Method, system and device for measuring deformation of miniature large-gradient foundation pile

Abstract

The invention relates to the technical field of deformation measurement, in particular to a deformation measurement method, system and device for a miniature large-gradient foundation pile, and the method comprises the steps: collecting a sound wave detection signal of a miniature pile foundation pile; the updated fluctuation amplitude of the pile sound wave detection signals of the micro pile foundation is obtained; calculating a signal distortion coefficient; acquiring sound wave detection distribution frequency; acquiring a sound wave detection signal attenuation value of the micro pile foundation pile sound wave detection signal; and a sound wave detection signal time domain deformation threshold value and a sound wave detection signal frequency domain deformation threshold value are obtained, and then deformation measurement is conducted on the miniature large-gradient foundation pile. According to the invention, the measurement of the deformation of the micro pile is more accurate.

Description

Technical Field

[0001] The present application relates to the technical field of deformation measurement, and in particular to a deformation measurement method, system and device for micro large-slope foundation piles. Background Art

[0002] The topography and geomorphology of mountainous areas are different from those of plain areas. The terrain is undulating and the surface is rugged, which causes great inconvenience to the current construction projects and transportation. In view of the complex and special terrain changes in mountainous areas, the existing basic construction equipment tends to be miniaturized.

[0003] Mountain micro piles are a type of construction structure with a diameter of 300-400mm and a slenderness ratio greater than 30, which is used in mountainous narrow terrain areas. Micro piles have the excellent properties of small pile diameter, small working surface, small hole digging torque and high bearing capacity. Therefore, micro piles are widely used in many construction technology fields such as foundation reinforcement, foundation pit support, and landslide prevention. The quality and safety monitoring of micro piles can be combined with the structural status of mountain micro piles to effectively detect the deformation degree of micro piles and avoid safety problems of mountain micro piles. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of this application is to provide a deformation measurement method, system and device for micro-large slope foundation piles. The technical solutions adopted are as follows:

[0005] In a first aspect, an embodiment of the present application provides a method for measuring deformation of a micro large-slope foundation pile, the method comprising the following steps:

[0006] Collecting micro pile foundation acoustic wave detection signals; obtaining updated fluctuation amplitudes of the micro pile foundation acoustic wave detection signals based on discrete amplitudes and differences of the micro pile foundation acoustic wave detection signals;

[0007] Based on the correlation between the amplitudes of the acoustic detection signals of the micro pile foundation, the signal distortion coefficient is obtained;

[0008] Based on the frequency domain distribution characteristics of the acoustic wave detection signal of the micro pile foundation in each interval, the acoustic wave detection distribution frequency is obtained;

[0009] Based on the acoustic wave detection distribution frequency and the energy of the acoustic wave detection signal of the micropile foundation, an acoustic wave detection signal attenuation value of the acoustic wave detection signal of the micropile foundation is obtained;

[0010] Based on the amplitude of the acoustic wave detection signal of the micro pile foundation, the signal distortion coefficient and the attenuation value of the acoustic wave detection signal, the time domain deformation threshold of the acoustic wave detection signal and the frequency domain deformation threshold of the acoustic wave detection signal are obtained;

[0011] According to the updated fluctuation amplitude, signal distortion coefficient and acoustic detection signal attenuation value, combined with the acoustic detection signal time domain deformation threshold and the acoustic detection signal frequency domain deformation threshold, the deformation measurement of the micro large slope foundation pile is carried out.

[0012] Furthermore, the method for obtaining the fluctuation amplitude is:

[0013] Based on the discrete amplitude of the micro-pile foundation acoustic wave detection signal, the acoustic wave amplitude fluctuation range of the micro-pile foundation acoustic wave detection signal is obtained;

[0014] Obtain the vibration index of the acoustic detection signal based on the extreme difference of the acoustic wave amplitude fluctuation;

[0015] The time taken for the micro pile foundation acoustic wave detection signal to be sent and received is recorded as the acoustic wave detection propagation time;

[0016] The ratio of the acoustic detection signal fluctuation amplitude to the acoustic detection propagation time is calculated as the updated fluctuation amplitude of the micropile foundation acoustic detection signal.

[0017] Furthermore, the method for obtaining the acoustic wave amplitude fluctuation range and the acoustic wave detection signal vibration index is:

[0018] Dividing the acoustic wave detection signal of the micropile foundation into windows of preset lengths;

[0019] For each window, the range of the fluctuation amplitude of the micropile foundation acoustic wave detection signal in the window is calculated, and the average of the ranges of the signal fluctuation amplitudes in all windows of the micropile foundation acoustic wave detection signal is recorded as the acoustic wave amplitude fluctuation range;

[0020] For each window, the difference between the maximum value of the micropile foundation acoustic wave detection signal fluctuation amplitude and the extreme difference of the acoustic wave amplitude fluctuation in the window is calculated as the first amplitude difference, and the sum of the first amplitude differences of all windows is calculated as the acoustic wave detection signal vibration index.

