CN111119472B - Prefabricated formwork for concrete interfaces with different strength grades and construction method thereof - Google Patents
Prefabricated formwork for concrete interfaces with different strength grades and construction method thereof Download PDFInfo
- Publication number
- CN111119472B CN111119472B CN201911307061.1A CN201911307061A CN111119472B CN 111119472 B CN111119472 B CN 111119472B CN 201911307061 A CN201911307061 A CN 201911307061A CN 111119472 B CN111119472 B CN 111119472B
- Authority
- CN
- China
- Prior art keywords
- steel
- prefabricated
- component
- concrete
- net
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a prefabricated template for concrete interfaces with different strength grades and a construction method thereof, wherein the prefabricated template comprises prefabricated templates for connecting beam members and vertical members, the prefabricated template comprises a mesh component formed by vertically and sequentially overlapping a plurality of reinforcing mesh sheets, a prefabricated concrete connecting section positioned on the lower half part of the mesh component, short section steel vertically penetrating through the centroid position of the upper half part of the mesh component, horizontal longitudinal ribs vertically penetrating through the mesh component and corresponding to longitudinal reinforcing steel bars of the beam members, and side supporting reinforcing steel bars obliquely arranged on one side of the upper half part of the mesh component and used for connecting the beam members. The prefabricated formwork solves the problems that the concrete strength grades of the vertical member and the horizontal member are different and the construction is difficult when the beam height is higher, and the prefabricated formwork greatly facilitates the construction and improves the construction quality.
Description
Technical Field
The invention relates to a prefabricated template, in particular to a prefabricated template for concrete interfaces with different strength grades.
Background
In high-rise or some super high-rise buildings, the concrete strength of vertical members (such as walls or columns) tends to be higher, while the concrete strength of horizontal members (such as beam members) is lower and does not need to be raised to the same strength level. The beam height that connects two concrete shear wall limbs often is higher, in order to guarantee the wholeness of structure, often will pour wall or post and roof beam together.
When the height of the beam is high and the strength grades of the concrete of the beam member and the concrete of the vertical member are not consistent, in order to ensure that the concrete of the two members with different strength grades is not mixed with each other, the traditional construction process adopts a reinforcing mesh to separate. However, when the height of the beam is high, the steel wire mesh sheet can leak slurry due to the fact that the steel wire mesh sheet cannot bear the huge lateral pressure of concrete, and the whole steel wire mesh sheet can be torn when the concrete is serious.
Therefore, it is desired to solve the above problems.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a prefabricated template for concrete interfaces with different strength grades, which can effectively prevent a steel mesh from being torn and leaking under the condition of larger concrete side pressure.
The second purpose of the invention is to provide a construction method of the prefabricated formwork for concrete interfaces with different strength grades.
The technical scheme is as follows: in order to achieve the purpose, the invention discloses a prefabricated template for concrete interfaces with different strength grades, which comprises a prefabricated template for connecting beam members and vertical members, wherein the prefabricated template comprises a mesh component formed by vertically and sequentially stacking a plurality of reinforcing mesh sheets, a prefabricated concrete connecting section positioned at the lower half part of the mesh component, short section steel vertically penetrating through the centroid position of the upper half part of the mesh component, horizontal longitudinal ribs vertically penetrating through the mesh component and corresponding to longitudinal reinforcing steel bars of the beam members, and side supporting reinforcing steel bars obliquely arranged on one side of the upper half part of the mesh component and used for connecting the beam members.
The mesh component comprises a dense steel bar mesh positioned in the middle and sparse steel bar meshes positioned on two sides, wherein the steel bar diameter of the dense steel bar mesh is smaller than that of the sparse steel bar mesh, and the mesh size of the dense steel bar mesh is smaller than that of the sparse steel bar mesh.
Preferably, the short section steel is H-shaped steel, I-shaped steel, a square steel pipe, a round steel pipe, angle steel or channel steel.
And the side bracing steel bars are symmetrically obliquely arranged on the other side of the upper half part of the mesh assembly and are used for connecting the vertical members.
Furthermore, the included angle between the side bracing steel bar and the horizontal direction is 30-60 degrees.
Preferably, the included angle between the side bracing steel bar and the horizontal direction is 30-60 degrees.
