An adjustable pile foundation connection structure and a construction method thereof

Abstract

The application provides an adjustable pile foundation connecting structure and a construction method thereof, relates to the technical field of building pile foundation adjustment, and comprises a pile column and a pile cap. An installation seat for connecting the pile column and the pile cap is arranged between the pile column and the pile cap. A clamping groove matched with the top of the pile column is formed in the bottom of the installation seat. The installation seat is located on the top of the pile cap. A connecting hole in communication with the clamping groove is formed in the installation seat. A connecting part is arranged on the top of the pile column. An adjusting rod is arranged on the installation seat. One end of the adjusting rod is connected with the installation seat, the other end of the adjusting rod penetrates through the connecting hole, and the installation seat is adjustably installed on the connecting part in the direction of approaching or moving away from the pile column. The application ensures that the actual installation height of the pile cap is the same as the design height as much as possible.

Description

Technical Field

[0001] This application relates to the field of building pile foundation adjustment technology, and in particular to an adjustable pile foundation connection structure and its construction method. Background Technology

[0002] A pile foundation consists of two parts: piles embedded in the ground and a pile cap fixed to the top of the piles. The piles and pile cap are often connected by anchorage, which involves installing anchor rods between the top of the piles and the pile cap to securely connect them. Anchor rods are typically made of high-strength steel and are fixed to the piles and pile cap through pre-embedding or post-embedding, making them a unified whole. This connection method offers high load-bearing capacity and stability and is widely used in large-scale construction projects.

[0003] In construction engineering, it is often necessary to construct multiple pile foundations first. One end of an anchor rod is pre-embedded in the top of the pile, and the other end is then inserted through a pile cap. Finally, concrete is poured between the anchor rod and the pile cap, embedding the anchor rod in the cap. At this point, the pile cap is stably installed on the pile under the connection of the anchor rod. After the installation of multiple pile caps, their heights need to be re-measured. Only after the re-measurement is confirmed to be correct can subsequent construction proceed on the pile caps. If a significant error is found between the actual installation height of the pile cap and the design height during the re-measurement, adjustments are required. This necessitates structural damage to the pile cap to be adjusted, readjusting its height, and then re-pouring concrete to fix the anchor rod to the pile. This method not only results in a long construction period but also affects the strength of the pile foundation. Summary of the Invention

[0004] To address the problem of significant discrepancies between the actual installation height and the design height of the pile cap, which makes adjustment difficult, this application provides an adjustable pile foundation connection structure and its construction method.

[0005] Firstly, this application provides an adjustable pile foundation connection structure, which adopts the following technical solution:

[0006] An adjustable pile foundation connection structure includes a pile column and a pile cap. A mounting seat for connecting the pile column and the pile cap is provided between them. The bottom of the mounting seat has a slot that fits into the top of the pile column. The pile cap is located on top of the mounting seat. A connecting hole communicating with the slot is provided on the mounting seat. A connecting part is provided on the top of the pile column. An adjusting rod is provided on the mounting seat. One end of the adjusting rod is connected to the mounting seat, and the other end passes through the connecting hole and drives the mounting seat to be adjusted and mounted on the connecting part in a direction closer to / away from the pile column.

[0007] By adopting the above technical solution, the mounting base has a slot at its bottom that fits the top of the pile, allowing the mounting base to stably install the pile cap on top of the pile. The adjusting rod on the mounting base passes through a connecting hole and moves the mounting base closer to or further away from the pile, adjusting the installation height of the mounting base on the pile top, thus adjusting the pile cap to a suitable height. Finally, the connecting part is connected to the adjusting rod, ensuring the mounting base is stably installed on the pile, and ensuring that the actual installation height of the pile cap is as close as possible to the design height.

[0008] Optionally, the connecting part is a threaded cylinder fixed to the top of the pile. The adjusting rod includes a connecting rod inserted into the connecting hole and a first screw and a second screw respectively fixedly connected to both ends of the connecting rod. The second screw is threadedly connected to the threaded cylinder. The diameter of the connecting rod is larger than the diameter of the first screw. A retaining ring is fixed on the mounting base at the connecting hole. The first screw passes through the retaining ring. A nut for driving the end of the connecting rod to abut against the retaining ring is sleeved on the first screw. The nut is located on the side of the retaining ring away from the connecting rod.

