Combined box-shaped steel sheet pile for dock wall and manufacturing method of combined box-shaped steel sheet pile

Abstract

The dock wall combined box-shaped steel sheet pile and the manufacturing method are characterized in that the steel sheet pile is composed of two Z-shaped cold-rolled steel sheet piles (1) and a U-shaped cold-rolled steel sheet pile (2) which are connected in a buckled mode, the whole steel sheet pile is of a hexagonal box-type structure, reinforcing rib plates (3) connected with opposite angles are additionally arranged in the two ends of the hexagonal box-type structure respectively, and the reinforcing rib plates (3) are connected with the U-shaped cold-rolled steel sheet pile (2). And the tops of two opposite sides are respectively provided with a hoisting hole (4). Compared with a traditional structure, materials are saved by 10%-15%, and the strength is improved by 30% or above.

Description

Technical Field

[0001] The present invention relates to a steel sheet pile manufacturing technology, especially a technology for manufacturing steel sheet piles in a dock, and specifically to a combined box-shaped steel sheet pile for a dock wall and a manufacturing method thereof. Background Art

[0002] Currently, box-shaped steel sheet piles are widely used in the process of dock construction to improve the construction speed and quality. Chinese Patent 2020113567491, a dock water stop member and its preparation and installation method, and Chinese Patent 2005100260936, a construction method for a combined box-shaped steel sheet pile for a dock wall, disclose the common steel sheet pile structures and their construction methods currently. Figure 1 This is a common structural form of existing box-shaped steel sheet piles. It is formed by splicing and welding four hot-rolled Z-shaped steel sheet piles. The hot-rolled steel sheet piles need to be heat-treated and tempered, which has a great impact on the material properties and is difficult to meet the high-strength requirements of the dock. At the same time, in the manufacturing process, the redundant locking parts need to be cut off, resulting in material waste and increased manufacturing costs, and it is difficult to meet the needs of modern dock construction. Moreover, as far as the applicant knows, both ends of the current box-shaped steel sheet piles lack corresponding stiffening rib plates and lifting holes, resulting in deformation of the insertion end and the striking end due to large forces during construction, affecting the construction progress, and must be improved. Summary of the Invention

[0003] The purpose of the present invention is to invent a combined box-shaped steel sheet pile for a dock wall and a manufacturing method thereof in view of the unreasonable structure of the existing box-shaped steel sheet piles for docks and the lack of corresponding manufacturing processes.

[0004] One of the technical solutions of the present invention is:

[0005] A combined box-shaped steel sheet pile for a dock wall, characterized in that: it is composed of two Z-shaped cold-rolled steel sheet piles 1 connected by buckling and one U-shaped cold-rolled steel sheet pile 2, and its overall shape is a hexagonal box structure. A stiffening rib plate 3 connecting the diagonals is installed inside each of the two ends of the hexagonal box structure, and a lifting hole 4 is provided at the top of each of the opposite two sides.

[0006] The length of the stiffening rib plate 3 at the top of the pile is greater than the length of the stiffening rib plate 3 at the bottom of the pile.

[0007] Another technical solution of the present invention is:

[0008] A manufacturing method of a combined box-shaped steel sheet pile for a dock wall, characterized in that it includes the following steps:

[0009] First, use a Z-shaped steel sheet pile production line to produce and manufacture Z-shaped cold-rolled steel sheet piles for standby;

[0010] Second, use a U-shaped steel sheet pile production line to produce and manufacture U-shaped cold-rolled steel sheet piles for standby;

[0011] Third, lock and fasten the Z-shaped cold-rolled steel sheet piles to form a cold-formed steel sheet pile a;

[0012] Fourth, place the cold-formed steel sheet pile a with its lock inserted on a U-shaped bench and fix it to ensure the effective width of the composite steel sheet pile;

[0013] Fifth, place the U-shaped cold-rolled steel sheet pile formed by rolling the Q355B steel plate on top of the cold-formed steel sheet pile a, position it and adjust the relative position, and perform positioning and welding. The size of the weld leg: hf = 8 mm, the effective length of the weld: L = 100 mm, weld every 2 m, and complete the initial spot welding to obtain the box structure steel sheet pile. When welding, use a CO2 shielded welding equipment for welding the welds; Sixth, within 750 mm of the lock at both the upper and lower ends of the box structure steel sheet pile, perform reciprocating electric welding inside the box. The size of the weld leg: hf = 6 mm. Within 1.5 m of the pointed feet of the U-shaped cold-rolled steel sheet pile at both the upper and lower ends of the box structure steel sheet pile, perform reciprocating electric welding inside the box. The size of the weld leg: hf = 8 mm, and complete the internal seam welding. When welding, use a CO2 shielded welding equipment for welding the welds; Seventh, use a gantry numerical control welding manipulator to perform continuous full-penetration welding on the outside of the box at the pointed feet of the U-shaped cold-rolled steel sheet pile, with a penetration depth > 8 mm. After welding is completed, check that the welded welds are qualified and then proceed to the next step;

