CN118241797A - Large-span space grid steel roof structure and construction process - Google Patents
Large-span space grid steel roof structure and construction process Download PDFInfo
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- CN118241797A CN118241797A CN202410550788.7A CN202410550788A CN118241797A CN 118241797 A CN118241797 A CN 118241797A CN 202410550788 A CN202410550788 A CN 202410550788A CN 118241797 A CN118241797 A CN 118241797A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000010276 construction Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 title claims abstract description 29
- 238000003466 welding Methods 0.000 claims abstract description 45
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000013461 design Methods 0.000 claims description 9
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 4
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- 230000001276 controlling effect Effects 0.000 description 3
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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
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
- E04B7/028—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs consisting of structures of pyramidal or conical shape
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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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to the technical field of construction of large-span net racks, and provides a large-span space grid steel roof structure and a construction process, wherein the construction process comprises the following steps: step one, lifting and assembling a partitioned floor; step two, lifting the supporting system; step three, controlling hydraulic synchronous lifting by a computer; folding and embedding; step five, unloading; step six, construction monitoring; the invention adopts floor assembly and block lifting construction, transfers the work of high-altitude splicing and high-altitude welding to the floor, effectively reduces the assembly height of the net frame and the work load of high-altitude splicing and welding, can better reduce the safety risk, control the construction quality, quicken the construction progress and save the construction cost, simultaneously reduces the influence on peripheral matched engineering, solves the problem that the large crane limited by the field in the prior art cannot be directly hoisted, and has obvious economic benefit and social benefit compared with the prior art.
Description
Technical Field
The invention relates to the technical field of large-span grid construction, in particular to a large-span space grid steel roof structure and a construction process.
Background
The net frame is a space structure formed by connecting a plurality of rods through nodes according to a certain grid form. The basic units constituting the net rack include triangular pyramid, square pyramid, truncated quadrangular pyramid, etc. and these basic units may be combined into triangular pyramid, square pyramid, hexagonal pyramid, circular pyramid, etc. Has the advantages of space stress, light weight, high rigidity, good earthquake resistance and the like. In recent years, with the new construction of large public projects such as high-speed rail station houses, airport terminal buildings, exhibition centers and the like, more and more large-span structure roofs adopt a steel mesh frame form. Due to the structural characteristics of large-span public buildings, peripheral construction conditions, construction period, construction cost and other factors, the conventional high-altitude bulk method, large-scale mechanical hoisting method and the like cannot meet the requirement of installing the steel grid roof above a large-area floor.
In order to effectively solve the problem that a large crane limited by a field cannot be directly hoisted, reduce the influence on peripheral matched engineering and provide a working face for the next procedure in advance, the applicant provides a large-span space grid steel roof structure and a construction process according to the experience of space grid structure construction for many years and the research and application of the large-scale crane in the aspect of computer-controlled hydraulic synchronous hoisting process.
Disclosure of Invention
The invention provides a large-span space grid steel roof structure and a construction process, which solve the problem that a large crane cannot be directly hoisted due to site limitation in the prior art.
The technical scheme of the invention is as follows: a construction process of a large-span space grid steel roof structure comprises the following steps:
Step one, lifting a segmented floor for assembly, dividing a plurality of small spliced units according to crane channels, finally combining the small spliced units into a whole segmented, wherein each small spliced unit consists of a grid frame rod piece and a welding ball welded with the grid frame rod piece, positioning welding is firstly adopted between the grid frame rod piece and the welding ball, welding is carried out from the middle to the periphery after the small spliced units are checked and collected, embedded and added and fixedly welded between the grid frame rod pieces of each small spliced unit, welding is carried out from the middle to two ends after the whole lifting segmented grid frame is checked and qualified, a grid frame floor assembled main body is formed, and then assembling is carried out on the grid frame floor assembled main body, so that a grid structure of a grid steel house is obtained;
Step two, lifting the support system, and designing four types of support systems by modeling and lofting one by one according to the model of the assembled grid structure;
