CN115262764B - Large-space special-shaped curtain wall steel structure and hoisting construction method thereof - Google Patents
Large-space special-shaped curtain wall steel structure and hoisting construction method thereof Download PDFInfo
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- CN115262764B CN115262764B CN202210812100.9A CN202210812100A CN115262764B CN 115262764 B CN115262764 B CN 115262764B CN 202210812100 A CN202210812100 A CN 202210812100A CN 115262764 B CN115262764 B CN 115262764B
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Classifications
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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
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/88—Curtain walls
-
- 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
-
- 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
- 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
- E04G21/162—Handles to carry construction blocks
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to a large-space special-shaped curtain wall steel structure and a hoisting construction method thereof, wherein the large-space special-shaped curtain wall steel structure comprises a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure; the landscape wall steel structures are arranged in a four-corner symmetrical mode, the middle shaft of the landscape wall steel structure on one side is fixedly connected with the outer side of the inlet steel structure, the top edge of the landscape wall steel structure is fixedly connected with the outer side edge of the roof steel structure, and the inner side of the shaft center of the roof steel structure is fixedly connected with the top edge of the atrium steel structure. The problem of the difficult hoist and mount of large space abnormal shape curtain steel construction is solved, a hoist and mount construction method of large space abnormal shape curtain steel construction is provided, easy operation is easy, guarantee safe and reliable, can be according to different construction processes and construction environment, nimble adjustment construction scheme has not only improved the efficiency of curtain board hoist and mount for the curtain construction is quick orderly, has still saved numerous labour cost, has reduced accident rate.
Description
Technical Field
The invention relates to the field of building construction, in particular to a large-space special-shaped curtain wall steel structure and a hoisting construction method thereof.
Background
The curtain wall belongs to building decoration engineering, is an outer wall protection wall of a building, is not bearing, is hung like a curtain, is also called a hanging wall, is a light wall body with decoration effect commonly used for modern high-rise buildings and large-scale buildings, and consists of a structural frame and embedded plates, and does not bear the load and the action of a main structure.
However, in the prior art, along with the rapid development of the building market, new buildings, new materials and new processes at home and abroad are continuously emerging, the design of building curtain walls is increasingly diversified, the traditional hoisting scheme is mainly used for building materials with smaller weight/volume, the traditional hoisting scheme is extremely inapplicable to special-shaped structures with large weight and cannot meet the requirement of hoisting load, and the special-shaped structures are extremely difficult to fix the balance position of a hoisting point because the gravity center is not easy to determine, so that the traditional hoisting technology cannot carry out the hoisting construction of special-shaped structures with large weight/volume or complex structure.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a large-space special-shaped curtain wall steel structure and a hoisting construction method thereof, solves the problem of difficult hoisting of the large-space special-shaped curtain wall steel structure, and provides the hoisting construction method of the large-space special-shaped curtain wall steel structure, which is simple and easy to operate, ensures safety and reliability, can flexibly adjust a construction scheme according to different construction processes and construction environments, not only improves the hoisting efficiency of curtain wall plates, ensures that curtain wall construction is quick and orderly, but also saves a plurality of labor costs, and reduces accident occurrence rate.
The technical scheme for achieving the purpose is as follows:
the invention provides a large-space special-shaped curtain wall steel structure which comprises a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure;
the landscape wall steel structures are arranged in a four-corner symmetrical mode, the middle shaft of the landscape wall steel structure on one side is fixedly connected with the outer side of the inlet steel structure, the top edge of the landscape wall steel structure is fixedly connected with the outer side edge of the roof steel structure, and the inner side of the shaft center of the roof steel structure is fixedly connected with the top edge of the atrium steel structure.
The large-space special-shaped curtain wall steel structure adopts a modularized design, is convenient to install and disassemble, is convenient and easy to construct and operate, can be repeatedly used, is more green and scientific, realizes simple and easy operation, ensures safety and reliability, can flexibly adjust a construction scheme according to different construction processes and construction environments, not only improves the efficiency of curtain wall plate hoisting, ensures that curtain wall construction is quick and orderly, but also saves a plurality of labor costs and reduces accident occurrence rate.
The invention further improves the large-space special-shaped curtain wall steel structure, which comprises a box column and a plurality of square steel beams arranged at the bottom of the box column, wherein the bottom of the roof steel structure is a floor structure.
The large-space special-shaped curtain wall steel structure is further improved in that the inlet steel structure comprises a plurality of first vertical face trusses, first plane trusses horizontally connected between the first vertical face trusses, gate trusses fixed between the first vertical face trusses and a plurality of first supporting rods for supporting the gate trusses.
The large-space special-shaped curtain wall steel structure is further improved in that the atrium steel structure comprises a plurality of second vertical face trusses which are vertically arranged on the ground, a second plane truss which is horizontally connected between the plurality of second vertical face trusses, and a second supporting rod which is supported between the second vertical face trusses and the second plane truss.