[0009] By adopting the above technical solution, when adjusting the height of the mounting base, firstly, the connecting rod is inserted into the connecting hole, at which point the first and second screws are located outside the connecting hole respectively. Next, the retaining ring is fitted onto the first screw and connected to the mounting base. Then, the nut is threaded onto the first screw, so that the nut and the end of the connecting rod abut against both sides of the retaining ring. At this point, the connecting rod can only rotate within the connecting hole, but cannot be displaced along the depth direction of the connecting hole. Next, the slot of the mounting base is aligned with the top of the pile, and the second screw is aligned with the threaded cylinder. The first screw is rotated, causing the connecting rod and the second screw to rotate synchronously. The second screw is screwed into the threaded cylinder, and the mounting base, under the combined action of the retaining ring and the nut, is synchronously driven and moves closer to the pile, thereby adjusting the installation height of the mounting base at the top of the pile and ensuring that the actual installation height of the base is as close as possible to the design height.

[0010] Optionally, a mortar layer for fixing the threaded cylinder is provided at the top of the pile column. The upper surface of the mortar layer is located at a position slightly above the middle of the threaded cylinder, and the thickness of the mortar layer is less than the length of the threaded cylinder.

[0011] By adopting the above technical solution, the mortar layer can stably fix the threaded cylinder to the top of the pile column, and the upper surface of the mortar layer is located at the upper part of the middle of the threaded cylinder. At the same time, the thickness of the mortar layer is less than the length of the threaded cylinder, so that the threaded cylinder is not easy to deflect when the second screw is rotated. This ensures that the mounting base is stably installed on the top of the pile column under the combined action of the second screw and the threaded cylinder.

[0012] Optionally, the mounting base has a placement groove for placing the retaining ring, and the placement groove communicates with the connecting hole.

[0013] By adopting the above technical solution, the installation of the slot retaining ring is provided with an environmental basis, so that the retaining ring will not protrude from the upper surface of the mounting base, reducing the damage to the retaining ring during construction and extending the service life of the retaining ring.

[0014] Optionally, a sealing cap is provided on the mounting base at the opening of the placement slot.

[0015] By adopting the above technical solution, the sealing cover can seal the opening of the placement groove, effectively preventing the retaining ring, the first screw, the connecting rod and the second screw from being oxidized and corroded, and extending the service life of the retaining ring, the first screw, the connecting rod and the second screw.

[0016] Optionally, the mounting base has a mounting groove, and the bottom of the support is installed in the mounting groove.

[0017] By adopting the above technical solution, the bottom of the bearing platform is located in the mounting groove, which makes the bearing platform more stable when installed on the mounting base under the constraint of the inner wall of the mounting groove.

[0018] Optionally, an anti-seismic component is provided between the inner wall of the mounting groove and the support platform.

[0019] By adopting the above technical solutions, the foundation supports the building. When ground vibration occurs, the seismic components can dissipate the energy generated by the foundation on the piles, effectively reducing the settlement of the foundation and improving the safety of the building.

[0020] Optionally, the seismic stabilizing component includes a seismic adhesive layer fixed to the bottom wall of the mounting groove and a soft steel damper for connecting the bearing platform to the seismic adhesive layer.

[0021] By adopting the above technical solutions, the combination of the seismic bonding layer and the soft steel damper can quickly dissipate seismic energy, which to a certain extent solves the deformation hazards caused by seismic energy to buildings and pile foundation connection structures, and improves the safety of buildings.

[0022] Optionally, a fixed frame is installed at the bottom of the support platform, and the soft steel damper is connected to the fixed frame.

[0023] By adopting the above technical solution, the fixed frame is installed at the bottom of the foundation, so that the soft steel damper is connected to the foundation through the fixed frame, which increases the stress area at the bottom of the foundation and reduces the risk of damage to the bottom of the foundation.

[0024] Secondly, this application provides a construction method for an adjustable pile foundation connection structure, which, based on the aforementioned adjustable pile foundation connection structure, includes the following steps:

[0025] Install the connecting part and fix it to the top of the pile;

[0026] Pre-install the mounting base, align the slot on the mounting base with the top of the pile, and fasten the mounting base to the top of the pile using the slot;

[0027] Adjust the height of the pile cap by moving the mounting base closer to / away from the pile column using the adjusting rod, thereby adjusting the installation height of the pile cap on the mounting base;

[0028] Position the foundation, and adjust the installation position of the mounting seat on the pile column according to the design requirements using the adjusting rod until the installation height of the foundation meets the design requirements. Then, fix the adjusting rod to the connecting part. At this point, the installation height of the foundation meets the design requirements.