The third step, the computer controls the hydraulic to synchronously lift, a distance sensor which measures the current component height is arranged below the lifting cylinder of each lifting point and is transmitted to the main control computer through the on-site real-time network, the distance sensor measures the height difference between the lifting point and the main lifting point according to the following condition of the lifting point, and the main control computer controls the control quantity of the lifting point hydraulic valve according to the current height difference of the following lifting point, so that the position synchronization of each following lifting point and the main lifting point is realized;
Folding and embedding, namely arranging a folding section at the joint of the grid structures at two similar different lifting positions, installing the folding section in an embedding mode after the integral lifting and installation of the grid structures at two areas to be lifted are finished, actually measuring the surface temperature of each component of the grid structures before folding, selecting folding temperature according to design requirements, accurately measuring coordinates of the ports of the components at the folding position by using a total station after folding, adjusting the precision of embedded rod pieces after adding corresponding welding shrinkage residual values, and installing the embedded rod pieces by using an automobile crane or a winch to obtain a large-span space grid steel roof structure;
Unloading, namely unloading a large-span space grid steel roof structure by adopting a main control computer to control an integral descent technology, unloading by using a lifting oil cylinder step by step load reduction mode, synchronously operating by a unified command, and unloading step by step according to 10%, 30%, 50%, 70%, 90% and 100%;
Step six, construction monitoring, namely setting an observation point on the lower chord ball of the net rack, attaching a reflection measurement patch according to the position of the selected observation point, observing and recording observation data on the position of a lifting point before lifting, observing and recording the observation point in the lifting process and lifting in place of the net rack structure, feeding back the observation data to related technicians in time, and stopping lifting and correspondingly adjusting immediately if abnormality occurs.
Preferably, the step of assembling the grid floor in the step one includes:
firstly, scribing a roof floor and erecting an assembly jig;
Secondly, positioning a lower chord welding ball of the net rack;
thirdly, installing a net rack lower chord member;
fourthly, positioning a net rack upper chord welding ball and installing a web member;
fifthly, installing upper chord members of the net rack;
sixth, checking the small spelling unit;
And seventhly, welding the rod piece and detecting a welding line.
Preferably, the four support systems in the second step include:
the method comprises the steps that firstly, a column top lifting frame is additionally arranged on a column top, a bracket is welded on the column top, and temporary rod pieces and short pipes of lifting nodes are designed for lifting;
The second type is that the ball joint triangular lattice supports a lifting frame, and a lifting appliance is welded on an original joint ball;
Thirdly, supporting a lifting frame by a cast steel node lattice, and welding a lifting appliance on the cast steel node of the original structure net frame;
and fourthly, supporting the lifting frame by the ball joint four-sided lattice, and welding the lifting tool on the original structural ball.
Preferably, the lifting appliance has a structural mode comprising:
Mode one: when the type of the lifting oil cylinder is 100t, the lifting ball specification WSR4516 is over, and a single lug plate is welded to the ball joint;
Mode two: when the lifting oil cylinder model adopts 200t, lifting ball specification WSR5522 is above, adopts the binaural board to weld on the ball node, and trades the ball when the original design ball node does not satisfy the requirement, and the otic placode adopts 25mm thick steel sheet equipment.
The second, third and fourth types directly fall on the concrete floor, and the foundation adopts a double-spliced HM588 x 300 conversion steel beam, so that lifting load can be transferred to the concrete frame beams and columns, and embedded parts are arranged on the concrete beams in advance.
Preferably, in the third step, an oil pressure sensor is installed on each lifting oil cylinder at the lifting point, the main control computer monitors the load change condition of each lifting point through an on-site real-time network of the oil pressure sensor, and if the load of the lifting point has abnormal abrupt change, the main control computer automatically closes the lifting action of the lifting point and gives an alarm for indication.
Preferably, a position sensor is installed on the lifting cylinder of each lifting point in the third step, the position sensor monitors the position condition of the lifting cylinder and the tightness conditions of the upper anchorage device and the lower anchorage device in real time, the current state of all the lifting cylinders can be obtained by the main control computer through a field real-time network, and the next step of action of the lifting cylinder can be determined by the main control computer according to the current state of the lifting cylinder and the control requirement of a comprehensive user.
The large-span space grid steel roof structure is manufactured by the construction process of the large-span space grid steel roof structure.
