CN117365014A - Connecting method of upper longitudinal bars and closed stirrups of prefabricated superposed beam - Google Patents
Connecting method of upper longitudinal bars and closed stirrups of prefabricated superposed beam Download PDFInfo
- Publication number
- CN117365014A CN117365014A CN202311162211.0A CN202311162211A CN117365014A CN 117365014 A CN117365014 A CN 117365014A CN 202311162211 A CN202311162211 A CN 202311162211A CN 117365014 A CN117365014 A CN 117365014A
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- Prior art keywords
- notch
- stirrups
- upper longitudinal
- stirrup
- longitudinal ribs
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 230000002787 reinforcement Effects 0.000 claims abstract description 6
- 238000005452 bending Methods 0.000 claims description 15
- 239000011241 protective layer Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
-
- 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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to the field of building construction for strip-shaped building components, in particular to a connecting method of a longitudinal rib at the upper part of a prefabricated superposed beam and a closed stirrup. The connecting method of the longitudinal reinforcement and the closed stirrup on the upper part of the prefabricated laminated beam comprises the steps that at least three notch stirrups (3) and a rear upper longitudinal reinforcement (4) are arranged on the upper part of the prefabricated laminated beam (1), and is characterized in that: the method comprises the following steps of: step one, manufacturing notch stirrups; step two, arranging notch stirrups; step three, arranging upper longitudinal ribs; step four, connection; and fifthly, maintaining. The invention has low construction difficulty and high construction efficiency.
Description
Technical Field
The invention relates to the field of building construction for strip-shaped building components, in particular to a connecting method of a longitudinal rib at the upper part of a prefabricated superposed beam and a closed stirrup.
Background
The prior connecting mode of the upper longitudinal bars and the closed stirrups of the prefabricated superposed beam adopts the closed stirrups, and the rear longitudinal bars must pass through the lower parts of the stirrups, thereby causing the difficult problems of high construction difficulty, low construction efficiency and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a strip-shaped building member which reduces construction difficulty and improves construction efficiency, and discloses a connecting method of a longitudinal rib at the upper part of a prefabricated superposed beam and a closed stirrup.
The invention achieves the aim through the following technical scheme:
a connection method of a longitudinal reinforcement on the upper part of a prefabricated laminated beam and a closed stirrup comprises the steps that at least three notch stirrups and a rear upper longitudinal reinforcement are arranged on the upper part of the prefabricated laminated beam, and the connection method is characterized in that: the method comprises the following steps of:
step one, manufacturing notch stirrups: the notch stirrups are produced in a prefabricated component production factory according to design files and related specification requirements, two ends of the upper part of each notch stirrup are respectively in a 180-degree bending mode, at least three notches are formed in the middle part, the notch downwarping depth is larger than or equal to the sum of the diameters of the upper longitudinal ribs and the notch stirrups, so that the height of the upper longitudinal ribs is guaranteed to be consistent with the height of the upper longitudinal ribs of other parts of the prefabricated superposed beam, each notch corresponds to one notch, each notch is in a 180-degree bending mode, the bending diameter of each bending is not smaller than 2.5 times of the diameter of each notch stirrup, the two ends of each notch stirrup between each notch are bent by 90 degrees, the distance between each notch and the distance between the notch stirrup and the concrete surface of the prefabricated superposed beam are mutually matched, and the distance between the outer edge of each notch stirrup and the concrete surface of the prefabricated superposed beam meets the requirement of the minimum protective layer thickness;
step two, arranging notch stirrups: placing notch stirrups and upper longitudinal bars in the prefabricated superposed beam, and arranging the notch stirrups according to the requirements of a notch stirrup encryption area of the frame beam, wherein the notch stirrups are kept upright in the arranging process;
step three, arranging upper longitudinal ribs: after the prefabricated laminated beam is transported to a construction site for installation and fixation, placing the upper longitudinal ribs in notches of notch stirrups, wherein the height of the upper surface skin of each upper longitudinal rib is smaller than that of the lower surface skin of a 180-degree bent part at two ends of the notch stirrups, the lower surface skin of each upper longitudinal rib is tightly attached to the upper surface skin of the notch part of the notch stirrups, and the net distance between the horizontal directions of the upper longitudinal ribs is not smaller than 30mm and 1.5 times of the diameter of the upper longitudinal ribs;
step four, connection: after the upper longitudinal bar is placed, connecting the upper longitudinal bar with the notch stirrup by using a binding wire;
and step five, maintenance: pouring the upper post-pouring concrete, and curing the concrete after the pouring is finished.
