Manufacturing method of steel shell web plate body

Abstract

The invention discloses a manufacturing method of a steel shell web plate block body, and belongs to the technical field of bridge cable bent tower construction. The manufacturing method comprises the steps of manufacturing the wall plate units, building the base, fixing the stand columns, fixing the outer side wall plate units, fixing the inner side wall plate units, welding the connecting angle steel and conducting precise matching and cutting. The method is suitable for manufacturing construction of the steel shell web plate block body, and the problems of low construction efficiency, poor precision control, narrow operation space and the like generally existing in a bulk splicing process and a horizontal splicing process can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge tower construction, and in particular relates to a method for manufacturing a steel shell web plate body. Background Art

[0002] With the development of domestic bridge tower construction technology, thin-walled steel shell composite structure towers are increasingly used in bridge towers due to their structural advantages. Thin-walled steel shell composite structure towers give full play to the advantages of steel and concrete, and have the characteristics of high construction efficiency and low construction cost. Although my country has made great progress in the manufacture of steel towers, it still faces many manufacturing challenges in the manufacture of steel shell towers.

[0003] Steel shell belly plate Figure 1 As shown in the figure, it is an important component of the thin-walled steel shell composite structure cable tower, with the inner wall plate unit and the outer wall plate unit on both sides. Figure 2 As shown, the inner wall panel unit is similar. The inner and outer wall panels, the connecting angle steels connecting them, and the internal longitudinal and transverse stiffening ribs and steel bars together constitute the box-type steel shell web plate body. Although this complex structure has excellent structural advantages, it also brings certain difficulties to the manufacturing and construction. In the prior art, the manufacturing and construction of the steel shell web plate body is mainly based on the loose assembly or horizontal assembly of plate units in the segment: the web plate body assembled by the loose assembly process is prone to transportation deformation, there are many welds on site and the deformation is not easy to correct; the web plate body assembled by the horizontal assembly process has problems such as difficulty in positioning the wall panel unit on one side, difficulty in installing the connecting angle steel, and difficulty in construction by personnel in the small operating space. The manufacturing and construction of the steel shell web plate body under the prior art not only has low construction efficiency but also difficulty in ensuring positioning accuracy. Therefore, a new manufacturing and construction method is urgently needed. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention designs a method for manufacturing a steel shell web plate body, which can effectively solve the problems existing in the scattered assembly process and the horizontal assembly process in the prior art.

[0005] The present invention provides a method for manufacturing a steel shell web plate body, wherein the web plate body comprises an outer wall plate and an inner wall plate arranged in parallel, and a plurality of groups of transverse stiffening ribs and vertical stiffening ribs are arranged on the opposite surfaces of the outer wall plate and the inner wall plate, and the transverse stiffening ribs and the vertical stiffening ribs are vertically crossed to form a grid structure, and vertical steel bars are penetrated through the transverse stiffening ribs, and transverse steel bars are penetrated through the vertical stiffening ribs, and connecting angle steels are arranged between the opposite surfaces of the outer wall plate and the inner wall plate, and the connecting angle steels are fixed on the corresponding transverse stiffening ribs and the vertical stiffening ribs, and the method is characterized in that the method comprises the following steps: ① Lay the outer wall panel on a workbench, weld and fix the transverse stiffening ribs and the vertical stiffening ribs on the outer wall panel in order from the middle to both sides and from the inside to the outside, and penetrate and fix the vertical steel bars and transverse steel bars on the transverse stiffening ribs and the vertical stiffening ribs in order from the middle to both sides and from the inside to the outside to obtain the outer wall panel unit; use the same steps to obtain the inner wall panel unit; ② Use a theodolite to draw two mutually perpendicular ground sample lines at the installation site, and place a number of strip bases orthogonally on one of the ground sample lines, and the strip bases are fixed on the ground in parallel with each other. The number and spacing of the strip bases are determined according to the size and weight of the web plate body; ③ Two columns are symmetrically and vertically fixed on the upper end surface of each of the strip bases, and all the columns are formed into two parallel rows, and the inner side of the columns in one row is fixed with an outer wall support rib, and the outer wall support rib is arranged perpendicular to the inner side of the column; the inner side of the columns in the other row is provided with an inner wall support rib, and the inner wall support rib is arranged perpendicular to the inner side of the column and is fixedly connected to the angle steel fixed to the inner side of the column by bolts, and the bolt through hole on the angle steel is a horizontal strip hole, and the fastening position of the bolt is adjusted through the horizontal strip hole, so that the spacing between the inner wall support rib and the outer wall support rib is equal to the thickness of the web plate body; ④ Draw mutually perpendicular outer wall horizontal center lines and outer wall vertical center lines at the center position of the smooth surface of the outer wall panel unit, and mark the outer wall center horizontal baseline on a row of columns fixed with the outer wall support ribs using a theodolite and a level according to the size of the web plate body; place the smooth surface of the outer wall panel unit on the strip base close to the inner edge of the outer wall support ribs, and align the outer wall horizontal center line with the outer wall center horizontal baseline by setting pads of different heights at the bottom of the outer wall panel unit, and then fix the outer wall panel unit on the column using a buckle; ⑤ Draw a mutually perpendicular inner wall horizontal center line and inner wall vertical center line at the center position of the smooth surface of the inner wall panel unit, and mark the inner wall center horizontal baseline on another row of columns for fixing the inner wall support ribs using a theodolite and a level according to the size of the web plate body, and make the height difference between the inner wall center horizontal baseline and the outer wall center horizontal baseline equal to the height difference between the outer wall plate and the inner wall plate in the web plate body; place the smooth surface of the inner wall panel unit on the strip base close to the inner edge of the inner wall support ribs, and align the inner wall horizontal center line with the inner wall center horizontal baseline by setting pads of different heights at the bottom of the inner wall panel unit, and then use buckles to fix the inner wall panel unit on the columns; ⑥ Mark the assembly positions of the connecting angle steels on the transverse stiffening ribs and the vertical stiffening ribs, weld and fix the connecting angle steels in sequence from bottom to top, connect and fix the outer wall panel unit and the inner wall panel unit together to form the web panel body; ⑦ Loosen all clips and bolts, remove the web plate and place it on the platform, and use the horizontal center line of the outer wall, the vertical center line of the outer wall, the horizontal center line of the inner wall, and the vertical center line of the inner wall as the reference to mark the surrounding cutting position lines of the outer wall plate and the inner wall plate, perform secondary precise cutting, and obtain the finished web plate.

