CN115262764A - 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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- CN115262764A CN115262764A CN202210812100.9A CN202210812100A CN115262764A CN 115262764 A CN115262764 A CN 115262764A CN 202210812100 A CN202210812100 A CN 202210812100A CN 115262764 A CN115262764 A CN 115262764A
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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)
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- 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 structure is arranged symmetrically at four corners, 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 axis of the roof steel structure is fixedly connected with the top edge of the atrium steel structure. The problem of big space abnormal shape curtain steel construction hoist and mount difficulty is solved, the hoist and mount construction method of big space abnormal shape curtain steel construction is provided, easy operation is easy, guarantee safe and reliable, can be according to the construction process and the construction environment of difference, 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 the 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 is a building enclosure structure which is a common light wall with decorative effect for modern high-rise buildings and large buildings and consists of a structural frame and embedded plates and does not bear loads and functions of a main structure.
However, in the prior art, 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 mostly used for building materials with smaller weight/volume, the traditional hoisting scheme is not applicable to special-shaped structural bodies with large weight and cannot meet the requirement of hoisting load, the gravity center of the special-shaped structural bodies is not easy to determine, the balance position of a hoisting point is also difficult to fix, and the traditional hoisting technology cannot be used for hoisting construction of special-shaped structural bodies with large weight/volume or complex structures.
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.
The technical scheme for realizing 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 structure is arranged symmetrically at four corners, 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 axis 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 modular design, is convenient to install and disassemble, is convenient and easy to construct, can be repeatedly used, is more green and scientific, realizes simple and easy operation and ensures safety and reliability, can flexibly adjust a construction scheme according to different construction processes and construction environments, improves the efficiency of hoisting curtain wall boards, enables the curtain wall construction to be rapid and orderly, saves a plurality of labor costs, and reduces the accident rate.
The large-space special-shaped curtain wall steel structure is further improved in that 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 large-space special-shaped curtain wall steel structure is further improved in that the entrance steel structure comprises a plurality of vertical first vertical surface trusses, a first plane truss horizontally connected among the first vertical surface trusses, a gate truss fixed among the first vertical surface trusses and a plurality of first supporting rods for supporting the gate truss.
The large-space special-shaped curtain wall steel structure is further improved in that the atrium steel structure comprises a plurality of second vertical surface trusses which are vertically arranged on the ground, a second plane truss which is horizontally connected among the second vertical surface trusses, and a second supporting rod which is supported between the second vertical surface truss and the second plane truss.
The invention further improves the large-space special-shaped curtain wall steel structure, wherein the well pipe wall steel structure comprises a plurality of third vertical surface trusses which are vertically arranged on the ground, a third plane truss which is horizontally connected among the plurality of third vertical surface trusses, and a third supporting rod which is supported between the third vertical surface 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 of:
s1, preparing construction;
s2, measuring and lofting;
s3, curtain wall steel structure construction: fixedly connecting a roof steel structure, a atrium steel structure, an entrance steel structure and a landscape wall steel structure;
s5, anticorrosive spraying treatment: coating anticorrosive paint on the surfaces of a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure;
s6, fireproof spraying treatment: coating fireproof paint on the surfaces of a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure;
and S7, checking and accepting.
The hoisting construction method of the large-space special-shaped curtain wall steel structure is further improved in that when the roof steel structure is constructed, the hoisting construction method further comprises the following steps:
s300, roof steel structure construction process: construction preparation → axis retest → steel column hoisting → girder hoisting → secondary beam hoisting → structural welding stabilization → cantilever girder hoisting → cantilever secondary beam hoisting → structural welding seam repair welding ending;
s301, steel column lifting points are arranged: the steel column hoisting point is arranged at the top of the steel column, at least 4 temporary connecting plates are used as hoisting points, the crawling ladder is tied before the steel column is hoisted, a hanging basket is welded at a position 1.3m away from the top of the steel column by adopting small-section angle steel, the hanging basket is hung above a steel structure column or a beam and is temporarily fixed by adopting bolts;
s302, installing a first-layer steel column: before installation, retesting the embedded part, and paying off on the basis; adjusting a nut on the screw according to the bottom elevation of the steel column, and then installing the steel column in place;
when the steel column is hoisted, the crane can rotate the arm while hoisting the hook, 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 steel column bottom plate on an adjusted nut, aligning and matching the center lines of four sides of the column with the center line of a foundation paying-off, and threading a pressing plate to tighten a bolt when the center lines are aligned or the deviation is controlled within a standard and allowed range;
s303, hoisting an upper-layer steel column: the hoisting points of the upper-layer steel column are arranged at the upper part of the steel column, the four temporary connecting lug plates are used as the 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;
controlling the top surface elevation and the axis deviation of the lower section steel column and the steel column distortion value within the specifications, carrying out reverse offset return in-situ treatment when the upper section steel column is hoisted, and correcting the deviation 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 next section of steel column, the movable double-clamping plate of the steel column is stably inserted into the mounting lug plate corresponding to the next section of steel column, the connecting bolt is mounted and connected with the temporary connecting clamping plate, and the mounting lug plate is cut off after the steel column is welded for 2/3.