[0021] Further, the method for obtaining the signal distortion coefficient is:

[0022] Obtain the maximum amplitude point of the micro pile foundation acoustic wave detection signal;

[0023] The micropile foundation pile acoustic wave detection signal is divided into a left micropile foundation pile acoustic wave detection signal and a right micropile foundation pile acoustic wave detection signal with the maximum amplitude point as the center;

[0024] The distance between the acoustic wave detection signal of the left micropile foundation and the acoustic wave detection signal of the right micropile foundation is calculated as the signal distortion coefficient.

[0025] Furthermore, the method for obtaining the acoustic wave detection distribution frequency is:

[0026] The acoustic wave detection signal of the micro pile foundation is divided into two time series signals, namely, the front section signal of the acoustic wave detection and the back section signal of the acoustic wave detection, and the front section signal of the acoustic wave detection and the back section signal of the acoustic wave detection are respectively used as the input of the discrete Fourier algorithm, and the output results are respectively recorded as the front section frequency domain signal of the acoustic wave detection and the back section frequency domain signal of the acoustic wave detection;

[0027] The frequency domain signal of the front section of the acoustic wave detection and the frequency domain signal of the back section of the acoustic wave detection are equally divided into a preset number of intervals, and the ratio of the number of frequency values ​​in each interval to the total number of frequency values ​​in the acoustic wave detection signal of the micropile foundation is recorded as the acoustic wave detection interval distribution frequency of each interval;

[0028] The mean of the acoustic wave detection interval distribution frequencies of all intervals in the frequency domain signal before acoustic wave detection is taken as the acoustic wave detection distribution frequency of the frequency domain signal before acoustic wave detection, and the mean of the acoustic wave detection interval distribution frequencies of all intervals in the frequency domain signal after acoustic wave detection is taken as the acoustic wave detection distribution frequency of the frequency domain signal after acoustic wave detection.

[0029] Furthermore, the method for obtaining the attenuation value of the acoustic wave detection signal is:

[0030] The acoustic detection distribution frequencies of the frequency domain signals of the front section of acoustic detection and the frequency domain signals of the back section of acoustic detection are used as probabilities in the information entropy formula to calculate the information entropy of the signals of the front section of acoustic detection and the signals of the back section of acoustic detection;

[0031] Calculate the product of the information entropy and energy of the front-end signal of the acoustic wave detection as the frequency domain energy value of the front-end signal of the acoustic wave detection, and calculate the product of the information entropy and energy of the rear-end signal of the acoustic wave detection as the frequency domain energy value of the rear-end signal of the acoustic wave detection;

[0032] The absolute value of the difference between the frequency domain energy values ​​of the acoustic wave detection front-end signal and the acoustic wave detection back-end signal is recorded as the acoustic wave detection signal attenuation value.

[0033] Furthermore, the method for obtaining the acoustic wave detection signal time domain deformation threshold and the acoustic wave detection signal frequency domain deformation threshold is:

[0034] Acquiring the amplitude, signal distortion coefficient and acoustic wave detection signal attenuation value of the micropile foundation acoustic wave detection signal of a preset number of defect-free preset standard micropile foundation piles;

[0035] The average value of the amplitude of the acoustic wave detection signal of the micropile foundation piles of a preset number of defect-free preset standard micropile foundation piles is calculated as the first mean value, the average value of the signal distortion coefficient of the preset number of defect-free preset standard micropile foundation piles is calculated as the second mean value, the average value of the attenuation value of the acoustic wave detection signal of the preset number of defect-free preset standard micropile foundation piles is calculated as the frequency domain deformation threshold of the acoustic wave detection signal, and the product of the first mean value and the second mean value is used as the time domain deformation threshold of the acoustic wave detection signal.

[0036] Furthermore, the deformation measurement of the micro-high-slope foundation piles includes:

[0037] For each micropile foundation pile to be measured, calculating the product between the updated fluctuation amplitude of the micropile foundation pile acoustic wave detection signal and the signal distortion coefficient as the first product of each micropile foundation pile to be measured;

[0038] For each micro-pile foundation to be measured, if the first product of the micro-pile foundation is greater than the time domain deformation threshold of the acoustic detection signal, and the attenuation value of the acoustic detection signal is greater than the frequency domain deformation threshold of the acoustic detection signal, the micro-pile foundation has serious structural deformation defects;

[0039] If the first product of the micropile foundation pile is less than the time domain deformation threshold of the acoustic detection signal, and the attenuation value of the acoustic detection signal is less than the frequency domain deformation threshold of the acoustic detection signal, the micropile foundation pile structure is normal and has no defects;

[0040] Otherwise, the micro pile foundation will have internal structural deformation defects.

