CN117627376B - Integral installation construction method for modularized steel girder and purline - Google Patents
Integral installation construction method for modularized steel girder and purline Download PDFInfo
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- CN117627376B CN117627376B CN202410103919.7A CN202410103919A CN117627376B CN 117627376 B CN117627376 B CN 117627376B CN 202410103919 A CN202410103919 A CN 202410103919A CN 117627376 B CN117627376 B CN 117627376B
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- 238000012423 maintenance Methods 0.000 claims abstract description 60
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Abstract
The invention discloses a modularized steel girder and purline integral installation construction method, which comprises the following steps: checking and accepting the roof main body structure; measuring and paying off; assembling a jig frame and manufacturing a hoisting bracket; installing a roof steel girder; carrying out purlin supporting installation; maintaining structural purlin installation; checking and accepting the combined structure; the combined structure is installed at high altitude; and checking and accepting the roof girder steel and the maintenance structure purline system. Reasonably dividing sections according to a steel structure roof girder and a maintenance structure purline system, forming a relatively stable structure of the structure girder, purline support and roof purline on the ground, and integrally hoisting by means of a bracket; the assembly welding work is completed on the ground, so that the mechanical and labor costs are reduced; the integral installation speed of the roof girder and the purline system of the maintenance structure is greatly improved, and the existing tower crane is used for completing the main mechanical construction procedure in the roof maintenance structure of the building; the purline with the rapid construction and maintenance structure provides powerful support for secondary structure and interior decoration installation, and has high popularization value.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a modularized steel girder and purline integral installation construction method.
Background
The large-scale functional stadium has the building scale and project ratio increased year by year along with the national economic construction, but is limited by project planning or the design effect of the interior and the exterior of the building, and simultaneously, the factors of influencing the structural safety, such as roof drainage efficiency, snow accumulation reduction and the like are considered. On the premise of not changing the indoor building effect or increasing the height of the main structure of the roof, increasing the purline support height to improve the roof drainage effect or meet the building form becomes a main method. The purline support height is increased, the safety, quality and cost of the purline support and the purline in bulk in high altitude according to the traditional method are difficult to control, and how to simply and efficiently install the purline part of the roof system becomes a main problem of the roof structure.
The prior art deals with the disadvantages of this problem: the traditional method comprises two construction procedures of steel structure girder installation, roof support and purline installation, wherein the high-altitude bulk installation is not dominant in quality control, installation guarantee and installation speed, and the procedures of checking and accepting in the procedure connection process are complex, so that the construction period waste is increased in the handover procedure, and the flow construction is not facilitated.
Disclosure of Invention
Therefore, the invention provides a modularized steel beam and purline integral installation construction method, which aims to solve the problems of high construction difficulty, high safety risk, long construction period and difficult control of installation quality according to the traditional method in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
According to a first aspect of the invention, a method for integrally installing and constructing a modularized steel beam and a purline comprises the following steps:
s100, checking and accepting the roof main body structure;
Step S200, measuring and paying-off;
S300, manufacturing an assembling jig frame and a hoisting bracket;
Step S400, roof steel girder installation is carried out;
s500, carrying out purline support installation;
Step S600, mounting a maintenance structure purline;
Step S700, checking and accepting a combined structure;
Step S800, installing the combined structure at high altitude;
And step 900, checking and accepting the roof girder steel and the purline system with the maintenance structure.
Further, the step S100 specifically includes:
Step S110, performing self-checking acceptance on the roof structure by using a three-dimensional laser scanning technology, determining the arching residual value of the dead weight state of the roof structure, and comparing with the overall simulation calculation result to determine the final installation height of the purline of the maintenance structure;
Step S120, before installing the steel structure roof girder and maintaining the structure purline system combined structure, the safety protection measures of the roof structure must be checked and checked.
Further, the step S200 specifically includes:
Step S210, marking the installation position of the roof girder on the secondary truss gusset plate by using a total station, and comparing the ground assembled combined structure with the state of the ground assembled combined structure in place by combining a three-dimensional laser scanning technology;
And S220, placing the assembly jig and the positioning line of the assembly roof steel girder and maintenance structure purline system combined structure on the ground according to roof measurement and scanning results.
