CN110630011A - Template reinforcing system for double shear walls at deformation joint and construction method thereof - Google Patents
Template reinforcing system for double shear walls at deformation joint and construction method thereof Download PDFInfo
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- CN110630011A CN110630011A CN201910987736.5A CN201910987736A CN110630011A CN 110630011 A CN110630011 A CN 110630011A CN 201910987736 A CN201910987736 A CN 201910987736A CN 110630011 A CN110630011 A CN 110630011A
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, 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
- E04G11/08—Forms, which are completely dismantled after setting of the concrete and re-built for next pouring
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0655—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts
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- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention discloses a formwork reinforcing system for a double-shear wall at a deformation joint and a construction method of the formwork reinforcing system. The method comprises the following steps of constructing a shear wall on one side of a deformation joint firstly during construction, hoisting and splicing an outer template and an inner template on two sides of the shear wall to be cast respectively, installing PVC wall penetrating pipes in reserved holes corresponding to the upper levels of the two templates, installing one-way self-tightening pair pull rods through the PVC wall penetrating pipes, fastening the pull rods and reinforcing steel bars under the combined action of the pull rods, pouring concrete between the two templates, removing the templates after the concrete is solidified, and constructing the shear wall on the other side of the deformation joint. The invention can be suitable for the construction of the double-shear wall at all deformation joints (anti-seismic joints, settlement joints and expansion joints) which are larger than or equal to 100mm, has the advantages of quick construction, convenient assembly and disassembly, low cost, repeated use of a reinforcing system and good forming effect of the concrete column body.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a formwork reinforcing system for a double-shear wall at a deformation joint and a construction method thereof.
Background
With the rapid development of science and technology, high-rise buildings and super high-rise buildings are widely applied to industrial and civil buildings, shear wall and frame shear wall structures are very commonly applied to high-rise structures, and deformation joints arranged between the shear walls are common in the high-rise buildings. The setting interval of movement joint (antidetonation seam, settlement joint, expansion joint) generally is 200 and supplyes 500mm, and the operating surface is narrow and small, leads to the construction degree of difficulty of movement joint structure very big.
When the formwork of the double-shear wall at the deformation joint is reinforced, the traditional construction method mainly comprises the steps that after the shear wall on one side is constructed firstly, the polystyrene board is often filled in the deformation joint of 500mm in the construction process of the shear wall on the other side, time and labor are wasted, the polystyrene board is easy to deform, the construction quality is not easy to control, the construction period is long, in addition, the polystyrene board cannot be disassembled or cannot be disassembled cleanly, the resource waste is caused invisibly, and the construction cost is increased.
Disclosure of Invention
In view of the disadvantages pointed out in the background art, the invention provides a formwork reinforcing system for a double-shear wall at a deformation joint and a construction method thereof, and aims to solve the problems in the prior art in the background art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a template reinforcement system for a double-shear wall at a deformation joint, which comprises a splicing template, template shaping fasteners, a one-way self-tightening pair pull rod piece and a reinforcing steel bar reinforcing rod piece, wherein the splicing template comprises a splicing outer template arranged at one side of the shear wall to be poured at the deformation joint and a splicing inner template arranged at one indoor side of the shear wall to be poured, a secondary keel batten a and a main keel steel pipe a are arranged on the splicing outer template and close to the deformation joint, a secondary keel batten b and a main keel steel pipe b are arranged on the splicing inner template and close to the indoor side, reserved holes are formed in the splicing outer template between the two main keel steel pipes b, reserved holes are also formed in the splicing outer template corresponding to the reserved holes in the splicing inner template horizontally, and PVC wall penetrating pipes are connected in the reserved holes corresponding to the splicing outer template and the splicing inner template horizontally; the template shaping fastener comprises a steel plate, a screw rod a, a steel pipe reinforcing clamp a and a fastening nut a, one end of the screw rod a is welded on the steel plate, the other end of the screw rod a penetrates through the spliced outer template and then is positioned between the two main keel steel pipes a, the steel plate is clamped on one side, to be cast, of the spliced outer template, the steel pipe reinforcing clamp a for fixing the main keel steel pipes a is arranged at the outer end of the screw rod a, and the steel pipe reinforcing clamp a is fixed through the fastening nut a; the reinforcing steel bar reinforcing rod piece comprises reinforcing steel bars; the one-way self-tightening opposite pull rod piece comprises a screw rod b, a ferrule, a steel pipe reinforcing clamp b and a fastening nut b, the ferrule is welded at one end of the screw rod b, reinforcing steel bars vertically penetrate into the ferrule, the steel pipe reinforcing clamp b for fixing the main keel steel pipe b is arranged at the other end of the screw rod b after penetrating out of the PVC wall penetrating pipe, and the steel pipe reinforcing clamp b is fixed through the fastening nut b.
