High-strength concrete pipe pile connection reinforcing device

Abstract

The utility model provides a high-strength concrete pipe pile connection reinforcing device. The high-strength concrete pipe pile connection reinforcing device comprises an upper pipe pile end plate fixed to the end of an upper pipe pile through upper pipe pile prestressed steel bars. The lower pipe pile end plate is fixed at the end of the lower pipe pile through a lower pipe pile prestressed steel bar; upper end head plate main reinforcement holes through which upper pipe pile prestressed reinforcements penetrate are formed in the upper pipe pile end head plate, and upper end head plate screw holes are formed in the side edges of the upper end head plate main reinforcement holes in a communicating mode; lower end head plate main reinforcement holes penetrating through lower pipe pile prestressed reinforcements are machined in the lower pipe pile end head plate, and lower end head plate screw holes are formed in the side edges of the lower end head plate main reinforcement holes in a communicating mode. Tubular pile preformed holes are formed in the ends of the upper tubular pile and the lower tubular pile, and the positions of the tubular pile preformed holes correspond to the upper end plate screw holes and the lower end plate screw holes respectively. The upper pipe pile and the lower pipe pile are fixedly connected through a plurality of sets of connecting pieces, and the connecting pieces are correspondingly positioned between the pipe pile preformed holes of the upper pipe pile and the lower pipe pile and sequentially penetrate through the upper end plate screw holes and the lower end plate screw holes.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete pipe pile foundation construction technology, and mainly relates to a high-strength concrete pipe pile connection reinforcement device. Background Technology

[0002] Precast concrete pipe piles are widely used in foundation treatment projects for bridges, buildings, and roadbeds due to their advantages such as high strength, good adaptability, fast construction speed, material saving, and good environmental performance. The length of a single precast pipe pile is usually 6-15m. Since the foundation treatment depth of buildings and bridges is generally large, it is necessary to splice the piles to increase their length.

[0003] The main connection methods for precast pipe piles include welding, flange connection, and sulfur mortar anchoring. Flange and bolt connections offer the advantage of fast splicing speed but consume a large amount of steel. Sulfur mortar anchoring involves pre-reserved anchor bars in the upper and lower pile sections, filling the anchor bar holes and joint plane with sulfur mortar, and then applying load. However, sulfur mortar anchoring is mainly suitable for soft soil layers and has poor adaptability to other soil layers, limiting its application in a wider range of projects. Welding is simple to operate, fast to splice, and suitable for various strata, making it the most widely used splicing method. However, welding is highly dependent on welding quality, requiring strict quality control, and often necessitates rework due to substandard welding. Therefore, it is necessary to design connection reinforcement devices to broaden the application of prestressed pipe pile welding. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a high-strength concrete pipe pile connection strengthening device. This device is made of common materials and has a simple structure. It can strengthen the vertical connection between precast pipe piles, which is beneficial to improving the quality of pipe pile joints, increasing the qualified rate of pipe pile formation, and ensuring the bearing capacity of various pipe pile foundations.

[0005] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: a high-strength concrete pipe pile connection reinforcement device, including an upper pipe pile end plate fixed to the end of the upper pipe pile by prestressed steel bars of the upper pipe pile;

[0006] It also includes the end plate of the lower pipe pile, which is fixed to the end of the lower pipe pile by the prestressed steel bars of the lower pipe pile;

[0007] The end plate of the upper pipe pile is machined with the main reinforcement hole of the upper end plate through which the prestressed steel bar of the upper pipe pile passes, and the side of the main reinforcement hole of the upper end plate is connected with the screw hole of the upper end plate.

[0008] The end plate of the lower pipe pile is machined with a main reinforcement hole for the lower end plate through which the prestressed steel bars of the lower pipe pile pass, and the side of the main reinforcement hole of the lower end plate is connected to a screw hole of the lower end plate.

[0009] The ends of the upper and lower pipe piles are provided with reserved holes for the pipe piles, and the positions of the reserved holes for the pipe piles correspond to the screw holes of the upper end plate and the screw holes of the lower end plate, respectively.

