Method for measuring driving depth of drain board based on low-voltage pulse

Abstract

The invention discloses a method for measuring the driving depth of a drainage plate based on low-voltage pulses, and the method comprises the steps: S1, taking a section of plastic drainage plate with a known actual driving depth, and testing the depth of the plastic drainage plate through a low-voltage pulse instrument; s2, the measured depth is compared with the actual hitting depth, the whole wave speed on the low-voltage pulse instrument is adjusted, and then the low-voltage pulse instrument is calibrated; and S3, measuring the hitting depth of the unknown plastic drainage plate by using the calibrated low-voltage pulse instrument. According to the invention, the depth measurement precision and efficiency of the plastic drainage plate are greatly improved.

Description

Technical Field

[0001] The invention relates to a method for measuring the installation depth of a drainage board based on low-pressure pulses. Background Art

[0002] During the soft foundation treatment process, plastic drain boards are usually installed and combined with preloading or vacuum preloading to achieve drainage and consolidation. The installation depth of the plastic drain boards directly affects the treatment effect of the soft soil foundation. Currently, there are three main methods for testing the depth of plastic drain boards:

[0003] 1. Resistance depth measurement. In the published patent application number 200410065396.4, it is proposed to use the method of measuring the resistance value of the drain board to estimate the installation depth of the drain board, and it is necessary to connect the copper wires at the bottom of the drain board to form a loop. After our field tests, we found that this method has many constraints. For example, the abundance and salinity of groundwater will have a significant impact on the measurement data, and it cannot meet the corresponding accuracy requirements.

[0004] 2. Scale on the board head. This method calculates the installation depth by subtracting the inkjet-coded scale marks on the front and rear drain boards. Due to complex construction site conditions, the inkjet-coded markings on the drain boards after immersion in water are unclear, making it difficult to accurately calculate the installation depth. Furthermore, manufacturers may make scale errors during production, affecting record keeping.

[0005] 3. Intelligent monitoring: Install a driving depth tester on the pile frame of the plug-in machine, loosen the pressure wheel at the same time, put the drainage board between the pressure wheel and the transmission wheel, and when the drainage board moves, it drives the transmission wheel to rotate, thereby recording the drainage depth.

[0006] The actual length of the water plate, but in actual application, it is found that it is easy to get stuck or the recording is inaccurate.

[0007] Therefore, in order to solve the above problems, a method for measuring the installation depth of drainage boards based on low-pressure pulses is provided. Summary of the Invention

[0008] The purpose of the present invention is to overcome the existing defects and provide a method for measuring the installation depth of drain boards based on low-pressure pulses, which greatly improves the depth measurement accuracy and efficiency of plastic drain boards.

[0009] The technical solution to achieve the above purpose is:

[0010] A method for measuring the depth of a drainage board based on low-pressure pulses, comprising:

[0011] Step S1, taking a section of plastic drainage board with a known actual installation depth, and testing its depth by a low-voltage pulse pulse meter;

[0012] Step S2, adjusting the whole wave speed on the low-pressure pulse pulsator based on the comparison between the measured depth and the actual driving depth, thereby calibrating the low-pressure pulse pulsator;

[0013] Step S3: Use a calibrated low-voltage pulse meter to measure the installation depth of the unknown plastic drainage board.

[0014] Preferably, in step S1, the plastic drainage board is made of materials used for conventional soft foundation treatment, both sides of the board core are wrapped with non-woven filter membranes, and the depth measuring wire is in the form of enameled copper wire, which is wrapped with a layer of insulating rubber on the outside.

[0015] Preferably, in step S1, the low-voltage pulse instrument consists of a display panel, a control panel, a low-voltage pulse wire and a copper wire fixing clamp, one end of the low-voltage pulse wire is plugged into the control panel, and the other end is connected to the copper wire fixing clamp.

