A processing method for bottom clamp for assembled pile cap construction

Abstract

The present invention discloses a method for processing a bottom clamp for assembled pile cap construction, comprising the following steps: 1) selection of a mold; 2) selection of clamp material; 3) clamp processing; 4) selection and cutting of annular plugging plates; 5) welding of plugging plates; 6) welding and cutting of connecting bolts; 7) grouting. When the bottom clamp of the present invention is used in assembled pile cap construction, it is easy and efficient to install (a single group can install 12 sets per day, and under the influence of the moisture level), and the grouting effect is good.

Description

Technical Field

[0001] The invention relates to a method for processing a bottom sealing hoop for assembled pile cap construction. Background Art

[0002] At present, in the construction of supporting wharf projects for coal-fired power plants, oil products, heavy goods wharfs and coal unloading wharfs all adopt high pile beam-slab structures, such as Figure 1 As shown, the lower structure is steel pipe pile 2; the upper structure is mainly prefabricated and installed, including prefabricated pile cap 3, prefabricated longitudinal and transverse beams 4 (or prefabricated mooring components 1), prefabricated panels 6 and cast-in-place surface layer 5 from bottom to top. Among them, the prefabricated pile cap 3 is buried with 4 φ32mm supporting steel bars during prefabrication. The supporting steel bars are located on the top of the steel pipe pile 2 during installation. After the position and elevation of the pile cap are adjusted, it can be welded and fixed. Figure 2 As shown, a gap 7 of 5 to 10 cm is usually provided between the installation reserved hole of the prefabricated pile cap 3 and the outer wall of the steel pipe pile 2, which is used to facilitate the installation and adjustment of the pile cap.

[0003] When pouring the pile core concrete, the gap 7 between the installation reserved hole of the prefabricated pile cap 3 and the outer wall of the steel pipe pile 2 needs to be sealed. Formwork support is often used on site, but the efficiency of formwork support and removal is low and the construction is restricted by tides, which seriously affects the installation progress. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a method for processing a bottom sealing clamp for assembled pile cap construction. The clamp is simple to process, uses less materials, is convenient and quick to support and dismantle, has good bottom sealing and grouting stopping effects, and has a high reuse rate.

[0005] In order to achieve the above object, the present invention adopts a method for processing a bottom clamp for assembled pile cap construction, comprising the following steps:

[0006] 1) Selection of jig: Use the cut steel pipe pile head as the jig for the clamp processing. If the steel pipe pile is a straight pile, use it directly. If the steel pipe pile is an inclined pile, grind the pile head cut to make it smooth, and weld the supporting steel bars required in the clamp processing process;

[0007] 2) Selection of hoop material: The hoop is made of 3mm thick thin steel plate. The straight pile hoop is cut into 10cm wide thin steel strips, and the inclined pile hoop is cut into 33cm wide thin steel strips;

[0008] 3) Hoop processing: Place the long side of one side of the thin steel strip around the hoop processing jig and place it on the jig support steel bar, ensuring that the bottom edge of the thin steel strip is at the same height as the jig support steel bar and are in the same plane; then, spot weld the short side of one end to the outer surface of the jig, and bend the thin steel plate around the jig from this end, and make the thin steel plate fit tightly with the jig. After they are tightly attached, spot weld the upper and lower edges of the hoop to the steel pipe pile, and finally form a closed circular ring spot welded on the jig;

[0009] 4) Material selection and cutting of annular plugging plate: The annular plugging plate is made of 5mm thick steel plate and the annular width is 10cm;

[0010] 5) Sealing plate welding: align the leveled annular sealing plate with the top surface of the bent hoop on the mold, and weld the sealing plate and the hoop along the inner ring of the annular ring;

[0011] 6) Welding and cutting of connecting bolts: After the welding of the pile cap bottom hoop is completed, two groups of 10cm*10cm*5mm square connecting plates are welded symmetrically about the center of the hoop. Each group of connecting plates (2 pieces per group) is connected by bolts;

[0012] 7) Stop grouting: Before installing the plugging plate, stick a foam stop grouting strip along the outer ring of the plugging plate;

[0013] In the step 1), the supporting steel bars used are

[0014] In the step 5), a 10cm*10cm*5mm triangular stiffening plate is welded on the outside of the blocking plate and the hoop;

[0015] In step 6), each set of connecting plates is connected by two sets of M12 bolts. After the connecting plates are welded, the clamps and the sealing plates are cut into two halves along the center line of the connecting plates.

