Pile feeder assembly with replaceable pile cap

Abstract

The pile feeder assembly with the replaceable pile cap comprises a dowel bar, the lower end of the dowel bar is connected with the pile cap, and a soil sealing device is arranged in the pile cap. An external thread is arranged on the outer wall of the lower end of the dowel bar; a connecting thread groove is formed in the center of the top of the pile cap in an inward concave mode, and internal threads are formed in the inner wall of the connecting thread groove; the soil sealing device comprises a sleeve with an opening in the upper end, and the upper edge of the sleeve extends outwards to form a circular-ring-shaped soil sealing plate; the sleeve can be arranged outside the connecting thread groove in a sleeving mode. The pile cap can be detached and replaced after being broken, and operation is convenient; the rod body of the dowel bar is provided with a graduated scale, so that the number of strikes can be conveniently recorded in the pile feeding process, and the rod body of the dowel bar is provided with an inclinometer, so that the inclination angle can be conveniently controlled when an inclined pile is fed; the annular pile pad is sleeved on the connecting thread groove, so that the pile pad can be conveniently fastened in the pile cap, and the pile pad can be effectively prevented from deviating and falling off; the soil sealing device can be automatically left on the pile top after pile feeding is finished, and pile top soil is effectively prevented from entering a pile core.

Description

Technical Field

[0001] The utility model belongs to the technical field of pile sinking construction of pipe piles in pile foundation projects, and in particular relates to a pile driver component with a replaceable pile cap. Background Art

[0002] The primary function of a pipe pile driver in a pile foundation project is to sink piles deeper. Traditional pile drivers typically deliver short, tool-type piles, typically 2 to 5 meters long and made of steel and hardwood. During the operation, the driver is placed atop the pile and hammers or statically presses the short, tool-type pile, driving the precast pile below the natural ground level to the designed elevation.

[0003] Traditional pile drivers lack scales or inclinometers, forcing construction workers to manually mark the scale and measure the inclination before driving the pile, recording the number of blows and depth. This is very cumbersome. The pile cap of a traditional pile driver is slightly larger than the diameter of the precast pile, allowing it to fit over the pile and prevent eccentric compression. However, when driving inclined piles, gravity often causes "flash" on the upper edge of the pile cap, shortening the life of the pile driver.

[0004] According to relevant pile foundation regulations, a pile pad should be installed inside the pile cap of the pile driver to prevent the pile top from contacting the pile cap diameter and causing damage to the pile top. To prevent the pile pad from falling, the pile pad diameter is usually slightly larger than the inner diameter of the pile cap to create a "locking" effect, but this approach is often not satisfactory.

[0005] To prevent soil from falling into the pile core after the precast pile is delivered to the designed elevation, a cover plate is typically used. To prevent the cover plate from shifting during delivery, it is traditionally welded to the top of the pile. This requires cutting tools to remove the cover plate before pouring the core concrete.

[0006] In order to solve the above problems existing in the prior art, we propose a pile driver assembly with a replaceable pile cap. Utility Model Content

[0007] The purpose of the utility model is to provide a pile driver assembly with a replaceable pile cap to solve the following problems existing in the prior art: after the pile cap of the pile driver is damaged, the pile driver cannot replace the pile cap in time to ensure construction efficiency; piles are not provided with a scale and an inclinometer, and can only be marked manually before use; the pile pad of the traditional pile driver is easy to fall off; the traditional soil sealing plate is not tight, or needs to be cut after the pile is delivered.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pile driver assembly with a replaceable pile cap includes a force transmission rod, the lower end of the force transmission rod is connected to the pile cap, and a matching earth sealing device is arranged inside the pile cap; an external thread is formed on the outer wall of the lower end of the force transmission rod; a connecting thread groove is recessed inwardly in the center of the top of the pile cap, and an internal thread is formed on the inner wall of the connecting thread groove; the earth sealing device includes a sleeve with an open upper end, and the upper edge of the sleeve extends outward to form an annular earth sealing plate; the sleeve can be fitted onto the outside of the connecting thread groove, and after fitting, the upper surface of the earth sealing plate fits with the top of the pile cap.

