The top casting formwork support system of the inverted stepped convex parapet

Abstract

The present invention discloses a support system for casting formwork on the top of an inverted stepped convex parapet, which solves the problem of difficulty in supporting and dismantling casting formwork on the parapet with an inverted stepped convex top. An integral stretcher-type cantilever frame is designed, which is composed of an upper horizontal cantilever stretcher, a lower horizontal cantilever stretcher and an inclined connection stretcher. The inner side end of the upper horizontal cantilever stretcher is fixedly connected to the top of the inner side vertical formwork of the parapet, the inner side end of the lower horizontal cantilever stretcher is fixedly connected to the top of the outer side vertical formwork of the parapet, the upper end of the inclined connection stretcher is hinged to the outer side end of the upper horizontal cantilever stretcher, and the lower end of the inclined connection stretcher is hinged to the outer side end of the lower horizontal cantilever stretcher; a plurality of pairs of long strip holes are correspondingly arranged on two parallel stretcher rods of the inclined connection stretcher at intervals, a pin is movably arranged in the corresponding long strip holes, a foldable step support rod is hinged on the pin, and the two foldable step support rods form a 90-degree step.

Description

Technical Field

[0001] The invention relates to a concrete pouring formwork system, in particular to a pouring formwork support system at the top of an inverted stepped outward convex parapet wall and a method for supporting and removing the system. Background Art

[0002] For high-rise buildings with cast-in-place reinforced concrete shear wall frames, parapets are generally set up on the roof; in order to highlight and beautify the appearance of the top of the building, the top of some parapets is designed to be an inverted stepped convex concrete shape. The concrete casting formwork on the top of the parapet of this shape is usually supported by segmented splicing, which has the defects of cumbersome support and removal of the inverted stepped convex top formwork, difficult removal and high risk in the construction process; when supporting and removing the formwork, it is necessary to set up a temporary outward cantilever frame, which prolongs the construction period and increases the construction cost, and there are great safety hazards in the operation process, and the reuse rate of the formwork after being removed is also low; in addition, the spliced ​​inverted stepped convex formwork has the problem of poor appearance and easy edge damage after the formwork is removed, which requires rework and repair at a later stage, increasing the construction cost. Summary of the invention

[0003] The invention provides a parapet wall casting formwork system with an inverted stepped convex top and a supporting method thereof, which solves the technical problems of difficulty in supporting and dismantling the parapet wall casting formwork with an inverted stepped convex top and low reuse rate.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of the present invention is to design an integral stretcher-type cantilever frame, which undertakes the task of supporting the top concrete pouring formwork of the inverted stepped convex parapet wall; the integral stretcher-type cantilever frame is composed of an upper horizontal cantilever stretcher, a lower horizontal cantilever stretcher and an inclined connection stretcher, the inner side end of the upper horizontal cantilever stretcher is fixedly connected to the top of the inner side vertical formwork of the parapet wall, the inner side end of the lower horizontal cantilever stretcher is fixedly connected to the top of the outer side vertical formwork of the parapet wall, the upper end of the inclined connection stretcher is hinged to the outer side end of the upper horizontal cantilever stretcher, and the lower end of the inclined connection stretcher is hinged to the outer side end of the lower horizontal cantilever stretcher; a plurality of pairs of long strip holes are correspondingly arranged at intervals on the two parallel stretcher rods of the inclined connection stretcher, and pins are movably arranged in the corresponding long strip holes, and the pins are fixedly connected to the pins. A foldable step support rod is hinged on the axis. When the pin shaft in each pair of long holes moves to the bottom end of the long holes, the two foldable step support rods hinged together form a 90-degree step shape, and the parapet casting template with an inverted step-shaped convex top is set up above and inside the step support rod in the 90-degree step shape; when the concrete pouring is completed, the overall stretcher-type cantilever frame can be removed as a whole by simply removing the connection between the inner end of the upper horizontal cantilever stretcher and the inner side vertical template of the parapet, and the connection between the inner end of the lower horizontal cantilever stretcher and the outer side vertical template of the parapet; the overall stretcher-type cantilever frame can be flexibly combined according to the number of steps of the inverted step; the template support system is easy to support and dismantle, the top concrete has a beautiful shape, and the shape edges are greatly avoided from being damaged during dismantling.