[0010] The upper and lower pipe piles are fixedly connected by multiple sets of connectors. The connectors are positioned between the reserved holes of the upper and lower pipe piles and pass through the screw holes of the upper end plate and the screw holes of the lower end plate in sequence.

[0011] The ends of the prestressed steel bars of the upper and lower pipe piles are upset to form the pier heads.

[0012] The diameter of the pier head is greater than the inner diameter of the corresponding upper end plate main reinforcement hole and the lower end plate main reinforcement hole.

[0013] Furthermore, the diameter of the abutment head is smaller than the inner diameter of the corresponding upper end plate screw hole and lower end plate screw hole.

[0014] The middle part of the connector is machined with a threaded section, and the two ends of the threaded section are smooth shaft sections with different lengths. The threaded section is connected to the corresponding upper end plate screw hole by threaded engagement, and the smooth shaft section is matched with the reserved hole of the pipe pile.

[0015] The pre-reserved holes for the pipe piles are pre-formed during the casting of the upper and lower pipe piles using pull-head plates and bolt assemblies.

[0016] The puller plate is machined with puller plate screw holes for matching the corresponding upper end plate screw holes or lower end plate screw holes;

[0017] The bolt assembly includes ordinary bolts and extended bolts, which are alternately installed on the bolt holes of the pull head plate;

[0018] Tensioning bolts are installed in the center of the tensioning plate.

[0019] The length of the ordinary bolt is the sum of the thickness of the end plate and the pull head plate of the upper pipe pile, and it does not extend into the concrete of the pipe pile; the length of the other extended bolt is greater than the sum of the thickness of the end plate and the pull head plate of the upper pipe pile, and the part that extends into the concrete of the pipe pile is unthreaded and is a smooth rod.

[0020] After the upper and lower pipe piles are formed, the pull head plate, ordinary bolts and extension bolts are removed, and the pipe pile pre-reserved hole is formed at the pouring position of the extension bolt.

[0021] The present invention has the following beneficial effects:

[0022] 1. This utility model is easy to construct, with a clear and easy-to-understand process and strong operability. By reserving connection holes, it enhances the forming quality of the pipe pile joint, strengthens the lateral shear resistance of the pipe pile joint, and at the same time plays a positioning function, making the pipe section assembly position more accurate.

[0023] 2. This utility model enhances the hammer resistance of the pipe pile joint by connecting the connector and welding the joint, thereby increasing the driving depth of the precast pipe pile.

[0024] 3. This utility model does not change the overall manufacturing process of precast pipe piles. By adding a small number of connectors, it enhances the integrity of the pipe piles, improves the pass rate of low strain testing and the proportion of Class I piles, reduces the occurrence of defective piles, and saves project costs. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a first-view exploded structural view of the connection between the upper pipe pile end plate and the lower pipe pile end plate of this utility model.

[0027] Figure 2 This is a second-view exploded structural diagram of the connection between the upper pipe pile end plate and the lower pipe pile end plate of this utility model.

[0028] Figure 3 This is a first-view exploded structural diagram of the connection between the upper and lower pipe piles of this utility model.

[0029] Figure 4 This is a second-view exploded structural diagram of the connection between the upper and lower pipe piles of this utility model.

[0030] Figure 5 This is an exploded view of the pipe pile connection structure of this utility model.

[0031] Figure 6 This is an exploded view of the upper pipe pile connection structure of this utility model.

[0032] Figure 7 This is an overall structural diagram of the connection between the upper and lower pipe piles of this utility model.

[0033] Figure 8 This is a structural diagram of the pull head plate and bolt assembly of this utility model.