Preferably, one end of the reinforcing steel bar is provided with a hook, and the hook is clamped on the main keel steel pipe a at the upper end of the splicing outer formwork.
Preferably, the ferrule is in a U-like shape, and two free ends of the U-like shape are welded to one end of the screw b.
The invention further provides a construction method of the template reinforcing system for the double shear wall at the deformation joint, which comprises the following steps:
step 1
Manufacturing a template shaping fastener, a one-way self-tightening counter-pull rod piece and a reinforcing steel bar reinforcing rod piece, wherein the template shaping fastener comprises a steel plate, a screw rod a, a steel pipe reinforcing clamp a and a fastening nut a, and one end of the screw rod a is welded on the steel plate; the one-way self-tightening opposite pull rod piece comprises a screw rod b, a ferrule, a steel pipe reinforcing clamp b and a fastening nut b, wherein the ferrule is welded at one end of the screw rod b; the reinforcing steel bar reinforcing rod piece comprises reinforcing steel bars;
step 2
Template splicing is carried out according to the height and the width of a deformation joint, a spliced outer template is manufactured, a secondary keel batten a and a main keel steel pipe a are nailed on the spliced outer template, reserved holes are formed in the spliced outer template according to the positions of the secondary keel batten a and the main keel steel pipe a after nailing is finished, template shaping fasteners are installed at intervals in the longitudinal direction with the reserved holes, the free end of a screw rod a is inserted into the spliced outer template at the position between the two main keel steel pipes a and penetrates out of the two main keel steel pipes a, the outer sides of the two main keel steel pipes a are fixed by arranging a steel pipe reinforcing clip a on the screw rod a, and the steel pipe reinforcing clip a is fixed by a fastening nut a;
step 3
Manufacturing a spliced inner template, forming reserved holes in the spliced inner template according to the positions of the reserved holes in the spliced outer template, and nailing a secondary keel batten b and a main keel steel pipe b on the spliced inner template, wherein the reserved holes are positioned between the two main keel steel pipes b;
step 4
After the shear wall steel bars are bound and checked, hoisting the spliced outer template to one side of the shear wall to be cast at the deformation joint by using a tower crane, hoisting the spliced inner template to the indoor side of the shear wall to be cast, and installing PVC wall penetrating pipes in reserved holes horizontally corresponding to the spliced outer template and the spliced inner template; then inserting the free end of the screw rod b from the outer side of the reserved hole on the splicing outer template, and penetrating the free end of the screw rod b out of the space between the two main keel steel tubes b of the splicing inner template after passing through the PVC wall penetrating tube; then, penetrating reinforcing steel bars into the ferrules of the longitudinal rows from top to bottom, fixing the outer sides of the steel tubes b of the two main keels through steel tube reinforcing clips b arranged on the screw rods b, and finally, arranging fastening nuts b at the outer ends of the screw rods b to tighten the reinforcing steel bars and fix the steel tube reinforcing clips b;
step 5
And pouring concrete between the splicing outer formwork and the splicing inner formwork, removing the formworks according to the sequence of firstly supporting and then removing the concrete after the concrete is solidified, and then repeating the steps to construct the shear wall on the other side of the deformation joint.
Preferably, the lower opening gap of the spliced outer template is adhered to the lower wall body by double faced adhesive tape in advance, so that the lower opening of the spliced outer template and the lower wall body are tightly sealed, and slurry leakage is prevented; the lower opening gap of the splicing inner template adopts 1: 3, the cement mortar is tightly blocked to prevent slurry leakage, and the mortar is not allowed to enter the wall body.
Preferably, the two ends of the PVC wall penetrating pipe are flush with the two outer sides of the splicing outer formwork and the splicing inner formwork.
