CN218622158U

CN218622158U - Pile foundation low strain detection automatic hammering device

Info

Publication number: CN218622158U
Application number: CN202222697663.6U
Authority: CN
Inventors: 王兆亮; 周晓方
Original assignee: Huaian Construction Engineering Quality Inspection Center Co ltd
Current assignee: Huaian Construction Engineering Quality Inspection Center Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-03-14
Anticipated expiration: 2032-10-13

Abstract

The utility model discloses a pile foundation low strain detection automatic hammering device, which comprises a control box with a vertical channel, an exciting hammer slidably arranged in the vertical channel, a telescopic support rod arranged below the control box and a driving lever horizontally arranged in the control box; the shock excitation hammer comprises a hammer rod positioned in the vertical channel and a hammer head arranged at the lower end of the hammer rod, wherein the hammer rod is provided with ratchets, the ratchets are downward, and an electric ratchet wheel meshed with the ratchets on the hammer rod is arranged in the control box; the diameter of the vertical channel is larger than that of the hammer rod, and a shifting fork is arranged on the shifting rod and close to the hammer rod. The height of the device is set through the telescopic supporting rod, then the electric ratchet wheel lifts the height of the vibration hammer, and finally the hammer rod is pushed away from the electric ratchet wheel through the shifting fork for the shifting rod, so that the vibration hammer freely falls to pound and hit the pile foundation, the same point on the pile foundation can be pounded and hit by the vibration hammer under the same height for multiple times, waveforms with consistent waveform conditions and comparability can be obtained, artificial errors are eliminated, and the detection precision is improved.

Description

Pile foundation low strain detection automatic hammering device

Technical Field

The utility model relates to a foundation engineering field, in particular to measure hammering device.

Background

In the field of foundation engineering detection, methods for detecting integrity of a pile body include a low-strain method, a high-strain method, a core drilling method, an acoustic wave transmission method and the like, wherein the low-strain method is the most commonly used method at home and abroad. The method is based on a one-dimensional linear elasticity theory, adopts a transient hammering mode, and judges the integrity of a pile body of a pile foundation by actually measuring a pile top acceleration or speed response time domain curve.

In engineering practice, a low strain method is used as a common means for detecting the integrity of a pile body. The existing detection personnel hold the vibration hammer to carry out hammering operation, the operation mode has large influence of human factors, the waveform acquired by the same field or single body is too many, numerous and complicated and incomparable, a large amount of time is needed to analyze and compare the acquired waveform data, and as a result, the accuracy is low, when the data has a large difference, the data also needs to enter the field to be retested again, the working efficiency is influenced, the project progress is slowed down, and the cost is increased. Secondly, waveform analysis without contrast also requires experiential detection personnel to keep track of, increasing the labor cost. Finally, the labor intensity of personnel is high in the mode of holding the vibration hammer for hammering.

Therefore, a controllable automatic hammering system is needed, the same hammering height and the same hammering force are adopted, different hammering points of the same pile foundation or different pile foundations in the same field are observed, the consistency of waveform conditions is obtained, the comparability of waveforms is realized, the human error is eliminated, and the detection accuracy is improved. The utility model discloses having made clear of same hammering condition promptly, having eliminated the influence of human factor, being favorable to the measurement personnel can judge unusual wave form fast when the analytical data, find out the regularity of each stake signal under the similar condition in same place, the pile foundation construction quality of quick evaluation project.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pile foundation hangs down and meets an emergency and detects automatic hammering device can carry out a lot of hammering with the same hammering power to same hammering point on the pile foundation labour saving and time saving, obtains the wave form condition unanimous, has comparable wave form to eliminate human error, improve and detect the precision.

The utility model discloses a following technical scheme realizes:

a pile foundation low strain detection automatic hammering device comprises a control box provided with a vertical channel, an exciting hammer arranged in the vertical channel in a sliding mode, a telescopic supporting rod arranged below the control box and a driving lever horizontally arranged in the control box; the vibration exciting hammer comprises a hammer rod positioned in the vertical channel and a hammer head arranged at the lower end of the hammer rod, wherein the hammer rod is provided with a ratchet, a ratchet barb is downward, and an electric ratchet wheel meshed with the ratchet on the hammer rod is arranged in the control box; the diameter of the vertical channel is larger than that of the hammer rod, and a shifting fork is arranged on the shifting lever close to the hammer rod.

Further: a handle is arranged on the side surface of the control box. The stable control box is convenient to hold by hand.

Further: the handle is provided with a button for controlling the electric ratchet wheel. The button is arranged on the handle, so that manual control is facilitated.

Further: the driving lever is parallel to the handle and is arranged below the handle, a driving lever handle is arranged below the handle, one end of the driving lever handle is rotatably connected to the handle, and the middle section of the driving lever handle is rotatably connected with the driving lever through a rotating shaft.

