CN215254604U - Template support system encorbelments - Google Patents
Template support system encorbelments Download PDFInfo
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- CN215254604U CN215254604U CN202121015617.2U CN202121015617U CN215254604U CN 215254604 U CN215254604 U CN 215254604U CN 202121015617 U CN202121015617 U CN 202121015617U CN 215254604 U CN215254604 U CN 215254604U
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Abstract
The utility model discloses an overhanging formwork support system, which comprises an overhanging support platform, a full formwork support frame and an outer protection frame, wherein the overhanging support platform comprises an I-steel girder, an I-steel connecting beam, a channel steel diagonal brace, an anchor ring, a channel steel diagonal brace embedded part and a scaffold board, the full formwork support frame is arranged above the overhanging end of the overhanging support platform and comprises a vertical rod, a ground sweeping rod, a horizontal rod, an adjustable U-shaped support, a main keel, a secondary keel, a veneer wood formwork and a scissor brace, the outer protection frame is arranged outside the full formwork support frame, the utility model has the advantages of simple installation, convenience and rapidness, avoiding the serious waste of construction period, reducing the input of materials such as steel pipes and fasteners in construction site, reducing construction cost, solving the problem of too large deflection caused by the I-steel girder, firm and reliable structure, high construction safety and wide application prospect, is beneficial to popularization and application.
Description
Technical Field
The utility model relates to a construction technical field especially relates to a template support system encorbelments.
Background
In order to meet the fire-fighting and evacuation requirements of high-rise buildings, an overhanging fire-fighting corridor is arranged between two adjacent high-rise units, and although the overhanging concrete structure is not difficult in the design stage, a plurality of technical difficulties exist in the field construction process. In the construction of the cantilever concrete structure at the present stage, a floor type full framing scaffold system and a steel wire rope stay cable and I-steel cantilever beam combination and full formwork support frame system are mainly adopted. However, when the floor type full hall scaffold is erected, the construction site field hardly meets the height-width ratio of the scaffold body, the erection period is long, the control on the construction period is not favorable, the lease period of the required materials such as steel pipes and fasteners is long, and the serious waste of the construction cost is caused. Meanwhile, the floor type full scaffold is high in erection height, the number of lap joints of the vertical rods is large, and the stability of the scaffold body is difficult to guarantee. After the concrete floor slab of the cantilever layer is finished, one end of the I-shaped steel is fixed on the floor slab by utilizing an embedded part embedded on the floor slab, the cantilever end of the I-shaped steel is obliquely pulled on the structural beam of the upper layer by adopting the steel wire rope, and the I-shaped steel is used as a supporting point of the full formwork supporting frame for subsequent construction. However, the support system still has limitations, and since the steel wire ropes are obliquely pulled to the structural beam on the upper layer, the construction of the fire-fighting corridor needs to be delayed from that of the same-layer structure. Therefore, it is urgently needed to develop an overhanging form supporting system to solve the above technical problems.
In view of this, the present invention is especially provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a template support system encorbelments, the installation is simple, and convenient and fast has not only avoided the extravagant serious phenomenon of time limit for a project, has reduced the input of materials such as job site steel pipe, fastener, reduces construction cost, has still solved the too big problem of amount of deflection that the I-steel girder overlength caused, and the sound construction is reliable, and the construction safety is high, has wide application prospect, is favorable to popularizing and applying.
In order to achieve the purpose, the utility model provides an overhanging formwork support system, which comprises an overhanging support platform, a full formwork support frame and an outer protection frame;
the cantilever supporting platform comprises an I-steel main beam, an I-steel connecting beam, a channel steel diagonal brace, an anchor ring, a channel steel diagonal brace embedded part and a scaffold board, wherein the inner end of the I-steel main beam is anchored on a poured floor by the anchor ring, the outer end of the I-steel main beam is used as a supporting point of a full formwork supporting frame and an outer protective frame, the I-steel connecting beam is vertically welded on the I-steel main beam, the scaffold board is fully laid on the I-steel connecting beam, the lower ends of the channel steel diagonal braces are arranged side by side from front to back along the length direction of the I-steel main beam, the bottom ends of the channel steel diagonal braces are welded on the channel steel diagonal brace embedded part embedded in the floor surface of a lower floor, and the upper ends of the channel steel diagonal braces are welded on the I-steel main beam;
the full formwork support frame is erected above the overhanging end of the overhanging support platform and comprises a vertical rod, a floor sweeping rod, a horizontal rod, an adjustable U-shaped support, a main keel, a secondary keel, a glued wood formwork and a shear brace, wherein the vertical rod is used for erecting the floor sweeping rod and the horizontal rod, the bottom of the vertical rod is sleeved and welded on a short steel bar of an I-shaped steel connecting beam, the top of the vertical rod adopts the stress of the adjustable U-shaped support, the main keel, the secondary keel and the glued wood formwork are erected on the adjustable U-shaped support, and the vertical rods around the full formwork support frame body are provided with continuous vertical shear braces from bottom to top;
the outer protection frame is set up in the outside of full hall formwork support frame, including scaffold frame, scaffold board, horizontal string bag and close mesh net, the scaffold frame is set up by scaffold frame pole setting and scaffold frame horizontal pole and is formed, and the operation layer is along vertical full-spread scaffold board, and the horizontal string bag of non-operation layer full-spread is netted, hangs close mesh net along the outside of scaffold frame outer pole setting.
