CN113756502A - Construction method of Z-shaped large-span aluminum alloy frame roof - Google Patents
Construction method of Z-shaped large-span aluminum alloy frame roof Download PDFInfo
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- CN113756502A CN113756502A CN202111159398.XA CN202111159398A CN113756502A CN 113756502 A CN113756502 A CN 113756502A CN 202111159398 A CN202111159398 A CN 202111159398A CN 113756502 A CN113756502 A CN 113756502A
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- aluminum alloy
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- latticed shell
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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
- E04B7/08—Vaulted roofs
- E04B7/10—Shell structures, e.g. of hyperbolic-parabolic shape; Grid-like formations acting as shell structures; Folded structures
- E04B7/105—Grid-like structures
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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
Abstract
The invention relates to a construction method of a Z-shaped large-span aluminum alloy frame roof, which belongs to the field of buildings, the whole roof is sequentially divided into a first area, a third area, a second area, a fifth area and a fourth area from west to east, a reticulated shell of the third area is firstly bulk-assembled, then the reticulated shell of the first area is integrally lifted in place and folded with the reticulated shell of the third area, then a special-shaped beam of the fifth area is installed, then the reticulated shell of the second area is integrally lifted in place and folded with the reticulated shell of the third area and the special-shaped beam of the fifth area, finally the reticulated shell of the fourth area is integrally lifted and folded with the special-shaped beam of the fifth area, and different construction methods are adopted for different areas, so that the installation precision is improved, and the construction period is shortened. In addition, the first area, the third area, the second area and the fourth area are all provided with the reticulated shell and then provided with the tree-shaped support, so that the crossed operation of the aluminum alloy structure and the tree-shaped column installation can be effectively solved, two independent installation procedures are adopted, the construction period is shortened, the installation precision is improved, and the accumulated error of the installation precision is reduced.
Description
Technical Field
The invention belongs to the field of buildings, and particularly relates to a construction method of a Z-shaped large-span aluminum alloy frame roof.
Background
With the development of economy, more and more architectural designers are pursuing the aesthetic appearance of buildings when designing architectural structures. Ribbon-shaped buildings are gradually sought after by designers as a new form of building structure.
For the streamer building with the largest installation elevation of the latticed shell, if the component high-altitude bulk is adopted, the quantity of the components is too large, the workload is large, the field mechanical equipment is difficult to meet the hoisting requirement, and the required high-altitude assembling jig frame is difficult to erect, so that great safety and quality risks exist. The difficulty of construction is large, and the control of safety, quality and construction period of the field installation of the shell structure is not facilitated.
Disclosure of Invention
The invention aims to provide a construction method of a Z-shaped large-span aluminum alloy frame roof, which aims to solve the technical problem.
Therefore, the invention provides a construction method of a Z-shaped large-span aluminum alloy frame roof, the roof comprises a tree-shaped support and a Z-shaped aluminum alloy latticed shell connected to the top of the tree-shaped support, the roof is sequentially divided into a first area, a third area, a second area, a fifth area and a fourth area from west to east, wherein latticed shell component units of the aluminum alloy latticed shell forming the second area are cranked components, and the fifth area comprises a steel column and a special-shaped beam, and the construction method comprises the following steps:
s1, erecting a scaffold on the existing floor slab in the three areas, and arranging an aluminum alloy latticed shell in the three areas in bulk on the scaffold in a high altitude mode;
s2, mounting tree-shaped supports at the bottom of the three-section aluminum alloy latticed shell;
s3, assembling an aluminum alloy latticed shell of the first area on the Bailey truss of the first area, lifting the aluminum alloy latticed shell of the first area to be in place and folding the aluminum alloy latticed shell of the first area and the aluminum alloy latticed shell of the third area;
s4, mounting tree-shaped supports at the bottom of the aluminum alloy latticed shell in the first area;
s5, mounting steel columns and special-shaped beams in the five areas;
s6, assembling the aluminum alloy latticed shell of the second area on the Bailey truss of the second area, lifting the aluminum alloy latticed shell of the second area to be in place, and folding the aluminum alloy latticed shell of the second area, the aluminum alloy latticed shell of the third area and the special-shaped beam of the fifth area;
s7, mounting tree-shaped supports at the bottom of the aluminum alloy latticed shell in the second area;
s8, spraying paint for repairing, and checking and accepting the main structure;
s9, assembling the aluminum alloy latticed shells of the four areas, jacking the aluminum alloy latticed shells of the four areas in position and folding the aluminum alloy latticed shells of the four areas with the special-shaped beams of the five areas;
s10, mounting tree supports at the bottoms of the aluminum alloy latticed shells in the four areas;
and S11, spraying paint for repairing, and checking and accepting the main body structure of the aluminum alloy latticed shell.
