A pile head protection device for high strain dynamic testing of piles

Abstract

This utility model relates to the field of pile testing technology and discloses a pile head protection device for high strain testing of piles. The device includes a pile head protection component, with a rubber pad at the top. The component includes a left-side protective sleeve with flanges welded to both ends. The outer walls of the left-side protective sleeve and its flanges are reinforced by welding with left triangular stiffening ribs. By using the pile head protection component and the top rubber pad, the pile head can be protected during high strain testing, preventing impact damage. The left and right protective sleeves are connected by bolts to form a ring, providing lateral protection for the pile head. The top rubber pad protects the top of the pile head, acting as a buffer when the device is impacted, thus improving the protection capability during high strain testing. It also serves as a pile pad, reducing stress wave frequency and extending the stress wave's duration within the pile during high strain testing.

Description

Technical Field

[0001] This utility model relates to the field of pile testing technology, and in particular to a pile head protection device for high strain testing of piles. Background Technology

[0002] During high-strain testing of prestressed concrete pipe piles, the pile top is subjected to instantaneous concentrated dynamic loads. Excessive or uneven stress often leads to pile head damage, causing abnormal signals from the strain sensors. This results in inaccurate or unobtainable data for the vertical compressive bearing capacity and pile integrity of the single pile during high-strain testing. In severe cases, falling debris can damage the sensors and data cables. If the pile head is damaged, repair and reinforcement are necessary to continue testing the pile's bearing capacity and integrity, causing not only economic losses but also extending the pile foundation testing period.

[0003] Therefore, we propose a pile head protection device for high strain testing of foundation piles. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a protective device for the pile head during high strain testing of foundation piles that can be quickly installed and dismantled, is easy to construct, and can be reused. This solves the problem that the pile head is easily damaged during high strain testing of prestressed pipe piles, leading to inaccurate test data and damage to the sensor. At the same time, the use of a matching rubber pad layer is beneficial to further protect the pile head and adjust the waveform of the impact stress wave.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a pile head protection device for high strain testing of foundation piles, comprising a pile head protection component, wherein a top rubber pad is provided on the top of the pile head protection component, the pile head protection component includes a left protective sleeve, a left protective sleeve flange is fixedly installed on the right side of the outer wall of the left protective sleeve, a left triangular stiffening rib is fixedly installed on the left side of the left protective sleeve flange, and the outer wall of the left triangular stiffening rib is fixedly connected to the outer wall of the left protective sleeve, a connecting bolt is provided on the side wall of the left protective sleeve flange, a right protective sleeve flange is movably installed on the right side of the outer wall of the connecting bolt, a right protective sleeve is fixedly installed on the outer wall of the right protective sleeve flange, and the top rubber pad includes a circular rubber pad, wherein the concave notch of the circular rubber pad is movably connected to the top of the left and right protective sleeves through a left hanging member and a right hanging member.

[0006] Preferably, a right triangular stiffening rib is fixedly installed on the outer wall of the right-side casing, and the left side of the right triangular stiffening rib is fixedly connected to the right side of the right-side casing flange.

[0007] Preferably, a left connecting component is provided at the middle of the left side wall of the left casing, and a right connecting component is provided at the middle of the right side wall of the right casing, and the structure of the right connecting component is the same as that of the left connecting component.

[0008] Preferably, a left-side hanging piece is fixedly installed on the top of the left-side protective sleeve, and a right-side hanging piece is fixedly installed on the top of the right-side protective sleeve.

[0009] Preferably, the left connecting component includes a lifting lug, and the right side wall of the lifting lug is fixedly connected to the middle of the left side wall of the left protective sleeve.

[0010] Preferably, a lifting component is movably installed on the left side of the outer wall of the lifting lug, and a fixing bolt is provided at the lower end of the lifting component.

[0011] Preferably, the middle end of the outer wall of the fixing bolt is movably connected to the left side of the inner wall of the lifting lug, and a nylon lifting rope is provided on the upper end of the inner wall of the lifting component.

[0012] This utility model provides a pile head protection device for high strain testing of foundation piles. It has the following beneficial effects:

[0013] 1. This high-strain testing pile head protection device, by setting up a pile head protection component and a top rubber pad, can protect the pile head during use, avoiding impact damage during testing. The left and right protective sleeves are connected by bolts to form a ring to protect the pile head laterally, while the top rubber pad protects the top of the pile head and acts as a buffer when the device is impacted, improving the protective capability of the device during high-strain testing. It can also serve as a pile pad to reduce the stress wave frequency and prolong the stress wave's duration of action in the pile during high-strain testing.