The hoisting construction method of the large-space special-shaped curtain wall steel structure is further improved in that when the Zhongting steel structure is constructed, the hoisting construction method further comprises the following steps:
s310, the technical process of the atrium steel structure comprises the following steps: construction preparation → axis retesting → truss ground assembly → truss hoisting → horizontal truss hoisting between trusses → support hoisting → structural weld repair welding ending;
s311, hoisting:
a. a truck crane hoists a first truss, and a 25T truck crane auxiliary hoisting support member is reliably connected with a civil engineering structure;
b. hoisting a second truss by a truck crane;
c, 25T supporting pieces between auxiliary hoisting trusses of the truck crane form a stable system;
d. and continuing to hoist the truss and the support piece until the hoisting construction is completed.
The hoisting construction method of the large-space special-shaped curtain wall steel structure is further improved in that when the entrance steel structure is constructed, the hoisting construction method further comprises the following steps:
s320, inlet steel structure process flow: construction preparation → axis retesting → truss ground assembly → truss hoisting → horizontal truss hoisting between trusses → support hoisting → canopy truss hoisting → structural weld seam repair welding ending;
s321, assembling and forming the trusses on the ground, and hoisting the trusses by using a truck crane, wherein the maximum self weight of the trusses is 1.2T, and the trusses are hoisted by using a 50T truck crane.
The hoisting construction method of the large-space special-shaped curtain wall steel structure is further improved in that when the landscape wall steel structure is constructed, the hoisting construction method further comprises the following steps:
s330, landscape wall steel structure process flow: construction preparation → axis retesting → column hoisting → wall connecting member installation → truss ground assembly → truss hoisting → horizontal truss hoisting between trusses → support hoisting → canopy truss hoisting → structural weld repair welding ending;
s331, hoisting:
a. a truck crane hoists a first truss, and a tower crane auxiliary hoisting support member is reliably connected with a civil structure;
b. a second truss is hoisted by a truck crane, and an auxiliary hoisting support member of the tower crane is reliably connected with a civil structure;
c. hoisting horizontal trusses among the trusses to form a stable system;
d. hoisting the rest trusses and supporting pieces by analogy;
e. and hoisting a single component by the tower crane until the component hoisting 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.
FIG. 3 is a perspective view of the roofing steel structure of the large-space special-shaped curtain wall steel structure of the invention.
FIG. 4 is a layout diagram of an atrium truck crane of the hoisting construction method of the large-space special-shaped curtain wall steel structure.
FIG. 5 is a schematic view of hoisting modes with different weights of the hoisting construction method for the large-space special-shaped curtain wall steel structure.
FIG. 6 is a schematic view of the atrium member hoisting of the hoisting construction method of the large-space special-shaped curtain wall steel structure.
FIG. 7 is a schematic diagram of the hoisting steps of the atrium member of the hoisting construction method of the large-space special-shaped curtain wall steel structure.
FIG. 8 is a schematic view of an inlet steel structure of the large-space special-shaped curtain wall steel structure.
FIG. 9 is a landscape wall steel structure hoisting flow chart of the hoisting construction method of the large-space special-shaped curtain wall steel structure.
