Segmented accumulative slippage construction method for large-span steel structure

Abstract

The invention provides a large-span steel structure segment accumulative slippage construction method which comprises the following steps: S1, dividing a construction area into a truss block integral splicing area and a truss block positioning area, and arranging a truss segment ground splicing area on the outer side of the construction area; s2, setting a ground splicing jig frame, a whole splicing jig frame and a slippage measure; s3, truss segments are spliced in the truss segment ground splicing area; s4, the truss segments are integrally spliced into a truss block, the next truss block is spliced in a sliding mode, operation is repeated, sliding is conducted step by step, and truss blocks spliced by the multiple truss blocks are completed; s5, integrally sliding the truss blocks to a designated position, and repeating to complete splicing and positioning of all the truss blocks; and S6, inlaying is conducted between the adjacent truss blocks, truss block ground splicing is conducted in the truss block whole splicing area, and construction is completed. According to the method, disturbance of floor construction on a traditional crane to a floor structure can be avoided, meanwhile, use of a lower interlayer supporting frame body is reduced, and the construction period is shortened.

Description

Technical Field

[0001] This invention relates to the field of steel structure building construction technology, specifically to a segmented cumulative sliding construction method for large-span steel structures. Background Technology

[0002] The steel structure forms of newly built factory buildings are constantly evolving from traditional single-story, single-span, and lightweight designs to more diverse shapes, larger spans, more complex nodes, and greater overall weight. When the main structure under a large-span steel structure system is a multi-story concrete beam-slab structure, the load-bearing capacity of the floor slabs is limited. If traditional construction methods are used to directly hoist the components onto the floor slabs, the supporting system under the floor slabs cannot be removed. This results in the inability to carry out overlapping construction on multiple floors below, seriously affecting the construction period and causing a large backlog of turnover materials. Furthermore, the use of large-tonnage cranes on the floor surface can easily damage the floor, leading to a large amount of repair work later. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention proposes a segmented cumulative sliding construction method for large-span steel structures, which can avoid the disturbance to the floor structure caused by traditional crane construction on the floor, while reducing the use of the lower inter-floor support frame and shortening the construction period.

[0004] The present invention provides a segmented cumulative sliding construction method for large-span steel structures, comprising the following steps: S1: Divide the construction area into a truss section assembly area and a truss segment placement area, and set up a truss segment ground assembly area outside the construction area. S2: Carry out construction preparation, set up ground assembly frames in the truss segment ground assembly area, set up whole assembly frames in the truss whole assembly area, and set up sliding measures in the truss whole assembly area and truss block placement area; S3: Truss segment assembly, assembling truss segments in the ground assembly area for truss segments; S4: The truss segments are lifted and transferred to the truss assembly area. The truss segments are assembled into truss segments in the air. After one truss segment is completed, it slides into the construction area to make room for the next truss segment to be assembled. Two truss segments are then spliced ​​together. The operation is repeated to gradually slide and complete the truss block composed of several truss segments. S5: Slide the completed truss block as a whole into the construction area to the designated truss block placement area and place it in place. Repeat steps S3-S4 to complete the assembly of all truss blocks and slide them into place to the designated truss block placement area. S6: Interlocking is performed between adjacent truss sections, and the truss sections are assembled on the ground in the truss section assembly area to complete the construction.

[0005] Furthermore, the truss section assembly area is divided into the first and fifth sections located at both ends of the construction area. The truss section placement area includes the second, third, and fourth sections located sequentially between the first and fifth sections. The truss sections slide away from the second section in a direction away from the first section, and slide away from the third and fourth sections in a direction away from the second section. A first interlocking section is provided between the second and third sections, and a second interlocking section is provided between the third and fourth sections. The truss section ground assembly areas are respectively located on the outside of the first and fifth sections.

[0006] Furthermore, the ground assembly frame includes structural steel, bottom embedded parts, and lateral support steel channels.

[0007] Furthermore, the complete assembly frame includes several support components, each including three support columns. A pair of intersecting diagonal braces are provided between the two transverse support columns, and diagonal braces are provided between the two transverse support columns and the ground. One of the diagonal braces is connected to the bottom of the other support column. When assembling the first truss section, H-beam supports are provided on the side of the first truss.