And moreover, the length L of the short section steel is t which is more than L and less than 2t, and t is the wall thickness of the precast concrete connecting section.
The invention relates to a construction method of prefabricated formworks for concrete interfaces with different strength grades, which comprises the following steps:
(1) vertically and sequentially overlapping the dense reinforcement meshes and the sparse reinforcement meshes, welding and fixing to form a mesh assembly, wherein the sparse reinforcement meshes are positioned on two sides of the dense reinforcement meshes;
(2) pouring concrete on the lower half part of the net sheet assembly to form a precast concrete connecting section;
(3) vertically penetrating the short section steel from the centroid position of the upper half part of the net piece assembly, and welding and fixing the short section steel on the net piece assembly;
(4) according to the position of the longitudinal steel bar of the beam component, penetrating a horizontal longitudinal bar at the corresponding position of the net piece component, and welding and fixing the horizontal longitudinal bar on the net piece component;
(5) symmetrically and obliquely arranging side supporting reinforcing steel bars on two sides of the upper half part of the net sheet assembly, and welding and fixing one ends of the side supporting reinforcing steel bars and the net sheet assembly to form a prefabricated template;
(6) placing the prefabricated template in the vertical component template and the beam component template;
(7) binding the steel bars in the vertical members and the longitudinal steel bars and stirrups in the beam members;
(8) welding and fixing the other end of the side supporting steel bar of the prefabricated template with the vertical member and the longitudinal steel bar of the beam member;
(9) and pouring concrete with different strength grades on two sides of the prefabricated formwork.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
(1) the prefabricated formwork is a prefabricated component, and complicated construction processes such as large-area formwork supporting and steel bar welding are avoided; (2) when the height of the concrete poured on one side and still in a plastic state is higher, the lateral pressure of the plastic concrete on the mesh is higher, the mesh is in a pulled state under the lateral pressure, the tensile stress of the mesh at the lower part is higher, and when the mesh adopts a dense steel bar mesh with a thinner diameter, the mesh is broken under the huge tensile stress, so that a leakage phenomenon is caused; when the lower mesh adopts the combination of the dense steel bar mesh and the sparse steel bar mesh and the prefabricated concrete connecting section is additionally arranged to bear the lateral pressure during the concrete pouring, the dense steel bar mesh can be effectively prevented from being torn and leaking under the larger lateral pressure of the concrete; the mesh component at the precast concrete connecting section can effectively limit the crack development of the concrete in the lower connecting section under the action of lateral pressure; (3) in general, concretes with different strength grades are poured in batches, which causes the generation of cold joints, and the occurrence of the cold joints causes the reduction of the engaging capacity of the interface of the two concretes; even if the concrete is poured at the same time, the mesh is also required to be used for separation, the mesh cannot be taken out after the concrete is poured and is left in the concrete, and the engaging capacity of the interface of the two types of concrete is reduced; in the invention, the short steel is inserted into the two kinds of concrete, and when the interface of the two kinds of concrete has shear force, the short steel can effectively transfer the shear force, so that the interface of the two kinds of concrete cannot be dislocated; the condition that the shearing resistance is reduced due to weak engaging capability of concrete interfaces with different strength grades can be prevented; (4) the concrete with different strength grades can be poured in batches during construction, namely, the concrete on one side is poured firstly, and then the concrete with different strength grades on the other side is poured; when the height of concrete poured on one side is higher, the danger that the template on the interface overturns possibly occurs; in the invention, the side supporting steel bars are arranged on both sides, so that the overturning moment caused by pouring and vibrating concrete can be resisted through the side supporting steel bars no matter which side concrete is poured firstly; the condition that the template is inclined or even overturned due to different heights of the concrete at two sides in the pouring process can be prevented; (5) in the traditional construction process, in order to meet the anchoring requirement of the reinforcing steel bars, the horizontal longitudinal bars need to penetrate through the meshes of two concrete interfaces, in other words, the meshes need to avoid the horizontal longitudinal bars, and the construction process is complicated; the horizontal longitudinal bars are prefabricated in advance, and the horizontal longitudinal bars are connected with the longitudinal steel bars of the beam members only by certain connecting means (such as binding lap joint or mechanical connection) on a construction site, so that the construction step of penetrating through the net sheets on the construction site does not need to consume a large amount of time; the connection of the horizontal longitudinal ribs of the two side members is facilitated; (6) The prefabricated formwork solves the problems that the concrete strength grades of the vertical member and the horizontal member are different and the construction is difficult when the beam height is higher, and the prefabricated formwork greatly facilitates the construction and improves the construction quality.