Preferably, the straight diameter of the PVC through-wall pipe is 50 mm.
Compared with the defects and shortcomings of the prior art, the invention has the following beneficial effects:
the reinforcing system for the deformation joint at the double shear wall can shorten the construction period, can be repeatedly used for multiple times, reduces the construction cost, has relatively wide application range, and can be suitable for the construction of concrete structures on two sides of all the deformation joints with the thickness of 100 mm. The reinforcing system has the advantages of simple structure, easy manufacture, convenient assembly and disassembly, high construction industrialization degree, convenient use, smooth surface of construction concrete, impact resistance and high strength, does not occupy construction machinery during assembly, can be assembled and operated by 2-3 persons, and reduces the labor cost. The concrete column body poured by the mould has good forming effect and completely meets the requirements of fair-faced concrete.
Drawings
Fig. 1 is a schematic structural diagram of a formwork reinforcing system for a double shear wall at a deformation joint according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a splicing template provided in an embodiment of the present invention.
Fig. 3 is a schematic structural view of a template-type fastener provided by an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a one-way self-tightening pair pulling rod provided by the embodiment of the invention.
FIG. 5 is a schematic diagram illustrating the use of a reinforcement system provided by an embodiment of the present invention.
In the figure: 1-splicing an outer template, 2-splicing an inner template, 3-secondary keel batten a, 4-secondary keel batten b, 5-main keel steel pipe a, 6-main keel steel pipe b, 7-steel plate, 8-screw rod a, 9-steel pipe reinforcing clamp a, 10-fastening nut a, 11-reinforcing steel bar, 12-screw rod b, 13-ferrule, 14-steel pipe reinforcing clamp b, 15-fastening nut b, 16-PVC wall penetrating pipe and 17-reserved hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1, the formwork reinforcing system for the double-shear wall at the deformation joint comprises a splicing formwork, a formwork shaping fastener, a one-way self-tightening pair pull rod piece and a reinforcing steel bar reinforcing rod piece.
The splicing template comprises a splicing outer template 1 arranged at one side of the shear wall to be cast at the deformation joint and a splicing inner template 2 arranged at one indoor side of the shear wall to be cast, a secondary keel batten a3 and a main keel steel pipe a5 are arranged on one side, close to the deformation joint, of the splicing outer template 1, a secondary keel batten b4 and a main keel steel pipe b6 are arranged on one side, close to the indoor side, of the splicing inner template 2, a reserved hole 17 (refer to figure 2) is arranged on the splicing outer template 2 between the two main keel steel pipes b6, the splicing outer template 1 horizontally corresponding to the reserved hole 17 in the splicing inner template 2 is also provided with the reserved hole 17, the reserved hole 17 horizontally corresponding to the splicing outer template 1 and the splicing inner template 2 is connected with a PVC (polyvinyl chloride) wall penetrating pipe 16, the diameter of the PVC wall penetrating pipe 16 is preferably 50mm, and the distance between the splicing outer template 1 and the splicing inner template 2 is preferably 450mm (namely the length of the PVC wall penetrating pipe 16 in the middle).
The template shaping fastener comprises a steel plate 7, a screw a8, a steel pipe reinforcing clip a9 and a fastening nut a10, and referring to fig. 3, the size of the steel plate 7 is 100mm x 100mm x 8mm, the screw a8 is a phi 14 screw, the length is preferably 200mm, one end of the screw a8 is welded on the steel plate 7, the other end of the screw a8 penetrates through the lateral expansion joint direction to be poured of the spliced outer template 1, the steel plate 7 is clamped on the side to be poured of the spliced outer template 1, the outer end of the screw a8 penetrates out and then is located between two main keel steel pipes a5, the outer end of the screw a8 is provided with a steel pipe reinforcing clip a9, the steel pipe reinforcing clip a9 is clamped on the outer side (namely, the side of the expansion joint of the main keel steel pipe a 5), and the steel.
The reinforcing bar reinforcing rod is processed by reinforcing steel bars 11 with the diameter phi of 20, and one end of the reinforcing bar reinforcing rod is bent into a hook shape, so that the steel bars are prevented from falling off when the formwork is reinforced.