Further, the step S300 specifically includes:
step S310, a combined structure assembly jig of a roof girder and a maintenance structure purline system is a simple jig, and two ends of the roof girder are supported and fixed to provide a horizontal positioning platform of the combined structure;
And step 320, determining the specification and the size of the manufacturing material of the hoisting bracket according to the actual hoisting weight and combining the calculation result, wherein the lifting lugs connected with the hoisting machine need to penetrate through the hoisting bracket, and the lifting lugs at the two ends of the steel girder of the hoisting roof can be directly welded below the bracket according to the position.
Further, the step S400 specifically includes:
step S410, placing roof steel beams according to the positioning lines, wherein the spacing and the verticality of the roof steel beams are required to meet the standard requirements;
And S420, placing steel scaffold plates at the end part of the roof steel beam and the inner side of the purline support, and firmly binding the steel scaffold plates with the roof steel beam by using No. 8 iron wires to serve as an operation platform for ground assembly and high-altitude installation.
Further, the step S500 specifically includes:
S510, placing purline support positioning lines on a roof steel girder, installing supports according to the positioning lines, and controlling the verticality of the supports by using a horizontal ruler;
And step 520, adjusting the mounting height of the purline support according to the roof three-dimensional scanning and measurement feedback data.
Further, the step S600 specifically includes:
Step S610, before the purline is installed, checking purline brackets, ensuring that the bracket specification and size meet the drawing requirements, arranging the positions according to the requirements, and ensuring that the welding seam connected with the roof steel girder has no obvious defect and the welding leg size meets the requirements;
Step S620, fixing purlines and lugs by using common bolts, and installing the purlines needs to ensure the interval between the purlines, the interface misalignment of the purlines and lateral bending.
Further, step S700 specifically includes:
Step S710, checking the repair paint condition of a welding seam and a node which are connected with the roof girder when checking and accepting the roof girder and maintaining the structure purline combined structure, and checking whether the specification and the size of the roof girder and the purline deviate from a drawing;
And step S720, carrying out three-dimensional laser scanning on the assembled roof steel girder and maintenance structure purline combined structure, and comparing the three-dimensional laser scanning with a roof scanning result.
Further, step S800 specifically includes:
Step S810, mounting the roof girder and the purline combined structure of the maintenance structure at high altitude by using a hoisting bracket, ensuring that each roof girder has two hoisting points, and respectively providing a chain block so as to independently adjust when the roof girders are in place;
Step S820, after the hoisting bracket is in place and stressed, a roof girder in the jig and a purline combined structure of a maintenance structure are adjusted by using a chain block, so that the height difference of the roof girder horizontally assembled in the jig is found out according to the requirement, and the high-altitude installation is completed quickly;
and step S830, arranging a light reflecting patch at the end part of the purline so as to carry out installation measurement and tracking measurement in the roof installation process after the purline is in place.
Further, the step S900 specifically includes: the ground is assembled and welded with the purline system combined structure of the maintenance structure, after the installation of the combined structure in all the high-altitude subareas is completed, the connection node and the integral position of the roof girder and the truss structure are checked and checked, and simultaneously, the three-dimensional laser scanning technology is used for carrying out auxiliary inspection on the whole roof structure, and the abnormal part is measured and checked.
The invention has the following advantages:
1. the steel structure roof steel girder with the sectional splicing capability and the maintenance structure purline system are spliced and welded on the ground in a blocking manner, so that the construction safety, quality control and cost effectiveness can be improved.
2. The high support for supporting the purlines is perpendicular to the roof steel girder, and when the roof steel girder is assembled on the ground, even if the in-place state of the roof steel girder has a height difference, the roof steel girder can be horizontally placed, and the roof steel girder and the maintenance structure purline system can be conveniently assembled and welded.
3. After the ground assembly welding is finished, hoisting the integral structure to a preset position by using a hoisting mechanism through a bracket; the mode not only improves the construction efficiency, but also ensures the safety, and avoids the risk of manually carrying the support and purline in the overhead operation.
Drawings
Fig. 1 is a flow chart of a method of integrally installing and constructing a modular steel girder and purline according to some embodiments of the present invention.
Fig. 2 is a schematic structural diagram of a modular steel girder and purlin integrally installed construction method for installing a roof steel girder according to some embodiments of the present invention.
Fig. 3 is a schematic structural diagram of purline bracket installation according to a method for integrally installing and constructing a modularized steel girder and purlines according to some embodiments of the present invention.
Fig. 4 is a schematic structural view of a combined structure of a modular steel girder and purline integral installation construction method according to some embodiments of the present invention.
