Underpinning device for pit type steel pipe static pressure pile

Abstract

The utility model discloses a pit type steel pipe static pressure pile underpinning device which comprises a base, the top end of the base is fixedly connected with a fixing column, the end, away from the base, of the fixing column is fixedly connected with a counter-force frame, and a fixing module is assembled between the base and the counter-force frame. A jack is assembled on the side, close to the base, of the reaction frame, a reinforcing assembly is arranged at the top of the base, a first steel pipe pile is slidably connected to the middle of the base, a second steel pipe pile is assembled at the end, away from the reaction frame, of the first steel pipe pile, and a connecting assembly is arranged between the first steel pipe pile and the second steel pipe pile. Through cooperation of the base, the connecting plate, the fixing block, the limiting pipe, the limiting groove and other structures, the overall pressure resistance and structural stability of the underpinning device are effectively enhanced, part damage caused by local pressure concentration is avoided, meanwhile, it is ensured that the steel pipe pile can accurately reach the expected reinforcing depth, and the construction quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology, specifically to a replacement device for pit-type steel pipe static pressure piles. Background Technology

[0002] In civil engineering construction, when the bearing capacity of the existing building foundation is insufficient, or when it is necessary to reinforce or renovate the existing foundation, a support device is used. Steel pipe piles are pressed into the foundation through static pressure, thereby improving the bearing capacity of the foundation, supporting and supporting the superstructure, ensuring the stability of the building, meeting different engineering needs, and ensuring the safety and quality of the construction project.

[0003] The underpinning device for pit-type static pressure steel pipe piles mainly consists of steel pipe piles, a reaction frame, and jacks. Its working principle involves excavating a pit under the existing building foundation, placing the steel pipe piles inside, using the reaction frame to provide reaction force, and applying vertical pressure through the jacks to gradually press the steel pipe piles into the soil. This achieves the purpose of reinforcing the foundation, bearing the building load, and thus underpinning the building foundation, enhancing foundation stability, and ensuring building safety.

[0004] The overall structure of the underpinning device for pit-type steel pipe static pressure piles is usually assembled using a simple assembly method. When the driving device drives the steel pipe pile to press down, if it encounters significant geological resistance, the connection points are prone to loosening, deformation, or even disengagement under the strong downward reaction force. This damages the overall structural integrity of the underpinning device, making it impossible to effectively and stably transmit the pressure of the driving device to the steel pipe pile. Consequently, the steel pipe pile cannot continue to be pressed down smoothly, affecting the construction efficiency of the foundation reinforcement project, increasing the probability of safety risks during construction, and failing to ensure that the steel pipe pile can achieve the expected reinforcement depth and bearing capacity. Utility Model Content

[0005] The purpose of this utility model is to provide a replacement device for pit-type steel pipe static pressure piles to solve the problems mentioned in the background art.

[0006] A replacement device for a pit-type steel pipe static pressure pile includes a base, a fixed column fixedly connected to the top of the base, a reaction frame fixedly connected to the end of the fixed column away from the base, a fixed module assembled between the base and the reaction frame, a jack assembled on the side of the reaction frame near the base, a reinforcing component provided on the top of the base, a steel pipe pile one slidably connected to the middle of the base, a steel pipe pile two assembled at the end of the steel pipe pile one away from the reaction frame, a connecting component provided between the steel pipe pile one and the steel pipe pile two, and an auxiliary component provided at the end of the steel pipe pile two away from the steel pipe pile one.

[0007] The reinforcing component includes a connecting plate, which is fixedly connected to both ends of the fixing module. Fixing blocks are evenly arranged on the side of the base near the reaction frame, and a limit tube is assembled in the middle of the base.

[0008] As a further description of the above technical solution:

[0009] The auxiliary component includes a pile tip, which is located at the bottom end of the steel pipe pile 2, and a hole is formed in the middle of the pile tip.

[0010] As a further description of the above technical solution:

[0011] The connecting assembly includes a connecting ring, which is sleeved between the first steel pipe pile and the second steel pipe pile, and a bolt is fitted in the middle of the connecting ring.

[0012] As a further description of the above technical solution:

[0013] A limiting groove is provided on the side of the fixed column near the steel pipe pile, and the connecting plate is slidably connected to the middle of the connecting plate.

[0014] As a further description of the above technical solution:

[0015] One of the steel pipe piles is located in the middle of the fixed module, and the steel pipe pile is slidably connected to the middle of the limiting tube.

[0016] As a further description of the above technical solution:

[0017] The jack is positioned between the reaction frame and the connecting plate.

[0018] As a further description of the above technical solution:

[0019] Both the first steel pipe pile and the second steel pipe pile have bolt holes in their middle sections, and the second bolt is threaded into the middle of the bolt holes.

