CN113090021A - Construction method of novel air bag template for narrow deformation joint between building units - Google Patents
Construction method of novel air bag template for narrow deformation joint between building units Download PDFInfo
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- CN113090021A CN113090021A CN202110532827.7A CN202110532827A CN113090021A CN 113090021 A CN113090021 A CN 113090021A CN 202110532827 A CN202110532827 A CN 202110532827A CN 113090021 A CN113090021 A CN 113090021A
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- air bag
- template
- deformation joint
- concrete
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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
- E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
- E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
- E04G15/063—Re-usable forms
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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
- E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
- E04G15/04—Cores for anchor holes or the like around anchors embedded in the concrete
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a construction method of a novel air bag template for a narrow deformation joint between building units, which comprises the following steps: step 1, manufacturing the air bag template, and step 2, calculating the bearing capacity of the air bag template; step 3, manufacturing the positioning bracket of the air bag template, wherein the positioning bracket comprises a base section and a standard section, the standard section is in lap joint with the base section through a pair of parallel bolts, and the lower end of the base section is fixedly connected with a triangular bracket; step 4, erecting the deformation joint protection plate; step 5, installing a positioning bracket; step 6, installing the air bag template in the deformation joint; step 7, inflating the air bag template, wherein the air pressure in the air bag template is not less than 45 KPa; 8, pouring concrete, namely erecting the deflated air bag template in a deformation joint, and inflating and fixing after accurate positioning; and (3) after the concrete is finally set, deflating and removing the air bag template.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a novel air bag template for a narrow deformation joint between building units.
Background
The deformation joint between the building unit structure is designed to be small in width, generally in the range of 70-100 mm, and due to the fact that the space of the deformation joint is narrow, the construction difficulty of a concrete member at the deformation joint is increased, the formwork at the deformation joint is difficult to erect and dismantle, and the forming effect of the concrete member is poor.
In the prior art, for the construction of a concrete member at a deformation joint part, two methods are generally adopted at present: the traditional construction method uses a wooden template or a brick moulding bed, and has the defects that the template cannot be taken out after the member is formed, so that the use function of the deformation joint is weakened; the latest construction method mainly adopts materials such as polymer plates or foam plates and the like as concrete supporting surfaces, and has the defects that the materials cannot be recycled, the deformation joint is not densely filled or deviates, the concrete is wasted, and the appearance quality of the concrete cannot be ensured.
Disclosure of Invention
The invention aims to solve the following defects in the prior art that the construction difficulty of a concrete member at a deformation joint part is increased due to the narrow space of the deformation joint part, so that the supporting and dismantling of a formwork at the deformation joint part are difficult, and the forming effect of the concrete member is poor.
In order to achieve the purpose, the invention adopts the following technical scheme:
a construction method of a novel air bag template for a narrow deformation joint between building units comprises the following steps:
step 4, erecting the deformation joint protection plate;
step 7, inflating the air bag template, wherein the air pressure in the air bag template is not less than 45 KPa;
step 8, pouring concrete, wherein the perpendicularity and the position of the template are monitored by adopting a level meter in the whole process of pouring the concrete;
step 9, dismantling the air bag template;
and 10, curing the concrete.
Preferably, the manufacturing method of the airbag template in the step 1 is to customize an airbag template with a proper width to a manufacturer according to the width of the deformation joint.
Preferably, the air bag template in step 1 includes a pair of plastic templates and an air bag, the two plastic templates are respectively and fixedly connected to two opposite side walls of the air bag, and the two plastic templates are parallel to each other.
Preferably, via said step 2:
the bearing pressure of the air bag template is 45 KN/square meter;
the lateral pressure of the concrete in the limit state is 34.213 KN/square meter;
34.213 KN/square meter <45 KN/square meter, so the air bag template can bear the side pressure of the concrete in the limit state.
Preferably, the step 4 of erecting the deformation joint template comprises the following steps:
s1, erecting a beam bottom template;
s2, bundling the steel bars;
and S3, supporting the side template.