Preferably, the installation method of the two-zone aluminum alloy latticed shell comprises the following steps:
s61, erecting a Bailey truss on the ground, assembling an aluminum alloy latticed shell of the plane part of the second area on the Bailey truss, lifting the aluminum alloy latticed shell of the plane part of the second area to a certain height, and suspending lifting;
s62, mounting a layer of aluminum alloy latticed shell of the vertical face part at the end part of the aluminum alloy latticed shell of the plane part of the second area, then lifting the aluminum alloy latticed shell of the plane part of the second area and the aluminum alloy latticed shell of the vertical face part at the same height, and suspending lifting;
s63, mounting a layer of aluminum alloy latticed shell of the vertical face part at the bottom of the aluminum alloy latticed shell of the vertical face part of the second area, lifting the aluminum alloy latticed shell of the plane part of the second area and the aluminum alloy latticed shells of the two vertical face parts at the same height, and suspending lifting;
s64, repeating the steps S62 and S63 until the aluminum alloy latticed shell of the plane part of the second area is folded with the aluminum alloy latticed shell of the third area, and the aluminum alloy latticed shell of the vertical part of the second area is folded with the special-shaped beam of the fifth area.
Preferably, after the tree-shaped supports of the second area are installed, the bailey frames at the bottom of the aluminum alloy latticed shell of the plane part of the second area are removed.
Preferably, when the aluminum alloy latticed shells of the two-area vertical surface part are installed, the bailey frames are fixed with the temporary hoops on the original building through the guy cables, and after the aluminum alloy latticed shells of each layer of vertical surface part are installed, the temporary hoops are detached and moved to the next pause elevation until all the aluminum alloy latticed shells of the two-area vertical surface part are installed.
Preferably, the method for installing the aluminum alloy latticed shell and the tree-shaped support in the first area comprises the following steps:
s31, erecting a bailey truss on the existing floor, and then assembling an aluminum alloy latticed shell of a region on the bailey truss;
s32, lifting the bailey frames and the aluminum alloy latticed shells of the first area to a designed height integrally and folding the bailey frames and the aluminum alloy latticed shells of the third area;
s33, laying a crane operation platform on the existing floor, erecting a truck crane on the crane operation platform, and installing tree-shaped supports by using the truck crane;
s34, mounting a steel frame on the top of the aluminum alloy latticed shell in the first area, and mounting an electric hoist on the steel frame;
s35, fixing the Bailey frames by using a crane, then removing the inner ring Bailey frames which can collide with the tree-shaped supports in the process of lowering, and reserving the outer ring Bailey frames which cannot collide with the tree-shaped supports in the process of directly lowering, so that the inner ring Bailey frames and the outer ring Bailey frames are completely separated;
s36, the inner ring bailey frames are lowered to the existing floor one by one through an electric hoist, and no contact collision between the inner ring bailey frames and the tree-shaped supports is guaranteed during lowering;
s37, integrally lowering the outer ring bailey frames to the existing floor by adopting lifting equipment;
and S39, dismantling the steel frame.
Preferably, a large eye net is laid at the bottom of the bailey truss in the first area, the lifting equipment is arranged on the original structural column, the output end of the lifting equipment is connected with one end of the guy rope, and the large eye net is connected with the other end of the guy rope.
Preferably, after the aluminum alloy latticed shell in one area is lifted to 140mm-160mm, the lifting is suspended and kept still for 4-12 hours, whether the deformation of the rod unit of the aluminum alloy latticed shell is consistent with the construction calculated amount or not is monitored, and formal lifting is started after no abnormity is confirmed.
Preferably, tree-shaped supports are installed by using the truck cranes, when tree-shaped supports of a first area and a third area are installed, the truck cranes are arranged on a truck crane platform of the first area, when tree-shaped supports of a second area are installed, the truck cranes are arranged on a truck crane platform of the second area, and when tree-shaped supports of a fourth area are installed, the truck cranes are arranged on the east side of the fourth area.
Preferably, after the aluminum alloy latticed shells in the four areas are jacked to the designed elevation, temporary movable scaffolds are erected, workers assemble rod pieces of the aluminum alloy latticed shells at the joints of the four areas and the five areas on the temporary movable scaffolds, and finally the aluminum alloy latticed shells in the four areas are folded with the special-shaped beams in the five areas.
Preferably, three district's aluminum alloy reticulated shell below is equipped with the multilayer vestibule, and the scaffold frame is set up at the top of vestibule, assembles the member of the aluminum alloy reticulated shell of seam crossing on three district's scaffold frame, accomplishes and folds the construction.