The invention further improves the large-space special-shaped curtain wall steel structure, which is characterized in that the well pipe wall steel structure comprises a plurality of third vertical face trusses which are vertically arranged on the ground, a third plane truss which is horizontally connected between the third vertical face trusses, and a third supporting rod which is supported between the third vertical face trusses and the second plane truss.
The invention provides a hoisting construction method of a large-space special-shaped curtain wall steel structure, which comprises the following steps:
s1, preparing construction;
s2, measuring and lofting;
s3, curtain wall steel structure construction: fixedly connecting a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure;
s5, antiseptic spraying treatment: coating anticorrosive paint on the surfaces of the roof steel structure, the atrium steel structure, the entrance steel structure and the landscape wall steel structure;
s6, fireproof spraying treatment: coating fireproof paint on the surfaces of the roof steel structure, the atrium steel structure, the entrance steel structure and the landscape wall steel structure;
s7, checking and accepting.
The invention relates to a hoisting construction method of a large-space special-shaped curtain wall steel structure, which is further improved in that when constructing a roof steel structure, the hoisting construction method further comprises the following steps:
s300, construction flow of a roof steel structure: construction preparation, axis retest, steel column hoisting, main beam hoisting, secondary beam hoisting, structure welding stabilization, overhanging main beam hoisting, overhanging secondary beam hoisting, structure welding seam repair welding ending;
s301, setting a steel column hanging point: the steel column hanging point is arranged at the top of the steel column, at least 4 temporary connecting plates are used as hanging points, a ladder stand is bound before the steel column is lifted, a hanging basket is welded at a position 1.3m away from the top of the steel column by adopting small-section angle steel, and is hung above a steel structure column or beam and temporarily fixed by adopting bolts;
s302, installing a first layer steel column: retesting the embedded part before installation, and paying off on the basis; adjusting nuts on the screw rods according to the bottom elevation of the steel column, and then installing the steel column in place;
when the steel column is lifted, the crane is pivoted while hooking, so that the steel column is vertically lifted off the ground;
after the steel column is hoisted in place by a crane, penetrating a steel column bottom plate into a foundation anchor bolt, placing the foundation anchor bolt on an adjusted nut, aligning and fitting the central lines of four sides of the column with the central line of a foundation paying-off line, and when the central line is aligned or the deviation is controlled within a standard allowable range, penetrating a pressing plate, and screwing down a bolt;
s303, hoisting an upper layer steel column: the hanging points of the upper layer steel column are arranged at the upper part of the steel column, four temporary connecting lug plates are used as hanging points, and the hanging points are arranged at two sides of the end head of the column and are welded and fixed with the steel structure column;
the top surface elevation and axis deviation of the lower section steel column are controlled within the specification, the steel column distortion value is controlled within the specification, the reverse deviation is returned to the original position when the upper section steel column is hoisted, and the correction is carried out section by section;
after the steel column is hoisted in place, the center line of the steel column is matched with the center line of the lower section of steel column, the movable double clamping plates of the steel column are stably inserted into the corresponding mounting lug plates of the lower section of steel column, the connecting bolts are installed, the temporary connecting clamping plates are connected, and the mounting lug plates are cut off after 2/3 of the welding of the steel column is completed.
The invention relates to a hoisting construction method of a large-space special-shaped curtain wall steel structure, which is further improved in that when an atrium steel structure is constructed, the hoisting construction method further comprises the following steps:
s310, an atrium steel structure process flow: construction preparation, axis retest, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting piece hoisting, and structural welding seam repair welding ending;
s311, hoisting:
a. the first truss is hoisted by the automobile crane, and the 25T automobile crane auxiliary hoisting support piece is reliably connected with the civil engineering structure;
b. hoisting a second truss by using the automobile crane;
c, 25T automobile crane auxiliary hoisting truss inter-truss supporting pieces to form a stable system;
d. and continuing to hoist the truss and the supporting piece until the hoisting construction is completed.
The invention relates to a hoisting construction method of a large-space special-shaped curtain wall steel structure, which is further improved in that when constructing an inlet steel structure, the hoisting construction method further comprises the following steps:
s320, inlet steel structure process flow: construction preparation, axis retest, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting piece hoisting, canopy truss hoisting and structural welding seam repair welding ending;
s321, the trusses are assembled and formed on the ground and hoisted by using an automobile crane, the maximum dead weight of the trusses is 1.2T, and the trusses are hoisted by using a 50T automobile crane.
The invention relates to a hoisting construction method of a large-space special-shaped curtain wall steel structure, which is further improved in that when constructing a landscape wall steel structure, the hoisting construction method further comprises the following steps:
s330, landscape wall steel structure process flow: construction preparation, axis retest, upright column hoisting, wall connecting component installation, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting piece hoisting, canopy truss hoisting, and structural welding seam repair welding ending;
s331, hoisting:
a. the first truss is hoisted by the automobile crane, and the auxiliary hoisting support piece of the tower crane is reliably connected with the civil engineering structure;
b. the second truss is hoisted by the automobile crane, and the auxiliary hoisting support piece of the tower crane is reliably connected with the civil engineering structure;
c. hoisting horizontal trusses among trusses to form a stable system;
d. and the rest trusses and the supporting pieces are hoisted in a similar way;
e. the tower crane lifts the single component until the component lifting is completed.