The unidirectional self-tightening opposite pull rod piece comprises a screw rod b12, a ferrule 13, a steel pipe reinforcing clip b14 and a fastening nut b15, and referring to fig. 4, the ferrule 13 can be processed into a U-shaped component with the width of 230mm by adopting a steel bar with the diameter of phi 14, and two free ends of the U-shaped component are welded at one end of the screw rod b 12. The reinforcing steel bar 11 vertically penetrates into the ferrule 13 from top to bottom, the hook is clamped on a main keel steel tube a5 at the upper end of the splicing outer formwork 1, the other end of the screw b12 penetrates out of the PVC wall penetrating tube 16, a steel tube reinforcing clamp b14 is arranged on the screw b12 and used for fixing the reinforcing steel bar from the indoor side of the main keel steel tube b6, and the steel tube reinforcing clamp b14 is fixed through a fastening nut b 15.
Example 2
A construction method of a formwork reinforcing system for a double-shear wall at a deformation joint comprises the following steps:
step 1
Form-setting fasteners, one-way self-tightening tie-rods and rebar reinforcement bars were made as required in example 1.
Step 2
According to the height and the width of the deformation joint, high-quality mirror-surface wood-rubber plates are used for splicing the templates, the templates are effectively spliced, a spliced outer template 1 is manufactured, and special treatment needs to be carried out on the splicing joints in order to prevent the slurry leakage phenomenon between the splicing joints of the large template. The secondary keel batten a3 and the main keel steel tube a5 are nailed on the splicing outer template 1, 1 secondary keel batten is arranged at the splicing joint when the template and the secondary keel are nailed, and the secondary keel battens can be torn open and covered when being spliced. The lap joint of the template on the secondary keel batten is more than or equal to 30 mm. After the nailing is finished, a reserved hole 17 is formed in the spliced outer formwork 1 according to the positions of the secondary keel batten a3 and the main keel steel pipe a5 and used for placing the PVC through-wall pipe 16. And template shaping fasteners are arranged at intervals in the longitudinal direction with the reserved holes 17, and are fastened through steel pipe reinforcing clips a9 and fastening nuts a10, so that the adjustment and the reinforcement are in place.
Step 3
And manufacturing a spliced inner template 2, arranging a reserved hole 17 on the spliced inner template 2 according to the position of the reserved hole on the spliced outer template 1, and nailing a secondary keel batten b4 and a main keel steel pipe b6 on the spliced inner template 2, wherein the reserved hole 17 is positioned between two main keel steel pipes b 6.
Step 4
After the shear wall steel bars are bound, placing concrete precast blocks, after the acceptance of a supervision engineer is qualified, hoisting the spliced outer template 1 to one side of the shear wall to be cast at a deformation joint by using a tower crane, wherein a lower opening gap of the spliced outer template 1 is adhered to a lower wall body by using a double faced adhesive tape in advance, so that the lower opening of the spliced outer template 1 and the lower wall body are tightly sealed, and slurry leakage is prevented. Hoisting the splicing inner template 2 to the indoor side of the shear wall to be cast, wherein the lower opening gap of the splicing inner template 2 adopts 1: 3, the cement mortar is tightly blocked to prevent slurry leakage, and the mortar is not allowed to enter the wall body. The PVC through-wall pipe 16 is installed in the reserved hole 17 horizontally corresponding to the splicing outer formwork 1 and the splicing inner formwork 2 (the key is realized in this step, the completion of subsequent work is directly influenced), and the two ends of the PVC through-wall pipe 16 are flush with the two outer sides of the splicing outer formwork 1 and the splicing inner formwork 2. Then inserting the free end of the screw b12 from the outer side of the reserved hole 17 on the splicing outer template 1, and penetrating the free end through the PVC wall penetrating pipe 16 and between the two main keel steel pipes b6 of the splicing inner template 2; after a row of unidirectional self-tightening tie rods penetrate between the outer splicing formwork 1 and the inner splicing formwork 2, reinforcing steel bars 11 penetrate into the ferrules 13 of the longitudinal rows from top to bottom, and then the unidirectional self-tightening tie rods are fastened until the adjustment and the reinforcement are in place.
