A pile foundation and a method of reinforcing a pile foundation

Abstract

The present application relates to a kind of pile foundation and the reinforcement method of pile foundation, belong to pile foundation technical field, including: the pile body of multiple installation slots;Reinforcing cage, set in the outer circumferential side of pile body, and with pile body clamping, and can be dismantled connection;Clamping device, rotation is set in installation slot, one end of clamping device and reinforcing cage clamping.Reinforcing cage includes being provided with multiple and being located in multiple installation slots respectively first column, be provided with multiple and be circularly distributed in the outer circumferential side of pile body second column, first connecting ring being set on second column and the connecting frame for connecting first column and second column;Clamping device and first column and connecting frame clamping.The present application is by first placing pile basic body into hole, then reinforcing cage is sleeved on pile basic body, so that connection is reliable.

Description

Technical Field

[0001] This invention relates to the field of pile foundation technology, and in particular to a pile foundation and a method for reinforcing pile foundations. Background Technology

[0002] A pile foundation is a deep foundation consisting of piles and a pile cap connecting the tops of the piles, or a single pile foundation consisting of a column connected to the pile foundation. It is simply called a pile foundation. If the entire pile body is buried in the soil and the bottom of the pile cap is in contact with the soil, it is called a low pile cap pile foundation. If the upper part of the pile body is exposed above the ground and the bottom of the pile cap is above the ground, it is called a high pile cap pile foundation. Building pile foundations are usually low pile cap pile foundations. Pile foundations are widely used in high-rise buildings.

[0003] Chinese Patent Publication No. CN114808955A discloses a pile foundation and a method for reinforcing pile foundations. The specific technical solution is as follows: A method for reinforcing pile foundations includes the following steps: Drilling: A trench is dug on the foundation, and protective walls are set on the inner sidewalls and bottom of the trench. The location of the pile foundation is marked on the bottom of the trench, and a hole is drilled; Pile foundation placement: The pile foundation is placed in the foundation pit, with the inner pile nested inside the outer pile and extending beyond the top surface of the outer pile, and the inner pile communicating with the outer pile; Laying reinforcing mesh: A reinforcing mesh is laid in the trench, with the inner pile extending beyond the reinforcing mesh. The portion of the reinforcing mesh above the gap between the outer and inner piles is bent and extends into the gap; Grouting: Grout is injected through the inner pile into the outer pile, and grouting is performed on the inner pile until the grout overflows from the top of the inner pile and flows into the trench, covering the reinforcing mesh, thus completing the reinforcement of the pile foundation. This device solves the problems of uncontrollable direction and poor stability when pile foundations are driven into the ground in the prior art.

[0004] However, the above-mentioned technical solutions involve many steps and a heavy workload during construction, resulting in a long construction period and difficulty in ensuring the connection between the pile foundation and the reinforcing cage. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background art by proposing a method for strengthening pile foundations and ensuring reliable connection by first placing the pile foundation body into the hole and then fitting the reinforcing cage onto the pile foundation body.

[0006] On the one hand, the present invention proposes a pile foundation, comprising: A foundation pile body with multiple mounting slots; The reinforcing cage is set on the outer periphery of the pile body, and is snapped into the pile body and can be detached. The snap-fit ​​device is rotatably installed in the mounting slot, and one end of the snap-fit ​​device is snapped into the reinforcing cage.

[0007] Preferably, the reinforcing cage includes a plurality of first columns located in a plurality of mounting slots, a plurality of second columns arranged in a circular pattern on the outer periphery of the pile body, a first connecting ring disposed on the second columns, and a connecting frame for connecting the first columns and the second columns; a snap-fit ​​device snaps into the first columns and the connecting frame.

[0008] Preferably, the reinforcing cage further includes multiple third columns, all located on the outside of the pile body, a second connecting ring on the third columns, and supporting reinforcing bars on the first connecting ring and connected to the second connecting ring; the first connecting ring, the second connecting ring, the connecting frame, and the supporting reinforcing bars are all arranged in multiple vertical directions and are equidistant.

[0009] Preferably, the pile body is provided with a snap-fit ​​groove, and there are multiple snap-fit ​​grooves, which are connected to the installation groove; the snap-fit ​​device includes multiple sets of snap-fit ​​columns, connecting rods and rotating disks; multiple snap-fit ​​columns and connecting rods are provided, and the two ends of the connecting rods are respectively connected to the snap-fit ​​columns and rotating disks; the snap-fit ​​columns are slidably disposed in the snap-fit ​​grooves and snap-fitted with the first column; a rotating frame is provided on the rotating disk; multiple rotating frames are provided.

