the coupling beams are connected with the overhanging end of the main beam;
the back-up piece comprises a vertical column; the lower end of the upright post is connected with the descending plate, and the upper end of the upright post is connected with the overhanging end of the main beam;
the cable-stayed assembly comprises a pull rod and a connecting steel plate; the lower end of the pull rod is fixedly connected with the supporting platform, and the upper end of the pull rod is connected with the structural boundary beam of the upper layer of structural slab through the connecting steel plate.
2. The inverted cantilever structural formwork support system of claim 1, wherein: the back-jacking piece also comprises a cushion layer arranged between the upright post and the falling plate.
3. The inverted cantilever structural formwork support system of claim 2, wherein: the cushion layer is made of battens.
4. The inverted cantilever structural formwork support system of claim 1, wherein: the support platform further comprises an anchor ring; the main beam is fixedly connected with the structural slab through one or more anchor rings; the lower end of the anchor ring is embedded in the structural slab.
5. The inverted cantilever structural formwork support system of claim 1, wherein: the supporting platform further comprises a plurality of positioning ribs vertically arranged at the upper end of the coupling beam.
6. The inverted cantilever structural formwork support system of claim 1, wherein: the connecting steel plate is welded with the pull rod, and the connecting steel plate is connected with the structural edge beam of the upper layer of structural plate through a connecting bolt.
7. The inverted cantilever structural formwork support system of claim 6, wherein: the connecting steel plate is an L-shaped steel plate, and the thickness of the connecting steel plate is greater than or equal to 12 mm.
8. The inverted cantilever structural formwork support system of claim 1, wherein: the lower end of the pull rod is fixedly welded with the upper end of the main beam.
9. The inverted cantilever structural formwork support system of claim 2, wherein: the main beam, the coupling beam and the upright post are all I-shaped steel.
10. The inverted cantilever structural formwork support system of claim 1, wherein: the number of the main beams is five, and the five main beams are arranged horizontally and at intervals; the number of the connecting beams is three; three the antithetical couplet roof beam level and interval set up in five the upper end of girder, the girder with the antithetical couplet roof beam is perpendicular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120972293.5U CN215594920U (en) | 2021-05-08 | 2021-05-08 | Back-jacking type overhanging structure formwork supporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120972293.5U CN215594920U (en) | 2021-05-08 | 2021-05-08 | Back-jacking type overhanging structure formwork supporting system |
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| Publication Number | Publication Date |
|---|---|
| CN215594920U true CN215594920U (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120972293.5U Active CN215594920U (en) | 2021-05-08 | 2021-05-08 | Back-jacking type overhanging structure formwork supporting system |
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| CN (1) | CN215594920U (en) |
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2021
- 2021-05-08 CN CN202120972293.5U patent/CN215594920U/en active Active
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