The beneficial effects of the invention are as follows:
1. The invention adopts floor assembly and block lifting construction, transfers the work of high-altitude splicing and high-altitude welding to the floor, effectively reduces the assembly height of the net frame and the work load of high-altitude splicing and welding, can better reduce the safety risk, control the construction quality, quicken the construction progress and save the construction cost, simultaneously reduces the influence on peripheral matched engineering, solves the problem that the large crane limited by the field in the prior art cannot be directly hoisted, and has obvious economic benefit and social benefit compared with the prior art;
2. According to the design drawing and combining with the submitting sequence of the civil engineering working face, when the height difference of the grid structure is large, the height of the assembled tire frame is reduced, secondary accumulated lifting is adopted, lifting block assembly sites are arranged on the same floor for reducing the high-altitude embedding and supplementing workload among grid blocks, the lifting block assembly sites are divided into small blocks again according to the floor faces with different elevations when the grid projection faces are distributed on different floors, and construction is carried out through secondary and repeated lifting, so that the effects of reducing the assembling height and reducing the high-altitude embedding and supplementing are finally achieved;
3. The design of the lifting support system fully considers the aspects of engineering actual conditions, grid structure characteristics, lifting system performance, influence of various adverse factors and the like, ensures the stability, safety, construction operability and the like of the lifting process, and ensures that no structural potential safety hazard occurs in the lifting process;
4. The invention defines the force transmission route of the structure before the lifting of the net rack so as to better carry out simulation, analog, calculation and analysis, pre-judge the stress performance of the structure in the construction process, make corresponding reinforcement and other measures, and according to the design of a lifting support system, the lifting support is designed into two forms: a column top lifting bracket and a non-column top lifting bracket (temporary lifting bracket);
5. According to the characteristics of the grid structure, the invention combines the actual conditions on site and the progress of the civil building floor, the grid is assembled into lifting blocks on the floor at the projection position, a 'secondary positioning method of the jig frame' is adopted in the assembling process, the embedded parts of the floor of the jig frame are assembled to complete the first positioning, and the secondary accurate measurement of the lower chord welding balls of the grid on the top steel plate of the jig frame are positioned;
6. The invention adopts the computer-controlled hydraulic synchronous lifting technology, and realizes the action synchronization of controlling all lifting cylinders through the master control computer with millimeter-level fine tuning function. The net rack is lifted to a preset position through a lifting support system to be installed in place by uniformly commanding and allocating the net rack lifting setting master control room. After the procedures of fine adjustment, folding, embedding, unloading and the like of the net frame, the installation of the steel net frame of the roof is realized.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a net rack lifting process flow in the present invention;
FIG. 2 is a schematic diagram of the classification of the grid assembly positioning jig of the present invention;
FIG. 3 is a schematic view of a type one configuration of the lift support system of the present invention;
FIG. 4 is a schematic view of a type two configuration of the lift support system of the present invention;
FIG. 5 is a schematic view of a three-structure of the type in which the lift support system of the present invention is configured;
FIG. 6 is a schematic view of a fourth type of structure in the lift support system arrangement of the present invention;
FIG. 7 is a schematic view of a 100t class lifting point spreader in a lifting support system configuration in accordance with the present invention;
FIG. 8 is a schematic diagram of a 200t class lifting point spreader in a lifting support system configuration in accordance with the present invention;
FIG. 9 is a schematic view of a three-bottom foundation structure of the lift support system of the present invention;
FIG. 10 is a schematic view of the structure of the lifting support system of the present invention from another perspective with three bases of the type provided;
FIG. 11 is a schematic diagram of the computer controlled hydraulic synchronous lifting system of the present invention;
FIG. 12 is a schematic view of a cross-sectional configuration of a type in which the lift support system of the present invention is configured;
FIG. 13 is a schematic view of a two-section structure of the type in which the lift support system of the present invention is configured.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill 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.
