Pipeline deformation monitoring method, device and system for pipe jacking construction

Abstract

The invention relates to the technical field of metering equipment characterized by adopting sound waves, in particular to a pipeline deformation monitoring method, device and system for pipe jacking construction, and the method comprises the steps: in the pipe jacking construction process, obtaining the jacking-in speed of a pipeline, arranging a plurality of monitoring points on the pipeline, and obtaining ultrasonic signals of the monitoring points from the moment that the monitoring points enter a soil layer; the method comprises the following steps: determining a reference time period of a monitoring point before the monitoring point according to a jacking speed difference after the monitoring point enters a soil layer, and determining a deformation degree of a pipeline position where the monitoring point is located at a current moment according to a difference between an ultrasonic signal of the monitoring point and an ultrasonic signal in the reference time period corresponding to the monitoring point before the monitoring point; therefore, whether the pipeline position where the monitoring point is located deforms or not is judged. According to the method, whether the pipeline at the monitoring points deforms or not is determined by analyzing the difference of the ultrasonic signals when different monitoring points pass through the same soil layer position, and the accuracy of pipeline deformation monitoring of pipe jacking construction is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metering equipment characterized by the use of sound waves, and in particular to a pipeline deformation monitoring method, device and system for pipe jacking construction. Background Art

[0002] Pipe jacking is a key underground pipe laying method in pipeline projects, offering advantages such as trenchless laying, cost savings, and reduced pollution. Pipeline laying can be completed quickly by placing and splicing the pipe in sections, then gradually jacking it in with a pipe jack. However, pipelines are prone to deformation when subjected to uneven forces, posing a significant threat to construction safety and even causing serious hazards such as surface deformation. Therefore, effective monitoring of pipeline deformation during construction is essential to prevent and mitigate potential problems.

[0003] Existing problems: Current pipeline deformation monitoring mostly uses laser theodolites to obtain deformation parameters based on the differences in the laser's landing points. However, this monitoring method is only effective for large-scale pipeline deformation monitoring. When the designed and constructed pipeline is bent, this method will fail, resulting in the pipeline still relying on manual methods to determine deformation, and the accuracy of deformation monitoring is low. Summary of the Invention

[0004] The present invention provides a pipeline deformation monitoring method, device and system for pipe jacking construction, so as to solve the existing problems.

[0005] The present invention provides a pipeline deformation monitoring method, device, and system for pipe jacking construction using the following technical solutions:

[0006] One embodiment of the present invention provides a pipeline deformation monitoring method for pipe jacking construction, the method comprising the following steps:

[0007] During the pipe jacking construction process, the penetration speed of the pipeline at each moment is obtained, and several monitoring points are set at equal intervals on the pipeline. From the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point is obtained at each moment.

[0008] Starting from the moment each monitoring point enters the soil layer, a window is formed by a number of consecutive moments, and a number of windows are formed without repetition; based on the difference in the penetration speed of each monitoring point and each monitoring point before each monitoring point at all moments in the window with the same sequence number, the reference time period corresponding to each monitoring point before each monitoring point is determined;

[0009] Determine the degree of deformation of the pipeline at each monitoring point at the current moment based on the difference between the ultrasonic signal at each monitoring point at each moment and the ultrasonic signal at each moment in a reference period corresponding to each monitoring point before each monitoring point;

[0010] According to the deformation degree of the pipeline position where each monitoring point is located at the current moment, it is determined whether the pipeline position where each monitoring point is located at the current moment is deformed.

[0011] Furthermore, the specific steps of determining the reference time period corresponding to each monitoring point before each monitoring point include the following:

[0012] Among the monitoring points that have entered the soil layer before the current moment, the monitoring points before the i-th monitoring point are recorded as historical monitoring points;

[0013] For the i-th monitoring point, the window at the current moment is recorded as the q-th window;

[0014] According to the difference in the jacking speed at all moments in the period from the 1st window to the qth window corresponding to the ith monitoring point and the jth historical monitoring point, the difference in the jacking depth between the ith monitoring point and the jth historical monitoring point is determined;

[0015] Determine the expansion radius r between the i-th monitoring point and the j-th historical monitoring point according to the difference in the penetration depth between the i-th monitoring point and the j-th historical monitoring point;

[0016] The period between the qrth window and the q+rth window corresponding to the jth historical monitoring point is recorded as the reference period corresponding to the jth historical monitoring point.

