Reducing replacing and driving device suitable for large-diameter steel pipe pile sinking

Abstract

The utility model provides a variable-diameter driving device suitable for large-diameter steel pipe pile sinking, and relates to the field of steel pipe pile sinking. The variable-diameter driving device suitable for pile sinking of the large-diameter steel pipe pile comprises a driving part and a driving cap, the driving part is of a telescopic structure and comprises a plurality of driving cylinders with the diameters sequentially increased from inside to outside, the position heights and the self heights of the driving cylinders are sequentially decreased, and a buffering cushion with the circular section is installed on the driving part; according to the variable-diameter replacing and driving device suitable for large-diameter steel pipe pile sinking, for steel pipe piles with different diameters, all assemblies do not need to be completely disassembled like an assembly type replacing and driving device, the variable-diameter replacing and driving device can be rapidly matched with steel pipe piles with different pipe diameters only through stretching and retracting of a replacing and driving cylinder and adjustment of a buffering cushion, and when the large-diameter steel pipe piles are subjected to large-diameter steel pipe pile sinking, the whole replacing and driving piece is stretched; the outer-layer pile replacing barrel is matched with the steel pipe pile; and for a small-diameter steel pipe pile, the driven part is shrunk, the driven barrel with the proper diameter on the inner layer plays a role, and the adjusting time is greatly saved.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe pile driving, specifically a diameter-changing replacement device suitable for driving large-diameter steel pipe piles. Background Technology

[0002] Steel pipe pile driving is the construction process of driving or sinking steel pipe piles into the foundation soil. It is a common foundation engineering construction method, mainly used in projects with high requirements for foundation bearing capacity and stability, such as wharves, bridges, and high-rise buildings. In steel pipe pile driving construction, the replacement device is an important auxiliary equipment used to transfer the impact force of the pile hammer to the steel pipe pile. The variable diameter replacement device can be adjusted and adapted for large-diameter steel pipe piles of different diameters, solving the matching problem between the replacement device and the pile head when driving steel pipe piles of different diameters. It can effectively avoid problems such as unstable pile pad, uneven stress, and pile head explosion caused by large gaps, thus improving construction efficiency and quality stability.

[0003] Traditional variable diameter replacement devices, such as prefabricated replacement devices, can meet the construction needs of large-diameter steel pipe piles of different diameters when switching construction on the construction site. However, they require adjusting the position of each component and reassembling it one by one. According to on-site construction data, each adjustment takes 2-3 hours. If the project is large in scale and there are many types of steel pipe pile diameters, the frequent adjustment work can take up to several days, which seriously delays the overall construction progress. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a variable diameter replacement device suitable for driving large-diameter steel pipe piles, solving the problem of the long time required for the replacement device to adjust itself to adapt to large-diameter steel pipe piles of different diameters.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a variable diameter replacement device suitable for driving large-diameter steel pipe piles, comprising a replacement component and a replacement cap. The replacement component is a telescopic structure, comprising several replacement cylinders with progressively increasing diameters from the inside to the outside. The position height and height of the several replacement cylinders are progressively decreasing. A circular cross-section buffer pad is installed on the replacement component. The fixed end of the buffer pad is fixed to the innermost replacement cylinder, and its free end is used to move along the outermost replacement cylinder. The several replacement cylinders and the buffer pad together form a multi-layer nested structure.

[0006] Preferably, the cushioning pad is made of an elastic material.

[0007] Preferably, the number of replacement caps is set to several, the diameter of the several replacement caps increases sequentially, and the several replacement caps are respectively fixed to the upper end of several replacement cylinders.

[0008] Preferably, the position height of the plurality of replacement cylinders decreases sequentially, and the height of the plurality of replacement cylinders themselves decreases sequentially.

[0009] Preferably, each pair of adjacent replacement cylinders is connected by a threaded connection.