[0006] Furthermore, the strip-shaped base and the columns are both made of I-beams.

[0007] Furthermore, the buckle is a U-shaped buckle.

[0008] Furthermore, a support reinforcement is welded and fixed on the outer side of each column.

[0009] Compared with the prior art, the outstanding effects of the present invention are: ① The scattered assembly and horizontal assembly processes are changed to vertical assembly processes, which effectively solves the problem of narrow construction space for personnel; ② The vertical assembly process steps are simple, the web plate body precision control points are clear, and the positioning accuracy is high; ③ The vertical assembly process occupies a small area, which solves the problem of the existing assembly method occupying the total assembly site for a long time and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the abdominal plate body; Figure 2 It is a schematic diagram of the wall plate structure of the web plate body; Figure 3 It is a structural diagram of the base and the column; Figure 4 It is a schematic diagram of the connection between the inner supporting ribs and the columns; Figure 5 It is a schematic diagram of the construction of the positioning outer wall panel unit; Figure 6 It is a schematic diagram of the construction of the positioning inner wall panel unit; Figure 7 This is a schematic diagram of the construction of welding connection angle steel; Figure 8 This is a schematic diagram of the tire cutting construction. DETAILED DESCRIPTION

[0011] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0012] like Figure 1 and Figure 2As described above, the web plate body in this embodiment includes an outer wall plate 10 and an inner wall plate 20 arranged in parallel, and a plurality of groups of transverse stiffening ribs 30 and vertical stiffening ribs 40 are arranged on the opposite surfaces thereof, and the transverse stiffening ribs 30 and the vertical stiffening ribs 40 are vertically crossed to form a grid structure. The transverse stiffening ribs 30 are penetrated by vertical steel bars 50, and the vertical stiffening ribs 40 are penetrated by transverse steel bars 60. A connecting angle steel 70 is arranged between the opposite surfaces of the outer wall plate 10 and the inner wall plate 10, and the connecting angle steel 70 is fixed on the corresponding transverse stiffening ribs 30 and the vertical stiffening ribs 40.

