A device and method for detecting the penetration of a steel pipe pile driven into the ground by hammering

Abstract

The present application relates to the technical field of steel pipe pile sinking penetration detection, and discloses a steel pipe pile hammer sinking penetration detection device, which comprises a detection mechanism composed of a support frame, a screw rod, a moving plate, a driver, a first laser instrument, a lead screw, a lifting plate, a second laser instrument and a transmission device; the support frame is provided with a middle slot for screw rod rotation and a driver for screw rod rotation; the middle slot is slidably provided with a moving plate threadedly connected with the screw rod; the moving plate is provided with the first laser instrument; the support frame is provided with a side slot for lead screw rotation and a transmission device for lead screw rotation on one side of the middle slot; the side slot is slidably provided with a lifting plate threadedly connected with the lead screw and located below the moving plate; and the lifting plate is provided with the second laser instrument. The detection device can enable the staff to intuitively observe the penetration value and reduce the error of manual evaluation of the steel pipe pile hammer sinking penetration. The present application also provides a steel pipe pile hammer sinking penetration detection method.

Description

Technical Field

[0001] This invention belongs to the field of steel pipe pile penetration testing technology, and provides a device and method for testing the penetration of steel pipe piles driven by hammer. Background Technology

[0002] Steel pipe piles consist of steel pipes, tongue and groove joints, and tongue and groove pins. The tongue and groove joints are vertically connected to the left end of the steel pipe wall. The cross-section of the tongue and groove joint is a square frame with one side open. Reinforcing ribs are provided on the side of the tongue and groove joints. The tongue and groove pins are vertically connected to the right end of the steel pipe wall at a position off-radius. The groove cross-section of the tongue and groove pins is I-shaped. When driving steel pipe piles, the steel pipe piles are driven vertically by a hammer to drive them into the ground. There are two methods for driving piles: hammer driving method and static pressure driving method.

[0003] Currently, the hammer-driven pile driving method requires extremely high ground flatness for the hammering equipment. If there is even a slight tilt during the pile driving process, it will pose a quality risk to the pile construction and a risk of the hammering equipment itself tipping over. In contrast, the static pressure pile driving method can determine whether to stop the pile driving by clearly showing the pressure gauge. The hammer-driven pile driving method judges the penetration depth by hammering. Generally, after 10 hammer blows, the depth of the steel pipe pile is observed and then compared with the penetration depth specified in the prestressed pipe pile atlas to see if the actual penetration depth is within the specified penetration depth range.

[0004] However, in current construction sites, the determination of penetration depth is mostly based on the experience of construction workers to judge whether pile driving can continue. Workers make assessments by visual inspection. However, manual assessment is prone to errors due to subjective reasons and lacks actual monitoring data to support it. If the judgment is wrong, it will have incalculable consequences for the construction. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a simple and convenient device and method for detecting the penetration of steel pipe piles driven by hammer, so as to solve the problem of large errors in the manual evaluation of the penetration of steel pipe piles.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A detection mechanism comprising a support frame, a screw, a movable plate, a driver, a first laser, a lead screw, a lifting plate, a second laser, and a transmission device. The support frame is provided with a central slot for screw rotation and a driver for screw rotation. A movable plate threadedly connected to the screw slides on the central slot, and the first laser is mounted on the movable plate. A side slot for lead screw rotation and a transmission device for lead screw rotation are provided on the support frame and located on one side of the central slot. A lifting plate threadedly connected to the lead screw and located below the movable plate slides on the side slot, and the second laser is mounted on the lifting plate.

[0007] Using the above scheme, this testing device drives the screw to rotate via a starter, which engages with the threaded ring inside the moving plate, providing power for the moving plate to slide on the central slot. This causes the first laser instrument to move and adjust until the laser beam emitted by the first laser instrument coincides with the upper surface of the steel pipe pile. Then, hammering is started to drive the steel pipe pile. After ten more hammer blows, the transmission is started to drive the lead screw to rotate, which engages with the threaded ring inside the lifting plate. This causes the lifting plate to rise and fall inside the side slot, thereby driving the second laser instrument to rise and fall, so that the laser beam emitted by the second laser instrument coincides with the upper surface of the steel pipe pile after ten hammer blows. At this time, the operator uses a laser rangefinder to detect the distance between the upper and lower laser beams. This distance value is the sinking height of the steel pipe pile after ten hammer blows, and thus the penetration depth of the steel pipe pile.

[0008] Optionally, a guide groove is provided on the support frame on the other side of the central slot, and a guide rod is provided on the guide groove for the sliding of the lifting plate. By setting a guide groove with a guide rod, the lifting action of the lifting plate is assisted, so as to make its lifting and lowering smooth and reliable.

[0009] Optionally, the drive and transmission can be a geared motor or a servo motor. A geared motor can provide higher torque and lower output speed, resulting in smooth up-and-down movement of the moving plate or lifting plate; while a servo motor can achieve high-precision motion control, allowing for more accurate positioning of the moving plate or lifting plate.

[0010] Optionally, the movable plate is equipped with an L-shaped measuring plate, the upper surface of which is flush with the laser beam emitted by the first laser instrument; the lifting plate is equipped with a laser rangefinder that cooperates with the L-shaped measuring plate and is used to measure the distance between the laser beams emitted by the first and second laser instruments. By setting up the L-shaped measuring plate and the laser rangefinder, the distance between the upper and lower laser beams can be measured, thereby obtaining the penetration depth of the steel pipe pile.

[0011] Optionally, it also includes: an auxiliary mechanism, consisting of a fixed plate, an expansion joint, a support plate, and ground nails. A fixed plate is symmetrically arranged on both sides of the lower part of the support frame, and each fixed plate has an expansion joint. Each expansion joint is connected to a support plate, and each support plate has several ground nails arranged in an array. By setting up the auxiliary mechanism, the testing device can be placed stably, facilitating its measurement work.

[0012] Optionally, the telescopic device can be a hydraulic cylinder, a pneumatic cylinder, an electric push rod, or a linear motor. This specific structure effectively enables the vertical lifting and lowering of the support plate.

[0013] Optionally, a display unit is installed inside the support frame. The display unit is electrically connected to the driver, the first laser instrument, the second laser instrument, the transmission device, the laser rangefinder, and the telescopic device. The display unit is equipped with a display screen. The display unit can control the above-mentioned components, record and compare the measurement data, and then display the obtained data so that the staff can intuitively obtain the test results.

[0014] Optionally, a level is installed on the support frame. The level can be used to adjust the levelness of the detection device, so that the laser instrument can detect accurately and reliably.

[0015] Optionally, the support frame is equipped with casters at the bottom. The casters facilitate easy movement of this testing device.

[0016] The present invention also proposes a detection method based on the above-mentioned steel pipe pile hammer driving pile penetration detection device, comprising the following steps:

[0017] 1) First, place the steel pipe pile vertically in preparation for hammering and driving the pile, and then move this testing device to a blank area on one side of the steel pipe pile; then activate the expansion joints on both sides of the support frame to push the support plates on both sides of the support frame down so that both support plates are in contact with the ground under the ground nails, and adjust them to a horizontal position by the level instrument.

[0018] 2) The drive unit rotates the screw to move the plate, raising and lowering the first laser instrument and adjusting the laser beam emitted by the first laser instrument to coincide with the upper surface of the steel pipe pile.

[0019] 3) Restart the hammering to drive the steel pipe pile, and after the predetermined number of hammer blows, start the transmission to rotate the screw to drive the lifting plate, so that the second laser instrument is raised and lowered and the laser beam emitted by the second laser instrument is aligned with the upper surface of the steel pipe pile after hammering.

[0020] 4) Measure the distance between the laser beam emitted by the first laser instrument and the laser beam emitted by the second laser instrument using a laser rangefinder to obtain the sinking height of the steel pipe pile after a predetermined number of hammer blows, and use this as a characterization of the actual penetration of the steel pipe pile driven by hammering.

[0021] 5) Next, compare the actual penetration with the specified penetration value on the prestressed pipe pile drawing set. If the actual penetration value is within the specified penetration value range, repeat steps 3)-5). If it is, end the hammering construction.

[0022] The technical advantages of this invention are as follows:

[0023] 1. This testing device provides more accurate detection of the penetration depth of steel pipe piles driven by hammer, allowing workers to visually observe the penetration depth values, reducing errors in manual assessment of the penetration depth of steel pipe piles driven by hammer, and avoiding the adverse results caused by forced hammering of steel pipe piles due to incorrect manual assessment of the penetration depth.

[0024] 2. This testing device has the advantages of simple structure, reasonable design, convenient and quick operation and movement, and simple construction, which helps to ensure construction quality and provides support for standardized construction on site.

[0025] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0027] Figure 1 This is a three-dimensional schematic diagram of the penetration detection device for steel pipe pile hammer driving of the present invention.

[0028] Figure 2 for Figure 1 A three-dimensional diagram from another direction;

[0029] Figure 3 for Figure 1 The diagram on the left;

[0030] Figure 4 for Figure 1 The diagram on the right;

[0031] Figure 5 for Figure 1 Front view;

[0032] Figure 6 for Figure 1 A diagram of the back of the building;

[0033] Figure 7 A front view of the detection device with a laser rangefinder and an L-shaped measuring plate installed.

[0034] Reference numerals: Detection mechanism 1, auxiliary mechanism 2; support frame 101, center slot 102, screw 103, moving plate 104, driver 105, first laser instrument 106, side slot 107, lead screw 108, lifting plate 109, second laser instrument 110, transmission device 111, guide slot 112, guide rod 113, laser rangefinder 114, L-shaped measuring plate 115; fixed plate 201, telescopic device 202, support plate 203, ground nail 204, level 205, display body 206, roller 207; the straight line on the laser instrument represents the laser beam it emits. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0036] like Figure 1-7As shown, the penetration testing device for steel pipe pile hammer driving mentioned in this embodiment includes: a testing mechanism 1, which consists of a support frame 101, a screw 103, a moving plate 104, a driver 105, a first laser instrument 106, a lead screw 108, a lifting plate 109, a second laser instrument 110, and a transmission device 111. The support frame 101 is provided with a center groove 102 for rotating the screw 103 and a driver 105 for rotating the screw 103. A movable plate 104, threadedly connected to the screw 103, is slidably mounted on the 02, and a first laser device 106 is mounted on the movable plate 104; a side slot 107 for rotating the lead screw 108 and a transmission device 111 for rotating the lead screw 108 are provided on the support frame 101 and located on one side of the central slot 102; a lifting plate 109, threadedly connected to the lead screw 108 and located below the movable plate 104, is slidably mounted on the side slot 107, and a second laser device 110 is mounted on the lifting plate 109. The movable plate 104 is provided with an L-shaped measuring plate 115, and the upper surface of the L-shaped measuring plate 115 is flush with the laser beam emitted by the first laser instrument 106; the lifting plate 109 is provided with a laser rangefinder 114 that cooperates with the L-shaped measuring plate 115 and is used to measure the distance between the laser beam emitted by the first laser instrument 106 and the laser beam emitted by the second laser instrument 110, and the laser outlet of the laser rangefinder 115 is flush with the laser beam emitted by the second laser instrument 110. Thus, by activating the driver 105, the screw 103 rotates, engaging with the threaded ring inside the moving plate 104, providing power for the movement of the moving plate 104. This causes the moving plate 104 to slide on the center groove 102, thereby moving the first laser instrument 106 until its laser beam coincides with the upper surface of the steel pipe pile (not shown). Then, the hammering is activated to drive the steel pipe pile. After ten more hammer blows, the transmission device 111 is activated to drive the lead screw 108 to rotate, and... The engagement of the screw rings inside the lifting plate 109 will cause the lifting plate 109 to move up and down inside the side slot 107, thereby causing the second laser instrument 110 to move up and down, so that the laser beam emitted by the second laser instrument 110 coincides with the upper surface of the steel pipe pile after ten hammer blows. At this time, the workers use the L-shaped measuring plate 115 and the laser rangefinder 114 to detect the distance between the upper and lower laser beams. This distance value is the sinking height of the steel pipe pile after ten hammer blows, and then the penetration degree of the steel pipe pile.

[0037] In this embodiment, a guide groove 112 is provided on the support frame 101 and on the other side of the center groove 102, and a guide rod 113 for sliding the lifting plate 109 is provided on the guide groove 112. Thus, by providing a guide groove with a guide rod, the lifting action of the lifting plate is assisted, making its lifting smooth and reliable. The driver 105 and the transmission 111 can be a geared motor or a servo motor. That is, by using a geared motor, higher torque and lower output speed can be provided, so that the up and down movement of the moving plate or lifting plate is smooth; while by using a servo motor, high-precision motion control can be achieved, so that the up and down position of the moving plate or lifting plate is more accurate.

[0038] In this embodiment, the testing device further includes an auxiliary mechanism 2, consisting of a fixed plate 201, a telescopic device 202, a support plate 203, and ground nails 204. A fixed plate 201 is symmetrically arranged on both sides of the lower part of the support frame 101. Each fixed plate 201 is equipped with a telescopic device 202, and each telescopic device 202 is connected to a support plate 203. Each support plate 203 is provided with several ground nails 204 arranged in an array. A level 205 is installed on the support frame 101. The telescopic device 202 is a hydraulic cylinder, pneumatic cylinder, electric push rod, or linear motor. By providing this auxiliary mechanism, the testing device can be placed stably, facilitating its measurement work. Simultaneously, the level 205 allows for adjustment of the levelness of the testing device, ensuring accurate and reliable laser detection. Rollers 207 are provided at the bottom of the support frame 101. The rollers facilitate convenient movement of the testing device. After the steel pipe pile is placed in a vertical, ready-to-sink position, the testing device is pushed to rotate the rollers below it, moving the device to a vacant spot on one side of the steel pipe pile. Then, the expansion joints 202 on both sides of the support frame 101 are activated, pushing the support plates 203 on both sides of the support frame 101 downwards until both support plates 203 are in contact with the ground, supporting the testing device. The level 205 is then observed to ensure it is level. If it is not level, the expansion joint 202 on the lower side is activated to readjust the position of the support plate 203 until the level 205 is level, thus ensuring the testing device is level and preventing tilting, which reduces the error in the test results. Finally, the two support plates 203 are fixed with ground nails 204 to secure the testing device, preventing movement during testing and ensuring accuracy.

[0039] In this embodiment, a display unit 206 is installed within the support frame 101. The display unit 206 is electrically connected to the driver 105, the first laser instrument 106, the second laser instrument 110, the actuator 111, the laser rangefinder 114, and the telescopic device 202. A display screen is mounted on the display unit 206. Specifically, a control module is installed within the display unit 206 to operate the driver 105, the actuator 111, and the telescopic device 202; to activate and deactivate the laser beams emitted by the first laser instrument 106 and the second laser instrument 110; and to enable the laser rangefinder 114 to measure the distance between the upper and lower laser beams and transmit this data to the internal system of the display unit 206 for display on the screen. Thus, the display unit allows control of the aforementioned components, recording and comparing the measurement data, and displaying the obtained data so that personnel can intuitively obtain the test results.

[0040] The present invention is also based on the detection method of the steel pipe pile driving penetration detection device according to the above-mentioned steel pipe pile driving penetration detection device, including the following steps: 1) First, the steel pipe pile is placed vertically in preparation for driving, and the detection device is moved to a blank area on one side of the steel pipe pile; then the telescopic devices 202 on both sides of the support frame 101 are activated to push the support plates 203 on both sides of the support frame 101 down, so that both support plates 203 are in contact with the ground under the ground nail 204, and are adjusted to a horizontal position by the level instrument 205; 2) The drive 105 rotates the screw 103 to drive the moving plate 104, so that the first laser instrument 106 is raised and lowered and the laser beam emitted by the first laser instrument 106 is aligned with the upper surface of the steel pipe pile; 3) The hammering is then started to drive the steel pipe pile. 4) After the predetermined number of hammer blows, the transmission device 111 is activated to rotate the screw 108 to drive the lifting plate 109, so that the second laser instrument 110 is raised and lowered and the laser beam emitted by the second laser instrument 110 is aligned with the upper surface of the steel pipe pile after hammering; 5) The distance between the laser beam emitted by the first laser instrument 106 and the laser beam emitted by the second laser instrument 110 is measured using the laser rangefinder 114 to obtain the sinking height of the steel pipe pile after the predetermined number of hammer blows, and this is used to characterize the actual penetration of the steel pipe pile after hammering; 6) The actual penetration is compared with the specified penetration on the prestressed pipe pile atlas to see if it is within the specified penetration range. If not, repeat steps 3)-5). If yes, the hammering construction ends after the penetration meets the requirements. This testing device provides more accurate detection of the penetration depth of steel pipe piles driven by hammering. It allows workers to visually observe the penetration depth values, reducing errors in manual assessment of the penetration depth of steel pipe piles and minimizing adverse construction results caused by forced hammering of steel pipe piles due to incorrect manual assessment of penetration depth.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for detecting the penetration depth of hammer-driven steel pipe piles, characterized in that, include: The testing mechanism (1) consists of a support frame (101), a screw (103), a moving plate (104), a driver (105), a first laser (106), a lead screw (108), a lifting plate (109), a second laser (110), and a transmission device (111). The support frame (101) is provided with a center groove (102) for rotating the screw (103) and a driver (105) for rotating the screw (103). A moving plate (104) threadedly connected to the screw (103) slides on the center groove (102), and a first laser (106) is provided on the moving plate (104). A driver (105) for rotating the screw (106) is provided on the support frame (101) and located on one side of the center groove (102). The rotating side slot (107) and the transmission device (111) for rotating the lead screw (108) are provided. A lifting plate (109) is slidably provided on the side slot (107) and threadedly connected to the lead screw (108) and located below the moving plate (104). A second laser instrument (110) is provided on the lifting plate (109). An L-shaped measuring plate (115) is provided on the moving plate (104), and the upper surface of the L-shaped measuring plate is flush with the laser beam emitted by the first laser instrument (106). A laser rangefinder (114) is provided on the lifting plate (109) to cooperate with the L-shaped measuring plate (115) and to measure the distance between the laser beam emitted by the first laser instrument (106) and the laser beam emitted by the second laser instrument (110).

