CN112854751B - Supporting and dismantling method for inverted-ladder outward-convex parapet top pouring template supporting system - Google Patents

Supporting and dismantling method for inverted-ladder outward-convex parapet top pouring template supporting system Download PDF

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Publication number
CN112854751B
CN112854751B CN202110277692.4A CN202110277692A CN112854751B CN 112854751 B CN112854751 B CN 112854751B CN 202110277692 A CN202110277692 A CN 202110277692A CN 112854751 B CN112854751 B CN 112854751B
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China
Prior art keywords
stretcher
horizontal
parapet
horizontal cantilever
pin shaft
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CN202110277692.4A
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CN112854751A (en
Inventor
申腾
焦鹏飞
杨志东
闫晨星
李晋杰
雷秀清
吴慧娟
高俊斌
郝亚慧
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Shanxi Sanjian Group Co Ltd
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Shanxi Sanjian Group Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/08Forms, which are completely dismantled after setting of the concrete and re-built for next pouring
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • E04G13/062Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for stairs or steps
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • E04G13/066Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for overhangs
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G19/00Auxiliary treatment of forms, e.g. dismantling; Cleaning devices

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)

Abstract

The invention discloses a supporting and dismantling method of a support system for a pouring template at the top of an inverted-ladder-shaped externally-convex parapet wall, which solves the problem that the pouring template at the top of the inverted-ladder-shaped externally-convex parapet wall is difficult to support and dismantle. Designing an integral stretcher type cantilever frame, wherein the integral stretcher type cantilever frame consists of an upper end horizontal cantilever stretcher, a lower end horizontal cantilever stretcher and an inclined connection stretcher, the inner side end of the upper end horizontal cantilever stretcher is fixedly connected to the top end of an inner side vertical template of a parapet wall, the inner side end of the lower end horizontal cantilever stretcher is fixedly connected to the top end of an outer side vertical template of the parapet wall, the upper end of the inclined connection stretcher is hinged to the outer side end of the upper end horizontal cantilever stretcher, and the lower end of the inclined connection stretcher is hinged to the outer side end of the lower end horizontal cantilever stretcher; a plurality of pairs of elongated holes are correspondingly arranged on two parallel stretcher rods of the inclined connection stretcher at intervals, pin shafts are movably arranged in the corresponding elongated holes, foldable step supporting rods are hinged on the pin shafts, and the two foldable step supporting rods form 90-degree steps.

Description

Supporting and dismantling method for inverted-ladder outward-convex parapet top pouring template supporting system
Technical Field
The invention relates to a concrete pouring template system, in particular to a pouring template supporting system at the top of an inverted step outer convex parapet and a supporting and dismantling method thereof.
Background
For a high-rise building with a cast-in-place reinforced concrete shear wall frame, a parapet wall is generally arranged on a roof; in order to outstandingly beautify the appearance of the top of the building, the tops of some parapets are designed into an inverted step-shaped outwards convex concrete modeling shape, and the concrete pouring templates at the tops of the modeled parapets are erected and generally spliced in sequence in a segmented manner, so that the defects of complicated erection and dismantling of the inverted step-shaped outwards convex top templates, difficulty in dismantling and high risk in the construction process exist; when the template is erected and dismantled, a temporary outward-hanging cantilever frame needs to be erected, so that the construction period is prolonged, the construction cost is increased, in addition, in the operation process, greater potential safety hazards exist, and the repeated utilization rate of the dismantled template is also low; in addition, the spliced inverted-step-shaped convex formwork has the phenomena of poor appearance and appearance of the model and easiness in corner damage after the formwork is dismantled, rework maintenance is needed in the later period, and the construction cost is increased.
Disclosure of Invention
The invention provides a parapet pouring template system with an inverted-stair-shaped convex top and a supporting method thereof, and solves the technical problems that a parapet pouring template with an inverted-stair-shaped convex top is difficult to support and detach and low in repeated utilization rate.
