CN111255056A - High-rise building steel structure installation method - Google Patents
High-rise building steel structure installation method Download PDFInfo
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- CN111255056A CN111255056A CN202010103660.8A CN202010103660A CN111255056A CN 111255056 A CN111255056 A CN 111255056A CN 202010103660 A CN202010103660 A CN 202010103660A CN 111255056 A CN111255056 A CN 111255056A
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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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
Abstract
The invention discloses a construction method for installing a high-rise building steel structure, which comprises the following steps: manufacturing a steel structure, transporting the steel structure, hoisting the steel structure, measuring the steel structure, welding the steel structure, coating the steel structure, and checking and accepting the middle of the steel structure. The purposes of simple steel structure technology, small construction difficulty and high construction precision of the high-rise building are achieved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for installing a high-rise building steel structure.
Background
At present, domestic super high-rise buildings are in the vogue, steel structures are widely applied to the super high-rise buildings by people with the advantages of high strength, high rigidity, short construction period and strong shock resistance, and various steel structure construction technologies also have a vigorous development trend.
The high-rise building steel structure system is a diversified and complex system project, is carefully laid out and planned during design and construction, and a careful and detailed construction organization scheme and a construction plan are formulated before construction. When a scheme is formulated, the site construction conditions and technical construction coordination and influence among various specialties are considered, so that the existing high-rise building steel structure is complex in technology, high in construction difficulty and low in construction precision.
Disclosure of Invention
The invention aims to provide a high-rise building steel structure installation method, and aims to solve the technical problems of complex high-rise building steel structure technology, high construction difficulty and low construction precision in the prior art.
In order to achieve the purpose, the invention adopts a high-rise building steel structure installation method, which comprises the following steps:
manufacturing a steel structure, wherein the steel structure is used for manufacturing a steel member;
transporting the steel structure, namely transporting the steel members to a site according to the installation sequence;
hoisting a steel structure, namely hoisting numbered steel members in sequence;
measuring a steel structure, namely measuring and controlling the steel structure by using a measuring instrument;
welding a steel structure, and determining the welding sequence, the welding process and the welding parameters of the steel member;
coating the steel structure, namely coating the steel component on site;
and (4) checking and accepting the middle of the steel structure, checking and accepting the installation and welding of all steel members, and recording.
Wherein, adopt the negative tolerance to the length preparation of welded connection's steel column, adopt the positive tolerance to the length preparation of welded connection's girder steel.
Wherein, adopt gantry crane and rail mounted steel trestle to carry out the transportation of steel member, put according to the class after transporting the steel member to the appointed place, need when putting the dampproofing pad of bottom bedding of component, putting of secondary member is no longer than one meter, and main components such as steel column, girder steel surely do not pile up it, adopt the individual layer to stack.
The steel structure hoisting comprises hoisting partitions of the steel structure and determination of a hoisting sequence, wherein the hoisting partitions are formed by dividing eight areas clockwise and hoisting the steel structure by the components in sequence, the hoisting sequence comprises hoisting steel columns, hoisting main beams and hoisting secondary beams, and accurate correction is performed after all hoisting is completed.
The method comprises the steps of measuring and controlling the hoisting of the steel member by a pre-control method, namely, paving a bottom plate on the ground of a mounting layer before hoisting, projecting civil engineering original control points a, original control points b, original control points c and original control points d which are measured by a theodolite through an internal control method onto the bottom plate respectively, drawing control axes according to the four projected original control points, drawing a cross axis corresponding to the mounting position of each steel column according to the control axes, and projecting and drawing the cross axis onto the mounting layer and the column heads at two ends of the steel column.
The method comprises the following steps of utilizing tracking correction to correct and rectify a hoisted steel column, namely adjusting the deviation and distortion of the steel column according to the marked axis position, wherein when the steel column deviates from a different side and is accompanied with distortion phenomenon, the adjusting formula is as follows: the displacement deviation value is a-b/2, the distortion value is a + b/2, and when the steel column has the same-side deviation and is accompanied with the distortion phenomenon, the adjustment calculation formula is as follows: and the displacement deviation value is a + b/2, the distortion value is a-b/2, wherein a and b are deviation values of the building axis and the steel column axis of the wing plate position, the distortion of the steel column is corrected through staggered installation according to the calculated distortion deviation value, and the steel column is inclined in the opposite direction to correct the position deviation of the steel column when the verticality of the steel column is adjusted according to the calculated displacement deviation value of the steel column.