Compared with the prior art, the invention has the characteristics and beneficial effects that:
(1) the Z-shaped large-span aluminum alloy frame roof has the east-west length of 104.963m, the north-south maximum width of 47.427m and small aluminum alloy structural strength, and can deform or damage a large-span aluminum alloy structure in the lifting or jacking process. Therefore, the scheme of integral lifting or jacking is not suitable, the installation is divided into 5 areas according to the elevation position conditions of the whole structure supporting column and the latticed shell and the peripheral structure, wherein the integral lifting method is adopted in one area and the other area, and the method adopts corbels and structural column hoops for conversion by means of the peripheral structure, so that the control on the deformation value of the aluminum alloy latticed shell structure in the lifting process can be met, and a basis is provided for the folding of the areas in place; three areas are located above the corridor with 5 layers, tree branch supporting columns are arranged below the three-area aluminum alloy structure, the distance is small, the height of the parapet wall of the peripheral roof is lower than the elevation of the three-area aluminum alloy latticed shell, and the area of the three areas is small, so that a lifting or jacking scheme cannot be adopted, the full-corridor frame hand frame erected on the corridor roof is utilized to carry out high-altitude scattered rod pieces, the installation method is simple, hoisting machinery is not needed, and the material transportation is convenient; the four areas adopt an integral jacking installation process, so that the precision of the structure in the assembling process is ensured, the manual assembling error is reduced, the accumulated error is reduced, the construction period can be saved, the damage of human factors to the structure in the assembling process is ensured, and the primary qualification rate of the structure installation is improved. During construction, the whole roof is divided into a first area, a third area, a second area, a fifth area and a fourth area from west to east in sequence, the latticed shell of the third area is firstly bulk-assembled, then the latticed shell of the first area is integrally lifted to be in place and folded with the latticed shell of the third area, then the special-shaped beam of the fifth area is installed, then the latticed shell of the second area is integrally lifted to be in place and folded with the latticed shell of the third area and the special-shaped beam of the fifth area, and finally the latticed shell of the fourth area is integrally lifted and folded with the special-shaped beam of the fifth area.
(2) The Z-shaped large-span aluminum alloy frame roof adopts an aluminum alloy latticed shell and tree-shaped column structure form, the east-west length is about 104.963m, the south-north maximum width is about 47.427m, the strength performance of an aluminum alloy structure material determines that an integral large-span lifting or jacking method cannot be adopted, and the Z-shaped large-span aluminum alloy frame roof is divided into 5 areas for installation according to the elevation position conditions of a whole structure supporting column, a latticed shell and a peripheral structure, wherein three areas are located above a corridor and are small in area, and five areas are special-shaped steel beams and steel column systems, so that the three areas and the five areas are used as positioning areas of the whole large-span aluminum alloy latticed shell. The tree-shaped columns and the tree-shaped branches are located below the large-span aluminum alloy latticed shell, the tree-shaped columns and the tree-shaped branches are angled to the aluminum alloy structure, the projection length of the tree-shaped branches is larger than that of the aluminum alloy rod piece, the tree-shaped columns and the aluminum alloy structure are connected through steel disc nodes, if the tree-shaped columns and the tree-shaped branches are installed firstly, rhombuses assembled by the aluminum alloy rod piece cannot pass through the tree-shaped branches, the partitioned aluminum alloy structure is lifted or jacked to a designed elevation, and therefore the installation sequence of the first zone, the third zone, the second zone and the fourth zone is determined by the aluminum alloy latticed shell and the tree-shaped column structure. Therefore, during construction, the whole ribbon structure is divided into five subareas, namely a first subarea, a third subarea, a second subarea, a fifth subarea, a fourth subarea and the like from west to east, wherein the first subarea, the third subarea, the second subarea and the fourth subarea are constructed firstly with a latticed shell and then with a tree-shaped support.
(3) When the two-area reticulated shell of the Z-shaped large-span aluminum alloy frame roof is constructed, the reticulated shell of the two areas is divided into two parts, namely a plane part reticulated shell and a vertical surface part reticulated shell, and the plane part reticulated shell is integrally lifted to a certain height; then, mounting a layer of vertical surface part reticulated shell at the end part of the plane part reticulated shell, and integrally lifting the plane part reticulated shell and the layer of vertical surface part reticulated shell to the same height; and installing a layer of vertical surface part reticulated shell at the bottom of the vertical surface part reticulated shell, and integrally lifting the plane part reticulated shell and the two layers of vertical surface part reticulated shells to the same height until the plane part reticulated shell in the second area is folded with the reticulated shell in the third area and the reticulated shell in the vertical surface part in the second area is folded with the special-shaped beam in the fifth area. According to the working principle of lifting in the second area, the vertical surface of the second area is exactly 6 rows of rod pieces, meanwhile, the precision control requirement of lifting equipment is considered, the rod pieces of the vertical surface of the second area can be installed by standing for 4-12 hours every time the rod pieces are lifted by about 150mm, and thus, the lifting precision can be ensured, and the rod pieces of the vertical surface can be installed by enough time.
