CN108678398B - Pre-assembly method for steel structure truss of reinforced layer of super high-rise building - Google Patents
Pre-assembly method for steel structure truss of reinforced layer of super high-rise building Download PDFInfo
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- CN108678398B CN108678398B CN201810792200.3A CN201810792200A CN108678398B CN 108678398 B CN108678398 B CN 108678398B CN 201810792200 A CN201810792200 A CN 201810792200A CN 108678398 B CN108678398 B CN 108678398B
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Abstract
The invention discloses a method for pre-assembling a steel structure truss of a super high-rise building reinforcing layer, which comprises the following steps: 1) building a pre-assembled platform on the ground in a factory; 2) the reinforced layer truss is divided into three parts according to the structural surface: the inner ring truss part, the outer cantilever arm truss part and the outer ring truss part of the core barrel are divided into a plurality of members by utilizing a BIM technology; 3) pre-assembling an inner ring truss part of the core barrel; 4) pre-assembling truss parts of cantilever arms outside the core cylinder; 5) the outer ring truss is partially pre-assembled. The invention adopts the scheme of splicing into a whole, so that the pre-splicing is more convenient, the accuracy and the reliability are higher, and the splicing efficiency can be effectively improved; and then make the construction of building the truss enhancement layer more convenient, can reduce construction cost.
Description
Technical Field
The invention relates to the field of building construction supplies, in particular to a pre-assembly method of a steel structure truss of a super high-rise building reinforcing layer.
Background
With the vigorous development of steel structure buildings in China, super high-rise buildings are gradually developed towards function diversification and structure complication, and more high-rise buildings need lateral force resisting structure systems such as an outer frame, a core barrel and a reinforced layer outrigger truss to meet the structural design requirements. The reinforcing layer is arranged in the high-rise building, so that the requirement of the plane function of the building can be met, and the requirements of the strength, stability, displacement and ductility of the structure can be met. Wherein, the outer frame and the core tube are connected by the cantilever structure, the structural integrity is enhanced, the space integral function is fully exerted, and the integral lateral stiffness of the structure is further enhanced. Meanwhile, with the gradual increase of the building height, the reinforced layer structure also tends to be developed by the characteristics of complicated nodes, diversified forms and large-scale members.
The super high-rise building reinforcing layer has the characteristics of complex structure, special shape, large size, high quality requirement, more components, large size and large welding amount of thick steel plates. When the entity is pre-assembled, the reinforcing layer structure usually has large size, large workload, short construction period, no assembly on site, and the components are required to leave the factory according to the schedule. The whole size of enhancement layer is big, assembles in advance and need occupy great place, and the place is limited in the processing factory usually, can't provide the place that large-scale truss was wholly assembled, can only select to assemble in advance in open-air place. However, a pre-assembled field is specially prepared, a special pre-assembled jig frame is additionally arranged, and an open field is usually lack of large-tonnage travelling equipment. Due to the limitation of various internal and external factors, the workload is increased, the processing cost is increased, the pressure for ensuring the quality and the progress is increased, and adverse effects are caused to the pre-assembly of the outrigger truss of the reinforced layer of the super high-rise building.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the problems of troublesome construction, large workload, inconvenient pre-assembly, low construction efficiency, low accuracy, poor reliability and high construction cost of the high-rise building truss reinforcing layer, and provides a pre-assembly method of a steel structure truss of the super-high-rise building reinforcing layer, which is more convenient in pre-assembly, higher in accuracy and reliability and can effectively improve the assembly efficiency; and then make the construction of building the truss enhancement layer more convenient, can reduce construction cost.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows: a pre-assembly method for a steel structure truss of a super high-rise building reinforcing layer is characterized by comprising the following steps: the method comprises the following steps:
1) the method comprises the following steps of (1) building a pre-assembly platform on the ground in a factory: the pre-assembled platform comprises a plurality of first H-shaped steels and a platform plate, wherein the first H-shaped steels are parallel to each other, upper flange plates of all the first H-shaped steels are positioned on the same horizontal plane, and the distance between every two adjacent first H-shaped steels is 0.5-1 m; the platform plate is laid on the upper flange plate of the first H-shaped steel and fixedly connected with the upper flange plate of the first H-shaped steel, and the length direction of the platform plate is vertical to that of the first H-shaped steel; the platform plate is formed by welding a plurality of steel plates;
2) the reinforced layer truss is divided into three parts according to the structural surface: the inner ring truss part, the outer cantilever arm truss part and the outer ring truss part of the core barrel are divided into a plurality of members by utilizing a BIM technology;
3) pre-assembling an inner ring truss part of the core barrel:
A. drawing a partial sample line of the inner ring truss of the core barrel on the platform plate according to the pre-assembly scheme, wherein the sample line comprises an axis and a marking line corresponding to the inner ring truss of the core barrel, and a projection line and a lofting point of the inner ring truss of the core barrel on the platform plate are marked;