Fig. 5 is a schematic structural diagram of a roofing girder and maintenance structure purline system acceptance of a method for integrally installing and constructing modular girders and purlines according to some embodiments of the present invention.
The reference numerals are explained as follows: 1. roof girder steel, 2, roof girder steel location bed-jig, 3, roof girder steel locating line, 4, bed-jig locating line, 5, purlin support locating line, 6, purlin support, 7, chain block, 8, hoist and mount bracket, 9, run through lug, 10, hoist and mount wire rope, 11, roof truss, 12, roof girder steel connected node, 13, purlin.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1 to 5, a method for integrally installing and constructing a modularized steel girder and a purline according to an embodiment of a first aspect of the present invention includes the following steps:
s100, checking and accepting the roof main body structure;
Step S200, measuring and paying-off;
S300, manufacturing an assembling jig frame and a hoisting bracket;
Step S400, roof steel girder installation is carried out;
s500, carrying out purline support installation;
Step S600, mounting a maintenance structure purline;
Step S700, checking and accepting a combined structure;
Step S800, installing the combined structure at high altitude;
And step 900, checking and accepting the roof girder steel and the purline system with the maintenance structure.
In the above embodiment, it should be noted that: the steel structure steel girder above the roof truss is used for installing and maintaining structural roof purline brackets and reducing the length outside the secondary truss surface of the roof. Purlin support: and supporting and maintaining the structural roof purline. Roof purlin: and fixing the roof bottom plate.
The technical effects achieved by the embodiment are as follows: the construction method is characterized in that the structural steel beam, purline support and roof purline form a relatively stable structure on the ground according to the reasonable division sections of the steel structural roof steel beam and the maintenance structural purline system, and the construction method is implemented by integrally hoisting the bracket. The main assembling and welding work is completed on the ground, so that the mechanical and labor costs are reduced. The integral installation speed of the roof girder steel and the purline system of the maintenance structure is also greatly improved, the high-altitude hoisting frequency is reduced from 13000 times to 650 times, and the construction process of mainly using machinery in the roof maintenance structure of the building can be completed by using the existing tower crane. In addition, the maintenance structure purline of quick construction provides powerful support for secondary structure and interior decoration installation, has very high spreading value.
Application example: the construction method is practically applied to the project of the second period of the new national exhibition, and the total construction area of the project is 6110034 square meters, wherein the area responsible for construction by the unit of me is totally 6 monomers, and the north to south is sequentially provided with a matched hotel, a non-column exhibition hall E4, a column exhibition hall 3, an east login hall, a column exhibition hall east 2 and a column exhibition hall east 1. The east login hall is an east main entrance of the whole project, the plane size of the roof modeling is 270m multiplied by 170m, the image characteristics of the eave are outstanding, the main entrance image of the Hakko is molded together with an east etiquette square, the main structure is formed by one layer of local two layers and three layers on the ground, and the main steel structure comprises a frame structure, a 16.75m combined steel beam, a roof truss, a sequential hall, an arc truss, a door head area floor arch, a connecting steel truss, overhanging and a roof steel beam, wherein 2750 roof steel beams are arranged, 1000t are arranged in total, 5500 purlins are supported by a maintenance structure, 135t are arranged in weight, 5600 purlins are arranged in a maintenance structure, 140t are arranged in weight, the number of system components of the purlins is large, the weight of single components is small, the installation height is mainly 30 m-37 m, the construction difficulty is large according to the traditional method, the safety risk is high, the construction period is long, and the installation quality is difficult to control. The east logging-in hall maintenance structure purline system out-of-order hall structure and arc truss area are installed by using modularized combined structures in other areas due to irregular reasons.
Example 2
As shown in fig. 1 to 5, a method for integrally installing and constructing a modular steel girder and purline includes the whole contents of embodiment 1, and further includes the steps of:
S100, checking and accepting the roof main body structure; the step S100 specifically includes: step S110, performing self-checking acceptance on the roof structure by using a three-dimensional laser scanning technology, determining the arching residual value of the dead weight state of the roof structure, and comparing with the overall simulation calculation result to determine the final installation height of the purline of the maintenance structure; step S120, before installing the steel structure roof girder and maintaining the structure purline system combined structure, the safety protection measures of the roof structure, such as the erection of the safety net, the safety rod and the safety rope, must be checked and accepted to ensure the safety of the high-altitude constructor.