[0014] Eighth, open lifting holes; symmetrically open lifting holes at a set distance from the pile top. The lifting holes are located on the opposite side plates; the lifting holes are 100 mm from the pile top, and the hole diameter The lifting holes are located on the outer extension lock of the box structure steel sheet pile;

[0015] Ninth, weld stiffening plates: weld stiffening plates at both the pile top and the pile tip. The size of the weld leg: hf = 12 mm; the length of the pile top stiffening plate is 500 mm, and the length of the pile tip stiffening plate is 250 mm; the inner weld should surround the outer head. After welding is completed, check that the welded welds are qualified and then proceed to the next step;

[0016] Tenth, turn over the sheet pile, and use a gantry numerical control welding manipulator to perform continuous welding of the lock of the steel sheet pile. The size of the weld leg: hf < 6 mm; after welding is completed, check that the welded welds are qualified, then remove the sheet pile, spray paint, spray markings, and stack them.

[0017] The beneficial effects of the present invention:

[0018] The cold-formed box-shaped steel sheet pile for the dock wall of the present invention is formed by butt-welding the cold-formed Z-shaped steel sheet pile a (1400×461×12) mm, the cold-formed U-shaped ribbed sheet pile b (1050×495×16) mm, the additional stiffening steel plates added to the pile top (30×990×50) mm and the pile tip (30×990×250) mm. The material is made of low-alloy high-strength structural steel Q355B. The structure of the present invention saves 10-15% of materials compared with the traditional structure, and the strength is increased by more than 30%. Brief Description of the Drawings

[0019] Figure 1 It is a cross-sectional schematic diagram of the existing box-shaped steel sheet pile for the dock.

[0020] Figure 2 It is a cross-sectional schematic diagram of the box-shaped steel sheet pile for the dock of the present invention.

[0021] Figure 3 It is a side elevation schematic diagram of the box-shaped steel sheet pile for the dock of the present invention.

[0022] Figure 4 It is a schematic diagram of the Z-shaped steel sheet pile production line of this embodiment.

[0023] Figure 5 It is a schematic diagram of the U-shaped steel sheet pile production line of this embodiment.

[0024] Figure 6 It is a schematic diagram of the installation of the cold-formed steel sheet pile a on the sheet pile processing bench of this embodiment of the present invention.

[0025] Figure 7 It is Figure 6 of the cross-sectional schematic diagram.

[0026] Figure 8 It is a schematic diagram of the assembly, spot welding and combination of the U-shaped steel sheet pile and the cold-formed steel sheet pile a of this embodiment of the present invention.

[0027] Figure 9 It is Figure 8 of the cross-sectional schematic diagram.

[0028] Figure 10 Schematic diagram of the internal welding at both ends of the box-type steel sheet pile of this embodiment of the present invention.

[0029] Figure 11 It is Figure 10 of the cross-sectional schematic diagram.

[0030] Figure 12 It is a schematic diagram of the welding of both sides of the U-shaped cold-rolled steel sheet pile and both sides of the cold-formed steel sheet pile a of this embodiment.

[0031] Figure 13 It is Figure 12 of the cross-sectional schematic diagram.

[0032] Figure 14 It is a schematic diagram of the welding state of the gantry.

[0033] Figure 15 It is a schematic diagram of opening hoisting holes and welding stiffening rib plates in the embodiment of the present invention.

[0034] Figure 16 It is Figure 15 a schematic cross-sectional view.

[0035] Figure 17 It is a schematic diagram of the welding state of the lock of the cold-formed steel sheet pile a after flipping in the embodiment of the present invention.

[0036] Figure 18 It is Figure 17 a schematic cross-sectional view. Detailed implementation manners

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] As Figure 2-18 shown.

