Static pressure pile splicing device

Abstract

The invention discloses a static pressure pile splicing device which comprises a plug piece, an adapter barrel, a socket piece and a prestressed steel bar. The adapter barrel, the socket piece and the prestressed steel bar are embedded in a static pressure pile and located at the axis position. The socket piece comprises an outer barrel and an inner barrel, the opening of the outer barrel faces upwards, limiting plates are distributed on the outer barrel, and meshing teeth are distributed on the inner barrel; the upper and lower ends of the prestressed steel bar are respectively connected with the inner cylinder and the adapter cylinder in a tensioning manner; the upper end of the prestressed steel bar is provided with a thorn head; the plug piece comprises an insertion cylinder with a downward opening and a bag body containing quick-drying glue, clamping plates are distributed on the outer wall of the middle of the insertion cylinder, and the lower portion of the insertion cylinder is sectioned through interval seams and provided with meshing teeth; after splicing, the adjacent static pressure piles abut against each other, the upper portion of the inserting cylinder is in threaded connection with the adapter cylinder, the lower portion of the inserting cylinder is inserted into the outer cylinder and expanded along the inner cylinder to enable the meshing teeth of the inserting cylinder and the outer cylinder to be meshed with each other, the clamping plate is lapped on the inner side of the limiting plate, and the puncture head punctures the bag body to enable the space and the gap to be filled with the quick-drying glue. According to the device, the butt joint perpendicularity can be guaranteed, and the tensile and shear-resistant capacity is improved.

Description

Technical Field

[0001] The invention belongs to the field of building prefabrication assembly construction, and in particular relates to a static pressure pile splicing device. Background Art

[0002] Prefabricated static pressure piles are standardized, modularized, and integrated, which can ensure the structural quality and shorten the construction period to a great extent. Therefore, they are used more and more widely. When assembling static pressure piles, the verticality and connection strength of the splicing must be strictly guaranteed. If the verticality deviation is large or the connection strength is poor, the construction quality of the entire static pressure pile cannot be guaranteed, which is prone to major hidden dangers.

[0003] At present, traditional static pressure piles are spliced ​​by welding steel plates, which not only has high requirements for welding, but also will cause stress concentration, and it is difficult to control the docking quality and verticality. Some static pressure piles are spliced ​​by high-strength bolts. The shear force and tension are all borne by the high-strength bolts, and there will be stress concentration at the high-strength bolts. Not only is the installation requirement for the high-strength bolts high, but the tensile and shear resistance values ​​are relatively dispersed, and the tensile and shear resistance capabilities are limited. Summary of the invention

[0004] The object of the present invention is to provide a static pressure pile splicing device, which can ensure the verticality of the butt joint and improve the tensile and shear resistance.

[0005] The technical solution adopted by the present invention is: A static pressure pile splicing device comprises a plug part, a transfer tube pre-buried in the static pressure pile and located at the axial position, a socket and a prestressed steel rod; the opening of the transfer tube faces downward and is flush with the lower end surface of the static pressure pile, and the inner wall is provided with threads; the socket comprises an outer tube and an inner tube both of which are truncated cone-shaped with a small top and a large bottom; the opening of the outer tube faces upward and is flush with the upper end surface of the static pressure pile, and a limit plate is distributed at the opening of the inner wall, and the lower part of the limit plate forms an angle with the outer tube; the inner tube is fixedly connected to the axial center of the inner bottom surface of the outer tube and the upper end is closed, and the outer wall is provided with downward-facing engaging teeth; the upper and lower ends of the prestressed steel rod are respectively tightly connected with the inner tube and the transfer tube, and the upper end of the prestressed steel rod is provided with a thorn head, The thorn head is outside the inner tube and inside the outer tube; the plug component includes an insert tube with an opening facing downward and a capsule containing quick-drying glue, the upper outer wall of the insert tube is threaded, the middle outer wall is distributed with a clamping plate, the lower part is divided into petals by a spacing seam and upward-facing engaging teeth are distributed on the inner wall, the upper part of the clamping plate forms an angle with the insert tube, and the capsule is located in the upper inner part of the insert tube; after splicing, the butt-jointed end faces of adjacent static pressure piles are butted together, the upper part of the insert tube is threadedly connected to the adapter tube, the lower part is inserted into the outer tube and expanded along the inner tube so that the engaging teeth of the two are engaged with each other, the clamping plate is placed on the inner side of the limit plate, and the thorn head pierces the capsule so that the quick-drying glue fills the space between the outer tube and the inner tube and the gap of the butt-jointed end faces.