The method comprises the steps of carrying out integral measurement control on a steel structure, namely, carrying out construction sequence of adopting a hydraulic creeping formwork, a vertical structure and a horizontal structure according to civil engineering construction in advance, and completing spatial positioning of inward-inclining and outward-placing of the steel structure by adopting a measurement method combining a laser vertical instrument and a total station 'polar coordinate external control method'.
The welding seam of the beam head joint extending out of the steel column and the steel beam or the steel column and the steel beam is firstly bolted and then welded, the high-strength bolt is firstly finally screwed, then electric welding is carried out, the wing plate is firstly electrically welded, and then the wing plate is electrically welded.
The profiled steel plates are welded, the position lines of the profiled steel plates are measured and placed on the steel beam before the profiled steel plates are placed, the plates are uniformly laid, the number of spot welding points of the profiled steel plates and the size and the length of the spot welding are equal, the current of stud welding is required to be met, rivets can be used between the plates, and the condition that concrete does not leak slurry is met.
Wherein, fire retardant coating and the anticorrosive paint phase-match of steel construction, and fire retardant coating's construction reaches required thickness according to the fire prevention grade.
The invention relates to a construction method for installing a high-rise building steel structure, which comprises the following steps: manufacturing a steel structure, transporting the steel structure, hoisting the steel structure, measuring the steel structure, welding the steel structure, coating the steel structure, and checking and accepting the middle of the steel structure. The steel structure of the high-rise building has the advantages of simple technology, small construction difficulty and high construction precision.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flow chart of a construction method for installing a steel structure of a high-rise building according to the present invention.
FIG. 2 is a flow chart of the manufacture of the steel structure of the present invention.
FIG. 3 is a flow chart of the steel structure transportation of the present invention.
Fig. 4 is a flow chart of the hoisting of the steel structure of the present invention.
Fig. 5 is a flow chart of the steel structure measurement of the present invention.
FIG. 6 is a flow chart of the present invention for welding of steel structures.
Fig. 7 is a flow chart of the steel structure coating of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 7, the present invention provides a construction method for installing a steel structure of a high-rise building, including the steps of:
s100: manufacturing a steel structure, wherein the steel structure is used for manufacturing a steel member; the method comprises the following specific steps:
s101: compiling a steel structure manufacturing operation instruction book, and strictly observing in the manufacturing process of the steel member;
s102: the material of the steel is rechecked according to batches, and the material of the steel accords with the design requirement;
s103: the length of the steel column connected in a welding mode is manufactured by adopting negative tolerance, and the length of the steel beam connected in a welding mode is manufactured by adopting positive tolerance;
s104: and (5) manufacturing and checking the steel member.
Firstly, when a high-rise building steel structure is installed, a steel structure manufacturing operation instruction book is required to be compiled, wherein the steel structure manufacturing operation instruction book comprises an application range, production technology preparation, a steel structure production process flow, blanking, steel assembly, steel correction, general assembly, welding, coating, numbering and other flows, a worker strictly follows the steel structure manufacturing operation instruction book in the manufacturing process of the steel part, the material used by the steel part is rechecked in batches to ensure that the material used by the steel part meets the design requirement, a negative tolerance, namely a negative 5 plus 1, is adopted for the manufacturing length of a steel column, a positive tolerance, namely a negative 1 plus 5, is adopted for the manufacturing length of a steel beam, the manufactured steel part is required to be checked, the appearance size of the steel part, the position, the angle, the bolt hole and the position of a connecting plate part are checked, and the welding quality of the steel part is checked, the machining quality of the friction surface, the quality of the surface coating and the like, and the component production qualification certificate.
S200: transporting the steel structure, namely transporting the steel members to a site according to the installation sequence;
s201: compiling a steel structure installation sequence chart and a welding sequence chart;
s202: arranging a stacking yard on the ground;
s203: adopt gantry crane and rail mounted steel trestle to carry out the transportation of steel member, put according to the class after transporting the steel member to the appointed place, need when putting the dampproofing pad of bottom bedding of component, putting of secondary member is no longer than one meter, and main members such as steel column, girder steel surely do not pile up it, adopt the individual layer to stack.