[0029] By adopting the above technical solution, the connecting part is pre-installed on the top of the pile column. Then, the slot of the mounting seat is aligned with the top of the pile column, and the position of the mounting seat on the pile column is adjusted so that the adjusting rod is aligned with the connecting part. Next, the adjusting rod drives the mounting seat to move closer to / away from the pile column until the installation height of the foundation meets the design requirements, at which point the movement of the mounting seat is stopped. Finally, the adjusted adjusting rod is fixedly connected to the connecting part, thereby completing the stable installation of the mounting seat, allowing the mounting seat to stably install the foundation at the design height on the top of the pile column.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. Rotate the first screw, which drives the connecting rod and the second screw to rotate synchronously. The second screw is screwed into the threaded cylinder, and the mounting seat is synchronously driven and moves closer to the pile under the combined action of the retaining ring and nut, thereby adjusting the installation height of the mounting seat on the top of the pile and ensuring that the actual installation height of the pile cap is the same as the design height as much as possible.

[0032] 2. The sealing cap can seal the opening of the slot, effectively preventing the retaining ring, the first screw, the connecting rod and the second screw from being oxidized and corroded, thus extending the service life of the retaining ring, the first screw, the connecting rod and the second screw;

[0033] 3. The combination of the seismic bonding layer and the soft steel damper can quickly dissipate seismic energy, which to a certain extent solves the deformation hazards caused by seismic energy to the building and pile foundation connection structure, and improves the safety of the building. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0036] Figure 2 This is a schematic cross-sectional view of an embodiment of this application.

[0037] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0038] Reference numerals in the attached drawings: 1. Pile column; 2. Foundation; 3. Mounting seat; 4. Slot; 5. Connecting hole; 6. Threaded cylinder; 7. Connecting rod; 8. First screw; 9. Second screw; 10. Snap ring; 11. Nut; 12. Placement slot; 13. Sealing cap; 14. Mounting slot; 15. Seismic adhesive layer; 16. Soft steel damper; 17. Fixing frame; 18. Mortar layer. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0040] This application discloses an adjustable pile foundation connection structure and its construction method. (Refer to...) Figure 1 and Figure 2 An adjustable pile foundation connection structure includes a pile column 1, a mounting base 3, and a pile cap 2. The pile column 1 is pre-installed vertically in the ground. The mounting base 3 is located above the pile column 1, and the pile cap 2 is located above the mounting base 3, so that the pile cap 2 is fixed to the top of the pile column 1 by the mounting base 3. To improve the stability of the pile cap 2 installation, a mounting groove 14 for placing the pile cap 2 is opened at the center of the top of the mounting base 3. The bottom of the pile cap 2 extends into and is fixed in the mounting groove 14, and the top of the pile cap 2 is located outside the mounting groove 14. A locking groove 4 is opened at the bottom of the mounting base 3 to fit the top of the pile column 1. The mounting base 3 is stably fastened to the top of the pile column 1 through the locking groove 4.

[0041] To achieve rapid adjustment of the mounting height of the mounting base 3 and reduce the error between the actual installation height and the designed installation height of the bearing platform 2, refer to Figure 2and Figure 3 The top of the pile column 1 is provided with a connecting part, specifically a threaded cylinder 6. In this embodiment, four threaded cylinders 6 are provided, and the four threaded cylinders 6 are respectively located at the four corners of the top of the pile column 1. The length of the threaded cylinder 6 is less than the depth of the groove 4. Before fastening the mounting base 3, a temporary template is built on the top of the pile column 1, and concrete is poured into the template until the concrete level rises slightly below the top of the threaded cylinder 6. After the concrete solidifies, a mortar layer 18 is formed, so that the four threaded cylinders 6 are stably embedded on the top of the pile column 1.

[0042] Reference Figure 2 and Figure 3 The mounting base 3 has four connecting holes 5 on its upper surface. The four connecting holes 5 are located around the mounting groove 14 and are connected to the slot 4. When the mounting base 3 is fastened to the top of the pile 1 through the slot 4, the four connecting holes 5 are respectively aligned with the four threaded cylinders 6. The mounting base 3 is provided with four adjusting rods, which are respectively set in the four connecting holes 5. One end of the adjusting rod is connected to the mounting base 3, and the other end passes through the connecting hole 5 and drives the mounting base 3 to be adjusted to be connected to the threaded cylinder 6 in the direction of approaching / moving away from the pile 1.