Drawings
FIG. 1 is a flow chart of a hoisting construction method of a large-space special-shaped curtain wall steel structure.
Fig. 2 is a perspective view of the steel structure of the large-space special-shaped curtain wall of the invention.
Fig. 3 is a perspective view of a roof steel structure of the large-space special-shaped curtain wall steel structure of the invention.
Fig. 4 is an arrangement diagram of an atrium car crane in the hoisting construction method of the large-space special-shaped curtain wall steel structure.
Fig. 5 is a schematic diagram of different weight hoisting modes of the hoisting construction method of the large-space special-shaped curtain wall steel structure.
Fig. 6 is a schematic view of the hoisting of an atrium component in the hoisting construction method of the large-space special-shaped curtain wall steel structure.
Fig. 7 is a schematic diagram of the step of hoisting the atrium component in the hoisting construction method of the large-space special-shaped curtain wall steel structure.
FIG. 8 is a schematic view of the inlet steel structure of the large-space special-shaped curtain wall steel structure of the invention.
Fig. 9 is a view wall steel structure hoisting flow chart of the hoisting construction method of the large-space special-shaped curtain wall steel structure.
1, a roof steel structure; 2. an atrium steel structure; 3. an inlet steel structure; 4. and a landscape wall steel structure.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
Referring to fig. 1, the invention provides a large-space special-shaped curtain wall steel structure and a hoisting construction method thereof, which adopt a modularized design, are convenient to install and disassemble, are convenient and easy to construct and operate, can be repeatedly used, are more green and scientific, and realize simple and easy operation, ensure safety and reliability, flexibly adjust a construction scheme according to different construction processes and construction environments, not only improve the hoisting efficiency of curtain wall plates, enable curtain wall construction to be quick and orderly, but also save a plurality of labor costs and reduce accident occurrence rate. The steel structure of the large-space special-shaped curtain wall is described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a flow chart of a hoisting construction method of a large-space special-shaped curtain wall steel structure. The steel structure of the large-space special-shaped curtain wall of the invention is described below with reference to fig. 1.
As shown in fig. 1 to 9, the large-space special-shaped curtain wall steel structure comprises a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure;
the landscape wall steel structures are arranged in a four-corner symmetrical mode, the middle shaft of the landscape wall steel structure on one side is fixedly connected with the outer side of the inlet steel structure, the top edge of the landscape wall steel structure is fixedly connected with the outer side edge of the roof steel structure, and the inner side of the shaft center of the roof steel structure is fixedly connected with the top edge of the atrium steel structure.
As a preferred embodiment of the invention, the roof steel structure comprises a box column and a plurality of square steel beams arranged at the bottom of the box column, and the bottom of the roof steel structure is a floor structure.
Further, the entrance steel structure comprises a plurality of vertical first vertical face trusses, first plane trusses horizontally connected between the plurality of first vertical face trusses, gate trusses fixed between the first vertical face trusses and a plurality of first supporting rods for supporting the gate trusses.
Further, the atrium steel structure comprises a plurality of second vertical face trusses which are vertically arranged on the ground, a second plane truss which is horizontally connected between the plurality of second vertical face trusses, and a second supporting rod which is supported between the second vertical face trusses and the second plane truss.
Further, the well pipe wall steel structure comprises a plurality of third vertical face trusses which are vertically arranged on the ground, a third plane truss which is horizontally connected between the plurality of third vertical face trusses, and a third supporting rod which is supported between the third vertical face trusses and the second plane truss.
The invention also provides a hoisting construction method of the large-space special-shaped curtain wall steel structure, which comprises the following steps:
s1, preparing construction;
s2, measuring and lofting;
s3, curtain wall steel structure construction: fixedly connecting a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure;
s5, antiseptic spraying treatment: coating anticorrosive paint on the surfaces of the roof steel structure, the atrium steel structure, the entrance steel structure and the landscape wall steel structure;
s6, fireproof spraying treatment: coating fireproof paint on the surfaces of the roof steel structure, the atrium steel structure, the entrance steel structure and the landscape wall steel structure;
s7, checking and accepting.