The invention solves the technical problems by the following technical scheme:
the general concept of the invention is: designing an integral stretcher type cantilever frame, wherein the integral stretcher type cantilever frame bears the supporting task of a concrete pouring template at the top of the parapet wall with the inverted step shape and the outward convex shape; the integral stretcher type cantilever frame consists of an upper end horizontal cantilever stretcher, a lower end horizontal cantilever stretcher and an inclined connection stretcher, wherein the inner side end of the upper end horizontal cantilever stretcher is fixedly connected to the top end of the inner side vertical template of the parapet wall, the inner side end of the lower end horizontal cantilever stretcher is fixedly connected to the top end of the outer side vertical template of the parapet wall, the upper end of the inclined connection stretcher is hinged with the outer side end of the upper end horizontal cantilever stretcher, and the lower end of the inclined connection stretcher is hinged with the outer side end of the lower end horizontal cantilever stretcher; a plurality of pairs of elongated holes are correspondingly arranged on two parallel stretcher bars which are obliquely connected with the stretcher at intervals, pin shafts are movably arranged in the corresponding elongated holes, foldable step support rods are hinged on the pin shafts, when the pin shafts in each pair of elongated holes move to the bottom ends of the elongated holes, the two foldable step support rods which are hinged together form a 90-degree step shape, and parapet pouring templates with inverted-step-shaped convex tops are erected above and on the inner sides of the 90-degree step support rods; after concrete pouring is finished, the whole stretcher-type cantilever frame can be integrally taken down only by connecting the inner side end of the upper-end horizontal overhanging stretcher with the parapet wall inner-side vertical template and removing the connection between the inner side end of the lower-end horizontal overhanging stretcher and the parapet wall outer-side vertical template; the whole stretcher type cantilever frame can be flexibly combined according to the number of the steps of the inverted steps; the formwork support system is easy to erect and dismantle, the top concrete is attractive in modeling, and the modeling edges and corners are greatly prevented from being damaged during dismantling.
A supporting system for pouring formworks on the top of an inverted-step outwards-convex parapet wall comprises a roof plate, parapet wall steel reinforcement frameworks are respectively arranged on the roof plate, parapet wall outside upright formworks and parapet wall inside formworks are respectively and fixedly arranged on two sides of the parapet wall steel reinforcement frameworks, split bolts are arranged between the parapet wall outside upright formworks and the parapet wall inside formworks, an upper-end horizontal cantilever stretcher is connected to the top end of the parapet wall inside formworks, a lower-end horizontal cantilever stretcher is connected to the top end of the parapet wall outside upright formworks, an inclined connection stretcher is arranged between the outer side end of the upper-end horizontal cantilever stretcher and the outer side end of the lower-end horizontal cantilever stretcher, paired elongated holes are correspondingly arranged on two parallel stretcher bars of the inclined connection stretcher, the paired elongated holes are arranged at intervals along the directions of the parallel stretcher bars, in each paired elongated hole, each movable pin shaft is movably provided with a movable pin shaft, the outer side end of the horizontal support rod of the lower step and the lower end of the vertical support rod of the upper step are respectively hinged on the movable pin shaft, and the inner side 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 shaft of the support rod of the same step; when the movable pin shaft slides to the bottom end positions of the paired strip holes, the included angle between the horizontal support rod of the lower step and the vertical support rod of the same step is 90 degrees; the top surface of the lower-step horizontal support rod is provided with a step horizontal template support wood ridge, the step horizontal template support wood ridge is provided with a step horizontal template, the inner side surface of the upper-step vertical support rod is provided with a step vertical template support wood ridge, and the step vertical template support wood ridge is provided with a step vertical template.
The outer side end of the lower end horizontal cantilever stretcher is hinged with the lower end of the inclined connection stretcher through a stretcher connection lower pin shaft, and the upper end of the inclined connection stretcher is hinged with the outer side end of the upper end horizontal cantilever stretcher through a stretcher connection upper pin shaft; a pair of horizontal strip holes are formed in two parallel stretcher rods of the stretcher with the upper end horizontally cantilevered, a top end folding pin shaft is arranged in each horizontal strip hole, and the upper end of a vertical supporting rod of the uppermost step in the inverted steps is hinged to the top end folding pin shaft.