[0039] A dock wall combined box-shaped steel sheet pile with a cross-sectional structure as Figure 2 and a side elevation structure as Figure 3 shown is composed of two Z-shaped cold-rolled steel sheet piles 1 connected by buckling and one U-shaped cold-rolled steel sheet pile 2, and its overall shape is a hexagonal box structure. A connecting diagonal stiffening rib plate 3 is additionally installed inside each end of the hexagonal box structure. The parts of the two Z-shaped cold-rolled steel sheet piles 1 extending out of the sharp corners of the U-shaped cold-rolled steel sheet pile 2 are used to connect with adjacent combined box-shaped steel sheet piles, and a hoisting hole 4 is provided on each of them. Generally speaking, the length of the stiffening rib plate 3 at the top of the pile should be greater than the length of the stiffening rib plate 3 at the bottom of the pile. As the dimensions marked in Figure 3 , the length of the stiffening rib plate at the top of the pile is 500 mm, and the length of the stiffening rib plate at the pile tip is 250 mm. The thickness of the stiffening rib plate 3 should be greater than the thickness of the main board of the pile body. The manufacturing steps of the dock wall combined box-shaped steel sheet pile of the present invention as Figure 2 and 3 shown are as follows:

[0040] First, use the Z-shaped steel sheet pile production line to produce and manufacture the Z-shaped cold-rolled steel sheet pile for standby; it can be directly manufactured with reference to Chinese Patent 2010101882398, "Roll-type continuous cold bending forming manufacturing method of Z-shaped steel sheet piles", or it can also be adopted as Figure 4The equipment and steps shown are as follows: After the steel coil is uncoiled by the loading machine, it is leveled by the leveling machine. Then it is rolled by the forming mills in Unit 1, namely K1, K2, K3, K4, K5, for 5 passes of forming rolling, by the forming mills in Unit 2, namely K6, K7, K8, K9, K10, for 5 passes of forming rolling, and by the forming mills in Unit 3, namely K11, K12, K13, for 3 passes of cold bending forming rolling. It is straightened by the K14 straightening equipment, cut according to the required length, sprayed with identification, and stacked for standby.

[0041] Secondly, produce and make U-shaped cold-rolled steel sheet piles for standby using the U-shaped steel sheet pile production line; it can be directly manufactured with reference to the Chinese patent 2010101882364 "Roll-type continuous cold bending forming manufacturing method for U-shaped steel sheet piles", or it can also be manufactured with reference to Figure 5 the equipment and steps shown: After the steel coil is uncoiled by the loading machine, it is leveled by the leveling machine. Then it is rolled by the cold bending forming mills K1, K2, K3, K4, K5, K6 for 6 passes, straightened by the K7 straightening equipment, cut according to the required length, and stacked for standby.

[0042] Thirdly, lock and fasten the Z-shaped cold-rolled steel sheet piles to form cold-formed steel sheet piles a;

[0043] Fourthly, place the cold-formed steel sheet piles a of SLZ28-700 (Z27-700) with the locks already inserted on the U-shaped bench 5 and fix them to ensure the effective width of the combined steel sheet piles, such as Figure 6 、 7 ;

[0044] Fifthly, place the U-shaped cold-rolled steel sheet piles that have been roll-formed from Q355B steel plates on top of the cold-formed steel sheet piles a, position and adjust their relative positions, and carry out positioning welding. The fillet weld size: hf = 8mm, the effective length of the weld L = 100mm, and weld one place every 2m to complete the initial spot welding combination to obtain the box-shaped structural steel sheet piles. When welding, use a CO2 shielded welding equipment for welding the welds; such as Figure 8 、 9 ;

[0045] Sixthly, carry out reciprocating electric welding inside the box within 750mm at the lock joints at both ends of the box-shaped structural steel sheet piles. The fillet weld size of the weld: hf = 6mm, and carry out reciprocating electric welding inside the box within 1.5m at the pointed feet of the U-shaped cold-rolled steel sheet piles at both ends of the box-shaped structural steel sheet piles. The fillet weld size of the weld: hf = 8mm to complete the internal seam welding. When welding, use a CO2 shielded welding equipment for welding the welds; such as Figure 10 、 11 ,

[0046] Seventhly, use the gantry numerical control welding manipulator 6 (CO2 shielded) to carry out continuous full-penetration welding on the outside of the box at the pointed feet of the U-shaped cold-rolled steel sheet piles. The penetration depth > 8mm. After welding is completed, check that the welded seams are qualified and then proceed to the next step;Figure 12 , 13 , 14;

