CN212927033U - Formwork support frame for large-span post-tensioned prestressed beam haunch structure - Google Patents
Formwork support frame for large-span post-tensioned prestressed beam haunch structure Download PDFInfo
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- CN212927033U CN212927033U CN202021660443.0U CN202021660443U CN212927033U CN 212927033 U CN212927033 U CN 212927033U CN 202021660443 U CN202021660443 U CN 202021660443U CN 212927033 U CN212927033 U CN 212927033U
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Abstract
The utility model provides a formwork support frame that is used for large-span post-tensioned prestressed beam to add armpit structure, it includes: a support frame body; the template support frame is positioned above the support frame body and comprises a first support frame for supporting the main template of the beam main body and a second support frame for supporting the haunched structure template of the beam; the formwork support frame and the support frame body are provided with a plurality of fixing points in a rectangular array, and the fixing points are fixed through reinforcing steel bars; the first support frame is rectangular; the second support frame is rectangular, a groove is formed in the top end of the second support frame, the shape of the groove is matched with that of the haunching structure, and a reinforcing mesh is arranged on the inner side face of the groove. The utility model provides a formwork support frame that is used for large-span post-tensioned prestressed roof beam to add armpit structure, according to the different formwork support frame that adds the armpit structural design, it puts into support frame body top to put, can carry out fine support to the dead weight and the construction load of prestressed roof beam, and stability is strong.
Description
Technical Field
The utility model belongs to the building field especially relates to a formwork support frame that is used for large-span post-tensioned prestressed beam to add armpit structure.
Background
Along with the vigorous development of the domestic high and new technology industry and the logistics industry, public buildings, commercial office buildings and factory buildings have high requirements on the aspects of large span, large space, high building floors and the like, the requirement can be well met by adopting a large-span post-tensioned prestressed structure, the problems of crack resistance, deflection and the like of large span can be solved, a column network can be expanded, the large space is formed, and the use function of the building is improved.
Under heavy load, the prestressed tendons in the large-span post-tensioned prestressed frame beam are more and beam column joints can be eccentrically stressed, then the frame beam can be subjected to haunch design through the prestressed tendons, even partial non-prestressed tendons are arranged in the haunch area, so that the operation of constructors is convenient, the working efficiency is improved, the effect of balancing the stress is achieved, and the large-span post-tensioned prestressed frame beam has obvious social and economic benefits.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a formwork support frame that is used for large-span post-tensioned prestressed beam haunches structure to provide at least advantage that will explain later.
Another object of the utility model is to provide a formwork support frame that is used for large-span post-tensioned prestressed roof beam to add armpit structure, according to the different formwork support frame that adds the armpit structural design, it puts into support frame body top to put, can carry out fine support to the dead weight and the construction load of prestressed roof beam, and stability is strong.
The technical scheme of the utility model as follows:
a formwork support frame for a large-span post-tensioned prestressed beam haunch structure, comprising:
a support frame body;
the template support frame is positioned above the support frame body and comprises a first support frame for supporting the main template of the beam main body and a second support frame for supporting the haunched structure template of the beam;
wherein the content of the first and second substances,
the formwork support frame and the support frame body are provided with a plurality of fixing points in a rectangular array, and the fixing points are fixed through reinforcing steel bars;
the first support frame is rectangular;
the second support frame is rectangular, a groove is formed in the top end of the second support frame, the shape of the groove is matched with that of the haunching structure, and a reinforcing mesh is arranged on the inner side face of the groove.
Preferably, in the formwork support frame for the large-span post-tensioned prestressed beam haunching mechanism,
the adjacent side surfaces of the first support frame and the second support frame are welded;
the bottom end face of the second support frame is provided with a horizontal support plate, the left side and the right side of the horizontal support plate extend out to form a wing plate, and a plurality of first connecting holes are formed in the wing plate;
a plurality of second connecting holes are formed in the edges of the left side and the right side of the bottom end face of the first support frame;
the first support frame and the second support frame are fixedly connected through the first connecting hole and the second connecting hole by the connecting piece.
Preferably, in the formwork support frame for the large-span post-tensioned prestressed beam haunched structure,
the outer side surfaces of the first support frame and the second support frame are provided with a left oblique fixing rod and a right oblique fixing rod;
the left oblique fixing rod and the right oblique fixing rod extend downwards to the outer side face of the support frame body and are welded with the support frame body.