[0034] In the diagram: 1. Upper pipe pile; 2. Upper pipe pile prestressed steel bar; 3. Upper pipe pile end plate; 4. Upper end plate main reinforcement hole; 5. Upper end plate screw hole; 6. Connector; 7. Lower end plate main reinforcement hole; 8. Lower end plate screw hole; 9. Lower pipe pile prestressed steel bar; 10. Lower pipe pile screw hole; 11. Pipe pile reserved hole; 12. Pull head plate; 13. Pull head plate screw hole; 14. Bolt assembly; 15. Ordinary bolt 15-a; Extended bolt 15-b; Tensioning bolt; 16. Lower pipe pile; 17. Detailed Implementation

[0035] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0036] See Figure 1-8 A high-strength concrete pipe pile connection reinforcement device includes an upper pipe pile end plate 3 fixed to the end of an upper pipe pile 1 by prestressed steel bars 2 of the upper pipe pile; and a lower pipe pile end plate 9 fixed to the end of a lower pipe pile 17 by prestressed steel bars 10 of the lower pipe pile; the upper pipe pile end plate 3 has upper end plate main reinforcement holes 4 through which the upper pipe pile prestressed steel bars 2 pass, and the side of the upper end plate main reinforcement holes 4 is connected to upper end plate screw holes 5; the lower pipe pile end plate 9 has lower end plate screw holes 5 through which the lower pipe pile prestressed steel bars 10 pass. The end plate has a main reinforcement hole 7, and a lower end plate screw hole 8 is provided on the side of the main reinforcement hole 7. The ends of the upper pipe pile 1 and the lower pipe pile 17 are provided with pipe pile reserved holes 12, the positions of which correspond to the upper end plate screw holes 5 and the lower end plate screw holes 8, respectively. The upper pipe pile 1 and the lower pipe pile 17 are fixedly connected by multiple sets of connectors 6. The connectors 6 are positioned between the pipe pile reserved holes 12 of the upper pipe pile 1 and the lower pipe pile 17, and pass through the upper end plate screw holes 5 and the lower end plate screw holes 8 in sequence. By using the above-mentioned connection strengthening device, a reliable connection between adjacent upper pipe piles 1 and lower pipe piles 17 can be achieved. Adjacent pipe piles are reinforced with connectors 6. The connectors are threaded to the upper pipe pile and connected to the end plate screw holes, and are fastened to the lower pipe pile with high-strength mortar. By installing the connectors first and then welding the end plates in each pile splicing process, the quality of the pipe pile connection is strengthened, and the overall integrity of the pipe pile is improved. After the pipe pile is driven into place, the mortar continues to solidify, which can enhance the connection quality between pipe piles and improve the pass rate of non-destructive testing of pipe piles. It is especially suitable for strata with relatively dense soil, slow sinking after hammering, and a large number of hammerings.

[0037] Furthermore, the ends of the prestressed steel bars 2 and 10 of the upper and lower pipe piles are upset to form piers. These piers can be used to connect the corresponding upper pipe pile end plates 3 and lower pipe pile end plates 9 at the pile ends.

[0038] Furthermore, the diameter of the pier head is larger than the inner diameter of the corresponding upper end plate main reinforcement hole 4 and lower end plate main reinforcement hole 7; and the diameter of the pier head is smaller than the inner diameter of the corresponding upper end plate screw hole 5 and lower end plate screw hole 8. These dimensional relationships facilitate the installation of the upper pipe pile end plate 3 and the lower pipe pile end plate 9. Specifically, during installation, the upper end plate screw hole 5 on the upper pipe pile end plate 3 is first passed through the pier head. Then, by rotating the upper pipe pile end plate 3, the position of the pier head is rotated to the position of the upper end plate main reinforcement hole 4, thereby locking and fixing the upper pipe pile end plate 3 through the pier head.

[0039] Furthermore, the middle part of the connector 6 is machined with a threaded section 602, and both ends of the threaded section 602 are smooth shaft sections 601, with different lengths at both ends. The threaded section 602 is connected to the corresponding upper end plate screw hole 5 through threaded engagement, and the smooth shaft section 601 corresponds to the reserved hole 12 of the pipe pile. The connector 6 described above can simultaneously connect adjacent upper pipe piles 1 and lower pipe piles 17.