[0017] Furthermore, the specific steps of determining the difference in penetration depth between the i-th monitoring point and the j-th historical monitoring point are as follows:

[0018] In the period between the 1st window and the qth window corresponding to the i-th monitoring point, the average of the jacking speeds at all times is taken as the current average jacking speed of the i-th monitoring point;

[0019] In the period between the 1st window and the qth window corresponding to the jth historical monitoring point, the average of the jacking speeds at all times is used as the reference average jacking speed of the jth historical monitoring point;

[0020] The normalized value of the absolute value of the difference between the current average penetration speed of the i-th monitoring point and the reference average penetration speed of the j-th historical monitoring point is calculated as the penetration depth difference between the i-th monitoring point and the j-th historical monitoring point.

[0021] Furthermore, the specific steps of determining the expansion radius between the i-th monitoring point and the j-th historical monitoring point are as follows:

[0022] The rounded-up value of the product of the difference in penetration depth between the i-th monitoring point and the j-th historical monitoring point and the preset quantity threshold is used as the expansion radius between the i-th monitoring point and the j-th historical monitoring point.

[0023] Furthermore, the step of determining the deformation degree of the pipeline at each monitoring point at the current moment includes the following specific steps:

[0024] Determine the current difference between the i-th monitoring point and the j-th historical monitoring point based on the ultrasonic signals at all times in the q-th window corresponding to the i-th monitoring point and the ultrasonic signals at all times in the reference period corresponding to the j-th historical monitoring point;

[0025] According to the current difference between the ith monitoring point and all historical monitoring points, the deformation degree of the pipeline position where the ith monitoring point is located at the current moment is determined.

[0026] Furthermore, the determining of the current difference between the i-th monitoring point and the j-th historical monitoring point includes the following specific steps:

[0027] The sequence consisting of the ultrasonic signals at all moments in the qth window corresponding to the i-th monitoring point is recorded as the first sequence, and the sequence consisting of the ultrasonic signals at all moments in the reference period corresponding to the j-th historical monitoring point is recorded as the second sequence. The DTW algorithm is used to obtain the DTW distance between the first sequence and the second sequence as the current difference between the i-th monitoring point and the j-th historical monitoring point.

[0028] Furthermore, the step of determining the deformation degree of the pipeline at the i-th monitoring point at the current moment includes the following specific steps:

[0029] Calculate the variance of the current difference between the i-th monitoring point and all historical monitoring points, then calculate the sum of the inversely proportional normalized value of the variance and a preset constant, and use the normalized value of the sum multiplied by the current difference between the i-th monitoring point and the last historical monitoring point as the deformation degree of the pipeline position at the i-th monitoring point at the current moment.

[0030] Furthermore, the specific steps of determining whether deformation occurs at the position of each monitoring point in the pipeline at the current moment include:

[0031] Among the monitoring points that have entered the soil layer before the current moment, when the deformation degree of the pipeline position at the i-th monitoring point at the current moment is greater than the preset judgment threshold, it is determined that the pipeline position at the i-th monitoring point at the current moment is deformed.

[0032] A pipeline deformation monitoring device for pipe jacking construction adopts the pipeline deformation monitoring method for pipe jacking construction, and the device includes the following modules:

[0033] Pipe jacking construction data acquisition module: used to obtain the jacking speed of the pipeline at every moment during the pipe jacking construction process, and set several monitoring points at equal intervals on the pipeline. From the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point is obtained at every moment;

[0034] Reference period determination module: used to form several windows with a number of consecutive moments starting from each monitoring point entering the soil layer without repetition; according to the difference in the jacking speed of each monitoring point and each monitoring point before each monitoring point at all moments in the window with the same sequence number, determine the reference period corresponding to each monitoring point before each monitoring point;

[0035] Deformation degree analysis module: determines the deformation degree of the pipeline position at each monitoring point at the current moment based on the difference between the ultrasonic signal at each monitoring point at each moment and the ultrasonic signal at each moment in the reference period corresponding to each monitoring point before each monitoring point;

[0036] Pipeline deformation judgment module: according to the deformation degree of the pipeline position at each monitoring point at the current moment, judge whether the pipeline position at each monitoring point at the current moment is deformed.

[0037] The present invention also proposes a pipeline deformation monitoring system for pipe jacking construction, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor executes the computer program stored in the memory to implement the steps of the aforementioned pipeline deformation monitoring method for pipe jacking construction.