Preferably, the anchoring end of the I-beam main beam is fixed by adopting an anchor ring, the distance between the first anchor ring and the tail end of the I-beam main beam is 200mm, the distance between the two anchor rings is 200mm, and the outer end of the I-beam main beam is provided with two channel steel inclined struts.
Preferably, the anchor ring is U-shaped, is made of round steel with the diameter of 20mm, has the width of 200mm and the height of 450mm, is machined and cold-formed by a machine tool for thread screw threads, and has the length of not less than 150 mm.
Preferably, the channel steel diagonal brace adopts 12.6 channel steel, the lower end of the channel steel diagonal brace is supported on the lower floor, and the included angle between the channel steel diagonal brace and the lower floor is 45-60 degrees.
Preferably, the panel of the channel steel inclined strut embedded part is a steel plate with the thickness of 600mm multiplied by 300mm multiplied by 10mm, the material is Q235B, 6 HRB400E12mm anchoring steel bars are welded on the steel plate and limited by the thickness of a floor slab, the anchoring steel bars are in a bent anchoring form, the length of the anchoring section is 150mm, and hole control welding is adopted during welding.
Preferably, the I-steel connecting beam is made of 16# I-steel and is made of Q235B, the I-steel connecting beam is vertically placed on the main beam and welded with the I-steel main beam in a girth welding mode, and the height of a welding line is 5 mm.
Preferably, the cantilever support platform scaffold board adopts a wood scaffold board, the thickness is 40mm, the board width is 200mm, the material is fir or pinus koraiensis boards which are not lower than the national second-class material standard, and two ends of the cantilever support platform scaffold board are screwed by 16# lead wires.
Preferably, the full formwork support frame is erected by adopting 4.8m multiplied by 3.0mm steel pipes, the vertical distance between the vertical rods is 1200mm, the transverse distance between the vertical rods is 900mm, the vertical rods are 200mm away from the ground, one floor sweeping rod is arranged, the step distance between the horizontal rods in the first step on the floor sweeping rod is 900mm, the horizontal rod in the uppermost step is erected according to the field condition, and the free end of each vertical rod is ensured to be less than or equal to 650 mm.
Preferably, the outer protection frame is built by adopting 4.8m multiplied by 3.0mm steel pipes, the vertical distance between upright rods of the scaffold is 1200mm, the transverse distance is 600mm, the step pitch is 1200mm, 16# lead wires are adopted for screwing the scaffold boards of the outer protection frame and the scaffold boards, and the specification of the dense mesh net is 2000 meshes/100 cm2。
Preferably, the length of the adjustable U-shaped support is 450mm, the main keel is of an all-steel structure, the section size is 50mm multiplied by 70mm multiplied by 3.0mm, the secondary keel is made of square steel and two-face-hole steel clad wood, the section size of the square steel is 40mm multiplied by 2.2mm, the section size of the two-face-hole steel clad wood is 40mm multiplied by 2.0mm, and the thickness of the laminated wood template is 15 mm.
The utility model provides a pair of template support system encorbelments has following beneficial effect.
1. The utility model discloses the installation is simple, and convenient and fast has avoided the extravagant serious phenomenon of time limit for a project, has reduced the input of materials such as job site steel pipe, fastener, reduces construction cost, and it is longer to have abandoned the period of setting up in the traditional console mode full hall scaffold work progress, and the time limit for a project is extravagant serious, and material lease cycle such as steel pipe, fastener is long, drawbacks such as construction cost is extravagant.