Preferably, the step 5 of installing the positioning bracket comprises the following steps:
s1, determining the installation position of the positioning bracket;
and S2, fixing the triangular support on the concrete surface through expansion bolts.
Preferably, the airbag module mounting step in step 6 includes the steps of:
s1, placing the airbag template in a deformation joint;
s2, fixedly connecting the upper end of the air bag template with the side template through a split bolt;
and S3, inflating the air bag template, wherein the air pressure in the air bag template is inflated to 45 KPa.
Preferably, the pouring concrete in the step 8 is poured in a layered mode, and the concrete on the two sides of the air bag template is symmetrically poured.
Preferably, the airbag module dismantling method in step 9 includes the following steps:
s1, waiting for initial setting of the cast concrete;
s2, deflating the air bag template;
and S3, separating the air bag template from the cast concrete.
Preferably, the concrete curing in step 10 includes the following steps:
s1, setting protection, and forbidding the front bearing of the cast concrete when the strength of the cast concrete reaches 2.5 MPa;
and S2, spraying water to the cast concrete coating film for curing.
Compared with the prior art, the invention has the beneficial effects that:
1. the construction method of the novel air bag template with the narrow deformation joints among the building units is simple and easy to understand, convenient and quick to disassemble and assemble, good in concrete forming effect,
2. the template can be recycled for multiple times, the cost investment is reduced, the template is economical and practical, stable in performance, safe and reliable, the difficult problem of mounting and dismounting the template in narrow spaces like deformation joints is solved, compared with the traditional construction process, the construction speed is accelerated, and the work efficiency is greatly improved; meanwhile, the construction method can be continuously derived and popularized to construction of various well inner membranes and core molds, and is high in practicability and wide in application range.
Drawings
FIG. 1 is a schematic front sectional view of a construction method of a novel air bag formwork for a narrow deformation joint between building units according to the present invention;
FIG. 2 is a schematic view of a partial front structure of a construction method of a novel air bag template for a narrow deformation joint between building units according to the present invention;
FIG. 3 is a schematic sectional view of a positioning bracket in a front view according to the construction method of the novel air bag formwork for a narrow deformation joint between building units;
FIG. 4 is a schematic view of a partial front sectional structure of the construction method of the novel air bag template for a narrow deformation joint between building units according to the present invention;
FIG. 5 is a schematic front view of an air bag formwork of the construction method of the novel air bag formwork for a narrow deformation joint between building units.
In the figure: 1, an air bag template, 11 air bags, 12 plastic templates, 2 positioning brackets, 21 standard joints, 211 parallel bolts, 22 basic joints, 223 triangular brackets, 3 split bolts, 4 templates, 5 steel pipes and 6 support frame bodies.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 5, a construction method of a novel air bag template for a narrow deformation joint between building units comprises the following steps:
specifically, the manufacturing method of the air bag template 1 comprises the steps of customizing an air bag template 1 with a proper width to a manufacturer according to the width of a deformation joint, wherein the air bag width = the width of the deformation joint-2 side templates, and the air bag template width = the width of the air bag +2 side templates;
specifically, the air bag template 1 comprises a pair of plastic templates 12 and an air bag 11, the two plastic templates 12 are respectively and fixedly connected to two opposite side walls of the air bag 11, and the two plastic templates 12 are parallel to each other;
specifically, the following calculation is carried out through the step 2:
the bearing pressure of the air bag template 1 is 45 KN/square meter;
the lateral pressure of the concrete in the limit state is 34.213 KN/square meter;
the calculation method is as follows: calculating the bearing capacity of the air bag template:
if beamThe height H of the lower hanger is less than or equal to 1.4255m, and the standard value of the side pressure of the beam newly cast concrete to the template is min {0.28 gamma [ ]ct0βv1/2，γcH}＝min{0.28×24×4×0.9×21/2，24×H}＝min{34.213，24H}＝24HkN/m2≤34.213kN/m2；
If the height H of the lower hanging part of the beam>1.4255m, the side pressure standard value of the beam newly cast concrete to the template is min {0.28 gamma }ct0βv1/2，γcH}＝min{0.28×24×4×0.9×21/2，24×H}＝min{34.213，24H}＝34.213kN/m2；
Through calculation and analysis, the side pressure standard value of the newly cast concrete of the beam to the template is 34.213kN/m at most2；
Therefore, the design value of the limit state of the load bearing capacity of the beam, sroot, is γ 0[1.35 × 0.9 × G4k +1.4 × Φ cQ4k ] ═ 1 × 1.35 × 0.9 × 34.213+1.4 × 0.9 × 2] ═ 44.089 kN/square meter.
