Detection device for a sounding test or a dynamic sounding test

Abstract

The utility model discloses a standard penetration test or detection device of dynamic sounding test, including setting in the tubular frame of test pole outside, and the three above -mentioned depth measuring roller of uniform distribution around test pole, the circumference of all depth measuring roller all presses against the lateral surface of test pole, drives all depth measuring roller synchronous rotation when test pole moves along the axial direction, every depth measuring roller all adopts independent roller revolution sensor collection rotation angle respectively, the tubular frame inserts the vibration monitor and internal computer system in, the rotation angle of every depth measuring roller that roller revolution sensor and vibration monitor will gather, and the vibration data of the tubular frame appearance sends internal computer system, internal computer system calculates the depth of test pole, the penetration and the number of hammering, and shows on the display screen outside the tubular frame. The utility model improves the data acquisition accuracy of standard penetration test or dynamic sounding test, eliminates human error, and reduces the labor intensity of data acquisition.

Description

Technical Field

[0001] This utility model relates to the field of standard penetration test (SPT) or dynamic penetration test technology, and in particular to a testing device for SPT or dynamic penetration tests. Background Technology

[0002] Commonly used standard penetrators and dynamic penetrators rely mainly on on-site testing personnel to observe and record the penetration depth and number of blows during testing. Due to the high speed of hammering during testing, there is an inevitable risk of misrecording or omission, and the testing personnel have a high workload.

[0003] Moreover, manually recording data on-site requires inputting it into survey and analysis software for analysis and statistics back indoors, which is tedious, time-consuming, and inefficient.

[0004] Therefore, how to improve the data acquisition accuracy of standard penetration tests or dynamic penetration tests, eliminate human error, and reduce the labor intensity of data acquisition has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of the above-mentioned deficiencies of the prior art, the present invention provides a detection device for standard penetration test or dynamic penetration test, the purpose of which is to improve the data acquisition accuracy of standard penetration test or dynamic penetration test, eliminate human error, and reduce the labor intensity of data acquisition.

[0006] To achieve the above objectives, this utility model discloses a testing device for standard penetration test or dynamic penetration test, including a tubular frame disposed outside the test rod, and three or more depth measuring rollers disposed inside the tubular frame and evenly distributed around the test rod.

[0007] Wherein, the rotation axes of all the depth measuring rollers are located in the same plane, and the plane containing all the rotation axes is perpendicular to the penetration direction of the test rod;

[0008] The circumferential surfaces of all the depth-sounding rollers abut against the side of the test rod, and the frictional force between each circumferential surface and the side of the test rod is sufficient to drive all the depth-sounding rollers to rotate synchronously when the test rod moves axially.

[0009] Each of the aforementioned depth-sounding rollers uses an independent roller rotation sensor to collect the rotation angle;

[0010] A vibration monitor and an internal computer system are embedded in the tubular frame;

[0011] The roller rotation sensor and the vibration monitor are connected to the internal computer system via a wired connection, and send the collected rotation angle of each of the depth sounding rollers and the vibration data of the tubular frame to the internal computer system.

[0012] The internal computer system calculates the depth, penetration and number of blows of the test rod based on the rotation angle of each of the depth-sensing rollers and the vibration data of the tubular frame, and displays the results on a display screen outside the tubular frame.

[0013] Preferably, the circumferential surface of all the depth measuring rollers is concave in cross-section, matching the cross-section of the test rod;

[0014] The central angle corresponding to each of the aforementioned concave arcs is no greater than 120 degrees.

[0015] More preferably, the internal computer system sends the calculated depth, penetration, and number of blows of the test rod to the cloud platform.

[0016] Preferably, the tubular frame is a circular annular cylinder with equal-diameter openings at the top and bottom, a hollow center, and smooth peripheral walls.

[0017] Preferably, each of the roller rotation sensors is a Hall effect sensor or a magnetoresistive sensor.

[0018] Preferably, each of the depth-sounding rollers is connected to the inner wall of the tubular frame via a bracket;

[0019] Each of the brackets is connected to the inner wall of the tubular frame by a connecting spring hinge, which presses the corresponding depth measuring roller toward the test rod.

[0020] More preferably, each of the brackets is welded to the housing of the corresponding roller rotation sensor, and all of them are hollow structures;

[0021] When each of the roller rotation sensors is connected to the internal computer system via a wired connection, the wiring between the sensor and the internal computer system passes through the internal space of the corresponding hollow structure of the bracket.