B. laying a group of corner post supporting frames on the platform plate respectively at positions corresponding to the corner posts, wherein the corner post supporting frames comprise three second H-shaped steels distributed along the width direction of the platform plate, the length direction of the second H-shaped steels is consistent with that of the platform plate, and the second H-shaped steels are detachably connected with the platform plate; a first concave template is vertically arranged on the upper flange plate of the second H-shaped steel, and the plane of the first concave template passes through the central line of the upper flange plate of the second H-shaped steel and is detachably connected with the second H-shaped steel; the first concave template is provided with a positioning groove which penetrates through the upper side of the first concave template, and the pre-assembled connecting side surface of the corner post can be positioned on the vertical surface through the positioning groove; an inner truss support frame is arranged between the two groups of corner post support frames, the inner truss support frame comprises at least three third H-shaped steels distributed along the length direction of the platform plate, and the length direction of the third H-shaped steels is consistent with the width direction of the platform plate and is detachably connected with the platform plate;
C. respectively placing the corner posts of the core tube on the first concave templates of the two groups of corner post supporting frames, and enabling the two corner posts to face the side connected with the truss; the core tube corner post is divided into an upper post and a lower post, the position of the core tube corner post is adjusted to enable the lofting point on the core tube corner post to coincide with the lofting point on the ground sample line, and then the joint of the upper post and the lower post is temporarily reinforced; then pre-assembling box-type corbels on the two corner columns, adjusting the box-type corbels to be overlapped with the projection line on the platform plate, and then temporarily fixing the box-type corbels;
D. hoisting a lower-layer inner truss plate onto a truss support frame through a crane, wherein the lower-layer inner truss plate comprises an upper chord beam lower plate, a lower chord beam lower plate and a diagonal web member lower plate; in the hoisting process, sequentially hoisting the upper chord beam lower plate, the lower chord beam lower plate and the diagonal web member lower plate, adjusting to be superposed with a projection line on the platform plate, and temporarily fixing;
E. drawing positioning lines of the truss inner column, the truss inner beam and the truss connecting plate on the lower truss plate, and then sequentially placing the truss inner column, the truss inner beam and the truss connecting plate; hoisting an upper truss plate above the truss inner column, the truss inner beam and the truss connecting plate by a crane, wherein the upper truss plate comprises an upper chord beam plate, a lower chord beam plate and a diagonal web member plate; in the hoisting process, sequentially hoisting an upper plate of the upper chord beam, an upper plate of the lower chord beam and an upper plate of the diagonal web member, adjusting the positions to be qualified, and then temporarily fixing;
F. detecting gaps and levelness among all parts to finish pre-assembly;
G. welding parts according to the members divided by the BIM technology, so that each member forms an independent whole;
H. repeating the steps A-G until the pre-assembly of the inner ring truss part of the whole core barrel is completed;
4) the truss part of the cantilever arm outside the core cylinder is pre-assembled:
A. dismantling the truss support frames and one group of corner post support frames on the platform plate, and simultaneously wiping off the ground sample lines, the projection lines and the lofting points on the platform plate;
B. drawing a core tube outer cantilever arm part sample line on the platform plate based on the remaining group of corner post support frames, and marking a projection line and a sample placing point of the core tube outer cantilever arm part on the platform plate;
C. a group of outer frame column support frames are arranged on the platform plate corresponding to the positions of the outer frame columns, each outer frame column support frame comprises at least three fourth H-shaped steels distributed along the width direction of the platform plate, the length direction of each fourth H-shaped steel is consistent with the length direction of the platform plate, and the fourth H-shaped steel is detachably connected with the platform plate; a second concave template is arranged on the upper flange plate of the fourth H-shaped steel, and the plane of the second concave template passes through the central line of the upper flange plate of the fourth H-shaped steel and is detachably connected with the fourth H-shaped steel; an overhanging boom truss support frame is arranged between the corner column support frame and the outer frame column support frame and corresponds to the positions of the upper chord beam, the lower chord beam and the diagonal web members; the cantilever boom truss support frame comprises at least two fifth H-shaped steels distributed along the length direction of the platform plate, and the length direction of the fifth H-shaped steel is consistent with the width direction of the platform plate;
D. placing the corner post and the outer frame post into the corresponding concave template, enabling the side, where the cantilever boom truss is installed, of the corner post and the outer frame post to be opposite, pre-assembling a box-type corbel on the corner post and the outer frame post, adjusting the box-type corbel to be overlapped with a projection line on the platform plate, and temporarily fixing the box-type corbel;
E. hoisting a lower-layer cantilever truss plate onto a cantilever support frame through a crane, wherein the lower-layer cantilever truss plate comprises an upper chord beam lower plate, a lower chord beam lower plate and a diagonal web beam lower plate; in the hoisting process, sequentially hoisting the upper chord beam lower plate, the lower chord beam lower plate and the diagonal web member lower plate, adjusting to coincide with a projection line on the platform plate, and temporarily fixing; then placing an extending arm connecting plate on the truss plate of the extending arm outside the lower layer; hoisting the truss plates of the upper outer cantilever arms to the positions above the cantilever connecting plates through a crane, wherein the truss plates of the upper outer cantilever arms comprise upper plate plates of the upper chord beams, upper plate plates of the lower chord beams and upper plate plates of the diagonal web girders, and then temporarily fixing after adjusting the positions to be qualified;
