Method of installing a ship-shaped truss

Abstract

The present application relates to a kind of installation methods of ship-shaped truss, the technical field of steel structure, installation method includes the following operating steps: first step: ship ridge diamond truss assembly, since ship ridge diamond truss assembly height is too high from floor height, to reduce ship ridge diamond truss high-altitude assembly quantity, ground segmented assembly is adopted first, then high-altitude segmented group assembly process is adopted.Second step: ship ridge diamond truss both sides are assembled by crane with the contact truss of ship body.Third step: the assembly process of ship body edge truss is carried out, and ship body edge truss uses orthogonal square plane staggered grid.Fourth step: ship head truss assembly, then complete with the assembly of ship ridge diamond truss.Fifth step: entire lifting ship-shaped truss is lifted to design elevation position using hydraulic lifting equipment, the hoisting and support installation of flower column are completed, and the installation process of entire ship-shaped truss is completed.It has the characteristics of compact structure, high structural strength and good stability.Solve the problem of building steel structure in ship-shaped space.

Description

Technical Field

[0001] This invention relates to the field of steel structure technology, and specifically to an installation method for a ship-shaped truss. Background Technology

[0002] A truss is a structure composed of members connected at both ends by hinges. Trusses are planar or spatial structures generally composed of straight members and triangular units. Truss members primarily bear axial tension or compression, thus making full use of the material's strength. For large spans, trusses can save material compared to solid-web beams, reducing self-weight and increasing stiffness. Based on the axes of the truss members and the distribution of external forces, trusses can be divided into planar trusses and spatial trusses. Spatial structures such as roof trusses or bridges are composed of a series of parallel planar trusses.

[0003] The advantages of trusses are that the members primarily bear tension or compression, making full use of materials, saving materials, and reducing structural weight. Commonly used trusses include steel trusses, reinforced concrete trusses, prestressed concrete trusses, timber trusses, steel-timber composite trusses, and steel-concrete composite trusses. Truss types include triangular trusses, trapezoidal trusses, polygonal trusses, open-web trusses, and truss bridges. Currently, there is no known structural type or construction technique for building ship-shaped trusses. Summary of the Invention

[0004] This invention primarily addresses the shortcomings of existing technologies by providing a method for installing a ship-shaped truss, characterized by its compact structure, high structural strength, and good stability. It solves the problem of constructing steel structures within a ship-shaped space, enabling the widespread application of ship-shaped truss structures in the construction field.

[0005] The above-mentioned technical problems of the present invention are mainly solved by the following technical solutions:

[0006] The described ship-shaped truss structure includes a ridge rhomboid truss, with bow trusses at both ends. Several flowering columns are located at the lower end of the ridge rhomboid truss. Hull edge trusses, forming a ship-shaped frame structure, are located on the left and right sides of the ridge rhomboid truss. Several hull connecting trusses, welded horizontally and vertically to the ridge rhomboid truss, are provided between the hull edge trusses and the ridge rhomboid truss. The flowering columns are prior art; refer to Chinese Patent "A Steel Structure Lotus Valley Column Structure," application number 2021206055910.

[0007] The aforementioned rhomboid truss of the ridge includes a truss upper chord, a truss middle chord, and a truss lower chord. The number of truss middle chords is two, and there is one truss upper chord and one truss lower chord. The rhomboid truss of the ridge has a rhomboid structure. A truss web member is provided between the truss middle chords. A truss upper web member is provided between the truss upper chord and the truss middle chord. A truss lower web member is provided between the truss lower chord and the truss middle chord.

[0008] The installation method includes the following steps:

[0009] Step 1: Assemble the diamond truss of the ridge. Since the maximum assembly height of the diamond truss of the ridge is 11.67m above the floor, which is too high, in order to reduce the amount of high-altitude assembly of the diamond truss of the ridge, a process of assembling it in sections on the ground first and then assembling it in sections at high altitude was adopted.

[0010] Step 2: Use a crane to assemble the hull connecting trusses on both sides of the rhomboid truss of the stern.

[0011] Step 3: The assembly of the hull edge trusses is carried out using a crane. The hull edge trusses utilize an orthogonal square plane staggered space frame.

[0012] Step 4: Assemble the bow truss, and then complete the assembly with the rhomboid truss of the stern.

[0013] Step 5: Use hydraulic lifting equipment to lift the entire ship-shaped truss to the design elevation, complete the hoisting and support installation of the flowering columns, and complete the installation process of the entire ship-shaped truss.