Wherein, 1, a roof steel structure; 2. a Zhongting steel structure; 3. an inlet steel structure; 4. landscape wall steel construction.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, the invention provides a large-space special-shaped curtain wall steel structure and a hoisting construction method thereof, the large-space special-shaped curtain wall steel structure adopts a modular design, is convenient to install and disassemble, is convenient and easy to construct, 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, improves the efficiency of hoisting a curtain wall plate, enables the curtain wall construction to be rapid and orderly, saves a plurality of labor costs, and reduces the accident rate. The large-space special-shaped curtain wall steel structure is explained below with reference to the attached 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 of the invention. The large space special-shaped curtain wall steel structure of the invention is explained 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, a atrium steel structure, an entrance steel structure and a landscape wall steel structure;
the landscape wall steel structure is arranged symmetrically at four corners, 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 axis of the roof steel structure is fixedly connected with the top edge of the atrium steel structure.
As a preferred embodiment of the present invention, the roof steel structure includes a box-shaped column and a plurality of square steel beams installed at the bottom of the box-shaped column, and the bottom of the roof steel structure is a floor structure.
Furthermore, the entrance steel structure comprises a plurality of vertical first vertical surface trusses, a first plane truss horizontally connected among the first vertical surface trusses, a gate truss fixed among the first vertical surface trusses and a plurality of first supporting rods for supporting the gate truss.
Furthermore, the atrium steel structure comprises a plurality of second vertical face trusses which are vertically arranged on the ground, second plane trusses which are horizontally connected among the second vertical face trusses and second supporting rods which are supported between the second vertical face trusses and the second plane trusses.
Furthermore, the well pipe wall steel structure comprises a plurality of third vertical surface trusses which are vertically arranged on the ground, a third plane truss which is horizontally connected among the plurality of third vertical surface trusses and a third supporting rod which is supported between the third vertical surface truss 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, a atrium steel structure, an entrance steel structure and a landscape wall steel structure;
s5, anticorrosive spraying treatment: coating anticorrosive paint on the surfaces of a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure;
s6, fireproof spraying treatment: coating fireproof paint on the surfaces of a roof steel structure, an atrium steel structure, an entrance steel structure and a landscape wall steel structure;
and S7, checking and accepting.
Further, during construction roofing steel construction, still include:
s300, roof steel structure construction process: construction preparation → axis retest → steel column hoisting → girder hoisting → secondary beam hoisting → structural welding stabilization → cantilever girder hoisting → cantilever secondary beam hoisting → structural welding seam repair welding ending;
s301, steel column lifting points are arranged: the steel column lifting point is arranged at the top of the steel column, at least 4 temporary connecting plates are used as the lifting point, the crawling ladder is tied up 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, the hanging basket is hung above the steel structural column or beam and is 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 a nut on the screw according to the bottom elevation of the steel column, and then installing the steel column in place;
when the steel column is hoisted, the crane can rotate the arm while hoisting the hook, so that the steel column is vertically lifted off the ground;
after the steel column is hoisted in place by a crane, a steel column bottom plate penetrates into a foundation anchor bolt and is placed on an adjusted nut, the center lines of four sides of the column are aligned and matched with the center line of a foundation paying-off line, and a pressing plate is put on when the center lines are aligned or the deviation is controlled within a standard and allowed range, and the bolt is screwed down;
s303, hoisting an upper-layer steel column: the hoisting points of the upper-layer steel column are arranged at the upper part of the steel column, the four temporary connecting lug plates are used as the 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;
controlling the top surface elevation and the axis deviation of the lower section of steel column and the steel column distortion value within the specifications, carrying out reverse offset and in-situ returning treatment when the upper section of steel column is hoisted, and rectifying the deviation 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 next section of steel column, the movable double-clamping plate of the steel column is stably inserted into the mounting lug plate corresponding to the next section of steel column, the connecting bolt is mounted and connected with the temporary connecting clamping plate, and the mounting lug plate is cut off after the steel column is welded for 2/3.
Further, during the construction zhongting steel construction, still include:
s310, an atrium steel structure process flow is as follows: construction preparation → axis retesting → truss ground assembly → truss hoisting → horizontal truss hoisting between trusses → support hoisting → structural weld repair welding ending;
s311, hoisting:
a. a truck crane hoists a first truss, and an auxiliary hoisting support member of the 25T truck crane is reliably connected with a civil engineering structure;
b. hoisting a second truss by a truck crane;
c, forming a stable system by using the support piece between the auxiliary hoisting trusses of the 25T truck crane;
d. and continuing to hoist the truss and the support piece until the hoisting construction is completed.