[0006] A support system for casting formwork on the top of an inverted stepped convex parapet wall, comprising a roof slab, on which a parapet wall reinforcement frame is respectively arranged, on both sides of the parapet wall reinforcement frame, a parapet wall outer vertical formwork and a parapet wall inner formwork are respectively fixedly arranged, between the parapet wall outer vertical formwork and the parapet wall inner formwork, a tension bolt is arranged, an upper horizontal cantilever stretcher is connected to the top of the parapet wall inner formwork, a lower horizontal cantilever stretcher is connected to the top of the parapet wall outer vertical formwork, an inclined connecting stretcher is arranged between the outer ends of the upper horizontal cantilever stretcher and the lower horizontal cantilever stretcher, and on two parallel stretcher rods of the inclined connecting stretcher, pairs of long strip holes are correspondingly arranged, the pairs of long strip holes are arranged at intervals along the parallel stretcher rods, and in each pair of long strip holes, A movable pin is movably provided, and on each movable pin, the outer end of the horizontal support rod of the lower step and the lower end of the vertical support rod of the upper step are hinged on the movable pin respectively, and the inner end of the horizontal support rod of the lower step and the upper end of the vertical support rod of the same step are hinged together through the hinge pin of the support rod of the same step; when the movable pin slides to the bottom end position of the paired long holes, the angle between the horizontal support rod of the lower step and the vertical support rod of the same step is 90 degrees; a step horizontal formwork supporting wooden slats is provided on the top surface of the horizontal support rod of the lower step, a step horizontal formwork is provided on the step horizontal formwork supporting wooden slats, a step vertical formwork is provided on the inner side surface of the vertical support rod of the upper step, and a step vertical formwork is provided on the step vertical formwork supporting wooden slats.

[0007] The outer end of the lower horizontal cantilever stretcher is hinged to the lower end of the inclined connected stretcher through the stretcher connecting lower pin, and the upper end of the inclined connected stretcher is hinged to the outer end of the upper horizontal cantilever stretcher through the stretcher connecting upper pin; a pair of horizontal long holes are provided on the two parallel stretcher rods of the upper horizontal cantilever stretcher, and a top folding pin is provided in the pair of horizontal long holes, and the upper end of the vertical support rod of the uppermost step in the inverted ladder is hinged to the top folding pin.

[0008] A method for supporting and dismantling a support system for a top casting formwork of an inverted stepped outer convex parapet wall, comprising a roof slab, a parapet wall steel bar skeleton is arranged on the roof slab, a parapet wall outer vertical formwork and a parapet wall inner formwork are fixedly arranged on both sides of the parapet wall steel bar skeleton, and a tension bolt is arranged between the parapet wall outer vertical formwork and the parapet wall inner formwork, characterized by the following steps:

[0009] The first step is to make an upper horizontal cantilever stretcher, and set a pair of horizontal long holes on the two parallel stretcher rods of the upper horizontal cantilever stretcher, and set a stretcher connecting pin on the outer end of the upper horizontal cantilever stretcher; make a lower horizontal cantilever stretcher; make an inclined connection stretcher, and set pairs of long holes on the two parallel stretcher rods of the inclined connection stretcher, and the number of the paired long holes is equal to the number of steps of the inverted stairs at the top of the inverted staircase outer convex parapet, and these paired long holes are arranged at intervals along the direction of the stretcher rod; respectively make lower step horizontal support rods and upper step vertical support rods, and the number of them is equal to the number of steps of the inverted stairs;

[0010] The second step is to fix the inner end of the upper horizontal cantilever stretcher made in the first step to the top of the inner template of the parapet, and to cantilever the upper horizontal cantilever stretcher outward horizontally; the inner end of the lower horizontal cantilever stretcher made in the first step is fixedly connected to the top of the outer vertical template of the parapet, and to cantilever the lower horizontal cantilever stretcher outward horizontally;

[0011] Step 3: hinge the upper end of the inclined connecting stretcher made in the first step and the outer end of the upper horizontal cantilever stretcher together through the stretcher connecting upper pin; hinge the outer end of the lower horizontal cantilever stretcher and the lower end of the inclined connecting stretcher together through the stretcher connecting lower pin;

