A pipeline deformation monitoring method, device and system for pipe jacking construction
By using ultrasonic signal monitoring and dynamic time warping algorithms in pipe jacking construction, the pipe deformation can be accurately analyzed, solving the problem of low accuracy of laser theodolite monitoring in existing technologies and achieving efficient monitoring of pipeline deformation.
Patent Information
- Application Number
- CN202510785920.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-12
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2045-06-12
AI Technical Summary
Existing pipeline deformation monitoring methods mainly rely on laser theodolites, which cannot accurately monitor local deformation of pipelines during construction. They fail especially when the pipeline is bent during design and construction, resulting in low monitoring accuracy.
The ultrasonic signal monitoring method is adopted. By acquiring the jacking speed of the pipe at each moment during the pipe jacking construction process and setting monitoring points at equal intervals on the pipe, the ultrasonic signal of each monitoring point is acquired by ultrasonic sensors. The deformation degree of the monitoring point is analyzed by combining the dynamic time warping algorithm (DTW) to determine the deformation of the pipe position.
It improves the accuracy of pipeline deformation monitoring, enables real-time identification of pipeline deformation, avoids the failure of traditional methods in monitoring curved pipelines, and ensures construction safety.
Smart Images
Figure CN120593671B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of metering equipment technology characterized by the use of sound waves, and specifically to a method, device and system for monitoring pipeline deformation during pipe jacking construction. Background Technology
[0002] Pipe jacking is an important method for laying underground pipelines in pipeline engineering. It has advantages such as trenchless laying, cost savings, and reduced pollution. By placing and splicing pipe sections together, and then gradually pushing them in with jacks at the pipe openings, pipeline laying can be completed quickly. However, pipelines are prone to deformation under uneven stress, posing a significant threat to construction safety and even causing serious hazards such as ground deformation. Therefore, it is necessary to effectively monitor pipeline deformation during construction to prevent problems from escalating.
[0003] Existing problems: Current pipeline deformation monitoring mostly uses laser theodolites to monitor deformation parameters based on the difference in the laser's landing point. However, this monitoring method is only effective for monitoring large-scale pipeline deformation, and it will fail when the pipeline is bent during design and construction. As a result, pipeline deformation is still judged manually, resulting in low accuracy of deformation monitoring. Summary of the Invention
[0004] This invention provides a method, device, and system for monitoring pipeline deformation during pipe jacking construction, in order to solve existing problems.
[0005] The present invention provides a pipeline deformation monitoring method, device, and system for pipe jacking construction, which adopts the following technical solution:
[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 jacking speed of the pipe at each moment is obtained, and several monitoring points are set at equal intervals on the pipe. From the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point at each moment is obtained.
[0008] Starting from each monitoring point entering the soil layer, a window is formed by a series of 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 it at all moments within the same numbered window, the reference time period corresponding to each monitoring point before it is determined.
[0009] 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 time period corresponding to each monitoring point before each monitoring point, the degree of deformation of the pipeline position at the current moment is determined.
[0010] Based on the degree of deformation of the pipeline where each monitoring point is located at the current moment, it is determined that the pipeline where each monitoring point is located has deformed at the current moment.
[0011] Furthermore, the specific steps for determining the reference time period corresponding to each monitoring point before each monitoring point are as follows:
[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 it is in at the current time is denoted as the q-th window;
[0014] The difference in penetration depth between the i-th monitoring point and the j-th historical monitoring point is determined based on the difference in penetration velocity at all times during the time period from the first window to the q-th window corresponding to the i-th monitoring point and the j-th historical monitoring point.
[0015] Based on the difference in penetration depth between the i-th monitoring point and the j-th historical monitoring point, the expansion radius r between the i-th monitoring point and the j-th historical monitoring point is determined.
[0016] The time period between the qr-th window and the q+r-th window corresponding to the j-th historical monitoring point is denoted as the reference time period corresponding to the j-th historical monitoring point.
[0017] Furthermore, the specific steps for determining the difference in penetration depth between the i-th monitoring point and the j-th historical monitoring point are as follows:
[0018] During the time interval between the first window and the qth window corresponding to the i-th monitoring point, the average of the jacking velocities at all times is taken as the current average jacking velocities of the i-th monitoring point.