Firstly, drawing up a steel structure installation sequence chart and a welding sequence chart so as to be conveniently used in the working process of all working procedures in the whole construction process of a high-rise building steel structure project, uniformly using the chart in the process of manufacturing steel members, inspecting the manufacturing quality, carrying out matched transportation on the steel members, numbering the steel member installation sequence, stacking the steel members on site, carrying out classified packaging and bundling on the steel members according to the sequence of the labels on the steel members, carrying out transportation on the steel members, placing the steel members according to the classes after transporting the steel members to a specified place, laying sleepers or moisture-proof pads at the bottom of the steel members when placing the steel members so as to prevent the steel members from being affected with damp, wherein the placing of the secondary members is not more than one meter so as to avoid using the secondary members when the secondary members are needed, need turn over in the department of stacking and look for, inconvenient workman's operation, main component such as steel column, girder steel surely do not need to pile up it, need the individual layer to stack, is on the one hand in order to make things convenient for workman's hoist and mount when hoist and mount component, and on the other hand can prevent that main component from piling up too high and scattering, prevents the emergence of incident.
S300: hoisting a steel structure, namely hoisting numbered steel members in sequence;
s301: installing a crane;
s302: carrying out hoisting partition on the steel structure and determining a hoisting sequence;
s303: placing a steel structure to be hoisted below a lifting hook of a crane, and comprehensively inspecting the steel structure;
s304: budgeting the weight of the steel member, and moving the steel member upwards to the required space range;
s305: adjusting the safety distance of the lifting hook to reach the crane bracket in the horizontal direction, and then lifting the bound steel member by using the lifting hook;
s306: and moving the lifted steel member to a place needing to be installed, and fixing the steel member by using bolts.
Hoisting is a leading process of steel structure construction, the hoisting speed and quality have a great influence on the whole project, a crane needs to be installed before a steel member needs to be hoisted, a foundation is paved at a place where the crane needs to be installed, the foundation is dug downwards to a depth of 90-110 cmp, the floor area is 3 square meters to 3.5 square meters, a tied reinforcing steel bar frame is placed in the dug pit, then concrete is injected, a vibration pump is adopted to fill the concrete, a machine is adopted to trowel the upper surface of the concrete, after the concrete is completely solidified, holes are formed on the poured foundation to fix bolts, a bracket of a hanger is fixed on a stud of the foundation through fixing screws, the periphery of one section of the bracket close to the foundation is reinforced by reinforcing steel bars, a crane bracket is additionally arranged in the direction of the reinforced base bracket, a crane is adopted to load when the bracket is additionally arranged, an installer fixes the two sections of the brackets by bolts after alignment, the installation of the crane is completed, after the crane is installed, the side surface of the installed crane support is fixed on the wall by adopting a fixed steel bar every 2m, before the crane is used for hoisting, a hoisting partition and a hoisting sequence are determined according to the shape of a structural plane and a vertical surface, the structural form, the site construction condition and other factors, the middle hoisting partition is divided into eight regions clockwise and hoisted by a clockwise component, the hoisting sequence comprises a hoisting column, a hoisting main beam and a hoisting secondary beam, a steel member to be hoisted is placed below a lifting hook of the crane, the steel member is comprehensively inspected, whether the surface of the steel member has problems or not is inspected, then the weight of the steel member to be hoisted is budgeted, the size of a space range required by the steel member to move upwards is calculated, then the steel member is bound, the safety distance of the lifting hook reaching the crane support in the horizontal direction is adjusted, and then the lifting hook of the crane is put down, and hoisting the steel structure which is bound in advance, aligning the steel structure to the place needing to be installed, and fixing the steel structure by adopting a fixing bolt. The hoisting method is high in reliability, high in production efficiency and fast in construction progress.
S400: measuring a steel structure, namely measuring and controlling the steel structure by using a measuring instrument;
s401: measuring and controlling the hoisting of the steel member by using a pre-control method;
s402: correcting and rectifying the hoisted steel column by utilizing tracking correction;
s403: and (5) overall measurement control of the steel structure.
