CN117513740A - Cast-in-situ stair formwork system and construction method - Google Patents

Cast-in-situ stair formwork system and construction method Download PDF

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Publication number
CN117513740A
CN117513740A CN202311775052.1A CN202311775052A CN117513740A CN 117513740 A CN117513740 A CN 117513740A CN 202311775052 A CN202311775052 A CN 202311775052A CN 117513740 A CN117513740 A CN 117513740A
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China
Prior art keywords
template
shear wall
stepping
templates
stair
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CN202311775052.1A
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Chinese (zh)
Inventor
刁红国
卢艺欣
王新泉
李枭
陈智攀
裘欣锐
白雨桐
江子健
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Hangzhou City University
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Hangzhou City University
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Priority to CN202311775052.1A priority Critical patent/CN117513740A/en
Publication of CN117513740A publication Critical patent/CN117513740A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06—Falsework, 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
    • E04G13/062—Falsework, 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/001—Corner fastening or connecting means for forming or stiffening elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

The invention relates to a cast-in-situ stair formwork system and a construction method, comprising the following steps: the system comprises a stairway template system without a shear wall, a stairway template system with a shear wall and a bottom die supporting system; the stairway template system without the shear wall comprises a bottom template, side templates, reinforcing wooden wedges, a pull plate, a triangular bottom block, reinforcing side templates and a bidirectional pull rod. The beneficial effects of the invention are as follows: the stepping templates at all levels are connected into a whole through the pull plate, so that the stability of the stepping templates in the concrete pouring process is improved; the side templates are externally provided with a reinforced side template and a quick-release lock pin, and the side templates can be propped against after being oppositely pulled and screwed, so that the side templates are further prevented from being laterally deformed in the concrete pouring process; the shear wall is skillfully utilized to reserve a screw hole mounting bracket and a unidirectional pull rod, a stepping template is suspended and fixed, and a side template is reinforced to prevent lateral movement in the pouring process; the method is suitable for stair formwork construction with different heights and sizes, and ensures the stability and reliability of the whole stair formwork system.

Description

Cast-in-situ stair formwork system and construction method
Technical Field
The invention belongs to the field of house construction, and particularly relates to a cast-in-situ stair formwork system and a construction method.
Background
Stairs are important structures in building construction, are the most common vertical channel in building engineering projects, and are very common in various buildings. Although elevators are becoming popular in modern society, conventional stairways are still in an important position in a plurality of emerging building structures with advantages of safety and convenience, and requirements of traffic running, evacuation, fire prevention and the like are met. In structural analysis, the plate type stairs are usually analyzed according to the flexural members, so that the plate type stairs not only have good flexural working performance, but also have the characteristics of convenience, rapidness and high safety, and become the most common vertical traffic channel in the current construction engineering field.
The stairs are composed of continuous stairs, rest platforms, enclosure components and the like. Compared with the beam plate column structure, the stair has complex modeling, and the construction speed severely restricts the acceptance of the subsection and the arrangement of the subsequent working procedures. For cast-in-situ stairway, the phenomena of skew, sinking or shifting of the tread template, different tread template sizes and the like are easy to occur in construction, so that the stairway tread after casting is easy to have quality problems of section deformation, size deviation exceeding a standard allowable value and the like, and the construction of subsequent procedures is influenced. Therefore, the system stability and the assembly and disassembly convenience of the cast-in-situ stair template are one of key influence factors, so that the occurrence probability of problems such as missing angles, uneven deformation and the like is determined, and the overall cast-in-situ forming quality of the stair is influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a cast-in-situ stair formwork system and a construction method
The cast-in-situ stair formwork system comprises a stairway formwork system without a shear wall, a stairway formwork system with a shear wall and a bottom die supporting system; the stairway template system without the shear wall comprises a bottom template, side templates, reinforced wooden wedges, a pull plate, a triangular bottom block, a reinforced side template and a bidirectional pull rod;
in the stairway template system without the shear wall, a bottom template is arranged between an upper floor slab and a lower floor slab; the side templates are symmetrically arranged on two sides of the bottom template, and a plurality of clamping grooves are uniformly distributed and cut at the upper end of the side templates; a stepping template and a through rectangular wood are vertically arranged in the clamping grooves of the side templates at two sides; the reinforced wooden wedge is stuck and fixed in the clamping groove through the rectangular wooden clamp; the bracing plate is arranged in the middle of the stepping template, and the triangular bottom block is embedded and fixed below the bracing plate of the lower floor slab; the reinforced side templates are symmetrically arranged on the outer sides of the side templates and are fixedly connected through two-way pull rods; quick-release lock pins are arranged at two ends of the two-way pull rod.