[0006] Preferably, anchor heads are provided at the upper and lower ends of the prestressed steel rod. The upper anchor head of the prestressed steel rod abuts against the outer side of the upper end of the inner tube, and the lower anchor head abuts against the inner side of the upper end of the transition tube. The prestressed steel rod tensions the transition tubes and sockets at both ends, and then pours concrete and maintains to obtain static pressure piles.

[0007] Preferably, the bottom surface of the capsule body is bonded to the inner wall of the insert tube around four sides.

[0008] Preferably, a torsion spring is provided between the clamping plate and the inserting tube, and the torsion spring keeps the clamping plate unfolded in the initial state.

[0009] Preferably, the engaging teeth on the inserting tube and the inner tube are arranged in layers along the axial direction.

[0010] Preferably, during splicing, a limit ring is placed in the adapter tube, and the limit ring abuts between the outer side of the upper end of the insert tube and the inner side of the upper end of the adapter tube.

[0011] Preferably, the outer wall of the outer cylinder is provided with a reinforcement ring at the opening.

[0012] Preferably, the side tapers of the inner cylinder and the outer cylinder are the same.

[0013] Preferably, the lower portion of the insert is divided into two halves by two spaced seams.

[0014] Preferably, four groups of clamping plates and limiting plates are evenly distributed around the axis.

[0015] The beneficial effects of the present invention are: When splicing, first install the plug piece on the adapter tube by thread, then align and insert the plug piece into the socket below, and when the butt end faces of adjacent static pressure piles are butted together, they are butted in place. At this time, since the adapter tube and the socket are both at the axis, that is, the insert tube and the inner tube are also at the axis, and the insert tube bites on the inner tube, the verticality of the butt can be guaranteed. After splicing, the butt end faces of adjacent static pressure piles are tightly butted together by the deadweight and static pressure of the static pressure piles, and the bite teeth of the insert tube and the inner tube bite each other, which can play a role in resisting tension and shearing. In addition, the card plate is placed on the inner side of the limit plate, and the two can also play a role in hindering when receiving tension, which enhances the tensile effect. In addition, the quick-drying glue fills the space between the outer tube and the inner tube and the gap of the butt end face, which not only enhances the stability and integrity of the splicing, but also plays a role in waterproofing and anti-corrosion protection of the splicing area, and improves the tensile and shearing resistance. The prestressed steel rods of the device tighten and connect the adapter tube and the socket at both ends, so that the adapter tube, the socket and the prestressed steel rods are stressed as a whole, which not only improves the anchoring strength of the adapter tube and the socket, but also further improves the tensile and shear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the installation of the adapter tube at the lower end of the static pressure pile in an embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the installation of the socket on the upper end of the static pressure pile in an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of a plug component in an embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of the installation of the prestressed steel rod, the adapter tube and the plug member in the embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the static pressure pile splicing device after splicing in an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of important dimensional parameters of the socket and the plug in the embodiment of the present invention.