F. detecting gaps and levelness among all parts to finish pre-assembly;
G. welding parts according to the members divided by the BIM technology, so that each member forms an independent whole;
H. repeating the steps A-G until all the core cylinder outer cantilever arm parts are pre-assembled;
5) pre-assembling an outer ring truss part:
A. dismantling the support frame of the outer cantilever arm and the support frame of the corner post on the platform plate, and simultaneously wiping off the ground sample line, the projection line and the lofting point on the platform plate;
B. adjusting the position of an outer frame column support frame on the platform plate, drawing a partial sample line of the outer ring truss on the platform plate on the basis of the outer frame column support frame, and marking a projection line and a sample placement point of the partial outer ring truss on the platform plate;
C. a group of outer frame column supporting frames are arranged on the platform plate corresponding to the position of the other outer frame column; an outer ring truss unit support frame is arranged between the two groups of outer frame column support frames; the outer ring truss unit supporting frame comprises at least two sixth H-shaped steels distributed along the length direction of the platform plate, and the length direction of the sixth H-shaped steels is consistent with the width direction of the platform plate and is detachably connected with the platform plate;
D. placing the other outer frame column into the corresponding second concave template, enabling the two outer frame columns to face to one side connected with the outer ring truss, pre-assembling box-type corbels on the two outer frame columns, and temporarily fixing the box-type corbels;
E. hoisting a lower-layer outer ring truss unit plate onto an outer ring truss unit support frame through a crane, wherein the lower-layer outer ring truss unit plate comprises an upper beam lower plate, a lower beam lower plate and an X-shaped inclined web beam lower plate; in the hoisting process, sequentially hoisting an upper beam lower plate, a lower beam lower plate and an X-shaped diagonal web girder lower plate, then adjusting to coincide with a projection line on the platform plate, and then temporarily fixing; then, placing a connecting plate on the lower outer ring truss unit plate; hoisting an upper outer ring truss unit plate above the boom connecting plate by a crane, wherein the upper outer ring truss unit plate comprises an upper beam upper plate, a lower beam upper plate and an X-shaped oblique web girder upper plate, and then temporarily fixing after adjusting the position to be qualified;
F. detecting gaps and levelness among all parts to finish pre-assembly;
G. welding parts according to the members divided by the BIM technology, so that each member forms an independent whole;
H. and repeating the steps A-G until all the core tube outer ring truss parts are pre-assembled.
Furthermore, in the pre-assembling process of the inner ring truss part, the outer cantilever arm truss part and the outer ring truss part of the core barrel, when the steps A-G are repeated, corresponding concave templates are required to be replaced according to the placing state of the corner post and/or the outer frame post so as to ensure that the corner post and/or the outer frame post and the inner ring truss or the outer cantilever arm truss or the outer ring truss of the core barrel are positioned on the same horizontal plane.
Further, in the process of placing the corner columns and the outer frame columns, the positions of the steel columns are checked by using a level and a hanging hammer according to the lofting points.
Furthermore, in the process of detecting the gaps and levelness among all parts, the steel tape and the level gauge are used for detection.
Furthermore, in the detection process, the parts which are not matched with the requirements are marked and recorded to form a pre-assembled in-situ parameter questionnaire.
Compared with the prior art, the invention has the following advantages:
1. aiming at the characteristic of complex structure of the component, the idea of 'manufacturing and splicing into a whole' is adopted, welding processing links of partial components are integrated into the pre-splicing process, the workload is reduced, the cost is reduced, and energy-saving green processing is realized.
2. Aiming at the characteristics of large component size, complex structure and similar structure composition in the reinforcing layer, a small-batch assembly type production process flow is formulated, the components are split according to classes and processed in a classification way, the components of the same type are processed in a unified way, and finally the components are assembled and processed into complete components; meanwhile, the method can reduce the process intersection, increase the utilization rate of fields, reduce the cost and conveniently control the processing quality of the components in a grading way.
3. The fixed assembly platform in the factory and the support frames in bulk are combined for use in an in-factory horizontal assembly mode, so that component assembly work and pre-assembly work can be alternately carried out in the same field, and the workload is reduced in a relatively economic mode; the method is suitable for continuously and quickly pre-assembling the reinforcing layer truss with large span, large volume and short construction period in a processing plant without a special pre-assembling field.
4. Aiming at the characteristics of limited site and urgent processing time in a processing plant, an inner ring truss part of a core cylinder, an outer cantilever truss part of the core cylinder and an outer ring truss part are respectively divided into a plurality of pre-assembled components, and continuous matching pre-assembly is carried out according to the factory requirements, so that the site occupation is reduced, and the high-altitude operation is reduced.