[0010] Preferably, a fixed insert rod is installed inside the innermost replacement cylinder, the bottom end of the insert rod is conical, and the fixed end of the buffer pad is fixedly connected to the outer surface of the insert rod.

[0011] Preferably, a fixing block is fixedly installed on the replacement cap corresponding to the outermost replacement cylinder, a threaded rod is rotatably connected inside the fixing block, and a ring-shaped connector is fixedly connected to the free end of the buffer pad. The connector is slidably connected to the outermost replacement cylinder, and the threaded rod is threadedly connected to the protruding part of the connector.

[0012] Compared with existing technologies, this utility model has the following advantages: It adopts a telescopic replacement component structure composed of several replacement cylinders with progressively increasing diameters. When dealing with steel pipe piles of different diameters, unlike prefabricated replacement devices, it eliminates the need for complete disassembly of each component. Instead, it allows for quick adaptation to different pipe diameters simply by extending and retracting the replacement cylinders and adjusting the buffer pads. For example, when encountering larger diameter steel pipe piles, the replacement component is extended as a whole to match the outer replacement cylinder with the steel pipe pile; for smaller diameter steel pipe piles, the replacement component is retracted to allow the inner replacement cylinder of the appropriate diameter to function, greatly saving adjustment time. It is also suitable for large-scale projects with a wide variety of steel pipe pile diameters. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a sectional view of the front view of the replacement cylinder of this utility model;

[0015] Figure 3 This is a cross-sectional view of the replacement casing of this utility model installed with a small-diameter steel pipe pile;

[0016] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0017] Figure 5 This is a cross-sectional view of the replacement casing of this utility model when it is installed with a large-diameter steel pipe pile;

[0018] Figure 6 This utility model Figure 5 Enlarged schematic diagram of the structure at point B;

[0019] Figure 7 This is a sectional view of the front view of the buffer pad of this utility model;

[0020] Figure 8 This is a top view of the buffer pad of this utility model.

[0021] The components include: 1. Replacement cylinder; 2. Replacement cap; 3. Buffer pad; 4. Insert rod; 5. Steel pipe pile; 6. Wooden pad; 7. Threaded rod; 8. Connecting parts. Detailed Implementation

[0022] like Figures 1-8 As shown, a variable-diameter replacement device suitable for driving large-diameter steel pipe piles includes a replacement component and replacement caps 2. The replacement component is a telescopic structure, comprising several replacement cylinders 1 with progressively increasing diameters from the inside to the outside. Each pair of adjacent replacement cylinders 1 is connected by a thread. A fixed insertion rod 4 is installed inside the innermost replacement cylinder 1, and the two are connected by a thread. The bottom end of the insertion rod 4 is conical. The fixed end of a buffer pad 3 is fixedly connected to the outer surface of the insertion rod 4. Several replacement caps 2 are provided, and the diameter of each replacement cap 2 is... The diameter increases sequentially, and several replacement caps 2 are fixed to the upper ends of several replacement cylinders 1. When one replacement cap 2 descends, it will collide with the next replacement cap 2. The position height of the several replacement cylinders 1 decreases sequentially, and the height of the several replacement cylinders 1 themselves decreases sequentially. A buffer pad 3 with a circular cross-section is installed on the replacement component, and the buffer pad 3 has a folded edge structure. The main body of the buffer pad 3 has a circular cross-section, and the folded edge is a structural extension based on the circular shape. The buffer pad 3 is made of elastic material, which can be made of thermoplastic elastomer material. The fixed end is fixed to the innermost replacement cylinder 1, and its free end is used to move along the outermost replacement cylinder 1. Several replacement cylinders 1, together with the buffer pad 3, form a multi-layer nested structure. The bottom edge of each replacement cylinder 1 is rounded. For steel pipe piles 5 of different diameters, the buffer pad 3 adjusts its contact position with steel pipe piles 5 of different sizes by the expansion and contraction of the replacement components to adapt to the outer diameter of steel pipe piles 5 of different diameters. A fixing block is fixedly installed on the replacement cap 2 corresponding to the outermost replacement cylinder 1, and the replacement cap 2 and the fixing block are integrally made. A threaded rod 7 is rotatably connected inside the block. A ring-shaped connector 8 is fixedly connected to the free end of the buffer pad 3. The connector 8 is slidably connected to the outermost replacement cylinder 1. The threaded rod 7 is threadedly connected to the protruding part of the connector 8. The threaded rod 7 can improve the stability of the free end of the buffer pad 3 and can also adjust the height of the connector 8 by rotating it, so that the buffer pad 3 can adjust the contact position with the steel pipe pile 5 according to the size requirements of different diameter steel pipe piles 5. A nut is installed at one end of the threaded rod 7 to further improve the stability between the threaded rod 7 and the connector 8.