[0038] The beneficial effects of the technical solution of the present invention are:

[0039] In an embodiment of the present invention, during the pipe jacking construction process, the pipe jacking speed at each moment is obtained, and several monitoring points are set at equal intervals on the pipe. Starting from the moment each monitoring point enters the soil layer, an ultrasonic signal is obtained at each monitoring point at each moment. Based on the difference in the jacking speed after each monitoring point enters the soil layer, the reference time period corresponding to each monitoring point before each monitoring point is determined. In this way, the time period during which the previous monitoring point passed through the same soil layer position is determined, thereby ensuring the accuracy of subsequent ultrasonic signal analysis. Based on the difference between the ultrasonic signal of each monitoring point and the ultrasonic signal of each monitoring point before it within the reference time period, the deformation degree of the pipe position at each monitoring point at the current moment is determined. Based on the reason why pipe deformation causes soil layer changes, thereby causing ultrasonic signal changes, the deformation degree is determined based on the difference in ultrasonic signals between the current monitoring point and the historical monitoring points when they passed through the same soil layer position, thereby ensuring the accuracy of pipe deformation analysis, thereby determining whether the pipe position at each monitoring point at the current moment is deformed. Thus, the present invention determines whether the pipeline at the monitoring point has deformed by analyzing the difference in ultrasonic signals at different monitoring points when passing through the same soil layer, thereby improving the accuracy of pipeline deformation monitoring during pipe jacking construction, effectively solving the shortcomings of traditional laser theodolite monitoring, and avoiding the problem of deformation monitoring failure caused by bent pipeline construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 This is a flow chart of the steps of a pipeline deformation monitoring method for pipe jacking construction according to the present invention;

[0042] Figure 2 This is a module flow chart of a pipeline deformation monitoring device for pipe jacking construction according to the present invention;

[0043] Figure 3 This is a schematic diagram of the installation of ultrasonic sensors during pipe jacking construction;

[0044] Figure 4 It is a curve diagram showing the change of pipeline jacking speed with time;

[0045] Figure 5 Schematic diagram of the curve showing the ultrasonic signal corresponding to each monitoring point changing with time. DETAILED DESCRIPTION

[0046] To further illustrate the technical means and effectiveness of the present invention in achieving its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effectiveness of a pipeline deformation monitoring method, device, and system for pipe jacking construction proposed by the present invention. In the following description, references to different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0047] 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 invention belongs.

[0048] The following describes in detail a pipeline deformation monitoring method, device and system for pipe jacking construction provided by the present invention with reference to the accompanying drawings.

[0049] See also Figure 1 , which shows a flowchart of a pipeline deformation monitoring method for pipe jacking construction provided by one embodiment of the present invention, the method comprising the following steps:

[0050] Step S001: During the pipe jacking construction process, the jacking speed of the pipe is obtained at each moment, and several monitoring points are set at equal intervals on the pipe. Starting from each monitoring point entering the soil layer, the ultrasonic signal of each monitoring point is obtained at each moment.

[0051] During the pipe jacking construction process, the jacking speed of the pipeline at each moment is collected, and several monitoring points are set at equal intervals on the pipeline. From the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point is collected at each moment.

[0052] What needs to be explained is that the specific process of pipe jacking construction is: dig a vertical shaft at the starting point and the end point respectively, as the working shaft and the receiving shaft. In the working shaft, connect the machine head to the front end of the pipe, start from the pipe jacking mouth, and use a jack to push the pipe into the soil layer section by section along the pipe jacking direction. Every time a section of pipe is pushed in, a new section of pipe needs to be connected at the pipe jacking mouth, and then continue to push until it reaches the receiving shaft and completes the jacking operation. In this embodiment, a speed sensor is used to collect the jacking speed of the pipeline, and an ultrasonic sensor is installed at each monitoring point to collect the ultrasonic signal after each monitoring point enters the soil layer. The monitoring points are set at equal intervals of one section of pipe. An ultrasonic sensor is installed in the middle of the pipe. The frequency of collecting each data is once per second. This is described as an example. Schematic diagram of the installation of ultrasonic sensors during pipe jacking construction, as shown Figure 3 shown.

[0053] Step S002: Starting from the moment each monitoring point enters the soil layer, a window is formed with several consecutive moments, and several windows are formed without repetition; based on the difference in the jacking speed of each monitoring point and each monitoring point before each monitoring point at all moments in the window with the same serial number, the reference time period corresponding to each monitoring point before each monitoring point is determined.