Step 5
Concrete is poured between the splicing outer formwork 1 and the splicing inner formwork 2, after the concrete is solidified, the formwork is dismantled according to the sequence of firstly supporting and then dismantling, the horizontal fastening piece of the deformation joint shear wall formwork is dismantled firstly, then the deformation joint shear wall is dismantled and is close to the formwork on one indoor side, and then the top of the shaping formwork is slightly pried by a crowbar, so that the formwork is separated from the concrete gradually. Hoisting the shaped template out safely by using a tower crane, flatly placing the shaped template after being hoisted out, maintaining in time, and coating a release agent; and repeating the steps to construct the shear wall on the other side of the deformation joint.
In the construction process, two sides of the deformation joint are divided into two single construction sections with flowing water respectively, the left side is a flowing water section, the construction of the flowing water section 1 is carried out after the normal construction of the two-side multi-layer plate split bolts to 2 layers is firstly carried out, namely after the concrete pouring of the layer 2 is finished, and the construction schematic diagram is shown in fig. 5. The right side is that 2 flowing water sections are under construction again, can reduce the template like this and demolish the degree of difficulty to improve work efficiency. Before checking and accepting the perpendicularity of the deformation joint template, whether the section size of the deformation joint and the position of the deformation joint close to the indoor template are consistent with the positioning size (the size between the measuring template and the control line) or not is rechecked, if not, corresponding adjustment and calibration are needed, and after the adjustment, correction and rechecking of the perpendicularity of the deformation joint template are carried out until the rechecking specification requirement is met. The deformation joint shear wall concrete is poured in layers, the thickness of each layer is not more than 500mm, the height of the deformation joint shear wall is within 3m, and the deformation joint shear wall concrete can be directly poured on the wall top and is compacted through vibration; and when the height exceeds 3m, a string of cylinders is applied or a door opening is formed in the side face of the template, inclined chute is installed for subsection pouring and is vibrated to be compact, the height of each section is not more than 2m, and the door opening is sealed after each section is poured.
When the invention is constructed, the invention is considered according to a shear wall with the height of 3m and the length of 6m, and the invention comprises the following work types: the specific number of carpenters, welders, general workers, etc. can be referred to in Table 1.
TABLE 1 labor organization situation Table
| Serial number | Work species | Work content | Labor force |
| 1 | Carpenter's work | Form mounting and dismounting | 2 |
| 2 | Electric welder | Processing of shaped components | 1 |
| 3 | General worker | Matched construction | 1 |
During construction, the allowable deviation of the formwork installation and the inspection method are as shown in table 2.
TABLE 2 tolerance to template installation and method of verification
In the construction process, the embedded parts, the reserved holes and the reserved holes fixed on the template are not missed and need to be firmly installed, and the deviation is specified by referring to a table 3.
TABLE 3 allowable positional deviation of embedment, prepared hole and prepared hole
Note: when checking the position of the center line, it should be measured along the longitudinal and transverse directions, and the larger value is selected.
Example 3
The invention is applied to the construction of project 12# building of residential community of Wenqqu lake garden in Lanzhou new regionThe time of the work is as follows: 2016.06.12, completion time: 2018.03.03, building area: 33772.12m2The application quantity is as follows: the engineering structure is a shear wall structure, the overall length of the engineering is 79.9m, a deformation joint with the width of 300mm is designed in the middle, and shear walls are arranged on two sides of the deformation joint. The length of the deformation joint is 5.85m, and the height of the deformation joint is 98.7 m.
The cost in the construction process of the project is counted and investigated, and compared with two traditional construction methods, the traditional method 1 is that after one side of the shear wall is constructed according to a normal process, the other side of the shear wall is constructed, and the benzene plate is filled in the deformation joint. The traditional method 2 is to add the polystyrene board into the deformation joint in advance and pour the shear walls on the two sides simultaneously. The cost is statistically analyzed according to the layer height of 2.90m and the deformation joint length of 5.85m, and the result chart 4 shows that the method has remarkable economic benefit compared with the traditional method for reinforcing the double-shear wall template at the deformation joint.