In the construction of the super high-rise steel structure, the deviation of the perpendicularity, the axis and the elevation is an important index for measuring the engineering quality, and the measurement is used as a control stage of the engineering quality to provide a basis for construction inspection. As can be seen from the construction process of the steel structure, all the processes are mutually connected and restricted, and the measurement control method directly influences the measurement precision and progress of the project. In the engineering measurement construction, the combination of 'pre-control' and 'tracking correction' is adopted, namely a bottom plate is laid on the ground of an installation layer before hoisting, a civil original control point a, an original control point b, an original control point c and an original control point d which are measured by a theodolite through an internal control method are respectively projected on the bottom plate, and a control axis is drawn according to the four projected original control points, wherein certain requirements are required for the installation and the erection of the theodolite, the installation and the construction of a steel column of a steel structure frame and a corresponding steel beam of the frame are firstly needed to be carried out, a simple temporary operation platform with the radius of 1m is selected from the steel column in the range of 180 DEG at the steel beam position of the uppermost platform of the installed frame structure, a horizontal support frame is installed at the connecting lug plate at the upper end of the steel column of the frame, the theodolite is erected on the horizontal support frame, then the theodolite, projecting and drawing the cross axis on the column heads at the two ends of the mounting layer and the steel column, marking the position of the column head of the steel column by using a pen, adjusting the offset and the distortion of the steel column according to the marked axis position, adjusting the verticality of the steel column by using a theodolite after the steel column is mounted, ensuring the mounting accuracy of the steel column, and when the steel column deviates from the opposite side and is accompanied with the distortion phenomenon, adjusting the formula to be: the displacement deviation value is a-b/2, the distortion value is a + b/2, and when the steel column has the same-side deviation and is accompanied with the distortion phenomenon, the adjustment calculation formula is as follows: the displacement deviant is a + b/2, the distortion value is a-b/2, wherein a and b are the deviation values of the building axis of the wing plate position and the axis of the steel column, the distortion of the steel column is corrected through staggered installation according to the calculated distortion deviation, the deviation range allowed by the specification is not exceeded during staggered installation, if the distortion value is larger, the adjustment can be divided into two times or multiple times, the steel column is inclined in the opposite direction to correct the deviation of the steel column when the verticality of the steel column is adjusted according to the calculated displacement deviation of the steel column, the deviation does not exceed the allowable range of the specification, the deviation correction method effectively corrects the error generated during manufacturing and installation, can avoid the accumulation of the error, is combined with the overall quality control of the steel structure, adopts a hydraulic climbing formwork according to civil construction, the construction sequence of the first vertical structure and the subsequent horizontal structure, and adopts a measuring method combining a laser vertical instrument and a total station' polar coordinate external control, the space positioning of the inward-inclining and outward-placing of the steel structure is completed, the aim of virtuous circle among all working procedures of regional construction is achieved, the installation precision of the steel column of the high-rise building steel structure is improved, the verticality and the offset of the steel column are simply and effectively controlled within the standard requirements, and the construction quality of the high-rise building steel structure is guaranteed.
S500: welding a steel structure, and determining the welding sequence, the welding process and the welding parameters of the steel member;
s501: determining the welding sequence of steel members, welding seams of beam head joints extending out of the steel columns and the steel beams or the steel columns and the steel beams, firstly using a bolt-welding-after-welding process, firstly finally screwing high-strength bolts, then electrically welding, firstly electrically welding a lower wing plate, and then electrically welding an upper wing plate;
s502: welding the profiled steel plates, measuring and placing position lines of the profiled steel plates on the steel beam before the profiled steel plates are placed, uniformly laying the plates, and using rivets between the plates to meet the current of stud welding and meet the requirement of no slurry leakage of concrete, wherein the number of spot welding points and the size of spot welding are equal to that of the profiled steel plates;
s503: before welding, performing a welding process test;
s504: and determining welding parameters, and compiling a set of feasible carbon dioxide gas shielded semi-automatic welding method and parameters suitable for the characteristics of high-rise buildings after the process is selected.