[0043] Reference Figure 2 and Figure 3 The adjusting rod includes a connecting rod 7, a first screw 8, and a second screw 9. The first screw 8 and the second screw 9 are coaxially welded to both ends of the connecting rod 7, and the diameters of both the first screw 8 and the second screw 9 are smaller than the diameter of the connecting rod 7. The connecting rod 7 is inserted into the connecting hole 5, and the length of the connecting rod 7 is less than the depth of the connecting hole 5. The opposite ends of the first screw 8 and the second screw 9 are located outside the connecting hole 5. A hexagonal groove for inserting a hexagonal wrench is formed on the end face of the first screw 8 away from the connecting rod 7. When the hexagonal wrench is inserted into the hexagonal groove at the end of the first screw 8, the first screw 8 can be quickly driven to rotate. The first screw 8 can drive the connecting rod 7 and the second screw 9 to rotate synchronously, so that the second screw 9 is screwed into the threaded cylinder 6.

[0044] Reference Figure 2 and Figure 3 The mounting base 3 has a placement groove 12 at the connection hole 5 on its top. The placement groove 12 communicates with the connection hole 5. A retaining ring 10 is fixedly connected to the placement groove 12 by screws. The first screw 8 passes through the retaining ring 10, and the inner diameter of the retaining ring 10 is smaller than the diameter of the connecting rod 7, while the outer diameter of the retaining ring 10 is larger than the diameter of the connecting rod 7. A nut 11 is also fitted on the first screw 8, and the nut 11 is located on the side of the retaining ring 10 away from the connecting rod 7.

[0045] When installing the mounting base 3 on the top of the pile 1, first fix the threaded cylinder 6 to the top of the pile 1 through the mortar layer 18, then insert the connecting rod 7 into the connecting hole 5, and then put the retaining ring 10 on the first screw 8, while fixing the retaining ring 10 in the placement groove 12 of the mounting base 3. Pull the first screw 8 so that the end of the connecting rod 7 abuts against the bottom of the retaining ring 10; then rotate the nut 11 so that the nut 11 abuts against the top of the retaining ring 10. At this time, the connecting rod 7 can rotate in the connecting hole 5, but cannot slide along the depth direction of the connecting hole 5. After the connecting rod 7 and the mounting base 3 are installed, align the slot 4 of the mounting base 3 with the top of the pile column 1, so that the second screw 9 and the threaded cylinder 6 are aligned and in contact. At this time, rotate the four first screws 8 simultaneously. The first screws 8 can drive the connecting rod 7 and the second screw 9 to rotate synchronously, so that the second screw 9 is screwed into the threaded cylinder 6. As the depth of the second screw 9 into the threaded cylinder 6 increases, the mounting base 3, under the combined action of the retaining ring 10, the nut 11 and the end of the connecting rod 7, drives the bearing platform 2 to move synchronously towards the pile column 1, thereby completing the adjustment of the installation height of the mounting base 3, so that the bearing platform 2 on the mounting base 3 is quickly installed to the designed height. After the installation height of the bearing platform 2 is adjusted, stop rotating the first screws 8. At this time, the thread action between the second screw 9 and the threaded cylinder 6 makes the mounting base 3 and the bearing platform 2 stably installed on the top of the pile column 1.

[0046] To effectively prevent the retaining ring 10, the first screw 8, the connecting rod 7, the second screw 9, and the nut 11 from oxidation and corrosion, refer to... Figure 1 and Figure 2 A sealing cover 13 is provided on the mounting base at the opening of the placement groove 12. The sealing cover 13 is made of rubber material. The sealing cover 13 is sealed and blocked at the opening of the placement groove 12, which can effectively prevent the retaining ring 10, the first screw 8, the connecting rod 7 and the second screw 9 from being oxidized and corroded, and extend the service life of the retaining ring 10, the first screw 8, the connecting rod 7 and the second screw 9.