The invention provides a scheme that: a construction process of a large-span space grid steel roof structure comprises the following steps:
Step one, lifting a segmented floor for assembly, dividing a plurality of small spliced units according to crane channels, finally combining the small spliced units into a whole segmented, wherein each small spliced unit consists of a grid rod piece and a welding ball welded with the grid rod piece, the grid rod piece and the welding ball are welded by adopting positioning welding firstly, after the small spliced units are checked and collected, the grid rod pieces between each small spliced unit are welded from the middle to the periphery, embedded and reinforced welding is adopted, after the whole lifting segmented grid is checked and qualified, the grid rod pieces are welded from the middle to the two ends to form a grid floor assembled main body, 1 jig frame is arranged below each lower chord ball, a CAD three-dimensional simulation technology is adopted to collect three-dimensional coordinate values of ball joints from a lifting segmented grid model, and a jig frame secondary positioning method is adopted in the grid assembling process: setting up an assembled jig frame embedded part to finish the first positioning; setting up assembled jig frame embedded parts on a floor according to the actual plane projection coordinates of the grid frame block whole to finish the first positioning; after the assembly of the jig frame is completed, secondarily and finely measuring the coordinates of the lower chord welding ball of the net frame on the upper surface of the steel plate of the top of the jig frame, keeping the weld surface of the ball consistent with the plane of the lower chord, completing the positioning of the lower chord welding ball, positioning and limiting the lower chord welding ball better, arranging a positioning ring on the steel plate at the top of the upright rod of the jig frame, lofting the welding balls with different specifications by adopting CAD software, and then assembling on a main body assembled on the net frame floor to obtain the net frame structure of the grid steel house;
Step two, lifting the support system, and designing four types of support systems by modeling and lofting one by one according to the model of the assembled grid structure;
And thirdly, controlling hydraulic synchronous lifting by a computer, wherein a distance sensor for measuring the current component height is arranged below the lifting cylinder of each lifting point and is transmitted to a main control computer through a field real-time network, the distance sensor is used for measuring the height difference between the lifting point and the main lifting point according to the following condition of the lifting point, the main control computer is used for controlling the control quantity of the lifting point hydraulic valve according to the current height difference of the following lifting point, so that the position synchronization of each following lifting point and the main lifting point is realized, and the computer-controlled hydraulic synchronous lifting system consists of a steel strand, a lifting cylinder cluster (bearing component), a hydraulic pump station (driving component), a sensing detection system, a computer control (control component), a remote monitoring system and the like. In the lifting system, main lifting points are set, and other lifting points are regulated by taking the positions of the main lifting points as references. The main lifting speed is set by a proportional valve in a proportional hydraulic system, the maximum lifting speed is not more than 10 m/h, and the net rack lifting process flow can refer to figure 1;
Folding and embedding, namely arranging a folding section at the joint of the grid structures at two similar different lifting positions, installing the folding section in an embedding mode after the integral lifting and installation of the grid structures at two areas to be lifted are finished, actually measuring the surface temperature of each component of the grid structures before folding, selecting folding temperature according to design requirements, accurately measuring coordinates of the ports of the components at the folding position by using a total station after folding, adjusting the precision of embedded rod pieces after adding corresponding welding shrinkage residual values, and installing the embedded rod pieces by using an automobile crane or a winch to obtain a large-span space grid steel roof structure;
Unloading, namely unloading a large-span space grid steel roof structure by adopting a main control computer to control an integral descent technology, unloading by using a lifting oil cylinder step by step load reduction mode, synchronously operating by a unified command, and unloading step by step according to 10%, 30%, 50%, 70%, 90% and 100%;
Step six, construction monitoring, namely setting an observation point on the lower chord ball of the net rack, attaching a reflection measurement patch according to the position of the selected observation point, observing and recording observation data on the position of a lifting point before lifting, observing and recording the observation point in the lifting process and lifting in place of the net rack structure, feeding back the observation data to related technicians in time, and stopping lifting and correspondingly adjusting immediately if abnormality occurs.
The step of assembling the grid floor in the step one comprises the following steps:
firstly, scribing a roof floor and erecting an assembly jig, wherein the classification of the net rack assembly positioning jig can be referred to as figure 2;
Secondly, positioning a lower chord welding ball of the net rack;
thirdly, installing a net rack lower chord member;
fourthly, positioning a net rack upper chord welding ball and installing a web member;
fifthly, installing upper chord members of the net rack;
sixth, checking the small spelling unit;
And seventhly, welding the rod piece and detecting a welding line.