[0054] During the pipe jacking construction process, the pipeline is pushed into the designed channel in stages by jacks. If the jacking speed and force of the jacks do not match the actual situation, it is easy to cause local pipeline deformation. The deformation of the pipeline will change the original normal contact between the outer surface of the pipeline and the soil and gravel, which will in turn cause the density of the soil and gravel at the local deformation position to change. Therefore, the soil and gravel density of the outer surface is obtained through the ultrasonic sensor installed inside. The greater the density change, the higher the possibility of deformation and the greater the degree of deformation.

[0055] After the first ultrasonic sensor is installed and reaches the preset penetration depth, a second ultrasonic sensor is installed. As the second ultrasonic sensor gradually enters the channel, the ultrasonic signal is compared with the ultrasonic signal from the previous sensor at the same location in the channel to determine the degree of deformation. This allows real-time determination of whether the pipeline section between the first and second ultrasonic sensors has deformed. Subsequently, a third ultrasonic sensor is installed, and by comparing the signal with the previous signal, the degree of deformation of the pipeline section between the second and third ultrasonic sensors is determined in real time. Similarly, the degree of deformation at every location along the entire pipeline can be determined in real time.

[0056] Considering the potential for pipeline corrections, which can cause changes in the jacking speed, this change in jacking speed can affect the soil density location corresponding to the ultrasonic signal. Therefore, it is necessary to first align the ultrasonic signals based on the changing relationship between the jacking speeds. This involves obtaining different ultrasonic sensor signals at the same jacking depth. Secondly, the local deformation degree is determined based on the differences in ultrasonic sensor signals from different sensors, and finally, the location where the deformation occurred is determined.

[0057] In monitoring pipeline deformation, this embodiment obtains deformation data by comparing the ultrasonic signals of subsequent ultrasonic sensors with previous signals to identify pipeline deformation. As the ultrasonic sensors enter the construction channel after the machine jacking, the jacking speed varies due to operations such as deviation correction during gradual jacking. This results in signals acquired by different ultrasonic sensors indicating different external pipeline jacking positions, as indicated by the same signal position. For example, if the jacking speed is slow after the first ultrasonic sensor is installed, and faster after the second ultrasonic sensor is installed, then the jacking depth of the two signals of the same duration will be deeper when the sensor with the faster jacking speed is located.

[0058] Preferably, in one embodiment of the present invention, the method for obtaining the reference period corresponding to each historical monitoring point includes:

[0059] The preset time threshold n is 5, which is used as an example for description.

[0060] From the moment each monitoring point enters the soil layer, a window is formed at n consecutive moments, and several windows are formed without repetition. Thus, several windows corresponding to each monitoring point are obtained.

[0061] For example, if the second monitoring point enters the soil layer at time n, then the period from time n to time n+4 is the first window, and the period from time n+5 to time n+9 is the second window. If the current time is time n+12, then the period from time n+10 to the current time is the third window. Until the current time is time n+14 (including time n+14), the period from time n+10 to the current time is the third window, thus obtaining several windows corresponding to the second monitoring point. If the third monitoring point enters the soil layer at time m, then the period from time m to time m+4 is the first window corresponding to the third monitoring point.

[0062] It should be noted that if the pipe insertion speed remains unchanged, the soil positions represented by the ultrasonic signals of the same order windows corresponding to different monitoring points are the same. Figure 4 shown. Figure 4 In the coordinate system, the horizontal axis is time and the vertical axis is the jacking speed. The time corresponding to the 1st, 2nd and 3rd dotted lines on the horizontal axis respectively represents the start time of the first, second and third monitoring points entering the soil layer. The left and right periods corresponding to the kth window respectively represent the kth window corresponding to the first and second monitoring points. The curve diagram of the ultrasonic signal corresponding to each monitoring point changing with time is shown in Figure 1. Figure 5 shown. Figure 5 In the coordinate system, the horizontal axis is time and the vertical axis is the ultrasonic signal. It is the time domain waveform of the ultrasonic signal, which shows the amplitude of the ultrasonic signal changing with time. The time corresponding to the 1st and 2nd dotted lines on the horizontal axis respectively represents the starting time of the 1st and 2nd monitoring points entering the soil layer. The left and right time periods corresponding to the kth window respectively represent the kth window corresponding to the 1st and 2nd monitoring points. Among them, the long solid line starting from the time corresponding to the 1st dotted line on the horizontal axis above is the time domain waveform of the ultrasonic signal corresponding to the 1st monitoring point, and the short solid line starting from the time corresponding to the 2nd dotted line on the horizontal axis below is the time domain waveform of the ultrasonic signal corresponding to the 2nd monitoring point.