2. The utility model discloses an end of encorbelmenting at the I-steel girder increases the channel-section steel bracing, is equivalent to increasing the atress support at the end of encorbelmenting, has changed the atress of I-steel girder, as the fulcrum of full formwork support frame, make full use of the supporting capability of current structure, has solved the too big problem of amount of deflection that the I-steel girder overlength caused.
3. The utility model discloses full shop scaffold board on I-steel even roof beam, the outer protection frame is set up in the full hall formwork support frame outside, forms the inclosed working face in high altitude, has ensured the safety of construction operation personnel at the high altitude construction in-process.
4. The utility model discloses a secondary joist adopts square steel and two sides hole ladle wood, and square steel and two sides hole ladle wood intensity are high, non-deformable, and the specification roughness is high, has guaranteed construction precision and quality completely, and secondly square steel and two sides hole ladle wood material light in weight, the constructor of being convenient for builds.
5. The utility model discloses during the implementation, the structure of encorbelmenting outward constructs simultaneously with the layer reinforced concrete structure, has guaranteed the wholeness of structure.
Drawings
Fig. 1 is a schematic view of an overall structure of an overhanging form supporting system provided by the present invention;
fig. 2 is a schematic structural view of an anchor ring of the cantilever formwork support system provided by the present invention;
fig. 3 is a schematic plan view of a channel steel inclined strut embedded part of an overhanging formwork support system provided by the utility model;
fig. 4 is a schematic cross-sectional view of a channel steel inclined strut embedded part of an overhanging formwork support system provided by the utility model;
fig. 5 is an installation schematic view of a channel steel inclined strut embedded part of the cantilever formwork support system provided by the present invention;
fig. 6 is the utility model provides a pair of the channel-section steel bracing of template support system of encorbelmenting and the welding schematic diagram of I-steel girder.
In the figure:
1. the novel structural beam comprises an I-shaped steel main beam 2, an anchor ring 21, a thread screw 22, a double nut 23, an anchor ring steel plate 24, round steel 25 with the diameter of 20mm, HRB400E18mm reinforcing steel bars 3, channel steel inclined strut embedded parts 31, a panel 32, HRB400E12mm anchoring steel bars 33, channel steel inclined struts and channel steel inclined strut embedded part welding points 4, channel steel inclined struts and I-shaped steel main beam welding points 5, channel steel inclined struts 6, an outer cantilever concrete member 7, a glued wood template 8, an adjustable U-shaped support 9, a main keel 10, a secondary keel 11, a sweeping rod 12, a horizontal rod 13, a vertical rod 14, a shear strut 15, a scaffold plate 16, a horizontal pocket net 17, a scaffold plate 18, a dense mesh net 19, HRB400E25mm short steel bars 20 and I-shaped steel connecting beams.
Detailed Description
The present invention will be further described with reference to the following specific embodiments and accompanying drawings to facilitate understanding of the present invention.
As shown in fig. 1, for the utility model provides an overall structure schematic diagram of a template support system encorbelments. The overhanging formwork support system comprises an overhanging support platform, a full formwork support frame arranged above an overhanging end of the overhanging support platform and an outer protection frame arranged outside the full formwork support frame. The cantilever supporting platform comprises an I-steel girder 1, an I-steel connecting beam 20, a channel steel inclined strut 5, an anchor ring 2, a channel steel inclined strut embedded part 3 and a scaffold board 15, the I-steel girder 1 is made of 18# I-steel, the material is Q235B, the inner end of the I-steel girder adopts the anchor ring 2 to anchor on a poured floor, the outer end of the I-steel girder is used as a supporting point of a full formwork supporting frame and an outer protection frame, the anchor end of the I-steel girder 1 adopts the anchor ring 2 to be fixed, the first anchor ring 2 is 200mm away from the tail end of the I-steel girder 1, the distance between the two anchor rings is 200mm, and the front end of the I-steel girder 1 is provided with a limit anchor ring 2 for preventing swinging.
As shown in fig. 2, for the utility model provides an anchor ring structure sketch map of template support system encorbelments. The anchor ring 2 is U-shaped, is made of round steel 24 with the diameter of 20mm, has the width of 200mm and the height of 450mm, and the thread screw thread 21 at the end part of the anchor ring 2 is in threaded connection with the anchor ring steel plate 23 and the double nuts 22. The thread 21 is formed by cold bending by machine tool without threading or extruding and rolling, and has a length not less than 150 mm. The anchor ring 2 is buried at the lower side of the iron below the floor slab, 2 HRB400E18mm reinforcing steel bars 25 are respectively added at the bent hooks, and the HRB400E18mm reinforcing steel bars 25 are 1500mm long.