[0016] Preferably, in step S1, the actual depth of the plastic drainage board is known by testing with a low-voltage pulse pulse meter, including:

[0017] Step S11, tearing off the non-woven filter membrane on the plastic drain board with a known actual depth to expose the depth measuring wire;

[0018] Step S12, removing the insulating rubber from the sounding wire;

[0019] Step S13, using a lighter to heat the enameled copper wire to remove the insulating paint on the enameled copper wire;

[0020] Step S14, fixing the copper wire fixing clip of the low-voltage pulse pulser on the enameled copper wire;

[0021] Step S15, the low-pressure pulse transmitter transmits a low-pressure pulse wave to the plastic drainage board with a known actual installation depth through the measurement button on the control panel;

[0022] In step S16, the transmitted wave will reflect back a waveform when it reaches the cut-off position of the drainage board. The low-voltage pulse transmitter calculates the round-trip time of the pulse wave and then displays a length on the display panel, that is, the depth of the plastic drainage board with known actual installation depth.

[0023] Preferably, in step S16, the depth L of the plastic drain board is calculated by measuring the time difference Δt between the transmitted pulse and the reflected pulse and the known wave velocity V of the pulse in the cable. The calculation formula is:

[0024] L=V·△t / 2.

[0025] Preferably, in step S2, if the measured length is longer or shorter than the actual driving depth, the wave speed is adjusted by adjusting the wave speed button on the control panel so that the displayed depth is equal to the actual driving depth, thereby completing the calibration of the low-voltage pulse pulser.

[0026] Preferably, in step S3, using a calibrated low-voltage pulse meter to measure the installation depth of the unknown plastic drain board includes:

[0027] Step S31, tearing off the non-woven filter membrane on the plastic drain board of unknown actual depth to expose the depth measuring wire;

[0028] Step S32, removing the insulating rubber from the sounding wire;

[0029] Step S33, using a lighter to heat the enameled copper wire to remove the insulating paint on the enameled copper wire;

[0030] Step S34, fixing the copper wire fixing clip of the low-voltage pulse pulser on the enameled copper wire;

[0031] Step S35, the low-pressure pulse transmitter transmits a low-pressure pulse wave to the unknown actual depth of the plastic drainage board through the measurement button on the control panel;

[0032] Step S36, when the transmitted wave reaches the cut-off position of the unknown actual depth plastic drainage board, it will reflect back a waveform, and the low-voltage pulse transmitter calculates the round-trip time of the pulse wave;

[0033] In step S37, a relatively smooth waveform is displayed on the display panel. A relatively convex waveform appears above the relatively smooth curve, which is the unknown actual installation depth of the plastic drainage board.

[0034] Preferably, in step S37, the size of the waveform is adjusted by using the zoom in or zoom out button on the control panel so that it can be fully presented on the display panel, and then the cursor is moved to the left starting point of the raised waveform by using the left and right keys on the control panel. At this time, the number that appears on the display panel is the installation depth of the unknown actual installation depth of the plastic drainage board.

[0035] The beneficial effect of the present invention is that: the present invention does not need to connect the copper wires at the bottom of the drainage board to form a loop. A low-voltage pulse wave is emitted to the plastic drainage board by a low-voltage pulse transmitter, so as to obtain the installation depth of the plastic drainage board, thereby greatly improving the depth measurement accuracy and efficiency of the plastic drainage board. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a flow chart of a method for measuring the depth of a drainage board based on low-pressure pulses according to the present invention;

[0037] Figure 2 It is a structural diagram of the plastic drain board and low-voltage pulse pulser in the present invention;

[0038] Figure 3 This is a flow chart of the present invention for testing the depth of the plastic drain board with a known actual depth by using a low-voltage pulse pulse meter;

[0039] Figure 4 This is a flow chart of the present invention for measuring the installation depth of unknown plastic drain boards using a calibrated low-voltage pulse pulse meter;

[0040] Figure 5 It is a waveform diagram displayed on the display panel of the low-voltage pulse pulse meter of the present invention.

[0041] In the figure: 1. Plastic drainage board; 11. Board core; 12. Filter membrane; 13. Enameled copper wire; 14. Insulating rubber; 21. Display panel; 22. Control panel; 23. Low-voltage pulse wire; 24. Copper wire fixing clip. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0043] The present invention will be further described below with reference to the accompanying drawings.

[0044] like Figure 1 As shown, a method for measuring the depth of a drainage board based on low-pressure pulses includes:

[0045] Step S1: Take a section of plastic drainage board with a known actual installation depth and test its depth using a low-voltage pulse pulse meter.

[0046] like Figure 2 As shown, the plastic drainage board 1 is made of materials used for conventional soft foundation treatment, the board core 11 is wrapped with non-woven filter membrane 12 on both sides, the depth measuring wire is in the form of enameled copper wire 13, and the outside is wrapped with a layer of insulating rubber 14.