[0040] Furthermore, the pre-drilled hole 12 in the pipe pile is pre-formed during the pouring of the upper pipe pile 1 and the lower pipe pile 17 using the pull head plate 13 and bolt assembly 15. This forming method ensures that it can be used for the subsequent installation of the connector 6.

[0041] Furthermore, the pull head plate 13 is machined with pull head plate screw holes 14 for engaging with the corresponding upper end plate screw holes 5 or lower end plate screw holes 8; the bolt assembly 15 includes ordinary bolts 15-a and extended bolts 15-b, which are alternately installed on the pull head plate screw holes 14. Through the engagement of the pull head plate screw holes 14 and the bolt assembly 15, the tensioning of the prestressed steel bars 2 and 10 of the upper and lower pipe piles is ensured during the forming of the upper pipe pile 1 and lower pipe pile 17, and it also facilitates the formation of the pre-drilled holes 12 for the pipe piles during the pouring process using the extended bolts 15-b.

[0042] Furthermore, a tension bolt 16 is provided at the center of the tension head plate 13. The aforementioned tension bolt 16 facilitates the tensioning of prestressed steel bars during the pipe pile forming process.

[0043] Furthermore, the length of the ordinary bolt 15-a is the sum of the thicknesses of the upper pipe pile end plate 3 and the pull head plate 13, and it does not extend into the pipe pile concrete; the length of the other extended bolt 15-b is greater than the sum of the thicknesses of the upper pipe pile end plate 3 and the pull head plate 13, and the part extending into the pipe pile concrete is unthreaded and is a smooth rod; through the above-mentioned dimensional matching, on the one hand, the pull head plate 13 can be fixed to the corresponding upper pipe pile end plate 3 or lower pipe pile end plate 9, and on the other hand, it is convenient to form the pipe pile reserved hole 12 inside the pipe pile concrete.

[0044] Furthermore, after the upper pipe pile 1 and the lower pipe pile 17 are formed, the pull head plate 13, ordinary bolt 15-a and extended bolt 15-b are removed, and a pipe pile pre-reserved hole 12 is formed at the pouring position of the extended bolt 15-b. The pipe pile pre-reserved hole 12 facilitates the subsequent positioning and installation of the connecting parts 6.

[0045] Example 2:

[0046] A construction method for a high-strength concrete pipe pile connection reinforcement device includes the following steps:

[0047] Step 1: Install the prestressed steel bars 2 of the upper pipe pile and upset both ends. The upset head passes through the screw hole 5 of the upper end plate, rotate the upper pipe pile end plate 3, and the upset head enters the main reinforcement hole 4 of the upper end plate.

[0048] Step 2: Use ordinary bolts 15-a and extended bolts 15-b in a cross arrangement to bolt the end plate 3 and the pull plate 13 of the pipe pile.

[0049] Step 3: Casting, tensioning, curing and forming of precast pipe piles, and after forming, removing the tension head plate 13 and bolt assembly 15, then fixing the pipe pile end plate 3 and the reserved pipe pile reserved hole 12 at the end of the pipe pile; then transporting the qualified pipe pile to the construction site.

[0050] Step 4: Drive the first pipe pile into the ground using a diesel hammer, and bolt the connector 6 into the pre-drilled hole 12 of the pipe pile to be installed.

[0051] Step 5: Fill the reserved hole 12 of the pipe pile to be extended with an appropriate amount of high-strength mortar, hoist the pipe pile to be installed, and then insert the exposed smooth rod of the connector 6 into the reserved hole 12 of the pipe pile to be extended.

[0052] Step 6: Clean the lower pipe pile end plate 9 and the upper pipe pile end plate 3 of the pipe pile to be installed, and weld the lower pipe pile end plate 9 and the upper pipe pile end plate 3 of the two pipe piles.

[0053] Step 7: Repeat steps 5 and 6 to complete the driving of the pipe pile at this location.