Further, during construction entry steel construction, still include:
s320, inlet steel structure process flow: construction preparation → axis retest → truss ground assembly → truss hoisting → horizontal truss hoisting between trusses → support hoisting → canopy truss hoisting → structural weld repair welding ending;
s321, assembling and forming the trusses on the ground, and hoisting the trusses by using a truck crane, wherein the maximum dead weight of the trusses is 1.2T, and hoisting by using a 50T truck crane.
Further, during construction view wall steel construction, still include:
s330, landscape wall steel structure process flow: construction preparation → axis retest → upright column hoisting → wall connecting member installation → truss ground assembly → truss hoisting → horizontal truss hoisting between trusses → support hoisting → canopy truss hoisting → structural welding seam repair welding ending;
s331, hoisting:
a. a truck crane hoists a first truss, and a tower crane auxiliary hoisting support member is reliably connected with a civil structure;
b. a second truss is hoisted by a truck crane, and the auxiliary hoisting support member of the tower crane is reliably connected with a civil engineering structure;
c. hoisting horizontal trusses among the trusses to form a stable system;
d. hoisting the rest trusses and supporting pieces in the same way;
e. and hoisting a single component by the tower crane until the component is hoisted.
The operation mode of practical implementation of the hoisting construction method provided by the invention is as follows:
1. construction process flow
Step one, construction preparation: the method comprises technical preparation, material preparation and labor preparation, wherein the material preparation comprises material preparation and machine preparation.
And step two, measuring and lofting.
And step three, mounting the spherical support.
Step four, curtain wall steel structure construction: the method is characterized by comprising four construction items, namely roof steel structure 1 construction, atrium steel structure 2 construction, entrance steel structure 3 construction and landscape wall steel structure 4 construction.
And step five, performing anticorrosive spraying treatment, which comprises two processes of processing and anticorrosive coating of the steel structure and field anticorrosive coating of the steel structure.
Sixthly, fireproof spraying treatment: the method comprises a fireproof coating construction process and a fireproof coating repair process;
and seventhly, checking and accepting.
2. The key points of the operation
(1) Preparation for construction
(1) Technical preparation
a. Before construction, construction technicians carefully learn technical specifications, standards and technical rules, familiarize with drawings and know design intentions.
b. Organizing special meeting, and carrying out technical meeting on construction teams.
c. And (4) carrying out safety and technical training on constructors, and strengthening the technical quality of teams and groups.
(2) Material preparation
(1) Material preparation
And (4) planning to enter the field in batches according to the material requirements, storing the material to a specified place after the material is qualified by acceptance, and performing covering protection. And simultaneously, carrying out sampling test on various approach materials.
(2) Implement preparation
According to the plan of the construction machine for use, the renting and purchasing plan of the machine is made, the check and maintenance work of the use money of the approach is made, and the normal operation is ensured.
(3) Labor preparation
a. And organizing the approach of workers according to the construction plan and the labor demand plan.
b. The safety of entering of constructors is well realized. Education works such as quality, fire prevention, civilized construction and the like are carried out, pre-post training is carried out, the key technical work must be certified and put on post, and three-level safety technology is carried out according to regulations.
3. Survey lofting
(1) And connecting an axis control point and an elevation datum point with civil engineering.
(2) Establishing a steel structure measurement control network: according to measurement control points established by civil engineering, measurement control points are introduced before engineering construction, a steel structure measurement control network is laid, each control point is made into a semi-permanent coordinate pile and a horizontal reference point pile, and protective measures are taken to prevent damage.
(3) And paying off and measuring the steel structure datum line and the axis according to the datum point provided by civil engineering.
4. Spherical bearing mounting
(1) The production of the spherical support seat meets the design requirements, and the spherical support seat is allowed to be transported into a field after being qualified through self-inspection and special inspection. During transportation, the packaging box needs to be lightly packaged and lightly loaded, and properly shipped to prevent deformation.
(2) The position of the embedded steel plate is measured and rechecked before the spherical support is installed, the accurate installation position is ensured, then the embedded steel plate connected with the support is polished to be smooth, and the derusting reaches St2.5 grade.
(3) And the base plate of the support falls on the design position and the design elevation of the pre-buried steel plate, the position of the spherical support is finely adjusted, and the steel bar is used for temporarily solidifying the steel plate at the top of the support and the pre-buried steel plate in a welding mode.
(4) And fully welding the base plate of the support and the pre-buried steel plate by adopting a welding rod adaptive to the base metal, wherein the grade of the welding seam is a common welding seam, and knocking by using a small hammer after welding to remove welding slag.