(4) When the aluminum alloy latticed shell of the first area and the aluminum alloy latticed shell of the second area are constructed, the aluminum alloy latticed shells are firstly assembled on the bailey frames, and then the bailey frames and the aluminum alloy latticed shells are integrally lifted to a design elevation and are folded with the aluminum alloy latticed shells of the third area; then, mounting a tree-shaped support at the bottom of the aluminum alloy reticulated shell; then, mounting a steel frame on the top of the aluminum alloy reticulated shell, and mounting an electric hoist on the steel frame for reversely disassembling the Bailey frames; then, the inner ring bailey frames which can collide with the tree-shaped supports in the lowering process are removed, the inner ring bailey frames are lowered by using an electric hoist, and the outer ring bailey frames are lowered integrally by using lifting equipment; and finally, dismantling the steel frame. After the bailey truss is lifted to the designed elevation, the tree-shaped support is connected with the aluminum alloy latticed shell structure completely, the tree-shaped support is connected with the aluminum alloy latticed shell structure at a certain angle, and the tree-shaped support is inserted into the bailey truss, so that the bailey truss cannot fall to the ground normally. The H-shaped steel connecting beam is installed on the aluminum alloy latticed shell structure which is lifted in place, the inner ring Bailey frames of the tree-shaped supports can be collided in the process of reversely dismounting and putting down the hanging calabash on the H-shaped steel connecting beam, after the Bailey frames of the tree-shaped columns and the tree branches are completely dismounted, the outer ring Bailey frames which cannot collide with the tree-shaped supports in the process of being put down are wholly descended to the ground, and the problem that the tree-shaped columns and the tree branches can be collided when the Bailey frames are wholly put down can be solved in the mode that the Bailey frames are hung on the H-shaped steel connecting beam and the Bailey frames are reversely dismounted.
(5) When the latticed shells of the first area and the second area of the Z-shaped large-span aluminum alloy frame roof are integrally lifted in the subareas, the latticed shells are assembled on the bailey frames, the large-mesh nets are fully paved at the bottoms of the bailey frames, and then the bailey frames and the latticed shells are integrally lifted by using the original structural columns, the lifting equipment and the guy cables. The large eye net is laid below the bailey truss, so that the parts can be prevented from falling or scattering integrally in the lifting process, the cable rope can ensure that the whole structure cannot swing due to the influence of inevitable wind power environmental factors in the lifting process, the error in the lifting process is reduced, the lifting steel wire rope is ensured to be kept vertical in the lifting process, and the steel wire rope stress effect is prevented from being influenced by the eccentric stress of the steel wire rope. When the latticed shell is lifted integrally, the latticed shell is lifted to a certain height, the lifting is suspended, whether the deformation of the latticed shell rod piece unit is consistent with the construction calculated amount or not is monitored, and the construction safety is guaranteed.
(6) Due to the fact that the rigidity of the aluminum alloy material is small, the method similar to the steel structure integral lifting method cannot be adopted, and the construction method can effectively solve the problem of lifting of the large-span aluminum alloy latticed shell structure. Meanwhile, the method can improve the one-time installation rate of the aluminum alloy structure, prevent the component deformation of the aluminum alloy latticed shell structure in the lifting process from influencing the later-stage glass installation precision on the latticed shell, and provide an engineering case for the installation of a similar large-span aluminum alloy structure.
Drawings
FIG. 1 is a schematic plan view of a Z-shaped large-span aluminum alloy frame roof.
FIG. 2 is a schematic elevation view of a Z-shaped large-span aluminum alloy frame roof.
FIG. 3 is a schematic view of a Z-shaped large-span aluminum alloy frame roof construction.
FIG. 4 is a schematic view of a Z-shaped large-span aluminum alloy frame roof construction.
FIG. 5 is a third schematic view of the construction of a Z-shaped large-span aluminum alloy frame roof.
FIG. 6 is a schematic view of a Z-shaped large-span aluminum alloy frame roof construction.
Fig. 7 is a schematic plan view of the beret frame.
Fig. 8 is a schematic view of a truck crane layout.
The attached drawings are marked as follows: 1-tree-shaped support, 2-reticulated shell, 3-bailey frame, 4-corridor, 5-steel column and 6-special-shaped beam.
Detailed Description
In order to make the technical means, innovative features, objectives and functions realized by the present invention easy to understand, the present invention is further described below.
The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The engineering manufacture and installation construction is a multiplex combined construction, the working procedure is complex, the bottom of the reticulated shell adopts a tree-shaped steel structure supporting system, and the top of the reticulated shell is connected with a node disc by using an I-shaped aluminum structure, so that a stable reticulated shell structure form is formed. The single-layer reticulated shell structure node needs to be a semi-rigid joint node, the hole diameter and hole position deviation of the supporting fixed disc and the I-shaped aluminum member is less than or equal to 0.2mm, and the steel structure crankle member is adopted at the corner to tangentially turn, so that the requirements on processing, manufacturing and mounting precision of the tree-shaped steel structure at the bottom of the shell and the shell supporting structure are high. The ribbon has the east-west length of 104.963m and the south-north maximum width of 47.427m, glass is required to be installed on the latticed shell in the design, the surface load on the latticed shell is considered comprehensively and can be large, the number of the tree-shaped columns below the prior art can not meet the load requirement, the using function and the shape of the whole ribbon hall can be influenced if the number of the tree-shaped columns is increased, the aluminum alloy structure has the advantages of small self weight, good stress performance, strong corrosion resistance, strong durability, high-precision prefabrication standardization of a factory, good earthquake resistance, recycling, environmental protection and the like, and therefore the aluminum alloy structure is adopted in the project without adopting a steel structure.