The method comprises the following steps that a welder carries out welding training and examination before welding, theoretical examination and actual skill examination exist, the welder needs to number and has a steel mark, before the welding work starts, the welding sequence of steel members and the welding seam of a steel column and a steel beam or a beam head joint extending out of the steel column and the steel beam are determined, the bolt is used firstly and then the welding process is carried out, the high-strength bolt is finally screwed firstly and then electrically welded, the lower wing plate is electrically welded firstly and then the upper wing plate is electrically welded; then the profiled steel sheet is welded, firstly, a profiled steel sheet plane layout picture, namely a plate arrangement picture, is compiled, the member number is compiled by plates, end sockets and eaves plates, the ground is processed to form a corner cut gap which is the same as that of a steel member, the steel member is not processed at high altitude, the position line of the profiled steel sheet is measured and placed on the steel beam before the profiled steel sheet is laid, the plates are uniformly laid and arranged, the number of spot welding points of the profiled steel sheet is equal to the size of spot welding, the current of stud welding is required to be met, rivets can be used between the plates, and the condition that concrete has no slurry leakage is met; and then carrying out welding process tests, wherein the welding process tests comprise large-diameter welding rod trial welding, low-temperature welding process tests and welding tests of dissimilar steel connection. 1:1 operation test is carried out on the same conditions of on-site column joint welding, all the tests are qualified, the no-load voltage of the electric welding machines is more than or equal to 80V, the capacity of the welding rods with the diameter of 5-8 mm can be welded, when the welding is carried out, the upper limit value of rated current of the welding rods, namely a slightly larger current, is used, the cross sections of a welding electrode wire and a ground wire are not less than 50 square millimeters, the length is preferably 100 meters, the ground wire of each electric welding machine is directly and firmly connected with a steel structure, steel with the base metal thickness of more than 40 mm is preheated to 100-150 ℃ before welding and then welded, when the welding is carried out, different welding processes of a bottoming welding seam, a middle welding seam and a cover surface welding seam are respectively used for welding, the heat after the welding is kept between 100 ℃ and 150 ℃ for 1h, when the environmental temperature is lower than 0 ℃ in winter or lower than 10, unqualified and reprocessed to be qualified. After the welding parameters are determined and the process is selected, a set of feasible carbon dioxide gas shielded semi-automatic welding method and parameters suitable for the characteristics of high-rise buildings are compiled, so that the welding environment is in a relatively stable state, and the construction protection measures and auxiliary measures are enhanced.
S600: coating the steel structure, namely coating the steel component on site;
s601: the fireproof coating is matched with the anticorrosive coating of the steel structure, and the construction of the fireproof coating reaches the required thickness according to the fireproof grade.
The site coating parts comprise: the high-strength bolt joint, the welding joint, the transportation and hoisting collision damage part and the lower beam surface part of the profiled steel sheet are cleaned, the coating construction of the coated component surface is equal to the thickness of the times of the coating of the component, the fireproof coating is matched with the anticorrosive coating of the steel structure, and the fireproof coating is constructed to reach the required thickness according to the fireproof grade.
S700: and (4) checking and accepting the middle of the steel structure, checking and accepting the installation and welding of all steel members, and recording.
After finishing coating, the construction site inspectors check and accept the installation and welding of all steel members and record the installation and welding.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A high-rise building steel structure installation method is characterized by comprising the following steps:
manufacturing a steel structure, wherein the steel structure is used for manufacturing a steel member;
transporting the steel structure, namely transporting the steel members to a site according to the installation sequence;
hoisting a steel structure, namely hoisting numbered steel members in sequence;
measuring a steel structure, namely measuring and controlling the steel structure by using a measuring instrument;
welding a steel structure, and determining the welding sequence, the welding process and the welding parameters of the steel member;
coating the steel structure, namely coating the steel component on site;
and (4) checking and accepting the middle of the steel structure, checking and accepting the installation and welding of all steel members, and recording.
2. The construction method for installing a steel structure in a high-rise building according to claim 1,
the length of the steel columns connected in a welded mode is manufactured by adopting negative tolerance, and the length of the steel beams connected in a welded mode is manufactured by adopting positive tolerance.
3. The construction method for installing a steel structure in a high-rise building according to claim 1,
adopt gantry crane and rail mounted steel trestle to carry out the transportation of steel member, put according to the class after transporting the steel member to the appointed place, need when putting the dampproofing pad of bottom bedding of component, putting of secondary member is no longer than one meter, and steel column, girder steel main component surely do not pile up it, adopt the individual layer to stack.
4. The construction method for installing a steel structure in a high-rise building according to claim 1,
the steel structure hoisting comprises the steps of carrying out hoisting partition on a steel structure and determining a hoisting sequence, wherein the hoisting partition is formed by clockwise dividing eight partitions and hoisting the components in sequence, the hoisting sequence comprises a steel hoisting column, a main hoisting beam and a secondary hoisting beam, and after all hoisting is finished, accurate correction is carried out.