[0019] During the time period from the first window to the qth window corresponding to the j-th historical monitoring point, the average of the jacking velocities at all times is used as the reference average jacking velocities for the j-th historical monitoring point.
[0020] The normalized value of the absolute value of the difference between the current average jacking velocity of the i-th monitoring point and the reference average jacking velocity of the j-th historical monitoring point is calculated as the difference in jacking depth between the i-th monitoring point and the j-th historical monitoring point.
[0021] Furthermore, the specific steps for determining the expansion radius of the i-th monitoring point and the j-th historical monitoring point are as follows:
[0022] 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, rounded up, is used as the expansion radius between the i-th monitoring point and the j-th historical monitoring point.
[0023] Furthermore, the specific steps for determining the degree of deformation of the pipeline at the current moment for each monitoring point are as follows:
[0024] Based on the ultrasonic signals at all times within the q-th window corresponding to the i-th monitoring point and the ultrasonic signals at all times within the reference time period corresponding to the j-th historical monitoring point, determine the current difference between the i-th monitoring point and the j-th historical monitoring point;
[0025] Based on the current differences between the i-th monitoring point and all historical monitoring points, determine the degree of deformation of the pipeline location at the current moment.
[0026] Furthermore, the specific steps for determining the current difference between the i-th monitoring point and the j-th historical monitoring point are as follows:
[0027] The sequence of ultrasound signals at all times within the q-th window corresponding to the i-th monitoring point is denoted as the first sequence. The sequence of ultrasound signals at all times within the reference time period corresponding to the j-th historical monitoring point is denoted as the second sequence. The DTW algorithm is used to obtain the DTW distance between the first sequence and the second sequence, which is used as the current difference between the i-th monitoring point and the j-th historical monitoring point.
[0028] Furthermore, the specific steps for determining the degree of deformation of the pipeline at the current moment at the location of the i-th monitoring point are as follows:
[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 take the normalized value of the product of the sum and the current difference between the i-th monitoring point and the last historical monitoring point as the degree of deformation of the pipeline position of the i-th monitoring point at the current moment.
[0030] Furthermore, the specific steps for determining whether the pipeline position of each monitoring point has deformed at the current moment include the following:
[0031] Among the monitoring points that have entered the soil layer before the current moment, if the deformation of the pipeline position where the i-th monitoring point is located at the current moment is greater than the preset judgment threshold, it is determined that the pipeline position where the i-th monitoring point is located at the current moment has deformed.
[0032] A pipeline deformation monitoring device for pipe jacking construction, employing the aforementioned pipeline deformation monitoring method for pipe jacking construction, comprises the following modules:
[0033] Pipe jacking construction data acquisition module: used to acquire the jacking speed of the pipe at every moment during the pipe jacking construction process, and to set up several monitoring points at equal intervals on the pipe, and to acquire the ultrasonic signal of each monitoring point at every moment from the moment each monitoring point enters the soil layer;
[0034] Reference time period determination module: It is used to form several windows by sequentially and non-repeatingly taking several consecutive moments starting from each monitoring point entering the soil layer; and to determine the reference time period corresponding to each monitoring point before each monitoring point based on the difference in jacking speed between each monitoring point and each monitoring point before each monitoring point in all moments within the same numbered window.
[0035] Deformation degree analysis module: 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 time period corresponding to each monitoring point before each monitoring point, the deformation degree of the pipeline position at the current moment is determined.
[0036] Pipeline deformation judgment module: Based on the degree of deformation of the pipeline position of each monitoring point at the current moment, it determines that the pipeline position of each monitoring point has deformed at the current moment.