[0012] The fourth step is to hinge the lower end of the vertical support rod of the same step on the lower pin connecting the stretcher, and hinge the upper end of the vertical support rod of the same step with the inner side end of the horizontal support rod of the lower step through the hinge pin of the support rod of the same step, and movably set a movable pin in the second paired long hole from bottom to top on the inclined stretcher, hinge the outer side end of the horizontal support rod of the lower step on the movable pin, and then hinge the lower end of the vertical support rod of the upper step on the movable pin; according to the above connection method, hinge the horizontal support rod and the vertical support rod of the second step and the steps above it together, and hinge the upper end of the vertical support rod of the uppermost step on the top folding pin, which is movably set in a pair of horizontal long holes; move the movable pin in each paired long hole to the lowermost position of the paired long hole, so that all the hinged horizontal support rods and vertical support rods form an inverted ladder shape;

[0013] Step 5: On each horizontal support rod of the inverted step-shaped support system formed in the fourth step, respectively set the step horizontal formwork to support the wooden slats and the step horizontal formwork; on the inner side of each vertical support rod of the inverted step-shaped support system formed in the fourth step, respectively set the step vertical formwork to support the wooden slats and the step vertical formwork; complete the erection of the pouring formwork on the top of the inverted step outer convex parapet;

[0014] Step 6: pour the concrete of the parapet as a whole;

[0015] Step 7. After the concrete of the poured parapet wall has initially set, the inner end of the upper horizontal cantilever stretcher is disassembled from the connection node at the top of the inner template of the parapet wall, and the inner end of the lower horizontal cantilever stretcher is disassembled from the connection node at the top of the outer vertical template of the parapet wall;

[0016] Step 8: Move the connected upper horizontal cantilever stretcher, inclined connecting stretcher and lower horizontal cantilever stretcher horizontally to the outside of the parapet at the same time, so that the horizontal support rod and the vertical support rod are separated from the corresponding wooden slats and step formwork, and remove the casting formworks on the top of the inverted step outer convex parapet;

[0017] Step 9. Move each movable pin upward along the paired long holes, and move the top folding pin backward along a pair of horizontal long holes, so that the upper horizontal cantilever stretcher, the inclined connecting stretcher and the lower horizontal cantilever stretcher are folded together and stored for later use.

[0018] The invention has a simple structure, is easy and quick to install and disassemble, and the supporting system is an integral structure and can be reused, thereby greatly improving the molding quality of the parapet top template. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention in a side view direction;

[0020] Figure 2 It is a schematic diagram of the structure of the present invention in the main viewing direction;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the accompanying drawings:

[0023] A support system for casting formwork at the top of an inverted stepped outer convex parapet wall, comprising a roof slab 1, on which a parapet wall reinforcement skeleton 2 is respectively arranged, on both sides of the parapet wall reinforcement skeleton 2, a parapet wall outer vertical formwork 3 and a parapet wall inner formwork 4 are respectively fixedly arranged, between the parapet wall outer vertical formwork 3 and the parapet wall inner formwork 4, a tension bolt 5 is arranged, an upper horizontal cantilever stretcher 6 is connected to the top of the parapet wall inner formwork 4, a lower horizontal cantilever stretcher 7 is connected to the top of the parapet wall outer vertical formwork 3, an inclined connecting stretcher 8 is arranged between the outer ends of the upper horizontal cantilever stretcher 6 and the outer ends of the lower horizontal cantilever stretcher 7, and on the two parallel stretcher rods of the inclined connecting stretcher 8, a pair of long strip holes 9 are correspondingly arranged, the pair of long strip holes 9 are arranged at intervals along the parallel stretcher rods, and in each pair of long strip holes 9, a movable pin shaft 10 is movably arranged, and the movable pin shaft 10 is relatively As the connecting crossbar between two parallel stretcher rods, on each moving pin 10, the outer end of the lower step horizontal support rod 11 and the lower end of the upper step vertical support rod 12 are respectively hinged on the moving pin 10, and the inner end of the lower step horizontal support rod 11 and the upper end of the same step vertical support rod 13 are hinged together through the same step support rod hinge pin 14; when the moving pin 10 slides to the bottom end position of the paired long holes 9, the angle between the lower step horizontal support rod 11 and the same step vertical support rod 13 is 90 degrees; a step horizontal template supporting wooden slats 15 are arranged on the top surface of the lower step horizontal support rod 11, and a step horizontal template 16 is arranged on the step horizontal template supporting wooden slats 15, and a step vertical template 17 is arranged on the inner side surface of the upper step vertical support rod 12, and a step vertical template 18 is arranged on the step vertical template supporting wooden slats 17.