[0022] In the figure: 1-prestressed steel rod; 2-anchor head; 3-adapter tube; 4-static pile; 5-reinforcement ring; 6-limiting plate; 7-thorn head; 8-outer tube; 9-biting teeth; 10-inner tube; 11-insertion tube; 12-bladder; 13-torsion spring; 14-spacer gap; 15-clamping plate; 16-limiting ring. DETAILED DESCRIPTION

[0023] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0024] This embodiment discloses a static pressure pile splicing device, such as Figures 1 to 5 As shown, it includes a transfer tube 3, a socket, a prestressed steel rod 1 and a plug; wherein: the transfer tube 3 is pre-buried in the static pressure pile 4, the opening of the transfer tube 3 faces downward and is flush with the lower end surface of the static pressure pile 4, and the inner wall has threads, see Figure 1 , Figure 4 and Figure 5 The socket is embedded in the static pressure pile 4, and the socket includes an outer cylinder 8 and an inner cylinder 10. The outer cylinder 8 is in the shape of a truncated cone with a small top and a large bottom. The opening of the outer cylinder 8 faces upward and is flush with the upper end surface of the static pressure pile 4. The inner wall is distributed with a limit plate 6 at the opening. The lower part of the limit plate 6 forms an angle with the outer cylinder 8. The inner cylinder 10 is in the shape of a truncated cone with a small top and a large bottom. The inner cylinder 10 is fixedly connected to the inner bottom surface of the outer cylinder 8 at the axis center and the upper end is closed. The outer wall is distributed with downward-facing bite teeth 9, see Figure 2 and Figure 5 The prestressed steel rod 1 is embedded in the static pile 4, and the upper and lower ends of the prestressed steel rod 1 are respectively connected to the inner tube 10 and the adapter tube 3 by tension. The upper end of the prestressed steel rod 1 has a thorn head 7, which is located outside the inner tube 10 and inside the outer tube 8. Figure 1 , Figure 2 , Figure 4 and Figure 5The plug member includes an insert tube 11 and a capsule 12, the insert tube 11 opens downward, the upper outer wall of the insert tube 11 is threaded, the middle outer wall is provided with a card plate 15, the lower part is divided by a spacer slit 14 and the inner wall is provided with upwardly facing engaging teeth 9, the upper part of the card plate 15 forms an angle with the insert tube 11, and the capsule 12 contains quick-drying glue (the quick-drying glue will not react in the capsule 12, and after the capsule 12 is punctured, the quick-drying glue flows into the outer tube 8 and begins to react and solidify), the capsule 12 is located in the upper part of the insert tube 11, see Figures 3 to 5 .

[0025] When splicing: Figure 4 As shown, the plug is first threadedly installed on the adapter tube 3, and then (using the static pressure pile 4 machine) the plug is aligned and inserted into the socket below. When the butt-jointed end faces of the adjacent static pressure piles 4 are butted together, the butt joint is in place. At this time, since the adapter tube 3 and the socket are both at the axis, that is, the insert tube 11 and the inner tube 10 are also at the axis, and the insert tube 11 is engaged with the inner tube 10, the verticality of the butt joint can be guaranteed.

[0026] After splicing: Figure 5 As shown, the butt-jointed end faces of adjacent static pressure piles 4 are butted together, the upper portion of the insert tube 11 is threadedly connected to the adapter tube 3, the lower portion is inserted into the outer tube 8 and expanded along the inner tube 10 so that the meshing teeth 9 of the two mesh with each other, the clamping plate 15 is placed on the inner side of the limit plate 6, and the piercing head 7 pierces the capsule 12 so that the quick-drying glue fills the space between the outer tube 8 and the inner tube 10 and the gap of the butt-jointed end faces.