Similarly, the side pressure standard value of the newly cast concrete of the wall to the template is 34.213kN/m at most2；
Design value S of bearing capacity limit state of wallBearing＝0.9max[1.2G4k+1.4Q4k，1.35G4k+1.4×0.7Q4k]＝0.9max[1.2×34.213+1.4×2，1.35×34.213+1.4×0.7×2]＝0.9max[43.856，48.148]＝0.9×48.148＝43.333kN/m2；
Design value S of normal use limit state of wall and beamIs just＝G4k＝34.213 kN/m2；
Similarly, the maximum side pressure standard value of the newly cast concrete of the column to the template is min {0.22 gamma }ct0β1β2v1/2，γcH}＝min{0.22×24×4×1×1×21/2，24×H}＝min{29.868，24H}＝29.868kN/m2；
Design value S of bearing capacity limit state of columnBearing＝0.9max[1.2G4k+1.4Q3k，1.35G4k+1.4×0.7Q3k]＝0.9max[1.2×29.868+1.4×2，1.35×29.868+1.4×0.7×2]＝0.9max[38.642，42.282]＝0.9×42.282＝38.054kN/m2；
Design value S for normal use limit state of columnIs just＝G4k＝29.868 kN/m2；
If the air pressure of the template is 45KPa, the calculation can be 45 KN/square meter;
step 4, erecting a deformation joint protection plate;
in particular, the method comprises the following steps of,
s1, erecting a beam bottom template, erecting a support frame body 6 according to the design parameters of the support frame body, laying bottom templates of beams on the support frame body 6, checking the positions of the beam bottom templates on two sides of the deformation joint accurately, and ensuring that the width of the deformation joint meets the design requirements
S2, bundling steel bars, drawing beam stirrup spacing on the side walls of the bottom die or drawing horizontal steel bars (stirrups) on the vertical steel bars of the wall and the column according to a design drawing, wherein joints of adjacent main reinforcements are staggered, and binding, welding and mechanical connection are sequentially performed from bottom to top;
s3, supporting a side template 4, wherein when the side template 4 is installed, the lower opening of the side template 4 is firstly aligned with the outer side line of the well-laid concrete component, then a fixed main keel is installed, and a steel pipe 5 (the side template 4 is supported by a support, and the steel pipe 5 is fixedly connected with a steel bar on the concrete;
specifically, S1, determining the installation position of the positioning support 2, accurately lofting the deformation joint position on the ground or floor, popping up a contour line, and then placing the positioning support 2 on the contour line;
s2, fixing the triangular support 223 on the concrete surface through expansion bolts;
specifically, S1, the air bag template 1 is placed in the deformation joint, the position is determined through the positioning support 2, the side wall is ensured to be straight, and the deformation joint and the concrete members on the two sides are ensured to be accurate in geometric dimension;
s2, fixedly connecting the upper end of the air bag template 1 with the side template 4 through the split bolts 3;
s3, inflating the air bag template 1, and inflating the air pressure in the air bag template 1 to 45KPa
Step 7, inflating the air bag template 1, wherein the air pressure in the air bag template 1 is not less than 45 KPa;
and 8, pouring concrete, wherein the perpendicularity and the position of the air bag template 1 are monitored by adopting a level in the whole process of pouring the concrete, concrete pouring pipelines and construction personnel cannot directly tread the air bag template 1, layered pouring is required, the air pressure of the air bag template 1 is observed at any time, and pouring is carried out along the longitudinal direction of the air bag template 1. And concrete on two sides of the deformation joint is poured in a balanced manner, and the height difference between the two sides is not more than 20 cm. In the concrete vibrating process, the vibrating rod cannot collide the side template 4 and the air bag template 1, particularly the air bag template 1, so that the air bag template 1 is prevented from deviating. In the pouring process, a level meter is adopted to monitor the perpendicularity and the position of the air bag template 1 in the whole process;
step 9, dismantling the air bag template 1;
in particular, the method comprises the following steps of,
s1, initial setting of the concrete to be poured;