[0047] Although the bottom of the pile cap 2 is installed in the mounting groove 14 of the mounting base 3, the pile cap 2 is stably fixed on the mounting base 3, thereby improving the stability of the pile foundation. To further improve the stability of the pile foundation under ground vibration, refer to... Figure 1 and Figure 2A fixing frame 17 is fixed to the bottom of the pile cap 2 with mortar, and an anti-seismic component is provided between the fixing frame 17 and the inner bottom wall of the mounting groove 14. To improve the seismic performance of the pile foundation, in this embodiment, the anti-seismic component includes an anti-seismic adhesive layer 15 coated on the inner bottom wall of the mounting groove 14 and multiple soft steel dampers 16 whose bottoms are fixedly bonded to the anti-seismic adhesive layer 15. The anti-seismic adhesive layer 15 can be made of anti-seismic structural adhesive, and the top of the soft steel dampers 16 is connected to the bottom of the fixing frame 17 by rivets, so that the pile cap 2 can be installed in the mounting groove 14 without damaging the bottom structure of the pile cap 2. When the pile cap 2 is installed in the mounting groove 14, the top of the fixing frame 17 is located outside the mounting groove 14, which allows construction personnel to quickly identify the pile cap 2 and the mounting seat 3, and also reduces the risk of damage to the side wall of the pile cap 2 caused by the edge of the groove 14, ensuring the integrity of the pile cap 2 structure.

[0048] This application provides a construction method for an adjustable pile foundation connection structure, which adopts the following technical solution:

[0049] S1, Install the connecting part, and stably install the four threaded cylinders 6 at the four corners of the top of the pile column 1 through the mortar layer 18;

[0050] S2, pre-install mounting base 3, first fix the bottom of the bearing platform 2 to the fixing frame 17 with mortar, and fix multiple soft steel dampers 16 to the bottom of the fixing frame 17, then lay a layer of seismic adhesive layer 15 on the inner bottom wall of the mounting base 3, and fix and bond the soft steel dampers 16 to the inner bottom wall of the mounting groove 14. At this time, the bearing platform 2 is installed on the mounting base 3; then insert the connecting rod 7 into the connecting hole 5 and use the retaining ring 10 and nut 11 to fix the connecting rod 7 to the mounting base 3, then align the retaining groove 4 on the mounting base 3 with the top of the pile column 1, and fasten the mounting base 3 to the top of the pile column 1 through the retaining groove 4. At this time, the second screw 9 and the port of the threaded cylinder 6 are aligned and abutted;

[0051] S3, adjust the height of the bearing platform 2, and simultaneously rotate the four first screws 8. The first screws 8 can drive the connecting rod 7 and the second screw 9 to rotate synchronously, so that the second screw 9 is screwed into the threaded cylinder 6. As the depth of the second screw 9 into the threaded cylinder 6 increases, the mounting seat 3, under the combined action of the retaining ring 10, the nut 11 and the end of the connecting rod 7, drives the bearing platform 2 to move synchronously towards the pile column 1, thereby realizing the adjustment of the installation height of the mounting seat 3 and the bearing platform 2.

[0052] S4, Position the bearing platform 2, and synchronously rotate the four first screws 8 according to the design requirements to adjust the installation position of the mounting seat 3 on the pile column 1 until the installation height of the bearing platform 2 meets the design requirements. Then stop rotating the first screws 8. At this time, the thread action between the second screw 9 and the threaded cylinder 6 makes the mounting seat 3 and the bearing platform 2 stably installed on the top of the pile column 1, so that the installation height of the bearing platform 2 meets the design requirements.

[0053] The implementation principle of the adjustable pile foundation connection structure and its construction method in this application embodiment is as follows: First, a temporary template is built on the top of the pile column 1. According to the position of the four connection holes 5 on the mounting base 3, the four threaded cylinders 6 are placed at the four corners of the top of the pile column 1 respectively. Concrete is poured into the template until the concrete liquid level rises to slightly below the top of the threaded cylinders 6. After the concrete solidifies, a mortar layer 18 is formed, so that the four threaded cylinders 6 are stably embedded on the top of the pile column 1.

[0054] Next, the bottom of the foundation 2 is fixed to the fixing frame 17 with mortar, and multiple soft steel dampers 16 are fixed to the bottom of the fixing frame 17. Then, a layer of anti-seismic adhesive layer 15 is laid on the inner bottom wall of the mounting base 3, and the soft steel dampers 16 are fixedly bonded to the inner bottom wall of the mounting groove 14. At this time, the foundation 2 is installed on the mounting base 3.

[0055] Then, insert the connecting rod 7 into the connecting hole 5, and then put the retaining ring 10 onto the first screw 8, while fixing the retaining ring 10 in the placement groove 12 of the mounting base 3. Pull the first screw 8 so that the end of the connecting rod 7 abuts against the bottom of the retaining ring 10; then rotate the nut 11 so that the nut 11 abuts against the top of the retaining ring 10. At this time, the connecting rod 7 can rotate in the connecting hole 5, but cannot slide along the depth direction of the connecting hole 5.