And two channel steel inclined struts 5 are arranged at the outer ends of the I-shaped steel main beams 1. The channel steel diagonal brace 5 is made of 12.6 channel steel, the lower end of the channel steel is supported on the lower floor, and the included angle between the channel steel diagonal brace and the lower floor is controlled to be 45-60 degrees. The lower ends of the channel steel inclined struts 5 are arranged side by side from front to back along the length direction of the I-shaped steel main beam 1, the bottom ends of the channel steel inclined struts are welded on the channel steel inclined strut embedded parts 3 embedded in the lower floor, and the upper ends of the channel steel inclined struts are welded on the I-shaped steel main beam 1. As shown in fig. 6, for the utility model provides a pair of the channel-section steel bracing of template support system encorbelments and the welding schematic diagram of I-steel girder. E43 type welding rods are adopted for welding the channel steel diagonal brace 5, the I-shaped steel main beam 1 and the channel steel diagonal brace embedded part 3, the welding mode is girth welding, the effective weld height is not less than 6mm, the effective length of one side is not less than 100mm, and the phenomena of slag inclusion, air holes and the like are avoided.
As shown in fig. 3-5, do respectively the utility model provides a channel-section steel bracing piece of template support system of encorbelmenting buries a schematic plan view, section schematic diagram and installation schematic diagram. The panel 31 of the channel steel inclined strut embedded part 3 is a steel plate with the thickness of 600mm multiplied by 300mm multiplied by 10mm, the material is Q235B, 6 HRB400E12mm anchoring steel bars 32 are welded on the steel plate and limited by the thickness of a floor slab, the HRB400E12mm anchoring steel bars 32 are in a bent anchoring form, the length of the anchoring sections is 150mm, and hole control welding is adopted during welding. And after the I-shaped steel main beam 1 and the channel steel inclined strut 5 are installed, the I-shaped steel connecting beam 20 is vertically welded on the I-shaped steel main beam 1. The I-steel connecting beam 20 is made of 16# I-steel and is made of Q235B, the I-steel connecting beam 20 is vertically placed on the I-steel main beam 1 and welded with the I-steel main beam 1 in a girth welding mode, and the height of a welding line is 5 mm. After the I-shaped steel connecting beam 20 is installed, the scaffold boards 15 are fully paved on the I-shaped steel connecting beam 20. The scaffold board 15 is a wood scaffold board, the thickness of the scaffold board is 40mm, the board width of the scaffold board is 200mm, the scaffold board is made of China fir or Korean pine boards which are not lower than the second grade material standard of China, and two ends of the scaffold board are screwed by 16# lead wires.
The full formwork support frame comprises a vertical rod 13, a floor sweeping rod 11, a horizontal rod 12, an adjustable U-shaped support 8, a main keel 9, a secondary keel 10, a glued wood formwork 7 and a shear brace 14, wherein the bottom of the vertical rod 13 is sleeved and welded on a short steel bar of an I-shaped steel connecting beam 20 and used for erecting the floor sweeping rod 11 and the horizontal rod 12, the main keel 9, the secondary keel 10 and the glued wood formwork 7 are erected on the adjustable U-shaped support 8, the full formwork support frame is erected by adopting 4.8m multiplied by 3.0mm steel pipes, the longitudinal distance of the vertical rod 13 is 1200mm, the transverse distance is 900mm, the vertical rod 13 is 200mm away from the ground and is provided with the floor sweeping rod 11, the horizontal rod 12 on the floor sweeping rod 11 is 900mm away in step by step, the horizontal rod 12 on the top is erected according to the field condition, and the free end of the vertical rod 13 is ensured to be less than or equal to 650 mm. The top of the upright post 13 of the full formwork support frame adopts a 450mm long adjustable U-shaped support 8 to bear force, the full formwork support frame is firstly paid off according to a design scheme when being erected, the position of the upright post 13 is determined, a 200mm long HRB400E25mm short steel bar 19 is welded on an I-shaped steel connecting beam 20 corresponding to the position of the upright post 13, and the bottom of the upright post 13 is sleeved in the short steel bar 19, so that the stability of the root of the frame body is ensured. The all-round formwork support frame body surrounding upright rods 13 are provided with continuous vertical cross braces 14 from bottom to top, and the width of each cross brace 14 is 4 spans and the cross braces are tightened and fastened. The main keel 9 is of an all-steel structure, the cross section dimension is 50mm multiplied by 70mm multiplied by 3.0mm, the secondary keel 10 is made of square steel and two-sided hole steel clad wood, the cross section dimension of the square steel is 40mm multiplied by 2.2mm, the cross section dimension of the two-sided hole steel clad wood is 40mm multiplied by 2.0mm, and the thickness of the glued wood template 7 is 15 mm.
