CN112376918A - Method for quickly positioning precast reinforced concrete beam - Google Patents
Method for quickly positioning precast reinforced concrete beam Download PDFInfo
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- CN112376918A CN112376918A CN202011089674.5A CN202011089674A CN112376918A CN 112376918 A CN112376918 A CN 112376918A CN 202011089674 A CN202011089674 A CN 202011089674A CN 112376918 A CN112376918 A CN 112376918A
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- reinforced concrete
- concrete beam
- prefabricated reinforced
- top surface
- prefabricated
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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
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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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
- E04G21/14—Conveying or assembling building elements
- E04G21/142—Means in or on the elements for connecting same to handling apparatus
-
- 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
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a method for positioning a prefabricated reinforced concrete beam in the technical field of constructional engineering, which comprises the following steps that 1) in the prefabrication stage of a reinforced concrete column, a sleeve is embedded in the top surface of a bracket of the prefabricated reinforced concrete column, and an adjustable bolt is arranged in the sleeve; 2) when the prefabricated reinforced concrete beam is hoisted in place, firstly fixedly placing 2-5 round steel on the top surface of the bracket of the prefabricated reinforced concrete column, hoisting the prefabricated reinforced concrete beam to the top surface of the bracket of the prefabricated reinforced concrete column, and then rolling the round steel to adjust the horizontal position of the beam; 3) after the horizontal position of the precast reinforced concrete beam is adjusted, the elevation of the top of the precast reinforced concrete beam is vertically finely adjusted by adjusting the height of the adjustable bolt in the embedded sleeve. The invention can adjust the connection of the prefabricated reinforced concrete members with horizontal and vertical errors in the range of about 30-50 mm in the actual installation process, has high tolerance, simple operation and strong adaptability to construction sites.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and particularly relates to a method for positioning a prefabricated reinforced concrete beam.
Background
The prefabricated concrete structure is formed by connecting prefabricated concrete members or components through reinforcing steel bars, connecting pieces or applying prestress, and generally needs to cast concrete in situ to form an integral structure.
Under the current era background of applying the theme of environmental protection and no pollution, the prefabricated concrete structure is rapidly developed in China. The design, manufacture and construction links of the structural form are highly related, the key process is the connection between components, and the most common process is the connection between a prefabricated reinforced concrete beam and a reinforced concrete column. The connection quality control is mainly concerned with the control of the installation precision of the member during field construction except for the control of the position precision of the reserved steel bars of the member during the prefabrication process.
Although there are clear regulations for acceptance of component mounting deviation in "specification of acceptance of construction quality of concrete structure engineering" (GB50204-2015) and "specification of prefabricated concrete structure technology" (JGJ1-2014), it is required that the allowable deviation of component position and size should not exceed 10 mm. In actual engineering, however, the situation that the installation deviation exceeds the specification requirement at the construction site is often encountered. Meanwhile, from the construction perspective, the prefabricated reinforced concrete beam is difficult to be accurately positioned and centered and adjusted in elevation once being hoisted to the top of a bracket of the reinforced concrete column due to the great weight of the prefabricated reinforced concrete beam. If the prefabricated reinforced concrete beam cannot be hoisted in place at one time, the prefabricated reinforced concrete beam needs to be hoisted by the hoisting tool and then centering operation is carried out again. Due to the difference of construction capacity of constructors, the process may need to be repeated, which not only occupies the machine class of the hoisting machine and has high cost, but also has low efficiency.
Disclosure of Invention
The invention provides a method for quickly positioning a prefabricated reinforced concrete beam on the top surface of a reinforced concrete column, which aims to solve the problems that the prefabricated reinforced concrete beam is not easy to center and has low efficiency in the positioning process of the top surface of the reinforced concrete column in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for quickly positioning a precast reinforced concrete beam is characterized by comprising the following steps:
1) in the prefabricating stage of the reinforced concrete column, a sleeve is embedded in the top surface of the bracket of the prefabricated reinforced concrete column, and an adjustable bolt is arranged in the sleeve;
2) when the prefabricated reinforced concrete beam is hoisted in place, firstly fixedly placing 2-5 round steel on the top surface of the bracket of the prefabricated reinforced concrete column, hoisting the prefabricated reinforced concrete beam to the top surface of the bracket of the prefabricated reinforced concrete column, and then rolling the round steel to adjust the horizontal position of the beam;
3) after the horizontal position of the precast reinforced concrete beam is adjusted, the elevation of the top of the precast reinforced concrete beam is vertically finely adjusted by adjusting the height of the adjustable bolt in the embedded sleeve.