Further, when constructing roofing steel construction, still include:
s300, construction flow of a roof steel structure: construction preparation, axis retest, steel column hoisting, main beam hoisting, secondary beam hoisting, structure welding stabilization, overhanging main beam hoisting, overhanging secondary beam hoisting, structure welding seam repair welding ending;
s301, setting a steel column hanging point: the steel column hanging point is arranged at the top of the steel column, at least 4 temporary connecting plates are used as hanging points, a ladder stand is bound before the steel column is lifted, a hanging basket is welded at a position 1.3m away from the top of the steel column by adopting small-section angle steel, and is hung above a steel structure column or beam and temporarily fixed by adopting bolts;
s302, installing a first layer steel column: retesting the embedded part before installation, and paying off on the basis; adjusting nuts on the screw rods according to the bottom elevation of the steel column, and then installing the steel column in place;
when the steel column is lifted, the crane is pivoted while hooking, so that the steel column is vertically lifted off the ground;
after the steel column is hoisted in place by a crane, penetrating a steel column bottom plate into a foundation anchor bolt, placing the foundation anchor bolt on an adjusted nut, aligning and fitting the central lines of four sides of the column with the central line of a foundation paying-off line, and when the central line is aligned or the deviation is controlled within a standard allowable range, penetrating a pressing plate, and screwing down a bolt;
s303, hoisting an upper layer steel column: the hanging points of the upper layer steel column are arranged at the upper part of the steel column, four temporary connecting lug plates are used as hanging points, and the hanging points are arranged at two sides of the end head of the column and are welded and fixed with the steel structure column;
the top surface elevation and axis deviation of the lower section steel column are controlled within the specification, the steel column distortion value is controlled within the specification, the reverse deviation is returned to the original position when the upper section steel column is hoisted, and the correction is carried out section by section;
after the steel column is hoisted in place, the center line of the steel column is matched with the center line of the lower section of steel column, the movable double clamping plates of the steel column are stably inserted into the corresponding mounting lug plates of the lower section of steel column, the connecting bolts are installed, the temporary connecting clamping plates are connected, and the mounting lug plates are cut off after 2/3 of the welding of the steel column is completed.
Further, when constructing atrium steel structure, still include:
s310, an atrium steel structure process flow: construction preparation, axis retest, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting piece hoisting, and structural welding seam repair welding ending;
s311, hoisting:
a. the first truss is hoisted by the automobile crane, and the 25T automobile crane auxiliary hoisting support piece is reliably connected with the civil engineering structure;
b. hoisting a second truss by using the automobile crane;
c, 25T automobile crane auxiliary hoisting truss inter-truss supporting pieces to form a stable system;
d. and continuing to hoist the truss and the supporting piece until the hoisting construction is completed.
Further, when constructing the entry steel construction, still include:
s320, inlet steel structure process flow: construction preparation, axis retest, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting piece hoisting, canopy truss hoisting and structural welding seam repair welding ending;
s321, the trusses are assembled and formed on the ground and hoisted by using an automobile crane, the maximum dead weight of the trusses is 1.2T, and the trusses are hoisted by using a 50T automobile crane.
Further, when constructing view wall steel construction, still include:
s330, landscape wall steel structure process flow: construction preparation, axis retest, upright column hoisting, wall connecting component installation, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting piece hoisting, canopy truss hoisting, and structural welding seam repair welding ending;
s331, hoisting:
a. the first truss is hoisted by the automobile crane, and the auxiliary hoisting support piece of the tower crane is reliably connected with the civil engineering structure;
b. the second truss is hoisted by the automobile crane, and the auxiliary hoisting support piece of the tower crane is reliably connected with the civil engineering structure;
c. hoisting horizontal trusses among trusses to form a stable system;
d. and the rest trusses and the supporting pieces are hoisted in a similar way;
e. the tower crane lifts the single component until the component lifting is completed.
The practical implementation operation mode of the hoisting construction method provided by the invention is as follows:
1. construction process flow
Step one, construction preparation: is composed of technical preparation, material preparation and labor preparation, wherein the material preparation comprises material preparation and machine tool preparation.
And step two, measuring and lofting.
And step three, installing a spherical support.
Fourthly, curtain wall steel structure construction: the construction method comprises the following four steps of roof steel structure 1 construction, atrium steel structure 2 construction, entrance steel structure 3 construction and landscape wall steel structure 4 construction.
And fifthly, carrying out anti-corrosion spraying treatment, wherein the anti-corrosion spraying treatment comprises a steel structure processing anti-corrosion coating process and a steel structure on-site anti-corrosion coating process.
Step six, fireproof spraying treatment: the method consists of a fireproof coating construction process and a fireproof coating repair process;
and step seven, checking and accepting.
2. Key points of operation
(1) Preparation for construction
(1) Preparation of the technique
a. Organizing construction technicians carefully learn technical specifications, standards and technical regulations before construction, are familiar with drawings, and know design intent.
b. And organizing a special intersection to technically intersect the construction team.
c. And safety and technical training are carried out on constructors, and technical quality of teams is enhanced.
(2) Material preparation
(1) Material preparation
And (5) entering the field in batches according to a material requirement plan, and storing the field to a specified place after acceptance inspection and acceptance inspection, so as to cover and protect the field. And simultaneously, carrying out spot check tests on various incoming materials.
(2) Implement preparation
According to the construction machine demand plan, the machine lease and purchase plan is made, the check and maintenance work of the incoming use money is made, and the normal operation is ensured.