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 Specification.
b. All steel members are 1 to enlarge the construction sample before making, fully consider the machining allowance during the sample making, the welding shrinkage allowance is reserved according to the technological requirement for the welding members, and the blanking can be carried out after rechecking is carried out without errors.
c. The steel material is corrected before being processed to be flat so as not to influence the manufacturing precision.
d. And during welding, a reasonable welding sequence is selected to reduce welding stress and deformation generated in a steel structure, the length and the height of a welding seam are all full-welded except the length and the height which are already noted in a construction drawing, and the inspection grade of the welding seam meets the design requirement.
e. When the component leaves the factory, the component should have the data of product certification, design change file, material quality certificate, main component inspection record, factory pre-assembly record, etc., and the component is sent to the installation site together with the component.
(2) Transportation of steel structure
a. The steel members adopt the measures of adding backing plates, adding protective layers, protective sleeves and the like in the processes of packaging, stacking and transporting, so that the coating and the members are not damaged, and the members and parts are not deformed, lost and confused.
b. The components are transported and loaded and unloaded in a factory by using a 50T crane and a 7.5T forklift, all the transported components are transported and loaded and unloaded by using a 50T truck and a 7.5T forklift at a construction and installation site, and the components are strictly prohibited to be freely unloaded.
c. The material entering and stacking areas are arranged at the south and north sides of the building and the areas covered by the tower crane and the crane, so that secondary carrying and component stacking are avoided.
6. Roof steel structure construction
(1) The process flow comprises the following steps: construction preparation → axis retesting → steel column hoisting → girder hoisting → secondary beam hoisting → structural welding stabilization → cantilever girder hoisting → cantilever secondary beam hoisting → structural welding seam repair welding ending.
(2) Roof steel structure composition
As shown in fig. 3, the roof members are box-type columns and square-tube steel beams, a floor structure is arranged below the roof members, the cranes are hoisted at outer sides and atrium positions, the maximum weight of the steel beams is ZL1 about 1.8T, and the maximum weight of the steel columns is 2.5 tons.
(3) Steel column beam hoisting
a. Selection of hoisting machinery
The height of the engineering steel column is 4.86-9.34 m, the bottom elevation is plus 17.95m, the bottom elevation of the central steel column is plus 20.600m, and the maximum self weight of the edge steel column is about 2.5T; center area D-E axis steel column 1.2T.
According to the performance of the tower crane on site, steel columns within the range of 60m of the tower crane are hoisted by the tower crane, and other steel columns are hoisted at the atrium position by the truck crane.
b. As shown in FIG. 4, steel columns around the atrium are lifted outside the lifting range of the tower crane, and the steel columns are lifted at the atrium position by adopting a 50T truck crane.
(4) Steel column installation
(1) Steel column lifting point arrangement
The steel column hoisting point is arranged at the top of the steel column, and temporary connecting plates (at least 4 connecting plates) are directly used. The crawling ladder is tied up before the steel column is lifted, a hanging basket is welded to the position 1.3m away from the top of the steel column through small-section angle steel, the hanging basket is hung above the steel structural column or the beam, and the steel structural column or the beam is temporarily fixed through bolts.
(2) First-floor steel column installation
Before installation, the embedded parts are retested and paid off on the basis. And adjusting a nut on the screw according to the bottom elevation of the steel column, and then installing the steel column in place.
When the steel column is hoisted, a wood board is well cushioned at the position of the column foot plate of the steel column so as to prevent the column foot plate from being damaged in the hoisting process of the steel column, and when the steel column is hoisted, a crane needs to hoist the hook and rotate the arm simultaneously so as to vertically lift the steel column off the ground.
After the steel column is hoisted in place by a crane, the steel column bottom plate is firstly penetrated into the foundation anchor bolt, the steel column bottom plate is placed on the adjusted nut, the center lines of the four sides of the column are aligned and matched with the center line of the foundation paying-off, the four sides are considered, when the center lines are aligned or the deviation is controlled within the range allowed by the standard, the pressing plate is worn, and the bolt is screwed. Namely completing the positioning work of the steel column.