When the shear wall exists, a reserved screw hole is formed in the shear wall, and the stair template system with the shear wall is fixed with the shear wall through the reserved screw hole;
the bottom die supporting system is used for supporting a stairway template system without a shear wall or a stairway template system with a shear wall.
Preferably, the stair template system with the shear wall comprises the shear wall, a transverse bracket, a vertical bracket, a bottom template, a side template, a stepping template, a through rectangular wood, a reinforced wood wedge, a pull plate and a unidirectional pull rod; in the stair template system with the shear wall, the transverse bracket is fixed in a reserved screw hole of the shear wall through a bolt; the upper end of the vertical support is welded on the transverse support, and the lower end of the vertical support is suspended with a stepping template and a through rectangular wood through bolts; one end of the unidirectional pull rod is anchored in a reserved screw hole of the shear wall through a quick-release nut, and the other end of the unidirectional pull rod is fixed on the outer side of the side template through a quick-release lock pin.
Preferably, the width of the bottom of the clamping groove is consistent with the thickness of the stepping template, the height of the vertical edge is consistent with the height of the stepping template, and the inclined edge is vertically distributed with the side wall of the side template.
Preferably, the lower end of the stepping template is consistent with the elevation of the upper end of the stepping template of the adjacent lower step; the bracing plate and each step of templates are fixed by iron nails, and the bottommost end of the bracing plate is propped against the surface of the lower floor plate.
Preferably, the bottom die supporting system comprises a triangular diagonal brace, a back ridge and square timber, wherein the triangular diagonal brace comprises two main loop bars; the two ends of the main loop bar are respectively connected with an upper screw and a lower screw through threads; a rotary handle is welded in the middle of the main loop bar; the top of the upper screw is provided with a jacking; the bottom of the lower screw is hinged with a base through a pin shaft, and the base is anchored with the ground through an anchor bolt; the triangular diagonal bracing adjusts the angle of the main loop bar through a pin shaft, and adjusts the lengths of the upper screw rod and the lower screw rod through a rotating handle; the back ribs are distributed below the bottom template at equal intervals along the length direction of the stairs; square timber is arranged between the back ridge and the jacking at equal intervals along the width direction of the stair.
Preferably, a reinforcement cage is further arranged between the bottom template and the stepping template.
The construction method of the cast-in-situ stair formwork system comprises the following steps:
step one, erecting a bottom template between an upper floor slab and a lower floor slab;
step two: installing a bottom die supporting system, and propping a bottom die plate through a plurality of triangular diagonal braces;
step three: installing a side template and binding a reinforcement cage;
step four: carrying out construction of the stepping template and the rectangular timber by using the clamping grooves on the side templates;
step five: reinforcing a stepping template; installing a bracing plate from top to bottom along each step of stepping template, and embedding and fixing the triangular bottom blocks below the bracing plates of the lower floor slab;
step six: reinforcing a side template; the sideform is tensioned and secured by rotating the quick release latch.
Preferably, the bottom die supporting system comprises a triangular inclined strut, the angle of the main loop bar is adjusted by the triangular inclined strut through a pin shaft, and the lengths of the two ends of the main loop bar are adjusted through a rotary handle; step two, arranging a back ridge below the bottom template along the length direction of the stair, and arranging square timber below the back ridge along the width direction of the stair; according to the design position and the size of the stairs, a plurality of triangular diagonal bracing are installed: adjusting the inclination angle of the main loop bar and fixing; and rotating the rotary handle, and synchronously adjusting the lengths of the upper screw and the lower screw at the two ends of the main loop bar until the square timber is jacked.