[0041] In the second aspect, an embodiment of the present application provides a deformation measurement system for a micro-large-slope foundation pile, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of any one of the above-mentioned methods for measuring the deformation of a micro-large-slope foundation pile when executing the computer program.

[0042] In a third aspect, an embodiment of the present application provides a deformation measurement device for a micro large-slope foundation pile, the system comprising:

[0043] A signal acquisition module, used to collect acoustic wave detection signals of micro pile foundations;

[0044] A threshold acquisition module is used to obtain the updated fluctuation amplitude of the micropile foundation acoustic wave detection signal based on the discrete amplitude and difference of the micropile foundation acoustic wave detection signal; obtain the signal distortion coefficient based on the correlation between the amplitudes of the micropile foundation acoustic wave detection signal; obtain the acoustic wave detection distribution frequency based on the frequency domain distribution characteristics of the micropile foundation acoustic wave detection signal in each interval; obtain the acoustic wave detection signal attenuation value of the micropile foundation acoustic wave detection signal based on the acoustic wave detection distribution frequency and the energy of the micropile foundation acoustic wave detection signal; obtain the acoustic wave detection signal time domain deformation threshold and the acoustic wave detection signal frequency domain deformation threshold based on the amplitude of the micropile foundation acoustic wave detection signal, the signal distortion coefficient and the acoustic wave detection signal attenuation value;

[0045] The deformation measurement module is used to measure the deformation of micro large-slope foundation piles based on the updated fluctuation amplitude, signal distortion coefficient and acoustic detection signal attenuation value, combined with the acoustic detection signal time domain deformation threshold and the acoustic detection signal frequency domain deformation threshold.

[0046] This application has at least the following beneficial effects:

[0047] This application first pre-processes the acquired ultrasonic detection data of mountain micro-piles, and reduces or even eliminates the influence of abnormal environmental noise on the calculation errors caused by subsequent further calculation and analysis as much as possible. This application uses the propagation properties of sound waves inside the micro-pile foundation piles to calculate the characteristics of the sound wave propagation speed and waveform shape change from the time domain perspective, analyzes the internal deformation structure characteristics of the micro-pile foundation piles to be measured, and improves the accuracy of the micro-pile foundation pile acoustic wave detection signal to characterize the characteristics of micro-pile foundation pile defects. At the same time, this application takes into account the energy attenuation phenomenon of sound waves when passing through the inside of the micro-pile foundation piles, and further improves the accuracy of the micro-pile foundation pile acoustic wave detection signal to reflect the internal deformation defect characteristics of the micro-pile foundation piles by analyzing the frequency energy characteristics of the sound wave signal in the frequency domain. Compared with the traditional micro-pile acoustic wave transmission method analysis, it more accurately reflects the characteristics of the deformation quality defects of mountain micro-piles, and the measurement of the deformation of micro-piles is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 A flowchart of a method for measuring deformation of a micro-large-slope foundation pile provided in one embodiment of the present application;

[0050] Figure 2A deformation measurement flow chart provided for one embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, describes in detail the deformation measurement method, system and device of a micro-large slope foundation pile proposed in the present application, its specific implementation method, structure, features and effects. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0052] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0053] The following is a detailed description of the specific scheme of the deformation measurement method, system and device for micro-large slope foundation piles provided by the present application in conjunction with the accompanying drawings.

[0054] See also Figure 1 , which shows a flow chart of the steps of a deformation measurement method of a micro-large-slope foundation pile provided by an embodiment of the present application, the method comprising the following steps:

[0055] Step S001, obtaining a micro pile foundation acoustic wave detection signal.

[0056] Normally, micro pile foundations are formed by pouring reinforced fine stone concrete. If the micro pile foundation has quality problems such as hollows and looseness, the micro pile foundation will be severely deformed. Therefore, the present application uses the acoustic wave transmission method to monitor the deformation quality of the micro pile foundation. After the acoustic detection tubes are grouped and numbered, the acoustic detection tubes are placed in the order of the group numbers. The acoustic detection tubes have probes, and the probes are synchronously raised from the bottom of the pile to keep the probe heights of all acoustic detection tubes at the same height. The signal collected by the acoustic wave sensor probe is recorded as the original micro pile foundation acoustic wave detection signal. Among them, the acoustic wave transmission method is a well-known technology and will not be described in detail here.

[0057] When acquiring the original micropile foundation acoustic wave detection signal, due to the presence of environmental noise interference signals during the acquisition process, the original micropile foundation acoustic wave detection signal of the micropile foundation acquired at this time may contain abnormal data signals.