[0022] More preferably, the inner wall of the tubular frame is provided with a support corresponding to each of the spring hinge seats, and the three spring hinge seats are provided through the three supports.

[0023] The beneficial effects of this utility model are:

[0024] This invention uses a depth-measuring roller and a roller rotation sensor to measure the penetration depth of the test rod, which is more accurate than human observation and can be accurate to the millimeter level.

[0025] This invention uses a vibration monitor to record vibration data of a tubular frame, and obtains the number of hammer blows by comparing the data, which is more accurate than manual counting.

[0026] The circular arc concave design and uniformly distributed circumferential distribution of the depth measuring roller in this invention guides and fixes the test rod, ensuring that the drill rod remains vertical during the test and improving the accuracy of the test.

[0027] This utility model has a simple structure, is lightweight, and is easy to assemble. During testing, it can be easily monitored by inserting the test rod into the borehole of the drilling machine.

[0028] This invention transmits test data to the internal computer system in real time via wireless transmission, eliminating the tedious manual recording and input.

[0029] This invention enables the penetration depth and number of blows to be obtained through digital and automatic processing, thereby improving the efficiency of test analysis and processing.

[0030] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0031] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the present invention is shown.

[0032] Figure 2 A schematic diagram of the end face structure of an embodiment of the present invention is shown.

[0033] Figure 3 This diagram shows the connection structure of the depth measuring roller and the bracket in one embodiment of the present invention.

[0034] Figure 4 This diagram shows a partially enlarged structural schematic of the spring hinge portion in one embodiment of the present invention. Detailed Implementation

[0035] Example

[0036] like Figures 1 to 3 As shown, the testing device for standard penetration test or dynamic penetration test includes a tubular frame 1 set outside the test rod, and three or more depth measuring rollers 2 set inside the tubular frame 1 and evenly distributed around the test rod.

[0037] The rotation axes of all the depth measuring rollers 2 are located in the same plane, and the plane containing all the rotation axes is perpendicular to the penetration direction of the test rod;

[0038] All the circumferential surfaces of the depth measuring rollers 2 abut against the side of the test rod, and the friction between each circumferential surface and the side of the test rod is sufficient to drive all the depth measuring rollers 2 to rotate synchronously when the test rod moves axially.

[0039] Each depth-sounding roller 2 is equipped with an independent roller rotation sensor 3 to collect the rotation angle;

[0040] A vibration monitor and an internal computer system are embedded in the tubular frame 1;

[0041] The roller rotation sensor 3 and the vibration monitor are connected to the internal computer system via wired connection. The collected rotation angle of each depth measuring roller 2 and the vibration data of the tubular frame 1 are sent to the internal computer system.

[0042] The internal computer system calculates the depth, penetration and number of blows of the test rod based on the rotation angle of each depth measuring roller 2 and the vibration data of the tubular frame 1, and displays it on the display screen 7 outside the tubular frame 1.

[0043] This invention involves evenly distributing at least three depth-measuring rollers 2 around the test rod.

[0044] During the standard penetration test or dynamic cone penetration test, multiple sounding rollers 2 simultaneously clamp the test rod and rotate according to the amount of movement of the test rod as it descends. This not only allows for the measurement of the amount of descent of the test rod but also ensures that the test rod remains vertical during the test, thus improving the accuracy of the test.

[0045] The built-in computer system records the rotation angle of each depth measuring roller 2 and the vibration data of the tubular frame 1 emitted by the vibration monitor in real time. Without relying on the internal computer system, the internal computer system embedded in the tubular frame 1 automatically calculates the test position, penetration depth and number of hammer blows, and displays the relevant test data on the display screen.

[0046] In some embodiments, the circumferential surface of all the depth measuring rollers 2 is concave in cross-section, matching the cross-section of the test rod;

[0047] The central angle corresponding to each concave arc is no greater than 120 degrees.

[0048] In practical applications, the circumferential surface of the depth measuring roller 2 is concave in arc shape in cross-section, which matches the cross-section of the test rod, ensuring a closer fit between the depth measuring roller 2 and the test rod.

[0049] In some embodiments, the internal computer system sends the calculated depth, penetration, and number of blows of the test rod to the cloud platform.

[0050] In some embodiments, the tubular frame 1 is an annular cylinder with equal-diameter openings at the top and bottom, a hollow center, and smooth peripheral walls.

[0051] In practical applications, the tubular frame 1 is hollow inside, which makes it easier to build in sensors such as the depth measuring roller 2, the roller rotation sensor 3, and the vibration monitor.