The connecting method of the longitudinal ribs and the closed stirrups at the upper part of the prefabricated laminated beam is characterized by comprising the following steps of:
in the second step, the notch depth of the notch stirrup is adjusted according to the notch stirrups with different diameters and the upper longitudinal ribs;
in the third step, the upper longitudinal ribs can be arranged in parallel according to the design file;
and fourthly, connecting the upper longitudinal ribs with the notch stirrups by tie wires according to the modes of single filament plum blossom, single filament full binding or double filament plum blossom.
The connecting mode of the upper longitudinal rib and the closed stirrup of the prefabricated laminated beam can be used after being adjusted according to stirrups with different diameters and the longitudinal ribs, so that the distance between the outer edge of the upper longitudinal rib and the surface of concrete can meet the requirement of minimum protective layer thickness on one hand, and the integral mechanical property of the laminated beam is not influenced; on the other hand, the upper longitudinal bars are arranged outside the grooves of the stirrups in the downward bending mode of the precast beam through the downward bending mode of the stirrups, so that the closed stirrups for enabling the upper longitudinal bars to penetrate through the precast beam are avoided, construction difficulty is greatly reduced, and construction efficiency is improved.
The invention has the following beneficial effects:
1. the practicability is very strong, the principle is simple and easy to understand, and the popularization is very easy. The notch stirrup used in the invention is only required to be bent and manufactured in a factory according to design files and specification requirements, and no additional device is required.
2. The operation is convenient, and the efficiency of construction is high. When in field construction, only the upper longitudinal bars are required to be placed in the notches corresponding to the stirrups, and then the connection between the upper longitudinal bars and the stirrups is realized by adopting binding wires, so that the construction difficulty caused by the fact that the upper longitudinal bars pass through the closed stirrups is avoided, and the field construction efficiency is improved.
3. The applicability is stronger. The depth of the notch at the upper part of the stirrup can be adjusted according to stirrups with different diameters and longitudinal ribs, and the prefabricated laminated beam is applicable to prefabricated laminated beams with different sizes and different application scenes.
4. The height of the longitudinal ribs is consistent with that of the traditional beam. The down-warping depth of the stirrup is larger than or equal to the sum of the diameters of the rear longitudinal ribs and the stirrup, so that the height of the upper longitudinal ribs is ensured to be consistent with that of the upper longitudinal ribs of the traditional prefabricated superposed beam.
Drawings
Figure 1 is a cross-sectional view of the connection of the upper longitudinal bars to the closure stirrup in accordance with the invention,
figure 2 is a top view of the connection of the upper longitudinal bars to the closure stirrup in accordance with the invention,
fig. 3 is a side view of the connection of the upper longitudinal bars to the closure stirrup in accordance with the invention.
Reference numerals in the drawings: 1-prefabricating a superposed beam; 2-post-pouring concrete; 3-notch stirrups; 4-upper longitudinal ribs; 5-lumbar muscle; 6-lower longitudinal ribs.
Description of the embodiments
The invention is further illustrated by the following specific examples.