[0024] The outer end of the lower horizontal cantilever stretcher 7 is hinged to the lower end of the inclined cantilever stretcher 8 through the stretcher connecting lower pin 19, and the upper end of the inclined cantilever stretcher 8 is hinged to the outer end of the upper horizontal cantilever stretcher 6 through the stretcher connecting upper pin 20; a pair of horizontal long holes 21 are provided on the two parallel stretcher rods of the upper horizontal cantilever stretcher 6, and a top folding pin 22 is provided in the pair of horizontal long holes 21, and the upper end of the vertical support rod of the uppermost step in the inverted ladder is hinged to the top folding pin 22.

[0025] A method for supporting and dismantling a support system for a top casting formwork of an inverted stepped outer convex parapet wall, comprising a roof slab 1, a parapet wall steel frame 2 is arranged on the roof slab 1, a parapet wall outer vertical formwork 3 and a parapet wall inner formwork 4 are fixedly arranged on both sides of the parapet wall steel frame 2, and a tension bolt 5 is arranged between the parapet wall outer vertical formwork 3 and the parapet wall inner formwork 4, characterized by the following steps:

[0026] The first step is to make an upper horizontal cantilever stretcher 6, and on the two parallel stretcher rods of the upper horizontal cantilever stretcher 6, a pair of horizontal long holes 21 are correspondingly set, and on the outer end of the upper horizontal cantilever stretcher 6, a stretcher connecting pin 20 is set; make a lower horizontal cantilever stretcher 7; make an inclined connecting stretcher 8, and on the two parallel stretcher rods of the inclined connecting stretcher 8, pairs of long holes 9 are correspondingly set, and the number of the paired long holes 9 is equal to the number of steps of the inverted stairs at the top of the inverted staircase outer convex parapet, and these pairs of long holes 9 are arranged at intervals along the direction of the stretcher rod; respectively make a lower step horizontal support rod 11 and an upper step vertical support rod 12, and their number is equal to the number of steps of the inverted stairs;

[0027] The second step is to fix the inner end of the upper horizontal cantilever stretcher 6 made in the first step to the top of the inner side template 4 of the parapet, and to make the upper horizontal cantilever stretcher 6 cantilever outward horizontally; the inner end of the lower horizontal cantilever stretcher 7 made in the first step is fixedly connected to the top of the outer side vertical template 3 of the parapet, and to make the lower horizontal cantilever stretcher 7 cantilever outward horizontally;

[0028] Step 3: hinge the upper end of the inclined connecting stretcher 8 made in the first step with the outer end of the upper horizontal cantilever stretcher 6 through the stretcher connecting upper pin 20; hinge the outer end of the lower horizontal cantilever stretcher 7 with the lower end of the inclined connecting stretcher 8 through the stretcher connecting lower pin 19;

[0029] Step 4: Hinged the lower end of the vertical support rod 13 of the same step on the pin 19 of the stretcher connection, and hinged the upper end of the vertical support rod 13 of the same step with the inner end of the horizontal support rod 11 of the lower step through the hinge pin 14 of the support rod of the same step. In the second pair of long holes 9 from the bottom to the top on the inclined connection stretcher 8, a movable pin 10 is movably set, and the outer end of the horizontal support rod 11 of the lower step is hinged on the movable pin 10, and then the lower end of the vertical support rod 12 of the upper step is also hinged. Hinged on the movable pin 10; according to the above connection method, the horizontal support rods and vertical support rods of the second step and the steps above are hinged together, and the upper end of the vertical support rod of the uppermost step is hinged on the top folding pin 22, and the top folding pin 22 is movably set in a pair of horizontal long strip holes 21; the movable pin 10 in each pair of long strip holes 9 is moved to the lowest position of the pair of long strip holes 9, so that all the hinged horizontal support rods and vertical support rods form an inverted step shape;

[0030] Step 5: On each horizontal support rod of the inverted step-shaped support system formed in the fourth step, a step horizontal formwork supporting wooden slats 15 and a step horizontal formwork 16 are respectively arranged; on the inner side of each vertical support rod of the inverted step-shaped support system formed in the fourth step, a step vertical formwork supporting wooden slats 17 and a step vertical formwork 18 are respectively arranged; the erection of the top casting formwork of the inverted step outer convex parapet is completed;