[0010] On the other hand, the present invention proposes a method for reinforcing pile foundations, applicable to the aforementioned pile foundations, the method comprising the following steps: S1. First, select the installation location of the pile foundation and then carry out drilling construction at the installation location; S2. The depth of the hole is equal to the length of the pile body, and the diameter of the hole is greater than the diameter of the reinforcing cage. S3. Erect the support equipment above the hole and lift the pile body using the hoisting mechanism; S4. After lifting the pile body, move the pile body above the support equipment and insert the lower end of the pile body into the support equipment. S5. The pile body is slowly lowered using a hoisting mechanism, and the pile body is guided by a support device. S6. After the pile body falls to the bottom of the hole, the support equipment is removed from the pile body. S7. Then, the steel cage is lifted by the hoisting mechanism and placed into the hole to connect with the foundation pile body; S8. By rotating the clamping device, the clamping device is clamped onto the reinforcing cage, thereby connecting the pile body with the clamping device. S9. Reinforcement is achieved by injecting concrete into the borehole.

[0011] Preferably, the support equipment includes a mounting base erected at the hole, two symmetrically arranged support frames slidably mounted on the mounting base, two guide wheels slidably mounted on the support frames to guide the pile body against both sides, and a brake disc to increase the friction between the guide wheels and the pile body to ensure smooth landing; the mounting base is provided with an adjustment mechanism for driving the support frames to move, and the support frames are provided with a support device for pushing the guide wheels to move.

[0012] Preferably, a sliding frame is provided on the guide wheel; the guide wheel is rotatably connected to the sliding frame; the support device includes a sliding column disposed on the sliding frame and slidably connected to the support frame, an elastic element disposed on the sliding column and connected to the sliding frame and the support frame at both ends respectively, and a blocking platform disposed on the end of the sliding column away from the sliding frame.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects: In this invention, the foundation pile body is placed into the hole, and then the reinforcing cage is placed into the hole. The first column is inserted into the installation groove and fixed by a snap-fit ​​device. The second column is connected to the first column through a connecting frame. Multiple supporting reinforcing bars are evenly connected to the first and second connecting rings, and the second column is connected to the third column. This makes the connection between the reinforcing cage and the foundation pile body more reliable. Then, concrete is poured into the hole. The reinforcing cage increases the adhesion and prevents the foundation pile body from having a gap with the concrete, which would cause the foundation pile body to shake. This allows for better reinforcement of the foundation pile body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a cross-sectional view of the steel cage in this invention; Figure 3 This is a cross-sectional view of the snap-fit ​​device in this invention; Figure 4 This is a partial structural diagram of an embodiment of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0015] Reference numerals in the attached drawings: 1. Pile body; 101. Mounting groove; 102. Snap-fit ​​groove; 21. First column; 22. Second column; 23. Third column; 3. First connecting ring; 4. Second connecting ring; 5. Connecting frame; 6. Supporting steel bar; 7. Snap-fit ​​device; 701. Snap-fit ​​column; 702. Connecting rod; 703. Rotating disc; 704. Rotating frame; 8. Mounting seat; 9. Support frame; 10. Guide wheel; 1001. Sliding frame; 11. Brake disc; 12. Support device; 1201. Sliding column; 1202. Elastic element; 1203. Blocking platform; 13. Adjustment mechanism. Detailed Implementation Example

[0016] like Figures 1-5 As shown, the present invention proposes a pile foundation, including a pile body 1, a reinforcing cage and a snap-fit ​​device 7; the pile body 1 is provided with a plurality of installation slots 101; the reinforcing cage is provided on the outer periphery of the pile body 1 and snap-fits with the pile body 1 and is detachably connected; the snap-fit ​​device 7 is rotatably provided at the installation slot 101, and one end of the snap-fit ​​device 7 is snap-fitted with the reinforcing cage.

[0017] The reinforcing cage includes multiple first columns 21 located in multiple mounting slots 101, multiple second columns 22 arranged in a circular pattern on the outer periphery of the pile body 1, a first connecting ring 3 on the second columns 22, and a connecting frame 5 for connecting the first columns 21 and the second columns 22; a snap-fit ​​device 7 snaps into the first columns 21 and the connecting frame 5. The reinforcing cage also includes multiple third columns 23, all located on the outer side of the pile body 1, a second connecting ring 4 on the third columns 23, and supporting reinforcing bars 6 on the first connecting rings 3 and connected to the second connecting rings 4; multiple first connecting rings 3, second connecting rings 4, connecting frames 5, and supporting reinforcing bars 6 are arranged vertically and at equal intervals.