[0014] Preferably, the lower end of the bow truss is supported by a steel pipe column, and a box column is provided between the middle of the steel pipe column and the bow truss. The box column is used to enhance the stability of the steel pipe column's support for the bow truss.

[0015] As a preferred option, the segmented assembly length of the rhomboid truss of the ridge is mainly 16.5m to 33.0m. The number of assembly jigs is set according to the number of chord segments of the rhomboid truss of the ridge. Jigs are set on both sides of the middle chord and jigs are set at the ends of the chords on both sides. There are no less than 2 jigs for a single rhomboid truss segment.

[0016] Preferably, the ridge rhomboid truss is composed of several rhomboid trusses. The hoisting section of a single rhomboid truss is assembled on the floor using a truck crane. The assembly is carried out in the following positioning sequence: middle chord of truss → lower chord of truss → lower web member of truss → middle web member of truss → upper chord of truss → upper web member of truss. The truss members are positioned by spot welding and timely re-measurement. When positioning the members, the chord is fixed with temporary ear plates, and the web members are temporarily fixed to the chord by spot welding.

[0017] As a preferred option, to avoid stress concentration during welding, the overall welding sequence of the truss is determined to be from the middle to both sides, and the welding sequence of the chord members is to weld clockwise from two points that are 180 degrees apart.

[0018] As a preferred method, first lay out the jig and position the lower chord and middle chord of the rhomboid truss of the ridge. Then, assemble the lower web members and middle web members of the lower part of the rhomboid truss of the ridge, so that the lower part of the rhomboid truss of the ridge is assembled into a triangular truss. Then, install the upper chord and upper web members of the truss to complete the rhomboid truss assembly process.

[0019] As a preferred method, when assembling the hull edge trusses, the jig for the lower chord spheres should be positioned first to ensure precision control requirements. The accepted welded spheres should be placed into the installation nodes according to specifications and numbers, and the force direction and position of the spheres should be adjusted. Next, the position of the lower chord spheres of the space frame should be positioned, and the jig for assembling the lower chord sphere tubes of the space frame should be arranged. Then, the lower chord members between the lower chord spheres of the space frame should be installed. The vertical web members should be positioned and installed separately before the upper chord spheres are installed. After the vertical web members are positioned, the upper chord spheres and upper chord members of the space frame should be assembled in the order of 1 sphere n tubes. Finally, the web members between the chord members of the space frame should be installed.

[0020] As a preferred option, the topspin ball and topspin club are assembled on the ground in the form of two balls per club, one ball per club, one ball per two clubs, or one ball per three clubs, and then assembled on top of the cell.

[0021] Preferably, the circumferential weld seam of the horizontal centerline of the welding ball is placed in the equatorial direction.

[0022] The present invention can achieve the following effects:

[0023] This invention provides a method for installing a ship-shaped truss, which, compared with existing technologies, features a compact structure, high structural strength, and good stability. It solves the problem of constructing steel structures within a ship-shaped space, enabling the widespread application of ship-shaped truss structures in the construction field. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the ridge rhomboid truss of the present invention.

[0026] In the diagram: 1. Flowering column; 2. Ridge diamond truss; 3. Hull edge truss; 4. Hull connecting truss; 5. Bow truss; 6. Box column; 7. Steel pipe column; 8. Upper web member of truss; 9. Upper chord member of truss; 10. Middle chord member of truss; 11. Lower chord member of truss; 12. Lower web member of truss; 13. Middle web member of truss. Detailed Implementation

[0027] The technical solution of the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0028] Example: Figure 1 and Figure 2 As shown, a method for installing a ship-shaped truss is described. The ship-shaped truss structure includes a ridge rhomboid truss 2, with bow trusses 5 at both ends of the ridge rhomboid truss 2. Several flowering columns 1 are provided at the lower end of the ridge rhomboid truss 2. Hull edge trusses 3, which form a ship-shaped frame structure with the ridge rhomboid truss 2, are provided on the left and right sides of the ridge rhomboid truss 2. Several hull connecting trusses 4, which are welded and fixed laterally and perpendicularly to the ridge rhomboid truss 2, are provided between the hull edge trusses 3 and the ridge rhomboid truss 2.

[0029] The aforementioned rhomboid truss 2 of the ridge includes an upper chord 9, a middle chord 10, and a lower chord 11. There are two middle chords 10, one upper chord 9, and one lower chord 11. The rhomboid truss 2 of the ridge has a rhomboid structure. A middle web member 13 is provided between the middle chords 10. An upper web member 8 is provided between the upper chord 9 and the middle chord 10. A lower web member 12 is provided between the lower chord 11 and the middle chord 10.