[0063] Therefore, the proportional length of the ultrasonic signals of adjacent ultrasonic sensors can be determined according to the curve of the jacking speed changing with time, because the jacking speed of the pipeline needs to be reduced during operations such as deviation correction to ensure the quality of jacking. The faster the jacking speed, the longer the actual jacking distance of the pipeline represented by the ultrasonic signal in a single window. For ultrasonic signals in windows of the same order, the ultrasonic sensor signal with a larger jacking distance corresponds to more soil layer positions in the window. The curves of other ultrasonic sensor signals with a smaller jacking distance require ultrasonic signals within a longer period of time to correspond to the same soil layer position. The time for generating ultrasonic signals in the same window order is consistent, so the difference in jacking distance is proportional to the difference in cumulative jacking speed.

[0064] Among the monitoring points that have entered the soil layer before the current moment, taking the i-th monitoring point as an example, the monitoring points before the i-th monitoring point are recorded as historical monitoring points.

[0065] It should be noted that: in this embodiment, i>1, and this is used as an example for description.

[0066] For the i-th monitoring point, the window at the current moment is recorded as the q-th window.

[0067] In the period between the 1st window and the qth window corresponding to the i-th monitoring point (including the 1st window and the qth window), the average of the jacking speeds at all times is taken as the current average jacking speed of the i-th monitoring point.

[0068] Taking the jth historical monitoring point as an example, during the period from the 1st window to the qth window corresponding to the jth historical monitoring point (including the 1st window and the qth window), the average of the penetration speeds at all times is used as the reference average penetration speed of the jth historical monitoring point.

[0069] Calculate the normalized value of the absolute value of the difference between the current average penetration velocity of the i-th monitoring point and the reference average penetration velocity of the j-th historical monitoring point as the penetration depth difference between the i-th monitoring point and the j-th historical monitoring point.

[0070] It should be noted that the normalized value of the absolute value of the difference is obtained by using the norm() linear normalization function in this embodiment to normalize the absolute value of the difference to between 0 and 1.

[0071] The preset quantity threshold is 10, which is used as an example for description.

[0072] The product of the difference in penetration depth between the i-th monitoring point and the j-th historical monitoring point and the preset number threshold is rounded up to an integer value as the expansion radius r between the i-th monitoring point and the j-th historical monitoring point.

[0073] The period between the qrth window and the q+rth window corresponding to the jth historical monitoring point (including the 1st window and the qth window) is recorded as the reference period corresponding to the jth historical monitoring point.

[0074] What needs to be explained is that for the j-th historical monitoring point, the window in which the current moment is located is recorded as the p-th window. When qr<1, let qr=1, and when q+r>p, let q+r=p, thereby ensuring that the reference period corresponding to the j-th historical monitoring point is within the period from the start of the j-th historical monitoring point entering the soil layer to the current moment. When the difference in the penetration depth between the i-th monitoring point and the j-th historical monitoring point is large, a larger r is assigned, thereby ensuring that within the reference period corresponding to the j-th historical monitoring point, the soil layer position passed by the j-th historical monitoring point includes the soil layer position passed by the i-th monitoring point in the q-th window.

[0075] According to the above method, the reference time period corresponding to each historical monitoring point is obtained.

[0076] Step S003: Determine the deformation degree of the pipeline position at each monitoring point at the current moment based on the difference between the ultrasonic signal at each monitoring point at each moment and the ultrasonic signal at each moment in the reference period corresponding to each monitoring point before each monitoring point.

[0077] If the pipeline deformation occurs at the current position of the i-th monitoring point at this time, the soil structure at this position will change, resulting in a difference between the ultrasonic signal of the i-th monitoring point in the q-th window and the ultrasonic signal of the historical sensor in the reference period. Since the pipeline where the historical sensor is located is normal when passing through this position, the greater the difference in ultrasonic signals between the i-th monitoring point and the i-1-th monitoring point when passing through the current position, and the smaller the difference in ultrasonic signals of all historical monitoring points when passing through the current position, the higher the degree of deformation at the current position of the i-th monitoring point.

