CN111677293A - Steel column beam hoisting construction method - Google Patents
Steel column beam hoisting construction method Download PDFInfo
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- CN111677293A CN111677293A CN202010531917.XA CN202010531917A CN111677293A CN 111677293 A CN111677293 A CN 111677293A CN 202010531917 A CN202010531917 A CN 202010531917A CN 111677293 A CN111677293 A CN 111677293A
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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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/32—Columns; Pillars; Struts of metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a steel column beam hoisting construction method, which comprises the following process flows of: the method comprises the steps of component, equipment and personnel preparation → paying off and line inspection → acceptance of embedded bolts and foundation surface treatment → central line and height marking line of the component → installation of a first section of steel column → correction and acceptance of the first section of steel column → ultrasonic flaw detection → installation of a second section of steel column → correction and acceptance of the second section of steel column → ultrasonic flaw detection → installation of a first section of steel beam → spot welding of the beam and the column joint, bolt connection → correction and acceptance of the second section of steel beam → ultrasonic flaw detection → installation of a third section of steel beam → spot welding of the beam and the column joint, bolt connection → correction and acceptance of the third section of steel beam → ultrasonic flaw detection → installation of a sporadic component → preparation of the next water-saving section. The method is efficient and safe and is worthy of popularization.
Description
Technical Field
The invention relates to the technical field of stiff column beam construction, in particular to a steel column beam hoisting construction method.
Background
In the building engineering, the structural form of the steel reinforced concrete rigid steel column and the steel beam is a novel component form, and the construction of the rigid column and the beam requires accurate positioning of embedded parts, high installation precision and reliable welding quality. And the surrounding site of the construction engineering construction site is narrow, and the large-tonnage crane is difficult to unfold. And the tower crane on site is difficult to cover all the column beam construction area. In addition, during construction of the type of engineering, the components do not have a storage yard, and all the components need to be shipped in a matched manner according to actual needs. Therefore, the construction is characterized by ensuring the accurate positioning of the components in the embedded parts. The installation accuracy of the column beam is within the error range of the standard requirement, the welding quality is reliable, and the standard requirement is met. The construction difficulty is to overcome the difficulties of site and measure and to finish the installation of the steel structural section steel column and beam. In addition, precision protection and cable wind pulling after the section steel columns and the beams are in place are also another characteristic to be considered in construction.
Disclosure of Invention
The invention aims to provide a steel column beam hoisting construction method to overcome the defects of the existing construction method.
The technical scheme of the invention is as follows:
a steel column beam hoisting construction method comprises the following process flows: the method comprises the steps of component, equipment and personnel preparation → paying off and line inspection → acceptance of embedded bolts and foundation surface treatment → central line and height marking line of the component → installation of a first section of steel column → correction and acceptance of the first section of steel column → ultrasonic flaw detection → installation of a second section of steel column → correction and acceptance of the second section of steel column → ultrasonic flaw detection → installation of a first section of steel beam → spot welding of the beam and the column joint, bolt connection → correction and acceptance of the second section of steel beam → ultrasonic flaw detection → installation of a third section of steel beam → spot welding of the beam and the column joint, bolt connection → correction and acceptance of the third section of steel beam → ultrasonic flaw detection → installation of a sporadic component → preparation of the next water-saving section.
Compared with the prior art, the construction method can solve the problems that the surrounding field of a construction site is narrow and small, a large-tonnage crane is difficult to unfold, a field tower crane is difficult to cover all the column-beam construction area GaOhe and the like, the hoisting construction of the steel column beam is completed in a limited space, and the method is efficient and safe and is worthy of popularization.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the following examples.
Example 1:
a certain project is in a structural form of steel reinforced concrete rigid steel columns and steel beams. Wherein the number of the H-shaped steel structural columns is 14, and the elevation is-5.450-23.000 m; when the steel column is installed, the steel column is installed in three sections, wherein the elevation from-5.450 m to 6.570 m is the first section, the elevation from 6.570 m to 9.470 m or 10.850 m is the second section, and the elevation from 10.850 m to 23.000 m is the third section. The maximum single amount of a single steel column is 3.3 tons. The steel structure beam of the section steel has three layers. When in hoisting, the hoisting is carried out layer by layer, and the maximum single weight is 3.3 tons.