[0058] This abnormal data signal will cause serious interference to the monitoring of abnormal conditions inside the micropile foundation, resulting in inaccurate abnormal phenomena in the normal analysis and judgment of the acoustic wave detection data signal inside the micropile foundation. Therefore, it is necessary to pre-process the original micropile foundation acoustic wave detection signal.

[0059] The original micro pile foundation acoustic wave detection signal is used as the input of the Gaussian filtering algorithm, the interference of abnormal white noise in the original micro pile foundation acoustic wave detection signal is reduced or even eliminated as much as possible, and the filtered micro pile foundation acoustic wave detection signal is output. Among them, the Gaussian filtering algorithm is a well-known technology and will not be described in detail here.

[0060] Step S002, based on the discrete amplitude and difference of the micropile foundation acoustic wave detection signal, obtain the updated fluctuation amplitude of the micropile foundation acoustic wave detection signal; based on the correlation between the amplitudes of the micropile foundation acoustic wave detection signal, obtain the signal distortion coefficient; based on the frequency domain distribution characteristics of the micropile foundation acoustic wave detection signal in each interval, obtain the acoustic wave detection distribution frequency; based on the acoustic wave detection distribution frequency and the energy of the micropile foundation acoustic wave detection signal, obtain the acoustic wave detection signal attenuation value of the micropile foundation acoustic wave detection signal.

[0061] In actual engineering practice, it is extremely difficult to place the acoustic detection tube absolutely parallel to the pile body. If the acoustic detection tube is tilted or bent, the acoustic detection signal of the micro pile foundation in the same detection section will deviate greatly from the actual situation, thus affecting the overall measurement accuracy of the deformation quality of the micro pile foundation.

[0062] Since the variation trend of the micro-pile foundation acoustic wave detection signal should have the characteristics of continuous gradual variation in a local range, for the micro-pile foundation acoustic wave detection signal, each window segment with a length of τ is taken. In this embodiment, the length τ is 15.

[0063] When sound waves propagate in micropile foundations and encounter concrete quality defects on the propagation path, the sound waves will produce local diffraction, reflection and refraction in the quality defect area, which will cause the received sound wave speed to decrease, waveform distortion and energy attenuation.

[0064] Therefore, the acoustic wave detection signal of micropile foundation is first analyzed and calculated from the time domain perspective.

[0065] For the micropile foundation acoustic wave detection signal in each window, the updated fluctuation amplitude of the micropile foundation acoustic wave detection signal is calculated:

[0066] For each window, the range of the fluctuation amplitude of the micropile foundation acoustic wave detection signal in the window is calculated, and the average of the ranges of the signal fluctuation amplitudes in all windows of the micropile foundation acoustic wave detection signal is recorded as the acoustic wave amplitude fluctuation range.

[0067] For each window, the difference between the maximum value of the micropile foundation acoustic wave detection signal fluctuation amplitude and the extreme difference of the acoustic wave amplitude fluctuation in the window is calculated as the first amplitude difference, and the sum of the first amplitude differences of all windows is calculated as the acoustic wave detection signal vibration index.

[0068] During the acoustic detection of micro pile foundations, if the micro pile foundations have abnormal structural defects such as honeycomb mud inclusions, the acoustic detection signal of the micro pile foundations will have amplitude attenuation during the propagation of the micro pile foundations. At this time, the amplitude difference between the acoustic amplitude signal in different local windows and the overall acoustic detection signal of the micro pile foundation will be relatively reduced, and the calculated vibration index of the acoustic detection signal of the micro pile foundation will also be relatively small, indicating that there are certain structural distribution anomalies inside the micro pile foundation.

[0069] The time taken for the micropile foundation acoustic wave detection signal to be sent and received is recorded as the acoustic wave detection propagation time. The updated fluctuation amplitude of the micropile foundation acoustic wave detection signal is obtained according to the acoustic wave detection propagation time and the acoustic wave detection signal fluctuation amplitude. The ratio of the acoustic wave detection signal fluctuation amplitude to the acoustic wave detection propagation time is calculated as the updated fluctuation amplitude of the micropile foundation acoustic wave detection signal.

[0070] There are mud defects inside the micro pile foundation, which hinders the transmission of the sound wave signal inside the micro pile foundation. At this time, the speed of sound will decrease during the propagation of the sound wave in the micro pile foundation, which increases the total length of time for the sound wave signal to be sent to the receiving process. At the same time, during the sound wave vibration of the micro pile foundation, due to the abnormal mud structure, the sound wave vibration amplitude will also be lost and decreased. At this time, the updated fluctuation amplitude of the micro pile foundation sound wave detection signal calculated will be relatively small. Therefore, if there are structural defects in the micro pile foundation to be detected, the smaller the updated fluctuation amplitude of the micro pile foundation sound wave detection signal calculated at this time, the more it means that there are defects in the internal structure of the micro pile foundation.