[0078] Preferably, in one embodiment of the present invention, the method for obtaining the deformation degree of the pipeline position where the i-th monitoring point is located at the current moment includes:

[0079] The sequence consisting of the ultrasonic signals at all moments in the qth window corresponding to the i-th monitoring point is recorded as the first sequence, and the sequence consisting of the ultrasonic signals at all moments in the reference period corresponding to the j-th historical monitoring point is recorded as the second sequence. The DTW algorithm is used to obtain the DTW distance between the first and second sequences as the current difference between the i-th monitoring point and the j-th historical monitoring point.

[0080] It should be noted that the DTW algorithm is a well-known technique and the specific method will not be introduced here. The smaller the DTW distance, the more similar the two sequences are.

[0081] According to the above method, the current difference between the i-th monitoring point and each historical monitoring point is obtained.

[0082] The preset constant is 1, and this is used as an example for description.

[0083] Calculate the variance V of the current difference between the i-th monitoring point and all historical monitoring points, then calculate the sum of the inverse proportional normalized value of the variance and a preset constant. The normalized value of the sum multiplied by the current difference between the i-th monitoring point and the last historical monitoring point is used as the deformation degree of the pipeline position where the i-th monitoring point is located at the current moment.

[0084] It should be noted that: this embodiment uses exp(-V) to present the inverse proportional relationship and normalization processing of V. The implementer can set the inverse proportional function and normalization function according to the actual situation. exp() is an exponential function with a natural constant as the base. The normalized value of the above product, in this embodiment, uses the norm() linear normalization function to normalize the product to between 0 and 1. The last historical monitoring point is the i-1th monitoring point. If there is only one historical monitoring point, the variance V cannot be calculated. In this embodiment, the preset constant 1 is used as the sum of the inverse proportional normalization value of V and the preset constant, and this is used as an example for description. The greater the current difference between the i-th monitoring point and the last historical monitoring point, the greater the difference in ultrasonic signals between the i-th monitoring point and the i-1-th monitoring point when passing through the same soil layer position, and the greater the degree of deformation of the pipeline position where the i-th monitoring point is located at the current moment. The smaller the variance of the current difference between the i-th monitoring point and all historical monitoring points, the more similar the current difference between the i-th monitoring point and each historical monitoring point is, that is, the ultrasonic information of all historical monitoring points at the soil layer where the i-th monitoring point is located at the current moment is similar, that is, the pipeline positions of the historical monitoring points are all normal, and the more credible the current difference between the i-th monitoring point and the last historical monitoring point is, so the inverse proportion of the variance is taken for adjustment.

[0085] Step S004: determining whether deformation occurs at the pipeline location of each monitoring point at the current moment based on the degree of deformation at the pipeline location of each monitoring point at the current moment.

[0086] Preferably, in one embodiment of the present invention, a method for determining whether deformation occurs at the position of the pipeline at the i-th monitoring point at the current moment includes:

[0087] The preset judgment threshold is 0.43, and this is used as an example for description.

[0088] When the deformation degree of the pipeline position where the i-th monitoring point is located at the current moment is greater than a preset judgment threshold, it is determined that the pipeline position where the i-th monitoring point is located at the current moment is deformed.

[0089] In this manner, among the monitoring points that have entered the soil layer before the current moment, it is determined whether deformation has occurred at the pipeline location at each monitoring point at the current moment. This completes deformation monitoring of the pipeline location at each monitoring point that has entered the soil layer at the current moment. The deformation monitoring result for the pipeline location at the second monitoring point is also used to represent the deformation monitoring result for the pipeline location at the first monitoring point.

[0090] As pipeline construction progresses, the number of ultrasonic sensors gradually increases, and the monitoring range also gradually expands. The degree of deformation at each subsequent ultrasonic sensor location is calculated in real time, thereby capturing the deformation at each location throughout the pipeline construction process. If deformation occurs at any monitoring point at any moment, the early warning device issues an alert, interrupting the jacking process and enabling emergency response.