Preferably, when no shear wall exists, in the fourth step, each step of step templates are sequentially arranged in the clamping grooves on the side templates and extend outwards for a certain distance; then the through rectangular wood stretches across the side templates and is attached to the outer sides of the stepping templates, and finally the reinforced wood wedges are plugged into the clamping grooves to be fastened; and step six, sequentially installing a reinforced side template and a bidirectional pull rod, and oppositely pulling and fixing the side templates at two sides of the stair through rotating the quick-release lock pin.
Preferably, when the shear wall is arranged, in the fourth step, a transverse bracket, a vertical bracket, a stepping template and a through rectangular timber are sequentially arranged; one end of the stepping template and one end of the through rectangular wood are arranged in the clamping groove on the side template, the other end of the through rectangular wood is arranged below the vertical support, and finally the reinforced wood wedge is plugged into the clamping groove to be fastened; and step six, installing a unidirectional pull rod by utilizing a screw hole reserved in shear wall construction, anchoring one end of the unidirectional pull rod by adopting a quick-release nut after penetrating through the screw hole, and tensioning and fixing a side template at the outer side of the stair by rotating a quick-release lock pin at the other end of the unidirectional pull rod.
The beneficial effects of the invention are as follows:
1) According to the invention, a stair template system without a shear wall is developed, all levels of stair templates are connected into a whole through the pull plates, so that the stability of the stair templates in the concrete pouring process is improved; the side templates are reinforced and the locking pins are quickly detached through the installation of the outside of the side templates, and the side templates can be propped against after being tightly pulled and screwed, so that the side templates are further prevented from being laterally deformed in the concrete pouring process.
2) The invention develops a stair template system with a shear wall, which skillfully utilizes a reserved screw hole mounting bracket of the shear wall and a unidirectional pull rod, wherein the reserved screw hole mounting bracket is used for hanging and fixing a stepping template, and the unidirectional pull rod is used for reinforcing a side template to prevent lateral movement in the pouring process.
3) The invention develops a bottom die supporting system, and the triangular diagonal bracing with the structures of the rotary handle, the pin shaft and the like is suitable for stair formwork construction with different heights and sizes, so that the stability and the reliability of the whole stair formwork system are ensured.
Drawings
FIG. 1 is a side view of a shear wall-less stair form system and a counter-form support system of the present invention.
Fig. 2 is a top view of a shear wall-free stair template system of the present invention.
Fig. 3 is a detailed view of the area a in fig. 1.
Fig. 4 is an exploded view of the structures of fig. 3.
FIG. 5 is a schematic view of the quick release latch of the present invention.
FIG. 6 is a schematic view of a stair form system with shear walls according to the present invention.
Fig. 7 is a schematic view of a cast-in-place stair reinforcement cage according to the present invention.
In the figure: the formwork comprises a bottom formwork 1, side formworks 2, a stepping formwork 3, a through rectangular timber 4, a reinforced timber wedge 5, a bracing plate 6, a triangular bottom block 7, a reinforced side formwork 8, a bidirectional pull rod 9, a shear wall 10, a transverse support 11, a vertical support 12, a unidirectional pull rod 13, a triangular diagonal bracing 14, a main loop bar 141, an upper screw 142, a lower screw 143, a rotary handle 144, a jacking 145, a base 146, a pin 147, an anchor bolt 148, a back edge 15, a square timber 16, an upper floor 17, a lower floor 18, a clamping groove 19, a quick-release lock pin 20, a bolt 21, a screw hole 22, a quick-release nut 23 and a steel bar framework 24.
Detailed Description
The invention is further described below with reference to examples. The following examples are presented only to aid in the understanding of the invention. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present invention without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Example 1
As an embodiment, this kind of cast-in-place stair formwork system, characterized by: comprises a stairway template system without a shear wall and a bottom die supporting system.