[0071] For the micropile foundation acoustic wave detection signal, if there is an abnormal mud layer in the internal structure of the micropile foundation, the micropile foundation acoustic wave detection signal will pass through the micropile foundations in different structural layers, resulting in a certain degree of distortion in the waveform of the micropile foundation acoustic wave detection signal. Therefore, the waveform change characteristics of the micropile foundation acoustic wave detection signal are calculated and analyzed.

[0072] If the internal structure of the micropile foundation is normal and there is no abnormal deformation of the micropile foundation body, the waveform of the micropile foundation acoustic wave detection signal should be semicircular.

[0073] Get the maximum amplitude point of the micropile foundation acoustic wave detection signal. Take the maximum amplitude point as the center and divide the micropile foundation acoustic wave detection signal into two different signal components on the left and right. The left signal component is recorded as the left micropile foundation acoustic wave detection signal, and the right signal component is recorded as the right micropile foundation acoustic wave detection signal.

[0074] The distance between the left micropile foundation acoustic wave detection signal and the right micropile foundation acoustic wave detection signal is calculated as the signal distortion coefficient. In this embodiment, DTW distance is selected as the distance measurement method. The implementer may select other measurement methods according to actual conditions.

[0075] If the distance between the two different signal components on the left and right is larger, it means that the difference between the two signals is more obvious. At this time, the calculated signal distortion coefficient will also be relatively large, indicating that the internal structure of the micropile foundation is likely to have abnormal deformation quality problems.

[0076] When the internal structure of the micropile foundation is abnormal, the time domain amplitude of the micropile foundation acoustic wave detection signal will be attenuated to a certain extent, and the time domain waveform will also be attenuated to a certain extent. The calculated micropile foundation acoustic wave detection signal fluctuation amplitude and signal distortion coefficient will also change accordingly.

[0077] During the propagation of the acoustic wave detection signal of the micropile foundation in the concrete micropile foundation, if there are poor quality parts such as mud voids inside the pile body, acoustic wave diffusion will occur. At this time, the energy of the acoustic wave itself will also be attenuated. Therefore, it is necessary to further calculate the frequency domain signal characteristics of the acoustic wave vibration signal.

[0078] The acoustic detection signal of the micropile foundation is equally divided into two time series signals, the front signal of the acoustic detection and the back signal of the acoustic detection, and the front signal of the acoustic detection and the back signal of the acoustic detection are respectively used as the input of the discrete Fourier algorithm, and the output results are respectively recorded as the front frequency domain signal of the acoustic detection and the back frequency domain signal of the acoustic detection.

[0079] The energy of the frequency domain signal before the acoustic wave detection and the frequency domain signal after the acoustic wave detection is further calculated by the following method:

[0080] The frequency domain signal of the front section of the acoustic wave detection and the frequency domain signal of the back section of the acoustic wave detection are equally divided into N intervals, and the value of N in this embodiment is 12. The ratio of the number of frequency values ​​in each interval to the total number of frequency values ​​in the acoustic wave detection signal of the micropile foundation is recorded as the acoustic wave detection interval distribution frequency of each interval.

[0081] The mean of the acoustic wave detection interval distribution frequencies of all intervals in the frequency domain signal before acoustic wave detection is taken as the acoustic wave detection distribution frequency of the frequency domain signal before acoustic wave detection, and the mean of the acoustic wave detection interval distribution frequencies of all intervals in the frequency domain signal after acoustic wave detection is taken as the acoustic wave detection distribution frequency of the frequency domain signal after acoustic wave detection.

[0082] Further, the information entropy and energy of the acoustic detection front-end signal and the acoustic detection rear-end signal are calculated respectively. The information entropy of the acoustic detection front-end signal and the acoustic detection rear-end signal is calculated based on the acoustic detection distribution frequency of the acoustic detection front-end frequency domain signal and the acoustic detection rear-end frequency domain signal. Among them, the calculation method of information entropy and energy is a well-known technology and will not be repeated here.

[0083] The product of the information entropy and energy of the front-end signal of the acoustic detection is calculated as the frequency domain energy value of the front-end signal of the acoustic detection, and the product of the information entropy and energy of the rear-end signal of the acoustic detection is calculated as the frequency domain energy value of the rear-end signal of the acoustic detection. The absolute value of the difference between the frequency domain energy values ​​of the front-end signal of the acoustic detection and the rear-end signal of the acoustic detection is recorded as the attenuation value of the acoustic detection signal.