[0027] After splicing, the butt joint end faces of adjacent static pressure piles 4 are tightly pressed together by the deadweight and static pressure of the static pressure piles 4, and the interlocking teeth 9 of the insert tube 11 and the inner tube 10 interlock with each other, which can play a role in resisting tension and shearing. In addition, the clamping plate 15 is placed on the inner side of the limit plate 6, and the two can also play a role in blocking when receiving tension, thereby enhancing the effect of resisting tension. In addition, the quick-drying glue fills the space between the outer tube 8 and the inner tube 10 and the gap of the butt joint end faces, which not only enhances the stability and integrity of the splicing, but also plays a role in waterproofing and anti-corrosion of the splicing area, thereby improving the tensile and shearing resistance. The prestressed steel rod 1 of the device tightens the adapter tube 3 and the socket at both ends, so that the adapter tube 3, the socket and the prestressed steel rod 1 are stressed as a whole, which not only improves the anchoring strength of the adapter tube 3 and the socket, but also further improves the tensile and shearing resistance.

[0028] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, in this embodiment, preferably, anchor heads 2 are provided at the upper and lower ends of the prestressed steel rod 1, the upper anchor head 2 of the prestressed steel rod 1 abuts against the outer side of the upper end of the inner tube 10, and the lower anchor head 2 abuts against the inner side of the upper end of the transition tube 3. The prestressed steel rod 1 tensions the transition tubes 3 and the sockets at both ends, then casts concrete and maintains to obtain static pressure piles 4, ensuring that the transition tube 3, the socket and the prestressed steel rod 1 are stressed as a whole, thereby improving the tensile and shear resistance.

[0029] like Figures 3 to 5 As shown, in this embodiment, preferably, the bottom surface of the capsule 12 is bonded to the inner wall of the insert tube 11 on all sides. This temporary fixing method can prevent it from falling off prematurely.

[0030] like Figures 3 to 5 As shown, in this embodiment, preferably, a torsion spring 13 is provided between the card plate 15 and the insertion tube 11. In the initial state, the torsion spring 13 keeps the card plate 15 unfolded. The outer tube 8 is narrow at the top and wide at the bottom. When the card plate 15 passes through the outer tube 8, it will be squeezed first and then unfolded. Although the material (metal) of the card plate 15 itself is elastic and can be restored to a certain extent after being squeezed, in order to ensure safety, a torsion spring 13 can be added to enable it to be forced to resume unfolding.

[0031] like Figures 2 to 5 As shown, in this embodiment, preferably, the engaging teeth 9 on the inserting tube 11 and the inner tube 10 are arranged in layers along the axial direction, and the multi-layer engagement can ensure the effects of tensile and shear resistance.

[0032] like Figure 4 and Figure 5 As shown, in this embodiment, preferably, during splicing, a limit ring 16 is placed in the adapter tube 3, and the limit ring 16 is abutted between the outer side of the upper end of the insert tube 11 and the inner side of the upper end of the adapter tube 3. The limit ring 16 can control the installation depth of the insert tube 11 on the adapter tube 3 so that it can be installed in place at one time.

[0033] As 2 and Figure 5 As shown, in this embodiment, preferably, a reinforcement ring 5 is provided at the opening of the outer wall of the outer cylinder 8. The strength at the opening of the outer cylinder 8 is relatively weak, and a large degree of deformation may occur when pouring the static pressure pile 4. Adding the reinforcement ring 5 can avoid a large degree of deformation.

[0034] like Figure 6 As shown, in this embodiment, preferably, the side tapers of the inner tube 10 and the outer tube 8 are the same, and the quick-drying glue can be evenly filled between the sides of the two.

[0035] In this embodiment, preferably, the lower portion of the insert tube 11 is equally divided into two petals by two spaced slits 14. If the lower portion of the insert tube 11 is not divided into petals, it will either be difficult to expand along the inner tube 10 or will produce irregular cracks and be damaged during the expansion process. The provision of petals not only facilitates the expansion, but also guides the expansion direction of the insert tube 11. The use of two petals can prevent the insert tube 11 from being too separated and can maintain a higher bite force.

[0036] In this embodiment, preferably, four groups of clamping plates 15 and limiting plates 6 are evenly distributed around the axis.