[0047] like Figure 2As shown, the low-voltage pulse instrument consists of a display panel 21, a control panel 22, a low-voltage pulse wire 23 and a copper wire fixing clamp 24. One end of the low-voltage pulse wire 23 is plugged into the control panel 22, and the other end is connected to the copper wire fixing clamp 24.

[0048] like Figure 3 As shown, the actual depth of the plastic drainage board is known by testing with a low-pressure pulse pulse meter, including:

[0049] Step S11, tearing off the non-woven filter membrane 12 on the plastic drain board with a known actual depth to expose the depth measuring wire;

[0050] Step S12, removing the insulating rubber 14 on the sounding wire;

[0051] Step S13, using a lighter to heat the enameled copper wire 13 to remove the insulating paint on the enameled copper wire 13;

[0052] Step S14, fixing the copper wire fixing clip 24 of the low-voltage pulse pulse instrument on the enameled copper wire 13;

[0053] Step S15, the low-pressure pulse transmitter transmits a low-pressure pulse wave to the plastic drainage board with a known actual installation depth through the measurement button on the control panel 22;

[0054] In step S16, the transmitted wave will reflect back a waveform when it reaches the cut-off position of the drain board. The low-voltage pulse transmitter calculates the round-trip time of the pulse wave and then displays a length on the display panel 21, that is, the depth of the plastic drain board actually installed.

[0055] In the embodiment, the installation depth L of the plastic drain board is calculated by measuring the time difference Δt between the transmitted pulse and the reflected pulse and the known wave velocity V of the pulse in the cable. The calculation formula is:

[0056] L=V·△t / 2.

[0057] Step S2, according to the comparison between the measured depth and the actual driving depth, the whole wave speed on the low-pressure pulse pulsator is adjusted, and the low-pressure pulse pulsator is calibrated.

[0058] In the embodiment, if the measured length is longer or shorter than the actual driving depth, the wave velocity is adjusted by adjusting the wave velocity button on the control panel 22 so that the displayed depth and the actual driving depth are equal, thereby completing the calibration of the low-voltage pulser.

[0059] Step S3: Use a calibrated low-voltage pulse meter to measure the installation depth of the unknown plastic drainage board.

[0060] like Figure 4As shown, use a calibrated low-pressure pulse pulse meter to measure the unknown plastic drainage board installation depth, including:

[0061] Step S31, tearing off the non-woven filter membrane 12 on the plastic drain board of unknown actual depth to expose the depth measuring wire;

[0062] Step S32, removing the insulating rubber 14 on the sounding wire;

[0063] Step S33, using a lighter to heat the enameled copper wire 13 to remove the insulating paint on the enameled copper wire 13;

[0064] Step S34, fixing the copper wire fixing clip 24 of the low-voltage pulse pulse instrument on the enameled copper wire 13;

[0065] Step S35, the low-pressure pulse transmitter transmits a low-pressure pulse wave to the unknown actual depth of the plastic drainage board through the measurement button on the control panel 22;

[0066] Step S36, when the transmitted wave reaches the cut-off position of the unknown actual depth plastic drainage board, it will reflect back a waveform, and the low-voltage pulse transmitter calculates the round-trip time of the pulse wave;

[0067] In step S37, a relatively smooth waveform is displayed on the display panel 21. A relatively convex waveform appears above the relatively smooth curve, which is the unknown actual installation depth of the plastic drainage board.

[0068] In the embodiment, the size of the waveform is adjusted by the zoom in or zoom out button on the control panel 22 so that it can be fully displayed on the display panel 21. Then, the left and right keys on the control panel 22 are used to move the cursor to the left starting point of the raised waveform. At this time, the number that appears on the display panel 21 is the unknown actual installation depth of the plastic drainage board. Figure 5 shown.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for measuring the depth of drainage board installation based on low-pressure pulse, characterized in that: include: Step S1, taking a section of plastic drainage board with a known actual installation depth, and testing its depth by a low-voltage pulse pulse meter; Step S2, adjusting the whole wave speed on the low-pressure pulse pulsator based on the comparison between the measured depth and the actual driving depth, thereby calibrating the low-pressure pulse pulsator; Step S3: Use a calibrated low-voltage pulse meter to measure the installation depth of the unknown plastic drainage board.