(3) Labor preparation
a. Organizing worker approach according to the construction plan and the labor requirement plan.
b. The safety of constructor approach is improved. Education works such as quality, fire prevention, civilization construction and the like are performed, pre-post training is performed, key technical works must be authenticated and subjected to post, and three-level safety technology delivery is performed according to regulations.
3. Measurement lofting
(1) And (5) connecting an axis control point and an elevation datum point with the civil engineering.
(2) Establishing a steel structure measurement control network: according to the measurement control points established by civil engineering, the measurement control points are led before engineering construction, a steel structure measurement control network is arranged, each control point is made into a semi-permanent coordinate pile and a horizontal datum point pile, and protection measures are taken to prevent damage.
(3) And paying off and measuring the datum line and the axis of the steel structure according to the datum point provided by civil engineering.
4. Spherical support mounting
(1) The production of the spherical support meets the design requirement, and the spherical support is allowed to enter the field after being qualified by self-inspection and special inspection. When in transportation, the steel is lightly loaded and lightly placed, and is properly shipped, so that deformation is prevented.
(2) The position of the embedded steel plate before the spherical support is installed is measured and rechecked, the installation position is accurate, the embedded steel plate connected with the support is polished and leveled, and rust removal reaches St2.5 level.
(3) The base plate of the support falls on the design position and the design elevation of the embedded steel plate, the position of the spherical support is finely adjusted, and the steel plate at the top of the support and the embedded steel plate are temporarily solidified in a welding mode by steel bars.
(4) And full-welding the base plate of the support and the embedded steel plate by adopting a welding rod which is adaptive to the base material, wherein the welding seam grade is a common welding seam, and a small hammer is used for knocking out welding slag after welding.
5. Curtain wall steel structure construction
(1) Processing and manufacturing of steel structure
a. When the steel structural member is manufactured, the steel structural member is manufactured according to the steel structural engineering construction and acceptance inspection standard.
b. And (3) 1:1 of construction large samples are put into the steel components before manufacturing, the machining allowance is fully considered during the lofting, welding shrinkage allowance is reserved for the welding components according to the technological requirements, and the materials can be fed after rechecking.
c. The steel is corrected before being processed, so that the steel is leveled, and the manufacturing precision is not affected.
d. And during welding, a reasonable welding sequence is selected so as to reduce welding stress and deformation generated in the steel structure, the length and the height of the welding seam are all full welding except the length and the height of the welding seam which are noted in a construction drawing, and the inspection grade of the welding seam meets the design requirement.
e. When the components leave the factory, the components should be provided with data such as product qualification certificate, design change file, material quality certificate, main component inspection record, factory pre-assembly record and the like, and the components are sent to an installation site together.
(2) Steel structure transportation
a. The steel member adopts the measures of adding a backing plate, adding a protection layer, protecting the sleeve and the like in the packaging, stacking and transporting processes, so that the coating and the member are not damaged, and the member and the part are not deformed, scattered and confused.
b. The components are transported and loaded by using a 50T crane and a 7.5T forklift in a factory, and all transport components are transported and loaded by using a 50T automobile crane and a 7.5T forklift in a construction and installation site, so that the components are forbidden to be unloaded freely.
c. The material entering and stacking areas are arranged on the north and south sides of the building, and areas covered by the tower crane and the crane are avoided from carrying for the second time, and the components are stacked.
6. Roof steel structure construction
(1) The process flow comprises the following steps: construction preparation, axis retest, steel column hoisting, main beam hoisting, secondary beam hoisting, structure welding stabilization, overhanging main beam hoisting, overhanging secondary beam hoisting, and structure welding repair welding ending.
(2) Roof steel structure composition
As shown in fig. 3, the roof member is a box column and a square tube steel beam, the floor structure is arranged below, the crane is hoisted at the outer side and the atrium position, the dead weight of the steel beam is maximally ZL1 about 1.8T, and the maximum dead weight of the steel column is 2.5 tons.
(3) Steel column beam hoisting
a. Hoisting machine selection
The height of the engineering steel column is 4.86-9.34 m, the elevation of the bottom is +17.95m, the elevation of the bottom of the central steel column is +20.600m, and the maximum dead weight of the edge steel column is about 2.5T; and a steel column 1.2T between the D-E axes of the central zone.
According to the performance of the on-site tower crane, the steel column within 60m of the tower crane is hoisted by the tower crane, and the steel column is hoisted at the atrium position by the automobile crane.
b. As shown in fig. 4, the steel columns of the atrium circumference are all outside the lifting amplitude of the tower crane, and are lifted at the atrium position by adopting a 50T automobile crane.
(4) Steel column installation
(1) Steel column hanging point setting
The steel column hanging point is arranged at the top of the steel column, and a temporary connecting plate (at least 4 connecting plates) is directly used. The cat ladder is tied up before the steel column lifts by crane, a hanging basket is welded at a position which is 1.3m away from the top of the steel column by adopting small-section angle steel, and the hanging basket is hung above a steel structure column or beam and is temporarily fixed by adopting bolts.