[0037] The sizes of the socket and the plug are set according to actual needs. In this embodiment, preferably, Figure 6 As shown, the wall thickness of the insert tube 11 is 1.2mm, the outer diameter is 15mm, the length of the engaging teeth 9 is 30mm, and the length extending from the adapter tube 3 is 50mm. The upper end outer diameter of the outer tube 8 is 20mm, the height is 50mm, and the side taper is 86°. The upper end outer diameter of the inner tube 10 is 15mm, the height is 30mm, and the side taper is 86°. The outer tube 8 and the inner tube 10 are spaced 3.9mm apart on both sides of the lower end.

[0038] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A static pressure pile splicing device, characterized in that: It includes a plug part, a transfer tube, a socket and a prestressed steel rod which are pre-buried in the static pressure pile and located at the axial position; the opening of the transfer tube faces downward and is flush with the lower end surface of the static pressure pile, and the inner wall is provided with threads; the socket includes an outer tube and an inner tube which are both truncated cone-shaped with a small top and a large bottom; the opening of the outer tube faces upward and is flush with the upper end surface of the static pressure pile, and a limit plate is distributed on the inner wall at the opening, and the lower part of the limit plate forms an angle with the outer tube; the inner tube is fixedly connected to the axial center of the inner bottom surface of the outer tube and the upper end is closed, and the outer wall is provided with downward-facing engaging teeth; the upper and lower ends of the prestressed steel rod are respectively tightened and connected with the inner tube and the transfer tube, and the upper end of the prestressed steel rod is provided with a thorn head, which is located at the inner The plug assembly comprises an insert tube with an opening facing downward and a capsule containing quick-drying glue, the upper outer wall of the insert tube is threaded, the middle outer wall is provided with a card plate, the lower part is divided into petals by a spacing seam and upward-facing engaging teeth are distributed on the inner wall, the upper part of the card plate forms an angle with the insert tube, and the capsule is located in the upper inner part of the insert tube; after splicing, the butt-jointed end faces of adjacent static pressure piles are butted together, the upper part of the insert tube is threadedly connected to the adapter tube, the lower part is inserted into the outer tube and expanded along the inner tube so that the engaging teeth of the two are engaged with each other, the card plate is placed on the inner side of the limit plate, and the thorn head pierces the capsule so that the quick-drying glue fills the space between the outer tube and the inner tube and the gap of the butt-jointed end faces.

2. The static pressure pile splicing device according to claim 1, characterized in that: Anchor heads are provided at the upper and lower ends of the prestressed steel rod. The upper anchor head of the prestressed steel rod abuts against the outer side of the upper end of the inner tube, and the lower anchor head abuts against the inner side of the upper end of the transition tube. The prestressed steel rod tensions the transition tubes and sockets at both ends, then pours concrete and maintains to obtain static pressure piles.

3. The static pressure pile splicing device according to claim 1, characterized in that: The bottom surface of the capsule body is bonded to the inner wall of the inserting tube.

4. The static pressure pile splicing device according to claim 1, characterized in that: A torsion spring is provided between the card plate and the insert tube, and in the initial state, the torsion spring keeps the card plate unfolded.

5. The static pressure pile splicing device according to claim 1, characterized in that: The engaging teeth on the inserting tube and the inner tube are arranged in layers along the axial direction.

6. The static pressure pile splicing device according to claim 1, characterized in that: During splicing, a limiting ring is placed in the adapter tube, and the limiting ring abuts between the outer side of the upper end of the insert tube and the inner side of the upper end of the adapter tube.

7. The static pressure pile splicing device according to claim 1, characterized in that: The outer wall of the outer cylinder is provided with a reinforcement ring at the opening.

8. The static pressure pile splicing device according to claim 1, characterized in that: The side tapers of the inner and outer cylinders are the same.

9. The static pressure pile splicing device according to claim 1, characterized in that: The lower part of the insert is divided into two halves by two interval seams.

10. The static pressure pile splicing device according to claim 1, characterized in that: Four sets of clamping plates and limit plates are evenly distributed around the axis.

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