Claims

1. A high-strength concrete pipe pile connection reinforcement device, characterized in that, This includes the end plate (3) of the upper pipe pile, which is fixed to the end of the upper pipe pile (1) by the prestressed steel bars (2) of the upper pipe pile. It also includes a lower pipe pile end plate (9) fixed to the end of the lower pipe pile (17) by the prestressed steel bars (10) of the lower pipe pile. The end plate (3) of the upper pipe pile is machined with the main reinforcement hole (4) of the upper end plate through the prestressed steel bar (2) of the upper pipe pile, and the side of the main reinforcement hole (4) of the upper end plate is connected with the screw hole (5) of the upper end plate. The end plate (9) of the lower pipe pile is machined with a main reinforcement hole (7) through which the prestressed steel bar (10) of the lower pipe pile passes. The side of the main reinforcement hole (7) of the lower end plate is connected with a screw hole (8). The ends of the upper pipe pile (1) and the lower pipe pile (17) are provided with pipe pile reserved holes (12), and the positions of the pipe pile reserved holes (12) correspond to the upper end plate screw holes (5) and the lower end plate screw holes (8), respectively. The upper pipe pile (1) and the lower pipe pile (17) are fixedly connected by multiple sets of connectors (6). The connectors (6) are positioned between the reserved holes (12) of the upper pipe pile (1) and the lower pipe pile (17), and pass through the upper end plate screw hole (5) and the lower end plate screw hole (8) in sequence.

2. The high-strength concrete pipe pile connection reinforcement device according to claim 1, characterized in that: The ends of the prestressed steel bars (2) of the upper pipe pile and the prestressed steel bars (10) of the lower pipe pile are upset to form the pier head.

3. The high-strength concrete pipe pile connection reinforcement device according to claim 2, characterized in that: The diameter of the pier head is greater than the inner diameter of the corresponding upper end plate main reinforcement hole (4) and lower end plate main reinforcement hole (7); Furthermore, the diameter of the pier head is smaller than the inner diameter of the corresponding upper end plate screw hole (5) and lower end plate screw hole (8).

4. The high-strength concrete pipe pile connection reinforcement device according to claim 3, characterized in that: The middle part of the connector (6) is machined with a threaded section (602), and the two ends of the threaded section (602) are optical shaft sections (601), and the lengths of the optical shaft sections (601) at the two ends are different; the threaded section (602) is connected to the corresponding upper end plate screw hole (5) by threaded engagement, and the optical shaft section (601) is matched with the reserved hole (12) of the pipe pile.

5. The high-strength concrete pipe pile connection reinforcement device according to claim 4, characterized in that: The pre-reserved hole (12) of the pipe pile is pre-formed during the casting of the upper pipe pile (1) and the lower pipe pile (17) by means of the pull head plate (13) and the bolt assembly (15).

6. The high-strength concrete pipe pile connection reinforcement device according to claim 5, characterized in that: The puller plate (13) is machined with a puller plate screw hole (14) for matching with the corresponding upper end plate screw hole (5) or lower end plate screw hole (8). The bolt assembly (15) includes ordinary bolts (15-a) and extended bolts (15-b), which are staggered on the bolt holes (14) of the pull head plate; Tensioning bolts (16) are provided at the center of the tensioning head plate (13).

7. The high-strength concrete pipe pile connection reinforcement device according to claim 6, characterized in that: The length of the ordinary bolt (15-a) is the sum of the thickness of the end plate (3) and the pull plate (13) of the upper pipe pile, and it does not extend into the concrete of the pipe pile; the length of the other extended bolt (15-b) is greater than the sum of the thickness of the end plate (3) and the pull plate (13) of the upper pipe pile, and the part that extends into the concrete of the pipe pile is unthreaded and is a smooth rod.

8. The high-strength concrete pipe pile connection reinforcement device according to claim 6, characterized in that: After the upper pipe pile (1) and the lower pipe pile (17) are formed, the pull head plate (13), ordinary bolt (15-a) and extended bolt (15-b) are removed, and a pipe pile reserved hole (12) is formed at the pouring position of the extended bolt (15-b).

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