[0091] Second, see Figure 2 , Figure 2 This is a module flow chart of a pipeline deformation monitoring device for pipe jacking construction according to the present invention, which shows a pipeline deformation monitoring device for pipe jacking construction according to one embodiment of the present invention. The device includes the following modules:

[0092] Pipe jacking construction data acquisition module: used to obtain the jacking speed of the pipeline at every moment during the pipe jacking construction process, and set several monitoring points at equal intervals on the pipeline. From the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point is obtained at every moment;

[0093] Reference period determination module: used to form several windows with a number of consecutive moments starting from each monitoring point entering the soil layer without repetition; according to the difference in the jacking speed of each monitoring point and each monitoring point before each monitoring point at all moments in the window with the same sequence number, determine the reference period corresponding to each monitoring point before each monitoring point;

[0094] Deformation degree analysis module: determines the deformation degree of the pipeline position at each monitoring point at the current moment based on the difference between the ultrasonic signal at each monitoring point at each moment and the ultrasonic signal at each moment in the reference period corresponding to each monitoring point before each monitoring point;

[0095] Pipeline deformation judgment module: according to the deformation degree of the pipeline position at each monitoring point at the current moment, judge whether the pipeline position at each monitoring point at the current moment is deformed.

[0096] In a third aspect, the present invention also provides a pipeline deformation monitoring system for pipe jacking construction, comprising a memory, a processor, and a computer program stored in the memory and runnable on the processor, wherein the processor executes the computer program stored in the memory to implement the steps of the aforementioned pipeline deformation monitoring method for pipe jacking construction.

[0097] So far, the present invention is completed.

[0098] In summary, in an embodiment of the present invention, during the pipe jacking construction process, the penetration speed of the pipeline at each moment is obtained, and a number of monitoring points are set at equal intervals on the pipeline. Starting from the moment each monitoring point enters the soil layer, an ultrasonic signal is obtained at each monitoring point at each moment. Based on the difference in penetration speed after each monitoring point enters the soil layer, the reference time period corresponding to each monitoring point before each monitoring point is determined. Based on the difference in the ultrasonic signal of each monitoring point and the ultrasonic signal within the reference time period corresponding to each monitoring point before it, the degree of deformation of the pipeline position at each monitoring point at the current moment is determined, thereby determining whether the pipeline position at each monitoring point at the current moment has deformed. The present invention determines whether the pipeline at the monitoring point has deformed by analyzing the difference in ultrasonic signals of different monitoring points when passing through the same soil layer, thereby improving the accuracy of pipeline deformation monitoring during pipe jacking construction.

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

Claims

1. A pipeline deformation monitoring method for pipe jacking construction, characterized in that: The method comprises the following steps: During the pipe jacking construction process, the penetration speed of the pipeline at each moment is obtained, and several monitoring points are set at equal intervals on the pipeline. From the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point is obtained at each moment. Starting from the moment each monitoring point enters the soil layer, a window is formed by a number of consecutive moments, and a number of windows are formed without repetition; based on the difference in the penetration speed of each monitoring point and each monitoring point before each monitoring point at all moments in the window with the same sequence number, the reference time period corresponding to each monitoring point before each monitoring point is determined; Determine the degree of deformation of the pipeline at each monitoring point at the current moment based on the difference between the ultrasonic signal at each monitoring point at each moment and the ultrasonic signal at each moment in a reference period corresponding to each monitoring point before each monitoring point; According to the deformation degree of the pipeline position where each monitoring point is located at the current moment, it is determined whether the pipeline position where each monitoring point is located at the current moment is deformed.

2. A pipeline deformation monitoring method for pipe jacking construction according to claim 1, characterized in that: The specific steps of determining the reference time period corresponding to each monitoring point before each monitoring point are as follows: Among the monitoring points that have entered the soil layer before the current moment, the monitoring points before the i-th monitoring point are recorded as historical monitoring points; For the i-th monitoring point, the window at the current moment is recorded as the q-th window; According to the difference in the jacking speed at all moments in the period from the 1st window to the qth window corresponding to the ith monitoring point and the jth historical monitoring point, the difference in the jacking depth between the ith monitoring point and the jth historical monitoring point is determined; Determine the expansion radius r between the i-th monitoring point and the j-th historical monitoring point according to the difference in the penetration depth between the i-th monitoring point and the j-th historical monitoring point; The period between the qrth window and the q+rth window corresponding to the jth historical monitoring point is recorded as the reference period corresponding to the jth historical monitoring point.