The stairway template system without the shear wall comprises a bottom template 1, side templates 2, a stepping template 3, a through long square timber 4, a reinforced timber wedge 5, a bracing plate 6, a triangular bottom block 7, a reinforced side template 8 and a bidirectional pull rod 9. Wherein the bottom template 1 is arranged between an upper floor 17 and a lower floor 18; the side templates 2 are symmetrically arranged on two sides of the bottom template 1, and a plurality of clamping grooves 19 are uniformly distributed and cut at the upper end of the side templates; the stepping templates 3 and the through long square timber 4 are vertically arranged in the clamping grooves 19 of the side templates 2 at the two sides; the reinforced wooden wedge 5 is tightly stuck to the through rectangular wooden 4 and is clamped in the clamping groove 19; the brace plate 6 is arranged in the middle of the stepping template 3, and the lowest end of the brace plate is propped against the surface of the lower floor 18; the triangular bottom block 7 is embedded and fixed below the bracing plate 6 of the lower floor slab 18; the reinforcing side templates 8 are symmetrically arranged on the outer sides of the side templates 2 and are fixedly connected through bidirectional pull rods 9; quick release locking pins 20 are symmetrically arranged at two ends of the bidirectional pull rod 9.
The bottom die supporting system comprises a triangular diagonal brace 14, a back edge 15 and square timber 16. The triangular diagonal bracing 14 comprises a main loop bar 141, an upper screw rod 142, a lower screw rod 143, a rotary handle 144, a jacking 145 and a base 146; the upper screw rod 142 and the lower screw rod 143 are respectively embedded at two ends of the main loop bar 141 through threads; the rotary handle 144 is welded in the middle of the main loop bar 141; the jacking 145 is arranged at the top of the upper screw 142; the base 146 is hinged at the bottom of the lower screw 143 through a pin 147 and is anchored with the ground through an anchor bolt 148; the back ribs 15 are distributed and arranged below the bottom template 1 at equal intervals along the length direction of the stairs; the square timber 16 is arranged between the back ridge 15 and the jacking 145 at equal intervals along the width direction of the stair.
The width of the bottom of the clamping groove 19 is consistent with the thickness of the stepping template 3, the height of the vertical edge is consistent with the height of the stepping template 3, and the inclined edge is vertically distributed with the side wall of the side template 2. The lower end of the stepping template 3 is identical with the elevation of the upper end of the adjacent lower-stage stepping template 3.
The brace plates 6 are fixed with each step of templates 3 through iron nails, and all the step templates 3 are connected together from top to bottom. The quick-release lock pin 20 can be flexibly mounted and dismounted on the unidirectional pull rod 13 by rotating.
The angle of the main loop bar 141 can be arbitrarily adjusted by the triangular diagonal brace 14 through the pin 147, and the lengths of the upper screw 142 and the lower screw 143 can be arbitrarily adjusted by the knob 144.
A reinforcement cage 24 is also arranged between the bottom template 1 and the stepping template 3.
Example two
As another embodiment, the present embodiment provides, based on the first embodiment, that when the shear wall 10 is present, the cast-in-place stair formwork system includes a shear wall stair formwork system.
The stair template system with the shear wall comprises the shear wall 10, a transverse bracket 11, a vertical bracket 12, a bottom template 1, a side template 2, a stepping template 3, a through rectangular wood 4, a reinforced wood wedge 5, a brace plate 6 and a unidirectional pull rod 13. Wherein the transverse bracket 11 is fixed in a reserved screw hole 22 of the shear wall 10 through a bolt 21; the upper end of the vertical support 12 is welded on the transverse support 11, and the lower end of the vertical support is hung on the stepping template 3 and the through rectangular wood 4 through bolts 21; one end of the unidirectional pull rod 13 is anchored in a reserved screw hole 22 of the shear wall 10 through a quick-release nut 23, and the other end of the unidirectional pull rod is fixed on the outer side of the side template 2 through a quick-release lock pin 20.