Preferably, in the formwork support frame for a large-span post-tensioned prestressed beam haunched structure, the support frame body includes:
the upright stanchion is fixed on a plane supporting plate;
the horizontal rod is connected with the vertical rod, and the length of the horizontal rod extending to the adjacent plate lower support system is not less than that of the vertical rod;
and the vertical cross braces are continuously erected on the intersection points of the vertical rods and the horizontal rods from bottom to top.
Preferably, in the formwork support frame for the large-span post-tensioned prestressed beam haunched structure, the lap joint length of the vertical cross braces is 1m, the vertical cross braces are fixed by adopting 3 rotary fasteners, and the distance from the edge of the cover plate of the end fastener to the end of each vertical cross brace is not less than 10 cm.
The utility model discloses following beneficial effect has:
different formwork support frames are designed according to different haunching structures and are arranged above the support frame body, so that the self weight and the construction load of the prestressed beam can be well supported;
the template support frame adopts a fixing mode of rectangular array fixing points and reinforcing steel bars, so that the stability is strong and dislocation is avoided;
the second support frame is provided with a groove matched with the shape of the haunching structure, and the inner side face of the second support frame is provided with a reinforcing mesh, so that the second support frame can play a powerful supporting role on the haunching structure part.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is the structural schematic diagram of an embodiment of the formwork support frame for a large-span post-tensioned prestressed beam haunching mechanism provided by the utility model.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1, the utility model provides a formwork support frame that is used for large-span post-tensioned prestressed beam to add armpit structure, it includes:
a support frame body 1;
the template support frame is positioned above the support frame body 1 and comprises a first support frame 2 for supporting the main template of the beam main body and a second support frame 3 for supporting the haunched structure template of the beam;
wherein the content of the first and second substances,
the formwork support frame and the support frame body 1 are provided with a plurality of fixing points in a rectangular array, and the fixing points are fixed through reinforcing steel bars;
the first support frame 2 is rectangular;
the second support frame 3 is rectangular, a groove is formed in the top end of the second support frame, the shape of the groove is matched with that of the haunching structure, and a reinforcing mesh is arranged on the inner side face of the groove.
In order to enhance the integrity of the formwork support frame, the utility model provides an embodiment of the formwork support frame for the large-span post-tensioned prestressed beam haunching mechanism,
the adjacent side surfaces of the first support frame 2 and the second support frame 3 are welded;
the bottom end face of the second support frame 3 is provided with a horizontal support plate 5, the left side and the right side of the horizontal support plate extend out to form a wing plate, and a plurality of first connecting holes are formed in the wing plate;
a plurality of second connecting holes are formed in the edges of the left side and the right side of the bottom end face of the first support frame 2;
the connecting piece connects and fixes the first support frame 2 and the second support frame 3 through the first connecting hole and the second connecting hole.
In order to improve the stability of the whole support frame, in one embodiment of the formwork support frame for the large-span post-tensioned prestressed beam haunching mechanism provided by the utility model,
the outer side surfaces of the first support frame 2 and the second support frame 3 are provided with a left inclined fixed rod 5 and a right inclined fixed rod 6;
the left oblique fixing rod 5 and the right oblique fixing rod 6 extend downwards to the outer side face of the support frame body 1 and are welded with the support frame body 1.
The utility model provides an in an embodiment of a formwork support frame for large-span post-tensioned prestressed beam haunches mechanism, support frame body 1 includes:
the upright stanchion is fixed on a plane supporting plate;
the horizontal rod is connected with the vertical rod, and the length of the horizontal rod extending to the adjacent plate lower support system is not less than that of the vertical rod;
and the vertical cross braces are continuously erected on the intersection points of the vertical rods and the horizontal rods from bottom to top.
The structure is basically the same as the structure of the existing support frame, and the main structure of the first support frame and the second support frame is the same, so that the detailed description of the specific structure is not needed, and the person skilled in the art can easily know how to construct the support frame.
The utility model provides an in an embodiment of a formwork support frame that is used for large-span post-tensioned prestressed beam to add armpit mechanism, the overlap joint length of vertical bridging is 1m, adopts 3 rotatory fasteners fixed, wherein the edge of tip fastener apron arrives the end distance of vertical bridging is not less than 10 cm.