And further: the shifting forks are arranged on one side of the hammer rod close to the electric ratchet wheel and one side of the hammer rod far away from the electric ratchet wheel, and the distance between the shifting forks on two sides of the hammer rod is the same as the diameter of the vertical channel.

Further: the shifting forks far away from one side of the electric ratchet wheel are connected with the control box through springs, and when the springs are in a balanced state, the shifting forks on two sides of the hammer rod are symmetrically arranged on two sides of the vertical channel.

And further: a battery electrically connected with the electric ratchet wheel is arranged in the control box.

Further: the electric ratchet comprises a ratchet wheel and a motor driving the ratchet wheel through a transmission belt.

Further: the lower end of the hammer head is in a semi-sphere shape.

Further: the rubber layer is coated outside the hammer head. The buffering is enhanced, the pile foundation is prevented from being damaged, and impact noise is reduced.

Compared with the prior art, the utility model have following advantage:

1. the device sets the height of the device through the telescopic supporting rod, then the electric ratchet wheel lifts the height of the shock hammer, and finally the hammer rod is pushed away from the electric ratchet wheel through the shifting fork by the shifting rod, so that the shock hammer freely falls to hit the pile foundation, the shock hammer can hit the same point on the pile foundation under the same height for many times, and waveforms with consistent and comparable conditions can be obtained, thereby eliminating human errors and improving the detection accuracy.

2. The waveform conditions collected by the device are consistent and reliable, the device does not need to return to the field for retesting again, the working efficiency is improved, and the project progress is ensured.

3. This device uses electronic ratchet lifting exciting hammer, replaces artifical the striking, reduces intensity of labour.

Drawings

Fig. 1 is an external view of the present invention;

FIG. 2 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 1;

FIG. 3 is a schematic sectional view taken along line B-B in FIG. 2;

fig. 4 is a schematic diagram of the application of the present invention on a pile foundation;

in the figure:

1. a control box; 1.1, a vertical channel; 2. a vibration-exciting hammer; 2.1, a hammer head; 2.2, a hammer rod; 2.3, ratchets; 3. a handle; 3.1, a button; 4. a deflector rod; 4.1, a shifting fork; 5. a lever handle; 6. a support bar; 7. an electric ratchet wheel; 7.1, ratchet wheel; 7.2, a motor; 8. a battery; 9. a spring; 10. and (5) pile foundations.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model discloses a following technical scheme realizes:

a pile foundation low strain detection automatic hammering device comprises a control box 1 with a vertical channel 1.1, an exciting hammer 2 installed in the vertical channel 1.1 in a sliding mode, a telescopic supporting rod 6 installed below the control box 1 and a deflector rod 4 horizontally installed in the control box 1; the vibration exciting hammer 2 comprises a hammer rod 2.2 positioned in the vertical channel 1.1 and a hammer head 2.1 arranged at the lower end of the hammer rod 2.2, the hammer rod 2.2 is provided with a ratchet 2.3, the barb of the ratchet 2.3 is downward, and an electric ratchet wheel 7 meshed with a ratchet 23 on the hammer rod 2.2 is arranged in the control box 1; the diameter of the vertical channel 1.1 is larger than the diameter of the hammer rod 2.2, and a shifting fork 4.1 is arranged on the shifting lever 4 and close to the hammer rod 2.2. A handle 3 is arranged on the side surface of the control box 1, and a button 3.1 for controlling the electric ratchet 7 is arranged on the handle 3. Deflector rod 4 is on a parallel with handle 3 and sets up in handle 3 below, installs deflector rod handle 5 below handle 3, and deflector rod handle 5 one end is rotated and is connected on handle 3, and deflector rod handle 5 middle section is rotated through pivot and deflector rod 4 and is connected. The shifting forks 4.1 are arranged on one side of the hammer rod 2.2 close to the electric ratchet wheel 7 and one side of the hammer rod far away from the electric ratchet wheel 7, and the distance between the shifting forks 4.1 on two sides of the hammer rod 2.2 is the same as the diameter of the vertical channel 1.1. The shifting forks 4.1 far away from one side of the electric ratchet wheel 7 are connected with the control box 1 through springs 9, and when the springs 9 are in a balanced state, the shifting forks 4.1 on two sides of the hammer rod 2.2 are symmetrically arranged on two sides of the vertical channel 1.1. A battery 8 electrically connected with the electric ratchet 7 is arranged in the control box 1, and the electric ratchet 7 comprises a ratchet 7.1 and a motor 7.2 for driving the ratchet 7.1 through a transmission belt. The lower end of the hammer head 2.1 is in a semi-sphere shape, and a rubber layer is wrapped outside the hammer head 2.1.