5. For the components which are welded after being pre-assembled, the components are checked after being pre-assembled and welded by using the in-situ parameter review table recorded during pre-assembly, and the processing quality of the components is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a pre-assembled platform.
Fig. 2 is a schematic structural diagram of a core tube inner ring truss pre-assembled jig frame.
Fig. 3 is a side view of fig. 2.
Fig. 4 is a schematic structural view of an outrigger truss pre-assembled jig.
Fig. 5 is a structural schematic diagram of an outer ring truss pre-assembled jig frame.
Fig. 6 is a schematic diagram of a division structure of the truss part of the inner ring of the core barrel.
Fig. 7 is a schematic diagram of a division structure of a truss part of the cantilever arm outside the core barrel.
Fig. 8 is a schematic view of a division structure of the outer ring truss portion.
In the figure: 1-first H shaped steel, 2-platform board, 3-second H shaped steel, 4-third H shaped steel, 5-first spill template, 6-fourth H shaped steel, 7-fifth H shaped steel, 8-second spill template, 9-sixth H shaped steel.
In fig. 6 to 8, the dashed boxes are schematic diagrams of the respective members divided.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
Example (b): referring to fig. 1 to 8, a method for pre-assembling a steel structure truss of a super high-rise building reinforcing layer comprises the following steps:
1) the method comprises the following steps of (1) building a pre-assembly platform on the ground in a factory: the pre-assembled platform comprises a plurality of first H-shaped steels 1 and a platform plate 2, the first H-shaped steels 1 are parallel to each other, upper flange plates of all the first H-shaped steels 1 are positioned on the same horizontal plane, and the distance between every two adjacent first H-shaped steels 1 is 0.5-1 m; the platform plate 2 is laid on the upper flange plate of the first H-shaped steel 1 and fixedly connected with the upper flange plate of the first H-shaped steel 1, and the length direction of the platform plate 2 is perpendicular to the length direction of the first H-shaped steel 1; wherein, the platform plate 2 is formed by welding a plurality of steel plates. In the assembling process, the first H-shaped steel 1 is placed at a higher position, the height of the upper surface of the first H-shaped steel 1 is ensured to be consistent by using a level meter, the height of the upper surface of the first H-shaped steel 1 is detected by using the level meter when the first H-shaped steel 1 is placed, a detection point is arranged at intervals of 1.5m in the length direction, and when the heights are inconsistent, the height is adjusted by using a gasket; and meanwhile, the flatness of the whole surface of all the paved first H-shaped steel 1 is checked by using a wire drawing method, and the surfaces of the paved first H-shaped steel 1 are ensured to be on the same horizontal plane. Wherein, the platform plate 2 is formed by tiling a steel plate with the thickness of 30 mm; when the steel plates are laid, the length direction of the steel plates is perpendicular to the length direction of the first H-shaped steel 1, a gap of 5mm is reserved between every two adjacent steel plates, and the steel plates are connected with each other in an electric welding mode; simultaneously, adopt spirit level and the method of acting as go-between to make level, guarantee that whole work platform roughness is in 3mm, every steel sheet evenly sets up 9 monitoring points, uses the spirit level to detect its upper surface elevation, repairs the department that does not conform to the requirement.
2) The reinforced layer truss is divided into three parts according to the structural surface: the inner ring truss part, the outer cantilever arm truss part and the outer ring truss part of the core barrel are divided into a plurality of members by utilizing a BIM technology; in the specific implementation process, each part is divided into a plurality of components along one direction by using the BIM technology.
3) Pre-assembling an inner ring truss part of the core barrel:
A. according to the pre-assembly scheme, drawing partial sample lines of the core cylinder inner ring truss on the platform plate 2, wherein the sample lines comprise the axis and the marking line corresponding to the core cylinder inner ring truss, and marking the projection line and the lofting point of the core cylinder inner ring truss on the platform plate 2.
B. A group of corner post supporting frames are respectively laid on the platform plate 2 at positions corresponding to the corner posts, each corner post supporting frame comprises at least three second H-shaped steels 3 distributed along the width direction of the platform plate 2, the length direction of each second H-shaped steel 3 is consistent with that of the platform plate 2, and the second H-shaped steels 3 are detachably connected with the platform plate 2; a first concave template 5 is vertically arranged on the upper flange plate of the second H-shaped steel 3, and the plane of the first concave template 5 passes through the central line of the upper flange plate of the second H-shaped steel 3 and is detachably connected with the second H-shaped steel 3; the first concave template 5 is provided with a positioning groove which penetrates through the upper side of the first concave template, and the pre-assembled connecting side surface of the corner post can be positioned on a vertical surface through the positioning groove; truss support frame in being equipped with between two sets of corner post support frames, interior truss support frame includes three at least third H shaped steel 4 that distribute along 2 length direction of landing slab, and the length direction of this third H shaped steel 4 is unanimous with the width direction of landing slab 2 to can dismantle with landing slab 2 and be connected.