[0013] In this embodiment, the manufacturing method is carried out in the following order: Step 1: Lay the outer wall panel 10 on a workbench, and weld and fix the transverse stiffening ribs 30 and the vertical stiffening ribs 40 on the outer wall panel 10 in the order from the middle to both sides and from the inside to the outside; and penetrate and fix the vertical steel bars 50 and the transverse steel bars 60 on the transverse stiffening ribs 30 and the vertical stiffening ribs 40 in the order from the middle to both sides and from the inside to the outside, so as to obtain the outer wall panel unit 100; and use the same steps to obtain the inner wall panel unit 200; Step 2, such as Figure 3 As shown, two mutually perpendicular ground sample lines 1-1 are drawn at the installation site using a theodolite, and four strip bases 1 are orthogonally placed on one of the ground sample lines 1-1, and the strip bases 1 are fixed on the ground in parallel with each other. The number and spacing of the strip bases 1 are determined according to the size and weight of the web plate body. In this embodiment, preferably, the number of the strip bases 1 is four and they are made of I-beams; Step three, same as Figure 3 As shown, two columns 2 are symmetrically and vertically fixed on the upper end surface of each strip base 1, and all the columns 2 form two parallel rows; the inner side of one row of columns 2 is fixed with outer wall support ribs 4, and the outer wall support ribs 4 are arranged perpendicular to the inner side of the columns 2; the inner side of the other row of columns 2 is provided with inner wall support ribs 5, and the inner wall support ribs 5 are arranged perpendicular to the inner side of the columns 2; Figure 4 As shown, the inner wall support rib plate 5 is fixedly connected to the angle steel 6 fixed to the inner side of the column 2 by bolts 6-1. The bolt holes on the angle steel 6 are horizontal strip holes. The fastening position of the bolts 6-1 is adjusted through the horizontal strip holes so that the spacing between the inner wall support rib plate 5 and the outer wall support rib plate 4 is equal to the thickness of the web plate body. It should be noted that, because the entire web plate body will produce slight deformation due to welding heating and other reasons after welding is completed, if the spacing between the inner wall support ribs 5 and the outer wall support ribs 4 is not adjustable, the web plate body will be unable to be removed from between the columns 2. Therefore, in this embodiment, the inner wall support ribs 5 do not adopt the same fixing method as the outer wall support ribs 4, but adopt the fixing method described above.

[0014] Step 4: Draw the outer wall horizontal center line 100-1 and the outer wall vertical center line 100-2 perpendicular to each other at the center position of the smooth surface of the outer wall panel unit 100, and use the theodolite and level to mark the outer wall center horizontal baseline on a row of columns 2 fixed with the outer wall support ribs 4 according to the size of the web plate body; Figure 5 As shown, the smooth surface of the outer wall panel unit 100 is placed on the strip base 1 close to the inner edge of the outer wall support rib 4, and by setting pads 7 of different heights at the bottom of the outer wall panel unit 100, the horizontal center line 100-1 of the outer wall is aligned with the horizontal base line of the center of the outer wall, and then the outer wall panel unit 100 is fixed to the column 2 using a buckle 8. Preferably, the buckle 8 is a U-shaped buckle; Step 5: Draw the inner wall horizontal center line 200-1 and the inner wall vertical center line 200-2 perpendicular to each other at the center position of the smooth surface of the inner wall plate unit 200, and mark the inner wall center horizontal baseline on the other row of columns 2 for fixing the inner wall support ribs 5 using the theodolite and level according to the size of the web plate body, and make the height difference between the inner wall center horizontal baseline and the outer wall center horizontal baseline equal to the height difference between the outer wall plate 10 and the inner wall plate 20 in the web plate body; Figure 6 As shown, the smooth surface of the inner wall panel unit 200 is placed on the strip base 1 close to the inner edge of the inner wall support rib 5, and pads 7 of different heights are arranged at the bottom of the inner wall panel unit 200 to align the inner wall horizontal center line 200-1 with the inner wall center horizontal baseline, and then the inner wall panel unit 200 is fixed to the column 2 using a buckle 8. Preferably, the buckle 8 is a U-shaped buckle; Step 6: Figure 7 As shown, the assembly positions of the connecting angle steels 70 are marked on the transverse stiffening ribs 30 and the vertical stiffening ribs 40, and the connecting angle steels 70 are welded and fixed in sequence from bottom to top to connect and fix the outer wall panel unit 100 and the inner wall panel unit 200 together to form a web panel body; Step 7: Figure 8 As shown, loosen all the buckles 8, loosen all the bolts 6-1, remove the web plate body and place it on the platform, and use the horizontal center line 100-1 of the outer wall, the vertical center line 100-2 of the outer wall, the horizontal center line 200-1 of the inner wall, and the vertical center line 200-2 of the inner wall as the reference to mark the surrounding cutting position lines of the outer wall plate 10 and the inner wall plate 20, perform secondary precise cutting, and obtain the finished web plate body.

[0015] In this embodiment, Figure 5 As shown, in order to ensure the stability of the column 2, a support stiffener 3 is welded and fixed to the outer side of each column 2.