[0016] Compared with the prior art, the bottom clamp of the present invention is easy and efficient to install when used in the construction of assembled pile caps (12 sets can be installed per day in a single group, and under the influence of the moisture level), and has a good grout-stopping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an existing high-pile beam-slab;

[0018] Figure 2 It is a schematic diagram of the connection structure between the existing prefabricated pile cap and the steel pipe pile;

[0019] Figure 3 This is a flow chart of the bottom sealing hoop processed by the inclined pile in the present invention; in the figure, (a) pile head cutting, (b) pile head cut grinding and flattening and supporting steel bar welding, (c) plugging plate setting, (d) hoop processing and welding, (e) hoop ringing, (f) hoop cutting and shaping, (g) plugging plate welding;

[0020] Figure 4 This is a flow chart of the present invention using straight piles to process the bottom clamp; in the figure, (a) the pile head is cut, (b) the bottom tire is set, (c) the clamp processing and welding, and (d) the sealing plate and the connecting plate are welded;

[0021] Figure 5It is a structural schematic diagram of the bottom clamp for processing the inclined pile in the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the bottom clamp of the present invention;

[0023] In the figure: 1. Prefabricated mooring components, 2. Steel pipe piles, 3. Prefabricated pile caps, 4. Prefabricated longitudinal and transverse beams, 5. Cast-in-place surface layer, 6. Prefabricated panels, 7. Gap, 8. Support steel bars, 9. Thin steel plates, 10. Stiffening plates, 11. M12 bolts, 12. Sealing plates, 13. Stop slurry strips, 14. Geotextile. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] A method for processing a bottom clamp for assembled pile cap construction comprises the following steps:

[0026] 1) Selection of jig: Use the cut steel pipe pile head as the jig for the clamp processing. If the steel pipe pile is a straight pile, use it directly. If the steel pipe pile is an inclined pile, grind the pile head cut to make it smooth, and weld the supporting steel bars required in the clamp processing process;

[0027] 2) Selection of hoop material: The hoop is made of 3mm thick thin steel plate. The straight pile hoop is cut into 10cm wide thin steel strips, and the inclined pile hoop is cut into 33cm wide thin steel strips;

[0028] 3) Hoop processing: Place the long side of one side of the thin steel strip around the hoop processing jig and place it on the jig support steel bar, ensuring that the bottom edge of the thin steel strip is at the same height as the jig support steel bar and are in the same plane; then, spot weld the short side of one end to the outer surface of the jig, and bend the thin steel plate around the jig from this end, and make the thin steel plate fit tightly with the jig. After they are tightly attached, spot weld the upper and lower edges of the hoop to the steel pipe pile, and finally form a closed circular ring spot welded on the jig;

[0029] 4) Material selection and cutting of annular plugging plate: The annular plugging plate is made of 5mm thick steel plate and the annular width is 10cm;

[0030] 5) Sealing plate welding: align the leveled annular sealing plate with the top surface of the bent hoop on the mold, and weld the sealing plate and the hoop along the inner ring of the annular ring;

[0031] 6) Welding and cutting of connecting bolts: After the welding of the pile cap bottom hoop is completed, two groups of 10cm*10cm*5mm square connecting plates are welded symmetrically about the center of the hoop. Each group of connecting plates (2 pieces per group) is connected by bolts;

[0032] 7) Stop grouting: Before installing the plugging plate, stick a foam stop grouting strip along the outer ring of the plugging plate.

[0033] In the step 1), the supporting steel bars used are

[0034] In the step 5), a triangular stiffening plate of 10cm*10cm*5mm is welded on the outside of the sealing plate and the clamp.

[0035] In step 6), each set of connecting plates is connected by two sets of M12 bolts. After the connecting plates are welded, the clamps and the sealing plates are cut into two halves along the center line of the connecting plates.

[0036] Example 1

[0037] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a method for processing a bottom clamp for assembled pile cap construction includes the following steps:

[0038] 1) Tire selection

[0039] The cut steel pipe pile head is used as a mold for the clamp processing. The straight pile is used directly; the cut of the inclined pile head is polished and smooth, and the supporting steel bar 8 required in the clamp processing is welded. The supporting steel bar 8 is made of

[0040] 2) Selection of clamp material

[0041] In order to ensure that the hoop is easy to bend, the hoop material is a 3mm thick thin steel plate 9. The straight pile hoop needs to be cut into 10cm wide thin steel plate strips, and the inclined pile hoop needs to be cut into 33cm wide thin steel plate strips.