[0084] During the acoustic detection of micro pile foundations, if the internal mass distribution of the micro pile foundation structure is relatively even, the energy attenuation of the acoustic detection signal of the micro pile foundation pile during the transmission of the internal structure of the micro pile foundation pile is relatively gentle. At this time, the calculated attenuation value of the acoustic detection signal will also be relatively small. When the internal structure of the micro pile foundation pile is abnormally filled with mud and causes deformation, the acoustic detection signal of the micro pile foundation pile will cause a sudden attenuation of the signal energy due to transmission in different media, so the calculated attenuation values ​​of the front and rear signals of the acoustic detection will be relatively large.

[0085] Step S003, measuring the deformation of the micropile in combination with the time-frequency signal characteristics of the acoustic wave detection.

[0086] The denser the internal structure of the micropile foundation, the faster the micropile foundation acoustic wave detection signal is transmitted inside the micropile foundation and the more gradual the energy decay is. In view of this, α defect-free standard micropile foundations are taken for testing. In this embodiment, the value of α is 1000.

[0087] The amplitude, signal distortion coefficient and attenuation value of the acoustic wave detection signal of the micropile foundation piles of α defect-free standard micropile foundation piles are obtained, wherein the method for obtaining the signal distortion coefficient and the attenuation value of the acoustic wave detection signal is as shown in step S002, the average value of the amplitude of the acoustic wave detection signal of the micropile foundation piles of the α defect-free standard micropile foundation piles is calculated as the first mean value, the average value of the signal distortion coefficient of the α defect-free standard micropile foundation piles is calculated as the second mean value, the average value of the attenuation value of the acoustic wave detection signal of the α defect-free standard micropile foundation piles is calculated as the frequency domain deformation threshold of the acoustic wave detection signal, and the product of the first mean value and the second mean value is used as the time domain deformation threshold of the acoustic wave detection signal.

[0088] For each micro-pile foundation to be measured, the product between the updated fluctuation amplitude of the acoustic wave detection signal of the micro-pile foundation and the signal distortion coefficient is calculated as the first product of each micro-pile foundation to be measured, and the first product is compared with the time domain deformation threshold of the acoustic wave detection signal; the attenuation value of the acoustic wave detection signal of the micro-pile foundation is calculated, and the attenuation value of the acoustic wave detection signal is compared with the frequency domain deformation threshold of the acoustic wave detection signal.

[0089] For each micro-pile foundation to be measured, if the first product of the micro-pile foundation is greater than the time domain deformation threshold of the acoustic detection signal, and the attenuation value of the acoustic detection signal is greater than the frequency domain deformation threshold of the acoustic detection signal, it means that the micro-pile foundation to be measured has a more serious structural deformation defect than the normal micro-pile foundation.

[0090] If the first product of the micro pile foundation is less than the time domain deformation threshold of the acoustic detection signal, and the attenuation value of the acoustic detection signal is less than the frequency domain deformation threshold of the acoustic detection signal, it means that the internal structure of the micro pile foundation to be measured is normal without obvious defects.

[0091] Otherwise, it means that the micropile foundation to be measured has internal structural deformation defects.

[0092] Based on the same inventive concept as the above method, an embodiment of the present application also provides a deformation measurement system for a micro-steep slope foundation pile, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, the steps of the deformation measurement method for a micro-steep slope foundation pile described in any one of the above-mentioned deformation measurement methods for a micro-steep slope foundation pile are implemented.

[0093] Similarly, based on the same inventive concept as the above method, an embodiment of the present application provides a deformation measurement device for a micro large-slope foundation pile, the device comprising:

[0094] Signal acquisition module, collecting micro pile foundation acoustic wave detection signals;

[0095] A threshold acquisition module is used to obtain the updated fluctuation amplitude of the micropile foundation acoustic wave detection signal based on the discrete amplitude and difference of the micropile foundation acoustic wave detection signal; obtain the signal distortion coefficient based on the correlation between the amplitudes of the micropile foundation acoustic wave detection signal; obtain the acoustic wave detection distribution frequency based on the frequency domain distribution characteristics of the micropile foundation acoustic wave detection signal in each interval; obtain the acoustic wave detection signal attenuation value of the micropile foundation acoustic wave detection signal based on the acoustic wave detection distribution frequency and the energy of the micropile foundation acoustic wave detection signal; obtain the acoustic wave detection signal time domain deformation threshold and the acoustic wave detection signal frequency domain deformation threshold based on the amplitude of the micropile foundation acoustic wave detection signal, the signal distortion coefficient and the acoustic wave detection signal attenuation value;

[0096] The deformation measurement module is used to measure the deformation of micro-high-slope foundation piles based on the updated fluctuation amplitude, signal distortion coefficient and acoustic detection signal attenuation value, combined with the acoustic detection signal time domain deformation threshold and the acoustic detection signal frequency domain deformation threshold. Figure 2 shown.