The outside of full hall formwork support frame is set up to outer protection frame, including scaffold, scaffold board 17, horizontal string bag 16 and dense mesh 18, the scaffold is set up by scaffold pole setting and scaffold horizontal pole and is formed, outer protection frame adopts 4.8 mx 3.0mm steel pipe to set up, and the longitudinal spacing 1200mm of scaffold pole setting, horizontal spacing 600mm, stride 1200mm, and operation layer is along vertical full pavement scaffold board 17, adopts 16# lead wire to screw up between the scaffold board 17 and between scaffold board 17 and the scaffold, and non-operation layer full pavement horizontal string bag 16 hangs dense mesh 18 outside the outer pole setting of scaffold, dense mesh 18 specification is 2000 mesh 100cm2。
The utility model discloses the installation is simple, and convenient and fast has avoided the extravagant serious phenomenon of time limit for a project, has reduced the input of materials such as job site steel pipe, fastener, reduces construction cost, and it is longer to have abandoned the period of setting up in the traditional console mode full hall scaffold work progress, and the time limit for a project is extravagant serious, and material lease cycle such as steel pipe, fastener is long, drawbacks such as construction cost is extravagant. The utility model discloses an end of encorbelmenting at I-steel girder 1 increases channel-section steel bracing 5, is equivalent to increasing the atress support at the end of encorbelmenting, has changed I-steel girder 1's atress, as the fulcrum of full formwork support frame, make full use of the supporting capacity of current structure, has solved the too big problem of amount of deflection that I-steel girder 1 overlength caused. The utility model discloses full pavement scaffold board 15 on I-steel even roof beam 20, the outer protection frame is set up in the full hall formwork support frame outside, forms the inclosed working face in high altitude, has ensured the safety of construction operation personnel at the high altitude construction in-process. The utility model discloses a secondary joist 10 adopts square steel and two sides hole ladle wood, and square steel and two sides hole ladle wood intensity are high, non-deformable, and the specification roughness is high, has guaranteed construction precision and quality completely, and secondly square steel and two sides hole ladle wood material light in weight, the constructor of being convenient for builds. The utility model discloses during the implementation, the structure of encorbelmenting outward constructs simultaneously with the layer reinforced concrete structure, has guaranteed the wholeness of structure.
The utility model discloses a construction method does:
(1) the channel steel inclined strut embedded part 3 needs to be embedded on a floor surface when a two-layer structure is constructed in front of the outer overhanging concrete component 6, the distance between the channel steel inclined strut embedded part 3 and the outer edge of the structure is 600mm (center distance), and the channel steel inclined strut embedded part is embedded on the lower side of a floor slab reinforcing steel bar before the two-layer floor slab reinforcing steel bar construction. The channel steel inclined strut embedded part 3 needs to be manufactured before construction, a 600mm multiplied by 300mm multiplied by 10mm steel plate is adopted as a panel 31, 6 HRB400E12mm anchoring steel bars 32 are welded on the steel plate, the HRB400E12mm anchoring steel bars are in a bending anchoring mode, the anchoring section length is 150mm, the HRB400E12mm anchoring steel bar 32 non-anchoring section is bent for 50mm during welding, the bending section is integrally welded to the panel 31 in a double-sided mode, the lengths of welding seams on two sides are 100mm in total, elevation is strictly controlled when the channel steel inclined strut embedded part 3 is embedded, and after concrete is poured, the panel 31 of the channel steel inclined strut embedded part 3 and the concrete forming surface are at the same elevation.
(2) Before the construction of a front layer structure of an outer cantilever concrete member 6, anchor rings 2 need to be embedded according to the arrangement positions of I-shaped steel main beams 1, the positions need to be accurate, the deviation does not exceed 10mm, the fixed ends of the I-shaped steel main beams 1 need to be embedded with two U-shaped anchor rings 2 for fixing, the distance between a first anchor ring 2 and the tail end of the I-shaped steel main beam 1 is 200mm, the distance between the two anchor rings 2 is 200mm, and one limit anchor ring 2 is embedded at the front end of the I-shaped steel main beam 1 for preventing swinging. The anchor ring 2 is buried at the lower side of the iron below the floor slab, 2 HRB400E18mm reinforcing steel bars 25 are respectively added at the bent hooks, and the HRB400E18mm reinforcing steel bars 25 are 1500mm long.