[0031] Step 6: pour the concrete of the parapet as a whole;

[0032] Step 7: After the concrete of the poured parapet wall has initially set, the inner end of the upper horizontal cantilever stretcher 6 is disassembled from the connection node at the top of the inner side formwork 4 of the parapet wall, and the fasteners on the connection node at the inner end of the lower horizontal cantilever stretcher 7 is disassembled from the top of the outer side vertical formwork 3 of the parapet wall;

[0033] Step 8: Move the connected upper horizontal cantilever stretcher 6, the inclined connecting stretcher 8 and the lower horizontal cantilever stretcher 7 horizontally to the outside of the parapet wall at the same time, so that the horizontal support rod and the vertical support rod are separated from the corresponding wooden slats and step formwork, and remove the casting formworks on the top of the inverted step outer convex parapet wall;

[0034] Step 9. Move each movable pin 10 upward along the paired long holes 9 where it is located, so that the right angle formed by the horizontal support rod and the vertical support rod gradually transitions to 180 degrees, and move the top folding pin 22 backward along a pair of horizontal long holes 21, so that the upper horizontal cantilever stretcher 6, the inclined connecting stretcher 8 and the lower horizontal cantilever stretcher 7 are folded together and stored for later use.

[0035] During construction, after the reinforcement of the parapet is tied, the foldable support system of the present invention is installed, and after passing the inspection and acceptance by the supervisor, the concrete pouring operation can be carried out; when removing the formwork, the foldable support system is folded and stored, and then the formwork system of the parapet is removed to complete the formwork removal operation; the foldable support system can also continue to be used in the next operation section or the next project.

Claims

1. A cast formwork support system for the top of an inverted stepped convex parapet wall, comprising a roof slab (1), a parapet wall reinforcement frame (2) is arranged on the roof slab (1), a parapet wall outer vertical formwork (3) and a parapet wall inner formwork (4) are fixedly arranged on both sides of the parapet wall reinforcement frame (2), and a tension bolt (5) is arranged between the parapet wall outer vertical formwork (3) and the parapet wall inner formwork (4), characterized in that: An upper horizontal cantilever stretcher (6) is connected to the top of the parapet inner template (4), and a lower horizontal cantilever stretcher (7) is connected to the top of the parapet outer vertical template (3). An inclined connecting stretcher (8) is provided between the outer ends of the upper horizontal cantilever stretcher (6) and the outer ends of the lower horizontal cantilever stretcher (7). Pairs of long holes (9) are correspondingly provided on two parallel stretcher rods of the inclined connecting stretcher (8). The pairs of long holes (9) are arranged at intervals along the parallel stretcher rods. A movable pin (10) is movably provided in each pair of long holes (9). On each movable pin (10), the outer ends of the lower step horizontal support rod (11) and the lower ends of the upper step vertical support rod (12) are respectively hinged on the movable pin (10). The inner side end of the lower step horizontal support rod (11) and the upper end of the same step vertical support rod (13) are hingedly connected together through the same step support rod hinge pin (14); when the movable pin (10) slides to the bottom end position of the paired long strip holes (9), the angle between the lower step horizontal support rod (11) and the same step vertical support rod (13) is 90 degrees; a step horizontal template supporting slat (15) is arranged on the top surface of the lower step horizontal support rod (11), and a step horizontal template (16) is arranged on the step horizontal template supporting slat (15); a step vertical template supporting slat (17) is arranged on the inner side surface of the upper step vertical support rod (12), and a step vertical template (18) is arranged on the step vertical template supporting slat (17).

2. The top casting formwork support system of the inverted stepped outward convex parapet according to claim 1 is characterized in that: The outer end of the lower horizontal cantilever stretcher (7) is hinged to the lower end of the inclined cantilever stretcher (8) through a stretcher connecting lower pin (19), and the upper end of the inclined cantilever stretcher (8) is hinged to the outer end of the upper horizontal cantilever stretcher (6) through a stretcher connecting upper pin (20); a pair of horizontal long holes (21) are provided on the two parallel stretcher rods of the upper horizontal cantilever stretcher (6), and a top folding pin (22) is provided in the pair of horizontal long holes (21), and the upper end of the vertical support rod of the uppermost step in the inverted ladder is hinged to the top folding pin (22).

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