Claims

1. A method for manufacturing a steel shell web plate body, the web plate body comprising an outer wall plate (10) and an inner wall plate (20) arranged in parallel, a plurality of groups of transverse stiffening ribs (30) and vertical stiffening ribs (40) are arranged on the opposite surfaces of the outer wall plate (10) and the inner wall plate (20), the transverse stiffening ribs (30) and the vertical stiffening ribs (40) are vertically crossed to form a grid structure, the transverse stiffening ribs (30) are penetrated by vertical steel bars (50), the vertical stiffening ribs (40) are penetrated by transverse steel bars (60), a connecting angle steel (70) is arranged between the opposite surfaces of the outer wall plate (10) and the inner wall plate (20), the connecting angle steel (70) is fixed on the corresponding transverse stiffening ribs (30) and the vertical stiffening ribs (40), characterized in that: The method comprises the following steps: ① Laying the outer wall panel (10) on a workbench, welding and fixing the transverse stiffening ribs (30) and the vertical stiffening ribs (40) on the outer wall panel (10) in sequence from the middle to both sides and from the inside to the outside, and passing and fixing the vertical steel bars (50) and the transverse steel bars (60) on the transverse stiffening ribs (30) and the vertical stiffening ribs (40) in sequence from the middle to both sides and from the inside to the outside, thereby obtaining an outer wall panel unit (100); using the same steps, obtaining an inner wall panel unit (200); ② Using a theodolite to draw two mutually perpendicular ground sample lines (1-1) at the installation site, and placing a plurality of strip bases (1) orthogonally on one of the ground sample lines (1-1), and the strip bases (1) are fixed on the ground in parallel with each other, and the number and spacing of the strip bases (1) are determined according to the size and weight of the web plate body; ③ Two columns (2) are symmetrically and vertically fixed on the upper end surface of each of the strip bases (1), and all the columns (2) are formed into two parallel rows, and the inner sides of the columns (2) in one row are all fixed with outer wall support ribs (4), and the outer wall support ribs (4) are arranged perpendicular to the inner sides of the columns (2); the inner sides of the columns (2) in the other row are all provided with inner wall support ribs (5), and the inner wall support ribs (5) are arranged perpendicular to the inner sides of the columns (2) and are fixedly connected to the angle steel (6) fixed to the inner sides of the columns (2) through bolts (6-1), and the bolt through holes on the angle steel (6) are horizontal strip holes, and the fastening position of the bolts (6-1) is adjusted through the horizontal strip holes so that the spacing between the inner wall support ribs (5) and the outer wall support ribs (4) is equal to the thickness of the web plate body; ④ At the center position of the smooth surface of the outer wall panel unit (100), draw mutually perpendicular outer wall horizontal center line (100-1) and outer wall vertical center line (100-2), and mark the outer wall center horizontal baseline on a row of columns (2) fixed with the outer wall support ribs (4) using a theodolite and a level according to the size of the web plate body; place the smooth surface of the outer wall panel unit (100) on the strip base (1) in close contact with the inner edge of the outer wall support ribs (4), and align the outer wall horizontal center line (100-1) with the outer wall center horizontal baseline by arranging pads (7) of different heights at the bottom of the outer wall panel unit (100), and then use a buckle (8) to fix the outer wall panel unit (100) on the column (2); ⑤ Draw mutually perpendicular inner wall horizontal center lines (200-1) and inner wall vertical center lines (200-2) at the center position of the smooth surface of the inner wall panel unit (200), and mark the inner wall center horizontal baseline on another row of columns (2) fixing the inner wall support ribs (5) using a theodolite and a level according to the size of the web plate body, and make the height difference between the inner wall center horizontal baseline and the outer wall center horizontal baseline equal to the height difference between the outer wall panels (10) and the inner wall panels (20) in the web plate body; place the smooth surface of the inner wall panel unit (200) on the strip base (1) in close contact with the inner edge of the inner wall support ribs (5), and align the inner wall horizontal center line (200-1) with the inner wall center horizontal baseline by setting pads (7) of different heights at the bottom of the inner wall panel unit (200), and then use buckles (8) to fix the inner wall panel unit (200) on the columns (2); ⑥ marking the assembly positions of the connecting angle steels (70) on the transverse stiffening ribs (30) and the vertical stiffening ribs (40), welding and fixing the connecting angle steels (70) in sequence from bottom to top, connecting and fixing the outer wall panel unit (100) and the inner wall panel unit (200) together, and forming the web panel body; ⑦ Loosen all the buckles (8), loosen all the bolts (6-1), remove the web plate body and place it on the platform, and use the horizontal center line (100-1) of the outer wall, the vertical center line (100-2) of the outer wall, the horizontal center line (200-1) of the inner wall, and the vertical center line (200-2) of the inner wall as a reference to mark the surrounding cutting position lines of the outer wall plate (10) and the inner wall plate (20), and perform secondary precise cutting to obtain a finished web plate body.

2. The method for manufacturing a steel shell web plate according to claim 1, characterized in that: The strip-shaped base (1) and the upright column (2) are both made of I-beams.

3. The method for manufacturing a steel shell web plate according to claim 1, characterized in that: The buckle (8) is a U-shaped buckle.

4. The method for manufacturing a steel shell web plate according to claim 1, characterized in that: A support stiffener (3) is welded and fixed to the outer side of each column (2).

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