The four support systems in the second step comprise:
The method comprises the steps that firstly, a column top lifting frame is additionally arranged on a column top, a bracket is additionally arranged on the column top, a lifting bracket is welded, a temporary rod piece and a short pipe of a lifting node are designed for lifting, and a main pipe of the column top lifting bracket adopts D245 x 14; the supporting web members adopt steel pipes with the specifications of D180 x 8, D145 x 5 and the like, the top lifting beam adopts H-shaped steel with the specification of H500 x 200, and the column top lifting frame can refer to fig. 3 and 12;
the second type is a spherical node triangular lattice supporting lifting frame, a lifting appliance is welded on an original node ball, lifting is performed by utilizing the welding lifting appliance on the original node ball, and the spherical node triangular lattice supporting lifting frame can refer to fig. 4 and 13;
type three, a lifting frame is supported by a cast steel node lattice, a lifting appliance is welded on a cast steel node of an original structure grid frame, lifting is carried out by utilizing the welding lifting appliance on the original structure cast steel node, and the lifting frame can be referred to as a cast steel node lattice supporting lifting frame in fig. 5;
Type four, ball joint four-sided lattice support lifting frame, welding hoist on former structure ball, utilize former structure ball to weld hoisting point structure and promote to be used for two piecemeal rack to promote, ball joint four-sided lattice support lifting frame can refer to fig. 6.
The structural mode of the lifting appliance comprises the following steps:
Mode one: when the type of the lifting oil cylinder adopts 100t, the specification of the lifting ball is more than WSR4516, a single-lug plate is adopted to be welded to a ball node, and the specific structure can be referred to as figure 7;
Mode two: when the lifting oil cylinder model adopts 200t, lifting ball specification WSR5522 is above, adopts the binaural board to weld on the ball node, and trades the ball when former design ball node does not satisfy the requirement, and the otic placode adopts 25mm thick steel sheet equipment, and specific structure can refer to FIG. 8.
The second, third and fourth types directly fall on the concrete floor, the foundation adopts a double-spliced HM588 x 300 conversion steel beam, the bottom conversion beam adopts a double-spliced H-shaped steel of HW588 x 300, the materials are 345B, the lifting load can be transmitted to the concrete frame beam and column, embedded parts are preset on the concrete beam, the second, third and fourth types of bracket main pipes D609 x 10 are arranged, and the materials are Q235B; the web members are mainly steel pipes with specifications of D180 x8, D159 x8 and the like, and the materials are 345B, and referring to fig. 9 and 10, it should be noted that fig. 9 and 10 are basic structures of type three, and the types two and four are basic structures of type three, except for the number of H-section steel.
And in the third step, an oil pressure sensor is arranged on each lifting oil cylinder at the lifting point, a main control computer monitors the load change condition of each lifting point through an oil pressure sensor field real-time network, and if the load of the lifting point has abnormal abrupt change, the main control computer automatically closes the lifting action of the lifting point and gives an alarm for indication.
And thirdly, a position sensor is arranged on each lifting oil cylinder of each lifting point, the position sensor monitors the position condition of the lifting oil cylinder and the tightness conditions of the upper anchorage device and the lower anchorage device in real time, the current states of all the lifting oil cylinders can be obtained by a main control computer through a field real-time network, and the next action of the lifting oil cylinders can be determined by the main control computer according to the current states of the lifting oil cylinders and the control requirements of comprehensive users.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The construction process of the large-span space grid steel roof structure is characterized by comprising the following steps of:
Step one, lifting a segmented floor for assembly, dividing a plurality of small spliced units according to crane channels, finally combining the small spliced units into a whole segmented, wherein each small spliced unit consists of a grid frame rod piece and a welding ball welded with the grid frame rod piece, positioning welding is firstly adopted between the grid frame rod piece and the welding ball, welding is carried out from the middle to the periphery after the small spliced units are checked and collected, embedded and added and fixedly welded between the grid frame rod pieces of each small spliced unit, welding is carried out from the middle to two ends after the whole lifting segmented grid frame is checked and qualified, a grid frame floor assembled main body is formed, and then assembling is carried out on the grid frame floor assembled main body, so that a grid structure of a grid steel house is obtained;
Step two, lifting the support system, and designing four types of support systems by modeling and lofting one by one according to the model of the assembled grid structure;
The third step, the computer controls the hydraulic to synchronously lift, a distance sensor which measures the current component height is arranged below the lifting cylinder of each lifting point and is transmitted to the main control computer through the on-site real-time network, the distance sensor measures the height difference between the lifting point and the main lifting point according to the following condition of the lifting point, and the main control computer controls the control quantity of the lifting point hydraulic valve according to the current height difference of the following lifting point, so that the position synchronization of each following lifting point and the main lifting point is realized;
Folding and embedding, namely arranging a folding section at the joint of the grid structures at two similar different lifting positions, installing the folding section in an embedding mode after the integral lifting and installation of the grid structures at two areas to be lifted are finished, actually measuring the surface temperature of each component of the grid structures before folding, selecting folding temperature according to design requirements, accurately measuring coordinates of the ports of the components at the folding position by using a total station after folding, adjusting the precision of embedded rod pieces after adding corresponding welding shrinkage residual values, and installing the embedded rod pieces by using an automobile crane or a winch to obtain a large-span space grid steel roof structure;
Unloading, namely unloading a large-span space grid steel roof structure by adopting a main control computer to control an integral descent technology, unloading by using a lifting oil cylinder step by step load reduction mode, synchronously operating by a unified command, and unloading step by step according to 10%, 30%, 50%, 70%, 90% and 100%;
Step six, construction monitoring, namely setting an observation point on the lower chord ball of the net rack, attaching a reflection measurement patch according to the position of the selected observation point, observing and recording observation data on the position of a lifting point before lifting, observing and recording the observation point in the lifting process and lifting in place of the net rack structure, feeding back the observation data to related technicians in time, and stopping lifting and correspondingly adjusting immediately if abnormality occurs.