C. Respectively placing the corner posts of the core tube on the first concave templates 5 of the two groups of corner post supporting frames, and enabling the two corner posts to be opposite to one side connected with the truss; the core tube corner post is divided into an upper post and a lower post, the position of the core tube corner post is adjusted to enable the lofting point on the core tube corner post to coincide with the lofting point on the ground sample line, and then the joint of the upper post and the lower post is temporarily reinforced; then, box-type corbels are pre-assembled on the two corner columns, adjusted to be coincident with the projection lines on the platform plate 2, and then temporarily fixed.
D. Hoisting a lower-layer inner truss plate onto a truss support frame through a crane, wherein the lower-layer inner truss plate comprises an upper chord beam lower plate, a lower chord beam lower plate and a diagonal web member lower plate; in the hoisting process, the upper chord beam lower plate, the lower chord beam lower plate and the diagonal web member lower plate are sequentially hoisted, then adjusted to be coincident with the projection line on the platform plate 2, and then temporarily fixed.
E. Drawing positioning lines of the truss inner column, the truss inner beam and the truss connecting plate on the lower truss plate, and then sequentially placing the truss inner column, the truss inner beam and the truss connecting plate; hoisting an upper truss plate above the truss inner column, the truss inner beam and the truss connecting plate by a crane, wherein the upper truss plate comprises an upper chord beam plate, a lower chord beam plate and a diagonal web member plate; in the hoisting process, the upper plate of the upper chord girder, the upper plate of the lower chord girder and the upper plate of the diagonal web member are sequentially hoisted, and then the positions are adjusted to be qualified and then temporarily fixed.
F. And detecting gaps and levelness among all parts to finish pre-assembly.
G. Parts are welded to members divided by the BIM technique, and the members are formed as an independent whole.
H. And repeating the steps A to G until the pre-assembly of the inner ring truss part of the whole core barrel is completed. In the specific implementation process, because the inner trusses are required to be installed on the two adjacent sides of each corner post, in the process, only one corner post needs to be detached, then the other corner post is moved to the corner post support frame with the corner post removed, and is rotated to the other installation side, and then the corresponding first concave template 5 is replaced and fixed; hoisting the corner post adjacent to the side of the corner post for installation and positioning; then repeating the steps C-H; therefore, the pre-assembly time can be further saved, and the pre-assembly efficiency is improved.
4) The truss part of the cantilever arm outside the core cylinder is pre-assembled:
A. and dismantling the truss support frames and one group of corner post support frames on the platform plate 2, and wiping off the ground sample lines, the projection lines and the lofting points on the platform plate 2.
B. And drawing a core tube overhanging arm part sample line on the platform plate 2 based on the rest group of corner post support frames, and marking a projection line and a lofting point of the core tube overhanging arm part on the platform plate 2.
C. A group of outer frame column support frames are arranged on the platform plate 2 corresponding to the positions of the outer frame columns, each outer frame column support frame comprises at least three fourth H-shaped steels 6 distributed along the width direction of the platform plate 2, the length direction of each fourth H-shaped steel 6 is consistent with the length direction of the platform plate 2, and the fourth H-shaped steel 6 is detachably connected with the platform plate 2; a second concave template 8 is arranged on the upper flange plate of the fourth H-shaped steel 6, the plane of the second concave template 8 passes through the central line of the upper flange plate of the fourth H-shaped steel 6, and the second concave template is detachably connected with the fourth H-shaped steel 6; and cantilever truss support frames are arranged between the corner column support frames and the outer frame column support frames and correspond to the upper chord beams, the lower chord beams and the inclined web members. The cantilever boom truss support frame comprises at least two fifth H-shaped steels 7 distributed along the length direction of the platform plate 2, and the length direction of the fifth H-shaped steels 7 is consistent with the width direction of the platform plate 2;
D. putting the corner post and the outer frame post into the corresponding concave template, enabling one sides of the corner post and the outer frame post, which are provided with the cantilever arm trusses, to face each other, pre-assembling a box-type bracket on the corner post and the outer frame post, adjusting the box-type bracket to be superposed with a projection line on the platform plate 2, and temporarily fixing the box-type bracket.
E. Hoisting a lower-layer cantilever truss plate onto a cantilever support frame through a crane, wherein the lower-layer cantilever truss plate comprises an upper chord beam lower plate, a lower chord beam lower plate and a diagonal web beam lower plate; in the hoisting process, sequentially hoisting the upper chord beam lower plate, the lower chord beam lower plate and the diagonal web member lower plate, adjusting to coincide with a projection line on the platform plate 2, and temporarily fixing; then placing an extending arm connecting plate on the truss plate of the extending arm outside the lower layer; and hoisting the truss plates of the upper outer cantilever arms to the upper parts of the cantilever arm connecting plates through a travelling crane, wherein the truss plates of the upper outer cantilever arms comprise an upper plate of the upper chord beam, an upper plate of the lower chord beam and an upper plate of the diagonal web girder, and then temporarily fixing after adjusting the positions to be qualified.