TABLE 4 economic benefits of the traditional method and the invention in the construction of project # 12 building of Wenzhu lake garden residential district in Lanzhou New district
As can be seen from Table 4, compared with the traditional construction process, the construction method of the invention ensures the safety and the quality on the basis of shortening the construction period, can reduce the noise and the atmospheric pollution in the construction process, greatly reduces the consumption of materials such as polystyrene boards, reduces the construction waste generated by cleaning the polystyrene boards, saves the construction power consumption and obtains good economic and social benefits.
The invention also shows the following advantages in the construction process:
(1) simple structure, easy manufacture, convenient disassembly and assembly, high construction industrialization degree and smooth construction concrete surface.
(2) Large covering area, less splicing, no leakage of concrete and good toughness. The composite material has the advantages of impact resistance, high strength and high surface strength, can be repeatedly used for many times, does not occupy any construction machinery during assembly, and can be assembled and operated by 1-2 persons.
(3) The concrete column body poured by the mould has good forming effect and completely meets the requirements of fair-faced concrete. Because the traditional construction process uses the flexible material as a concrete forming template, the flexible material is greatly deformed in the construction process, the design size, the protective layer thickness and the like of the concrete cannot be effectively controlled, and quality accidents such as inconsistent protective layer thickness, unsatisfied surface flatness requirements and even rib leakage and the like easily occur on one side of the flexible material. The invention does not use flexible material as the template, and can well control the external dimension of the structure and the thickness of the protective layer of the steel bar.
(4) The construction progress is fast, the connecting piece of the template and the main keel and the one-way self-tightening device of the counter-pull screw rod are all welded according to design requirements before the construction of the main structure, and the connecting piece is only required to be transported to a construction part during construction and assembled on site. According to the actual situation on site, the cutting of the embedded steel pipe, the filling of the embedded hole and the cleaning of the polystyrene board are needed in the later stage of the traditional process, and the invention has obvious advantages under the comparison of the construction engineering quantity and the construction progress.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A template reinforcing system for a double-shear wall at a deformation joint is characterized by comprising a splicing template, template shaping fasteners, a one-way self-tightening counter-pull rod piece and a reinforcing rod piece, wherein the splicing template comprises a splicing outer template and a splicing inner template, the splicing outer template is installed on one side, to be poured, of the deformation joint, the splicing inner template is installed on one indoor side of the shear wall to be poured, a secondary keel batten a and a main keel steel pipe a are arranged on the splicing outer template and close to the deformation joint, a secondary keel batten b and a main keel steel pipe b are arranged on one indoor side of the splicing inner template, reserved holes are formed in the splicing outer template between the two main keel steel pipes b, reserved holes are also formed in the splicing outer template corresponding to the reserved holes in the splicing inner template horizontally, and PVC wall penetrating pipes are connected in the reserved holes in the splicing outer template and the splicing inner template horizontally corresponding to the reserved holes; the template shaping fastener comprises a steel plate, a screw rod a, a steel pipe reinforcing clamp a and a fastening nut a, one end of the screw rod a is welded on the steel plate, the other end of the screw rod a penetrates through the spliced outer template and then is positioned between the two main keel steel pipes a, the steel plate is clamped on one side, to be cast, of the spliced outer template, the steel pipe reinforcing clamp a for fixing the main keel steel pipes a is arranged at the outer end of the screw rod a, and the steel pipe reinforcing clamp a is fixed through the fastening nut a; the reinforcing steel bar reinforcing rod piece comprises reinforcing steel bars; the one-way self-tightening opposite pull rod piece comprises a screw rod b, a ferrule, a steel pipe reinforcing clamp b and a fastening nut b, the ferrule is welded at one end of the screw rod b, reinforcing steel bars vertically penetrate into the ferrule, the steel pipe reinforcing clamp b for fixing the main keel steel pipe b is arranged at the other end of the screw rod b after penetrating out of the PVC wall penetrating pipe, and the steel pipe reinforcing clamp b is fixed through the fastening nut b.
2. The formwork reinforcement system for a double shear wall at a deformation joint as claimed in claim 1, wherein one end of the reinforcing steel bar is provided with a hook, and the hook is clamped on the main keel steel pipe a at the upper end of the spliced outer formwork.
3. The formwork reinforcement system for a double shear wall at a deformation joint as claimed in claim 1, wherein the ferrule has a U-like shape, and both free ends of the U-like shape are welded to one end of the screw b.