The invention discloses a method for quickly positioning a precast reinforced concrete beam, which is further characterized by comprising the following steps: after the precast reinforced concrete beam is horizontally aligned with the precast reinforced concrete column, the height of the adjustable bolt in the embedded sleeve of the top surface of the column bracket is respectively adjusted through tools such as a wrench and the like so as to vertically finely adjust the elevation of the top of the precast reinforced concrete beam, and the problem that the elevation of the top of the beam and the inclination of the top of the beam caused by construction errors cannot meet the design and acceptance requirements is solved.
The invention discloses a method for quickly positioning a precast reinforced concrete beam, which is further characterized by comprising the following steps: after the adjustable bolt top surface tightly supports the prefabricated reinforced concrete beam, the round steel fixedly placed on the top surface of the bracket of the prefabricated reinforced concrete column can be removed, and the adjustable bolt top surface is used for installing other prefabricated components. And then, for the reinforced concrete beam column rigid connection joint, connecting the steel bars in the prefabricated reinforced concrete beam at the connection joint with the steel bars in the prefabricated reinforced concrete column from the middle connecting piece at the prefabricated reinforced concrete beam column rigid connection joint in sequence and symmetrically outwards, and finishing the steel bar connection construction of the prefabricated reinforced concrete beam column rigid connection joint.
The invention discloses a method for quickly positioning a precast reinforced concrete beam, which is further characterized by comprising the following steps: the pre-buried sleeve can be directly selected from a straight thread standard sleeve, and the diameter of the sleeve can be set to be 25-32 mm; the positioning of the embedded sleeves on the top surfaces of the brackets of the prefabricated reinforced concrete columns can be symmetrically arranged at intervals of 200-250 mm according to the width of the prefabricated reinforced concrete beams.
The invention discloses a method for quickly positioning a precast reinforced concrete beam, which is further characterized by comprising the following steps: the adjustable bolt can be M24-M30; and reinforcing steel bars with the diameter phi of 25-32 mm can also be selected to process the screw ends, and the screw caps are made into circular arc shapes.
The invention discloses a method for quickly positioning a precast reinforced concrete beam, which is further characterized by comprising the following steps: the diameter of the round steel can be 28-40 mm, and the round steel can also be replaced by a steel pipe with the same outer diameter, and the length of the round steel does not exceed the extending length of the column bracket and is generally 200-300 mm; the quantity of round steel is confirmed according to prefabricated reinforced concrete beam width, generally is 2 ~ 5.
Compared with the prior art, the invention has the advantages that:
the invention is further described with reference to the following figures and detailed description. But not to limit the scope of the invention.
Drawings
FIG. 1 is a schematic diagram showing the adjustment of the horizontal position of a precast reinforced concrete beam of the present invention after the precast reinforced concrete beam is placed on a bracket of a reinforced concrete column;
FIG. 2 is a cross-sectional view of FIG. 1;
fig. 3 is a schematic diagram of the reinforced concrete precast beam in fig. 1 after the elevation and the inclination are adjusted after the reinforced concrete precast beam is placed on a bracket of a reinforced concrete column.
The reference symbols shown in the figures are: the prefabricated reinforced concrete beam-column rigid connection node comprises 1-a prefabricated reinforced concrete column, 2-a prefabricated reinforced concrete beam, 3-a prefabricated reinforced concrete column bracket, 4-a pre-embedded sleeve, 5-an adjustable bolt, 6-round steel, 7-a prefabricated reinforced concrete beam internal reinforcement, 8-a prefabricated reinforced concrete column internal reinforcement and 9-a prefabricated reinforced concrete beam-column rigid connection node.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in the attached drawings 1 to 3, the prefabricated reinforced concrete beam provided by the invention needs to be quickly positioned on the top surface of a reinforced concrete column by embedding a sleeve 4 on the top surface of a column bracket 3 of the prefabricated reinforced concrete column 1, arranging an adjustable bolt 5 in the sleeve, and fixedly placing round steel 6 on the top surface of the column bracket 3, wherein the round steel 6 is adjustable round steel. The steel bars 7 in the prefabricated reinforced concrete beam need to be in rigid connection with the steel bars 8 in the prefabricated reinforced concrete column through the prefabricated reinforced concrete beam column rigid connection joint 9.
The method for quickly positioning the precast reinforced concrete beam on the top surface of the precast reinforced concrete column provided by the invention comprises the following steps: at the prefabricated stage in mill, before concreting, set up 2 embedded sleeves 4 at 3 top surfaces of the post bracket of prefabricated reinforced concrete post 1, the supporting bolt 5 with adjustable setting in embedded sleeve 4.