F. And detecting gaps and levelness among all parts to finish pre-assembly.
G. Parts are welded to members divided by the BIM technique, and the members are formed as an independent whole.
H. And repeating the steps A-G until all the core cylinder outer cantilever arm parts are pre-assembled. In the actual construction process, the structures, the connection modes and the directions of the cantilever arms at all the positions are consistent, so that the steps D-H can be repeated, the pre-assembly time can be further saved, and the pre-assembly efficiency is improved.
5) Pre-assembling an outer ring truss part:
A. and dismantling the support frame of the outer cantilever arm and the support frame of the corner post on the platform plate 2, and simultaneously wiping off the ground sample line, the projection line and the lofting point on the platform plate 2.
B. The position of the outer frame column support frame on the platform plate 2 is adjusted, then the outer ring truss part sample line is drawn on the platform plate 2 on the basis of the outer frame column support frame, and the projection line and the lofting point of the outer ring truss part on the platform plate 2 are marked.
C. A group of outer frame column supporting frames are arranged on the platform plate 2 corresponding to the position of the other outer frame column; a ring truss unit support frame is arranged between the two groups of outer frame column support frames; the outer ring truss unit supporting frame comprises at least two sixth H-shaped steels 9 distributed along the length direction of the platform plate 2, and the length direction of the sixth H-shaped steels 9 is consistent with the width direction of the platform plate 2 and is detachably connected with the platform plate 2.
D. And putting the other outer frame column into the corresponding second concave template 8, enabling the two outer frame columns to face one side connected with the outer ring truss, pre-assembling box-type corbels on the two outer frame columns, and temporarily fixing the box-type corbels.
E. Hoisting a lower-layer outer ring truss unit plate onto an outer ring truss unit support frame through a crane, wherein the lower-layer outer ring truss unit plate comprises an upper beam lower plate, a lower beam lower plate and an X-shaped inclined web beam lower plate; in the hoisting process, sequentially hoisting an upper beam lower plate, a lower beam lower plate and an X-shaped diagonal web girder lower plate, then adjusting to coincide with a projection line on the platform plate 2, and then temporarily fixing; then, placing a connecting plate on the lower outer ring truss unit plate; and hoisting the upper outer ring truss unit plate to the upper part of the boom connecting plate by a travelling crane, wherein the upper outer ring truss unit plate comprises an upper beam upper plate, a lower beam upper plate and an X-shaped oblique web beam upper plate, and then temporarily fixing after adjusting the position to be qualified.
F. And detecting gaps and levelness among all parts to finish pre-assembly.
G. Parts are welded to members divided by the BIM technique, and the members are formed as an independent whole.
H. And repeating the steps A-G until all the core tube outer ring truss parts are pre-assembled.
During the pre-assembling process of the inner ring truss part, the outer cantilever arm truss part and the outer ring truss part of the core barrel, corresponding concave templates are required to be replaced according to the placing state of the corner post and/or the outer frame post when the steps A-G are repeated, so that the corner post and/or the outer frame post and the inner ring truss or the outer cantilever arm truss or the outer ring truss of the core barrel are ensured to be positioned on the same horizontal plane. And in the process of placing the corner columns and the outer frame columns, according to the lofting points, the positions of the steel columns are checked by using a level gauge and a hanging hammer.
In the detection process after each part is pre-assembled, in the process of detecting the gaps and levelness among all parts, the detection is carried out through a steel tape and a level gauge. Marking and recording the parts which are not matched with the requirements to form a pre-assembly in-situ parameter re-lookup table; therefore, for the pre-assembled and then welded component, the pre-assembled and then welded component is checked by using the in-situ parameter review table recorded during pre-assembly, and the processing quality of the component is guaranteed.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.