As shown in fig. 1 and 2, a zigzag large-span aluminum alloy frame roof comprises a tree-shaped support 1 and a zigzag aluminum alloy reticulated shell 2 connected to the top of the tree-shaped support 1. The aluminum alloy reticulated shell 2 is formed by splicing reticulated shell component units. The top of the aluminum alloy reticulated shell 2 is connected with a node disc by using an I-shaped aluminum structure to form a stable reticulated shell structure. The Z-shaped large-span aluminum alloy frame roof is sequentially divided into a first area, a third area, a second area, a fifth area and a fourth area from west to east, wherein a latticed shell construction unit of the aluminum alloy latticed shell 2 forming the second area is a bent torsion member, and the fifth area is partially arranged at the internal corner of a ribbon hall and comprises a steel column 5 and a special-shaped beam 6. The profiled beam 6 is a steel member.
As shown in fig. 3-6, the construction method of the Z-shaped large-span aluminum alloy frame roof specifically comprises the following steps:
and S1, erecting a scaffold in three areas, and stacking the three-area aluminum alloy latticed shell 2 in bulk at the high altitude on the scaffold. Specifically, 2 below three district's aluminum alloy reticulated shell are equipped with multilayer vestibule 4, and the top at vestibule 4 is established to the scaffold frame.
And S2, installing the tree-shaped support 1 at the bottom of the three-zone aluminum alloy latticed shell 2 by using a truck crane.
S3, assembling the aluminum alloy latticed shell 2 of the first area on the Bailey frames 3 of the first area, and then fully paving the large mesh net at the bottom of the Bailey frames 3. Then, the lifting equipment is arranged on the original structural column, the output end of the lifting equipment is connected with one end of the guy rope, and the large-eye net is connected with the other end of the guy rope. The lifting device works, and the large-mesh net rises, so that the bailey frames 3 and the aluminum alloy latticed shells 2 are integrally lifted, and the aluminum alloy latticed shells 2 in one area are in place and folded with the aluminum alloy latticed shells 2 in three areas. The safety specification of the large-eye net requires that a double-layer large-eye net is adopted, after the Bailey frames 3 and the aluminum alloy reticulated shell 2 are assembled and the performance of the lifting equipment is checked to be correct, the large-eye net is laid below the Bailey frames 3 and is penetrated into a piece by an A12 steel wire rope, the large-eye net and the Bailey frames 3 are connected by 8# galvanized lead wires, and the distance between the large-eye net and the Bailey frames 3 is not more than 500 mm.
And S4, installing the tree-shaped support 1 at the bottom of the aluminum alloy latticed shell 2 of one area by using a truck crane.
And S5, installing the steel columns 5 and the special-shaped beams 6 of the five areas. And taking the five areas as positioning areas, firstly paying off the positions of the steel columns 5 and the special-shaped beams 6 at the positions of the five areas, firstly installing the steel columns 5 in place, then installing the special-shaped beams 6, temporarily fixing the special-shaped beams, and finally fixing the special-shaped beams after checking.
And S6, assembling the aluminum alloy latticed shell 2 in the second area on the Bailey truss 3 in the second area, and then fully paving a large mesh net at the bottom of the Bailey truss 3. The laying method of the large mesh in the second area is the same as the laying direction of the large mesh in the first area. The aluminum alloy latticed shell 2 in the second lifting area is lifted in place and folded with the aluminum alloy latticed shell 2 in the third area and the special-shaped beam 6 in the fifth area. The lifting method of the aluminum alloy latticed shell 2 and the bailey truss 3 of the plane part of the second area is the same as that of the first area.
And S7, installing the tree-shaped support 1 at the bottom of the aluminum alloy latticed shell 2 in the second area by using a truck crane.
And S8, spraying paint for repairing, and checking and accepting the main structure of the ribbon.
And S9, assembling the aluminum alloy latticed shells 2 in the four areas, jacking the aluminum alloy latticed shells 2 in the four areas in place and folding the aluminum alloy latticed shells 2 with the special-shaped beams 6 in the five areas. After jacking the aluminum alloy latticed shell 2 in the four areas to the designed elevation, erecting a temporary movable scaffold, assembling rod pieces of the aluminum alloy latticed shell 2 at the joints of the four areas and the five areas on the temporary movable scaffold by workers, and finally folding the aluminum alloy latticed shell 2 in the four areas and the special-shaped beam 6 in the five areas.
And S10, installing tree supports 1 at the bottom of the aluminum alloy latticed shell 2 of the four areas by using a truck crane.
And S11, spraying paint for repairing, and checking and accepting the main body structure of the aluminum alloy latticed shell 2.