[0052] In some embodiments, each roller rotation sensor 3 is a Hall effect sensor or a magnetoresistive sensor.

[0053] In practical applications, each depth measuring roller 2 is connected to the corresponding roller rotation sensor 3 as needed to ensure that the roller rotation sensor 3 can record the rotation angle of the corresponding depth measuring roller 2.

[0054] like Figure 3 and Figure 4 As shown, in some embodiments, each sounding roller 2 is connected to the inner wall of the tubular frame 1 via a bracket 4.

[0055] Each support 4 is connected to the inner wall of the tubular frame 1 by a connecting spring hinge 5, which presses the corresponding depth measuring roller 2 toward the test rod.

[0056] In practical applications, each support 4 is connected to the inner wall of the tubular frame 1 through a spring hinge 5. The spring hinge 5 ensures that the depth measuring roller 1 is pressed tightly towards the test rod along with the support 4. This design makes the depth measuring roller 1 fit tightly with the drill rod, and at the same time can adapt to the situation where the diameter of the test rod joint column increases, so that the depth measuring roller 1 can rotate better as the test rod descends, ensuring accurate measurement of the descent depth of the drill rod.

[0057] In some embodiments, each bracket 4 is welded to the housing of the corresponding roller rotation sensor 3, and all are hollow structures;

[0058] When each roller rotation sensor 3 is connected to the internal computer system via a wired connection, the wiring between the sensor and the internal computer system is routed through the internal space of the hollow structure of the corresponding bracket 4.

[0059] A vibration monitor is embedded in the main cylinder 1, which transmits the hammer impact vibration waves through a depth-sounding roller and automatically records the number of hammer blows. At the same time, a wireless transmission device is embedded in the main cylinder to transmit data to a cloud platform in real time. The cloud platform processes the test data in real time and provides test evaluation results, such as the compaction of the sand and the risk of liquefaction.

[0060] In some embodiments, the inner wall of the tubular frame 1 is provided with a support 6 corresponding to each spring hinge 5, and three spring hinges 5 are provided through three supports 6.

[0061] This invention also provides a test data preprocessing method. The internal computer system of the above-mentioned standard penetration test or dynamic penetration test device calculates the depth and penetration of the test rod, as well as the number of times the operator hammers the test rod, based on the rotation angle of each sounding roller 2 and the vibration data of the tubular frame 1. The specific algorithm is as follows:

[0062] The internal computer system divides the maximum value of the rotation angle of each depth measuring roller 2 by 360°, and then multiplies it by π and the diameter of the corresponding depth measuring roller 2 to obtain the depth of the test rod measured individually by the corresponding depth measuring roller 2.

[0063] The average value of the depths of the test rod measured individually by all depth measuring rollers 2 is then taken as the depth of the test rod.

[0064] The internal computer system compares the real-time recorded vibration data with the hammer impact vibration threshold, counts the number of vibrations in the real-time recorded vibration data that meet the hammer impact vibration threshold, and outputs the count of vibrations as the number of times the operator hammers the test rod.

[0065] The hammer impact vibration threshold is the range of vibration data that occurs in the tubular frame 1 when the test rod is hammered.

[0066] In practical applications, this invention uses the method of the depth measuring roller 2 rotating with the test rod to convert the vertical linear displacement of the test rod into the rotation angle of the depth measuring roller 2. Then, a Hall effect or magnetoresistive sensor is used as the roller rotation sensor 3 to collect the rotation angle of the depth measuring roller 2, and the vertical linear displacement of the test rod is calculated by the internal computer system.

[0067] The vibration monitor embedded in the tubular frame 1 automatically records the vibration data of the tubular frame 1 in real time, and then the internal computer system counts the number of vibrations that meet the hammering vibration threshold in the real-time recorded vibration data to obtain the hammering number.

[0068] In some embodiments, the internal computer system processes the depth of the test rod measured individually for each depth-sensing roller 2 as follows:

[0069] Automatically record the depth H0 of the test rod being lowered into place before the start of the test;

[0070] Subtract the height difference ΔH between the depth measuring roller 2 and the orifice to obtain the initial depth H1 of the test. Then, record the penetration depth H after each hammer blow to the test rod by the operator in real time. i ;

[0071] The height difference ΔH between each depth measuring roller 2 and the orifice is measured manually and input into the internal computer system as external data.