(3) Hoisting of upper steel column
The upper steel column hoisting point is arranged on the upper portion of the steel column, four temporary connecting 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 fixed with the steel structure column in a welding mode. Before hoisting, the slag soil and the floating rust on the top surface of the lower steel column section and the bottom surface of the lower steel column section are cleaned, and the abutting surface of the upper steel column section and the lower steel column section is ensured to be contacted and propped tightly.
The top surface elevation and the axis deviation of the lower section of steel column and the steel column distortion value are controlled within the specification, reverse deviation regression in-situ treatment is considered when the upper section of steel column is hoisted, deviation correction is carried out section by section, and the situation that accumulated errors are overlarge 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 next section of steel column, the movable double clamping plates are stably inserted into the mounting lug plates corresponding to the lower section of column, the connecting bolts are penetrated, the temporary connecting clamping plates are connected, and the mounting lug plates are cut off after the steel column is welded for 2/3.
(5) Steel beam hoisting
(1) Hoisting idea
The component with the greatest difficulty in hoisting in the project is ZKL1 in a midspan (D-E axis), the length of the beam is 10500mm, the self weight is 1.6T, the hoisting radius at the midspan position is large, the self weight is the heaviest, and a 6015 tower crane is used for hoisting. The installation of the steel beam follows the installation sequence of 'first lower to upper, first inner to outer, first main to secondary, first long and then short'.
(2) Steel beam hoisting
Adopting different hoisting methods 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, the hoisting hole is opened. When the steel beam is in place, the connecting plate is clamped in time, the joints with little deviation in the holes are matched by punching nails to adjust the span distance, and then the joints are screwed down by mounting bolts. The number of the mounting bolts is required to be not less than 30% of the total number of the node bolts according to the specification, and not less than two.
7. Zhongting steel structure
(1) The process flow comprises the following steps: construction preparation → axis retesting → truss ground assembly → truss hoisting → horizontal truss and hoisting between trusses → support hoisting → structural welding seam repair welding ending.
(2) Atrium component composition and hoisting machinery selection
The atrium member is composed of a vertical plane truss, a plane truss and a support. The trusses are assembled and formed on the ground and hoisted by using a truck crane, the maximum dead weight of the trusses is 1.8T, and the trusses are hoisted by using a 50T truck crane.
(3) Step of hoisting
As shown in fig. 7;
a. a truck crane hoists a first truss, and a 25T truck crane auxiliary hoisting support member is reliably connected with a civil engineering structure;
b. hoisting a second truss by a truck crane;
c, forming a stable system by using the support piece between the auxiliary hoisting trusses of the 25T truck crane;
d. and continuing to hoist the truss and support until the hoisting construction is completed.
8. Landscape wall steel structure
(1) The process flow comprises the following steps: construction preparation → axis retesting → column hoisting → wall connecting member installation → truss ground assembly → truss hoisting → horizontal truss and hoisting between trusses → supporting hoisting → canopy truss hoisting → structural weld repair welding ending.
(2) Landscape wall steel structure composition and hoisting machinery selection
The landscape wall steel structure mainly comprises a vertical face truss, a plane truss and a support. The trusses are assembled and formed on the ground and hoisted by using a truck crane, the maximum dead weight of the trusses is 5.5T, and a 50T truck crane is adopted for hoisting; the support is that the maximum dead weight of a single member is less than 1T, and the single member is hoisted by using a 6015 tower crane.
(3) Step of hoisting
As shown in fig. 9;
a. a truck crane hoists a first truss, and a tower crane auxiliary hoisting support member is reliably connected with a civil structure;
b. a second truss is hoisted by a truck crane, and the auxiliary hoisting support member of the tower crane is reliably connected with a civil engineering structure;
c. hoisting horizontal trusses among the trusses to form a stable system;
d. hoisting the rest trusses and supports by analogy;
e. and hoisting a single component by the tower crane until the component hoisting is completed.
9. Anticorrosive coating treatment
(1) Steel structure processing anticorrosion coating process
a. And (3) carrying out quartz sand blasting treatment on the steel by using a shot blasting machine, wherein the surface treatment quality reaches Sa2.5 grade, and removing dust on the surface of the steel completely after rust removal.
b. Spraying by using a high-pressure airless sprayer, keeping the vertical distance of 30-50 cm between the nozzle and the surface of the steel, and moving at a constant speed.
c. The effective coverage of the spray gun is strictly controlled, and the paint can cover 1/3 of the paint of the previous gun when the paint of the next gun is sprayed.
d. And after finishing coating, detecting the component coating by using a thickness gauge in time, and protecting the sprayed component.