5. The construction method for installing a steel structure in a high-rise building according to claim 1,
the method comprises the steps of utilizing a pre-control method to carry out measurement control on steel member hoisting, namely paving a bottom plate on the ground of a mounting layer before hoisting, projecting civil engineering original control points a, original control points b, original control points c and original control points d which are measured by a theodolite through an internal control method onto the bottom plate respectively, drawing control axes according to the four projected original control points, drawing a cross axis corresponding to the mounting position of each steel column according to the control axes, and projecting and drawing the cross axis onto the mounting layer and the column heads at two ends of the steel column.
6. The construction method for installing a steel structure in a high-rise building according to claim 5,
the steel column after hoisting is corrected and rectified by tracking correction, namely, the deviation and the distortion of the steel column are adjusted according to the marked axis position, and when the steel column deviates from the opposite side and is accompanied with the distortion phenomenon, the adjustment formula is as follows: the displacement deviation value is a-b/2, the distortion value is a + b/2, and when the steel column has the same-side deviation and is accompanied with the distortion phenomenon, the adjustment calculation formula is as follows: and the displacement deviation value is a + b/2, the distortion value is a-b/2, wherein a and b are deviation values of the building axis and the steel column axis of the wing plate position, the distortion of the steel column is corrected through staggered installation according to the calculated distortion deviation value, and the steel column is inclined in the opposite direction to correct the position deviation of the steel column when the verticality of the steel column is adjusted according to the calculated displacement deviation value of the steel column.
7. The construction method for installing a steel structure in a high-rise building according to claim 6,
and (3) carrying out overall measurement control on the steel structure, namely, according to the construction sequence that hydraulic creeping formwork is adopted in civil engineering, a vertical structure is firstly followed by a horizontal structure, and a measurement method combining a laser vertical instrument and a total station 'polar coordinate external control method' is adopted to complete the spatial positioning of inward-inclining and outward-placing of the steel structure.
8. The construction method for installing a steel structure in a high-rise building according to claim 1,
the welding seam of the beam head joint extending out of the steel column and the steel beam or the steel column and the steel beam is firstly bolted and then welded, the high-strength bolt is firstly finally screwed, then the electric welding is carried out, the wing plate is firstly electrically welded, and then the wing plate is electrically welded.
9. The construction method for installing a steel structure in a high-rise building according to claim 8,
the profiled steel plates are welded, the position lines of the profiled steel plates are measured and placed on the steel beam before the profiled steel plates are placed, the plates are uniformly laid, the number of spot welding points of the profiled steel plates and the size and the length of the spot welding are equal, current of stud welding is required to be met, rivets can be used between the plates, and concrete leakage is avoided.
10. The construction method for installing a steel structure in a high-rise building according to claim 1,
the fireproof coating is matched with the anticorrosive coating of the steel structure, and the construction of the fireproof coating reaches the required thickness according to the fireproof grade.
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| CN111927187A (en) * | 2020-07-01 | 2020-11-13 | 江苏润凯电力设备有限公司 | Rapid assembly process for structural support of power transmission tower |
| CN112404924A (en) * | 2020-10-22 | 2021-02-26 | 西安空间无线电技术研究所 | Multi-part stacking assembly method |
| CN112681594A (en) * | 2020-12-24 | 2021-04-20 | 上海建工五建集团有限公司 | Construction method of special-shaped slideway |
| CN113118071A (en) * | 2021-03-09 | 2021-07-16 | 韩艳超 | Processing apparatus before to carborundum micro-reaction board low temperature welding |
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| CN111927187A (en) * | 2020-07-01 | 2020-11-13 | 江苏润凯电力设备有限公司 | Rapid assembly process for structural support of power transmission tower |
| CN112404924A (en) * | 2020-10-22 | 2021-02-26 | 西安空间无线电技术研究所 | Multi-part stacking assembly method |
| CN112404924B (en) * | 2020-10-22 | 2021-12-07 | 西安空间无线电技术研究所 | Multi-part stacking assembly method |
| CN112681594A (en) * | 2020-12-24 | 2021-04-20 | 上海建工五建集团有限公司 | Construction method of special-shaped slideway |
| CN113118071A (en) * | 2021-03-09 | 2021-07-16 | 韩艳超 | Processing apparatus before to carborundum micro-reaction board low temperature welding |
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Application publication date: 20200609 |