3. A pipeline deformation monitoring method for pipe jacking construction according to claim 2, characterized in that: The specific steps of determining the difference in penetration depth between the i-th monitoring point and the j-th historical monitoring point are as follows: In the period between the 1st window and the qth window corresponding to the i-th monitoring point, the average of the jacking speeds at all times is taken as the current average jacking speed of the i-th monitoring point; In the period between the 1st window and the qth window corresponding to the jth historical monitoring point, the average of the jacking speeds at all times is used as the reference average jacking speed of the jth historical monitoring point; The normalized value of the absolute value of the difference between the current average penetration speed of the i-th monitoring point and the reference average penetration speed of the j-th historical monitoring point is calculated as the penetration depth difference between the i-th monitoring point and the j-th historical monitoring point.

4. A pipeline deformation monitoring method for pipe jacking construction according to claim 2, characterized in that: The specific steps of determining the expansion radius of the i-th monitoring point and the j-th historical monitoring point are as follows: The rounded-up value of the product of the difference in penetration depth between the i-th monitoring point and the j-th historical monitoring point and the preset quantity threshold is used as the expansion radius between the i-th monitoring point and the j-th historical monitoring point.

5. The pipeline deformation monitoring method for pipe jacking construction according to claim 2, characterized in that: The specific steps of determining the deformation degree of the pipeline position at each monitoring point at the current moment include the following: Determine the current difference between the i-th monitoring point and the j-th historical monitoring point based on the ultrasonic signals at all times in the q-th window corresponding to the i-th monitoring point and the ultrasonic signals at all times in the reference period corresponding to the j-th historical monitoring point; According to the current difference between the ith monitoring point and all historical monitoring points, the deformation degree of the pipeline position where the ith monitoring point is located at the current moment is determined.

6. A pipeline deformation monitoring method for pipe jacking construction according to claim 5, characterized in that: The specific steps of determining the current difference between the i-th monitoring point and the j-th historical monitoring point are as follows: The sequence consisting of the ultrasonic signals at all moments in the qth window corresponding to the i-th monitoring point is recorded as the first sequence, and the sequence consisting of the ultrasonic signals at all moments in the reference period corresponding to the j-th historical monitoring point is recorded as the second sequence. The DTW algorithm is used to obtain the DTW distance between the first sequence and the second sequence as the current difference between the i-th monitoring point and the j-th historical monitoring point.

7. The pipeline deformation monitoring method for pipe jacking construction according to claim 5, characterized in that: The specific steps of determining the deformation degree of the pipeline position where the i-th monitoring point is located at the current moment include the following: Calculate the variance of the current difference between the i-th monitoring point and all historical monitoring points, then calculate the sum of the inversely proportional normalized value of the variance and a preset constant, and use the normalized value of the sum multiplied by the current difference between the i-th monitoring point and the last historical monitoring point as the deformation degree of the pipeline position at the i-th monitoring point at the current moment.

8. The pipeline deformation monitoring method for pipe jacking construction according to claim 1, characterized in that: The specific steps of determining whether deformation occurs at the pipeline position of each monitoring point at the current moment are as follows: Among the monitoring points that have entered the soil layer before the current moment, when the deformation degree of the pipeline position at the i-th monitoring point at the current moment is greater than the preset judgment threshold, it is determined that the pipeline position at the i-th monitoring point at the current moment is deformed.

9. A pipeline deformation monitoring device for pipe jacking construction, using a pipeline deformation monitoring method for pipe jacking construction according to any one of claims 1 to 8, characterized in that: The device includes the following modules: Pipe jacking construction data acquisition module: used to obtain the jacking speed of the pipeline at every moment during the pipe jacking construction process, and set several monitoring points at equal intervals on the pipeline. From the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point is obtained at every moment; Reference period determination module: used to form several windows with a number of consecutive moments starting from each monitoring point entering the soil layer without repetition; according to the difference in the jacking speed of each monitoring point and each monitoring point before each monitoring point at all moments in the window with the same sequence number, determine the reference period corresponding to each monitoring point before each monitoring point; Deformation degree analysis module: determines the deformation degree of the pipeline position at each monitoring point at the current moment based on the difference between the ultrasonic signal at each monitoring point at each moment and the ultrasonic signal at each moment in the reference period corresponding to each monitoring point before each monitoring point; Pipeline deformation judgment module: according to the deformation degree of the pipeline position at each monitoring point at the current moment, judge whether the pipeline position at each monitoring point at the current moment is deformed.

10. A pipeline deformation monitoring system for pipe jacking construction, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is executed by a processor, the steps of a pipeline deformation monitoring method for pipe jacking construction according to any one of claims 1 to 8 are implemented.

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