After calculation is carried out according to engineering design load, a steel pipe scaffold system or a support system such as a coil buckling frame and a wheel buckling frame can be adopted. The prestressed beam can not bear any external load before the prestressed tendon is tensioned, and the self weight and the construction load of the prestressed beam are all born by the formwork support frame. Therefore, in the process of erecting the formwork support frame, the foundation, the material, the spacing, the support, the connection, the protection, the bearing, the paving, the upper and lower channels, the acceptance and the like are strictly processed.
The construction of the support frame body comprises:
vertical rod
(1) The vertical rods are supported on a solid foundation, and in order to ensure the stability of the supporting system, when the ultrahigh part formwork support is erected, the supporting system corresponding to the lower floor slab is not detached; the upper layer upright stanchion is aligned with the lower layer, and the scaffold board is laid under the ultrahigh part upright stanchion to diffuse the upper load.
The extension length of the adjustable screw thread of the jacking support is within the range of 0-300 mm. The first vertical rod of the support system is started to be erected 300mm away from the wall and the beam edge.
(2) The formwork support must be provided with longitudinal and transverse floor sweeping rods.
Horizontal rod
Because the step pitch of the horizontal rods of the lower beam support system is smaller than that of the top plate support system, the horizontal rods under the beams extend to the length of the lower adjacent plate support system which is not smaller than the length of one vertical rod and are connected with the vertical rods; when the height of the support frame is the same, the support frame under the plate serves as a beam horizontal rod through the beam, so that the whole support frame is connected into a whole.
Scissor support
Vertical bridging is set up by supreme succession down, and the overlap joint is adopted in the extension, and overlap joint length is 1m, adopts 3 rotatory fasteners fixed, and wherein the edge of tip fastener apron is not less than 10cm to the rod end distance.
The template installation includes:
roof form mounting
(1) And (4) pre-planing and flattening the keel, discharging a top plate marking line, and discharging a vertical rod position line, wherein the vertical rod position corresponds to the lower-layer steel pipe.
(2) And (3) mounting upright rods, cross rods and cross braces from one side according to the determined spacing of the support systems, and placing top supports on the upright rods around the top plate.
(3) When the support is erected, the height of the jacking is adjusted, a 100X 100 full-length main keel (or a 48X 3.0 scaffold tube) is placed, the main keel needs to be firmly lapped, and the flatness is roughly adjusted; the secondary keel adopts 50 x 100 battens, and the primary keel and the secondary keel are fixed by round nails, so that the battens are not loosened.
(4) After the primary and secondary keels are installed, the pull wires are used for adjusting the height and the flatness, and if one side or a plurality of sides lean against a concrete wall, the secondary keels are attached to the wall surface and prop against the wall body or a beam side mold.
(5) Before the template is installed, the inner side surface of the template is brushed with a separant, and after the template is dried, the template is assembled and installed. When the span of the beam slab is more than 4 meters, the bottom die of the beam slab and the bottom die of the slab arch according to the specification, and the arch-arching height is 3 per mill of the net span of the beam slab.
Beam formwork installation
(1) According to the beam width, firstly putting the position line of the upright stanchion, erecting the upright stanchion and the vertical and horizontal rods according to the space requirement, wherein the horizontal rods are required to be connected with the top plate support system into a whole in a pulling way;
(2) lay the roof beam bottom main joist, ann places the secondary joist, and the roof beam bottom formwork adopts the thick tectorial membrane multiply wood of 15mm, and the cleaning gap is kept somewhere at roof beam bottom formwork middle part, treats the shutoff before the concrete placement.
(3) And binding the beam steel bars according to a steel bar binding scheme after the beam bottom template is qualified by inspection, and filling a steel bar protective layer cushion block.
(4) And (3) mounting a beam side formwork, wherein a laminated plate with the thickness of 15mm is used as a beam side formwork panel, a secondary keel is mounted, and a phi 48 multiplied by 3.0 double steel pipe is used as a main keel.
(5) The number of the split bolts is determined according to the height of the beam, the split bolts are placed according to the distance requirement, and the fixed split bolts are well supported with the inclined struts and firmly fixed with the supporting system.
Construction of template at haunch
(1) The joints of the multilayer boards are planed straight by a hand plane, and the top plate template is paved by a hard edge joint method.
(2) The template seam should be tight, avoid handling not in place, cause the wrong platform, influence the impression.
(3) And drilling and opening holes at the positions where the prestressed tendons are reserved by using a hole drilling machine.