[0097] It should be noted that the above sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above is a description of a specific embodiment of this specification. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0098] The various embodiments in the present application are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0099] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application should be included in the protection scope of the present application.

Claims

1. A deformation measurement method for micro large slope foundation piles, characterized in that: The method comprises the following steps: Collecting micro pile foundation acoustic wave detection signals; obtaining updated fluctuation amplitudes of the micro pile foundation acoustic wave detection signals based on discrete amplitudes and differences of the micro pile foundation acoustic wave detection signals; Based on the correlation between the amplitudes of the acoustic detection signals of the micro pile foundation, the signal distortion coefficient is obtained; Based on the frequency domain distribution characteristics of the acoustic wave detection signal of the micro pile foundation in each interval, the acoustic wave detection distribution frequency is obtained; Based on the acoustic wave detection distribution frequency and the energy of the acoustic wave detection signal of the micropile foundation, an acoustic wave detection signal attenuation value of the acoustic wave detection signal of the micropile foundation is obtained; Based on the amplitude of the acoustic wave detection signal of the micro pile foundation, the signal distortion coefficient and the attenuation value of the acoustic wave detection signal, the time domain deformation threshold of the acoustic wave detection signal and the frequency domain deformation threshold of the acoustic wave detection signal are obtained; According to the updated fluctuation amplitude, signal distortion coefficient and acoustic detection signal attenuation value, combined with the acoustic detection signal time domain deformation threshold and the acoustic detection signal frequency domain deformation threshold, the deformation measurement of the micro large slope foundation pile is carried out.

2. A deformation measurement method for a micro-high-slope foundation pile as claimed in claim 1, characterized in that: The method for obtaining the fluctuation amplitude is: Based on the discrete amplitude of the micro-pile foundation acoustic wave detection signal, the acoustic wave amplitude fluctuation range of the micro-pile foundation acoustic wave detection signal is obtained; Obtain the vibration index of the acoustic detection signal based on the extreme difference of the acoustic wave amplitude fluctuation; The time taken for the micro pile foundation acoustic wave detection signal to be sent and received is recorded as the acoustic wave detection propagation time; The ratio of the acoustic detection signal fluctuation amplitude to the acoustic detection propagation time is calculated as the updated fluctuation amplitude of the micropile foundation acoustic detection signal.

3. A deformation measurement method for a micro-high-slope foundation pile as claimed in claim 2, characterized in that: The method for obtaining the acoustic wave amplitude fluctuation range and the acoustic wave detection signal vibration index is as follows: Dividing the acoustic wave detection signal of the micropile foundation into windows of preset lengths; For each window, the range of the fluctuation amplitude of the micropile foundation acoustic wave detection signal in the window is calculated, and the average of the ranges of the signal fluctuation amplitudes in all windows of the micropile foundation acoustic wave detection signal is recorded as the acoustic wave amplitude fluctuation range; For each window, the difference between the maximum value of the micropile foundation acoustic wave detection signal fluctuation amplitude and the extreme difference of the acoustic wave amplitude fluctuation in the window is calculated as the first amplitude difference, and the sum of the first amplitude differences of all windows is calculated as the acoustic wave detection signal vibration index.

4. The deformation measurement method of a micro-high-slope foundation pile according to claim 1, characterized in that: The method for obtaining the signal distortion coefficient is: Obtain the maximum amplitude point of the micro pile foundation acoustic wave detection signal; The micropile foundation pile acoustic wave detection signal is divided into a left micropile foundation pile acoustic wave detection signal and a right micropile foundation pile acoustic wave detection signal with the maximum amplitude point as the center; The distance between the acoustic wave detection signal of the left micropile foundation and the acoustic wave detection signal of the right micropile foundation is calculated as the signal distortion coefficient.

5. A deformation measurement method for micro-high-slope foundation piles as claimed in claim 4, characterized in that: The method for obtaining the acoustic wave detection distribution frequency is: The acoustic wave detection signal of the micro pile foundation is divided into two time series signals, namely, the front section signal of the acoustic wave detection and the back section signal of the acoustic wave detection, and the front section signal of the acoustic wave detection and the back section signal of the acoustic wave detection are respectively used as the input of the discrete Fourier algorithm, and the output results are respectively recorded as the front section frequency domain signal of the acoustic wave detection and the back section frequency domain signal of the acoustic wave detection; The frequency domain signal of the front section of the acoustic wave detection and the frequency domain signal of the back section of the acoustic wave detection are equally divided into a preset number of intervals, and the ratio of the number of frequency values ​​in each interval to the total number of frequency values ​​in the acoustic wave detection signal of the micropile foundation is recorded as the acoustic wave detection interval distribution frequency of each interval; The mean of the acoustic wave detection interval distribution frequencies of all intervals in the frequency domain signal before acoustic wave detection is taken as the acoustic wave detection distribution frequency of the frequency domain signal before acoustic wave detection, and the mean of the acoustic wave detection interval distribution frequencies of all intervals in the frequency domain signal after acoustic wave detection is taken as the acoustic wave detection distribution frequency of the frequency domain signal after acoustic wave detection.