(3) And after the pre-embedded anchor ring 2 is qualified, pouring floor concrete, and after the strength of the concrete reaches 10MPa, installing the I-shaped steel girder 1, wherein after the strength reaches 15MPa, the frame body can be gradually erected. The overhanging fulcrum of the I-shaped steel girder 1 is arranged on the structural beam, and the overhanging end arches 0.5-1% according to the length of the I-shaped steel girder 1. After the I-shaped steel girder 1 is placed into the reserved anchor ring 2, the I-shaped steel girder must be filled with a wooden wedge or a steel wedge, so that the I-shaped steel girder 1 is ensured not to shake in the horizontal direction.
(4) After the I-shaped steel girder 1 is installed, a temporary construction scaffold board 15 is laid on the I-shaped steel girder 1, and the channel steel inclined strut 5 is installed. And calculating a welding inclined plane according to the design angle of the inclined strut before the upper fulcrum and the lower fulcrum of the channel steel inclined strut 5 are welded with the I-shaped steel main beam 1 and the channel steel inclined strut embedded part 3, and cutting the welding inclined plane to be flat by using a cutting machine. The channel steel diagonal brace and I-steel main beam welding spot 4 and the channel steel diagonal brace and channel steel diagonal brace embedded part welding spot 33 adopt E43 type welding bars, the welding mode is girth welding, the effective welding seam height is not less than 6mm, the effective welding length on one side is not less than 100mm, and the phenomena of slag inclusion, air holes and the like are avoided.
(5) After the channel steel diagonal bracing 5 is welded, in order to ensure the safe operation of construction operators in the subsequent construction process, an outer protective frame is erected, and a scaffold board 17 is fully paved on an operation layer along the longitudinal direction, a horizontal pocket net 16 is fully paved on a non-operation layer, and a dense mesh net 18 is fully hung on the outer side of an outer upright rod of the scaffold.
(6) After the outer protective frame is erected, I-shaped steel connecting beams 20 are installed on the I-shaped steel main beams 1 according to the cross distance of the full formwork support frame, the I-shaped steel connecting beams 20 are vertically placed on the I-shaped steel main beams 1 and welded with the I-shaped steel main beams 1 in a girth welding mode, and the height of welding seams is 5 mm. And then, fully paving the scaffold boards 15 on the I-shaped steel connecting beam 20, and firmly binding the scaffold boards 15 and the I-shaped steel connecting beam 20.
(7) After the cantilever supporting platform is installed, the full formwork supporting frame is erected after the quality of each welding line is checked to be free of defects, and the full formwork supporting frame is erected by adopting a 48 multiplied by 3.0mm steel pipe and a fastener. When the device is erected, paying off is firstly carried out according to a design scheme, the position of the upright stanchion 13 is determined, 200mm long HRB400E25mm short steel bars 19 are welded on an I-steel connecting beam 20 corresponding to the position of the upright stanchion 13, the bottom of the upright stanchion 13 is sleeved in the I-steel connecting beam, the stability of the root of a frame body is ensured, steel pipes are arranged along the beam direction when the device is erected, and meanwhile, a ground sweeping rod 11 is arranged at a position 200mm away from the bottom of the upright stanchion 13, so that the upright stanchion 13 is vertical, stable and firm. The step pitch of the horizontal rod 12 of the first step on the floor sweeping rod 11 is 900mm, the uppermost step is erected according to the field condition, the free end of the vertical rod 13 is ensured to be less than or equal to 650mm, the top of the vertical rod 13 adopts a 450mm long adjustable U-shaped support 8 to bear force, meanwhile, the vertical rods 13 around the frame body are provided with continuous vertical cross braces 14 from bottom to top, and the width of each cross brace 14 is 4 spans and needs to be tensioned and fastened.
(8) And (3) paving a beam bottom die after the full formwork support frame is erected, placing the processed beam bottom die and the floor formwork on the full formwork support frame, reserving the position of a beam side formwork at the joint of the steel clad wood and the glued wood formwork 7 on the two sides of the beam bottom die, and sticking a sponge strip. And immediately setting the elevation and the axis of the bottom die of the adjusting beam according to a drawing and fixing.