Step S200, measuring and paying-off; the step S200 specifically includes: step S210, marking the installation position of the roof girder on the secondary truss gusset plate by using a total station, and comparing the ground assembled combined structure with the state of the ground assembled combined structure in place by combining a three-dimensional laser scanning technology; and S220, placing the assembly jig and the positioning line of the assembly roof steel girder and maintenance structure purline system combined structure on the ground according to roof measurement and scanning results.
S300, manufacturing an assembling jig frame and a hoisting bracket; the step S300 specifically includes: step S310, a combined structure assembly jig of a roof girder and a maintenance structure purline system is a simple jig, and two ends of the roof girder are supported and fixed to provide a horizontal positioning platform of the combined structure; and step 320, determining the specification and the size of the manufacturing material of the hoisting bracket according to the actual hoisting weight and combining the calculation result, wherein the lifting lugs connected with the hoisting machine need to penetrate through the hoisting bracket, and the lifting lugs at the two ends of the steel girder of the hoisting roof can be directly welded below the bracket according to the position.
Step S400, roof steel girder installation is carried out; the step S400 specifically includes: step S410, placing roof steel beams according to the positioning lines (as shown in fig. 2), wherein the spacing and the perpendicularity of the roof steel beams are required to meet the standard requirements; and S420, placing steel scaffold plates at the end part of the roof steel beam and the inner side of the purline support, and firmly binding the steel scaffold plates with the roof steel beam by using No. 8 iron wires to serve as an operation platform for ground assembly and high-altitude installation.
S500, carrying out purline support installation; the step S500 specifically includes: step S510, placing purline support positioning lines (shown in fig. 3) on the roof steel girder, installing supports according to the positioning lines, and controlling the verticality of the supports by using a horizontal ruler; step S520, according to the three-dimensional scanning and measurement feedback data of the roof, the mounting height of the purline support is adjusted, and if necessary, the purline support can be designed to be a telescopic support so as to meet the adjustment requirement during the mounting period of the roof structure.
Step S600, mounting a maintenance structure purline; the step S600 specifically includes: step S610, before the purline is installed, checking purline brackets, ensuring that the bracket specification and size meet the drawing requirements, arranging the positions according to the requirements, and ensuring that the welding seam connected with the roof steel girder has no obvious defect and the welding leg size meets the requirements; step S620, fixing purlines and lugs by using common bolts, and installing the purlines needs to ensure the interval between the purlines, the interface misalignment of the purlines and lateral bending.
Step S700, checking and accepting a combined structure; the step S700 specifically includes: step S710, checking the repair paint condition of a welding seam and a node which are connected with the roof girder when checking and accepting the roof girder and maintaining the structure purline combined structure, and checking whether the specification and the size of the roof girder and the purline deviate from a drawing; and step S720, carrying out three-dimensional laser scanning on the assembled roof girder steel and maintenance structure purline combined structure, comparing the three-dimensional laser scanning with a roof scanning result, and modifying and adjusting the combined structure on the ground if necessary.
Step S800, installing the combined structure at high altitude; the step S800 specifically includes: step S810, mounting the roof girder and the purline combined structure of the maintenance structure at high altitude by using a hoisting bracket, ensuring that each roof girder has two hoisting points, and respectively providing a chain block so as to independently adjust when the roof girders are in place (as shown in figure 4); step S820, after the hoisting bracket is in place and stressed, a roof girder in the jig and a purline combined structure of a maintenance structure are adjusted by using a chain block, so that the height difference of the roof girder horizontally assembled in the jig is found out according to the requirement, and the high-altitude installation is completed quickly; and step S830, arranging a light reflecting patch at the end part of the purline so as to carry out installation measurement and tracking measurement in the roof installation process after the purline is in place.
Step S900, checking and accepting a roof girder and a purline system with a maintenance structure; the step S900 specifically includes: the ground has assembled roof girder steel and maintenance structure purlin system integrated configuration, welding quality inspection and acceptance, and after the installation of the integrated configuration was accomplished in the whole subregion in high altitude, inspection and acceptance roof girder steel and truss structure's connected node, whole position (as shown in fig. 5), use three-dimensional laser scanning technique to the whole supplementary inspection of roof structure simultaneously, unusual position is measured and is rechecked, can adjust if necessary to guarantee the final shaping effect of roof structure.