2. The construction process of the large-span space grid steel roof structure according to claim 1, wherein the step of assembling the grid floor in the step one comprises the following steps:
firstly, scribing a roof floor and erecting an assembly jig;
Secondly, positioning a lower chord welding ball of the net rack;
thirdly, installing a net rack lower chord member;
fourthly, positioning a net rack upper chord welding ball and installing a web member;
fifthly, installing upper chord members of the net rack;
sixth, checking the small spelling unit;
And seventhly, welding the rod piece and detecting a welding line.
3. The construction process of a large span space grid steel roof structure according to claim 1, wherein the four support systems in the second step comprise:
the method comprises the steps that firstly, a column top lifting frame is additionally arranged on a column top, a bracket is welded on the column top, and temporary rod pieces and short pipes of lifting nodes are designed for lifting;
The second type is that the ball joint triangular lattice supports a lifting frame, and a lifting appliance is welded on an original joint ball;
Thirdly, supporting a lifting frame by a cast steel node lattice, and welding a lifting appliance on the cast steel node of the original structure net frame;
and fourthly, supporting the lifting frame by the ball joint four-sided lattice, and welding the lifting tool on the original structural ball.
4. A construction process of a large span space grid steel roof structure according to claim 3, wherein the construction mode of the sling comprises:
Mode one: when the type of the lifting oil cylinder is 100t, the lifting ball specification WSR4516 is over, and a single lug plate is welded to the ball joint;
Mode two: when the lifting oil cylinder model adopts 200t, lifting ball specification WSR5522 is above, adopts the binaural board to weld on the ball node, and trades the ball when the original design ball node does not satisfy the requirement, and the otic placode adopts 25mm thick steel sheet equipment.
5. A construction process of a large span space grid steel roof structure according to claim 3, wherein the second, third and fourth types are all directly dropped on the concrete floor, and the foundation adopts a conversion steel beam with double-spliced HM588 x 300, which can transmit lifting load to the concrete frame beam and column, and the concrete beam is provided with embedded parts in advance.
6. The construction process of the large-span space grid steel roof structure according to claim 1, wherein in the third step, an oil pressure sensor is installed on each lifting oil cylinder of the lifting point, a main control computer monitors the load change condition of each lifting point through an on-site real-time network of the oil pressure sensor, and if the load of the lifting point has abnormal abrupt change, the main control computer automatically closes the lifting action of the lifting point and gives an alarm.
7. The construction process of the large-span space grid steel roof structure according to claim 1, wherein in the third step, a position sensor is installed on each lifting oil cylinder of each lifting point, the position sensor monitors the position condition of the lifting oil cylinder and the tightness condition of an upper anchor and a lower anchor in real time, a main control computer can acquire the current state of all the lifting oil cylinders through a field real-time network, and according to the current state of the lifting oil cylinders, the main control computer can determine the next action of the lifting oil cylinders according to the control requirement of a comprehensive user.