(2) First layer steel column installation
And retesting the embedded part before installation, and paying off on the basis. And adjusting nuts on the screw rods according to the bottom elevation of the steel column, and then installing the steel column in place.
When the steel column is hoisted, the wood board is padded at the position of the steel column foot plate so as to prevent the foot plate of the steel column from being damaged in the hoisting process of the steel column, and when the steel column is hoisted, the crane should lift the hook and rotate the arm at the same time, so that the steel column is vertically lifted off the ground.
After the steel column is hoisted in place by using a crane, the bottom plate of the steel column penetrates into the anchor bolt and is placed on the adjusted nut, the center lines of four sides of the column are aligned and matched with the center line of the foundation paying-off line, the center line is aligned at all sides, or when the deviation is controlled within the range of standard permission, the pressing plate is penetrated, and the bolt is screwed. The steel column positioning work is completed.
(3) Hoisting of upper steel column
The upper layer steel column hoisting point is arranged on the upper portion of the steel column, four temporary connection lug plates are used as hoisting points, and the hoisting points are arranged on two sides of the end head of the column and are welded and fixed with the steel structure column. Before hoisting, the slag soil and rust on the top surface of the lower section steel column and the bottom surface of the steel column are removed completely, so that the butt joint surfaces of the upper section steel column and the lower section steel column are contacted and tightly propped.
The top surface elevation and axis deviation of the lower section steel column are controlled within the standard, the steel column distortion value is controlled within the standard, the reverse deviation returning to the original position is considered during the hoisting of the upper section steel column, the correction is carried out section by section, and the accumulated error is avoided.
After the steel column is hoisted in place, the center line of the steel column is matched with the center line of the lower section of steel column, the movable double clamping plates are stably inserted into the corresponding mounting lug plates of the lower section of column, connecting bolts are penetrated, temporary connecting clamping plates are connected, and the mounting lug plates are cut off after 2/3 of steel column welding is completed.
(5) Steel beam hoisting device
(1) Lifting thought
The member with the greatest hoisting difficulty in the engineering is ZKL1 in the midspan (D-E axis), the length of the beam is 10500mm, the dead weight is 1.6T, the hoisting radius at the midspan position is large, the dead weight is the heaviest, and the 6015 tower crane is used for hoisting. The steel beam installation follows an installation sequence of 'down before up, inside before outside, major before minor, long before short'.
(2) Steel beam hoisting device
Different hoisting methods are adopted according to the weight of the steel beam: when the weight is more than or equal to 4.0T, hoisting by adopting a mode of welding lifting lugs; when the weight is less than 4.0T, a lifting hole is formed. When the steel beam is in place, the connecting plate is clamped in time, the span spacing is adjusted by matching the punching nails of the joints with a small deviation of the holes, and then the joints are screwed by using the mounting bolts. The number of the mounting bolts is not less than 30% of the total number of the node bolts according to the specification, and not less than two.
7. Atrium steel structure
(1) The process flow comprises the following steps: construction preparation, axis retest, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting hoisting, and structural welding seam repair welding ending.
(2) Atrium component composition and hoisting machinery selection
The atrium component consists of a vertical truss, a plane truss and a support. The trusses are assembled and formed on the ground and hoisted by using an automobile crane, the maximum dead weight of the trusses is 1.8T, and the trusses are hoisted by using a 50T automobile crane.
(3) Hoisting step
As shown in fig. 7;
a. the first truss is hoisted by the automobile crane, and the 25T automobile crane auxiliary hoisting support piece is reliably connected with the civil engineering structure;
b. hoisting a second truss by using the automobile crane;
c, 25T automobile crane auxiliary hoisting truss inter-truss supporting pieces to form a stable system;
d. and continuing to hoist the truss and the support until the hoisting construction is completed.
8. Steel structure of landscape wall
(1) The process flow comprises the following steps: construction preparation, axis retest, upright column hoisting, wall connecting component installation, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting hoisting, canopy truss hoisting, and structural welding seam repair welding ending.
(2) Steel structure composition of landscape wall and hoisting machinery selection
The steel structure of the landscape wall mainly comprises a vertical truss and a plane truss and supports. The trusses are assembled and formed on the ground and hoisted by using an automobile crane, the maximum dead weight of the trusses is 5.5T, and the trusses are hoisted by using a 50T automobile crane; the support is that the maximum dead weight of a single component is less than 1T, and the single component is hoisted by a 6015 tower crane.
(3) Hoisting step
As shown in fig. 9;
a. the first truss is hoisted by the automobile crane, and the auxiliary hoisting support piece of the tower crane is reliably connected with the civil engineering structure;
b. the second truss is hoisted by the automobile crane, and the auxiliary hoisting support piece of the tower crane is reliably connected with the civil engineering structure;
c. hoisting horizontal trusses among trusses to form a stable system;
d. the rest trusses and the supports are hoisted in a similar way;
e. the tower crane lifts the single component until the component lifting is completed.