[0009] Furthermore, a scale is formed on the outer wall of the force transmission rod.

[0010] Furthermore, an inclinometer is installed in the middle of the force transmission rod.

[0011] Furthermore, a pile pad is provided between the pile cap and the earth sealing device. The pile pad is an annular structure with a center circle cut out, and the pile pad is sleeved outside the connecting thread groove.

[0012] Furthermore, the depth of the sleeve is greater than the depth of the connecting thread groove.

[0013] Furthermore, the pile cap has a diameter that gradually increases from the top to the bottom.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) The pile cap can be disassembled and replaced after being damaged, which is convenient for operation and prolongs the service life of the pile driver compared with the traditional pile driver;

[0016] (2) The pile pad is a ring structure with a center circle cut off. It is put on the connecting thread groove, and the inner diameter of the cut center circle is slightly smaller than the outer diameter of the connecting thread groove. This facilitates the fastening and installation of the pile pad in the pile cap, effectively preventing the pile pad from being displaced or falling off, and ensuring that the prefabricated pile is evenly stressed during the pile delivery process.

[0017] (3) The pile driver is equipped with a soil sealer that can automatically remain on the top of the pile after the pile is delivered, effectively preventing the soil on the top of the pile from entering the pile core. Before pouring the pile core concrete, you only need to take out the soil sealer, which is convenient and quick.

[0018] (4) The rod body is equipped with a scale to facilitate recording the number of hammer blows and the depth of hammer blows during the pile delivery process; the rod body is equipped with an inclinometer to facilitate the control of the inclination angle when delivering inclined piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the force transmission rod in the utility model;

[0020] Figure 2 It is a structural diagram of the pile cap in the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the pile pad in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the earth sealing device in the present utility model.

[0023] In the figure: 1. force transmission rod; 2. scale; 3. inclinometer; 4. external thread; 5. connecting thread groove; 6. pile cap; 7. pile pad; 8. earth cover plate; 9. sleeve. DETAILED DESCRIPTION

[0024] A preferred embodiment of the present invention will be described below in conjunction with the accompanying drawings to clearly and completely describe the technical solution in the preferred embodiment of the present invention.

[0025] See Figure 1-Figure 4 The utility model includes a force transmission rod 1, the lower end of the force transmission rod 1 is connected to a pile cap 6, a matching earth sealing device is provided in the pile cap 6, and a pile pad 7 is provided between the pile cap 6 and the earth sealing device.

[0026] The force transmission rod 1 is made of a steel column with relatively high rigidity. The force transmission rod 1 is divided into two parts, an upper part and an lower part. The lower part is provided with an external thread 4 for connecting to the pile cap 6.

[0027] The top center of the pile cap 6 is recessed with a connecting thread groove 5, the inner wall of which is provided with an internal thread for connecting with the external thread 4 at the bottom of the dowel rod 1. The diameter of the pile cap 6 gradually increases from top to bottom, i.e., the pile cap 6 is an open structure with a larger diameter at the bottom, which facilitates the entry of precast piles into the pile cap 6.

[0028] The function of the earth sealing device is to prevent the soil on the top of the pile from falling into the pile core after the pile is delivered. The earth sealing device is generally a basin-shaped structure, specifically including a sleeve 9 with an opening at the upper end, and the upper edge of the sleeve 9 extends outward to form an annular earth sealing plate 8; the sleeve 9 can be fitted on the outside of the connecting thread groove 5, and after fitting, the upper surface of the earth sealing plate 8 fits with the top of the pile cap 6. The depth of the sleeve 9 is slightly greater than the depth of the connecting thread groove 5, the purpose of which is to ensure that the sleeve 9 is not subjected to force during the hammering process, and only the annular earth sealing plate 8 on the upper part of the earth sealing device is subjected to force. The outer diameter of the sleeve 9 is smaller than the inner diameter of the precast pile core, so that the sleeve 9 can fall into the pile core. The outer diameter of the upper annular earth sealing plate 8 should be slightly smaller than the inner diameter of the pile cap 6, but should be larger than the inner diameter of the precast pile core, so that the earth sealing device and the pile driver can automatically separate after the pile is delivered without falling into the pile core.