[0047] Eighth, open lifting holes 4; symmetrically open lifting holes at a set distance from the pile top, and the lifting holes are located on the opposite side plates; the lifting holes are 100 mm from the pile top, and the hole diameter The lifting holes are located on the extension locking buckle of the box structure steel sheet pile; as Figure 15 , 16 ; Ninth, weld stiffening plates: weld stiffening plates at both the pile top and the pile tip, weld leg size: hf = 12 mm; the length of the pile top stiffening plate is 500 mm, and the length of the pile tip stiffening plate is 250 mm; as Figure 15 , 16 ; The inner weld should surround the outer head. After welding is completed, check that the welded seam is qualified before proceeding to the next step;

[0048] Tenth, turn over the sheet pile and use a gantry numerical control welding manipulator to weld the locking mouth of the steel sheet pile throughout its length, weld leg size: hf < 6 mm, as Figure 17 , 18 ; The area within a set range (10.5 m) at the top of the sheet pile should be ground flat with the flange of the sheet pile. After welding is completed, check that the welded seam is qualified, then remove the sheet pile, spray paint, spray markings, and stack them.

[0049] Parts not involved in the present invention are the same as or can be implemented using the prior art.

Claims

1. A combined box-shaped steel sheet pile for dock wall, characterized in that: It is composed of two Z-shaped cold-rolled steel sheet piles (1) connected by snap-fastening and one U-shaped cold-rolled steel sheet pile (2), and its overall shape is a hexagonal box structure. A reinforcing rib plate (3) connecting the diagonals is installed inside each of the two ends of the hexagonal box structure, and a lifting hole (4) is provided at the top of each of the opposite two sides.

2. The combined box-shaped steel sheet pile for dock wall according to claim 1, characterized in that: The length of the reinforcing rib plate (3) at the top of the pile is greater than the length of the reinforcing rib plate (3) at the bottom of the pile.

3. A manufacturing method of the steel sheet pile according to claim 1, characterized in that it It includes the following steps: First, use the Z-shaped steel sheet pile production line to produce and manufacture the Z-shaped cold-rolled steel sheet pile for standby; Second, use the U-shaped steel sheet pile production line to produce and manufacture the U-shaped cold-rolled steel sheet pile for standby; Third, lock and fasten the Z-shaped cold-rolled steel sheet piles to form a cold-formed steel sheet pile a; Fourth, place the cold-formed steel sheet pile a with the inserted lock on the U-shaped bench and fix it to ensure the effective width of the combined steel sheet pile; Fifth, place the U-shaped cold-rolled steel sheet pile on top of the cold-formed steel sheet pile a, position it and adjust the relative position; Sixth, within the set range at the lock joints at the upper and lower ends of the box-shaped structure steel sheet pile, perform reciprocating electric welding inside the box. Within the set range at the pointed feet of the U-shaped cold-rolled steel sheet pile at the upper and lower ends of the box-shaped structure steel sheet pile, perform reciprocating electric welding inside the box to complete the internal seam welding; Seventh, use the gantry numerical control welding manipulator to perform full-length continuous penetration welding on the outside of the box at the pointed feet of the U-shaped cold-rolled steel sheet pile. After welding is completed, check that the welding seam is qualified and proceed to the next step; Eighth, open the lifting holes; symmetrically open the lifting holes at a set distance from the top of the pile, and the lifting holes are located on the opposite two wing plates; Ninth, weld the reinforcing rib plates: weld the reinforcing rib plates at the top and the tip of the pile; the inner weld seam should surround the outer side and the head. After welding is completed, check that the welding seam is qualified and proceed to the next step; Tenth, turn over the steel sheet pile, and use the gantry numerical control welding manipulator to perform full-length welding on the lock of the steel sheet pile; after welding is completed, check that the welding seam is qualified, then remove the steel sheet pile, spray paint, spray the logo, and stack it.

4. The method according to claim 3, characterized in that: The suspension hole is 100 mm from the pile top, and the hole diameter 5. The method according to claim 3 or 4, characterized in that: The lifting holes are located on the outer extension lock of the box-shaped structure steel sheet pile.

6. The method according to claim 3, characterized in that: The fillet weld size for positioning and welding: hf = 8mm, the effective length of the weld L = 100mm, and weld one place every 2m.

7. The method according to claim 3, characterized in that: Within 750mm at the lock joints at the upper and lower ends of the box-shaped structure steel sheet pile, perform reciprocating electric welding inside the box, and the fillet weld size of the weld: hf = 6mm. Within 1.5m at the pointed feet of the U-shaped cold-rolled steel sheet pile at the upper and lower ends of the box-shaped structure steel sheet pile, perform reciprocating electric welding inside the box, and the fillet weld size: hf = 8mm to complete the internal seam welding.

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