The quick release lock pin 20 and the quick release nut 23 can be flexibly mounted and dismounted on the unidirectional pull rod 13 by rotation.
It should be noted that, in this embodiment, the same or similar parts as those in the first embodiment may be referred to each other, and will not be described in detail in this application.
Example III
As another embodiment, the third embodiment provides a cast-in-situ stair formwork construction method without a shear wall on the basis of the first embodiment.
Step one: and (5) processing the template. According to the step size of the standard layer stairs in the design drawing, the size of the V-shaped clamping groove 19 of the side template 2 is determined, and the bottom template 1 and the side template 2 are processed according to the lofting drawing. The template material in the present invention may preferably be a fir template.
And (5) installing a bottom template. The floor form 1 is erected obliquely between the upper floor 17 and the lower floor 18.
Step two: and installing a bottom die supporting system. 50mm multiplied by 100mm square timber is taken as the back ridge 15 to be distributed below the bottom template 1 at equal intervals along the length direction of the stairs, and 50mm multiplied by 30mm square timber 16 is distributed below the back ridge 15 at equal intervals along the width direction of the stairs. According to the design position and the size of the stairs, 2 triangular diagonal bracing 14 are respectively arranged along the length and the width direction of the stairs: the base 146 is anchored with the ground through the anchor bolt 148, the inclination angle of the main loop bar 141 is adjusted to a proper position, and the pin shaft 147 is fastened; the rotary handle 144 is rotated, and the lengths of the upper screw rod 142 and the lower screw rod 143 are synchronously adjusted until the jacking 145 jacks the square timber 16.
Step three: side forms 2 are symmetrically installed at both sides of the bottom form 1, and then a reinforcement cage 24 is bound in the form, as shown in fig. 7.
Step four: and installing a stepping template. Each step of step template 3 is sequentially arranged in the clamping groove 19 on the side template 2 and extends outwards for a certain distance; the through rectangular wood 4 is crossed across the side templates 2 and is clung to the outer sides of the stepping templates 3, and finally the reinforced wood wedges 5 are plugged into the clamping grooves 19 to be fastened. And a layer of release agent is uniformly coated on the inner surfaces of the bottom template 1, the side templates 2 and the stepping template 3.
Step five: reinforcing the tread template. The stay plate 6 is arranged from top to bottom along each step of step template 3 until the stay plate 6 is abutted against the lower floor 18, the stay plate 6 is fixed at the top of the step template 3 by adopting iron nails, and the triangular bottom block 7 is embedded and fixed below the stay plate 6 of the lower floor 18 and is used for supporting the step template 3 at the lowest level.
Step six: and reinforcing the side templates. And a reinforcing side template 8 and a bidirectional pull rod 9 are sequentially installed: after the bidirectional pull rod 9 penetrates through the side templates 2 and the reinforced side templates 8, the quick-release lock pins 20 are symmetrically installed, and the quick-release lock pins 20 are rotated to pull the side templates 2, so that the vertical state of the side templates is ensured in the subsequent concrete pouring process.
Example IV
As another embodiment, the fourth embodiment provides a construction method of the cast-in-situ stair formwork when the shear wall 10 is provided on the basis of the second and third embodiments.
Step one: and (5) processing the template. And determining the size of the clamping groove 19 of the side template 2 according to the step size of the standard layer stair in the design drawing, and processing the bottom template 1 and the side template 2 according to the lofting drawing.
And (5) installing a bottom template. The floor form 1 is erected obliquely between the upper floor 17 and the lower floor 18.
Step two: and installing a bottom die supporting system. The back ribs 15 are arranged below the bottom template 1 at equal intervals along the length direction of the stairs, and the square timber 16 is arranged below the back ribs 15 at equal intervals along the width direction of the stairs. According to the design position and the size of the stairs, a plurality of triangular diagonal braces 14 are arranged: the base 146 is anchored with the ground through the anchor bolt 148, the inclination angle of the main loop bar 141 is adjusted to a proper position, and the pin shaft 147 is fastened; the rotary handle 144 is rotated, and the lengths of the upper screw rod 142 and the lower screw rod 143 are synchronously adjusted until the jacking 145 jacks the square timber 16.