Examples
The connecting method of the upper longitudinal rib and the closed stirrup of the prefabricated laminated beam comprises the steps of arranging at least three notch stirrups 3 and a rear upper longitudinal rib 4 on the upper part of the prefabricated laminated beam 1, and sequentially implementing the following steps as shown in fig. 1-3:
step one, manufacturing notch stirrups: the notch stirrups 3 are produced in a prefabricated component production factory according to design files and related specification requirements, two ends of the upper part of each notch stirrup 3 are respectively in a 180-degree bending mode, at least three notches are formed in the middle part, the notch downwarping depth is larger than or equal to the sum of the diameters of the upper longitudinal stirrups 4 and the notch stirrups 3, so that the height of the upper longitudinal stirrups 4 is guaranteed to be consistent with the height of the upper longitudinal stirrups 4 of other parts of the prefabricated superposed beam 1, each notch corresponds to one notch, each notch is in a 180-degree bending mode, the bending diameter of bending is not smaller than 2.5 times of the diameter of each notch stirrup 3, the two ends of each notch stirrup 3 between each notch are bent by 90 degrees, the distance between the notches and the distance between the outer edges of the notch stirrups 3 and the concrete surface of the prefabricated superposed beam 1 are matched with each other, and the minimum protective layer thickness requirement is met;
step two, arranging notch stirrups: placing notch stirrups 3 and upper longitudinal bars 4 in the prefabricated laminated beam 1, arranging the notch stirrups 3 according to the requirements of the notch stirrups 3 encryption area of the frame beam, and keeping the notch stirrups 3 upright in the arranging process;
the depth of the notch stirrup 3 is adjusted according to the notch stirrup 3 and the upper longitudinal bar 4 with different diameters;
step three, arranging upper longitudinal ribs: after the prefabricated laminated beam 1 is transported to a construction site for installation and fixation, the upper longitudinal ribs 4 are placed in the notches of the notch stirrups 3, the height of the upper surface skin of each upper longitudinal rib 4 is smaller than that of the lower surface skin of 180-degree bent parts at the two ends of the notch stirrups 3, the lower surface skin of each upper longitudinal rib 4 is tightly attached to the upper surface skin of the notch parts of the notch stirrups 3, and the net distance between the horizontal directions of the upper longitudinal ribs 4 is not smaller than 30mm and 1.5 times of the diameter of the upper longitudinal ribs 4;
the upper longitudinal ribs 4 can be arranged in parallel according to design files;
step four, connection: after the upper longitudinal bar 4 is placed, the upper longitudinal bar 4 is connected with the notch stirrup 3 by binding wires in a single-filament plum blossom, single-filament full binding or double-filament plum blossom mode;
and step five, maintenance: pouring the upper post-pouring concrete 2, and curing the concrete after the pouring is completed.
Claims (2)
1. The connecting method of the longitudinal reinforcement and the closed stirrup on the upper part of the prefabricated laminated beam comprises the steps that at least three notch stirrups (3) and a rear upper longitudinal reinforcement (4) are arranged on the upper part of the prefabricated laminated beam (1), and is characterized in that: the method comprises the following steps of:
step one, manufacturing notch stirrups: the notch stirrup (3) is produced in a prefabricated member production factory, two ends of the upper part of the notch stirrup (3) are respectively in a 180-degree bending mode, at least three notches are formed in the middle part, the notch downwarping depth is larger than or equal to the sum of the diameters of the upper longitudinal ribs (4) and the notch stirrup (3), each upper longitudinal rib (4) corresponds to one notch, each notch is in a 180-degree bending mode, the bending diameter of bending is not smaller than 2.5 times of the diameter of the notch stirrup (3), two ends of the notch stirrup (3) between each notch are bent by 90 degrees, the distance between the notches and the distance between the outer edge of the notch stirrup (3) and the concrete surface of the prefabricated superposed beam (1) are mutually matched, and the minimum protective layer thickness requirement is met;
step two, arranging notch stirrups: placing notch stirrups (3) and upper longitudinal ribs (4) in the prefabricated laminated beam (1), and arranging the notch stirrups (3) according to the requirements of the notch stirrups (3) encryption area of the frame beam, wherein the notch stirrups (3) are kept upright in the arranging process;
step three, arranging upper longitudinal ribs: after the prefabricated laminated beam (1) is transported to a construction site for installation and fixation, the upper longitudinal ribs (4) are placed in the notches of the notch stirrups (3), the height of the upper end surface skin of each upper longitudinal rib (4) is smaller than the height of the lower surface skin of the 180-degree bending part at the two ends of the notch stirrups (3), the lower surface skin of each upper longitudinal rib (4) is tightly attached to the upper surface skin of the notch part of the notch stirrups (3), and the clearance between the horizontal directions of the upper longitudinal ribs (4) is not smaller than 30mm and 1.5 times of the diameter of the upper longitudinal ribs (4);
step four, connection: after the upper longitudinal bar (4) is placed, connecting the upper longitudinal bar (4) with the notch stirrup (3) by using binding wires;
and step five, maintenance: pouring the upper post-pouring concrete (2), and curing the concrete after the pouring is finished.