[0008] Furthermore, there are at least three sliding measures, distributed on both sides and in the middle of the construction area. The sliding measures include sliding rails, steel sliders, jacking devices, and jacking lugs. Concrete columns and track beams made of the factory building structure are set on both sides and in the middle of the construction area. The concrete columns are supported at the bottom of the track beams. The top height of the concrete beams is flush with the top of the assembled jig. Sliding embedded parts are provided on the track beams. The sliding rails are channel steel rails. The sliding rails are set on the track beams through the sliding embedded parts. The jacking lugs are set on the lower chord of the truss. The steel sliders are set at the bottom of the truss and can slide in the sliding rails. One end of the jacking device is rotatably connected to the jacking lugs, and the other end is set on the sliding rails.

[0009] Furthermore, the truss segments are positioned by replacing the support base plate with a steel slider. After the truss segments slide into place, a hydraulic jack is used to lift the truss segments, the steel slider and sliding track are removed, the support base plate is installed, and the truss segments are placed into position. 7. According to claim 1, a method for cumulative sliding construction of large-span steel structures in segments is characterized in that the truss is a plate-type orthogonal truss composed of welded H-shaped steel, the truss members have box-shaped and H-shaped cross-sections, the main truss is divided into 5 truss segments, the truss members are fabricated in the factory as individual parts, transported to the ground assembly area of ​​the truss segments for assembly into truss segments, the truss segments are lifted to the air by crawler cranes and placed on the assembly jig for the overall assembly of the truss segments, and after the welding of one truss segment is completed, the cumulative sliding construction is carried out.

[0010] Furthermore, in step S3, the truss segment assembly process includes positioning and laying out the jig, assembling the upper and lower chords, assembling the straight web members, assembling the diagonal web members, and finally completing the overall welding.

[0011] Furthermore, in step S4, the sequence of hoisting the truss section is as follows: hoisting the middle section, hoisting the sections on both sides of the middle section, hoisting the two outer sections, and hoisting the air vent.

[0012] The present invention provides a segmented cumulative sliding construction method for large-span steel structures, which avoids the disturbance to the floor structure caused by traditional crane construction on the floor and reduces the use of the lower inter-floor support frame, thus shortening the construction period. Attached Figure Description

[0013] The invention will now be further described and explained with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the entire truss section supported by the prefabricated frame.

[0015] Figure 2 This is a structural diagram of the support components of the complete tire frame.

[0016] Figure 3 This is a structural diagram of the first truss section supported by the whole assembly frame.

[0017] Figure 4 This is a top view of the sliding mechanism.

[0018] Figure 5 It is a plan showing the division of the construction area.

[0019] Attached reference numerals: 11. First segment; 12. Second segment; 13. Third segment; 14. Fourth segment; 15. Fifth segment; 21. First interlocking segment; 22. Second interlocking segment; 23. Ground assembly area for truss segments; 3. Complete assembly jig; 31. Support column; 32. Diagonal tie rod; 33. Diagonal brace; 34. First truss; 35. H-beam support; 4. Sliding measures; 41. Concrete pile; 42. Track beam; 43. Sliding track; 44. Sliding embedded part; 45. Steel slider; 46. Jacking device; 47. Jacking lug; 5. Truss section. Detailed Implementation

[0020] The technical solution of the present invention will be more clearly and completely explained below with reference to the accompanying drawings and through the description of preferred embodiments of the present invention.

[0021] A preferred embodiment of the present invention provides a segmented cumulative sliding construction method for large-span steel structures, comprising the following steps: S1: As Figure 5As shown, the construction area is divided into a truss assembly area and a truss segment placement area. A truss segment ground assembly area is set up outside the construction area. The truss assembly area consists of the first segment 11 and the fifth segment 15 located at both ends of the construction area. Specifically, in this embodiment, the first segment 11 is located on the north side of the factory building, and the fifth segment 15 is located on the south side of the factory building.

[0022] The truss segment placement area includes a second segment 12, a third segment 13, and a fourth segment 14 located sequentially between the first segment 11 and the fifth segment 15. The second segment 12 slides away from the first segment 11, and the third segment 13 and the fourth segment 14 slide away from the second segment 12. The interlocking segment includes a first interlocking segment 21 located between the second segment 12 and the third segment 13, and a second interlocking segment 22 located between the third segment 13 and the fourth segment 14.