[0030] The installation method includes the following steps:

[0031] Step 1: Assembly of the Ridge Rhomboid Truss 2. Since the maximum assembly height of the Ridge Rhomboid Truss 2 from the floor slab is 11.67m, which is excessively high, a process of first assembling in sections on the ground and then assembling in sections at height was adopted to reduce the amount of high-altitude assembly. The assembly length of the Ridge Rhomboid Truss 2 sections is mainly between 16.5m and 33.0m. The number of assembly jigs is determined according to the number of chord segments of the Ridge Rhomboid Truss 2. Jigs are set on both sides of the middle chord and at the ends of the side chords. There are no fewer than two jigs for each section of the rhomboid truss.

[0032] The ridge rhomboid truss 2 is composed of several rhomboid trusses. Individual rhomboid truss sections are assembled piecemeal using a truck crane on the floor. Assembly follows the positioning sequence of truss middle chord 10 → truss lower chord 11 → truss lower web member 12 → truss middle web member 13 → truss upper chord 9 → truss upper web member 8. First, a jig is set up and the lower chord 11 and middle chord 10 of the ridge rhomboid truss 2 are positioned. Then, the lower web member 12 and middle web member 13 of the lower part of the ridge rhomboid truss 2 are assembled, forming a triangular truss at the bottom. Next, the upper chord 9 and upper web member 8 are installed, completing the rhomboid truss assembly process. Truss member positioning is initially achieved through spot welding and timely re-measurement. During member positioning, chord members are temporarily fixed with lugs, and web members are temporarily fixed to chord members through spot welding. To avoid stress concentration during welding, the overall welding sequence of the truss is determined to be from the middle to both sides, and the welding sequence of the chord members is to weld clockwise from two points that are 180 degrees apart.

[0033] Step 2: Use a crane to assemble the hull connecting trusses 4 on both sides of the rhomboid truss 2 of the ridge.

[0034] Step 3: The assembly of the hull edge truss 3 is carried out using a crane. The hull edge truss 3 utilizes an orthogonal square plane interlaced space frame. During the assembly of the hull edge truss 3, the jig for the lower chord spheres is first positioned to ensure accuracy control requirements. The inspected welded spheres are then placed into the installation nodes according to specifications and numbers. At the same time, the spheres should be adjusted to ensure the direction and position of the force, and the circumferential weld of the horizontal centerline of the welded spheres is placed in the equatorial direction.

[0035] Next, locate the lower chord ball positions and arrange the lower chord ball assembly frame. Then, install the lower chord members between the lower chord balls. The vertical web members are positioned and installed separately before the upper chord balls are installed. After the vertical web members are positioned, assemble the upper chord balls and upper chord members in the order of 1 ball n tubes. Assemble the upper chord balls and upper chord members on the ground in the form of two balls per member, one ball per member, one ball per two members, and one ball per three members, and then assemble them above the unit cells. Finally, add the web members between the chord members of the net frame.

[0036] Step 4: Assemble the bow truss, and then complete the assembly with the ridge rhomboid truss 2.

[0037] Step 5: Using hydraulic lifting equipment, the entire ship-shaped truss is lifted to the design elevation, completing the hoisting and support installation of the flowering column 1. The lower end of the bow truss 5 is supported by steel pipe columns 7, and a box-shaped column 6 is installed between the steel pipe column 7 and the bow truss 5. The box-shaped column 6 enhances the stability of the steel pipe column 7's support for the bow truss 5. This completes the installation process of the entire ship-shaped truss.

[0038] In summary, this method for installing ship-shaped trusses features a compact structure, high structural strength, and good stability. It solves the problem of constructing steel structures within a ship-shaped space, enabling the widespread application of ship-shaped truss structures in the construction field.

