CN110552506A - multifunctional non-dismantling formwork construction method - Google Patents
multifunctional non-dismantling formwork construction method Download PDFInfo
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- CN110552506A CN110552506A CN201910854091.8A CN201910854091A CN110552506A CN 110552506 A CN110552506 A CN 110552506A CN 201910854091 A CN201910854091 A CN 201910854091A CN 110552506 A CN110552506 A CN 110552506A
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- steel
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- template
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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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 the field of building construction, in particular to a multifunctional disassembly-free formwork construction method, which comprises the following steps: measuring and paying off; building a steel bar supporting system; building a template supporting system and positioning a water stop steel plate; laying steel wire mesh sheets on the formwork support system; forming holes on the steel wire mesh according to the positions of the members penetrating through the template; laying steel bars; pouring concrete; and selecting whether to dismantle the formwork support system according to actual needs. The invention can form a supporting system meeting different requirements and completely meet the construction requirements of high formwork and large-volume concrete.
Description
Technical Field
The invention relates to the field of building construction, in particular to a multifunctional disassembly-free formwork construction method.
Background
in project construction, a plurality of construction parts are difficult to use traditional formworks, or the formworks after pouring are difficult to remove, so that great work and material waste is caused, and the requirements on low-cost, high-quality, convenient and fast formworks are met.
the non-dismantling template in the existing market has fewer types and certain use limitation. Due to the small market demand, suppliers are difficult to find, and most of the non-dismantling templates are difficult to transport and purchase.
How to make the non-dismantling template by using simple materials is the field explored by all large-scale building enterprises. Therefore, in view of the current situation, it is urgently needed to develop a multifunctional non-dismantling formwork construction method to overcome the defects in the current practical application.
Disclosure of Invention
the embodiment of the invention aims to provide a multifunctional disassembly-free formwork construction method to solve the problems in the background technology.
in order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a construction method of a multifunctional disassembly-free formwork comprises the following steps:
1) Measuring and paying off;
2) Building a steel bar supporting system;
3) Building a template supporting system and positioning a water stop steel plate: manufacturing a welded steel bar mesh between the inner side of the upright stanchion and the outer side of the side line of the template by adopting a steel bar bidirectional interval of 100-300 mm; under the condition that the water stop steel plate needs to be fixed, when the water stop steel plate vertically penetrates through the steel bar net, the cut steel bars are welded on the water stop steel plate, and meanwhile, the welding seam is fully welded;
4) Laying steel wire meshes on a formwork support system: selecting a proper steel wire mesh sheet according to the pressure of concrete on the template, fixing the steel wire mesh sheet on the inner side of the steel bar mesh sheet by using binding wires, and laying one or two layers of the steel wire mesh sheets;
5) forming holes on the steel wire mesh according to the positions of the members penetrating through the template;
6) Laying steel bars;
7) Pouring concrete: the concrete is poured in a layered mode, or a counter-pull screw supporting system with the space less than 400mm is added on the template to carry out rapid concrete pouring;
8) and selecting whether to dismantle the formwork support system according to actual needs.
as a further scheme of the invention: in the step 1), a template side line is popped up by a measurer according to an engineering drawing, and the required error is less than 3 mm.
as a further scheme of the invention: in the step 2), selecting a steel bar or channel steel as a supporting system according to the amount of the steel bars on the drawing; when the steel bar needs to penetrate through the formwork, the upright post positions of the steel bar supporting system are adjusted, so that the upright posts near the formwork are all arranged on the outer side edge line of the formwork, and the interval between the upright posts on the outer side edge line is ensured to be smaller than 1500 mm; and uniformly welding the floor sweeping rods of the supporting system at the lowest ends of the vertical rods.
As a further scheme of the invention: in the step 3), when the height of the template is more than 300mm and the length is more than 500mm, the diameter of the adopted steel bar is 6.5-12 mm; the thickness of the water stop steel plate is not less than 3 mm.