1 construction requirements
1.1 measurement and Crane data
Through carefully measuring the available field on the site, in order to fully exert the mechanical potential of the tower crane on the site, the truck crane is planned to be matched with the available field to complete the on-site splicing and installation of the steel column beam. During installation, 2 AC160-2 type truck cranes are arranged on the periphery of a foundation pit on site, and the truck cranes have an arm length of 63.9m and can cover hoisting areas of stiff steel columns and steel beams.
1.2 Assemble requirements
And the precision of the steel column beam in splicing is practically ensured by making a fully applicable mounting jig.
1.3 mounting and positioning measures
And a positioning hole or a positioning bolt for installation is reserved in the deep design and the processing and manufacturing of the steel column beam to ensure the precision requirement in installation.
The embedded part is accurately positioned, the installation precision of the column beam is within the error range of the standard requirement, the welding quality is reliable, and the standard requirement is met. The difficulty of the engineering construction is to overcome the difficulties of site and measure and finish the installation of the steel-structure section steel column and the beam. The precision protection and the cable wind pulling after the section steel column is in place are also another technical guarantee condition to be considered in the construction.
2 construction process technology
2.1 measurement of pay-off parameters
And encrypting the axis and the elevation control points on site according to the original axis control points and the elevation control points, and then measuring and releasing the axis control lines and the elevation control points for installing the embedded parts according to the control lines.
2.2 Anchor bolt installation parameters
After the support is fixed, whether the axis and the hole position of the anchor bolt meet the requirements of design drawings is retested, the anchor bolt is installed after rechecking is carried out, the elevation of the top of the anchor bolt is adjusted, and the support and the surrounding main ribs are welded and fixed.
2.3 Foundation bolt mouth protection
After the foundation bolts are installed, collision and damage are strictly prohibited, and the threads are cleaned up before the steel column is installed, so that the steel column is ensured to be in place.
2.4 Process flow
Member, equipment and personnel preparation → paying-off and line testing (axis, elevation) → checking and accepting of embedded bolts and treating foundation surface → central line and elevation line of member → installing first section of steel column → correcting and accepting first section of steel column → ultrasonic testing → installing second section of steel column → correcting and accepting second section of steel column → ultrasonic testing → installing 9.470 m layer steel beam → welding beam and column node, bolting → 9.470 m layer steel beam correcting and accepting → ultrasonic testing → installing 10.850 m layer steel beam → welding beam and column node, bolting → 10.850 m layer steel beam correcting and accepting → ultrasonic testing → installing third section steel column → correcting and accepting third section steel column → installing 21.470 m layer steel beam → beam and column node, bolting → 21.470 m layer steel beam correcting and accepting → ultrasonic testing → installing null member → installing next water-saving section preparation work
2.5 construction method
The steel column and the steel beam are manufactured by sectional processing in a factory and are installed in a hoisting and butt joint mode on site. And the steel columns and the steel beams on site are only subjected to butt welding, and other processing and manufacturing are not performed.
2.6 steel column hoisting construction method
The accuracy of the post position depends on the accuracy of the embedded bolt position. The elevation deviation of the embedded bolt is controlled within +5mm, and the deviation of the positioning axis is controlled within +/-2 mm. And after the embedded bolts and the elevation of the top surface of the foundation are qualified, the structure is hoisted.
The lifting point is arranged at the position of the connecting lug plate welded in advance, and in order to prevent the lifting lug from deforming during lifting, a special lifting appliance is adopted for clamping, and a single-machine rotation method is adopted for lifting. Before hoisting, the steel column should be padded with sleepers to avoid the contact of the bottom of the column and the ground during hoisting, and the column end cannot be dragged on the ground during hoisting.