[0042] 3) Hoop processing

[0043] The long side of one side of the thin steel plate 9 is processed around the clamp and placed on the clamp support steel bar, ensuring that the bottom edge of the thin steel plate strip is at the same height as the clamp support steel bar and is in the same plane; then, the short side of one end is spot welded to the outer surface of the clamp, and the thin steel plate 9 is bent around the clamp from this end, and the thin steel plate 9 is closely fitted to the clamp. After being tightly fitted, the upper and lower edges of the clamp are spot welded to the steel pipe pile 2, and finally a closed circular ring spot welded on the clamp is formed. The oblique pile also needs to cut the excess part along the top surface of the bottom tire (which can be used as the next clamp material);

[0044] 4) Material selection and cutting of annular plugging plate

[0045] In order to ensure that the bottom sealing plate has sufficient rigidity during the pouring of the pile core concrete, the sealing plate 12 is made of 5mm thick steel plate. Since the maximum width of the gap 7 between the reserved hole wall of the pile cap and the outer wall of the steel pipe pile 2 is 10cm, the wide band of the annular sealing plate is set to 10cm. In addition, the inclined pile needs to be Figure 3 (c) The pile head auxiliary setting out shown in FIG. 1 is performed by using a plasma cutting machine / gas cutting to cut the annular plugging plate. Since the thickness of the steel plate is too small and the deformation due to heat is serious, the cut annular plugging plate needs to be manually leveled first;

[0046] 5) Sealing plate welding

[0047] Align the leveled plugging plate 12 with the top surface of the bent hoop on the mold, and weld the plugging plate and the hoop along the inner ring. To ensure the rigidity of the plugging plate 12, weld a 10cm*10cm*5mm triangular stiffening plate 10 between the plugging plate 12 and the outer side of the hoop;

[0048] 6) Welding and cutting of connecting bolts

[0049] After the welding of the pile cap bottom hoop is completed, two groups of 10cm*10cm*5mm square connecting plates are welded symmetrically about the center of the hoop. Each group of connecting plates (two pieces per group) is provided with two sets of M12 bolts for connection. After the welding of the connecting plates is completed, the hoop and the plugging plate 12 are cut into two halves along the center line of each group of connecting plates for easy installation;

[0050] 7) Measures to stop slurry

[0051] In order to prevent the cement slurry from overflowing along the edge of the blocking plate 12 during the concrete pouring process, a foam type grout stop strip 13 is pasted along the outer ring of the blocking plate 12 before the blocking plate 12 is installed;

[0052] 8) Anti-corrosion coating protection measures for steel pipe piles

[0053] In order to prevent the anti-corrosion coating of the steel pipe pile 2 from being damaged during the installation of the pile cap bottom clamp, two layers of geotextile 14 are wrapped on the inner side of the clamp before installation.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing a bottom clamp for assembled pile cap construction, characterized in that: The following steps are involved: 1) Selection of jig: The cut steel pipe pile head is used as the jig for the hoop processing. The steel pipe pile is an inclined pile, the pile head cut is polished and smooth, and the jig support steel bars required in the hoop processing process are welded on the jig for the hoop processing; 2) Selection of hoop material: The hoop is made of 3mm thick thin steel plate, and the inclined pile hoop is cut into 33cm wide thin steel strips; 3) Hoop processing: Place the long side of one side of the thin steel strip around the hoop processing jig and place it on the jig support steel bar, ensuring that the bottom side of the thin steel strip is at the same height as the jig support steel bar and both are in the same plane; then, spot weld the short side of one end of the thin steel strip to the outer surface of the hoop processing jig, and bend the thin steel strip around the hoop processing jig from this end, and make the thin steel strip fit tightly with the hoop processing jig, and then spot weld the upper and lower edges of the hoop to the steel pipe pile, and finally form a closed circular ring spot welded on the hoop processing jig; 4) Material selection and cutting of annular plugging plate: The annular plugging plate is made of 5mm thick steel plate with an annular width of 10cm; 5) Sealing plate welding: align the leveled annular sealing plate with the top surface of the bent hoop on the jig, and weld the sealing plate and the hoop along the inner ring of the hoop; 6) Welding and cutting of connecting bolts: After the welding of the pile cap bottom hoop is completed, two groups of 10cm*10cm*5mm square connecting plates are welded symmetrically about the center of the hoop. Two square connecting plates constitute a group of connecting plates, and each group of connecting plates is connected by bolts. After the welding of the connecting plates is completed, the hoop and the plugging plate are cut into two halves along the center line of the connecting plates; 7) Stop grouting: Before installing the plugging plate, stick a foam stop grouting strip along the outer ring of the plugging plate; In the step 1), the supporting steel bars used are Ø12mm*10cm; In the step 5), a 10cm*10cm*5mm triangular stiffening plate is welded on the outside of the blocking plate and the hoop; In step 6), each set of connecting plates is connected using two sets of M12 bolts.

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