As a further scheme of the invention: in the step 4), the lapping length of the steel wire mesh sheets is not less than the length of two hole distances of the steel bar mesh sheets; when two layers of steel wire meshes are paved, the aperture of the outer layer of steel wire meshes is larger than that of the inner layer of steel wire meshes by more than 50 mm.
As a further scheme of the invention: in the step 4), the steel wire mesh is a galvanized steel wire mesh with the diameter of 0.2-1.5 mm and the aperture of 1-10 mm.
As a further scheme of the invention: in the step 5), the hole-opening tool adopts the same type of steel bar sharpening to manually punch holes on the steel wire mesh, and holes with the diameter larger than 35mm are subjected to reinforcement treatment.
As a further scheme of the invention: in the step 7), when concrete is cast in layers, the thickness of each layer is controlled to be 300mm, and the interval time between each layer is 3.5 hours; or pebbles with the diameter of 80mm fall onto the surface of the concrete from a height of 2m, and when the pebbles enter 1/4, the diameter of which is not more than that of the concrete part, the next layer of concrete is poured.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
The invention discloses a multifunctional disassembly-free formwork construction method, which adopts a relatively dense steel wire mesh and utilizes the tension of concrete to plug the concrete to form a formwork, a large amount of small bulges are formed on the surface of the formwork by a small amount of cement mortar penetrating through the steel wire mesh, the later concrete surface is favorably combined with other binders, the process is simple, the construction speed is high, the form of the formwork is flexible and changeable, and the support mode can be adjusted according to the actual condition; the steel wire mesh is combined with components such as reinforcing steel bars, battens, section steel, steel pipes and split screws in different environments to form a support system meeting different requirements, and the construction requirements of high formwork supporting and large-volume concrete are completely met.
Detailed Description
the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
description of the materials
1) The main materials are as follows:
a. Steel wire mesh sheet: selecting a galvanized steel wire mesh with the diameter of 0.2-1.5 mm and the aperture of 1-10 mm according to the height of the template;
b. Reinforcing steel bar net piece: when the height of the template is more than 300mm and the length is more than 500mm, a bidirectional welding reinforcing steel bar mesh with the diameter of the reinforcing steel bar of 6.5-12 mm and the distance of 100-300 mm is preferably selected as an auxiliary support system;
c. Section steel: when the height of the template is more than 1000mm, 10# channel steel is preferably adopted, other types of H-shaped steel, [ -shaped steel, L-shaped steel and the like can be selected according to the stress and different requirements, and the material is used for a large-scale disassembly-free template supporting system;
d. Steel pipe: the pipe material of the fastener type scaffold is preferably adopted according to the requirement;
e. wood block: the model is selected according to the requirement, and the specification of 40 × 80mm is adopted;
f. oppositely pulling the screw rod: when the height of the template is more than 500mm and the template is poured quickly at one time, a split screw supporting system is preferably adopted.
2) Auxiliary materials:
iron nails, iron wires, welding materials, wire scissors, a chevron-shaped piece, nuts and the like.
3) auxiliary equipment:
Hand held electric welders, toothless saws, gas welding, and the like.
Example 1
In the embodiment of the invention, a multifunctional disassembly-free formwork construction method comprises the following steps:
1) And (3) measurement and paying-off:
And popping up the side line of the template by a measurer according to the engineering drawing, wherein the required error is less than 3 mm.
2) Building a steel bar supporting system:
a) the reinforced concrete method comprises the following steps:
the steel bars or channel steel and the like are selected as a support system according to the using amount of the steel bars on a drawing, and the construction method of the conventional steel bar support system is described in a steel bar engineering construction manual, and the following two points of attention are emphasized when the steel bar support system is matched with a non-dismantling formwork:
Firstly, when the reinforcing bar need pass the template, should adjust the pole setting position of steel bar support system, make near template pole setting all set up on template outside sideline as far as possible, guarantee that the pole setting interval of outside sideline is less than 1500mm, can save the exempting from formwork support system steel quantity by the at utmost.
and secondly, the floor sweeping rods of the supporting system are uniformly welded at the lowest end of the vertical rod, so that waterproof construction is facilitated, and the cost of the steel bar cushion block is saved.
b) the preparation method of the plain concrete comprises the following steps:
This step is omitted when the concrete member does not require a rebar construction system.