[0020] As a further description of the above technical solution:

[0021] A bolt is fitted in the middle of the base, and a nut is fitted at one end of the bolt hole. By adopting the above technical solution, the replacement device is strengthened and reinforced, which helps to improve the safety and stability of the replacement device operation.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. By using a connecting plate in the reinforced component to fix the two ends of the fixed module, and cooperating with the fixing block and limiting tube on the base, when the jack applies pressure, the connecting plate evenly distributes the pressure to the fixed module and the base, the fixing block prevents the base from shifting, and the limiting tube ensures that the steel pipe pile is pressed down stably in the predetermined direction. This helps to enhance the overall compressive strength and structural stability of the replacement device, avoids component damage caused by local pressure concentration, and ensures that the steel pipe pile can accurately reach the expected reinforcement depth, thus improving the construction quality.

[0024] 2. By utilizing the physical properties of the pile tip itself and the design of the holes, the stress and displacement patterns of the soil are effectively altered during the pressing process, significantly reducing the resistance to the sinking of the steel pipe pile. This makes it easier for the steel pipe pile to penetrate the soil layer, while also reducing disturbance to the surrounding soil, enhancing the controllability of the construction process, and improving the safety and accuracy of the construction.

[0025] 3. The connecting ring is tightly fitted between steel pipe pile one and steel pipe pile two, and the bolt two is firmly connected to the bolt hole in the middle of the steel pipe pile. This ensures the stability and tightness of the connection between multiple steel pipe piles. The connecting component can effectively transmit pressure, so that each section of steel pipe pile works together as a whole, avoiding pressure loss or interruption at the connection point, and helping to ensure the continuity and stability of the steel pipe pile pressing operation. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the present utility model.

[0027] Figure 2 This is a schematic diagram of the structure of the content limiting tube of this utility model;

[0028] Figure 3 This is a structural schematic diagram of the steel pipe pile, which is the subject of this utility model.

[0029] In the diagram: 1. Base; 2. Fixing block; 3. Reaction frame; 4. Fixing column; 5. Jack; 6. Steel pipe pile one; 7. Steel pipe pile two; 8. Bolt one; 9. Reinforcing component; 10. Connecting plate; 11. Limiting groove; 13. Limiting tube; 14. Fixing module; 15. Connecting component; 16. Connecting ring; 17. Bolt two; 18. Nut; 19. Bolt hole; 20. Auxiliary component; 21. Pile tip; 22. Hole. Detailed Implementation

[0030] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0031] Please see Figures 1-2 This utility model provides a technical solution: a replacement device for a pit-type steel pipe static pressure pile, including a base 1, a fixed column 4 fixedly connected to the top of the base 1, a reaction frame 3 fixedly connected to the end of the fixed column 4 away from the base 1, a fixed module 14 assembled between the base 1 and the reaction frame 3, a jack 5 assembled on the side of the reaction frame 3 near the base 1, a reinforcing component 9 provided on the top of the base 1, a steel pipe pile 6 slidably connected to the middle of the base 1, a steel pipe pile 7 assembled at the end of the steel pipe pile 6 away from the reaction frame 3, and a connecting component 15 provided between the steel pipe pile 6 and the steel pipe pile 7. An auxiliary component 20 is provided at the end of the steel pipe pile 7 away from the steel pipe pile 6; the reinforcing component 9 includes a connecting plate 10, which is fixedly connected to both ends of the fixed module 14; a fixing block 2 is evenly provided on the side of the base 1 near the reaction frame 3; a limiting tube 13 is assembled in the middle of the base 1; a limiting groove 11 is opened on the side of the fixed column 4 near the steel pipe pile 6; the connecting plate 10 is slidably connected in the middle of the connecting plate 10; the steel pipe pile 6 is located in the middle of the fixed module 14; the steel pipe pile 6 is slidably connected in the middle of the limiting tube 13; and the jack 5 is located between the reaction frame 3 and the connecting plate 10.

[0032] Specifically, after excavating a pit under the existing building foundation, the underpinning device for the static pressure steel pipe pile is installed inside. The foundation is supported by the base 1. After activating the jack 5, the jack 5 uses the reaction force provided by the reaction frame 3 to apply vertical pressure. The steel pipe pile 6 and the steel pipe pile 7 are fixed by the fixing module 14, so that they enter the ground in sequence and effectively carry out the pressing operation. The fixing block 2 on the base 1 firmly restricts the displacement of the base 1 when the underpinning device is under force, ensuring that the foundation of the entire device is always in a stable state, effectively preventing the construction process from being interfered with by the displacement of the base 1. The limiting tube 13 is closely attached to the steel pipe pile 6, providing precise guidance for the steel pipe pile 6 during the pressing process, so that the steel pipe pile 6 is pressed down strictly in the predetermined direction, which effectively ensures the accuracy requirements of the construction. The connecting plate 10 evenly distributes the pressure throughout the entire device structure, which helps to reduce the problem of excessive local pressure concentration and ensures the overall stability and safety of the underpinning device.