In fig. 2 to 5, the number 1 is a roof girder; the serial number 2 is a roof girder steel positioning jig frame; the serial number 3 is a roof girder locating line; the serial number 4 is a jig frame positioning line; the serial number 5 is a purline supporting and positioning line; the serial number 6 is a purline bracket; the serial number 7 is a chain block; the serial number 8 is a hoisting bracket; the serial number 9 is a through lifting lug; the serial number 10 is a hoisting steel wire rope; the serial number 11 is a roof truss; the serial number 12 is a roof girder steel connecting node; the number 13 is purlin.
The technical effects achieved by the embodiment are as follows:
1. the steel structure roof steel girder with the sectional splicing capability and the maintenance structure purline system are spliced and welded on the ground in a blocking manner, so that the construction safety, quality control and cost effectiveness can be improved.
2. The high support for supporting the purlines is perpendicular to the roof steel girder, and when the roof steel girder is assembled on the ground, even if the in-place state of the roof steel girder has a height difference, the roof steel girder can be horizontally placed, and the roof steel girder and the maintenance structure purline system can be conveniently assembled and welded.
3. After the ground assembly welding is finished, hoisting the integral structure to a preset position by using a hoisting mechanism through a bracket; the mode not only improves the construction efficiency, but also ensures the safety, and avoids the risk of manually carrying the support and purline in the overhead operation.
The purpose of the above embodiments is:
1. Through reasonable optimization process, utilize steel construction and maintenance structure to bear the weight characteristics in design service condition jointly, carry out the whole combination installation of subregion to roofing girder steel and maintenance structure purlin part, make each work go on in the best order, avoid repetition operation and time limit for a project extravagant to the safety quality is controlled more easily.
2. The simple jig frame is used for carrying out ground modularized assembly welding on the steel girder and the roof purline, so that the method has the advantages of safety, quality and cost control, and time is saved in the installation period.
3. The purlin support is perpendicular to roofing girder steel, is long round hole to wearing screw connection with maintenance structure purlin connected node, can make the roofing girder steel of co-altitude not use same bed-jig level to place when ground is assembled, bed-jig reuse rate is high.
4. And manufacturing a hoisting bracket, carrying out modularized hoisting, and ensuring that each roof girder in the steel structure roof girder and maintenance structure purline combined structure has two hoisting points so as to be stable during the hoisting and installation of the combined structure.
5. After the ground assembly and welding are completed, the combined structure can be integrally hoisted to a preset position by using a hoisting machine. This way, the lifting efficiency can be improved and the safety can be ensured.
6. Before the floor of the combined structure of the roof girder and the purline of the maintenance structure is assembled, the arch forming residual value of the roof structure is determined by means of a three-dimensional laser scanning technology, and the assembled size of the combined structure is adjusted on the floor by comparing the arch forming residual value with the whole simulation calculation.
7. After the ground assembly and welding of the combined structure are completed, quality inspection and acceptance are carried out to ensure that the assembly and welding quality meets the standard. If necessary, the repairing and adjusting operation on the ground is convenient.
Specific examples: the total of the eastern login hall roof girders is about 1755, mainly comprises two specifications, namely HN350, HN 7, HN 11, HN400, HN 8 and HN 13t, and the bolts comprise HS8.8M22, HS8.8M22, 70, HS8.8M22, 95 and the like, and are 8.8-level common bolts according to design requirements. In addition, the steel girder assembly comprises two sides of the cantilever part which are welded in a surrounding manner, and the rear part can be installed according to the check of each steel girder drawing during installation. The total weight of the roof girder is about 1000t.
The eastern login hall roof girder member has large specification, wide occupied area, maximum installation height of about 36m and high installation height, the roof truss area girder is mainly installed by using a tower crane, and the floor arch area roof girder is installed by using a crawler crane and an automobile crane in a matched manner. In addition, the roof girder steel is required to be installed, the roof girder steel and the purline with the maintenance structure are required to be assembled on the whole ground and then hoisted, and the installation control difficulty is high.