3) Building a template supporting system and positioning a water stop steel plate:
a) The reinforced concrete method comprises the following steps:
between the inner side of the vertical rod and the outer side of the side line of the template, a welded steel bar mesh is manufactured by adopting the steel bar bidirectional interval of 100-300 mm, and the diameter of the steel bar is suitable for adopting the specification of 10 mm.
under the condition that the water stop steel plate needs to be fixed, when the water stop steel plate vertically penetrates through the steel bar net, the cut steel bar needs to be welded on the water stop steel plate, and meanwhile, a welding seam is fully welded (a spot welding mode cannot be adopted); the thickness of the water stop steel plate is not less than 3mm, if the thickness of the water stop steel plate is less than 3mm, the water stop steel plate should be timely contacted with related units to handle changes, and the reason is that steel materials with the thickness less than 3mm are easy to break through by current and difficult to weld.
b) the preparation method of the plain concrete comprises the following steps:
And a support system is arranged along the side line of the template, and the related method is consistent with that under the condition of reinforced concrete.
4) Laying steel wire meshes on a formwork support system:
according to the pressure of concrete on the formwork, a proper steel wire mesh is selected, the steel wire mesh is fixed to the inner side of the steel bar mesh by binding wires, and the specification of the steel bar mesh is selected and referred to as the following table 1.
TABLE 1
| Pressure intensity (map) | >0.01 | >0.02 | >0.03 | >0.04 | >0.05 | >0.06 |
| Steel wire mesh sheet steel wire diameter (mm) | 0.2 | 0.3 | 0.4 | 0.4 | 0.5 | 0.5 |
The lapping length of the steel wire mesh sheets is not less than the length of two hole distances (200-600 mm) of the steel bar mesh sheets.
In a humid environment, the difference between the laying time of the steel wire mesh sheets and the pouring time of concrete is not more than 5 days, and when the steel wire mesh sheets with the interval time of more than 5 days under a special condition, the diameter of steel wires must be correspondingly increased (grasped according to the actual condition on site). In a dry environment, the time intervals are preferably not different by more than 7 days.
Normally, only one layer of steel wire mesh is paved, when two layers of steel wire mesh need to be paved, the aperture of the outer layer of steel wire mesh is preferably larger than that of the inner layer of steel wire mesh by more than 50mm, and meanwhile, the mechanical checking calculation of the steel wire mesh is ensured to meet the requirement, and gaps are prevented from being generated when concrete is poured on the surface of the template again or other binders are combined.
when each part of the non-dismantling formwork is subjected to compression resistance checking, the coagulation pressure is 2.5 times of that of the purified water with equal height. The related calculation formula is inquired in 'concise calculation handbook'.
5) and (3) punching holes on the steel wire mesh according to the positions of the components penetrating through the template:
According to the position that the reinforcing steel bar passes the template, trompil on the wire net piece, the trompil instrument should adopt the steel bar sharpening of the same model to punch a hole on the wire net piece by hand, avoids cutting off the steel wire as far as possible, leads to leaving weak point in hole department, increases the probability of exploding the mould when pouring.
holes with the diameter larger than 35mm must be correspondingly reinforced.
6) laying steel bars:
The steel bars are installed according to the requirements of drawings, related construction methods are described in a steel bar engineering construction manual, and the steel wire meshes are protected from being damaged in the construction process.
7) Pouring concrete:
Under the condition of not increasing a formwork support system, concrete is poured in layers, the thickness of each layer is preferably controlled to be 300mm, the interval time of each layer is about 3.5 hours, or pebbles with the diameter of 80mm fall onto the surface of the concrete from a height of 2m, and when the pebbles enter 1/4 which is not larger than the diameter of the concrete part, the next layer of concrete is poured. However, the time interval cannot be overlong, so that the concrete is subjected to construction cold joint, and quality problems are caused.
when concrete needs to be poured quickly and cannot be separated for a certain time between every two layers, a split screw supporting system needs to be added on the template, and the distance between split screws is preferably smaller than 400 mm.