6. A deformation measurement method for micro-high-slope foundation piles as claimed in claim 5, characterized in that: The method for obtaining the attenuation value of the acoustic wave detection signal is: The acoustic detection distribution frequencies of the frequency domain signals of the front section of acoustic detection and the frequency domain signals of the back section of acoustic detection are used as probabilities in the information entropy formula to calculate the information entropy of the signals of the front section of acoustic detection and the signals of the back section of acoustic detection; Calculate the product of information entropy and energy of the front-end signal of the acoustic wave detection as the frequency domain energy value of the front-end signal of the acoustic wave detection, and calculate the product of information entropy and energy of the rear-end signal of the acoustic wave detection as the frequency domain energy value of the rear-end signal of the acoustic wave detection; The absolute value of the difference between the frequency domain energy values ​​of the acoustic wave detection front-end signal and the acoustic wave detection back-end signal is recorded as the acoustic wave detection signal attenuation value.

7. The deformation measurement method of a micro-high-slope foundation pile according to claim 1, characterized in that: The method for obtaining the acoustic wave detection signal time domain deformation threshold and the acoustic wave detection signal frequency domain deformation threshold is: Acquiring the amplitude, signal distortion coefficient and acoustic wave detection signal attenuation value of the micropile foundation acoustic wave detection signal of a preset number of defect-free preset standard micropile foundation piles; The average value of the amplitude of the acoustic wave detection signal of the micropile foundation piles of a preset number of defect-free preset standard micropile foundation piles is calculated as the first mean value, the average value of the signal distortion coefficient of the preset number of defect-free preset standard micropile foundation piles is calculated as the second mean value, the average value of the attenuation value of the acoustic wave detection signal of the preset number of defect-free preset standard micropile foundation piles is calculated as the frequency domain deformation threshold of the acoustic wave detection signal, and the product of the first mean value and the second mean value is used as the time domain deformation threshold of the acoustic wave detection signal.

8. The deformation measurement method of a micro-high-slope foundation pile according to claim 1, characterized in that: The deformation measurement of the micro large-slope foundation pile includes: For each micropile foundation pile to be measured, calculating the product between the updated fluctuation amplitude of the micropile foundation pile acoustic wave detection signal and the signal distortion coefficient as the first product of each micropile foundation pile to be measured; For each micro-pile foundation to be measured, if the first product of the micro-pile foundation is greater than the time domain deformation threshold of the acoustic detection signal, and the attenuation value of the acoustic detection signal is greater than the frequency domain deformation threshold of the acoustic detection signal, the micro-pile foundation has serious structural deformation defects; If the first product of the micropile foundation pile is less than the time domain deformation threshold of the acoustic detection signal, and the attenuation value of the acoustic detection signal is less than the frequency domain deformation threshold of the acoustic detection signal, the micropile foundation pile structure is normal and has no defects; Otherwise, the micro pile foundation will have internal structural deformation defects.

9. A deformation measurement system for micro-high-slope foundation piles, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the deformation measurement method of a micro-large-slope foundation pile as described in any one of claims 1-8 are implemented.

10. A deformation measurement device for micro large slope foundation piles, characterized in that: The measuring device comprises: A signal acquisition module, used to collect acoustic wave detection signals of micro pile foundations; A threshold acquisition module is used to obtain the updated fluctuation amplitude of the micropile foundation acoustic wave detection signal based on the discrete amplitude and difference of the micropile foundation acoustic wave detection signal; obtain the signal distortion coefficient based on the correlation between the amplitudes of the micropile foundation acoustic wave detection signal; obtain the acoustic wave detection distribution frequency based on the frequency domain distribution characteristics of the micropile foundation acoustic wave detection signal in each interval; obtain the acoustic wave detection signal attenuation value of the micropile foundation acoustic wave detection signal based on the acoustic wave detection distribution frequency and the energy of the micropile foundation acoustic wave detection signal; obtain the acoustic wave detection signal time domain deformation threshold and the acoustic wave detection signal frequency domain deformation threshold based on the amplitude of the micropile foundation acoustic wave detection signal, the signal distortion coefficient and the acoustic wave detection signal attenuation value; The deformation measurement module is used to measure the deformation of micro large-slope foundation piles based on the updated fluctuation amplitude, signal distortion coefficient and acoustic detection signal attenuation value, combined with the acoustic detection signal time domain deformation threshold and the acoustic detection signal frequency domain deformation threshold.

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