(9) And after the beam bottom die and the floor slab template are paved, beam side dies are arranged, the height of the beam side dies is determined according to the design of a drawing, and the distance between the secondary keels 10 is not more than 200 mm. The joint of the beam side mold and the beam bottom mold is additionally provided with a steel clad wood with a through long two-side hole. The beam side mold is reinforced by using a diagonal bracing steel pipe or a wooden clamp, and the spacing is generally preferably 600 mm. When the height of the beam is larger than or equal to 600mm, split bolts are arranged, the horizontal spacing of the split bolts is 500mm, and the vertical spacing of the split bolts is 300 mm. The beam bottom die is provided with a large cross rod and a small cross rod, and before concrete is poured, the condition that accumulated water and sundries do not exist in the template is ensured.
(10) And (3) after the concrete pouring is finished and the formwork stripping condition is met, removing the formwork, namely removing the beam side formwork, removing the floor slab formwork and finally removing the beam bottom formwork. When the support is dismounted, the horizontal pull rod is firstly dismounted, then the support rod is dismounted, and the middle support rod is reserved to bear upper load. Before the support is removed, a temporary support is added at the secondary keel 10 to ensure that the main keel 9 does not fall off completely after the support is removed. When the formwork is removed, an operator stands in the removed gap, removes the support rods nearby, enables the keels to fall freely, and hooks the formwork down by the hooks from near to far.
The utility model discloses the installation is simple, and convenient and fast has not only avoided the extravagant serious phenomenon of time limit for a project, has reduced the input of materials such as job site steel pipe, fastener, reduces construction cost, has still solved the too big problem of amount of deflection that 1 overlength of I-steel girder caused, and the sound construction is reliable, and the construction safety is high, has wide application prospect, is favorable to popularizing and applying.
The present invention has been described in detail with reference to specific embodiments, and the description of the embodiments is only for the purpose of helping understanding the core idea of the present invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An overhanging formwork support system is characterized by comprising an overhanging support platform, a full formwork support frame and an outer protection frame;
the cantilever supporting platform comprises an I-steel main beam, an I-steel connecting beam, a channel steel diagonal brace, an anchor ring, a channel steel diagonal brace embedded part and a scaffold board, wherein the inner end of the I-steel main beam is anchored on a poured floor by the anchor ring, the outer end of the I-steel main beam is used as a supporting point of a full formwork supporting frame and an outer protective frame, the I-steel connecting beam is vertically welded on the I-steel main beam, the scaffold board is fully laid on the I-steel connecting beam, the lower ends of the channel steel diagonal braces are arranged side by side from front to back along the length direction of the I-steel main beam, the bottom ends of the channel steel diagonal braces are welded on the channel steel diagonal brace embedded part embedded in the floor surface of a lower floor, and the upper ends of the channel steel diagonal braces are welded on the I-steel main beam;
the full formwork support frame is erected above the overhanging end of the overhanging support platform and comprises a vertical rod, a floor sweeping rod, a horizontal rod, an adjustable U-shaped support, a main keel, a secondary keel, a glued wood formwork and a shear brace, wherein the vertical rod is used for erecting the floor sweeping rod and the horizontal rod, the bottom of the vertical rod is sleeved and welded on a short steel bar of an I-shaped steel connecting beam, the top of the vertical rod adopts the stress of the adjustable U-shaped support, the main keel, the secondary keel and the glued wood formwork are erected on the adjustable U-shaped support, and the vertical rods around the full formwork support frame body are provided with continuous vertical shear braces from bottom to top;
the outer protection frame is set up in the outside of full hall formwork support frame, including scaffold frame, scaffold board, horizontal string bag and close mesh net, the scaffold frame is set up by scaffold frame pole setting and scaffold frame horizontal pole and is formed, and the operation layer is along vertical full-spread scaffold board, and the horizontal string bag of non-operation layer full-spread is netted, hangs close mesh net along the outside of scaffold frame outer pole setting.
2. The cantilever formwork support system according to claim 1, wherein the anchoring end of the I-beam main beam is fixed by an anchor ring, the first anchor ring is 200mm away from the tail end of the I-beam main beam, the distance between the two anchor rings is 200mm, and the outer end of the I-beam main beam is provided with two channel steel inclined struts.
3. The cantilever formwork support system according to claim 2, wherein the anchor ring is U-shaped, is made of round steel with a diameter of 20mm, has a width of 200mm and a height of 450mm, and is formed by machining and cold-bending a thread screw by a machine tool and has a length of not less than 150 mm.