8. A large span space grid steel roof structure characterized by being prepared by the construction process of the large span space grid steel roof structure as set forth in claim 1.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09273225A (en) * | 1996-04-08 | 1997-10-21 | Tomoe Corp | Structure construction method of large span frame in large space truss structure |
| CN113738124A (en) * | 2021-10-14 | 2021-12-03 | 中铁六局集团有限公司 | Lifting construction method for large-span steel structure net rack |
| CN114086669A (en) * | 2021-11-30 | 2022-02-25 | 中国五冶集团有限公司 | Large-scale space special-shaped curved surface steel net rack modular rapid construction method |
| CN216190567U (en) * | 2021-10-15 | 2022-04-05 | 中国建筑第二工程局有限公司 | Assembled hoisting frame for hoisting construction of dome steel structure reticulated shell |
| CN114439249A (en) * | 2022-04-07 | 2022-05-06 | 中铁建工集团有限公司 | Construction method for lifting large-span triangular truss through air swivel |
| CN116623964A (en) * | 2023-07-25 | 2023-08-22 | 北京城建集团有限责任公司 | Reverse construction method of large-span variable-curvature roof |
| CN116657922A (en) * | 2023-05-15 | 2023-08-29 | 江苏恒久钢构股份有限公司 | Assembly construction process for steel structure of hangar |
| CN117403896A (en) * | 2023-09-13 | 2024-01-16 | 中国建筑第八工程局有限公司 | Steel pipe column top common beam double-hanging-point lifting bracket and construction method thereof |
| CN117449209A (en) * | 2023-12-01 | 2024-01-26 | 中交一公局集团有限公司 | Bridge steel structure installation construction folding method |
| CN117569586A (en) * | 2023-11-10 | 2024-02-20 | 中建三局集团有限公司 | Construction method for irregular multi-curve triangular pyramid welding ball net frame |
| CN117627159A (en) * | 2023-11-28 | 2024-03-01 | 浙江东南网架股份有限公司 | Construction method of laminated large-span grid structure |
| CN117868493A (en) * | 2024-01-29 | 2024-04-12 | 中建八局华中建设有限公司 | Floor steel beam assembly floor jig frame type grid lifting method and lifting system |
-
2024
- 2024-05-07 CN CN202410550788.7A patent/CN118241797A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09273225A (en) * | 1996-04-08 | 1997-10-21 | Tomoe Corp | Structure construction method of large span frame in large space truss structure |
| CN113738124A (en) * | 2021-10-14 | 2021-12-03 | 中铁六局集团有限公司 | Lifting construction method for large-span steel structure net rack |
| CN216190567U (en) * | 2021-10-15 | 2022-04-05 | 中国建筑第二工程局有限公司 | Assembled hoisting frame for hoisting construction of dome steel structure reticulated shell |
| CN114086669A (en) * | 2021-11-30 | 2022-02-25 | 中国五冶集团有限公司 | Large-scale space special-shaped curved surface steel net rack modular rapid construction method |
| CN114439249A (en) * | 2022-04-07 | 2022-05-06 | 中铁建工集团有限公司 | Construction method for lifting large-span triangular truss through air swivel |
| CN116657922A (en) * | 2023-05-15 | 2023-08-29 | 江苏恒久钢构股份有限公司 | Assembly construction process for steel structure of hangar |
| CN116623964A (en) * | 2023-07-25 | 2023-08-22 | 北京城建集团有限责任公司 | Reverse construction method of large-span variable-curvature roof |
| CN117403896A (en) * | 2023-09-13 | 2024-01-16 | 中国建筑第八工程局有限公司 | Steel pipe column top common beam double-hanging-point lifting bracket and construction method thereof |
| CN117569586A (en) * | 2023-11-10 | 2024-02-20 | 中建三局集团有限公司 | Construction method for irregular multi-curve triangular pyramid welding ball net frame |
| CN117627159A (en) * | 2023-11-28 | 2024-03-01 | 浙江东南网架股份有限公司 | Construction method of laminated large-span grid structure |
| CN117449209A (en) * | 2023-12-01 | 2024-01-26 | 中交一公局集团有限公司 | Bridge steel structure installation construction folding method |
| CN117868493A (en) * | 2024-01-29 | 2024-04-12 | 中建八局华中建设有限公司 | Floor steel beam assembly floor jig frame type grid lifting method and lifting system |
Non-Patent Citations (2)
| Title |
|---|
| 卞永明: "大型构件液压同步提升技术", 30 April 2015, 上海：上海科学技术出版社, pages: 253 - 254 * |
| 洪国松;陈水祥;黄利顺;邱小军;: "高位大悬挑大型屋盖整体提升施工技术", 建筑技术, no. 11, 15 November 2011 (2011-11-15), pages 984 - 988 * |
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