[0023] S2: Conduct construction preparation, setting up ground assembly frames, integral assembly frames 3, and sliding measures 4 in the ground assembly area of ​​the truss segments; the ground assembly frames are set on the outer sides of the ground assembly segment areas on both sides, with one set of ground assembly frames on the outer side of the first segment 11 and two sets on the outer side of the fifth segment 15. The ground assembly frames use structural steel, bottom embedded parts, and lateral support steel channels.

[0024] like Figure 2 As shown, the complete assembly frame 3 includes several support components, each including three support columns 31. A pair of intersecting diagonal braces 32 are provided between two transverse support columns 31. Diagonal struts 33 are provided between the two transverse support columns 31 and the ground, with one strut 33 connected to the bottom of the other support column 31. When the first truss section 5 is assembled, H-beam supports 35 are installed on the side of the first truss. like Figure 3 As shown, there are at least three sliding measures 4. The sliding measures 4 include a sliding track 43, a steel slider 45, a jacking device 46, and a jacking lug 47. Concrete columns 41 and track beams 42 of the factory structure are set on both sides and in the middle of the construction area. The concrete columns 41 are supported at the bottom of the track beams 42. The top height of the concrete beams 41 is flush with the top of the whole assembly frame 3. Sliding embedded parts 44 are provided on the track beams 42. The sliding track 43 is a channel steel track. The sliding track 43 is set on the track beams 42 through the sliding embedded parts 44. The jacking lug 45 is set on the lower chord of the truss. The steel slider 43 is set at the bottom of the truss and can slide in the sliding track 42. One end of the jacking device 44 is connected to the jacking lug 45 and the other end is connected to the sliding track 43.

[0025] S3: Truss segment assembly; truss segments are assembled in the ground assembly area; the truss is a plate-type orthogonal truss composed of welded H-beams, such as... Figure 4 and Figure 5As shown, the truss members have box and H-shaped cross-sections. The main truss is divided into 5 hoisting sections. The truss is fabricated in parts at the factory, transported to the site for assembly, and then hoisted onto the high-altitude support column 32 for final assembly. After the welding of each truss section is completed, cumulative sliding construction is carried out. The roof truss is not segmented. The truss assembly process includes positioning and marking on the jig, assembling the upper and lower chords, assembling the straight web members, assembling the diagonal web members, and finally completing the overall welding.

[0026] S4: The truss segments are lifted and transferred to the truss assembly area. The truss segments are assembled into truss segments in the air. After one truss segment is completed, it slides into the construction area to make room for the next truss segment to be assembled. Two truss segments are then spliced ​​together. The operation is repeated to gradually slide and complete the truss block composed of several truss segments. S5: Slide the completed truss block as a whole into the construction area to the designated truss block placement area and place it in place. Repeat steps S3-S4 to complete the assembly of all truss blocks and slide them into place to the designated truss block placement area. S6: Interlocking is performed between adjacent truss sections, and the truss sections are assembled on the ground in the truss section assembly area to complete the construction.

[0027] By employing segmented cumulative sliding construction technology for large-span steel structures, the disturbance to the floor structure caused by traditional crane-assisted floor-level construction can be avoided. This also reduces the need for lower-level inter-floor support frames and allows for simultaneous multi-disciplinary construction within the lower floors, thereby shortening the construction period. This technology improves steel structure installation efficiency, operational safety, and versatility, enhancing the technical capabilities of engineering construction and achieving goals such as material conservation, water conservation, energy conservation, and environmental protection. Ultimately, this technology can improve the technical level of construction companies. In actual construction, it has achieved cost savings and high-quality development goals, promoting the development of the construction industry in the field of large-span steel structure construction.