The method for installing the aluminum alloy latticed shell 2 and the tree-shaped support 1 in the first area comprises the following steps:
s31, erecting a Bailey truss 3 on the existing floor, and then assembling an aluminum alloy latticed shell 2 in one area on the Bailey truss 3. The arrangement of the bailey frames 3 is shown in fig. 7.
And S32, lifting the Bailey frames 3 and the aluminum alloy latticed shells 2 in the first area to a designed height integrally and folding the Bailey frames and the aluminum alloy latticed shells 2 in the third area. When the aluminum alloy reticulated shell 2 is lifted to 140mm-160mm, the lifting is suspended and kept still for 4-12 hours, whether the deformation of the rod element unit of the aluminum alloy reticulated shell 2 is consistent with the construction calculated amount or not is monitored, and formal lifting is started after no abnormity is confirmed. This structure adopts the aluminum alloy structure, because aluminum alloy material rigidity itself is little, and it is great to promote the span of aluminum alloy structure, in order to prevent to warp at promotion in-process aluminum alloy structure, according to design requirement and relevant standard regulation, the aluminum alloy structure levelness is 2mm, it should not too big to promote speed, need detect at the promotion in-process, it is too big to prevent that the aluminum alloy structure from warping, the influence promotes the precision of installation glass when the design elevation, consider environmental wind power simultaneously, the influence of temperature effect, accomplish to promote qualification rate once, reduce later stage adjustment installation error's work load.
And S33, laying a crane operation platform on the existing floor, erecting a truck crane on the crane operation platform, and installing the tree-shaped support 1 by using the truck crane.
S34, mounting a steel frame on the top of the aluminum alloy latticed shell 2 in the first area, and mounting an electric hoist on the steel frame.
S35, fixing the Bailey frames 3 by using a crane, then removing the inner ring Bailey frames which can collide with the tree-shaped supports 1 in the lowering process, and reserving the outer ring Bailey frames which cannot collide with the tree-shaped supports 1 in the direct lowering process, so that the inner ring Bailey frames and the outer ring Bailey frames are completely separated.
And S36, the electric hoist is used for lowering the inner ring bailey frames to the existing floor one by one, and the inner ring bailey frames are ensured to have no contact collision with the tree-shaped support 1 during lowering.
And S37, wholly lowering the outer ring bailey frames to the existing floor by adopting lifting equipment.
And S39, dismantling the steel frame.
The mounting method of the aluminum alloy latticed shell 2 in the second area comprises the following specific steps:
s61, erecting a Bailey truss 3 on the ground, assembling the aluminum alloy latticed shell 2 of the plane part of the second area on the Bailey truss 3, lifting the aluminum alloy latticed shell 2 of the plane part of the second area to a certain height, and suspending lifting.
S62, mounting a layer of aluminum alloy latticed shell 2 of the vertical face part at the end part of the aluminum alloy latticed shell 2 of the second-area plane part, then lifting the aluminum alloy latticed shell 2 of the second-area plane part and the aluminum alloy latticed shell 2 of the vertical face part together to the same height, and suspending lifting.
S63, mounting a layer of aluminum alloy latticed shell 2 of the vertical face part at the bottom of the aluminum alloy latticed shell 2 of the vertical face part of the second area, lifting the aluminum alloy latticed shell 2 of the plane part of the second area and the aluminum alloy latticed shells 2 of the two vertical face parts together to the same height, and suspending lifting.
And S64, repeating the steps S62 and S63 until the aluminum alloy latticed shell 2 of the plane part of the second area is folded with the aluminum alloy latticed shell 2 of the third area, and the aluminum alloy latticed shell 2 of the vertical part of the second area is folded with the special-shaped beam 6 of the fifth area. When the aluminum alloy latticed shells 2 of the two-area vertical surface part are installed, the bailey frames 3 are fixed with temporary hoops on the original building through guy cables, and after the aluminum alloy latticed shells 2 of each layer of vertical surface part are installed, the temporary hoops are dismantled and the aluminum alloy latticed shells are moved to the next pause elevation until all the aluminum alloy latticed shells 2 of the two-area vertical surface part are installed.
The lifting method of the aluminum alloy latticed shell 2 comprises the following specific steps:
1. dividing the ground right below the projection surface of the aluminum alloy latticed shell 2 by-0.3 m-5.8m into five regions according to the construction region;
2. arranging a lifting platform by utilizing the adjacent existing building columns;
3. installing hydraulic synchronous lifting system equipment comprising a hydraulic pump source system, a lifter, a sensor and the like;
4. installing a temporary lifting pipe and a special lifting appliance at the position of the lifting unit corresponding to the upper lifting point;
5. a special bottom anchor and a special steel strand are arranged between the lifting upper lifting point and the lifting lower lifting point;
6. debugging a hydraulic synchronous lifting system;
7. stretching the steel strands to enable all the steel strands to be stressed uniformly;
8. checking whether the shell structure lifting unit and all temporary measures of hydraulic synchronous lifting meet design requirements;
9. after the error is confirmed, the loading is carried out step by step according to the sequence of 20%, 40%, 60%, 70%, 80%, 90%, 95% and 100% of the designed load until the lifting unit is separated from the ground temporary assembly platform.