[0023] In use, firstly, the steel pipe pile 5 to be driven is hoisted to the designated pile position, keeping the pile body vertical. A ring-shaped wooden pad 6, matching the thickness of the steel pipe pile 5, is then fixed to the pile head. Next, the replacement driving device is hoisted directly above the steel pipe pile 5 and slowly lowered, allowing the insert rod 4 inside the innermost replacement cylinder 1 to insert into the pre-reserved slot inside the pile head of the steel pipe pile 5. The conical shape of the bottom end of the insert rod 4 facilitates smooth insertion. The tight fit between the insert rod 4 and the slot in the pile head ensures the coaxiality of the replacement cylinder 1 and the steel pipe pile 5, reducing eccentric forces generated during subsequent hammering. Then, according to the diameter of the steel pipe pile 5, the threaded rod 7 is rotated. Through the threaded transmission between the threaded rod 7 and the free end connector 8 of the buffer pad 3, the connector 8 is driven to slide up and down along the outermost replacement cylinder 1, thereby adjusting the buffer pad 3 to a position compatible with the steel pipe pile 5. Figures 3-6 As shown, ensuring that the buffer pad 3 is in close contact with the inner and outer surfaces of the steel pipe pile 5, and that the buffer pad 3 is in close contact with the upper surface of the wooden pad 6, can improve the buffering capacity and also play a protective role.

[0024] Following the completion of the above preparations, the pile hammer is started, and the pile hammer strikes the uppermost replacement cap 2 with the set drop distance and hammering energy. During the hammering process, the replacement cap 2 transfers the hammering force to the corresponding replacement cylinder 1. The wooden pad 6 and the buffer pad 3 inside the replacement component play a buffering role, dispersing the hammering force and preventing the pile head of the steel pipe pile 5 from being damaged due to local stress concentration. At the same time, it guides the steel pipe pile 5 to gradually sink into the ground until the predetermined pile bottom elevation is reached or the corresponding final pile control standard is met.