When the steel column is hung 200mm above the steel column in position, the machine should be stopped stably, and the steel column slowly falls down after being aligned with the bolt holes and the cross lines, so that the center lines of the four sides of the steel column are aligned with the cross axis of the foundation
Before the hook of the crane is released, angle steel 75 x 6000 is adopted for fixing, and theodolites are arranged in two vertical axial directions of the steel column to perform preliminary measurement and correction on the steel column.
The bottom of the column is in place as far as possible in one step when the steel column is installed, and a small amount of correction can be performed by using a jack and an adjusting nut method.
2.7 hoisting of second section steel column
The hoisting method of the second section of steel column is the same as that of the first section of steel column.
1) Second section steel column axis adjustment
In order to prevent the upper and lower columns from being staggered, the central lines of the upper and lower columns are superposed as much as possible. The deviation of the central line of the steel column is adjusted within the range of 3mm every time, and if the deviation is too large, the adjustment is carried out for 2-3 times.
The positioning axis of each section of steel column absolutely does not allow the positioning axis of the next section of steel column to be used, and the positioning axis of the next section of steel column is guided to the high altitude from a ground control line, so that the installation of each section of steel column is ensured to be correct, and overlarge accumulated errors are avoided.
2) Second section steel column verticality correction
The key point of the steel column verticality correction is the preliminary inspection of the relevant size of the steel column. The column top perpendicularity deviation of the lower-layer steel column is the synthesis of the bottom axis, the displacement, the welding deformation, the sunlight influence, the perpendicularity correction, the elastic deformation and the like of the upper-section steel column. Partial errors can be eliminated by reserving a verticality deviation value. When the reserved value is larger than the accumulated deviation value of the lower section column, only the accumulated deviation value is reserved, otherwise, a reserved value is reserved, and the direction of the reserved value is opposite to the direction of the deviation.
And (3) empirical value determination: the general welding line shrinkage value of the beam and the column is less than 2 mm; the column-to-column weld shrinkage value is generally 3.5mm, and the transverse shrinkage value of the thick steel plate weld can be calculated according to the following formula:
S＝K·A/T (6-1)
in the formula: s-transverse shrinkage value of weld, mm;
a-the cross-sectional area of the weld, mm;
t-weld thickness, including penetration, mm;
k, constant, is generally 0.1.
Sun temperature effect: the deviation change is in direct proportion to the slenderness ratio and the temperature difference of the column, and is directly related to the section form of the steel column and the thickness of the steel plate. Obvious observation difference occurs at 9-10 am and 14-15 pm, observation time is well controlled, and temperature influence is reduced.
3) Adjustment of steel column elevation
After each section of steel column is installed, the elevation of the column top is measured in a real-time mode, when the elevation error exceeds 6mm, adjustment needs to be carried out, and the multi-purpose low-carbon steel plate is cushioned to meet the specified requirements. If the error is too large (larger than 20mm), the adjustment is not suitable for one time, a part can be adjusted first, and the adjustment is carried out again for the next time, otherwise, the installation of the support and the surface elevation of the steel beam are influenced by the excessive adjustment for one time. The elevation of the middle frame column should be slightly higher, because the steel frame installation period is long, the structure dead weight is continuously increased, the structure load born by the middle column is larger, and the foundation settlement is also large.
The first section column and the second section column are fixed by bolts and are connected in a welding mode, and ultrasonic inspection is conducted on welding seams. Note that: the bolt hole for temporarily connecting the lug plate is 4mm larger than the diameter of the bolt, and the bolt hole is expanded enough to adjust the manufacturing error of the steel column to be-1 to +5 mm.
2.8 steel beam hoisting construction method
Before the steel beam is hoisted, the elevation and the distance between the columns are checked at the corbels of the columns, and the grab rail and the grab rope are installed on the beam, so that after the main beam is hoisted in place, the grab rope and the steel column are fastened firmly to ensure the safety of constructors.
Typically, holes are made in the flanges of the steel beam as hoisting points, the location of which depends on the span of the steel beam. In order to accelerate the hoisting speed, a plurality of secondary beams with smaller weight and other small beams are hoisted at one time by utilizing a multi-head sling.