Secondly, in the field installation stage, the prefabricated reinforced concrete column 1 is placed in place firstly, and then the prefabricated reinforced concrete beam 2 is hoisted; before the precast reinforced concrete beam 2 is in place, round steel 6 is required to be placed at the position, corresponding to the precast reinforced concrete beam, on the top surface of the column bracket 3. After the precast reinforced concrete beam 2 is hung on the top surface of the bracket 3 of the reinforced concrete column, the horizontal position of the beam is adjusted in a rolling mode.
After the prefabricated reinforced concrete beam 2 is horizontally aligned with the prefabricated reinforced concrete column 1, the height of an adjustable bolt 5 in a pre-embedded sleeve 4 on the top surface of a bracket 3 of the reinforced concrete column on two sides of the beam end of the reinforced concrete beam 2 is respectively adjusted through a wrench and other tools, so that the top elevation of the prefabricated reinforced concrete beam 2 is vertically finely adjusted, and the problems that the beam top elevation and the beam top inclination degree cannot meet the design and acceptance requirements due to construction errors are solved; for the prefabricated reinforced concrete beam-column rigid connection joint 9, the horizontal and vertical positions of the reinforced bar connecting pieces at the joint are ensured to be aligned by adjusting through the method.
After the prefabricated reinforced concrete beam 2 is supported by the adjustable bolt 5, the round steel 6 fixedly placed on the top surface of the bracket 3 of the reinforced concrete column can be removed for installation of other prefabricated components.
And then, starting from the intermediate connecting piece at the prefabricated reinforced concrete beam column rigid connection joint 9, sequentially and symmetrically outwards connecting the prefabricated reinforced concrete beam inner steel bars 7 at the connection joint with the prefabricated reinforced concrete column inner steel bars 8, and finishing the steel bar connection construction of the prefabricated reinforced concrete beam column rigid connection joint 9.
And finally, pouring the secondary grouting material into the connecting gap between the prefabricated reinforced concrete beam 2 and the prefabricated reinforced concrete column 1 to form a whole, so as to complete the connection of the whole prefabricated reinforced concrete beam column.
Fig. 3 shows a schematic diagram of the adjustable bolt 5 after adjusting the beam top elevation and the beam top inclination of the reinforced concrete beam 2 on the top surface of the column bracket 3.
The embedded sleeve 4 can be directly a straight thread standard sleeve meeting the requirements of sleeve for steel bar mechanical connection JG/T163-2013, and the diameter of the sleeve can be phi 25-32. The sleeve 4 can be according to precast beam 2's width at the location of 3 top surfaces of bracket, and the interval 200 ~ 250mm symmetry sets up.
The adjustable bolt 5 can be an M24-M30 bolt meeting the requirements of the hexagonal bolt full thread C class GB/T5782-2016; the HRB400 steel bars with the diameter phi of 25-32 can also be selected to be processed into screw ends by a rib stripping and rolling straight thread process, the top ends of the HRB400 steel bars are processed by welding steel plates with corresponding thicknesses according to GB/T5782, and in order to reduce friction, the screw caps are made into circular arc shapes.
The diameter of the round steel 6 can be 28-40 mm, and the round steel can be replaced by a steel pipe with the same outer diameter, and the length of the round steel can be no more than the extending length of the bracket 3, and is generally 200-300 mm.
5 top surfaces of bolt with adjustable support tightly and live prefabricated reinforced concrete roof beam 2 and adjust perpendicular elevation after, before prefabricated reinforced concrete roof beam 2 and 1 connected node of prefabricated reinforced concrete post were not poured into with the secondary grout and are connected into whole, also can be in the gap of 3 top surfaces of post bracket plug into the steel backing plate, help bolt with adjustable 5 undertakes the pressure that the beam-ends produced because of the dead weight.
Claims (6)
1. A method for quickly positioning a precast reinforced concrete beam is characterized by comprising the following steps:
1) in the prefabricating stage of the reinforced concrete column, a sleeve is embedded in the top surface of the bracket of the prefabricated reinforced concrete column, and an adjustable bolt is arranged in the sleeve;
2) when the prefabricated reinforced concrete beam is hoisted in place, firstly fixedly placing 2-5 round steel on the top surface of the bracket of the prefabricated reinforced concrete column, hoisting the prefabricated reinforced concrete beam to the top surface of the bracket of the prefabricated reinforced concrete column, and then rolling the round steel to adjust the horizontal position of the beam;
3) after the horizontal position of the precast reinforced concrete beam is adjusted, the elevation of the top of the precast reinforced concrete beam is vertically finely adjusted by adjusting the height of the adjustable bolt in the embedded sleeve.