Claims (5)
1. A pre-assembly method for a steel structure truss of a super high-rise building reinforcing layer is characterized by comprising the following steps: the method comprises the following steps:
1) the method comprises the following steps of (1) building a pre-assembly platform on the ground in a factory: the pre-assembled platform comprises a plurality of first H-shaped steels and a platform plate, wherein the first H-shaped steels are parallel to each other, upper flange plates of all the first H-shaped steels are positioned on the same horizontal plane, and the distance between every two adjacent first H-shaped steels is 0.5-1 m; the platform plate is laid on the upper flange plate of the first H-shaped steel and fixedly connected with the upper flange plate of the first H-shaped steel, and the length direction of the platform plate is vertical to that of the first H-shaped steel; the platform plate is formed by welding a plurality of steel plates;
2) the reinforced layer truss is divided into three parts according to the structural surface: the inner ring truss part, the outer cantilever arm truss part and the outer ring truss part of the core barrel are divided into a plurality of members by utilizing a BIM technology;
3) pre-assembling an inner ring truss part of the core barrel:
A. drawing a partial sample line of the inner ring truss of the core barrel on the platform plate according to the pre-assembly scheme, wherein the sample line comprises an axis and a marking line corresponding to the inner ring truss of the core barrel, and a projection line and a lofting point of the inner ring truss of the core barrel on the platform plate are marked;
B. laying a group of corner post supporting frames on the platform plate respectively at positions corresponding to the corner posts, wherein the corner post supporting frames comprise three second H-shaped steels distributed along the width direction of the platform plate, the length direction of the second H-shaped steels is consistent with that of the platform plate, and the second H-shaped steels are detachably connected with the platform plate; a first concave template is vertically arranged on the upper flange plate of the second H-shaped steel, and the plane of the first concave template passes through the central line of the upper flange plate of the second H-shaped steel and is detachably connected with the second H-shaped steel; the first concave template is provided with a positioning groove which penetrates through the upper side of the first concave template, and the pre-assembled connecting side surface of the corner post can be positioned on the vertical surface through the positioning groove; an inner truss support frame is arranged between the two groups of corner post support frames, the inner truss support frame comprises at least three third H-shaped steels distributed along the length direction of the platform plate, and the length direction of the third H-shaped steels is consistent with the width direction of the platform plate and is detachably connected with the platform plate;
C. respectively placing the corner posts of the core tube on the first concave templates of the two groups of corner post supporting frames, and enabling the two corner posts to face the side connected with the truss; the core tube corner post is divided into an upper post and a lower post, the position of the core tube corner post is adjusted to enable the lofting point on the core tube corner post to coincide with the lofting point on the ground sample line, and then the joint of the upper post and the lower post is temporarily reinforced; then pre-assembling box-type corbels on the two corner columns, adjusting the box-type corbels to be overlapped with the projection line on the platform plate, and then temporarily fixing the box-type corbels;
D. hoisting a lower-layer inner truss plate onto a truss support frame through a crane, wherein the lower-layer inner truss plate comprises an upper chord beam lower plate, a lower chord beam lower plate and a diagonal web member lower plate; in the hoisting process, sequentially hoisting the upper chord beam lower plate, the lower chord beam lower plate and the diagonal web member lower plate, adjusting to be superposed with a projection line on the platform plate, and temporarily fixing;
E. drawing positioning lines of the truss inner column, the truss inner beam and the truss connecting plate on the lower truss plate, and then sequentially placing the truss inner column, the truss inner beam and the truss connecting plate; hoisting an upper truss plate above the truss inner column, the truss inner beam and the truss connecting plate by a crane, wherein the upper truss plate comprises an upper chord beam plate, a lower chord beam plate and a diagonal web member plate; in the hoisting process, sequentially hoisting an upper plate of the upper chord beam, an upper plate of the lower chord beam and an upper plate of the diagonal web member, adjusting the positions to be qualified, and then temporarily fixing;
F. detecting gaps and levelness among all parts to finish pre-assembly;
G. welding parts according to the members divided by the BIM technology, so that each member forms an independent whole;
H. repeating the steps A-G until the pre-assembly of the inner ring truss part of the whole core barrel is completed;
4) the truss part of the cantilever arm outside the core cylinder is pre-assembled:
A. dismantling the truss support frames and one group of corner post support frames on the platform plate, and simultaneously wiping off the ground sample lines, the projection lines and the lofting points on the platform plate;
B. drawing a core tube outer cantilever arm part sample line on the platform plate based on the remaining group of corner post support frames, and marking a projection line and a sample placing point of the core tube outer cantilever arm part on the platform plate;
C. a group of outer frame column support frames are arranged on the platform plate corresponding to the positions of the outer frame columns, each outer frame column support frame comprises at least three fourth H-shaped steels distributed along the width direction of the platform plate, the length direction of each fourth H-shaped steel is consistent with the length direction of the platform plate, and the fourth H-shaped steel is detachably connected with the platform plate; a second concave template is arranged on the upper flange plate of the fourth H-shaped steel, and the plane of the second concave template passes through the central line of the upper flange plate of the fourth H-shaped steel and is detachably connected with the fourth H-shaped steel; an overhanging boom truss support frame is arranged between the corner column support frame and the outer frame column support frame and corresponds to the positions of the upper chord beam, the lower chord beam and the diagonal web members; the cantilever boom truss support frame comprises at least two fifth H-shaped steels distributed along the length direction of the platform plate, and the length direction of the fifth H-shaped steel is consistent with the width direction of the platform plate;