s2, deflating the air bag template 1, opening an air pipe valve after the concrete is initially set, and discharging the air in the air bag 11;
and S3, separating the air bag template 1 from the poured concrete, and slowly separating the air bag template 1 from the concrete during separation and taking the air bag template out of the deformation joint. When the concrete is dismantled, the concrete is strictly pulled hard, if the concrete is difficult to take out, the reason is found out firstly, and then the concrete is taken out by taking corresponding measures, so that the forming quality of the concrete is ensured;
step 10, curing the concrete;
in particular, the method comprises the following steps of,
and S1, setting protection, and forbidding bearing before the strength of the cast concrete reaches 2.5 MPa. Thus, the concrete can be prevented from being damaged when not solidified;
and S2, spraying water to the cast concrete coating film for curing, so that the concrete can be prevented from cracking.
In the invention, mainly by combining the air bag 11 with the plastic template 12 and utilizing the principle of expansion and contraction of the air bag 11, the construction technology of safely and quickly mounting and dismounting the template bracket in a narrow space through the fixation of the positioning bracket 2 provides a new idea for the application of the air bag template 1, the construction method of the novel air bag template 1 with the narrow deformation joint between the building units is simple and easy to understand, convenient and quick to disassemble and assemble, good in concrete forming effect, the air bag template 1 can be recycled for a plurality of times, the cost investment is reduced, the construction method is economical, practical, stable in performance, safe and reliable, the problem of difficult mounting and dismounting of templates in narrow spaces like deformation joints is solved, compared with the traditional construction process, the construction speed is accelerated, the work efficiency is greatly improved, and simultaneously, the construction method can be continuously derived and popularized to construction of various well inner membranes and core molds, and has strong practicability and wide application range.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A construction method of a novel air bag template for a narrow deformation joint between building units is characterized by comprising the following steps:
step 1, manufacturing the air bag template (1);
step 2, calculating the bearing capacity of the air bag template (1);
step 3, manufacturing a positioning support (2) of the air bag template (1), wherein the positioning support (2) comprises a base section (22) and a standard section (21), the standard section (21) is in lap joint with the base section (22) through a pair of parallel bolts (211), and the lower end of the base section (22) is fixedly connected with a triangular support (223);
step 4, erecting the deformation joint protection plate;
step 5, installing a positioning bracket (2);
step 6, installing the air bag template (1) in the deformation joint;
step 7, inflating the air bag template (1), wherein the air pressure in the air bag template (1) is not less than 45 KPa;
step 8, pouring concrete, wherein the perpendicularity and the position of the template are monitored by adopting a level meter in the whole process of pouring the concrete;
step 9, dismantling the air bag template (1);
and 10, curing the concrete.
2. The construction method of the novel air bag template 1 for the narrow deformation joint between the building units according to the claim 1 is characterized in that the manufacturing method of the air bag template (1) in the step 1 is to customize the air bag template (1) with proper width to manufacturers according to the width of the deformation joint.
3. The construction method of a novel air bag formwork for a narrow deformation joint between building units as claimed in claim 1, characterized in that, the air bag formwork (1) in step 1 comprises a pair of plastic formworks (12) and an air bag (11), the two plastic formworks (12) are respectively fixedly connected to two opposite side walls of the air bag (11), and the two plastic formworks (12) are parallel to each other.