8) Selecting whether to dismantle the formwork support system according to actual needs:
When the supporting system is made of steel, whether the supporting system is dismounted for secondary utilization is selected according to the actual situation of a construction area, and cost is saved.
example 2
in the embodiment, in the welding construction, the stress node must adopt full welding, and the spot welding mode is forbidden.
in this embodiment, during welding, the base material is preferably made of uniform-strength steel; when the base metal strength is inconsistent, the welding material is selected according to the steel with the lowest strength, and the parameters of tensile strength, bending resistance, shearing resistance and the like of the steel are calculated according to the lowest value of the strength of the steel of the same member during mechanical checking.
In this embodiment, under the condition that the stress condition is satisfied, the steel wire mesh of the non-dismantling formwork should be a single layer.
In this embodiment, avoid the wire net piece to drench with rain repeatedly, keep dry as far as possible, the wire net piece that the corrosion is serious before laying can not use.
In this embodiment, when the stability of the template is checked, an inspector holds the template support system and shakes vigorously (with a force of about 150N) along the stress direction of the template, the displacement of the template along the stress direction is preferably within 2mm, and the template larger than 5mm must be reinforced again.
The application scope and advantages and disadvantages of the invention
1) the application range is as follows:
Under various conditions, the flatness standard of the surface of a large, medium and small template can be more than +/-5 mm for the concrete surface requiring the surface of the template.
2) The advantages and disadvantages are as follows:
a) the advantages are that: the process is simple, and the operators do not need special training; the construction materials are all engineering conventional materials; the construction speed is high; no regional condition limitation exists; is suitable for various special-shaped components; the consumption of the steel is reduced by about 7.5 percent compared with that of the like finished product non-dismantling template steel; the practicability is high, the form of the template is flexible and changeable, and the support mode can be adjusted according to the actual situation; the construction profit is higher than the traditional template.
b) The disadvantages are as follows: the flatness of the concrete mould sticking surface is low; the steel wire mesh is easy to rust; belongs to a special template and cannot completely replace the traditional template.
The invention discloses a multifunctional disassembly-free formwork construction method, which adopts a relatively dense steel wire mesh and utilizes the tension of concrete to plug the concrete to form a formwork, a large amount of small bulges are formed on the surface of the formwork by a small amount of cement mortar penetrating through the steel wire mesh, the later concrete surface is favorably combined with other binders, the process is simple, the construction speed is high, the form of the formwork is flexible and changeable, and the support mode can be adjusted according to the actual condition; the steel wire mesh is combined with components such as reinforcing steel bars, battens, section steel, steel pipes and split screws in different environments to form a support system meeting different requirements, and actual project tests prove that the construction requirements of high formwork supporting and large-volume concrete are completely met.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (8)
1. A multifunctional disassembly-free formwork construction method is characterized by comprising the following steps:
1) Measuring and paying off;
2) building a steel bar supporting system;
3) building a template supporting system and positioning a water stop steel plate: manufacturing a welded steel bar mesh between the inner side of the upright stanchion and the outer side of the side line of the template by adopting a steel bar bidirectional interval of 100-300 mm; under the condition that the water stop steel plate needs to be fixed, when the water stop steel plate vertically penetrates through the steel bar net, the cut steel bars are welded on the water stop steel plate, and meanwhile, the welding seam is fully welded;
4) Laying steel wire meshes on a formwork support system: selecting a proper steel wire mesh sheet according to the pressure of concrete on the template, fixing the steel wire mesh sheet on the inner side of the steel bar mesh sheet by using binding wires, and laying one or two layers of the steel wire mesh sheets;
5) Forming holes on the steel wire mesh according to the positions of the members penetrating through the template;
6) laying steel bars;
7) pouring concrete: the concrete is poured in a layered mode, or a counter-pull screw supporting system with the space less than 400mm is added on the template to carry out rapid concrete pouring;
8) And selecting whether to dismantle the formwork support system according to actual needs.