The removal of the formwork includes:
(1) the prestressed beam side template can be disassembled under the condition that the strength of concrete can ensure that the surface and edges and corners of the prestressed beam side template are not damaged by disassembling the template; the bottom die and the support of the prestressed structure must be completed by tensioning the prestressed tendons, and the hole channels can be disassembled after grouting.
(2) The horizontal pull rod and the cross brace of the bracket part are firstly removed for operation. And then removing the square timber at the connecting angle of the beam and the floor slab template and the beam side template so as to disconnect the two adjacent templates.
(3) After the prop is supported downwards, the template is slightly pried by using a steel chisel or slightly tapped by using a wooden hammer, the first block is disassembled, and then the first block is disassembled section by section. Steel chisel or hammer can not be used for cutting to fiercely strike the pry. When each template is detached, the template is manually supported and placed on the ground, and a proper amount of scaffold boards are erected on the original supports to support the detached templates. The detached formwork is strictly prohibited from freely falling to the ground.
(4) The method of removing the beam bottom form is substantially the same as the floor form. When the beam bottom formwork with larger span is dismantled, the supports are lowered from the middle of the span, then the supports are lowered toward two ends one by one, and then the subsequent operation is carried out. When the beam bottom mould supporting column is removed, the operation is also carried out from the midspan to the two ends.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (5)
1. A formwork support frame that is used for large-span post-tensioned prestressed beam to add armpit structure, its characterized in that includes:
a support frame body;
the template support frame is positioned above the support frame body and comprises a first support frame for supporting the main template of the beam main body and a second support frame for supporting the haunched structure template of the beam;
wherein the content of the first and second substances,
the formwork support frame and the support frame body are provided with a plurality of fixing points in a rectangular array, and the fixing points are fixed through reinforcing steel bars;
the first support frame is rectangular;
the second support frame is rectangular, a groove is formed in the top end of the second support frame, the shape of the groove is matched with that of the haunching structure, and a reinforcing mesh is arranged on the inner side face of the groove.
2. The formwork support bracket for a longspan post-tensioned prestressed girder haunched structure according to claim 1, wherein adjacent sides of said first support bracket and said second support bracket are welded;
the bottom end face of the second support frame is provided with a horizontal support plate, the left side and the right side of the horizontal support plate extend out to form a wing plate, and a plurality of first connecting holes are formed in the wing plate;
a plurality of second connecting holes are formed in the edges of the left side and the right side of the bottom end face of the first support frame;
the first support frame and the second support frame are fixedly connected through the first connecting hole and the second connecting hole by the connecting piece.
3. The formwork support bracket for a large-span post-tensioned prestressed beam haunched structure according to claim 1, wherein a left diagonal fixing rod and a right diagonal fixing rod are provided on the outer side surfaces of the first support bracket and the second support bracket;
the left oblique fixing rod and the right oblique fixing rod extend downwards to the outer side face of the support frame body and are welded with the support frame body.
4. The formwork support bracket for a large-span post-tensioned prestressed beam haunched structure according to claim 1, wherein said support bracket body comprises:
the upright stanchion is fixed on a plane supporting plate;
the horizontal rod is connected with the vertical rod, and the length of the horizontal rod extending to the adjacent plate lower support system is not less than that of the vertical rod;
and the vertical cross braces are continuously erected on the intersection points of the vertical rods and the horizontal rods from bottom to top.
5. The formwork support bracket for a longspan post-tensioned prestressed girder haunch structure as claimed in claim 2, wherein the overlapping length of the vertical cross braces is 1m, and is fixed by using 3 rotary fasteners, wherein the distance from the edge of the end fastener cover plate to the end of the vertical cross braces is not less than 10 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021660443.0U CN212927033U (en) | 2020-08-11 | 2020-08-11 | Formwork support frame for large-span post-tensioned prestressed beam haunch structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021660443.0U CN212927033U (en) | 2020-08-11 | 2020-08-11 | Formwork support frame for large-span post-tensioned prestressed beam haunch structure |
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| Publication Number | Publication Date |
|---|---|
| CN212927033U true CN212927033U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021660443.0U Active CN212927033U (en) | 2020-08-11 | 2020-08-11 | Formwork support frame for large-span post-tensioned prestressed beam haunch structure |
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| CN (1) | CN212927033U (en) |
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- 2020-08-11 CN CN202021660443.0U patent/CN212927033U/en active Active
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