The utility model provides a method of tearing open of template support system is pour to outer convex parapet top of down ladder, includes the roof board, is provided with parapet framework of steel reinforcement on the roof board respectively, in parapet framework of steel reinforcement's both sides, fixedly respectively is provided with parapet outside upright template and parapet inside form board, between parapet outside upright template and parapet inside form board, is provided with the tie bolt, its characterized in that following step:
the method comprises the following steps that firstly, a stretcher with a horizontally overhanging upper end is manufactured, a pair of horizontal strip holes are correspondingly arranged on two parallel stretcher rods of the stretcher with the horizontally overhanging upper end, and a stretcher connecting upper pin shaft is arranged at the outer side end of the stretcher with the horizontally overhanging upper end; manufacturing a stretcher with a horizontal cantilever at the lower end; manufacturing an inclined connection stretcher, wherein paired long bar holes are correspondingly arranged on two parallel stretcher bars of the inclined connection stretcher, the number of the paired long bar holes is equal to the number of steps of the inverted steps at the top of the inverted step outer convex parapet, and the paired long bar holes are arranged at intervals along the trend of the stretcher bars; respectively manufacturing a lower step horizontal support rod and an upper step vertical support rod, wherein the number of the lower step horizontal support rods and the number of the upper step vertical support rods are equal to the number of steps of the inverted steps;
secondly, fixedly connecting the inner side end of the upper end horizontal cantilever stretcher manufactured in the first step to the top end of the parapet wall inner side template, and enabling the upper end horizontal cantilever stretcher to be horizontally cantilevered outwards; fixedly connecting the inner side end of the lower end horizontal cantilever stretcher manufactured in the first step to the top end of the vertical template outside the parapet wall, and enabling the lower end horizontal cantilever stretcher to be horizontally cantilevered outwards;
thirdly, connecting the upper end of the obliquely-connected stretcher manufactured in the first step with the outer side end of the upper-end horizontally-overhanging stretcher, and connecting the upper end with an upper pin shaft through the stretcher and hinging the upper end with the outer side end with the upper pin shaft together; the outer side end of the stretcher with the lower end horizontally cantilevered is obliquely connected with the lower end of the stretcher, and is hinged together by a stretcher connecting lower pin shaft;
fourthly, hinging the lower end of the vertical supporting rod of the same step on a lower pin shaft connected with the stretcher, hinging the upper end of the vertical supporting rod of the same step with the inner side end of the horizontal supporting rod of the lower step through a hinge pin shaft hinged with the supporting rod of the same step, movably arranging a movable pin shaft in a second paired long hole from bottom to top on the inclined connection stretcher, hinging the outer side end of the horizontal supporting rod of the lower step on the movable pin shaft, and hinging the lower end of the vertical supporting rod of the upper step on the movable pin shaft; according to the connection method, the horizontal support rod and the vertical support rod of the second step and the steps above the second step are hinged together, the upper end of the vertical support rod of the uppermost step is hinged on the top end folding pin shaft, and the top end folding pin shaft is movably arranged in a pair of horizontal strip holes; moving the movable pin shaft in each pair of long strip holes to the lowest end positions of the pair of long strip holes, so that all the horizontal support rods and the vertical support rods which are hinged together form an inverted step shape;
step five, arranging step horizontal formwork support wooden ridges and step horizontal formworks on each horizontal support rod of the inverted step-shaped support system formed in the step four; step vertical formwork support wood ridges and step vertical formworks are respectively arranged on the inner sides of the vertical support rods of the inverted step-shaped support system formed in the fourth step; finishing the erection of a pouring template at the top of the inverted step outer convex parapet wall;
sixthly, integrally pouring concrete on the parapet wall;
seventhly, after the concrete of the poured parapet wall is initially set, detaching the connecting node of the inner side end of the upper end horizontal cantilever stretcher at the top end of the parapet wall inner side template, and detaching the connecting node of the inner side end of the lower end horizontal cantilever stretcher at the top end of the parapet wall outer side upright template;
eighthly, horizontally moving the upper end horizontal cantilever stretcher, the inclined connection stretcher and the lower end horizontal cantilever stretcher which are connected together to the outer side of the parapet, separating the horizontal support rod and the vertical support rod from the corresponding wood ridge and the step template, and disassembling each pouring template at the top of the inverted step convex parapet;
and ninthly, moving the movable pin shafts upwards along the paired elongated holes where the movable pin shafts are located, and moving the top end folding pin shafts backwards along the pair of horizontal elongated holes to enable the upper end horizontal cantilever stretcher, the inclined connection stretcher and the lower end horizontal cantilever stretcher to be folded together for storage and standby.
The invention has simple structure, convenient and quick installation and disassembly, the supporting body is of an integral structure and can be repeatedly used, and the forming quality of the top template of the parapet wall is greatly improved.