Drawings
FIG. 1 is a schematic structural view of a reinforcing cage bar mesh according to the present invention;
FIG. 2 is a schematic structural view of a reinforcing mesh according to the present invention;
FIG. 3 is a schematic structural view of a prefabricated form of the present invention;
FIGS. 4(a) to 4(l) are schematic views showing the steps of the construction method of the present invention;
FIG. 5 is a schematic cross-sectional view of a beam member according to the present invention;
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in fig. 3, the prefabricated formwork for concrete interfaces with different strength grades of the invention comprises a prefabricated concrete connecting section 1, a dense steel bar mesh 2, a sparse steel bar mesh 3, horizontal longitudinal bars 4, side supporting steel bars 5 and short section steel 6.
As shown in fig. 1 and 2, the steel bar diameter of the dense steel bar mesh 2 is smaller than the steel bar diameter of the sparse steel bar mesh 3, the mesh size of the dense steel bar mesh 2 is smaller than the mesh size of the sparse steel bar mesh 3, the dense steel bar mesh 2 and the 2 sparse steel bar meshes 3 are vertically and sequentially stacked to form a mesh assembly, the dense steel bar mesh 2 is located in the middle, and the sparse steel bar mesh 3 is located on two sides of the dense steel bar mesh 2.
Precast concrete is poured on the lower half portion of the net piece assembly, the short section steel 6 vertically penetrates through the centroid position of the upper half portion of the net piece assembly, the short section steel 6 can be H-shaped steel, I-shaped steel, square steel pipes, round steel pipes, angle steel or channel steel, the length L of the short section steel 6 is t and L is smaller than 2t, t is the wall thickness of the precast concrete connecting section 1, and the length L of the short section steel 6 is preferably selected from 250mm to 1200 mm.
The horizontal longitudinal ribs 4 vertically penetrate through the net piece assembly and correspond to the longitudinal steel bars of the beam member, and when the thickness of the vertical member is smaller and the side supporting steel bars 5 are inconvenient to support, the side supporting steel bars 5 used for connecting the beam member can be obliquely arranged on one side of the upper half part of the net piece assembly; if the vertical member is large in thickness and sufficient in space, the side supporting reinforcing steel bars 5 used for connecting the vertical member can be symmetrically and obliquely arranged on the other side of the upper half part of the net piece assembly, and the included angle between the side supporting reinforcing steel bars 5 and the horizontal direction is 30-60 degrees.
The invention relates to a construction method of prefabricated formworks for concrete interfaces with different strength grades, which comprises the following steps:
(1) vertically and sequentially overlapping the dense reinforcement mesh 2 and the sparse reinforcement mesh 3 to form a mesh component by welding and fixing, wherein the sparse reinforcement mesh 3 is positioned at two sides of the dense reinforcement mesh 2, as shown in fig. 4(a) and 4 (b);
(2) pouring concrete on the lower half part of the mesh component to form a precast concrete connecting section 1, as shown in fig. 4(c) and 4 (d);
(3) vertically penetrating the short section steel 6 from the centroid position of the upper half part of the mesh assembly, and welding and fixing the short section steel 6 on the mesh assembly, as shown in fig. 4(e) and 4 (f);
(4) according to the position of the longitudinal steel bar of the beam component, penetrating a horizontal longitudinal bar 4 at the corresponding position of the net sheet component, and welding and fixing the horizontal longitudinal bar 4 on the net sheet component, as shown in fig. 4(g) and 4 (h);
(5) symmetrically and obliquely arranging side supporting reinforcing steel bars 5 at two sides of the upper half part of the net sheet assembly, and welding and fixing one end of each side supporting reinforcing steel bar 5 with the net sheet assembly to form a prefabricated template, as shown in fig. 4(i) and 4 (j);
(6) placing the prefabricated formworks in the vertical member formworks 7 and the beam member formworks 8, as shown in fig. 4 (k);
(7) binding the steel bars in the vertical members and the longitudinal steel bars 9 and stirrups 10 in the beam members, as shown in fig. 5;
(8) welding and fixing the other end of the side supporting steel bar of the prefabricated template with the vertical member and the longitudinal steel bar of the beam member, as shown in fig. 4 (l);
(9) and pouring concrete with different strength grades on two sides of the prefabricated formwork.