[0037] The present invention also proposes a pipeline deformation monitoring system for pipe jacking construction, including 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 this embodiment of the invention, during pipe jacking construction, the jacking speed of the pipe is acquired at each moment, and several monitoring points are set at equal intervals on the pipe. Starting from the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point is acquired at each moment. Based on the difference in jacking speed after each monitoring point enters the soil layer, a reference time period corresponding to each monitoring point before each monitoring point is determined. This determines the time period when previous monitoring points passed through the same soil layer position, 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 previous monitoring point within the corresponding reference time period, the degree of deformation of the pipe position at each monitoring point at the current moment is determined. This is based on the reason why pipe deformation causes soil layer changes, thus leading to changes in ultrasonic signals. By comparing the ultrasonic signals of the current monitoring point with those of historical monitoring points when passing through the same soil layer position, the degree of deformation is determined, ensuring the accuracy of pipe deformation analysis and thus determining whether deformation has occurred at the pipe position of each monitoring point at the current moment. This invention analyzes the differences in ultrasonic signals at different monitoring points when passing through the same soil layer to determine whether the pipeline at the monitoring point has deformed. This improves the accuracy of pipeline deformation monitoring during pipe jacking construction, effectively solves the shortcomings of traditional laser theodolite monitoring, and avoids the problem of deformation monitoring failure caused by bending of the pipeline during construction. Attached Figure Description
[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0041] Figure 1 This is a flowchart illustrating the steps of a pipeline deformation monitoring method for pipe jacking construction according to the present invention.
[0042] Figure 2 This is a flowchart 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 This is a schematic diagram showing the change in the jacking velocity of the pipe over time.
[0045] Figure 5 A schematic diagram showing the change of ultrasonic signal over time for each monitoring point. Detailed Implementation
[0046] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a pipeline deformation monitoring method, device, and system for pipe jacking construction proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.
[0047] Unless otherwise defined, 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 pertains.
[0048] The following description, in conjunction with the accompanying drawings, details a specific scheme for a pipeline deformation monitoring method, device, and system for pipe jacking construction provided by the present invention.
[0049] Please see Figure 1 The diagram illustrates a flowchart of a pipeline deformation monitoring method for pipe jacking construction according to an embodiment of the present invention. The method includes the following steps:
[0050] Step S001: During the pipe jacking construction, the jacking speed of the pipe 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, the ultrasonic signal of each monitoring point at each moment is obtained.
[0051] During the pipe jacking construction process, the jacking speed of the pipe at every moment is collected, and several monitoring points are set at equal intervals on the pipe. From the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point at every moment is collected.
[0052] It should be noted that the specific process of pipe jacking construction is as follows: A vertical shaft is excavated at both the starting and ending points, serving as the working shaft and receiving shaft, respectively. In the working shaft, the jacking machine head is connected to the front end of the pipe. Starting from the jacking opening, jacks are used to push the pipe section by section into the soil layer along the jacking direction. After each section of pipe is jacked in, a new section of pipe needs to be connected at the jacking opening, and jacking continues until the receiving shaft is reached, completing the jacking operation. In this embodiment, a velocity sensor is used to collect the jacking velocity of the pipe, and an ultrasonic sensor is installed at each monitoring point to collect the ultrasonic signal after the pipe enters the soil layer. The monitoring points are set at equal intervals of one pipe section. An ultrasonic sensor is installed in the middle of the pipe. The data collection frequency is once per second. This is used as an example for description. A schematic diagram of the ultrasonic sensor installation during pipe jacking construction is shown below. Figure 3 As shown.
[0053] Step S002: Starting from each monitoring point entering the soil layer, a window is formed by a series of consecutive moments, and several windows are formed without repetition; based on the difference in jacking speed between each monitoring point and each monitoring point before it at all moments within the same numbered window, the reference time period corresponding to each monitoring point before it is determined.
[0054] During pipe jacking construction, the pipeline is pushed into the designed channel in stages using jacks. If the jacking speed and force are not matched to the actual situation, it can easily lead to local deformation of the pipeline. 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 changes in the density of the soil and gravel at the deformed location. Therefore, the density of the soil and gravel on the outer surface is obtained by an internally installed ultrasonic sensor. The greater the change in density, the higher the possibility of deformation and the greater the degree of deformation.
[0055] After the first ultrasonic sensor is installed and reaches a preset insertion depth, the second ultrasonic sensor is installed. As the second ultrasonic sensor gradually enters the channel, the degree of deformation is obtained by comparing the ultrasonic signal with that of the first ultrasonic sensor at the same location in the channel. This allows for real-time determination of whether deformation has occurred in the insertion section between the first and second ultrasonic sensors. Subsequently, a third ultrasonic sensor is installed, and the deformation degree of the pipeline section between the second and third ultrasonic sensors is obtained in real-time by comparing the signal with previous signals. This process is repeated to obtain the real-time deformation degree at various locations throughout the entire pipeline.