Drawings
FIG. 1 is a schematic side view of the present invention;
FIG. 2 is a schematic view of the present invention in a front view;
fig. 3 is a schematic perspective view of the present invention.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
a supporting system for a pouring template at the top of an inverted ladder convex parapet wall comprises a roof board 1, parapet wall steel reinforcement frameworks 2 are respectively arranged on the roof board 1, parapet wall outer side vertical templates 3 and parapet wall inner side templates 4 are respectively and fixedly arranged at two sides of the parapet wall steel reinforcement frameworks 2, a cross bolt 5 is arranged between the parapet wall outer side vertical templates 3 and the parapet wall inner side templates 4, an upper end horizontal cantilever stretcher 6 is connected at the top end of the parapet wall inner side templates 4, a lower end horizontal cantilever stretcher 7 is connected at the top end of the parapet wall outer side vertical templates 3, an inclined connection stretcher 8 is arranged between the outer side end of the upper end horizontal cantilever stretcher 6 and the outer side end of the lower end horizontal cantilever stretcher 7, paired long strip holes 9 are correspondingly arranged on the two parallel stretcher rods which are obliquely connected with the stretcher 8, the paired long strip holes 9 are arranged along the direction of the parallel frame rods at intervals, a movable pin shaft 10 is movably arranged in each pair of elongated holes 9, the movable pin shaft 10 is equivalent to a connecting cross arm between two parallel stretcher bars, the outer side end of a lower step horizontal support rod 11 and the lower end of an upper step vertical support rod 12 are respectively hinged on the movable pin shaft 10 on each movable pin shaft 10, and the inner side end of the lower step horizontal support rod 11 and the upper end of a same step vertical support rod 13 are hinged together through a same step support rod hinged pin shaft 14; when the movable pin shaft 10 slides to the bottom end positions of the paired strip holes 9, the included angle between the lower step horizontal support rod 11 and the same step vertical support rod 13 is 90 degrees; a step horizontal formwork support wood ridge 15 is arranged on the top surface of the lower step horizontal support rod 11, a step horizontal formwork 16 is arranged on the step horizontal formwork support wood ridge 15, a step vertical formwork support wood ridge 17 is arranged on the inner side surface of the upper step vertical support rod 12, and a step vertical formwork 18 is arranged on the step vertical formwork support wood ridge 17.
The outer side end of the lower end horizontal cantilever stretcher 7 is hinged with the lower end of the inclined connecting stretcher 8 through a stretcher connecting lower pin shaft 19, and the upper end of the inclined connecting stretcher 8 is hinged with the outer side end of the upper end horizontal cantilever stretcher 6 through a stretcher connecting upper pin shaft 20; a pair of horizontal elongated holes 21 are formed in two parallel stretcher bars of the stretcher 6 with the upper end horizontally cantilevered, a top end folding pin 22 is arranged in each horizontal elongated hole 21, and the upper end of the vertical support bar of the uppermost step of the inverted steps is hinged to the top end folding pin 22.
The utility model provides a method of tearing open of template support system is pour to outer convex parapet top of falling ladder, includes roof board 1, is provided with parapet framework of steel reinforcement 2 on roof board 1 respectively, in the both sides of parapet framework of steel reinforcement 2, is fixed respectively to be provided with parapet outside upright template 3 and parapet inside form 4, between parapet outside upright template 3 and parapet inside form 4, is provided with split bolt 5, its characterized in that following step:
firstly, manufacturing an upper end horizontal cantilever stretcher 6, wherein a pair of horizontal strip holes 21 are correspondingly arranged on two parallel stretcher rods of the upper end horizontal cantilever stretcher 6, and a stretcher connecting upper pin shaft 20 is arranged at the outer side end of the upper end horizontal cantilever stretcher 6; manufacturing a stretcher 7 with a horizontal cantilever at the lower end; manufacturing an inclined connecting stretcher 8, correspondingly arranging paired strip holes 9 on two parallel stretcher bars of the inclined connecting stretcher 8, wherein the number of the paired strip holes 9 is equal to the number of steps of the inverted steps on the top of the inverted step outer convex parapet, and the paired strip holes 9 are arranged at intervals along the trend of the stretcher bars; respectively manufacturing a lower step horizontal support rod 11 and an upper step vertical support rod 12, wherein the number of the lower step horizontal support rods and the number of the upper step vertical support rods are equal to the number of steps of the inverted steps;