Claims (4)
1. A prefabricated form for different strength grade concrete interfaces, includes the prefabricated form that is used for tie-beam component and vertical member, its characterized in that: the steel bar net component comprises a net component formed by vertically and sequentially stacking a plurality of steel bar nets, a precast concrete connecting section (1) positioned on the lower half part of the net component, short section steel (6) vertically penetrating the upper half part of the net component, horizontal longitudinal ribs (4) vertically penetrating the net component and corresponding to longitudinal steel bars of a beam member, side supporting steel bars (5) obliquely arranged on one side of the upper half part of the net component and used for connecting the beam member, and side supporting steel bars (5) symmetrically and obliquely arranged on the other side of the upper half part of the net component and used for connecting the vertical member; the length L of the short section steel (6) is t which is more than L and less than 2t, and t is the wall thickness of the precast concrete connecting section (1); the net piece subassembly is including being located the dense reinforcing bar net piece (2) of middle and being located sparse reinforcing bar net piece (3) of both sides, and wherein the reinforcing bar diameter of dense reinforcing bar net piece is less than the reinforcing bar diameter of sparse reinforcing bar net piece, and the mesh size of dense reinforcing bar net piece is less than the mesh size of sparse reinforcing bar net piece.
2. The prefabricated form for concrete interfaces of different strength ratings as claimed in claim 1, wherein: the short section steel (6) is H-shaped steel, I-shaped steel, a square steel pipe, a round steel pipe, angle steel or channel steel.
3. The prefabricated form for concrete interfaces of different strength ratings as claimed in claim 1, wherein: the included angle between the side bracing steel bar (5) and the horizontal direction is 30-60 degrees.
4. A method of constructing prefabricated forms for concrete interfaces of different strength classes according to any one of claims 1 to 3, characterised in that it comprises the following steps:
(1) vertically and sequentially overlapping the dense reinforcement meshes (2) and the sparse reinforcement meshes (3) to form a mesh assembly in a welding and fixing manner, wherein the sparse reinforcement meshes (3) are positioned on two sides of the dense reinforcement meshes (2);
(2) pouring concrete on the lower half part of the net sheet assembly to form a precast concrete connecting section (1);
(3) vertically penetrating the short section steel (6) from the centroid position of the upper half part of the net sheet assembly, and welding and fixing the short section steel (6) on the net sheet assembly;
(4) according to the position of the longitudinal steel bar of the beam component, a horizontal longitudinal bar (4) penetrates through the corresponding position of the net piece component, and the horizontal longitudinal bar (4) is welded and fixed on the net piece component;
(5) symmetrically and obliquely arranging side supporting reinforcing steel bars (5) at two sides of the upper half part of the net sheet assembly, and welding and fixing one end of each side supporting reinforcing steel bar (5) and the net sheet assembly to form a prefabricated template;
(6) placing the prefabricated template in the vertical component template (7) and the beam component template (8);
(7) binding steel bars in the vertical component and longitudinal steel bars (9) and stirrups (10) in the beam component;
(8) welding and fixing the other end of the side supporting steel bar of the prefabricated template with the vertical member and the longitudinal steel bar of the beam member;
(9) and pouring concrete with different strength grades on two sides of the prefabricated formwork.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911307061.1A CN111119472B (en) | 2019-12-18 | 2019-12-18 | Prefabricated formwork for concrete interfaces with different strength grades and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911307061.1A CN111119472B (en) | 2019-12-18 | 2019-12-18 | Prefabricated formwork for concrete interfaces with different strength grades and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111119472A CN111119472A (en) | 2020-05-08 |
| CN111119472B true CN111119472B (en) | 2022-01-14 |
Family
ID=70499462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911307061.1A Active CN111119472B (en) | 2019-12-18 | 2019-12-18 | Prefabricated formwork for concrete interfaces with different strength grades and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111119472B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329202A (en) * | 2001-07-26 | 2002-01-02 | 广东省建筑设计研究院 | Storey steel pipe concrete column R.C joint |