[0014] 2. This pile head protection device for high strain testing of foundation piles, by setting left triangular stiffening ribs and right triangular stiffening ribs, can reinforce the left and right protective casings respectively, avoid deformation of the left and right protective casings due to impact, and improve the protective performance of the device.

[0015] 3. This pile head protection device for high strain testing of foundation piles, by setting left and right hanging parts, can position the circular rubber pad and prevent it from shifting during high strain testing, thus increasing the stability of the device. At the same time, the left and right hanging parts can be used for initial fixing during the installation of the protection device, increasing the convenience of installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the front structure of the pile head protection component of this utility model;

[0018] Figure 3This is a schematic diagram of the top rubber pad structure of this utility model.

[0019] Legend: 10. Pile head protection assembly; 11. Top rubber pad; 12. Left side casing; 13. Left side casing flange; 14. Left triangular stiffening rib; 15. Connecting bolt; 16. Right side casing flange; 17. Right side casing; 18. Right triangular stiffening rib; 19. Left side connecting assembly; 20. Right side connecting assembly; 21. Left side hanger; 22. Right side hanger; 23. Lifting lug; 24. Lifting component; 25. Fixing bolt; 26. Nylon lifting rope. Detailed Implementation

[0020] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the embodiments of this utility model, it should be noted that the terms "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model embodiment, it should also be noted that the connection between the protective sleeve and the sleeve flange and stiffening rib is welded, and the left and right sleeves are bolted together to form a whole. Those skilled in the art can understand the specific meaning of the above terms in this utility model embodiment according to the specific circumstances.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: A pile head protection device for high strain testing of foundation piles, such as... Figures 1-2 As shown, the system includes a pile head protection assembly 10, with a top rubber pad 11 on top. The assembly includes a left-side casing 12, a left-side casing flange 13 fixedly welded to the right side of its outer wall, and a left triangular stiffening rib 14 fixedly welded to the left side of the left-side casing flange 13. The outer wall of the left triangular stiffening rib 14 is welded to the outer wall of the left-side casing 12. A connecting bolt 15 is provided on the inner wall of the left-side casing flange 13, and a right-side casing flange 16 is movably installed on the right side of the outer wall of the connecting bolt 15. A right-side casing flange 16 is fixedly installed on the outer wall of the right-side casing flange 16. The outer wall of the right-side casing 17 is fixedly welded with a right triangular stiffening rib 18, and the left side of the right triangular stiffening rib 18 is welded to the right side of the right-side casing flange 16. By setting the pile head protection component 10 and the top rubber pad 11, the pile head of the foundation pile can be protected during use to avoid impact damage during the testing process. The left-side casing 12 and the right-side casing 17 can protect the two sides of the pile head, and the top rubber pad 11 can protect the top of the pile head, further improving the protection of the device. The overall structure is simple and easy to assemble and disassemble, meeting the requirements of high strain testing of foundation piles.

[0027] Example 2: Based on Example 1, as follows Figure 2 As shown, a left connecting component 19 is provided at the middle of the left side wall of the left casing 12, and a right connecting component 20 is provided at the middle of the right side wall of the right casing 17. The structure of the right connecting component 20 is the same as that of the left connecting component 19. A left hanging piece 21 is fixedly installed on the top of the left casing 12, and a right hanging piece 22 is fixedly installed on the top of the right casing 17. The left connecting component 19 includes a lifting lug 23, and the right side wall of the lifting lug 23 is fixedly connected to the middle of the left side wall of the left casing 12. Next, a lifting member 24 is movably installed on the left side of the outer wall of the lifting lug 23. A fixing bolt 25 is provided at the lower end of the lifting member 24, and the middle end of the outer wall of the fixing bolt 25 is movably connected to the left side of the inner wall of the lifting lug 23. A nylon lifting rope 26 is provided at the upper end of the inner wall of the lifting member 24. By setting the left triangular stiffening rib 14 and the right triangular stiffening rib 18, the left protective cylinder 12 and the right protective cylinder 17 can be reinforced respectively, so as to prevent the left protective cylinder 12 and the right protective cylinder 17 from deforming due to impact, thereby improving the protective performance of the device.