4. The construction method of the novel air bag template for the narrow deformation joint between the building units according to the claim 1, characterized in that the calculation in the step 2 is as follows:
the bearing pressure of the air bag template (1) is 45 KN/square meter;
the lateral pressure of the concrete in the limit state is 34.213 KN/square meter;
34.213 KN/square meter <45 KN/square meter, so the air bag template (1) can bear the side pressure of the concrete in a limit state.
5. The construction method of the novel air bag formwork for the narrow deformation joint between the building units as claimed in claim 1, wherein the step 4 of erecting the deformation joint formwork comprises the following steps:
s1, erecting a beam bottom template;
s2, bundling the steel bars;
and S3, supporting the side template (4).
6. The construction method of the novel air bag formwork for the narrow deformation joint between the building units as claimed in claim 1, characterized in that the step 5 of installing the positioning bracket (2) comprises the following steps:
s1, determining the installation position of the positioning bracket (2);
and S2, fixing the triangular support (223) on the concrete surface through expansion bolts.
7. The construction method of the novel air bag formwork for the narrow deformation joint between the building units as claimed in claim 1, characterized in that the step 6 of installing the air bag formwork (1) comprises the following steps:
s1, placing the airbag template (1) in a deformation joint;
s2, fixedly connecting the upper end of the air bag template (1) with the side template (4) through a split bolt (3);
s3, inflating the air bag template (1), and inflating the air pressure in the air bag template (1) to 45 KPa.
8. The construction method of the novel air bag template with the narrow deformation joint between the building units according to claim 1, characterized in that the pouring concrete in the step 8 is poured in a layered mode, and the concrete on two sides of the air bag template (1) is symmetrically poured.
9. The method for constructing a novel air bag template for a narrow deformation joint between building units as claimed in claim 1, wherein the step 9 of dismantling the air bag template (1) comprises the following steps:
s1, waiting for initial setting of the cast concrete;
s2, deflating the air bag template (1);
s3, separating the air bag template (1) from the casting concrete.
10. The construction method of the novel air bag formwork for the narrow deformation joint between the building units as claimed in claim 1, wherein the concrete curing in step 10 comprises the following steps:
s1, setting protection, and forbidding the front bearing of the cast concrete when the strength of the cast concrete reaches 2.5 MPa;
and S2, spraying water to the cast concrete coating film for curing.
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| CN104196055A (en) * | 2014-08-08 | 2014-12-10 | 山东万鑫建设有限公司 | Construction method for frameworks on lower portion of basement exterior wall |
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| US20180112389A1 (en) * | 2015-04-14 | 2018-04-26 | Adam G. Lake | Composite concrete and foam building component |
| CN207484964U (en) * | 2017-11-03 | 2018-06-12 | 重庆建工第四建设有限责任公司 | Side form structure at post-cast strip in concrete pouring construction |
| CN108396961A (en) * | 2018-01-24 | 2018-08-14 | 中冶天工集团有限公司 | Construction joint formwork erection method between a kind of dual wall |
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2021
- 2021-05-17 CN CN202110532827.7A patent/CN113090021A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196055A (en) * | 2014-08-08 | 2014-12-10 | 山东万鑫建设有限公司 | Construction method for frameworks on lower portion of basement exterior wall |
| US20180112389A1 (en) * | 2015-04-14 | 2018-04-26 | Adam G. Lake | Composite concrete and foam building component |
| CN105201106A (en) * | 2015-08-27 | 2015-12-30 | 山东华邦建设集团有限公司 | Construction method of double-shear wall template formwork at deformation joint |
| CN207484964U (en) * | 2017-11-03 | 2018-06-12 | 重庆建工第四建设有限责任公司 | Side form structure at post-cast strip in concrete pouring construction |
| CN108396961A (en) * | 2018-01-24 | 2018-08-14 | 中冶天工集团有限公司 | Construction joint formwork erection method between a kind of dual wall |
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