4. A construction method of a formwork reinforcing system for a double-shear wall at a deformation joint is characterized by comprising the following steps:
step 1
Manufacturing a template shaping fastener, a one-way self-tightening counter-pull rod piece and a reinforcing steel bar reinforcing rod piece, wherein the template shaping fastener comprises a steel plate, a screw rod a, a steel pipe reinforcing clamp a and a fastening nut a, and one end of the screw rod a is welded on the steel plate; the one-way self-tightening opposite pull rod piece comprises a screw rod b, a ferrule, a steel pipe reinforcing clamp b and a fastening nut b, wherein the ferrule is welded at one end of the screw rod b; the reinforcing steel bar reinforcing rod piece comprises reinforcing steel bars;
step 2
Template splicing is carried out according to the height and the width of a deformation joint, a spliced outer template is manufactured, a secondary keel batten a and a main keel steel pipe a are nailed on the spliced outer template, reserved holes are formed in the spliced outer template according to the positions of the secondary keel batten a and the main keel steel pipe a after nailing is finished, template shaping fasteners are installed at intervals in the longitudinal direction with the reserved holes, the free end of a screw rod a is inserted into the spliced outer template at the position between the two main keel steel pipes a and penetrates out of the two main keel steel pipes a, the outer sides of the two main keel steel pipes a are fixed by arranging a steel pipe reinforcing clip a on the screw rod a, and the steel pipe reinforcing clip a is fixed by a fastening nut a;
step 3
Manufacturing a spliced inner template, forming reserved holes in the spliced inner template according to the positions of the reserved holes in the spliced outer template, and nailing a secondary keel batten b and a main keel steel pipe b on the spliced inner template, wherein the reserved holes are positioned between the two main keel steel pipes b;
step 4
After the shear wall steel bars are bound and checked, hoisting the spliced outer template to one side of the shear wall to be cast at the deformation joint by using a tower crane, hoisting the spliced inner template to the indoor side of the shear wall to be cast, and installing PVC wall penetrating pipes in reserved holes horizontally corresponding to the spliced outer template and the spliced inner template; then inserting the free end of the screw rod b from the outer side of the reserved hole on the splicing outer template, and penetrating the free end of the screw rod b out of the space between the two main keel steel tubes b of the splicing inner template after passing through the PVC wall penetrating tube; then, penetrating reinforcing steel bars into the ferrules of the longitudinal rows from top to bottom, fixing the outer sides of the steel tubes b of the two main keels through steel tube reinforcing clips b arranged on the screw rods b, and finally, arranging fastening nuts b at the outer ends of the screw rods b to tighten the reinforcing steel bars and fix the steel tube reinforcing clips b;
step 5
And pouring concrete between the splicing outer formwork and the splicing inner formwork, removing the formworks according to the sequence of firstly supporting and then removing the concrete after the concrete is solidified, and then repeating the steps to construct the shear wall on the other side of the deformation joint.
5. The construction method of the formwork reinforcing system for the double-shear wall at the deformation joint as claimed in claim 4, wherein the lower opening gap of the spliced outer formwork is adhered to the lower wall body by double faced adhesive tape in advance, so that the lower opening of the spliced outer formwork is tightly sealed with the lower wall body, and the lower opening gap of the spliced inner formwork is 1: 3, tightly plugging cement mortar.
6. The method for constructing a formwork reinforcement system for a dual shear wall at a deformation joint according to claim 4, wherein both ends of the PVC wall penetrating pipe are flush with both outer sides of the spliced outer formwork and the spliced inner formwork.
7. The method for constructing a formwork reinforcing system for a double shear wall at a deformation joint according to claim 6, wherein the PVC wall penetrating pipe has a straight diameter of 50 mm.
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| CN112459467A (en) * | 2020-10-26 | 2021-03-09 | 中铁建设集团有限公司 | Deformation joint wall formwork and cast-in-place shear wall construction method |
| CN113482328A (en) * | 2021-07-01 | 2021-10-08 | 广西建工集团控股有限公司 | Integral hoisting installation construction method for steel pipe template of outer shear wall |
| CN113585725A (en) * | 2021-08-31 | 2021-11-02 | 福建省世新工程营造有限公司 | Template for construction of deformation joint of shear wall structure, construction structure and construction method |
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