Step three: a side template 2 is arranged on the bottom template 1 at the side far away from the shear wall, and a reinforcement cage 24 is bound in the template.
Step four: and installing a stepping template. A transverse bracket 11, a vertical bracket 12, a stepping template 3 and a through rectangular timber 4 are sequentially arranged. One end of the stepping template 3 and one end of the through rectangular timber 4 are installed in the clamping groove 19 on the side template 2, the other end of the through rectangular timber is installed below the vertical support 12, and finally the reinforced timber wedge 5 is plugged into the clamping groove 19 to be fastened. And a layer of release agent is uniformly coated on the inner surfaces of the bottom template 1, the side templates 2 and the stepping template 3.
Step five: reinforcing the tread template. The pull strip plates 6 are arranged along each step of the step template 3 from top to bottom, and the iron nails are fixed.
Step six: and reinforcing the side templates. The one-way pull rod 13 is installed by utilizing a screw hole 22 reserved for the construction of the shear wall 10, one end of the one-way pull rod is anchored by adopting a quick-release nut 23 after penetrating through the screw hole 22, and the other end of the one-way pull rod is tensioned and fixed on the side template 2 outside the stair by rotating a quick-release lock pin 20.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by a difference from other embodiments, and identical and similar parts between the embodiments are referred to each other.

Claims (10)

1. A cast-in-situ stair formwork system is characterized in that: the system comprises a stairway template system without a shear wall, a stairway template system with a shear wall and a bottom die supporting system; the stairway template system without the shear wall comprises a bottom template, side templates, reinforced wooden wedges, a pull plate, a triangular bottom block, a reinforced side template and a bidirectional pull rod;
in the stairway template system without the shear wall, a bottom template is arranged between an upper floor slab and a lower floor slab; the side templates are symmetrically arranged on two sides of the bottom template, and a plurality of clamping grooves are uniformly distributed and cut at the upper end of the side templates; a stepping template and a through rectangular wood are vertically arranged in the clamping grooves of the side templates at two sides; the reinforced wooden wedge is stuck and fixed in the clamping groove through the rectangular wooden clamp; the bracing plate is arranged in the middle of the stepping template, and the triangular bottom block is embedded and fixed below the bracing plate of the lower floor slab; the reinforced side templates are symmetrically arranged on the outer sides of the side templates and are fixedly connected through two-way pull rods; quick-release lock pins are arranged at two ends of the two-way pull rod.
When the shear wall exists, a reserved screw hole is formed in the shear wall, and the stair template system with the shear wall is fixed with the shear wall through the reserved screw hole;
the bottom die supporting system is used for supporting a stairway template system without a shear wall or a stairway template system with a shear wall.
2. The cast-in-place stair formwork system as in claim 1, wherein: the stair template system with the shear wall comprises the shear wall, a transverse bracket, a vertical bracket, a bottom template, a side template, a stepping template, a through rectangular wood, a reinforced wood wedge, a pulling strip plate and a unidirectional pulling rod; in the stair template system with the shear wall, the transverse bracket is fixed in a reserved screw hole of the shear wall through a bolt; the upper end of the vertical support is welded on the transverse support, and the lower end of the vertical support is suspended with a stepping template and a through rectangular wood through bolts; one end of the unidirectional pull rod is anchored in a reserved screw hole of the shear wall through a quick-release nut, and the other end of the unidirectional pull rod is fixed on the outer side of the side template through a quick-release lock pin.
3. The cast-in-place stair formwork system as in claim 1, wherein: the width of the bottom of the clamping groove is consistent with the thickness of the stepping template, the height of the vertical edge is consistent with the height of the stepping template, and the bevel edge is vertically distributed with the side wall of the side template.
4. The cast-in-place stair formwork system as in claim 1, wherein: the lower end of the stepping template is identical to the elevation of the upper end of the stepping template of the adjacent lower-stage steps; the bracing plate and each step of templates are fixed by iron nails, and the bottommost end of the bracing plate is propped against the surface of the lower floor plate.