[0028] Example 3: Based on Examples 1 and 2, as follows... Figure 3 As shown, the concave notch of the top rubber pad 11 is movably connected to the top of the left casing 12 and the right casing 17 via the left hanger 21 and the right hanger 22. By setting the left hanger 21 and the right hanger 22, on the one hand, it is convenient to install the casing. For small and medium diameter pipe piles, installation can be carried out without the aid of machinery, and there is no need to use an excavator to lift them continuously during the installation process. On the other hand, it can position the top rubber pad 11 to prevent the circular rubber pad 11 from shifting during high strain testing, thereby increasing the stability of the device.

[0029] The working principle of this utility model:

[0030] In use, the protective device is first hoisted using the lifting member 24 and nylon rope 26. The left and right hanging members 21 and 22 are then used to initially fix the protective device to the top of the foundation pile, and the connecting bolts 15 complete the final fixation. When the high-strain testing hammer strikes, the top rubber pad 11 buffers the impact force and prevents stress concentration caused by direct contact between the pile head and the hammer. The ring-shaped structure formed by the bolted connection of the left and right casings 12 and 17 strictly limits the lateral displacement of the pile head, thus protecting the prestressed concrete pile head from damage. The left triangular stiffening rib 14 and right triangular stiffening rib 18 enhance the structural strength of the protective cover and improve the durability of the device. The connecting bolts 15 facilitate the connection and disassembly between the left and right casing flanges 13 and 16, simplifying assembly and maintenance. The left and right hanging members 21 and 22 ensure that the circular rubber pad 11 is stably fixed to the top of the protective cover, improving the stability of the device.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pile head protection device for high strain testing of foundation piles, comprising a pile head protection component (10), characterized in that: The top of the pile head protection component (10) is provided with a rubber pad (11). The pile head protection component (10) includes a left protective sleeve (12). The two ends of the left protective sleeve (12) are welded with left protective sleeve flanges (13). The left side wall of the left protective sleeve flange (13) is welded with a left triangular stiffening rib (14), and the outer wall of the left triangular stiffening rib (14) is welded to the outer wall of the left protective sleeve (12). The inner wall of the left protective sleeve flange (13) is provided with a connecting bolt (15). The right side of the outer wall of the connecting bolt (15) is movably installed with a right protective sleeve flange (16). The outer wall of the right protective sleeve flange (16) is fixedly installed with a right protective sleeve (17). The concave notch of the top rubber pad (11) is movably connected to the top of the left protective sleeve (12) and the right protective sleeve (17) through a left hanging piece (21) and a right hanging piece (22).

2. The pile head protection device for high strain testing of foundation piles according to claim 1, characterized in that: The outer wall of the right-side casing (17) is welded with a right triangular stiffening rib (18), and the left side of the right triangular stiffening rib (18) is welded to the right side of the right-side casing flange (16).

3. The pile head protection device for high strain testing of foundation piles according to claim 1, characterized in that: The left side of the left sleeve (12) is provided with a left connecting component (19) at the middle of the left side wall, and the right side of the right sleeve (17) is provided with a right connecting component (20) at the middle of the right side wall, and the structure of the right connecting component (20) is the same as that of the left connecting component (19).

4. The pile head protection device for high strain testing of foundation piles according to claim 1, characterized in that: The top of the left protective sleeve (12) is fixedly welded with a left hanging piece (21), and the top of the right protective sleeve (17) is fixedly welded with a right hanging piece (22).

5. The pile head protection device for high strain testing of foundation piles according to claim 3, characterized in that: The left connecting component (19) includes a lifting lug (23), and the right side wall of the lifting lug (23) is fixedly connected to the middle of the left side wall of the left protective sleeve (12).

6. The pile head protection device for high strain testing of foundation piles according to claim 5, characterized in that: A lifting member (24) is movably installed on the left side of the outer wall of the lifting lug (23), and a fixing bolt (25) is provided at the lower end of the lifting member (24).

7. The pile head protection device for high strain testing of foundation piles according to claim 6, characterized in that: The middle of the outer wall of the fixing bolt (25) is movably connected to the left side of the inner wall of the lifting lug (23), and a nylon lifting rope (26) is provided on the upper end of the inner wall of the lifting component (24).

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