[0029] The pile pad 7 is used to ensure uniform force on the top of the prefabricated pile during the pile delivery process. The pile pad 7 is an annular structure with a sheared center circle, and is sleeved outside the connecting thread groove 5. The inner diameter of the sheared center circle should be slightly smaller than the outer diameter of the connecting thread groove 5 to facilitate the fastening of the pile pad 7 inside the pile cap 6 after installation and prevent it from falling off freely. The material of the pile pad can be designed according to the requirements of the pile construction specifications.

[0030] In this embodiment, a scale 2 with a graduation value of 100 mm is engraved on the outer wall of the force transmission rod 1, which is convenient for recording the number of hits during the pile delivery process; an inclinometer 3 is installed in the middle of the force transmission rod 1. The inclinometer 3 is an electronic display screen with a display accuracy of 0.01°, which is convenient for controlling the inclination angle during inclined pile delivery.

[0031] The working process of this utility model is:

[0032] (1) Screw the lower part of the force transmission rod 1 into the connecting thread groove 5 of the pile cap 6 and firmly connect it to the pile cap 6 through the thread;

[0033] (2) Fit the pile pad 7 onto the connecting thread groove 5 of the pile cap 6;

[0034] (3) Place the sleeve 9 of the earth sealing device into the hollow pile core at the top of the pile to be sent, place the pile cap 6 on top of the earth sealing device, and let the connecting thread groove 5 fall into the sleeve 9. Then, the pile can be sent by hammering or static pressure on the force transmission rod 1. At this time, the top of the pile cap 6, the earth sealing plate 8 and the top of the prefabricated pile are respectively fitted together and bear the force together;

[0035] (4) After the pile delivery operation is completed, the pile delivery device is lifted and the soil sealing device automatically remains on the top of the pile.

[0036] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pile driver assembly with a replaceable pile cap, characterized by: It comprises a force transmission rod (1), the lower end of which is connected to a pile cap (6), and a matching earth sealing device is arranged in the pile cap (6); An external thread (4) is formed on the outer wall of the lower end of the force transmission rod (1); The top center of the pile cap (6) is inwardly recessed to form a connecting thread groove (5), and the inner wall of the connecting thread groove (5) is provided with an internal thread; The earth sealing device comprises a sleeve (9) with an opening at the upper end, and the upper edge of the sleeve (9) extends outward to form an annular earth sealing plate (8); the sleeve (9) can be fitted onto the outside of the connecting thread groove (5), and after fitting, the upper surface of the earth sealing plate (8) fits against the top of the pile cap (6).

2. The pile driver assembly with a replaceable pile cap according to claim 1, characterized in that: A scale (2) is formed on the outer wall of the force transmission rod (1).

3. The pile driver assembly with a replaceable pile cap according to claim 1, characterized in that: An inclinometer (3) is installed in the middle of the force transmission rod (1).

4. The pile driver assembly with a replaceable pile cap according to claim 1, characterized in that: A pile pad (7) is further provided between the pile cap (6) and the earth sealing device. The pile pad (7) is an annular structure with a center circle cut out. The pile pad (7) is sleeved outside the connecting thread groove (5).

5. The pile driver assembly with a replaceable pile cap according to claim 1, characterized in that: The depth of the sleeve (9) is greater than the depth of the connecting thread groove (5).

6. The pile driver assembly with a replaceable pile cap according to claim 1, characterized in that: The pile cap (6) has a diameter that gradually increases from the top to the bottom.

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