[0018] A method for reinforcing pile foundations is also proposed, applicable to the aforementioned pile foundations, comprising the following steps: S1. First, select the installation location of the pile foundation and then carry out drilling construction at the installation location; S2. The depth of the hole is equal to the length of the pile body 1, and the diameter of the hole is greater than the diameter of the reinforcing cage. S3. Erect the support equipment above the hole and lift the pile body 1 using the hoisting mechanism; S4. After lifting the pile body 1, move the pile body 1 above the support equipment and insert the lower end of the pile body 1 into the support equipment. S5. The pile body 1 is slowly lowered using a hoisting mechanism, and the pile body 1 is guided by a support device. S6. After the pile body 1 falls to the bottom of the hole, the support equipment is removed from the pile body 1. S7. Then, the steel cage is lifted by the hoisting mechanism and placed into the hole to connect with the pile body 1. S8. By rotating the clamping device 7, the clamping device 7 is clamped onto the reinforcing cage, so that the pile body 1 is connected to the clamping device 7. S9. Reinforcement is achieved by injecting concrete into the borehole.

[0019] In this embodiment, after the hole is dug, the pile body 1 is lifted by a hoisting mechanism, and then the pile body 1 is supported and guided by a support device. After the pile body 1 is placed into the hole, the reinforcing cage can be placed into the hole without additional adjustments. The first column 21 is inserted into the installation groove 101 and fixed by the snap-fit ​​device 7. The second column 22 is connected to the first column 21 through the connecting frame 5. Multiple supporting steel bars 6 are evenly connected to the first connecting ring 3 and the second connecting ring 4, and the second column 22 is connected to the third column 23. This makes the connection between the reinforcing cage and the pile body 1 more reliable. Then, concrete is poured into the hole. The reinforcing cage increases the adhesion and prevents the pile body 1 from having a gap with the concrete, which would cause the pile body 1 to shake. This allows for better reinforcement of the pile body 1. Example

[0020] like Figures 1-3 As shown, the present invention proposes a pile foundation. Compared with Embodiment 1, in this embodiment, the pile body 1 is provided with a snap-fit ​​groove 102, and multiple snap-fit ​​grooves 102 are provided and are connected to the installation groove 101; the snap-fit ​​device 7 includes multiple sets of snap-fit ​​columns 701, connecting rods 702 and rotating disks 703; multiple snap-fit ​​columns 701 and multiple connecting rods 702 are provided, and the two ends of the connecting rods 702 are respectively connected to the snap-fit ​​columns 701 and the rotating disks 703. The snap-fit ​​columns 701 are slidably disposed in the snap-fit ​​grooves 102 and snap-fitted with the first column 21; multiple rotating frames 704 are provided on the rotating disks 703.

[0021] In this embodiment, when the reinforcing cage is placed on the outer periphery of the pile body 1, the first column 21 will definitely be located in the mounting groove 101 because the pile body 1 has a mounting groove 101. Rotating the rotating frame 704 causes the rotating disk 703 to rotate, which in turn causes the connecting rod 702 to move. The connecting rod 702 causes the locking column 701 to move, so that the locking column 701 moves into the mounting groove 101 and locks the first column 21, preventing the first column 21 from being directly separated from the pile body 1. When the first column 21 moves upward, it will drive the connecting frame 5 to move, and the connecting frame 5 will also be locked by the locking column 701. This allows the pile body 1 and the reinforcing cage to be reliably connected and share the load. Example

[0022] like Figures 1-5 As shown, the pile foundation proposed in this invention, compared with Embodiment 1 or Embodiment 2, the supporting equipment in this embodiment includes a mounting base 8 erected at the hole, two symmetrically arranged support frames 9 slidably mounted on the mounting base 8, two guide wheels 10 arranged on the support frames 9 to guide the pile body 1 against both sides, and brake discs 11 to increase the friction between the pile body 1 and the guide wheels 10 so that the pile body 1 lands smoothly; the mounting base 8 is provided with an adjustment mechanism 13 for driving the support frames 9 to move, and the support frames 9 are provided with a support device 12 for pushing the guide wheels 10 to move. A sliding frame 1001 is provided on the guide wheel 10; the guide wheel 10 is rotatably connected to the sliding frame 1001; the support device 12 includes a sliding column 1201 provided on the sliding frame 1001 and slidably connected to the support frame 9, an elastic element 1202 provided on the sliding column 1201 and connected at both ends to the sliding frame 1001 and the support frame 9 respectively, and a blocking platform 1203 provided on the end of the sliding column 1201 away from the sliding frame 1001.