secondly, fixedly connecting the inner side end of the stretcher 6 with the upper end horizontally cantilevered manufactured in the first step to the top end of the parapet wall inner side template 4, and enabling the stretcher 6 with the upper end horizontally cantilevered to be horizontally cantilevered outwards; fixedly connecting the inner side end of the lower end horizontal overhanging stretcher 7 manufactured in the first step to the top end of the parapet outer side vertical template 3, and enabling the lower end horizontal overhanging stretcher 7 to be horizontally overhung outwards;
thirdly, the upper end of the stretcher 8 which is obliquely connected and manufactured in the first step is hinged with the outer side end of the upper horizontal cantilever stretcher 6 through a stretcher connecting upper pin shaft 20; the outer side end of the stretcher 7 with the lower end horizontally cantilevered is connected with the lower end of the stretcher 8 in an inclined way and is hinged with the lower pin shaft 19 through the stretcher;
fourthly, hinging the lower end of the vertical supporting rod 13 with the same step on a stretcher connecting lower pin shaft 19, hinging the upper end of the vertical supporting rod 13 with the same step with the inner side end of a horizontal supporting rod 11 with the lower step through a hinge pin 14 of the supporting rod with the same step, movably arranging a movable pin shaft 10 in a second pair of long holes 9 which are obliquely connected with the stretcher 8 from bottom to top, hinging the outer side end of the horizontal supporting rod 11 with the lower step on the movable pin shaft 10, and hinging the lower end of the vertical supporting rod 12 with the upper step on the movable pin shaft 10; according to the connection method, the horizontal support rod and the vertical support rod of the second step and the steps above are hinged together, the upper end of the vertical support rod of the uppermost step is hinged on the top end folding pin shaft 22, and the top end folding pin shaft 22 is movably arranged in a pair of horizontal strip holes 21; moving the movable pin 10 in each pair of elongated holes 9 to the lowest end position of the pair of elongated holes 9, so that all the horizontal support rods and the vertical support rods which are hinged together form an inverted step shape;
step five, arranging step horizontal formwork support wood ridges 15 and step horizontal formworks 16 on each horizontal support rod of the inverted step-shaped support system formed in the step four; step vertical formwork support wooden ridges 17 and step vertical formworks 18 are respectively arranged on the inner sides of the vertical support rods of the inverted step-shaped support system formed in the fourth step; finishing the erection of a pouring template at the top of the inverted step outer convex parapet wall;
sixthly, integrally pouring concrete of the parapet wall;
seventhly, after the poured concrete of the parapet wall is initially set, detaching a connecting node of the inner side end of the upper end horizontal cantilever stretcher 6 at the top end of the parapet wall inner side template 4, and detaching a fastener of a connecting node of the inner side end of the lower end horizontal cantilever stretcher 7 at the top end of the parapet wall outer side vertical template 3;
eighthly, horizontally moving the upper end horizontal cantilever stretcher 6, the inclined connecting stretcher 8 and the lower end horizontal cantilever stretcher 7 which are connected together to the outer side of the parapet wall, separating the horizontal supporting rod and the vertical supporting rod from the corresponding wood ridge and the step template, and disassembling each pouring template at the top of the inverted step outwards-convex parapet wall;
and ninthly, moving the movable pin shafts 10 upwards along the paired elongated holes 9 where the movable pin shafts are positioned, gradually transiting the right angle formed by the horizontal support rod and the vertical support rod to 180 degrees, and moving the top end folding pin shaft 22 backwards along the pair of horizontal elongated holes 21, so that the upper end horizontal cantilever stretcher 6, the inclined connection stretcher 8 and the lower end horizontal cantilever stretcher 7 are folded together for storage and standby.
During construction, after the parapet reinforcing steel bars are bound, the folding support system is installed, and concrete pouring operation can be performed after the folding support system is qualified through supervision and acceptance; when the form is removed, the folding support system is folded and folded by the lines, and then the form system of the parapet wall is continuously removed, so that the form removal operation can be completed; the folding support system can be used continuously in the next working section or the next engineering.