D. placing the corner post and the outer frame post into the corresponding concave template, enabling the side, where the cantilever boom truss is installed, of the corner post and the outer frame post to be opposite, pre-assembling a box-type corbel on the corner post and the outer frame post, adjusting the box-type corbel to be overlapped with a projection line on the platform plate, and temporarily fixing the box-type corbel;
E. hoisting a lower-layer cantilever truss plate onto a cantilever support frame through a crane, wherein the lower-layer cantilever truss plate comprises an upper chord beam lower plate, a lower chord beam lower plate and a diagonal web beam lower plate; in the hoisting process, sequentially hoisting the upper chord beam lower plate, the lower chord beam lower plate and the diagonal web member lower plate, adjusting to coincide with a projection line on the platform plate, and temporarily fixing; then placing an extending arm connecting plate on the truss plate of the extending arm outside the lower layer; hoisting the truss plates of the upper outer cantilever arms to the positions above the cantilever connecting plates through a crane, wherein the truss plates of the upper outer cantilever arms comprise upper plate plates of the upper chord beams, upper plate plates of the lower chord beams and upper plate plates of the diagonal web girders, and then temporarily fixing after adjusting the positions to be qualified;
F. detecting gaps and levelness among all parts to finish pre-assembly;
G. welding parts according to the members divided by the BIM technology, so that each member forms an independent whole;
H. repeating the steps A-G until all the core cylinder outer cantilever arm parts are pre-assembled;
5) pre-assembling an outer ring truss part:
A. dismantling the support frame of the outer cantilever arm and the support frame of the corner post on the platform plate, and simultaneously wiping off the ground sample line, the projection line and the lofting point on the platform plate;
B. adjusting the position of an outer frame column support frame on the platform plate, drawing a partial sample line of the outer ring truss on the platform plate on the basis of the outer frame column support frame, and marking a projection line and a sample placement point of the partial outer ring truss on the platform plate;
C. a group of outer frame column supporting frames are arranged on the platform plate corresponding to the position of the other outer frame column; an outer ring truss unit support frame is arranged between the two groups of outer frame column support frames; the outer ring truss unit supporting frame comprises at least two sixth H-shaped steels distributed along the length direction of the platform plate, and the length direction of the sixth H-shaped steels is consistent with the width direction of the platform plate and is detachably connected with the platform plate;
D. placing the other outer frame column into the corresponding second concave template, enabling the two outer frame columns to face to one side connected with the outer ring truss, pre-assembling box-type corbels on the two outer frame columns, and temporarily fixing the box-type corbels;
E. hoisting a lower-layer outer ring truss unit plate onto an outer ring truss unit support frame through a crane, wherein the lower-layer outer ring truss unit plate comprises an upper beam lower plate, a lower beam lower plate and an X-shaped inclined web beam lower plate; in the hoisting process, sequentially hoisting an upper beam lower plate, a lower beam lower plate and an X-shaped diagonal web girder lower plate, then adjusting to coincide with a projection line on the platform plate, and then temporarily fixing; then, placing a connecting plate on the lower outer ring truss unit plate; hoisting an upper outer ring truss unit plate above the boom connecting plate by a crane, wherein the upper outer ring truss unit plate comprises an upper beam upper plate, a lower beam upper plate and an X-shaped oblique web girder upper plate, and then temporarily fixing after adjusting the position to be qualified;
F. detecting gaps and levelness among all parts to finish pre-assembly;
G. welding parts according to the members divided by the BIM technology, so that each member forms an independent whole;
H. and repeating the steps A-G until all the core tube outer ring truss parts are pre-assembled.
2. The method for pre-assembling the steel structure truss with the reinforced layer for the super high-rise building according to claim 1, is characterized in that: in the pre-assembling process of the inner ring truss part, the outer cantilever arm truss part and the outer ring truss part of the core barrel, when the steps A-G are repeated, corresponding concave templates are required to be replaced according to the placing state of the corner post and/or the outer frame post so as to ensure that the corner post and/or the outer frame post and the inner ring truss or the outer cantilever arm truss or the outer ring truss of the core barrel are positioned on the same horizontal plane.
3. The method for pre-assembling the steel structure truss with the reinforced layer for the super high-rise building according to claim 1, is characterized in that: and in the process of placing the corner columns and the outer frame columns, according to the lofting points, the positions of the steel columns are checked by using a level gauge and a hanging hammer.
4. The method for pre-assembling the steel structure truss with the reinforced layer for the super high-rise building according to claim 1, is characterized in that: in the process of detecting the gaps and levelness among the parts, the steel tape and the gradienter are used for detection.
5. The method for pre-assembling the steel structure truss with the reinforced layer for the super high-rise building according to claim 1, is characterized in that: in the detection process, the parts which are not matched with the requirements are marked and recorded to form a pre-assembled in-situ parameter questionnaire.
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| CN110424746B (en) * | 2019-08-21 | 2021-02-26 | 中冶建工集团有限公司 | Method for installing roof truss and pavement in venue |
| CN111648606A (en) * | 2020-06-10 | 2020-09-11 | 深圳市市政工程总公司 | Construction method for high-altitude cantilever splicing of steel structure |
| CN111927111B (en) * | 2020-09-22 | 2020-12-25 | 上海建工集团股份有限公司 | Construction method of ultrahigh special-shaped outer frame steel structure |
| CN115045560A (en) * | 2022-06-23 | 2022-09-13 | 中建钢构工程有限公司 | Pre-assembly method of special-shaped high-rise steel structure |
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