2. A method of quickly setting a precast reinforced concrete beam according to claim 1, wherein: the pre-buried sleeve is a straight thread standard sleeve, and the diameter of the sleeve is 25-32 mm.
3. A method of quickly setting a precast reinforced concrete beam according to claim 1, wherein: the distance between the embedded sleeves and the top surface of the bracket of the prefabricated reinforced concrete column is 200-250 mm and the embedded sleeves are symmetrically arranged.
4. A method of quickly setting a precast reinforced concrete beam according to claim 1, wherein: the adjustable bolt is an M24-M30 bolt; or selecting a steel bar with the diameter phi of 25-32 mm to process the screw end.
5. A method of quickly setting a precast reinforced concrete beam according to claim 1, wherein: the length of the round steel is 200-300 mm; the number of the round steel is 2-5.
6. A method of quickly setting a precast reinforced concrete beam according to claim 1, wherein: after the adjustable bolt top surface tightly supports the prefabricated reinforced concrete beam, the round steel fixedly placed on the top surface of the bracket of the prefabricated reinforced concrete column is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011089674.5A CN112376918A (en) | 2020-10-13 | 2020-10-13 | Method for quickly positioning precast reinforced concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011089674.5A CN112376918A (en) | 2020-10-13 | 2020-10-13 | Method for quickly positioning precast reinforced concrete beam |
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| Publication Number | Publication Date |
|---|---|
| CN112376918A true CN112376918A (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011089674.5A Pending CN112376918A (en) | 2020-10-13 | 2020-10-13 | Method for quickly positioning precast reinforced concrete beam |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11172921A (en) * | 1997-12-08 | 1999-06-29 | Kumagai Gumi Co Ltd | Positioning device of beam |
| CN1837485A (en) * | 2006-04-19 | 2006-09-27 | 中国建筑第二工程局 | Space-precasting translation-emplacing method for bridge construction |
| CN101914896A (en) * | 2010-06-29 | 2010-12-15 | 中铁十局集团有限公司 | Precast beam artificial sliding boat translation system |
| CN204282843U (en) * | 2014-12-04 | 2015-04-22 | 中冶天工集团有限公司 | The sliding hoisted in position device of steel girder erection in a kind of stiffness combination construction |
| CN207499504U (en) * | 2017-11-29 | 2018-06-15 | 中建科技（福州）有限公司 | A kind of efficiently construction prefabricated frame is set a roof beam in place erecting device |
| CN207959982U (en) * | 2017-12-25 | 2018-10-12 | 中建三局绿色产业投资有限公司 | A kind of assembling frame structural beams top mark height regulating device |
| CN109812028A (en) * | 2019-03-27 | 2019-05-28 | 中建四局第一建筑工程有限公司 | A kind of bracket device and its application method convenient for precast beam rapid construction |
| CN110093977A (en) * | 2019-04-30 | 2019-08-06 | 广东联城住工装备信息科技有限公司 | Prefabricated component mounting structure and its installation method |
-
2020
- 2020-10-13 CN CN202011089674.5A patent/CN112376918A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11172921A (en) * | 1997-12-08 | 1999-06-29 | Kumagai Gumi Co Ltd | Positioning device of beam |
| CN1837485A (en) * | 2006-04-19 | 2006-09-27 | 中国建筑第二工程局 | Space-precasting translation-emplacing method for bridge construction |
| CN101914896A (en) * | 2010-06-29 | 2010-12-15 | 中铁十局集团有限公司 | Precast beam artificial sliding boat translation system |
| CN204282843U (en) * | 2014-12-04 | 2015-04-22 | 中冶天工集团有限公司 | The sliding hoisted in position device of steel girder erection in a kind of stiffness combination construction |
| CN207499504U (en) * | 2017-11-29 | 2018-06-15 | 中建科技（福州）有限公司 | A kind of efficiently construction prefabricated frame is set a roof beam in place erecting device |
| CN207959982U (en) * | 2017-12-25 | 2018-10-12 | 中建三局绿色产业投资有限公司 | A kind of assembling frame structural beams top mark height regulating device |
| CN109812028A (en) * | 2019-03-27 | 2019-05-28 | 中建四局第一建筑工程有限公司 | A kind of bracket device and its application method convenient for precast beam rapid construction |
| CN110093977A (en) * | 2019-04-30 | 2019-08-06 | 广东联城住工装备信息科技有限公司 | Prefabricated component mounting structure and its installation method |
Non-Patent Citations (1)
| Title |
|---|
| 郭汉生: "《小型水利工程施工技术》", 31 March 1980 * |
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Application publication date: 20210219 |