[0056] After installing the connecting rod 7 and the mounting base 3, align the slot 4 of the mounting base 3 with the top of the pile 1, so that the second screw 9 is aligned and in contact with the threaded cylinder 6. At this time, use a hex wrench to simultaneously rotate the four first screws 8. The first screws 8 can drive the connecting rod 7 and the second screw 9 to rotate synchronously, so that the second screw 9 is screwed into the threaded cylinder 6. As the second screw 9 is screwed into the threaded cylinder 6, the mounting base 3, under the combined action of the retaining ring 10, the nut 11 and the end of the connecting rod 7, drives the bearing platform 2 to move synchronously towards the pile 1, thereby completing the adjustment of the installation height of the mounting base 3, so that the bearing platform 2 on the mounting base 3 is quickly installed to the designed height.

[0057] After adjusting the installation height of the foundation 2, stop rotating the first screw 8. At this time, the threaded action of the second screw 9 and the threaded cylinder 6 will stably install the mounting base 3 and the foundation 2 on the top of the pile column 1. Finally, use the sealing cap 13 to seal the opening of the placement groove 12.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable pile foundation connection structure, comprising piles and a pile cap, characterized in that, A mounting base for connecting the pile and the foundation is provided between them. The bottom of the mounting base has a slot that fits the top of the pile. The foundation is located on top of the mounting base. The mounting base has a connecting hole that communicates with the slot. The top of the pile has a connecting part. The mounting base has an adjusting rod. One end of the adjusting rod is connected to the mounting base, and the other end passes through the connecting hole and drives the mounting base to be adjusted to move closer to or further away from the pile on the connecting part. The connecting part is a threaded cylinder fixed to the top of the pile. The adjusting rod includes a connecting rod inserted into the connecting hole and a first screw and a second screw fixedly connected to both ends of the connecting rod. The second screw is threadedly connected to the threaded cylinder. The diameter of the connecting rod is larger than the diameter of the first screw. A retaining ring is fixed on the mounting base at the connecting hole. The first screw passes through the retaining ring. A nut is sleeved on the first screw to drive the end of the connecting rod to abut against the retaining ring. The nut is located on the side of the retaining ring away from the connecting rod.

2. The adjustable pile foundation connection structure according to claim 1, characterized in that, The top of the pile is provided with a mortar layer for fixing the threaded cylinder. The upper surface of the mortar layer is located slightly above the middle of the threaded cylinder, and the thickness of the mortar layer is less than the length of the threaded cylinder.

3. The adjustable pile foundation connection structure according to claim 1, characterized in that, The mounting base has a placement groove for placing the retaining ring, and the placement groove communicates with the connecting hole.

4. The adjustable pile foundation connection structure according to claim 3, characterized in that, A sealing cap is provided on the mounting base at the opening of the placement slot.

5. The adjustable pile foundation connection structure according to claim 1, characterized in that, The mounting base has a mounting groove, and the bottom of the support is installed in the mounting groove.

6. The adjustable pile foundation connection structure according to claim 5, characterized in that, An anti-seismic component is provided between the inner wall of the mounting groove and the support platform.

7. The adjustable pile foundation connection structure according to claim 6, characterized in that, The seismic-resistant assembly includes a seismic-resistant adhesive layer fixed to the bottom wall of the mounting groove and a soft steel damper for connecting the bearing platform to the seismic-resistant adhesive layer.

8. The adjustable pile foundation connection structure according to claim 7, characterized in that, A fixed frame is installed at the bottom of the foundation, and the soft steel damper is connected to the fixed frame.

9. A construction method for an adjustable pile foundation connection structure, based on an adjustable pile foundation connection structure as described in any one of claims 1-8, characterized in that, Includes the following steps, Install the connecting part and fix it to the top of the pile; Pre-install the mounting base, align the slot on the mounting base with the top of the pile, and fasten the mounting base to the top of the pile using the slot; Adjust the height of the pile cap by moving the mounting base closer to / away from the pile column using the adjusting rod, thereby adjusting the installation height of the pile cap on the mounting base; Position the foundation, and adjust the installation position of the mounting seat on the pile column according to the design requirements using the adjusting rod until the installation height of the foundation meets the design requirements. Then, fix the adjusting rod to the connecting part. At this point, the installation height of the foundation meets the design requirements.

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