(2) Steel structure on-site anticorrosion coating process
After the steel member is installed, on-site welding and high-strength bolt connecting parts need to be subjected to on-site anticorrosive coating. The requirement of the on-site anticorrosive paint is consistent with the anticorrosive requirement of a component processing and manufacturing factory, and the thickness of the anticorrosive paint coating layer is required to meet the design requirement. The requirements of the on-site anticorrosion coating process are as follows:
a. derusting by using an electric wire brush or a polishing machine, wherein the surface treatment quality is Sa2.5 grade, removing dust on the surface of the steel after derusting, and brushing a first primer by using a brush. And after the primer is dried, brushing a second intermediate paint.
b. And after finishing coating, detecting the component coating by using a thickness gauge in time, and protecting the sprayed component.
c. And coating each construction area layer by layer from top to bottom on the vertical surface, and coating in the plane in a clockwise direction.
10. Fire-proof spray coating treatment
(1) Fireproof paint construction process
a. Base layer treatment
Removing floating pulp, silt, dust and other adhesive substances on the surface of the steel member by using a scraper knife, a steel wire brush and the like before construction; the surface of the steel member is free from water stain and oil stain.
b. Paint stirring
And (3) uniformly stirring the fireproof coating in proportion by using a stirrer.
c. First construction
And (3) carrying out first fireproof coating construction by using a spraying mode.
d. Subsequent construction
And (3) after the first fireproof coating is dried, sequentially performing 2 nd to 3 rd fireproof coating construction until the thickness reaches the design requirement.
(2) Fireproof coating repair process
When some special parts of the steel structure can not be directly sprayed, blade coating or brush coating is adopted for repairing.
a. Surface treatment
And (4) treating the peripheral non-closed coating, shoveling the loose fireproof coating and cleaning.
b. Knife coating repair
When in blade coating, the gradient of a blade coating tool needs to be controlled, 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 by water or diluent and dried, then dipped and brushed, the action is quick when brushing, each brushing piece is not too wide, the edges are not dried when mutually connected, and joint marks are not shown.
11. Acceptance check
(1) The steel member incoming acceptance contents mainly comprise component delivery data, welding seam quality, acceptance and handover of component appearance dimensions, and quality control is mainly performed in steel structure manufacturing plants. And (4) after inspection, repairing the component with the defect exceeding the allowable deviation range on site, checking and accepting after the requirement is met, and sending the component which cannot be repaired on site back to a factory for repair.
(2) The method is used for enhancing retesting of the steel column and measurement and control of steel beam installation, and mainly comprises the whole perpendicularity of a main body structure and the whole plane bending of the main body structure.
(3) And carrying out nondestructive testing on the appearance of the welding seam and the welding seam after welding.
(4) The requirements for anticorrosion and fireproof coating are designed and standardized.
While the present invention has been described in detail and with reference to the embodiments thereof as shown in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. A 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 structure is arranged symmetrically at four corners, a middle shaft of the landscape wall steel structure is fixedly connected with the outer side of the entrance 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 axis of the roof steel structure is fixedly connected with the top edge of the atrium steel structure.
2. The large space special-shaped curtain wall steel structure as claimed in claim 1, wherein the roof steel structure comprises a box column and a plurality of square steel beams installed at the bottom of the box column, and the bottom of the roof steel structure is a floor structure.
3. The large space special-shaped curtain wall steel structure as claimed in claim 1, wherein the entrance steel structure comprises a plurality of first vertical plane girders in a vertical shape, a first plane girder horizontally connected between the first vertical plane girders, a gate girder fixed between the first vertical plane girders, and a plurality of first support rods for supporting the gate girder.
4. The large space special-shaped curtain wall steel structure as claimed in claim 1, wherein the atrium steel structure comprises a plurality of second vertical face trusses erected on the ground, a second plane truss horizontally connected between the plurality of second vertical face trusses, and a second support rod supported between the second vertical face trusses and the second plane truss.
5. The large space profiled curtain wall steel structure as claimed in claim 1, wherein said well tubular wall steel structure comprises a plurality of third vertical trusses erected on the ground, a third horizontal truss horizontally connected between the plurality of third vertical trusses, and a third support bar supported between the third vertical trusses and the second horizontal truss.