5. The cast-in-place stair formwork system as in claim 1, wherein: the bottom die supporting system comprises a triangular diagonal brace, a back edge and square timber, wherein the triangular diagonal brace comprises two main loop bars; the two ends of the main loop bar are respectively connected with an upper screw and a lower screw through threads; a rotary handle is welded in the middle of the main loop bar; the top of the upper screw is provided with a jacking; the bottom of the lower screw is hinged with a base through a pin shaft, and the base is anchored with the ground through an anchor bolt; the triangular diagonal bracing adjusts the angle of the main loop bar through a pin shaft, and adjusts the lengths of the upper screw rod and the lower screw rod through a rotating handle; the back ribs are distributed below the bottom template at equal intervals along the length direction of the stairs; square timber is arranged between the back ridge and the jacking at equal intervals along the width direction of the stair.
6. The cast-in-place stair formwork system as in claim 1, wherein: and a reinforcement cage is further arranged between the bottom template and the stepping template.
7. A method of constructing a cast-in-place stair formwork system as claimed in any one of claims 1 to 6 comprising the steps of:
step one, erecting a bottom template between an upper floor slab and a lower floor slab;
step two: installing a bottom die supporting system, and propping a bottom die plate through a plurality of triangular diagonal braces;
step three: installing a side template and binding a reinforcement cage;
step four: carrying out construction of the stepping template and the rectangular timber by using the clamping grooves on the side templates;
step five: reinforcing a stepping template; installing a bracing plate from top to bottom along each step of stepping template, and embedding and fixing the triangular bottom blocks below the bracing plates of the lower floor slab;
step six: reinforcing a side template; the sideform is tensioned and secured by rotating the quick release latch.
8. The construction method of the cast-in-situ stair formwork system as claimed in claim 7, wherein: the bottom die supporting system comprises a triangular diagonal bracing, wherein the triangular diagonal bracing adjusts the angle of the main loop bar through a pin shaft, and adjusts the lengths of the two ends of the main loop bar through a rotary handle; step two, arranging a back ridge below the bottom template along the length direction of the stair, and arranging square timber below the back ridge along the width direction of the stair; according to the design position and the size of the stairs, a plurality of triangular diagonal bracing are installed: adjusting the inclination angle of the main loop bar and fixing; and rotating the rotary handle, and synchronously adjusting the lengths of the upper screw and the lower screw at the two ends of the main loop bar until the square timber is jacked.
9. The construction method of the cast-in-situ stair formwork system as claimed in claim 7, wherein: when the shear wall is not arranged, in the fourth step, each step of step templates are sequentially arranged in the clamping grooves on the side templates and extend outwards for a certain distance; then the through rectangular wood stretches across the side templates and is attached to the outer sides of the stepping templates, and finally the reinforced wood wedges are plugged into the clamping grooves to be fastened; and step six, sequentially installing a reinforced side template and a bidirectional pull rod, and oppositely pulling and fixing the side templates at two sides of the stair through rotating the quick-release lock pin.
10. The construction method of the cast-in-situ stair formwork system as claimed in claim 7, wherein: when the shear wall is arranged, in the fourth step, a transverse bracket, a vertical bracket, a stepping template and a through rectangular wood are sequentially arranged; one end of the stepping template and one end of the through rectangular wood are arranged in the clamping groove on the side template, the other end of the through rectangular wood is arranged below the vertical support, and finally the reinforced wood wedge is plugged into the clamping groove to be fastened; and step six, installing a unidirectional pull rod by utilizing a screw hole reserved in shear wall construction, anchoring one end of the unidirectional pull rod by adopting a quick-release nut after penetrating through the screw hole, and tensioning and fixing a side template at the outer side of the stair by rotating a quick-release lock pin at the other end of the unidirectional pull rod.
CN202311775052.1A 2023-12-21 2023-12-21 Cast-in-situ stair formwork system and construction method Pending CN117513740A (en)

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