Pile foundation detection device for civil engineering

Abstract

The utility model belongs to the technical field of pile foundation detection, and particularly relates to a pile foundation detection device for civil engineering, which comprises a hammerhead cylinder, a hammerhead sleeve is inserted and clamped on the lower side of the inner side of the hammerhead cylinder, a hammerhead is arranged on the lower side of the hammerhead sleeve, a pressure sensor is arranged on the upper side of the hammerhead sleeve, and the pressure sensor is arranged on the inner side of the hammerhead cylinder. And a handle barrel is arranged on one side of the hammer head barrel. The hammer head reversely impacts the hammer head sleeve at the moment of knocking, the hammer head sleeve reversely extrudes the pressure sensor, after the pressure sensor detects pressure, a signal is transmitted to the PLC control circuit through the connecting line, the PLC control circuit processes the signal and transmits the signal to the control panel, and the control panel displays a pressure value, namely a hammering force value, through the display screen. The knocking force value can be accurately displayed, a user can conveniently control the knocking force according to numerical value comparison, after the accurate concept is achieved, the force is more easily regulated and controlled, the approximate force value is more easily obtained through multiple times of knocking detection, and the force deviation is conveniently regulated, controlled and reduced.

Description

Technical Field

[0001] This utility model belongs to the field of pile foundation testing technology, specifically relating to a pile foundation testing device for civil engineering. Background Technology

[0002] Low-strain testing involves striking the top of the pile with a small hammer. A sensor attached to the pile top receives stress wave signals from within the pile. Stress wave theory is then used to study the dynamic response of the pile-soil system, and the measured velocity and frequency signals are analyzed to determine the pile's integrity. When striking the pile top with the hammer, the force must be uniform and moderate; too much or too little force will prevent effective measurement. Currently, the force used to strike the pile top is generally controlled by feel, lacking a precise understanding of the appropriate force. Since multiple strikes are required for pile top testing, relying solely on feel can lead to significant force deviations and make precise manual control difficult. Utility Model Content

[0003] To address the above problems, the purpose of this utility model is to provide a pile foundation testing device for civil engineering, which solves the problem that when hammering the top of the pile with a small hammer, the force must be uniform and moderate, neither too large nor too small, otherwise effective measurement cannot be performed. Currently, the force of hammering the top of the pile is generally controlled by feeling, without a precise concept of the hammering force. When testing the top of the pile, multiple hammering tests are required. Relying solely on feeling to control the force can easily lead to significant force deviations and make it difficult to precisely control the force manually.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a pile foundation testing device for civil engineering, comprising a hammer head cylinder, a hammer head sleeve inserted and snapped into the lower inner side of the hammer head cylinder, a hammer head disposed on the lower side of the hammer head sleeve, a pressure sensor disposed on the upper side of the hammer head sleeve, the pressure sensor being disposed inside the hammer head cylinder, a handle cylinder disposed on one side of the hammer head cylinder, a control device disposed on the upper side of the handle cylinder, a battery disposed inside the handle cylinder, the control device comprising a control board, buttons, a display screen and a PLC control circuit, the PLC control circuit being connected by a connecting wire, the connecting wire passing through the handle cylinder to the inner side of the hammer head cylinder and being inserted into the pressure sensor, and a handle disposed on the side of the handle cylinder away from the hammer head cylinder.

[0005] The beneficial effects of this utility model are as follows: the hammerhead impacts the hammerhead sleeve in the instant of striking, and the hammerhead sleeve squeezes the pressure sensor in the reverse direction. After the pressure sensor detects the pressure, it transmits the signal to the PLC control circuit through the connecting wire. After the PLC control circuit processes the signal, it transmits it to the control board. The control board displays the pressure value, i.e. the hammering force value, on the display screen. It can accurately display the hammering force value, making it convenient for users to control the hammering force by comparing the value. With a precise concept, it is easier to adjust the force. Multiple hammering tests make it easier to strike a similar force value, which is convenient for adjusting and reducing force deviation.

[0006] For ease of battery replacement;

[0007] As a further improvement to the above technical solution: a copper contact plate is provided on the inner side of the handle below the control device, the battery is pressed against the copper contact plate, the handle is threadedly connected to the grip, and a spring is provided on the inner side of the grip near the battery.

[0008] The beneficial effect of this improvement is that the battery can be a disposable battery, which makes it easy to replace the battery.

[0009] To increase grip comfort;

[0010] As a further improvement to the above technical solution: a rubber sleeve is fitted onto the outer side of the grip.

[0011] The beneficial effect of this improvement is that it increases the comfort of holding the device.

[0012] To facilitate quick replacement of the hammerhead;

[0013] As a further improvement to the above technical solution: the hammer head is inserted into the lower side of the hammer head sleeve, and the lower inner side of the hammer head sleeve is a rubber surface layer.

[0014] The beneficial effect of this improvement is that when testing different pile foundations, it is sometimes necessary to change different hammers. By pulling the hammer out of the hammer head sleeve, it is easy to quickly change the hammer head.