The main inspection of the reticulated shell and the bailey truss is as follows: 1. whether the connection part of the jig frame lifting measure tool meets the requirement or not is judged; 2. and the net frame is monitored whether the deflection stress meets the requirements by a third-party monitoring unit.
The main inspection of the lifting equipment: 1. the lifting equipment has the oil leakage phenomenon; 2, detecting whether the system displacement and pressure are normal or not in a numerical control mode; 3. whether the upper anchorage device and the lower anchorage device meet the requirements or not.
And after the lifting unit is lifted by about 150mm, the lifting is suspended, whether the deformation of the shell rod unit is consistent with the construction calculated amount or not is monitored, and the deformation control monitoring in the lifting process is timely processed by taking structural calculation analysis as a basis, structural safety as a purpose and deformation coordination as a core.
As shown in fig. 8, when tree-shaped supports 1 of the first and third zones are installed, the truck is installed on the platform of the truck in the first zone, when tree-shaped supports 1 of the second zone are installed, the truck is installed on the platform of the truck in the second zone, and when tree-shaped supports 1 of the fourth zone are installed, the truck is installed on the east side of the fourth zone.
Specifically, taking a project as an example, the Z-shaped large-span aluminum alloy frame roof is a steel-aluminum combined member, the length in the east-west direction is 104.963m, and the widest position in the north-south direction is 47.427 m. According to the construction process and site conditions, the installation of the aluminum alloy latticed shell is divided into 5 construction areas, wherein the lengths of 5 divided areas are respectively as follows: 36.7m, zone two: 30.0m, three regions: 14.9m, four regions: 21.76m, five regions: 1.601 m. The maximum height of the tree support 1 is 27.78 m.
The above examples are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. The construction method of the Z-shaped large-span aluminum alloy frame roof is characterized by comprising a tree-shaped support (1) and a Z-shaped aluminum alloy latticed shell (2) connected to the top of the tree-shaped support (1), wherein the roof is sequentially divided into a first area, a third area, a second area, a fifth area and a fourth area from west to east, wherein latticed shell component units of the aluminum alloy latticed shell (2) forming the second area are cranked components, the fifth area comprises a steel column (5) and a special-shaped beam (6), and the construction method comprises the following steps:
s1, erecting a scaffold on the existing floor slab in the three areas, and arranging an aluminum alloy latticed shell (2) in the three areas in bulk on the scaffold in a high altitude mode;
s2, mounting tree-shaped supports (1) at the bottom of the three-zone aluminum alloy latticed shell (2);
s3, assembling the aluminum alloy latticed shell (2) in the first area on the Bailey frames (3) in the first area, and lifting the aluminum alloy latticed shell (2) in the first area to be in place and folding the aluminum alloy latticed shell (2) in the third area;
s4, mounting a tree-shaped support (1) at the bottom of the aluminum alloy latticed shell (2) in the first area;
s5, mounting steel columns (5) and special-shaped beams (6) of the five areas;
s6, assembling the aluminum alloy latticed shell (2) in the second area on the Bailey truss (3) in the second area, lifting the aluminum alloy latticed shell (2) in the second area to be in place, and folding the aluminum alloy latticed shell (2) in the third area and the special-shaped beam (6) in the fifth area;
s7, mounting tree-shaped supports (1) at the bottom of the aluminum alloy latticed shell (2) in the second area;
s8, spraying paint for repairing, and checking and accepting the main structure;
s9, assembling the aluminum alloy latticed shells (2) in the four areas, jacking the aluminum alloy latticed shells (2) in the four areas in place and folding the aluminum alloy latticed shells with the special-shaped beams (6) in the five areas;
s10, mounting tree-shaped supports (1) at the bottoms of the four aluminum alloy latticed shells (2);
and S11, spraying paint for repairing, and checking and accepting the main structure of the aluminum alloy latticed shell (2).
2. The construction method of a Z-shaped large-span aluminum alloy frame roof as claimed in claim 1, wherein the installation method of the two-zone aluminum alloy latticed shell (2) comprises the following steps:
s61, erecting a Bailey truss (3) on the ground, assembling an aluminum alloy latticed shell (2) of the plane part of the second area on the Bailey truss (3), lifting the aluminum alloy latticed shell (2) of the plane part of the second area to a certain height, and suspending lifting;
s62, mounting a layer of aluminum alloy latticed shell (2) of the vertical face part at the end part of the aluminum alloy latticed shell (2) of the plane part of the second area, then lifting the aluminum alloy latticed shell (2) of the plane part of the second area and the aluminum alloy latticed shell (2) of the vertical face part of the first layer at the same height, and suspending lifting;
s63, mounting a layer of aluminum alloy latticed shell (2) of the vertical face part at the bottom of the aluminum alloy latticed shell (2) of the vertical face part of the second area, lifting the aluminum alloy latticed shell (2) of the plane part of the second area and the aluminum alloy latticed shells (2) of the two layers of vertical face parts to the same height, and suspending lifting;
s64, repeating the steps S62 and S63 until the aluminum alloy latticed shell (2) of the plane part of the second area is folded with the aluminum alloy latticed shell (2) of the third area, and the aluminum alloy latticed shell (2) of the vertical part of the second area is folded with the special-shaped beam (6) of the fifth area.