[0025] Then immediately, as Figure 3 and Figure 4 As shown, when the size of the steel pipe pile 5 matches the innermost replacement cylinder 1, the insertion rod 4 is inserted into the interior of the replacement cylinder 1. When hammering, the innermost replacement cylinder 1 applies pressure to the buffer pad 3, the buffer pad 3 applies pressure to the wooden pad 6, and the wooden pad 6 transmits the hammering force to the steel pipe pile 5. For steel pipe piles 5 with larger diameters, the replacement cylinder 1 that matches it can be used as part of the hammering process for the steel pipe pile 5, such as... Figures 5-6As shown, since the height of the replacement cylinders 1 decreases sequentially, and the height of each replacement cylinder 1 decreases sequentially, and each pair of adjacent replacement cylinders 1 is connected by threads, by rotating the innermost replacement cylinder 1, the innermost replacement cylinder 1 contracts in a spiral rotation along the inner side of the adjacent replacement cylinder 1, causing the replacement cylinder 1 to drive its corresponding replacement cap 2 to fall onto the next replacement cap 2. At this time, combined with the threaded connection between the two replacement cylinders 1, a stable structure is formed between the two replacement caps 2 and the two replacement cylinders 1. It should be noted that by rotating the threaded rod 7, the ring-shaped connector 8 connected to the free end of the buffer pad 3 can be driven to slide along the outer wall of the outermost replacement cylinder 1 until the buffer pad 3 can tightly fit the steel pipe pile 5. Moreover, two of the replacement cylinders 1 will be located on the inner and outer sides of the steel pipe pile 5 respectively, forming a nested structure. The buffer pad 3 still maintains an inverted "U" shape. At this time, when the pile hammer is started for hammering, the hammering force The material is passed from the topmost replacement cap 2 to the next replacement cap 2, and then sequentially from the replacement cap 2 to the replacement cylinder 1, buffer pad 3, wooden pad 6, and finally the steel pipe pile 5 above it. Simultaneously, the nested structure of the multiple replacement cylinders 1 works synergistically to maintain their buffering and protective capabilities. Similarly, adjustments can be made according to the above method for steel pipe piles 5 of different diameters. In summary, the telescopic replacement component structure, composed of several replacement cylinders 1 with progressively increasing diameters, eliminates the need for complete disassembly of components like prefabricated replacement devices when dealing with steel pipe piles 5 of different diameters. It allows for quick adaptation to different pipe diameters simply by extending and retracting the replacement cylinders 1 and adjusting the buffer pad 3. For example, when encountering a larger diameter steel pipe pile 5, the entire replacement component is extended to match the outer replacement cylinder 1 with the steel pipe pile 5; for a smaller diameter steel pipe pile 5, the replacement component is retracted to allow the inner replacement cylinder 1 of the appropriate diameter to function, significantly saving adjustment time. This approach is also suitable for large-scale projects with various diameters of steel pipe piles 5.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable-diameter replacement driving device suitable for driving large-diameter steel pipe piles, comprising a replacement driving part and a replacement driving cap (2), characterized in that: The replacement part is a telescopic structure. The replacement part includes several replacement cylinders (1) with increasing diameter from the inside to the outside. The position height and height of the several replacement cylinders (1) decrease sequentially. A buffer pad (3) with a circular cross-section is installed on the replacement part. The fixed end of the buffer pad (3) is fixed to the innermost replacement cylinder (1), and its free end is used to move along the outermost replacement cylinder (1). The several replacement cylinders (1) and the buffer pad (3) form a multi-layer nested structure.

2. The variable diameter replacement device for driving large-diameter steel pipe piles according to claim 1, characterized in that: The buffer pad (3) is made of elastic material.

3. The variable-diameter pile-driving device for large-diameter steel pipe piles according to claim 1, characterized in that: The number of the replacement caps (2) is set to several, the diameter of the several replacement caps (2) increases sequentially, and the several replacement caps (2) are respectively fixed to the upper end of several replacement cylinders (1).

4. A variable diameter replacement device for driving large-diameter steel pipe piles according to claim 1, characterized in that: Each pair of adjacent replacement cylinders (1) is connected by a thread.

5. A variable diameter replacement device for driving large-diameter steel pipe piles according to claim 1, characterized in that: The innermost replacement cylinder (1) is equipped with a fixed insertion rod (4), the bottom end of which is conical, and the fixed end of the buffer pad (3) is fixedly connected to the outer surface of the insertion rod (4).

6. A variable diameter replacement device for driving large-diameter steel pipe piles according to claim 1, characterized in that: A fixing block is fixedly installed on the replacement cap (2) corresponding to the outermost replacement cylinder (1). A threaded rod (7) is rotatably connected inside the fixing block. A ring-shaped connector (8) is fixedly connected to the free end of the buffer pad (3). The connector (8) is slidably connected to the outermost replacement cylinder (1). The threaded rod (7) is threadedly connected to the protruding part of the connector (8).

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