[0072] Finally, the penetration depth H after the last hammer blow end The difference between the initial depth H1 and the initial depth H1, after subtracting 0.15, is taken as the output depth ΔS of the test rod measured by the single depth measuring roller 2 of the corresponding depth measuring roller 2, i.e., ΔS = H end -H1-0.15;

[0073] The treatment of penetration depth and number of blows includes standard penetration test mode and dynamic penetration test mode;

[0074] The standard penetration test mode is as follows:

[0075] The number of blows was recorded when the soil was penetrated to a depth of 15cm at the start of the experiment, and this number was output as the pre-blow count N0. Then, the number of blows N was recorded every 10cm of penetration. j ;

[0076] The cumulative number of hammer blows to penetrate 30cm is taken as the standard penetration test hammer blow count N, where N = N1 + N2 + N3, and the test is terminated.

[0077] When the number of hammer blows reaches 50, but the penetration depth is less than 30cm, record the actual penetration depth ΔS. 50 The result is then converted into the standard penetration test blow count N for a penetration depth of 30cm, where N = 30 * 50 / ΔS. 50 And terminate the experiment;

[0078] The dynamic penetration test mode is as follows:

[0079] Record the number of blows N corresponding to every 10cm penetration from the start of the experiment. j The test was terminated when the number of hammer blows was greater than 50 for three consecutive times or when the hammer bounced.

[0080] If the penetration depth of all three penetrations is less than 10cm, then the number of hammer blows should be converted to the number of blows required for a penetration depth of 10cm.

[0081] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A testing device for standard penetration testing or dynamic penetration testing; characterized in that, It includes a tubular frame (1) set outside the test rod, and three or more depth measuring rollers (2) set inside the tubular frame (1) and evenly distributed around the test rod; The rotation axes of all the depth measuring rollers (2) are located in the same plane, and the plane containing all the rotation axes is perpendicular to the penetration direction of the test rod; The circumferential surfaces of all the depth measuring rollers (2) abut against the side of the test rod, and the friction between each circumferential surface and the side of the test rod is sufficient to drive all the depth measuring rollers (2) to rotate synchronously when the test rod moves axially. Each of the depth-sounding rollers (2) is equipped with an independent roller rotation sensor (3) to collect the rotation angle; A vibration monitor and an internal computer system are embedded in the tubular frame (1); The roller rotation sensor (3) and the vibration monitor are connected to the internal computer system via a wired connection. The collected rotation angle of each of the depth measuring rollers (2) and the vibration data of the tubular frame (1) are sent to the internal computer system. The internal computer system calculates the depth, penetration and number of blows of the test rod based on the rotation angle of each of the depth measuring rollers (2) and the vibration data of the tubular frame (1), and displays it on the display screen (7) outside the tubular frame (1).

2. The testing apparatus for standard penetration testing or dynamic penetration testing as described in claim 1, characterized in that, The circumferential surface of all the depth measuring rollers (2) is concave in arc shape in cross-section, matching the cross-section of the test rod; The central angle corresponding to each of the aforementioned concave arcs is no greater than 120 degrees.

3. The testing device for standard penetration test or dynamic penetration test as described in claim 2, characterized in that, The internal computer system sends the calculated depth, penetration, and number of blows of the test rod to the cloud platform.

4. The testing apparatus for standard penetration test or dynamic penetration test as described in claim 1, characterized in that, The tubular frame (1) is a circular cylinder with equal-diameter openings at the top and bottom, a hollow center, and smooth peripheral walls.

5. The testing apparatus for standard penetration test or dynamic penetration test as described in claim 1, characterized in that, Each of the roller rotation sensors (3) is a Hall effect sensor or a magnetoresistive sensor.

6. The testing apparatus for standard penetration test or dynamic penetration test as described in claim 1, characterized in that, Each of the depth-sounding rollers (2) is connected to the inner wall of the tubular frame (1) via a bracket (4); Each of the brackets (4) and the inner wall of the tubular frame (1) are connected by a spring hinge (5) to press the corresponding depth measuring roller (2) toward the test rod.

7. The testing apparatus for standard penetration test or dynamic penetration test as described in claim 6, characterized in that, Each of the brackets (4) is welded to the housing of the corresponding roller rotation sensor (3), and all of them are hollow structures; When each of the roller rotation sensors (3) is connected to the internal computer system via a wired connection, the lines between the sensor and the internal computer system are all routed through the internal space of the hollow structure of the corresponding bracket (4).

8. The testing apparatus for standard penetration test or dynamic penetration test as described in claim 6, characterized in that, The inner wall of the tubular frame (1) is provided with a support (6) corresponding to each of the spring hinge seats (5), and the three spring hinge seats (5) are set by the three supports (6).

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