The utility model discloses a work use-way is:

first, the height of the control box 1 is set: the length of the support rod 6 is adjusted according to the preset height, the support rod 6 is vertically supported on the pile foundation 10, the vertical channel 1.1 is aligned to the excitation point on the pile foundation 10, and the handle 3 is held by hand to stably control the posture of the box 1. Then, a deflector rod handle 5 is pulled towards the tail end of the handle 3, the deflector rod handle 5 pulls the deflector rod 4 to drive a shifting fork 4.1 to push the hammer rod 2.2 to be close to the electric ratchet wheel 7, and the ratchet 2.3 on the hammer rod 2.2 is meshed with the electric ratchet wheel 7. At this time, the button 3.1 on the handle 3 is pressed, the electric ratchet 7 rotates to drive the vibration hammer 2 to ascend, and when the hammer head 2.1 ascends to the lower surface of the control box 1, the electric ratchet 7 is controlled to stop rotating. Finally, the driving lever handle 5 is pulled forwards, the driving lever handle 5 pushes the driving lever 4, the shifting fork 4.1 close to one side of the electric ratchet wheel 7 pushes the hammer rod 2.2 to be separated from the electric ratchet wheel 7, the driving lever handle 5 is released rapidly, the shifting fork 4.1 is placed back under the action of the spring 9, the exciting hammer 2 freely falls along the direction of the vertical channel 1.1, and the hammer head 2.1 strikes on the pile foundation 10 to complete striking operation. After the hammer 2.1 finishes the first impact on the pile foundation 10, the driving lever handle 5 is rapidly pulled towards the tail end of the handle 3, so that the hammer rod 2.2 is meshed with the electric ratchet wheel 7, and the test result is prevented from being influenced by multiple times of hammering after the hammer 2.1 is bounced.

When the pile foundation 10 is knocked again, the button 3.1 is only needed to be pressed again to lift the exciting hammer 2, and the subsequent operation steps are the same as the operation steps of the first knocking, so that the cycle is repeated, and the description is omitted.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a low automatic hammering device that detects that meets an emergency of pile foundation which characterized in that: comprises a control box (1) provided with a vertical channel (1.1), an exciting hammer (2) arranged in the vertical channel (1.1) in a sliding way, a telescopic support rod (6) arranged below the control box (1) and a deflector rod (4) horizontally arranged in the control box (1); the vibration exciting hammer (2) comprises a hammer rod (2.2) positioned in the vertical channel (1.1) and a hammer head (2.1) arranged at the lower end of the hammer rod (2.2), wherein the hammer rod (2.2) is provided with a ratchet (2.3), the barb of the ratchet (2.3) is downward, and an electric ratchet wheel (7) meshed with the ratchet (2.3) on the hammer rod (2.2) is arranged in the control box (1); the diameter of the vertical channel (1.1) is larger than that of the hammer rod (2.2), and a shifting fork (4.1) is arranged on the shifting rod (4) close to the hammer rod (2.2).

2. The pile foundation low strain detection automatic hammering device according to claim 1, characterized in that: a handle (3) is arranged on the side surface of the control box (1).

3. The pile foundation low-strain detection automatic hammering device according to claim 2, is characterized in that: the handle (3) is provided with a button (3.1) for controlling the electric ratchet wheel (7).

4. The pile foundation low strain detection automatic hammering device according to claim 2, characterized in that: deflector rod (4) are parallel to handle (3) and set up in handle (3) below, and deflector rod handle (5) are installed to handle (3) below, and deflector rod handle (5) one end is rotated and is connected on handle (3), and deflector rod handle (5) middle section is rotated through pivot and deflector rod (4) and is connected.

5. The pile foundation low-strain detection automatic hammering device according to claim 4, is characterized in that: the shifting forks (4.1) are arranged on one side of the hammer rod (2.2) close to the electric ratchet wheel (7) and one side of the hammer rod far away from the electric ratchet wheel (7), and the distance between the shifting forks (4.1) on two sides of the hammer rod (2.2) is the same as the diameter of the vertical channel (1.1).

6. The pile foundation low-strain detection automatic hammering device according to claim 5, is characterized in that: the shifting forks (4.1) far away from one side of the electric ratchet wheel (7) are connected with the control box (1) through springs (9), and when the springs (9) are in a balance state, the shifting forks (4.1) on two sides of the hammer rod (2.2) are symmetrically arranged on two sides of the vertical channel (1.1).

7. The pile foundation low strain detection automatic hammering device according to claim 1, characterized in that: a battery (8) electrically connected with the electric ratchet (7) is arranged in the control box (1).

8. The pile foundation low strain detection automatic hammering device according to claim 1, characterized in that: the electric ratchet wheel (7) comprises a ratchet wheel (7.1) and a motor (7.2) for driving the ratchet wheel (7.1) through a transmission belt.

9. The pile foundation low strain detection automatic hammering device according to claim 1, characterized in that: the lower end of the hammer head (2.1) is in a semi-sphere shape.

10. The pile foundation low strain detection automatic hammering device according to claim 1, characterized in that: the hammer head (2.1) is coated with a rubber layer.