2. The method for connecting the upper longitudinal ribs and the closed stirrups of the prefabricated laminated beam as set forth in claim 1, which is characterized in that:
in the second step, the notch depth of the notch stirrup (3) is adjusted according to the notch stirrups (3) with different diameters and the upper longitudinal ribs (4);
thirdly, the upper longitudinal ribs (4) are arranged in parallel;
and fourthly, connecting the upper longitudinal ribs (4) with the notch stirrups (3) by binding wires according to the mode of single filament plum blossom, single filament full binding or double filament plum blossom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311162211.0A CN117365014A (en) | 2023-09-11 | 2023-09-11 | Connecting method of upper longitudinal bars and closed stirrups of prefabricated superposed beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311162211.0A CN117365014A (en) | 2023-09-11 | 2023-09-11 | Connecting method of upper longitudinal bars and closed stirrups of prefabricated superposed beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117365014A true CN117365014A (en) | 2024-01-09 |
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ID=89393677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311162211.0A Pending CN117365014A (en) | 2023-09-11 | 2023-09-11 | Connecting method of upper longitudinal bars and closed stirrups of prefabricated superposed beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117365014A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1499984A (en) * | 1923-01-29 | 1924-07-01 | Stephen L Heidrich | Support |
| JPH04334405A (en) * | 1991-05-10 | 1992-11-20 | Kajima Corp | Manufacture of precast concrete beam |
| ES1052142U (en) * | 2002-06-13 | 2002-11-01 | Forjados Marfe S A | Improved armor forged. (Machine-translation by Google Translate, not legally binding) |
| US20070039276A1 (en) * | 2005-08-19 | 2007-02-22 | R2M2 Rebar And Stressing, Inc. | Concrete reinforcer and method |
| EP1760218A2 (en) * | 2005-08-29 | 2007-03-07 | Megaray, S.L. | Stirrups for the construction of rebar reinforcements for reinforced concrete beams |
| CN106988483A (en) * | 2017-06-05 | 2017-07-28 | 姚芳辉 | A kind of assembled steel reinforced Concrete U Vierendeel girder and its construction method |
| KR20190108740A (en) * | 2018-03-15 | 2019-09-25 | 은성산업 주식회사 | Structure of rebar cage for cast in place pile |
| CN213709859U (en) * | 2020-08-28 | 2021-07-16 | 广东省建科建筑设计院有限公司 | Prefabricated part grooved superposed frame beam for fabricated concrete seismic structure |
| CN218541207U (en) * | 2022-11-02 | 2023-02-28 | 山东新厦建设有限公司 | Reinforced concrete beam double-rubber-band steel bar support structure |
-
2023
- 2023-09-11 CN CN202311162211.0A patent/CN117365014A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1499984A (en) * | 1923-01-29 | 1924-07-01 | Stephen L Heidrich | Support |
| JPH04334405A (en) * | 1991-05-10 | 1992-11-20 | Kajima Corp | Manufacture of precast concrete beam |
| ES1052142U (en) * | 2002-06-13 | 2002-11-01 | Forjados Marfe S A | Improved armor forged. (Machine-translation by Google Translate, not legally binding) |
| US20070039276A1 (en) * | 2005-08-19 | 2007-02-22 | R2M2 Rebar And Stressing, Inc. | Concrete reinforcer and method |
| EP1760218A2 (en) * | 2005-08-29 | 2007-03-07 | Megaray, S.L. | Stirrups for the construction of rebar reinforcements for reinforced concrete beams |
| ES2307357A1 (en) * | 2005-08-29 | 2008-11-16 | Megaray, S.L. | Stirrups for the construction of rebar reinforcements for reinforced concrete beams |
| CN106988483A (en) * | 2017-06-05 | 2017-07-28 | 姚芳辉 | A kind of assembled steel reinforced Concrete U Vierendeel girder and its construction method |
| KR20190108740A (en) * | 2018-03-15 | 2019-09-25 | 은성산업 주식회사 | Structure of rebar cage for cast in place pile |
| CN213709859U (en) * | 2020-08-28 | 2021-07-16 | 广东省建科建筑设计院有限公司 | Prefabricated part grooved superposed frame beam for fabricated concrete seismic structure |
| CN218541207U (en) * | 2022-11-02 | 2023-02-28 | 山东新厦建设有限公司 | Reinforced concrete beam double-rubber-band steel bar support structure |
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