| JP2015218497A (en) * | 2014-05-19 | 2015-12-07 | 宇部興産株式会社 | Seismic strengthening structure and seismic strengthening method |
| CN105951988A (en) * | 2016-07-20 | 2016-09-21 | 河北科工建筑工程集团有限公司 | Different-strength-grade concrete structure of beam-column joint and construction technology of concrete structure |
| CN107724680A (en) * | 2016-08-11 | 2018-02-23 | 五冶集团上海有限公司 | A kind of high-storey building frame structure beam-column node construction method |
| CN110468883A (en) * | 2019-08-26 | 2019-11-19 | 吴廷兵 | The method that foundation concrete post-cast strip conventional mould improves construction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966245A (en) * | 2012-12-07 | 2013-03-13 | 清华大学 | Connecting method of steel beam and existing reinforced concrete column |
-
2019
- 2019-12-18 CN CN201911307061.1A patent/CN111119472B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329202A (en) * | 2001-07-26 | 2002-01-02 | 广东省建筑设计研究院 | Storey steel pipe concrete column R.C joint |
| JP2015218497A (en) * | 2014-05-19 | 2015-12-07 | 宇部興産株式会社 | Seismic strengthening structure and seismic strengthening method |
| CN105951988A (en) * | 2016-07-20 | 2016-09-21 | 河北科工建筑工程集团有限公司 | Different-strength-grade concrete structure of beam-column joint and construction technology of concrete structure |
| CN107724680A (en) * | 2016-08-11 | 2018-02-23 | 五冶集团上海有限公司 | A kind of high-storey building frame structure beam-column node construction method |
| CN110468883A (en) * | 2019-08-26 | 2019-11-19 | 吴廷兵 | The method that foundation concrete post-cast strip conventional mould improves construction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111119472A (en) | 2020-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105569224B (en) | Concrete filled steel tube edge constraint overlaps monoblock type shear wall and preparation and installation method | |
| CN104727441B (en) | Prestress assembled concrete beam column joint structure and construction method thereof | |
| CN101260720B (en) | Connection construction method for network frame prefabricated composite board | |
| CN104328847B (en) | A kind of construction method of interior bearing diagonal assembly concrete shear wall prefabricated components | |
| CN208309797U (en) | Steel tube concrete beam and column cross connection node structure | |
| CN108678218B (en) | Assembly type concrete shear wall based on multipurpose thin-wall steel pipe and construction method thereof | |
| CN108425429A (en) | The forming method of steel tube concrete beam and column cross connection node structure and composite structure | |
| CN113123629B (en) | Prestressed reinforcement construction method for section Liang Zengda after column pulling of existing structure | |
| CN106759858B (en) | A kind of connecting node and preparation method of H profile steel beam and rectangular steel-tube concrete column | |
| CN109235662A (en) | A kind of column board connecting equipment comprising multiple shear connector | |
| CN108678225A (en) | The built-in steel plate combined shear wall of built-in presstressed reinforcing steel steel pipe concrete frame and the practice | |
| CN210067020U (en) | Sub-structure assembled frame structure | |
| CN208604792U (en) | A kind of prefabricated prestressing Self-resetting shear wall structure | |
| CN114045940A (en) | Profile steel connecting node of precast concrete tubular pile column and hollow floor or flat slab | |
| CN213741571U (en) | Prefabricated column and beam column node for prefabricated concrete building structure reserved steel bar perforation | |
| CN111119472B (en) | Prefabricated formwork for concrete interfaces with different strength grades and construction method thereof | |
| CN108643395A (en) | A kind of prefabricated prestressing Self-resetting shear wall structure and its construction method | |
| CN105951987B (en) | Node and construction method are poured after the secondary external permanent aluminium sheet external mold of frame | |
| CN111236419A (en) | Novel beam column joint of reinforced concrete structure and construction method | |
| CN111877369A (en) | Construction method for slope support reinforcement | |
| CN111472836A (en) | Flexible recyclable retaining wall and construction method thereof | |
| CN212053325U (en) | Cast-in-place concrete hollow filler wall | |
| CN114482553A (en) | Concrete interception processing method for wall column when concrete labels are different | |
| CN206205144U (en) | Node is poured after the secondary external permanent aluminium sheet external mold of framework | |
| CN105178624A (en) | Prestress wall removing technology implemented by aid of non-binding steel strands |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |