Digital geotechnical engineering investigation in-situ testing device and data acquisition method

Abstract

The invention discloses a digital geotechnical engineering investigation in-situ testing device and a data acquisition method, and relates to the technical field of in-situ testing, the digital geotechnical engineering investigation in-situ testing device comprises an upper fixing seat, a lower fixing seat, a laser distance measuring sensor, a free drop hammer oil cylinder, a lifting frame, an upper guide seat, a lower guide seat, a counting sensor and a light reflecting plate, according to the design, the laser distance measuring sensor is used for measuring and obtaining initial position data of the striking device, the counting sensor is used for automatically obtaining the number of hammering times, and after each time of hammering, the striking device is driven by the driving system. A data value measured by the laser distance measuring sensor is compared with a calibrated initial position value, the total hammering depth value under the current number of times can be fed back in real time, the hammering number of times and the hammering depth value are compared with standard requirements, and when the operation standard requirements are met, hammering operation is automatically stopped, manual intervention is not needed, and the working efficiency is improved. The data loss is avoided while the data accuracy is ensured.

Description

Technical Field

[0001] This invention relates to the field of in-situ testing technology, specifically to a digital geotechnical engineering exploration in-situ testing device and data acquisition method. Background Technology

[0002] During engineering geological drilling, according to standard requirements, dynamic penetration tests are needed to assess geological conditions at different depths. The geological conditions are analyzed based on the number of hammer blows. However, existing testing equipment requires significant manual assistance throughout the entire process, from initial setup to test completion and data acquisition, and has several drawbacks, as follows:

[0003] Firstly, in the traditional drilling rig operation process, independent testing devices are mainly installed through a winch device. During the testing process, data needs to be recorded manually, which leads to drawbacks such as cumbersome process, poor safety, and low efficiency in equipment installation. Moreover, in the data recording process, because it involves counting manually and using paper records, the data is inaccurate and easily lost.

[0004] Secondly, although the hydraulic drilling rigs currently on the market have been improved from traditional drilling rigs by installing the testing device on the drilling rig boom and installing a counter to record the number of hammer blows during the test operation, they do not link the test operation with the drilling depth value, nor do they automatically realize the real-time online feedback and storage of data such as hammer depth and number of hammer blows during the hammering process, resulting in poor accuracy in the test data recording process.

[0005] Therefore, the present invention provides a digital in-situ testing device and data acquisition method for geotechnical engineering investigation. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a digital in-situ testing device and data acquisition method for geotechnical engineering exploration, solving the problems mentioned in the background.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a digital in-situ testing device, comprising an upper fixed seat and a lower fixed seat installed on a drilling tower, wherein a laser rangefinder is installed on the bottom surface of the upper fixed seat, and a free-fall hammer cylinder is installed between the upper fixed seat and the lower fixed seat, wherein the piston rod of the free-fall hammer cylinder is fixed at both ends to the upper fixed seat and the lower fixed seat respectively;

[0008] The free-fall hammer cylinder is equipped with a lifting frame. An upper guide seat and a lower guide seat are respectively installed at the upper and lower ends of one side of the lifting frame. The upper guide seat is slidably sleeved on the piston rod, and the lower guide seat is installed on the cylinder barrel of the free-fall hammer cylinder.

[0009] A counting sensor for recording the number of hammer blows is installed on the upper side of one side of the lifting frame;

[0010] The upper guide seat is equipped with a reflector corresponding to the laser rangefinder sensor, and the lifting frame is equipped with a striking device and a drive system for driving the striking device.

[0011] As a further technical solution of the present invention, the reflector is an arc-shaped plate, and the transmitting end and receiving end of the laser ranging sensor correspond to the reflector.

[0012] As a further technical solution of the present invention, the striking device includes a guide rod installed on the lifting frame and a test hammer slidably disposed outside the guide rod. A drill rod joint is installed at the bottom of the guide rod, and both ends of the guide rod are fixed to the lifting frame. The counting sensor is located at the top of the upper end of the lifting frame corresponding to the top position of the guide rod.

[0013] As a further technical solution of the present invention, the drive system includes a drive motor installed on the upper end of the lifting frame. Both the output end of the drive motor and the lower end of the lifting frame are provided with chain gears. A chain is connected to both chain gears. Two sets of hooks are provided on the chain near the two chain gears.

[0014] As a further technical solution of the present invention, the free-fall hammer cylinder is a double-rod hydraulic cylinder.

[0015] As a further technical solution of the present invention, both the laser ranging sensor and the counting sensor are connected to the touch screen of the digital drilling rig via transmission lines.

[0016] As a further technical solution of the present invention, a pin is installed on the lower fixed seat, and a pin hole seat is installed on the bottom side of the lifting frame, and the pin hole seat is provided with a pin hole for easy insertion and fixing of the pin.

[0017] A data acquisition method for a digital in-situ testing device comprises the following steps:

[0018] Step 1: Automatically acquire the current borehole depth data from the digital drilling rig, and manually input the current test operation depth value through the touch screen of the digital drilling rig. The purpose is to uniquely bind the depth data with the test operation data for easy recording and storage.

[0019] Step 2: Use the free-falling hammer cylinder to drive the lifting frame to move up and down, while releasing the pin from the lifting frame. Then, after adjusting the in-situ testing device to the working position, start the laser rangefinder sensor to measure. With the help of the reflector, the measured and recorded position can be calibrated as the initial position.

[0020] Step 3: Start the drive system to drive the impact device. During the hammering process, the counting sensor will be triggered to record the number of hammer blows and feed the results back to the touch screen of the digital drilling rig.

[0021] Step 4: After each hammer blow, the data value measured by the laser rangefinder is compared with the calibrated initial position value, which can provide real-time feedback on the total hammer depth value for the current number of blows;

[0022] Step 5: Compare the number of hammer blows and the hammer depth with the standard requirements. When the operation standard requirements are met, a signal will be transmitted to the drive system, which will control the hammering device to automatically stop the hammering operation.

[0023] Step Six: Throughout the process, different hole depths are uniquely bound to standard penetration test (SPT) data, and the number of hammer blows and changes in depth are automatically recorded. After automatic data collection, the data is stored in the memory card on the drilling rig and finally uploaded to the drilling platform system via the Internet of Things (IoT).

[0024] Beneficial effects

[0025] This invention provides a digital in-situ testing device and data acquisition method for geotechnical engineering investigation. Compared with existing technologies, it has the following advantages:

[0026] A digital in-situ testing device and data acquisition method for geotechnical engineering exploration is disclosed. Through the cooperation of a free-fall hammer cylinder and a lifting frame, the striking device can be raised to a designated position. A laser rangefinder sensor is used to measure and acquire the initial position data of the striking device. During the striking process, a counting sensor automatically acquires the number of hammer blows. After each blow, the data value measured by the laser rangefinder sensor is compared with the calibrated initial position value, providing real-time feedback on the total depth of penetration for the current number of blows. The number of blows and the depth of penetration are compared with standard requirements. When the operational standard requirements are met, the hammering operation automatically stops. This design ensures the accuracy of the data throughout the entire process without manual intervention, thus ensuring data accuracy and preventing data loss. Attached Figure Description

[0027] Figure 1 A first-person view of a digital geotechnical engineering in-situ testing device.

[0028] Figure 2 A second-view image of a digital geotechnical engineering in-situ testing device.

[0029] Figure 3 This is a view from another side of a digital in-situ testing device for geotechnical engineering investigation.

[0030] Figure 4This is a front view of a digital in-situ testing device for geotechnical engineering investigation.

[0031] In the diagram: 1. Upper fixed seat; 2. Lower fixed seat; 3. Laser rangefinder sensor; 4. Piston rod; 5. Cylinder; 6. Upper guide seat; 7. Lower guide seat; 8. Reflector; 9. Lifting frame; 91. Guide rod; 92. Test hammer; 93. Drill rod connector; 94. Drive motor; 95. Chain and gear; 96. Chain; 97. Hook; 10. Counting sensor; 11. Pin. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-4 A digital in-situ testing device includes an upper fixed seat 1 and a lower fixed seat 2 installed on a drilling tower. A free-fall hammer cylinder is installed between the upper fixed seat 1 and the lower fixed seat 2. The free-fall hammer cylinder is a double-rod hydraulic cylinder. The piston rod 4 of the free-fall hammer cylinder is fixed at both ends to the upper fixed seat 1 and the lower fixed seat 2 respectively. The free-fall hammer cylinder is fixed by the upper fixed seat 1 and the lower fixed seat 2, so that the free-fall hammer cylinder can drive the striking device to rise and fall to a suitable height position.

[0034] A laser rangefinder 3 is mounted on the bottom surface of the upper fixed base 1. A reflector 8 corresponding to the laser rangefinder 3 is mounted on the outside of the upper guide base 6. The reflector 8 is an arc-shaped plate. The transmitting end and receiving end of the laser rangefinder 3 correspond to the reflector 8. During the test operation, after the striking device is adjusted to the working position, the laser rangefinder 3 works in cooperation with the reflector 8 to easily record the initial position of the target, that is, the initial position after the striking device is adjusted.

[0035] A lifting frame 9 is installed on the free-fall hammer cylinder. An upper guide seat 6 and a lower guide seat 7 are respectively installed on the upper and lower ends of one side of the lifting frame 9. The upper guide seat 6 is slidably sleeved on the piston rod 4, and the lower guide seat 7 is installed on the cylinder 5 of the free-fall hammer cylinder. The free-fall hammer cylinder adopts a structure in which the cylinder 5 can move on the piston rod 4. That is, the upper guide seat 6 moves up and down on the piston rod 4, and the lower guide seat 7 is fixed on the cylinder 5 and moves up and down with the cylinder 5, thereby driving the lifting frame 9 to move up and down.

[0036] A counting sensor 10 for recording the number of hammer blows is installed on the upper side of one side of the lifting frame 9. Both the laser range sensor 3 and the counting sensor 10 are connected to the touch screen of the digital drilling rig via transmission lines. The data measured by the laser range sensor 3 and the counting sensor 10 can be fed back to the touch screen of the digital drilling rig. The touch screen has a built-in processor and memory card, which makes it easy to compare the data value measured by the laser range sensor 3 with the calibrated initial position value, and can provide real-time feedback on the total hammer depth value under the current number of blows.

[0037] The lifting frame 9 is equipped with a striking device and a drive system for driving the striking device. The striking device includes a guide rod 91 mounted on the lifting frame 9 and a test hammer 92 slidably disposed outside the guide rod 91. A drill pipe joint 93 is mounted at the bottom of the guide rod 91. Both ends of the guide rod 91 are fixed to the lifting frame 9. The counting sensor 10 is located at the top of the lifting frame 9, corresponding to the top position of the guide rod 91. Through the operation of the drive system, the chain 96 is rotated. The hook 97 on the chain 96 is used to drive the test hammer 92 to rise. After rising to a certain position, the hook 97 will disengage from the test hammer 92, and the test hammer 92 will fall vertically, thereby realizing the hammering operation of the test hammer 92.

[0038] The drive system includes a drive motor 94 mounted on the upper end of the lifting frame 9. Both the output end of the drive motor 94 and the lower end of the lifting frame 9 are equipped with chain gears 95. A chain 96 is connected to both chain gears 95. Two sets of hooks 97 are provided on the chain 96 near the two chain gears 95. A pin 11 is installed on the lower fixed base 2. A pin hole seat is installed on the bottom side of the lifting frame 9, and the pin hole seat has a pin hole for easy insertion and fixing of the pin 11. When not in use, the position of the lifting frame 9 and the striking device can be fixed by the pin 11 to prevent them from rotating.

[0039] A data acquisition method for a digital in-situ testing device comprises the following steps:

[0040] Step 1: Automatically acquire the current borehole depth data from the digital drilling rig, and manually input the current test operation depth value through the touch screen of the digital drilling rig. The purpose is to uniquely bind the depth data with the test operation data for easy recording and storage.

[0041] Step 2: Use the free-fall hammer cylinder to drive the lifting frame 9 to move up and down, and at the same time release the pin 11 from the restriction of the lifting frame 9. Then, after adjusting the in-situ testing device to the working position, start the laser range sensor 3 to measure. With the help of the reflector 8, the position at this time can be measured, recorded and calibrated as the initial position.

[0042] Step 3: Start the drive system to drive the impact device to work. During the hammering process of test hammer 92, the counting sensor 10 will be triggered. The counting sensor 10 will record the number of hammer blows and feed the feedback to the touch screen of the digital drilling rig.

[0043] Step 4: After each hammer blow, the data value measured by the laser rangefinder 3 is compared with the calibrated initial position value, which can provide real-time feedback on the total hammer depth value for the current number of blows;

[0044] Step 5: Compare the number of hammer blows and the hammer depth with the standard requirements. When the operation standard requirements are met, a signal will be transmitted to the drive system, which will control the hammering device to automatically stop the hammering operation.

[0045] Step Six: Throughout the process, different hole depths are uniquely bound to standard penetration test (SPT) data, and the number of hammer blows and changes in depth are automatically recorded. After automatic data collection, the data is stored in the memory card on the drilling rig and finally uploaded to the drilling platform system via the Internet of Things (IoT).

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A digital geotechnical investigation in-situ testing device comprising an upper fixed seat (1) and a lower fixed seat (2) mounted on a drilling tower, characterized in that, The bottom surface of the upper fixing seat (1) is provided with a laser ranging sensor (3), a free-fall hammer oil cylinder is arranged between the upper fixing seat (1) and the lower fixing seat (2), and the piston rod (4) of the free-fall hammer oil cylinder is fixed to the upper fixing seat (1) and the lower fixing seat (2) respectively; A lifting frame (9) is arranged on the free-fall hammer oil cylinder, the upper end and the lower end of the side surface of the lifting frame (9) are respectively provided with an upper guide seat (6) and a lower guide seat (7), the upper guide seat (6) is sleeved on the piston rod (4) in a sliding mode, and the lower guide seat (7) is arranged on the cylinder barrel (5) of the free-fall hammer oil cylinder; A counting sensor (10) for recording the number of hammering is arranged on the upper end of the side surface of the lifting frame (9); A reflecting plate (8) corresponding to the laser ranging sensor (3) is arranged on the outer portion of the upper guide seat (6), and a striking device and a driving system for driving the striking device are arranged on the lifting frame (9).

2. The digitalized geotechnical investigation in-situ testing device according to claim 1, characterized in that, The reflecting plate (8) is an arc-shaped plate, and the emitting end and the receiving end of the laser ranging sensor (3) correspond to the reflecting plate (8).

3. The digitalized geotechnical investigation in-situ testing device according to claim 1, wherein, The striking device comprises a guide rod (91) arranged on the lifting frame (9) and a test hammer (92) arranged on the outer portion of the guide rod (91) in a sliding mode, a drill rod joint (93) is arranged at the bottom of the guide rod (91), the two ends of the guide rod (91) are fixed to the lifting frame (9), and the counting sensor (10) is arranged at the top position of the guide rod (91) corresponding to the top of the lifting frame (9).

4. The digitalized geotechnical investigation in-situ testing device according to claim 1, wherein, The driving system comprises a driving motor (94) arranged on the upper end of the lifting frame (9), chain gears (95) are arranged at the output end of the driving motor (94) and the lower end of the lifting frame (9), two chain gears (95) are jointly connected with a chain (96), and two groups of hooks (97) are arranged on the chain (96) corresponding to the two chain gears (95).

5. The digitalized geotechnical investigation in-situ testing device according to claim 1, wherein, The free-fall hammer oil cylinder is a double-rod hydraulic cylinder.

6. The digital geotechnical investigation in-situ testing device of claim 1, wherein, The laser ranging sensor (3) and the counting sensor (10) are connected with the touch screen of the digital drilling rig through transmission lines.

7. The digital geotechnical investigation in-situ testing device of claim 1, wherein, A bolt (11) is arranged on the lower fixing seat (2), a pin hole seat is arranged on the bottom side of the lifting frame (9), and a pin hole is formed in the pin hole seat for facilitating insertion of the bolt (11).

8. The digital geotechnical investigation in-situ testing device according to any one of claims 1-7, wherein, The data acquisition method of the in-situ testing device comprises the following steps: Step one: automatically obtaining current drilling depth data from the digital drilling rig, manually inputting a current testing depth value through the touch screen of the digital drilling rig, and uniquely binding the depth data and the testing data for the purpose of facilitating recording and storage; Step two: driving the lifting frame (9) to move up and down by using the free-fall hammer oil cylinder, simultaneously releasing the restriction of the bolt (11) on the lifting frame (9), then adjusting the in-situ testing device to the working position, starting the laser ranging sensor (3) to measure, and cooperating with the reflecting plate (8) to measure and record the initial position at this time; Step three: start the driving system to drive the striking device to work, in the process of test hammer (92) hammering, the counting sensor (10) will be triggered, the counting sensor (10) is used to record the number of hammering and feedback to the touch screen of digital drilling machine; Step four: after each hammering, the data value measured by the laser ranging sensor (3) is compared with the calibrated initial position value, which can feedback the total hammering depth value at the current number in real time; Step five: then compare the number of hammering and the hammering depth value with the standard requirement, when it reaches the operation standard requirement, it will transmit signal to the driving system to control the striking device to stop hammering operation automatically; Step six: in the whole process, different hole depths and standard penetration data are uniquely bound, the number of hammering and the depth value change process are automatically recorded, after the data is automatically collected, it is stored in the storage card on the drilling machine, and finally uploaded to the drilling platform system through the Internet of things.

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