2. The method for measuring the depth of drainage board based on low-pressure pulse according to claim 1 is characterized in that: In step S1, the plastic drainage board (1) is made of materials used for conventional soft foundation treatment, both sides of the board core (11) are wrapped with non-woven filter membranes (12), and the depth measuring wire is in the form of enameled copper wire (13) and is wrapped with a layer of insulating rubber (14) on the outside.

3. The method for measuring the depth of drainage board based on low-pressure pulse according to claim 2 is characterized in that: In step S1, the low-voltage pulse instrument is composed of a display panel (21), a control panel (22), a low-voltage pulse wire (23) and a copper wire fixing clamp (24), one end of the low-voltage pulse wire (23) is plugged into the control panel (22), and the other end is connected to the copper wire fixing clamp (24).

4. The method for measuring the depth of drainage board based on low-pressure pulse according to claim 3 is characterized in that: In the step S1, the actual depth of the plastic drainage board is known by testing with a low-voltage pulse pulse meter, including: Step S11, tearing off the non-woven filter membrane (12) on the plastic drainage board with a known actual depth to expose the depth measuring wire; Step S12, removing the insulating rubber (14) on the sounding wire; Step S13, using a lighter to bake the enameled copper wire (13) to remove the insulating paint on the enameled copper wire (13); Step S14, fixing the copper wire fixing clip (24) of the low-voltage pulse pulse instrument on the enameled copper wire (13); Step S15, the low-pressure pulse transmitter transmits a low-pressure pulse wave to the plastic drainage board of known actual installation depth through the measurement button on the control panel (22); In step S16, the transmitted wave will reflect back a waveform when it reaches the cut-off position of the drain board. The low-voltage pulse transmitter calculates the round-trip time of the pulse wave and then displays a length on the display panel (21), that is, the depth of the plastic drain board actually installed.

5. The method for measuring the depth of drainage board based on low-pressure pulse according to claim 4 is characterized in that: In step S16, the depth L of the plastic drain board is calculated by measuring the time difference Δt between the transmitted pulse and the reflected pulse and the known wave velocity V of the pulse in the cable. The calculation formula is: L=V·△t / 2.

6. The method for measuring the depth of drainage board based on low-pressure pulse according to claim 3 is characterized in that: In the step S2, if the measured length is longer or shorter than the actual driving depth, the wave speed is adjusted by adjusting the wave speed button on the control panel (22) so that the displayed depth is equal to the actual driving depth, thereby completing the calibration of the low-voltage pulse pulser.

7. The method for measuring the depth of drainage board based on low-pressure pulse according to claim 4 is characterized in that: In step S3, the calibrated low-voltage pulse meter is used to measure the installation depth of the unknown plastic drain board, including: Step S31, tearing off the non-woven filter membrane (12) on the plastic drain board of unknown actual depth to expose the depth measuring wire; Step S32, removing the insulating rubber (14) on the sounding wire; Step S33, using a lighter to bake the enameled copper wire (13) to remove the insulating paint on the enameled copper wire (13); Step S34, fixing the copper wire fixing clip (24) of the low-voltage pulse pulse instrument on the enameled copper wire (13); Step S35, the low-pressure pulse transmitter transmits a low-pressure pulse wave to the unknown actual depth of the plastic drainage board through the measurement button on the control panel (22); Step S36, when the transmitted wave reaches the cut-off position of the unknown actual depth plastic drainage board, it will reflect back a waveform, and the low-voltage pulse transmitter calculates the round-trip time of the pulse wave; Step S37, a relatively smooth waveform is displayed on the display panel (21), and a relatively convex waveform appears above the relatively smooth curve, that is, the installation depth of the unknown actual installation depth of the plastic drainage board.

8. The method for measuring the depth of drainage board based on low-pressure pulse according to claim 6 is characterized in that: In step S37, the size of the waveform is adjusted by pressing the zoom-in or zoom-out button on the control panel (22) so that it can be fully displayed on the display panel (21), and then the cursor is moved to the left starting point of the raised waveform by pressing the left and right keys on the control panel (22). At this time, the number that appears on the display panel (21) is the installation depth of the unknown actual installation depth of the plastic drain board.

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