9. Anticorrosive coating treatment
(1) Corrosion-resistant coating process for steel structure processing
a. And (3) performing quartz sand spraying rust removal treatment on the steel by using a shot blasting machine, wherein the surface treatment quality reaches Sa2.5 level, and removing dust on the surface of the steel after rust removal.
b. Spraying by using a high-pressure airless sprayer, and keeping the vertical distance between the nozzle and the surface of the steel material at 30 cm-50 cm and moving at a constant speed.
c. The effective coverage of the spray gun is strictly controlled, so that the paint can cover 1/3 of the paint of one gun when the paint of the next gun is sprayed.
d. And detecting the coating of the component by using a thickness gauge in time after finishing coating, and protecting the sprayed component.
(2) Steel structure on-site corrosion-resistant coating process
After the steel member is installed, the on-site corrosion-resistant coating is required to be carried out on the on-site welding and high-strength bolt connection part. The requirements of the on-site anti-corrosion paint are consistent with those of a component processing factory, and the thickness of the anti-corrosion paint coating should reach the design requirement. The field anticorrosion coating process requires:
a. the rust removal treatment is carried out by using an electric steel wire brush or a polishing machine, the surface treatment quality reaches Sa2.5 level, dust on the surface of the steel is removed after the rust removal, and a brush is used for brushing a first primer. And after the primer is dried, a second intermediate paint is painted.
b. And detecting the coating of the component by using a thickness gauge in time after finishing coating, and protecting the sprayed component.
c. Each construction area is coated layer by layer from top to bottom on the vertical surface, and the coating is performed in the clockwise direction on the plane.
10. Fireproof spraying treatment
(1) Fireproof paint construction process
a. Base layer treatment
Removing floating pulp, sediment, dust and other adherents on the surface of the steel member by using a shovel blade, a steel wire brush and the like before construction; the surface of the steel member must not be stained with water or greasy dirt.
b. Stirring the paint
And uniformly stirring the fireproof coating in proportion by using a stirrer.
c. First construction
And carrying out first-pass fireproof coating construction by using a spraying mode.
d. Subsequent construction
And after the first fireproof paint is dried, carrying out construction on the 2 nd to 3 rd fireproof paint in sequence until the thickness of the fireproof paint reaches the design requirement.
(2) Fireproof coating repair process
When some special parts of the steel structure cannot be directly sprayed, the steel structure is repaired by scraping or brushing.
a. Surface treatment
And (5) treating the paint with the unclosed periphery, removing the loose fireproof coating and cleaning.
b. Blade coating repair
The inclination of the knife coating tool is mastered during knife coating, and the force is uniform. The coatings are closely contacted, firmly bonded and smooth in surface.
c. Brush repair
Before brushing, the scrubbing brush is soaked and dried by water or a diluent, then the dipping is used for brushing, the action is rapid during brushing, each brushing piece is not too wide, the edges are not dried during mutual connection, and no joint trace is displayed.
11. Acceptance check
(1) The steel member entrance acceptance content mainly comprises acceptance and handover of member delivery data, weld quality and member appearance size, and quality control is focused on a steel structure manufacturing factory. After inspection, the components with defects exceeding the allowable deviation range are repaired on site, and the components which cannot be repaired on site are required to be returned to a factory for repair after being checked and accepted after meeting the requirements.
(2) The repeated measurement of the steel column and the measurement control of the steel beam installation are enhanced, and the steel column mainly comprises the integral verticality of a main body structure and the integral plane bending of the main body structure.
(3) And carrying out nondestructive testing on the appearance of the welding seam and the welded welding seam.
(4) Design and specification requirements for corrosion and fire protection coating.
The present invention has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the invention based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the invention, which is defined by the appended claims.