4. A cantilever formwork support system as claimed in claim 3, wherein the channel diagonal brace is [12.6 channel steel, the lower end of which is supported on the lower floor level at an angle of 45-60 ° to the lower floor level.
5. The cantilever formwork support system of claim 4, wherein the steel plate with the thickness of 600mm x 300mm x 10mm is adopted as the face plate of the channel steel inclined support embedded part, the material is Q235B, 6 HRB400E12mm anchoring steel bars are welded on the steel plate and limited by the thickness of a floor slab, the anchoring steel bars are in a bent anchoring mode, the length of the anchoring steel bars is 150mm, and hole control welding is adopted during welding.
6. The cantilever formwork support system according to claim 5, wherein the I-steel connecting beam is made of 16# I-steel and is made of Q235B, the I-steel connecting beam is vertically placed on the main beam and welded with the I-steel main beam in a girth welding mode, and the height of the welding line is 5 mm.
7. The cantilever formwork support system of claim 6, wherein the cantilever support platform scaffold board is a wooden scaffold board, the thickness of the cantilever support platform scaffold board is 40mm, the board width of the cantilever support platform scaffold board is 200mm, the cantilever support platform scaffold board is made of China fir or Korean pine boards which are not lower than the national second-class material standard, and two ends of the cantilever support platform scaffold board are screwed by 16# lead wires.
8. The cantilever formwork support system of claim 7, wherein the full formwork support frame is erected by adopting 4.8m × 3.0mm steel pipes, the vertical distance between the vertical rods is 1200mm, the transverse distance between the vertical rods is 900mm, a floor sweeping rod is arranged 200mm away from the ground, the step distance between the horizontal rods in the first step on the floor sweeping rod is 900mm, and the horizontal rod in the uppermost step is erected according to the field condition, so that the free end of the vertical rod is not more than 650 mm.
9. The cantilever formwork support system of claim 8, wherein the outer protection frame is built by adopting 4.8m x 3.0mm steel pipes, the vertical spacing between the upright posts of the scaffold is 1200mm, the transverse spacing between the upright posts of the scaffold is 600mm, the step pitch is 1200mm, 16# lead wires are adopted for screwing the scaffold boards of the outer protection frame and the scaffold boards and the scaffold, and the dense mesh specification is 2000 mesh/100 cm2。
10. The cantilever formwork support system of claim 9, wherein the adjustable U-shaped support is 450mm long, the main keel is of an all-steel structure and has a cross-sectional dimension of 50mm x 70mm x 3.0mm, the secondary keel is made of square steel and two-faced hole-clad wood, the cross-sectional dimension of the square steel is 40mm x 2.2mm, the cross-sectional dimension of the two-faced hole-clad wood is 40mm x 2.0mm, and the thickness of the laminated wood formwork is 15 mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114775993A (en) * | 2022-05-05 | 2022-07-22 | 标龙建设集团有限公司 | Construction method for overhanging structure high-support formwork buckling frame body |
| CN114790706A (en) * | 2022-04-27 | 2022-07-26 | 中铁大桥局集团第五工程有限公司 | Construction method for detachable support of cantilever cast-in-place plate of steel-concrete composite beam |
| CN114908960A (en) * | 2022-06-21 | 2022-08-16 | 中建七局(上海)有限公司 | Support system for refuge layer structure construction and construction method thereof |
| CN115075530A (en) * | 2022-07-01 | 2022-09-20 | 中亿丰建设集团股份有限公司 | Cantilever structure and construction method thereof |
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2021
- 2021-05-13 CN CN202121015617.2U patent/CN215254604U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114790706A (en) * | 2022-04-27 | 2022-07-26 | 中铁大桥局集团第五工程有限公司 | Construction method for detachable support of cantilever cast-in-place plate of steel-concrete composite beam |
| CN114775993A (en) * | 2022-05-05 | 2022-07-22 | 标龙建设集团有限公司 | Construction method for overhanging structure high-support formwork buckling frame body |
| CN114908960A (en) * | 2022-06-21 | 2022-08-16 | 中建七局(上海)有限公司 | Support system for refuge layer structure construction and construction method thereof |
| CN115075530A (en) * | 2022-07-01 | 2022-09-20 | 中亿丰建设集团股份有限公司 | Cantilever structure and construction method thereof |
| CN115075530B (en) * | 2022-07-01 | 2024-03-22 | 中亿丰建设集团股份有限公司 | Cantilever structure and construction method thereof |
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