6. The hoisting construction method of the large-space special-shaped curtain wall steel structure as claimed in claim 1, characterized by comprising 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;
s5, anticorrosive 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;
and S7, checking and accepting.
7. The hoisting construction method of the large-space special-shaped curtain wall steel structure as claimed in claim 6, wherein when the roof steel structure is constructed, the method further comprises the following steps:
s300, the construction process of the roof steel structure comprises the following steps: construction preparation → axis retest → steel column hoisting → girder hoisting → secondary beam hoisting → structural welding stabilization → cantilever girder hoisting → cantilever secondary beam hoisting → structural welding seam repair welding ending;
s301, steel column lifting points are arranged: the steel column lifting point is arranged at the top of the steel column, at least 4 temporary connecting plates are used as lifting points, the crawling ladder is tied up 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, the hanging basket is hung above the steel structural column or beam and is 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 a nut on the screw according to the bottom elevation of the steel column, and then installing the steel column in place;
when the steel column is hoisted, the crane can rotate the arm while hoisting the hook, so that the steel column is vertically lifted off the ground;
after the steel column is hoisted in place by a crane, a steel column bottom plate penetrates into a foundation anchor bolt and is placed on an adjusted nut, the center lines of four sides of the column are aligned and matched with the center line of a foundation paying-off line, and a pressing plate is put on when the center lines are aligned or the deviation is controlled within a standard and allowed range, and the bolt is screwed down;
s303, 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, the four temporary connecting ear plates are used as the lifting points, and the lifting points are arranged on two sides of the end head of the column and are welded and fixed with the steel structure column;
controlling the top surface elevation and the axis deviation of the lower section of steel column and the steel column distortion value within the specifications, carrying out reverse offset and in-situ returning treatment when the upper section of steel column is hoisted, and rectifying the deviation 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 next section of steel column, the movable double clamping plates of the steel column are stably inserted into the corresponding mounting lug plates of the next section of steel column, the connecting bolts are mounted and connected with the temporary connecting clamping plates, and the mounting lug plates are cut off after the welding of the steel column is finished by 2/3.
8. The hoisting construction method of the large-space special-shaped curtain wall steel structure as claimed in claim 6, wherein when the atrium steel structure is constructed, the method further comprises the following steps:
s310, the technical process of the atrium steel structure comprises the following steps: construction preparation → axis retesting → truss ground assembly → truss hoisting → horizontal truss hoisting between trusses → support hoisting → structural weld repair welding ending;
s311, hoisting:
a. a truck crane hoists a first truss, and a 25T truck crane auxiliary hoisting support member is reliably connected with a civil engineering structure;
b. hoisting a second truss by a truck crane;
c, forming a stable system by using the support piece between the auxiliary hoisting trusses of the 25T truck crane;
d. and continuing to hoist the truss and the support piece until hoisting construction is completed.
9. The hoisting construction method of the large-space special-shaped curtain wall steel structure as claimed in claim 6, wherein when the entrance steel structure is constructed, the method further comprises the following steps:
s320, the process flow of the inlet steel structure is as follows: construction preparation → axis retesting → truss ground assembly → truss hoisting → horizontal truss hoisting between trusses → support hoisting → canopy truss hoisting → structural weld seam repair welding ending;
s321, assembling and forming the trusses on the ground, and hoisting the trusses by using a truck crane, wherein the maximum self weight of the trusses is 1.2T, and the trusses are hoisted by using a 50T truck crane.
10. The hoisting construction method of the large-space special-shaped curtain wall steel structure as claimed in claim 6, wherein when the landscape wall steel structure is constructed, the method further comprises the following steps:
s330, the landscape wall steel structure process flow is as follows: construction preparation → axis retest → upright column hoisting → wall connecting member installation → truss ground assembly → truss hoisting → horizontal truss hoisting between trusses → support hoisting → canopy truss hoisting → structural welding seam repair welding ending;
s331, hoisting:
a. a first truss is hoisted by a truck crane, and an auxiliary hoisting support member of the tower crane is reliably connected with a civil engineering structure;
b. a second truss is hoisted by a truck crane, and an auxiliary hoisting support member of the tower crane is reliably connected with a civil structure;
c. hoisting horizontal trusses among the trusses to form a stable system;
d. hoisting the rest trusses and supporting pieces by analogy;
e. and hoisting a single component by the tower crane until the component hoisting is completed.
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