[0039] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A method of installing a boat-shaped truss, characterized by: The ship-shaped truss structure comprises a ship ridge rhombic truss (2), the ship ridge rhombic truss (2) is provided with a bow truss (5) at both ends, the lower end of the ship ridge rhombic truss (2) is provided with a plurality of flower columns (1), the left and right sides of the ship ridge rhombic truss (2) are provided with ship body edge trusses (3) which form a ship-shaped frame structure with the ship ridge rhombic truss (2), and a plurality of ship body connecting trusses (4) which are transversely and vertically welded with the ship ridge rhombic truss (2) are arranged between the ship body edge trusses (3) and the ship ridge rhombic truss (2). The ship ridge rhombic truss (2) comprises a truss upper chord (9), a truss middle chord (10) and a truss lower chord (11), the number of the truss middle chord (10) is two, and the truss upper chord (9) and the truss lower chord (11) are one, the ship ridge rhombic truss (2) is in a rhombic structure, a truss middle web (13) is arranged between the truss middle chords (10), a truss upper web (8) is arranged between the truss upper chord (9) and the truss middle chord (10), and a truss lower web (12) is arranged between the truss lower chord (11) and the truss middle chord (10). The installation method comprises the following operation steps: The first step is to assemble the ship ridge rhombic truss (2), because the assembly height of the ship ridge rhombic truss (2) is up to 11.67 m from the floor, the assembly height is too high, in order to reduce the high-altitude assembly amount of the ship ridge rhombic truss (2), the ground segmented assembly is adopted first, and then the high-altitude segmented assembly process is adopted; The second step is to assemble the ship body connecting trusses (4) on both sides of the ship ridge rhombic truss (2) by using a crane; The third step is to assemble the ship body edge trusses (3) by using a crane, and the ship body edge trusses (3) adopt the orthogonal square plane staggered net racks; The fourth step is to assemble the bow truss, and then the assembly with the ship ridge rhombic truss (2) is completed; The fifth step is to lift the whole ship-shaped truss to the design elevation position by using the hydraulic lifting equipment, the hoisting and supporting installation of the flower column (1) are completed, and the whole ship-shaped truss installation process is completed.

2. The method of installing a boat-form truss according to claim 1, wherein: The lower end of the bow truss (5) is provided with a steel pipe column (7) for supporting, a box column (6) is arranged between the middle part of the steel pipe column (7) and the bow truss (5), and the box column (6) is used to strengthen the stability of the steel pipe column (7) supporting the bow truss (5).

3. The method of installing a boat-form truss according to claim 1, wherein: The segmented assembly length of the ship ridge rhombic truss (2) is mainly 16.5 m to 33.0 m, the number of assembly jigs is set according to the segmented number of the chords of the ship ridge rhombic truss (2), the jigs are arranged on both sides of the middle chord, the jigs are arranged at the ends of the chords, and the single segmented rhombic truss jig is not less than two.

4. The method of installing a boat-form truss according to claim 3, wherein: The ship ridge rhombic truss (2) is composed of a plurality of rhombic trusses, the segmented assembly of a single rhombic truss adopts the floor scattered assembly of the automobile crane, the assembly is performed in the positioning sequence of the truss middle chord (10) → the truss lower chord (11) → the truss lower web (12) → the truss middle web (13) → the truss upper chord (9) → the truss upper web (8), the truss bar positioning is first adopted by spot welding and timely retesting, when the bar positioning is performed, the chord adopts the temporary ear plate fixing, and the web and the chord adopt the temporary fixing by spot welding.

5. A method of installing a boat-shaped truss according to claim 4, characterised in that: In order to avoid welding stress concentration, the truss overall welding sequence is determined as from the middle to both sides, and the chord butt welding sequence is clockwise welding from two points of 180 degrees.

6. The method of installing a boat-form truss of claim 4, wherein: First, the jig is laid out and the truss lower chord (11) and truss middle chord (10) of the ship ridge rhombic truss (2) are positioned, then the truss lower web member (12) and truss middle web member (13) of the lower part of the ship ridge rhombic truss (2) are assembled, so that the lower part of the ship ridge rhombic truss (2) is assembled into a triangular truss; then the truss upper chord (9) and truss upper web member (8) are installed, and the rhombic truss assembly process is completed.

7. The method of installing a boat-form truss of claim 1, wherein: When the hull edge truss (3) is assembled, the jig positioning of the lower chord ball is first performed to ensure the accuracy control requirements, the accepted welded ball is placed in the installation node according to the specifications and number, and at the same time the ball should be adjusted to the stress direction and position; then the position of the net rack lower chord ball is positioned, and the net rack assembly lower chord ball pipe jig is laid out; then the lower chord between the net rack lower chord ball is installed, the vertical web member is separately positioned and installed before the upper chord ball is installed, after the vertical web member positioning is completed, the net rack upper chord ball and upper chord are assembled in the order of 1 ball n pipe, and finally the net rack chord web member is supplemented.

8. The method of installing a boat-form truss according to claim 7, wherein: The upper chord ball and upper chord are assembled to the unit cell above after the ground assembly is completed in the form of two balls and one rod, one ball and one rod, one ball and two rods, and one ball and three rods.

9. The method of installing a boat-form truss of claim 7, wherein: The annular weld of the horizontal center line of the welded ball is placed in the equatorial direction.

Images