3. The construction method of a Z-shaped large-span aluminum alloy frame roof as claimed in claim 2, characterized in that the Bailey truss (3) at the bottom of the aluminum alloy latticed shell (2) of the plane part of the second area is removed after the tree-shaped supports (1) of the second area are installed.
4. The construction method of a zigzag large-span aluminum alloy frame roof as claimed in claim 2, characterized in that: when the aluminum alloy latticed shells (2) of the two-area vertical surface part are installed, the bailey frames (3) are fixed with temporary hoops on the original building through guy cables, and after the aluminum alloy latticed shells (2) of each layer of vertical surface part are installed, the temporary hoops are dismantled and moved to the next pause elevation until all the aluminum alloy latticed shells (2) of the two-area vertical surface part are installed.
5. The construction method of a Z-shaped large-span aluminum alloy frame roof as claimed in claim 1, wherein the installation method of the aluminum alloy latticed shell (2) and the tree support (1) of one area comprises the following steps:
s31, erecting a bailey truss (3) on the existing floor, and then assembling an aluminum alloy latticed shell (2) in one area on the bailey truss (3);
s32, integrally lifting the bailey frames (3) and the aluminum alloy latticed shells (2) in the first area to a designed height and folding the bailey frames and the aluminum alloy latticed shells (2) in the third area;
s33, laying a crane operation platform on the existing floor, erecting a truck crane on the crane operation platform, and installing the tree-shaped support (1) by using the truck crane;
s34, mounting a steel frame on the top of the aluminum alloy latticed shell (2) in the first area, and mounting an electric hoist on the steel frame;
s35, fixing the Bailey frames (3) by using a crane, then removing the inner ring Bailey frames which can collide with the tree-shaped support (1) in the lowering process, and reserving the outer ring Bailey frames which cannot collide with the tree-shaped support (1) in the direct lowering process, so that the inner ring Bailey frames and the outer ring Bailey frames are completely separated;
s36, the inner ring bailey frames are lowered to the existing floor one by one through an electric hoist, and no contact collision between the inner ring bailey frames and the tree-shaped support (1) is guaranteed during lowering;
s37, integrally lowering the outer ring bailey frames to the existing floor by adopting lifting equipment;
and S39, dismantling the steel frame.
6. The construction method of a Z-shaped large-span aluminum alloy frame roof as claimed in claim 5, wherein: the bottom of the bailey truss (3) in the first area is paved with a large eye net, the lifting equipment is arranged on the original structural column, the output end of the lifting equipment is connected with one end of the guy rope, and the large eye net is connected with the other end of the guy rope.
7. The construction method of a Z-shaped large-span aluminum alloy frame roof as claimed in claim 5, wherein: after the aluminum alloy latticed shell (2) in the first area is lifted to 140mm-160mm, the lifting is suspended and kept still for 4-12 hours, whether the deformation of the rod unit of the aluminum alloy latticed shell (2) is consistent with the construction calculated amount or not is monitored, and formal lifting is started after no abnormity is confirmed.
8. The construction method of a zigzag large-span aluminum alloy frame roof as claimed in claim 1, wherein: the tree-shaped supports (1) are installed by using the truck cranes, when the tree-shaped supports (1) of the first area and the third area are installed, the truck cranes are arranged on the truck crane platform of the first area, when the tree-shaped supports (1) of the second area are installed, the truck cranes are arranged on the truck crane platform of the second area, and when the tree-shaped supports (1) of the fourth area are installed, the truck cranes are arranged on the east side of the fourth area.
9. The construction method of a zigzag large-span aluminum alloy frame roof as claimed in claim 1, wherein: after jacking the aluminum alloy latticed shells (2) in the four areas to the designed elevation, erecting a temporary movable scaffold, assembling rod pieces of the aluminum alloy latticed shells (2) at the joints of the four areas and the five areas on the temporary movable scaffold by workers, and finally folding the aluminum alloy latticed shells (2) in the four areas and the special-shaped beams (6) in the five areas.
10. The construction method of a zigzag large-span aluminum alloy frame roof as claimed in claim 1, wherein: the aluminum alloy latticed shell (2) below of three regions is equipped with multilayer vestibule (4), and the scaffold frame is taken and is established at the top of vestibule (4), assembles the member of aluminum alloy latticed shell (2) of seam crossing on three regions's scaffold frame, accomplishes and folds the construction.
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