[0023] In this embodiment, the mounting base 8 is erected above the hole, and the pile body 1 is lifted by the hoisting mechanism and moved above the mounting base 8, so that the lower end of the pile body 1 moves between the two guide wheels 10. The support frame 9 is driven to move by the adjustment mechanism 13, which in turn moves the support device 12 and the guide wheels 10, so that the guide wheels 10 abut against the pile body 1. By adjusting the pressure applied to the pile body 1 by the guide wheels 10, the guide wheels 10 can move relative to the brake disc 11, so that the guide wheels 10 contact the brake disc 11, increasing the friction and thus supporting the pile body 1. This allows the pile body 1 to not only support the pile body during hoisting but also... The pile body 1 is guided and can reduce the pressure of hoisting, making the hoisting more stable. When the friction is large enough, it can lock the guide wheel 10, preventing the pile body 1 from descending further, thereby maximizing the distribution of pressure on the hoisting mechanism and ensuring safety. When the friction is reduced, the pile body 1 can be slowly placed into the hole to complete the installation of the pile body 1. There is no need to adjust the position after installation, and it can be directly installed in one go, which is convenient for operation. The adjustment mechanism 13 is a two-way screw drive structure, which can drive the two support frames 9 to move at the same time. The elastic element 1202 gives the sliding frame 1001 a counter-thrust force, so that the guide wheel 10 can separate from the brake disc 11.

[0024] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A pile foundation, characterized in that, include: A pile body (1) having multiple mounting slots (101); The reinforcing cage is set on the outer periphery of the pile body (1), and is snapped into the pile body (1) and can be detachably connected; The snap-fit ​​device (7) is rotatably set at the mounting groove (101), and one end of the snap-fit ​​device (7) is snapped into the steel cage; The reinforcing cage includes a first column (21) with multiple first columns (21) located in multiple mounting slots (101), a second column (22) with multiple second columns (22) arranged in a circular pattern on the outer periphery of the pile body (1), a first connecting ring (3) on the second column (22), and a connecting frame (5) for connecting the first column (21) and the second column (22); a snap-fit ​​device (7) snaps into the first column (21) and the connecting frame (5); The pile body (1) is provided with a snap-fit ​​groove (102), and there are multiple snap-fit ​​grooves (102) that are connected to the installation groove (101). The snap-fit ​​device (7) includes multiple snap-fit ​​columns (701), connecting rods (702) and rotating disks (703). Multiple snap-fit ​​columns (701) and connecting rods (702) are provided. The two ends of the connecting rods (702) are connected to the snap-fit ​​columns (701) and the rotating disks (703) respectively. The snap-fit ​​columns (701) are slidably disposed in the snap-fit ​​grooves (102) and snap-fitted with the first column (21). A rotating frame (704) is provided on the rotating disks (703). Multiple rotating frames (704) are provided.

2. The pile foundation according to claim 1, characterized in that, The steel cage also includes a third column (23) which is set on the outside of the pile body (1), a second connecting ring (4) set on the third column (23), and a supporting steel bar (6) set on the first connecting ring (3) and connected to the second connecting ring (4); the first connecting ring (3), the second connecting ring (4), the connecting frame (5) and the supporting steel bar (6) are all set in multiple vertical directions and are arranged at equal intervals.

3. A method for reinforcing pile foundations, applied to the pile foundations described in claim 1, characterized in that, The method includes the following steps: S1. First, select the installation location of the pile foundation and then carry out drilling construction at the installation location; S2, The depth of the hole is equal to the length of the pile body (1), and the diameter of the hole is greater than the diameter of the steel cage; S3. The support equipment is erected above the hole, and the pile body (1) is lifted by the hoisting mechanism; S4. After lifting the pile body (1), move the pile body (1) above the support equipment and insert the lower end of the pile body (1) into the support equipment. S5. The pile body (1) is slowly lowered by the hoisting mechanism and guided by the support equipment. S6. After the pile body (1) falls to the bottom of the hole, the support equipment is removed from the pile body (1); S7. Then, the steel cage is lifted by the hoisting mechanism and placed into the hole to connect with the pile body (1). S8. By rotating the clamping device (7), the clamping device (7) is clamped on the steel cage, so that the pile body (1) is connected to the clamping device (7). S9. Reinforcement is achieved by injecting concrete into the borehole.

4. The pile foundation reinforcement method according to claim 3, characterized in that, The support equipment includes a mounting base (8) erected at the hole, two symmetrically arranged support frames (9) slidably mounted on the mounting base (8), two guide wheels (10) slidably mounted on the support frame (9) to guide the pile body (1) against both sides, and a brake disc (11) to increase the friction between the guide wheel (10) and the pile body (1) to land smoothly; the mounting base (8) is provided with an adjustment mechanism (13) for driving the support frame (9) to move, and the support frame (9) is provided with a support device (12) for pushing the guide wheel (10) to move.

5. The pile foundation reinforcement method according to claim 4, characterized in that, A sliding frame (1001) is provided on the guide wheel (10); the guide wheel (10) is rotatably connected to the sliding frame (1001); the support device (12) includes a sliding column (1201) provided on the sliding frame (1001) and slidably connected to the support frame (9), an elastic element (1202) provided on the sliding column (1201) and connected at both ends to the sliding frame (1001) and the support frame (9) respectively, and a blocking platform (1203) provided on the end of the sliding column (1201) away from the sliding frame (1001).

Images