[0015] To repair the protruding concrete and mud blocks;

[0016] As a further improvement to the above technical solution: a circular block is threaded on the upper side of the hammer cylinder, and a chisel rod is provided on the upper side of the circular block. The circular block is pressed against the pressure sensor.

[0017] The beneficial effects of this improvement are as follows: the round block is unscrewed to inspect and maintain the pressure sensor inside the hammer cylinder. When installing the probe, it is necessary to keep the surface of the pile top flat. Sometimes it is necessary to manually adjust the position of the probe installation. By using the reverse holding device and chisel rod, some of the protruding concrete and mud blocks can be trimmed.

[0018] To limit the position of the pressure sensor;

[0019] As a further improvement to the above technical solution: a limiting ring is provided on the upper side of the hammer head sleeve, and the pressure sensor is located inside the limiting ring.

[0020] The beneficial effect of this improvement is that it limits the position of the pressure sensor and prevents the pressure sensor from shifting.

[0021] To clean the dust from where the probe is installed;

[0022] As a further improvement to the above technical solution: the grip is evenly provided with bristles on the side away from the handle.

[0023] The beneficial effects of this improvement are: it can clean the dust at the probe installation site and promote the adhesion of the probe to the top of the pile through the coupling agent.

[0024] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the connection structure of the hammer head cylinder in this utility model;

[0027] Figure 3 This is an internal sectional view of the connecting structure of the hammer head cylinder in this utility model;

[0028] Figure 4 This is a cross-sectional view of the inner structure of the grip in this utility model;

[0029] In the diagram: 1. Hammer head cylinder; 2. Hammer head sleeve; 3. Hammer head; 4. Pressure sensor; 5. Handle cylinder; 6. Control device; 7. Connecting wire; 8. Copper contact plate; 9. Battery; 10. Handle; 11. Spring; 12. Rubber sleeve; 13. Brush bristles; 14. Round block; 15. Chisel rod; 16. Restricting ring. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0031] like Figure 1 — Figure 4As shown: A pile foundation testing device for civil engineering includes a hammer cylinder 1. A hammer sleeve 2 is inserted and snapped into the lower inner side of the hammer cylinder 1. A hammer 3 is disposed on the lower side of the hammer sleeve 2. A pressure sensor 4 is disposed on the upper side of the hammer sleeve 2. The pressure sensor 4 is disposed inside the hammer cylinder 1. A handle 5 is disposed on one side of the hammer cylinder 1. A control device 6 is disposed on the upper side of the handle 5. A battery 9 is disposed inside the handle 5. The control device 6 includes a control board, buttons, a display screen, and a PLC control circuit. A connecting wire 7 is connected to the PLC control circuit. The connecting wire 7 passes through the handle 5 to the inner side of the hammer cylinder 1 and is inserted into the pressure sensor 4. A handle 10 is provided on the side away from the hammer head cylinder 1. When the hammer head 3 strikes, it impacts the hammer head sleeve 2 in the reverse direction. The hammer head sleeve 2 then presses against the pressure sensor 4. After detecting the pressure, the pressure sensor 4 transmits the signal to the PLC control circuit via the connecting wire 7. The PLC control circuit processes the signal and transmits it to the control board. The control board displays the pressure value, i.e., the hammering force value, on the display screen. This allows for precise display of the striking force value, facilitating user control of the striking force based on the value. With this precise understanding, it is easier to adjust the force. Multiple strikes are more likely to produce a similar force value, making it easier to adjust and reduce force deviation. A handle 10 is provided on the inner side of the handle cylinder 5 below the control device 6. A copper contact plate 8 is formed, with the battery 9 pressed against it. The handle 5 is threadedly connected to the grip 10. A spring 11 is provided on the inner side of the grip 10 near the battery 9. The battery 9 can be a disposable battery for easy replacement. A rubber sleeve 12 is fitted onto the outer side of the grip 10 to increase grip comfort. The hammer head 3 is inserted into the lower side of the hammer head sleeve 2. The inner side of the lower side of the hammer head sleeve 2 is a rubber surface layer. When testing different pile foundations, it is sometimes necessary to change different hammer heads 3. By pulling the hammer head 3 out of the hammer head sleeve 2, it is easy to quickly change the hammer head 3. A round block 14 is threaded on the upper side of the hammer head cylinder 1, and a chisel rod 15 is provided on the upper side of the round block 14. The circular block 14 is pressed against the pressure sensor 4. Unscrewing the circular block 14 is used to inspect and maintain the pressure sensor 4 inside the hammer head cylinder 1. When installing the probe, it is necessary to keep the surface of the pile top flat. Sometimes it is necessary to manually adjust the position of the probe installation. Using the reverse holding device and the chisel rod 15, some of the protruding concrete and mud can be trimmed. A limiting ring 16 is provided on the upper side of the hammer head sleeve 2. The pressure sensor 4 is located inside the limiting ring 16 to limit the position of the pressure sensor 4 and prevent the pressure sensor 4 from shifting. The handle 10 is evenly provided with bristles 13 on the side away from the handle cylinder 5, which can clean the dust at the probe installation location and promote the probe to adhere to the pile top through the coupling agent.