[0028] The above-described specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications, substitutions, and improvements made by those skilled in the art to the technical solutions of the present invention based on the provided textual description and drawings, without departing from the design concept and spirit of the present invention, should all fall within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. A method for segmented cumulative sliding construction of large-span steel structures, characterized in that, Includes the following steps: S1: Divide the construction area into a truss section assembly area and a truss segment placement area, and set up a truss segment ground assembly area outside the construction area. S2: Carry out construction preparation, set up ground assembly frames in the truss segment ground assembly area, set up whole assembly frames in the truss whole assembly area, and set up sliding measures in the truss whole assembly area and truss block placement area; S3: Truss segment assembly, assembling truss segments in the ground assembly area for truss segments; S4: The truss segments are lifted and transferred to the truss assembly area. The truss segments are assembled into truss segments in the air. After one truss segment is completed, it slides into the construction area to make room for the next truss segment to be assembled. Two truss segments are then spliced ​​together. The operation is repeated to gradually slide and complete the truss block composed of several truss segments. S5: Slide the completed truss block as a whole into the construction area to the designated truss block placement area and place it in place. Repeat steps S3-S4 to complete the assembly of all truss blocks and slide them into place to the designated truss block placement area. S6: Interlocking is performed between adjacent truss sections, and the truss sections are assembled on the ground in the truss section assembly area to complete the construction.

2. The method for segmented cumulative sliding construction of a large-span steel structure according to claim 1, characterized in that, The truss section assembly area consists of the first and fifth sections located at both ends of the construction area. The truss section placement area includes the second, third, and fourth sections located sequentially between the first and fifth sections. The truss sections slide away from the second section in a direction away from the first section, and the truss sections slide away from the third and fourth sections in a direction away from the second section. A first interlocking section is provided between the second and third sections, and a second interlocking section is provided between the third and fourth sections. The truss section ground assembly areas are respectively located on the outside of the first and fifth sections.

3. The method for segmented cumulative sliding construction of a large-span steel structure according to claim 1, characterized in that, The ground assembly frame includes structural steel, bottom embedded parts, and lateral support steel channels.

4. The method for segmented cumulative sliding construction of a large-span steel structure according to claim 3, characterized in that, The complete assembly frame includes several support components, each of which includes three support columns. A pair of intersecting diagonal braces are provided between two transverse support columns, and diagonal braces are provided between the two transverse support columns and the ground. One of the diagonal braces is connected to the bottom of the other support column. When assembling the first truss section, H-shaped steel supports are provided on the side of the first truss.

5. The method for segmented cumulative sliding construction of a large-span steel structure according to claim 4, characterized in that, The number of sliding measures is at least three, distributed on both sides and in the middle of the construction area. The sliding measures include sliding rails, steel sliders, jacking devices, and jacking lugs. Concrete columns and track beams of the factory structure are set on both sides and in the middle of the construction area. The concrete columns are supported at the bottom of the track beams. The top height of the concrete beams is flush with the top of the assembled jig. Sliding embedded parts are provided on the track beams. The sliding rails are channel steel rails. The sliding rails are set on the track beams through the sliding embedded parts. The jacking lugs are set on the lower chord of the truss. The steel sliders are set at the bottom of the truss and can slide in the sliding rails. One end of the jacking device is rotatably connected to the jacking lugs, and the other end is set on the sliding rails.

6. The method for segmented cumulative sliding construction of a large-span steel structure according to claim 5, characterized in that, The truss sections are positioned by replacing the support base plate with a steel slider. After the truss section slides into place, a hydraulic jack is used to lift the truss section, the steel slider and sliding track are removed, the support base plate is installed, and the truss section is placed into position.

7. The method for segmented cumulative sliding construction of a large-span steel structure according to claim 1, characterized in that, The truss is a plate-type orthogonal truss composed of welded H-beams. The truss members have box and H-shaped cross-sections. The main truss is divided into 5 truss segments. The truss members are fabricated in the factory as individual parts and transported to the ground assembly area for truss segment assembly. The truss segments are lifted to the air by crawler cranes and placed on the assembly jig for the overall truss assembly. After the overall truss segment is completed and welded, it is then slid and accumulated during construction.

8. The method for segmented cumulative sliding construction of a large-span steel structure according to claim 1, characterized in that, In step S3, the truss segment assembly process includes positioning and laying out the jig, assembling the upper and lower chords, assembling the straight web members, assembling the diagonal web members, and finally completing the overall welding.

9. The method for segmented cumulative sliding construction of a large-span steel structure according to claim 1, characterized in that, In step S4, the sequence of hoisting the truss section is as follows: hoisting the middle section, hoisting the sections on both sides of the middle section, hoisting the two outer sections, and hoisting the air vent.

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