2. The multifunctional disassembly-free template construction method as claimed in claim 1, wherein in the step 1), a template side line is popped up by a measurer according to an engineering drawing, and the required error is less than 3 mm.
3. the construction method of the multifunctional disassembly-free formwork according to claim 1, wherein in the step 2), steel bars or channel steel are selected as a supporting system according to the amount of the steel bars on a drawing; when the steel bar needs to penetrate through the formwork, the upright post positions of the steel bar supporting system are adjusted, so that the upright posts near the formwork are all arranged on the outer side edge line of the formwork, and the interval between the upright posts on the outer side edge line is ensured to be smaller than 1500 mm; and uniformly welding the floor sweeping rods of the supporting system at the lowest ends of the vertical rods.
4. the construction method of the multifunctional disassembly-free formwork according to claim 1 or 3, wherein in the step 3), when the height of the formwork is more than 300mm and the length of the formwork is more than 500mm, the diameter of the adopted steel bar is 6.5-12 mm; the thickness of the water stop steel plate is not less than 3 mm.
5. The construction method of the multifunctional disassembly-free formwork according to claim 4, wherein in the step 4), the lapping length of the steel wire meshes is not less than the length of two hole distances of the steel mesh; when two layers of steel wire meshes are paved, the aperture of the outer layer of steel wire meshes is larger than that of the inner layer of steel wire meshes by more than 50 mm.
6. The construction method of the multifunctional disassembly-free formwork according to claim 5, wherein in the step 4), the steel wire mesh is a galvanized steel wire mesh with a steel wire diameter of 0.2-1.5 mm and a hole diameter of 1-10 mm.
7. The construction method of the multifunctional disassembly-free formwork according to claim 1, wherein in the step 5), the hole forming tool adopts a steel bar sharpening of the same type to manually punch holes on the steel wire mesh, and the holes with the diameter larger than 35mm are subjected to reinforcement treatment.
8. The construction method of the multifunctional disassembly-free formwork according to claim 1 or 7, wherein in the step 7), when concrete is poured in layers, the thickness of each layer is controlled to be 300mm, and the interval time of each layer is 3.5 hours; or pebbles with the diameter of 80mm fall onto the surface of the concrete from a height of 2m, and when the pebbles enter 1/4, the diameter of which is not more than that of the concrete part, the next layer of concrete is poured.
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| CN201910854091.8A CN110552506A (en) | 2019-09-10 | 2019-09-10 | multifunctional non-dismantling formwork construction method |
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| CN201910854091.8A CN110552506A (en) | 2019-09-10 | 2019-09-10 | multifunctional non-dismantling formwork construction method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07224535A (en) * | 1994-02-14 | 1995-08-22 | Mitsui Constr Co Ltd | Concrete crack prevention method |
| CN103938870A (en) * | 2014-03-27 | 2014-07-23 | 焦作建工集团有限公司 | Lightweight concrete and normal concrete synchronously-pouring method |
| CN204960098U (en) * | 2015-09-01 | 2016-01-13 | 山东电力建设第一工程公司 | Concrete form is exempted from to tear open by grout hole |
| CN206070600U (en) * | 2016-08-31 | 2017-04-05 | 中国一冶集团有限公司 | A kind of basement bottom plate rear pouring tape plate device |
-
2019
- 2019-09-10 CN CN201910854091.8A patent/CN110552506A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07224535A (en) * | 1994-02-14 | 1995-08-22 | Mitsui Constr Co Ltd | Concrete crack prevention method |
| CN103938870A (en) * | 2014-03-27 | 2014-07-23 | 焦作建工集团有限公司 | Lightweight concrete and normal concrete synchronously-pouring method |
| CN204960098U (en) * | 2015-09-01 | 2016-01-13 | 山东电力建设第一工程公司 | Concrete form is exempted from to tear open by grout hole |
| CN206070600U (en) * | 2016-08-31 | 2017-04-05 | 中国一冶集团有限公司 | A kind of basement bottom plate rear pouring tape plate device |
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Application publication date: 20191210 |