[0032] Working principle and usage process of this utility model:

[0033] When in use, hold the handle 10, zero the pressure sensor 4 using the button, and strike the top of the pile vertically. After striking, quickly lift the hammer. The hammer head 3 will impact the hammer head sleeve 2 in the reverse direction, which in turn squeezes the pressure sensor 4. After detecting the pressure, the pressure sensor 4 transmits the signal to the PLC control circuit through the connecting wire 7. The PLC control circuit processes the signal and transmits it to the control board. The control board displays the pressure value, i.e., the hammering force value, on the display screen. This allows for precise display of the striking force value, making it easier for the user to control the striking force based on the value. With a precise understanding, it is easier to adjust the force. Multiple strikes make it easier to achieve a similar force value, facilitating adjustment and reducing force deviation. In addition, during use, a copper contact plate 8 is provided on the inner side of the handle 5 below the control device 6. The battery 9 is pressed against the copper contact plate 8. The handle 5 is threaded to the handle 10. A spring 11 is provided on the inner side of the handle 10 near the battery 9. The battery 9 can be a disposable battery for easy replacement. A rubber sleeve 12 is fitted onto the outer side of the handle 10 to increase grip comfort. Furthermore, during use, the hammer head 3 is inserted into the lower side of the hammer head sleeve 2. The inner lower side of the hammer head sleeve 2 has a rubber surface layer. When testing different pile foundations, it is sometimes necessary to change different hammer heads 3. Pulling the hammer head 3 out of the hammer head sleeve 2 facilitates quick replacement. Additionally, during use, a round block 14 is threaded onto the upper side of the hammer head cylinder 1, and a chisel rod 15 is mounted on the upper side of the round block 14. The round block 14 is pressed against the pressure sensor 4. Unscrewing the round block 15... 4 is used for testing and maintenance of the pressure sensor 4 inside the hammer cylinder 1. When installing the probe, it is necessary to keep the surface of the pile top flat. Sometimes it is necessary to manually adjust the position of the probe installation. Using the reverse holding device and the chisel rod 15, some of the protruding concrete and mud can be trimmed. In addition, a limiting ring 16 is set to limit the position of the pressure sensor 4 and prevent the pressure sensor 4 from shifting. In addition, when in use, a brush bristle 13 is set to clean the dust at the probe installation location and promote the probe to adhere to the pile top through the coupling agent.

[0034] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A pile foundation testing device for civil engineering, characterized in that: The device includes a hammer head cylinder (1), a hammer head sleeve (2) is inserted and snapped into the lower inner side of the hammer head cylinder (1), a hammer head (3) is provided on the lower side of the hammer head sleeve (2), a pressure sensor (4) is provided on the upper side of the hammer head sleeve (2), the pressure sensor (4) is located inside the hammer head cylinder (1), a handle cylinder (5) is provided on one side of the hammer head cylinder (1), a control device (6) is provided on the upper side of the handle cylinder (5), a battery (9) is provided inside the handle cylinder (5), the control device (6) includes a control board, buttons, a display screen and a PLC control circuit, the PLC control circuit is connected by a connecting wire (7), the connecting wire (7) passes through the handle cylinder (5) to the inner side of the hammer head cylinder (1) and is inserted into the pressure sensor (4), and a handle (10) is provided on the side of the handle cylinder (5) away from the hammer head cylinder (1).

2. The pile foundation testing device for civil engineering according to claim 1, characterized in that: A copper contact plate (8) is provided on the inner side of the handle (5) below the control device (6). The battery (9) is pressed against the copper contact plate (8). The handle (5) is threadedly connected to the grip (10). A spring (11) is provided on the inner side of the grip (10) near the battery (9).

3. The pile foundation testing device for civil engineering according to claim 1, characterized in that: A rubber sleeve (12) is fitted onto the outer side of the grip (10).

4. The pile foundation testing device for civil engineering according to claim 1, characterized in that: The hammer head (3) is inserted into the lower side of the hammer head sleeve (2), and the lower inner side of the hammer head sleeve (2) is a rubber surface layer.

5. The pile foundation testing device for civil engineering according to claim 1, characterized in that: The upper side of the hammer cylinder (1) is threaded with a round block (14), and the upper side of the round block (14) is provided with a chisel rod (15). The round block (14) is pressed against the pressure sensor (4).

6. The pile foundation testing device for civil engineering according to claim 1, characterized in that: A limiting ring (16) is provided on the upper side of the hammer head sleeve (2), and the pressure sensor (4) is located inside the limiting ring (16).

7. The pile foundation testing device for civil engineering according to claim 1, characterized in that: The grip (10) is provided with bristles (13) evenly on the side away from the handle (5).

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