2. The penetration testing device for steel pipe pile hammer driving according to claim 1, characterized in that, The support frame (101) is provided with a guide groove (112) on the other side of the center groove (102), and a guide rod (113) for sliding the lifting plate (109) is provided on the guide groove (112).

3. The penetration testing device for steel pipe pile hammer driving according to claim 1, characterized in that, The driver (105) and the transmission (111) are geared motors or servo motors.

4. The penetration testing device for hammer-driven steel pipe piles according to claim 1, characterized in that, Also includes: The auxiliary mechanism (2) consists of a fixed plate (201), an expansion joint (202), a support plate (203), and ground nails (204). A fixed plate (201) is symmetrically arranged on both sides of the lower part of the support frame (101). An expansion joint (202) is provided on each of the two fixed plates (201). Each expansion joint (202) is connected to a support plate (203), and each support plate (203) is provided with several ground nails (204) arranged in an array.

5. The penetration testing device for hammer-driven steel pipe piles according to claim 4, characterized in that, The telescopic device (202) is equipped with a hydraulic cylinder, a pneumatic cylinder, an electric push rod, or a linear motor.

6. The penetration testing device for steel pipe pile hammer driving according to claim 4, characterized in that, The support frame (101) is equipped with a display body (206), which is electrically connected to the driver (105), the first laser (106), the second laser (110), the transmission device (111), the laser rangefinder (114), and the telescopic device (202). The display body is equipped with a display screen.

7. The penetration testing device for hammer-driven steel pipe piles according to claim 1, characterized in that, A level (205) is installed on the support frame (101).

8. The penetration testing device for hammer-driven steel pipe piles according to claim 1, characterized in that, The support frame (101) is provided with rollers (207) at its bottom.

9. A detection method based on the penetration testing device for hammer-driven steel pipe piles according to any one of claims 1 to 8, characterized in that, Includes the following steps: 1) First, place the steel pipe pile vertically in preparation for hammering and driving the pile, and then move this testing device to a blank area on one side of the steel pipe pile; then activate the expansion joints on both sides of the support frame to push the support plates on both sides of the support frame down so that both support plates are in contact with the ground under the ground nails, and adjust them to a horizontal position by the level instrument. 2) The drive unit rotates the screw to move the plate, raising and lowering the first laser instrument and adjusting the laser beam emitted by the first laser instrument to coincide with the upper surface of the steel pipe pile. 3) Restart the hammering to drive the steel pipe pile, and after the predetermined number of hammer blows, start the transmission to rotate the screw to drive the lifting plate, so that the second laser instrument is raised and lowered and the laser beam emitted by the second laser instrument is aligned with the upper surface of the steel pipe pile after hammering. 4) Measure the distance between the laser beam emitted by the first laser instrument and the laser beam emitted by the second laser instrument using a laser rangefinder to obtain the sinking height of the steel pipe pile after a predetermined number of hammer blows, and use this as a characterization of the actual penetration of the steel pipe pile driven by hammering. 5) Next, compare the actual penetration with the specified penetration value on the prestressed pipe pile drawing set. If the actual penetration value is within the specified penetration value range, repeat steps 3) to 5). If it is, end the hammering construction.

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