Claims (1)

1. The utility model provides a method of propping up and tearing open of template support system is pour to outer convex parapet top of down ladder, including roof board (1), be provided with parapet framework of steel reinforcement (2) on roof board (1) respectively, in the both sides of parapet framework of steel reinforcement (2), fixed parapet outside upright template (3) and parapet inside form board (4) of being provided with respectively, between parapet outside upright template (3) and parapet inside form board (4), be provided with tie bolt (5), its characterized in that following step:
firstly, manufacturing an upper end horizontal cantilever stretcher (6), correspondingly arranging a pair of horizontal strip holes (21) on two parallel stretcher rods of the upper end horizontal cantilever stretcher (6), and arranging a stretcher connecting upper pin shaft (20) at the outer side end of the upper end horizontal cantilever stretcher (6); manufacturing a stretcher (7) with a horizontal cantilever at the lower end; manufacturing an inclined connecting stretcher (8), correspondingly arranging paired long holes (9) on two parallel stretcher bars of the inclined connecting stretcher (8), wherein the number of the paired long holes (9) is equal to that of the steps of the inverted steps at the top of the inverted step outer convex parapet, and the paired long holes (9) are arranged at intervals along the trend of the stretcher bars; respectively manufacturing a lower-step horizontal support rod (11) and an upper-step vertical support rod (12), wherein the number of the lower-step horizontal support rods and the number of the upper-step vertical support rods are equal to the number of steps of the inverted steps;
secondly, fixedly connecting the inner side end of the upper end horizontal cantilever stretcher (6) manufactured in the first step to the top end of the parapet wall inner side template (4), and enabling the upper end horizontal cantilever stretcher (6) to be arranged in an outward horizontal cantilever manner; fixedly connecting the inner side end of the lower end horizontal cantilever stretcher (7) manufactured in the first step to the top end of the parapet outer side vertical template (3), and enabling the lower end horizontal cantilever stretcher (7) to be arranged in an outward horizontal cantilever manner;
thirdly, connecting the upper end of the obliquely-connected stretcher (8) manufactured in the first step with the outer side end of the upper end horizontal cantilever stretcher (6) through a stretcher connecting upper pin shaft (20) and hinging the obliquely-connected stretcher and the upper end horizontal cantilever stretcher together; the outer side end of the stretcher (7) with the lower end horizontally cantilevered is hinged with the lower end of the obliquely connected stretcher (8) through a stretcher connecting lower pin shaft (19);
fourthly, hinging the lower end of the vertical supporting rod (13) with the same step on a stretcher connecting lower pin shaft (19), hinging the upper end of the vertical supporting rod (13) with the same step with the inner side end of a horizontal supporting rod (11) with the lower step through a hinged pin shaft (14) with the supporting rod with the same step, movably arranging a movable pin shaft (10) in a second paired long hole (9) which is obliquely connected with the stretcher (8) and counted from bottom to top, hinging the outer side end of the horizontal supporting rod (11) with the lower step on the movable pin shaft (10), and hinging the lower end of the vertical supporting rod (12) with the upper step on the movable pin shaft (10); according to the connection method, the horizontal support rod and the vertical support rod of the second step and the steps above the second step are hinged together, the upper end of the vertical support rod of the uppermost step is hinged on a top end folding pin shaft (22), and the top end folding pin shaft (22) is movably arranged in a pair of horizontal strip holes (21); moving a moving pin shaft (10) in each pair of elongated holes (9) to the lowest end position of the pair of elongated holes (9) to enable all the horizontal support rods and the vertical support rods which are hinged together to form an inverted step shape;
fifthly, arranging step horizontal formwork support wooden ridges (15) and step horizontal formworks (16) on each horizontal support rod of the inverted step-shaped support system formed in the fourth step; step vertical template support wooden ridges (17) and step vertical templates (18) are respectively arranged on the inner sides of the vertical support rods of the support system in the shape of the inverted ladder formed in the fourth step; finishing the erection of a pouring template at the top of the inverted step outwards-convex parapet wall;
sixthly, integrally pouring concrete on the parapet wall;
seventhly, after the concrete of the poured parapet wall is initially set, detaching the connecting node of the inner side end of the upper end horizontal cantilever stretcher (6) at the top end of the parapet wall inner side template (4), and detaching the connecting node of the inner side end of the lower end horizontal cantilever stretcher (7) at the top end of the parapet wall outer side upright template (3);
eighthly, horizontally moving the upper-end horizontal cantilever stretcher (6), the inclined connection stretcher (8) and the lower-end horizontal cantilever stretcher (7) which are connected together to the outer side of the parapet, separating the horizontal support rods and the vertical support rods from the corresponding wood ridges, step horizontal templates and step vertical templates, and detaching all pouring templates at the top of the inverted step outer convex parapet;
and ninthly, moving the movable pin shafts (10) upwards along the paired long holes (9) where the movable pin shafts are positioned, and moving the top end folding pin shaft (22) backwards along the pair of horizontal long holes (21) to enable the upper end horizontal cantilever stretcher (6), the inclined connection stretcher (8) and the lower end horizontal cantilever stretcher (7) to be folded together for storage and standby.
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