Taking notice of high-altitude installation of roof steel beams: before hoisting, the roof steel beam must be comprehensively rechecked, such as the positioning axis, elevation, number, length, section size, screw hole diameter and position of the roof steel beam, the surface quality of the gusset plate, and the like, and the roof steel beam can be installed after the design construction drawing and specification are met. The steel wire brush is used for removing rust and dirt on the friction surface, so that the smoothness of the connecting surface is ensured, and impurities such as burrs, greasy dirt, water, soil and the like are avoided. When the roof steel beam is fixedly installed by using 8.8-level bolt connection, the roof steel beam is fastened by using an electric wrench according to the design requirement without processing according to high-strength bolt connection pairs. Bolts for connecting the nodes are arranged in canvas bags according to the required quantity and hung at the end nodes of the purline, and one node uses one canvas bag.
Roof girder steel and maintenance structure purlin integral erection: the roof truss area, the arc truss area, the large arch connecting truss and other areas are constructed by adopting a method of integral hoisting after the roof girder and the purline of the maintenance structure are assembled and welded on the ground, so that the overhead workload is reduced.
The support is processed by Q235B steel, and the welding rod is E43xx type; the welding quality meets the related requirements of reinforcing steel bar welding and acceptance regulations, and the welding seam grade is three-grade welding seam; after welding, welding slag should be removed, cracks, surface slag inclusion, surface air holes, weld flash and other defects are not allowed to appear, the surface of the welding seam needs to be beautiful and smooth, and the quality control requirement is met; the surface of the steel is treated by hot galvanizing, and the average thickness of a zinc layer is more than or equal to 70 mu m; the roofing purline is processed by adopting a steel rectangular tube with the thickness of 80-60-4 mm, the material Q235B is adopted, the surface of the steel is subjected to hot galvanizing treatment, and the average thickness of a zinc layer is more than or equal to 70 mu m. Roof girder steel and maintenance structure purlin installation first needs fixed roof girder steel, and roof girder steel is fixed needs the preparation bed-jig location.
After the roof girder steel is positioned, inspected and reinforced, roof structure supports and purlines are installed, brackets are used for hoisting, two ends of each roof girder steel are hoisted during hoisting, the weight of the whole small spliced unit is below 7t (wherein the weight of the hoisted brackets is 3 t), and the steel wire ropes with the diameter of 21.5 are used for hoisting.
The space between roof girder steel mainly divides two kinds of structural style, and roof truss district and big arch even are connected truss district girder steel, and its interval and length are all different, adopts two kinds of bracket form integral hoisting, can continue to use with bracket rotation angle after the different position conversion.
Notice that:
1. The roof girder installation support is positioned and installed after two ends of the roof girder are placed horizontally;
2. the roof girder steel and the maintenance structure purline integral hoisting bracket are welded and the lifting lug needs to penetrate 245 x 12 round pipes, and the height of the lifting lug steel plate is 400mm;
3. The direct hanging roof girder needs 8 groups of new 3t chain blocks, and the steel needs to be checked before each shift, and the steel is carefully protected in the installation process;
4. The purline installation attention control of the maintenance structure cannot bend;
5. the hoisting deformation is larger after the roof girder and the maintenance structure purlines form the small splicing unit, the hoisting is required to be carried out for 20 minutes before each hoisting, and hidden dangers of influencing safety factors such as obvious deformation of the structure are observed.
The steel springboards are paved at the two ends of the roof steel beam through the integral hoisting combined structure, steel wires are used between the steel springboards and the roof steel beam to be firmly bound, and the steel springboards are hoisted after inspection.