In order to reduce overhead operation, ensure quality and accelerate hoisting progress, the beams and the columns can be integrally hoisted after being assembled into a bent frame on the ground. When the hoisting of a section of steel frame is finished, the error inspection and correction of the hoisted column and beam are needed. The correction method refers to the correction of the single-layer steel structure installation engineering column and beam.
And after the beam is corrected, temporarily fixing the beam by using a high-strength bolt, and correcting the column. And after the beam and the column are corrected, the high-strength bolt is fastened and connected, the column joint and the beam joint are welded, and the welding seam is subjected to ultrasonic inspection.
2.9 operating requirements of section steel column and beam
(1) High-strength bolts, studs, welding rods, welding wires and the like are stacked on a goods shelf of a storehouse, and the number of stacked layers is not more than four at most.
(2) The stacking of the steel members requires that the site is flat, firm, clean and dry, the stacking is neat, sleepers are laid, and deformation prevention and rust prevention are achieved.
(3) The finished member cannot be welded and cut at will, and the member is piled in the air. And immediately cleaning the welding seams and the joint plates which are qualified after construction and are sealed according to requirements.
(4) When the hoisting steel structure is in place, the hoisting steel structure is slowly descended and cannot collide with the installed steel structure.
(5) The manufactured steel columns and the like need to be carefully managed so as to prevent unreasonable bending deformation of the placed pad base points.
3 request for examination
(1) The steel member should meet the design requirements, specifications. The deformation of the steel member caused by transportation, stacking, hoisting and the like should be corrected and repaired.
(2) The design requires tight-pushing nodes, the contact surface should not be less than 70% tight, and the maximum clearance of the edge should not be more than 0.8 mm.
(3) The surface of the steel structure should be clean, and the main surface of the structure should not have scars, silt and other dirt.
(4) When the steel member is installed on the concrete column, the deviation of the support center of the steel member to the positioning axis is not more than l0 mm; when large concrete roof panels are used, the deviation in the spacing of the steel beams (or trusses) should not be greater than 10 mm.
(5) The steel platform, the steel ladder and the railing in the multi-layer and high-rise steel structure are arranged according to the regulations of the existing national standard 'fixed steel vertical ladder' (GB4053.1), 'fixed steel inclined ladder' (GB4053.2), 'fixed protective railing' (GB4053.3) and 'fixed steel platform' (GB 4053.4).
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A steel column beam hoisting construction method is characterized by comprising the following process flows: the method comprises the steps of component, equipment and personnel preparation → paying off and line inspection → acceptance of embedded bolts and foundation surface treatment → central line and height marking line of the component → installation of a first section of steel column → correction and acceptance of the first section of steel column → ultrasonic flaw detection → installation of a second section of steel column → correction and acceptance of the second section of steel column → ultrasonic flaw detection → installation of a first section of steel beam → spot welding of the beam and the column joint, bolt connection → correction and acceptance of the second section of steel beam → ultrasonic flaw detection → installation of a third section of steel beam → spot welding of the beam and the column joint, bolt connection → correction and acceptance of the third section of steel beam → ultrasonic flaw detection → installation of a sporadic component → preparation of the next water-saving section.
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| CN202010531917.XA CN111677293A (en) | 2020-06-11 | 2020-06-11 | Steel column beam hoisting construction method |
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| CN202010531917.XA CN111677293A (en) | 2020-06-11 | 2020-06-11 | Steel column beam hoisting construction method |
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| CN111677293A true CN111677293A (en) | 2020-09-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232799A (en) * | 2021-12-31 | 2022-03-25 | 中铁五局集团有限公司 | Station layer for transportation hub and method for hoisting steel beams below station layer |
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2020
- 2020-06-11 CN CN202010531917.XA patent/CN111677293A/en active Pending
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114232799A (en) * | 2021-12-31 | 2022-03-25 | 中铁五局集团有限公司 | Station layer for transportation hub and method for hoisting steel beams below station layer |
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Application publication date: 20200918 |
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