Claims (4)
1. The hoisting construction method of the large-space special-shaped curtain wall steel structure is characterized by comprising a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure;
the landscape wall steel structures are arranged in a four-corner symmetrical mode, the middle shaft of one side of the landscape wall steel structures is fixedly connected with the outer side of the inlet steel structure, the top edge of the landscape wall steel structures is fixedly connected with the outer side edge of the roof steel structures, and the inner side of the shaft center of the roof steel structures is fixedly connected with the top edge of the atrium steel structures; the roof steel structure comprises a box column and a plurality of square steel beams arranged at the bottom of the box column, and the bottom of the roof steel structure is a floor structure; the entrance steel structure comprises a plurality of vertical first elevation trusses, a plurality of first plane trusses horizontally connected between the first elevation trusses, a gate truss fixed between the first elevation trusses and a plurality of first support rods for supporting the gate truss; the atrium steel structure comprises a plurality of second vertical face trusses which are vertically arranged on the ground, a plurality of second plane trusses which are horizontally connected between the second vertical face trusses, and a second supporting rod which is supported between the second vertical face trusses and the second plane trusses; the landscape wall steel structure comprises a plurality of third vertical face trusses which are vertically arranged on the ground, a third plane truss which is horizontally connected between the third vertical face trusses, and a third supporting rod which is supported between the third vertical face trusses and the second plane truss;
the method comprises the following steps:
s1, preparing construction;
s2, measuring and lofting;
s3, curtain wall steel structure construction: fixedly connecting the roof steel structure, the atrium steel structure, the entrance steel structure and the landscape wall steel structure;
when constructing roofing steel construction, include:
the construction process of the roof steel structure comprises the following steps: construction preparation, axis retest, steel column hoisting, main beam hoisting, secondary beam hoisting, structure welding stabilization, overhanging main beam hoisting, overhanging secondary beam hoisting, structure welding seam repair welding ending;
a. and (3) setting a steel column hanging point: the steel column hanging point is arranged at the top of the steel column, at least 4 temporary connecting plates are used as hanging points, a ladder stand is bound before the steel column is lifted, a hanging basket is welded at a position 1.3m away from the top of the steel column by adopting small-section angle steel, and the hanging basket is hung above a steel structure column or beam and is temporarily fixed by adopting bolts;
b. and (3) mounting a first layer of steel column: retesting the embedded part before installation, and paying off on the basis; adjusting nuts on the screw rods according to the bottom elevation of the steel column, and then installing the steel column in place;
c. when the steel column is lifted, the crane is pivoted while hooking, so that the steel column is vertically lifted off the ground;
d. after the steel column is hoisted in place by a crane, penetrating a steel column bottom plate into a foundation anchor bolt, placing the foundation anchor bolt on an adjusted nut, aligning and fitting the central lines of four sides of the column with the central line of a foundation paying-off line, and when the central line is aligned or the deviation is controlled within a standard allowable range, penetrating a pressing plate, and screwing down a bolt;
e. hoisting an upper layer steel column: the lifting points of the upper layer steel column are arranged at the upper part of the steel column, four temporary connecting lug plates are used as lifting points, and the lifting points are arranged at two sides of the end head of the column and are welded and fixed with the steel structure column;
f. the top surface elevation and axis deviation of the lower section steel column are controlled within the specification, the steel column distortion value is controlled within the specification, the reverse deviation is returned to the original position when the upper section steel column is hoisted, and the correction is carried out section by section;
g. after the steel column is hoisted in place, the center line of the steel column is matched with the center line of the lower section of steel column, the movable double clamping plates of the steel column are stably inserted into the corresponding mounting lug plates of the lower section of steel column, connecting bolts are arranged, temporary connecting clamping plates are connected, and the mounting lug plates are cut off after 2/3 of steel column welding is completed;
s4, antiseptic spraying treatment: coating anticorrosive paint on the surfaces of the roof steel structure, the atrium steel structure, the entrance steel structure and the landscape wall steel structure;
s5, fireproof spraying treatment: coating fireproof paint on the surfaces of the roof steel structure, the atrium steel structure, the entrance steel structure and the landscape wall steel structure;
s6, checking and accepting.
2. The method for hoisting and constructing the steel structure of the large-space special-shaped curtain wall according to claim 1, wherein when constructing the atrium steel structure, the method further comprises:
s310, the atrium steel structure process flow comprises the following steps: construction preparation, axis retest, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting piece hoisting, and structural welding seam repair welding ending;
s311, hoisting:
a. the first truss is hoisted by the automobile crane, and the 25T automobile crane auxiliary hoisting support piece is reliably connected with the civil engineering structure;
b. hoisting a second truss by using the automobile crane;
c, 25T automobile crane auxiliary hoisting truss inter-truss supporting pieces to form a stable system;
d. and continuing to hoist the truss and the supporting piece until the hoisting construction is completed.
3. The method for hoisting and constructing the large-space special-shaped curtain wall steel structure according to claim 1, wherein when the entrance steel structure is constructed, the method further comprises:
s320, the inlet steel structure process flow comprises the following steps: construction preparation, axis retest, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting piece hoisting, canopy truss hoisting and structural welding seam repair welding ending;
s321, the trusses are assembled and formed on the ground and hoisted by using an automobile crane, the maximum dead weight of the trusses is 1.2T, and the trusses are hoisted by using a 50T automobile crane.
4. The method for hoisting and constructing the steel structure of the large-space special-shaped curtain wall according to claim 1, wherein when the steel structure of the landscape wall is constructed, the method further comprises:
s330, the landscape wall steel structure process flow comprises the following steps: construction preparation, axis retest, upright column hoisting, wall connecting component installation, truss ground assembly, truss hoisting, horizontal truss hoisting among trusses, supporting piece hoisting, canopy truss hoisting, and structural welding seam repair welding ending;
s331, hoisting:
a. the first truss is hoisted by the automobile crane, and the auxiliary hoisting support piece of the tower crane is reliably connected with the civil engineering structure;
b. the second truss is hoisted by the automobile crane, and the auxiliary hoisting support piece of the tower crane is reliably connected with the civil engineering structure;
c. hoisting horizontal trusses among trusses to form a stable system;
d. and the rest trusses and the supporting pieces are hoisted in a similar way;
e. the tower crane lifts the single component until the component lifting is completed.
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