In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
In the description of the present specification, a description referring to terms "embodiment one", "embodiment two", "example", "specific example", or "some examples", etc., means that a specific method, apparatus, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, methods, apparatus, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (1)
1. The integral installation construction method of the modularized steel girder and the purline is characterized by comprising the following steps of:
s100, checking and accepting the roof main body structure;
Step S200, measuring and paying-off;
S300, manufacturing an assembling jig frame and a hoisting bracket;
Step S400, roof steel girder installation is carried out;
s500, carrying out purline support installation;
Step S600, mounting a maintenance structure purline;
Step S700, checking and accepting a combined structure;
Step S800, installing the combined structure at high altitude;
Step S900, checking and accepting a roof girder and a purline system with a maintenance structure;
the step S100 specifically includes:
Step S110, performing self-checking acceptance on the roof structure by using a three-dimensional laser scanning technology, determining the dead weight state of the roof structure and the arching residual value of the roof structure, and comparing the dead weight state with the whole simulation calculation result to determine the final installation height of the purline of the maintenance structure;
step S120, before installing the combined structure of the steel structure roof girder and the maintenance structure purline system, checking and accepting the safety protection measures of the roof structure;
the step S200 specifically includes:
Step S210, marking the installation position of the roof girder on the secondary truss gusset plate by using a total station, and comparing the ground assembled combined structure with the state of the ground assembled combined structure in place by combining a three-dimensional laser scanning technology;
step S220, positioning lines of an assembly jig and an assembly roof steel girder and maintenance structure purline system combined structure are placed on the ground according to roof measurement and scanning results;
The step S300 specifically includes:
Step S310, a combined structure assembly jig of a roof girder and a maintenance structure purline system is a simple jig, and two ends of the roof girder are supported and fixed, so that a horizontal positioning platform of the combined structure is provided;
step S320, determining the specification and the size of a hoisting bracket manufacturing material according to the actual hoisting weight and combining the calculation result, wherein lifting lugs connected with hoisting machinery need to penetrate through the hoisting bracket, and lifting lugs at two ends of a hoisting roof steel beam are directly welded below the bracket;
The step S400 specifically includes:
step S410, placing roof steel beams according to the positioning lines, wherein the spacing and the verticality of the roof steel beams are required to meet the standard requirements;
Step S420, placing steel scaffold plates at the end part of the roof steel beam and the inner side of the purline support, and firmly binding the steel scaffold plates with the roof steel beam by using No. 8 iron wires to serve as an operation platform for ground assembly and high-altitude installation;
The step S500 specifically includes:
S510, placing purline support positioning lines on a roof steel girder, installing supports according to the positioning lines, and controlling the verticality of the supports by using a horizontal ruler;
Step S520, adjusting the mounting height of the purline support according to the roof three-dimensional scanning and measurement feedback data;
The step S600 specifically includes:
Step S610, before the purline is installed, checking purline brackets, ensuring that the bracket specification and size meet the drawing requirements, arranging the positions according to the requirements, and ensuring that the welding seam connected with the roof steel girder has no obvious defect and the welding leg size meets the requirements;
step S620, fixing purlines and the lugs by using common bolts, wherein the installation of the purlines needs to ensure the interval between the purlines, the staggered edges of the interfaces of the purlines and the lateral bending;
the step S700 specifically includes:
Step S710, checking the repair paint condition of a welding seam and a node which are connected with the roof girder when checking and accepting the roof girder and maintaining the structure purline combined structure, and checking whether the specification and the size of the roof girder and the purline deviate from a drawing;
step S720, carrying out three-dimensional laser scanning on the assembled roof girder steel and maintenance structure purline combined structure, and comparing the three-dimensional laser scanning with a roof scanning result;
The step S800 specifically includes:
Step S810, mounting the roof girder and the purline combined structure of the maintenance structure at high altitude by using a hoisting bracket, ensuring that each roof girder has two hoisting points, and respectively providing a chain block so as to independently adjust when the roof girders are in place;
Step S820, after the hoisting bracket is in place and stressed, a roof girder in the jig and a purline combined structure of a maintenance structure are adjusted by using a chain block, so that the height difference of the roof girder horizontally assembled in the jig is found out according to the requirement, and the high-altitude installation is completed quickly;
Step S830, arranging a reflective patch at the end part of the purline so as to perform installation measurement and tracking measurement in the roof installation process after the purline is in place;
The step S900 specifically includes: the method comprises the steps that a roof girder and a purline system combined structure of a maintenance structure are assembled on the ground, welding quality is checked and accepted, after the installation of the combined structure in all subareas in a high altitude is completed, the connection node and the integral position of the roof girder and a truss structure are checked and accepted, meanwhile, the three-dimensional laser scanning technology is used for carrying out auxiliary inspection on the whole roof structure, and abnormal parts are measured and rechecked;
before hoisting, the roof steel beam is required to be comprehensively rechecked according with the positioning axis, elevation, number, length, section size, screw hole diameter and position of the roof steel beam and the surface quality of the gusset plate, and the roof steel beam can be installed after the design construction drawing and specification are met; removing rust and dirt on the friction surface by using a steel wire brush, and ensuring that the connection surface is smooth and free of burrs, flash edges, greasy dirt, water, soil and sundries;
the roof truss area, the arc truss area and the large arch connecting truss area are constructed by adopting a method of integral hoisting after the roof girder and the maintenance structure purlines are assembled and welded on the ground, so that the overhead workload is reduced.
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