[0033] Please see Figure 3The present invention provides a technical solution: the auxiliary component 20 includes a pile tip 21, which is disposed at the bottom end of the steel pipe pile 7, and a hole 22 is provided in the middle of the pile tip 21.

[0034] Specifically, by placing the pile tip 21 at the bottom of the steel pipe pile 7, the pile tip 21 will be the first to contact the soil layer during the operation of the underpinning device. Since the pile tip 21 has a hole 22 in the middle, when the steel pipe pile begins to be pressed down, the soil can enter the interior of the steel pipe pile through the hole 22 under pressure, which effectively changes the stress and displacement mode of the soil and greatly reduces the soil squeezing effect at the pile tip 21. This significantly reduces the resistance encountered when the steel pipe pile sinks, allowing the steel pipe pile to cut into the soil layer more smoothly and improve construction efficiency.

[0035] Please see Figure 1 and Figure 3 The present invention provides a technical solution: the connecting component 15 includes a connecting ring 16, which is sleeved between the first steel pipe pile 6 and the second steel pipe pile 7. A bolt 2 17 is assembled in the middle of the connecting ring 16. Bolt holes 19 are opened in the middle of both the first steel pipe pile 6 and the second steel pipe pile 7. The bolt 2 17 is threadedly connected to the middle of the bolt hole 19. A bolt 1 8 is assembled in the middle of the base 1. A nut 18 is assembled at one end of the bolt hole 19.

[0036] Specifically, by fitting the connecting ring 16 between steel pipe pile 6 and steel pipe pile 7, and then passing the bolt 17 through the middle of the connecting ring 16 and screwing it into the bolt hole 19 in the middle of steel pipe pile 6 and steel pipe pile 7, and tightening it with the nut 18 at one end of the bolt hole 19, the connection between the two is achieved. When the replacement device is running, the jack 5 applies pressure, and the pressure is transmitted through the bolt 8 in the middle of the base 1, ensuring that the pressure is stably transmitted from steel pipe pile 6 to steel pipe pile 7, so that the entire steel pipe pile structure is stably pressed down, simplifying the connection process and ensuring the continuity of construction.

Claims

1. A replacement device for a pit-type steel pipe static pressure pile, comprising a base (1), characterized in that: A fixed column (4) is fixedly connected to the top of the base (1). A reaction frame (3) is fixedly connected to the end of the fixed column (4) away from the base (1). A fixed module (14) is assembled between the base (1) and the reaction frame (3). A jack (5) is assembled on the side of the reaction frame (3) close to the base (1). A reinforcing component (9) is provided on the top of the base (1). A steel pipe pile one (6) is slidably connected to the middle of the base (1). A steel pipe pile two (7) is assembled at the end of the steel pipe pile one (6) away from the reaction frame (3). A connecting component (15) is provided between the steel pipe pile one (6) and the steel pipe pile two (7). An auxiliary component (20) is provided at the end of the steel pipe pile two (7) away from the steel pipe pile one (6). The reinforcing component (9) includes a connecting plate (10), which is fixedly connected to both ends of the fixing module (14). The base (1) is provided with fixing blocks (2) evenly on the side near the reaction frame (3), and a limit tube (13) is assembled in the middle of the base (1).

2. The underpinning device of a pit type steel pipe static pressure pile according to claim 1, characterized in that: The auxiliary component (20) includes a pile tip (21), which is located at the bottom end of the steel pipe pile (7), and a hole (22) is provided in the middle of the pile tip (21).

3. The underpinning device of a pit type steel pipe jacked pile according to claim 1, characterized in that: The connecting assembly (15) includes a connecting ring (16), which is sleeved between the first steel pipe pile (6) and the second steel pipe pile (7), and a bolt (17) is fitted in the middle of the connecting ring (16).

4. The underpinning device of a pit type steel pipe jacked pile according to claim 1, characterized in that: The fixed column (4) has a limiting groove (11) on one side near the steel pipe pile (6), and the connecting plate (10) is slidably connected to the middle of the connecting plate (10).

5. The underpinning device of a pit type steel pipe jacked pile according to claim 1, characterized in that: The steel pipe pile (6) is located in the middle of the fixed module (14), and the steel pipe pile (6) is slidably connected to the middle of the limiting tube (13).

6. The underpinning device of a pit type steel pipe jacked pile according to claim 1, characterized in that: The jack (5) is positioned between the reaction frame (3) and the connecting plate (10).

7. The underpinning device of a pit type steel pipe jacked pile according to claim 3, characterized in that: Both the first steel pipe pile (6) and the second steel pipe pile (7) have bolt holes (19) in the middle, and the second bolt (17) is threaded into the middle of the bolt hole (19).

8. The underpinning device of a pit type steel pipe jacked pile according to claim 7, characterized in that: The base (1) is fitted with a bolt (8) in the middle and a nut (18) is fitted at one end of the bolt hole (19).

Images