[0056] One important consideration is that pipeline alignment operations may occur, causing changes in the jacking speed. These changes in jacking speed will affect the soil density location corresponding to the ultrasonic signals. Therefore, it is necessary to first align the ultrasonic signals based on the changes in jacking speed, i.e., obtain different ultrasonic sensor signals at the same jacking depth. Secondly, the degree of local deformation should be obtained based on the differences in ultrasonic sensor signals from different sensors. Finally, the locations where deformation has occurred should be identified.
[0057] In monitoring pipeline deformation, this embodiment obtains deformation data by comparing the ultrasonic signals from subsequent ultrasonic sensors with those from previous sensors, thus identifying pipeline deformation. The ultrasonic sensors enter the construction channel after the jacking head. During gradual jacking, the jacking speed changes due to adjustments and other operations, resulting in differences in the external pipeline jacking position represented by the same location in the signals acquired by different ultrasonic sensors. For example, if the jacking speed is slower after the first ultrasonic sensor is installed, but faster after the second ultrasonic sensor is installed, then the sensor with the faster jacking speed will be located at a deeper jacking depth in the two signals of the same duration.
[0058] Preferably, in one embodiment of the present invention, the method for obtaining the reference time period corresponding to each historical monitoring point includes:
[0059] The preset time threshold n is 5, and this will be used as an example for explanation.
[0060] Starting from each monitoring point entering the soil layer, a window is formed by consecutive n time points, and several windows are formed without repetition. In this way, several windows corresponding to each monitoring point are obtained.
[0061] For example: if the second monitoring point begins entering the soil layer at time n, then the time period from time n to time n+4 is the first window; the time period from time n+5 to time n+9 is the second window; if the current time is time n+12, then the time period from time n+10 to the current time is the third window, and so on until the current time is time n+14 (inclusive). This results in several windows corresponding to the second monitoring point. Similarly, if the third monitoring point begins entering the soil layer at time m, then the time 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 jacking velocity remains constant, the soil locations represented by the ultrasonic signals from the same sequence window at different monitoring points are the same. A schematic diagram of the pipe jacking velocity versus time is shown below. Figure 4 As shown. Figure 4 In the coordinate system, the horizontal axis represents time, and the vertical axis represents the jacking velocity. The times corresponding to the dashed lines 1, 2, and 3 on the horizontal axis represent the start times of the first, second, and third monitoring points entering the soil layer, respectively. The two time periods corresponding to the k-th window represent the k-th windows corresponding to the first and second monitoring points, respectively. A schematic diagram of the ultrasonic signal variation over time for each monitoring point is shown below. Figure 5 As shown. Figure 5 In the coordinate system, the horizontal axis represents time, and the vertical axis represents the ultrasonic signal. This is a time-domain waveform diagram of the ultrasonic signal, showing the amplitude of the ultrasonic signal change over time. The times corresponding to the dashed lines 1 and 2 on the horizontal axis represent the start time of the first and second monitoring points entering the soil layer, respectively. The two time periods corresponding to the k-th window represent the k-th window corresponding to the first and second monitoring points, respectively. Among them, the long solid line starting from the time corresponding to the dashed line 1 on the horizontal axis at the top is the time-domain waveform diagram of the ultrasonic signal corresponding to the first monitoring point, and the short solid line starting from the time corresponding to the dashed line 2 on the horizontal axis at the bottom is the time-domain waveform diagram of the ultrasonic signal corresponding to the second monitoring point.
[0063] Therefore, the proportional length of the ultrasonic signals of adjacent ultrasonic sensors can be determined based on the curve of the jacking speed changing over time. This is because the jacking speed needs to be reduced during pipeline correction and other operations to ensure the quality of jacking. The faster the jacking speed, the greater the actual jacking distance of the pipeline represented by the ultrasonic signal in a single window. For ultrasonic signals in the same window sequence, the ultrasonic sensor signal with a larger jacking distance corresponds to more soil layer positions within its window. Other ultrasonic sensor signal curves with smaller jacking distances require ultrasonic signals over a longer period to correspond to the same soil layer position. Since the ultrasonic signals in the same window sequence are generated at the same time, the difference in jacking distance is directly 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 the description is based on this example.
[0066] For the i-th monitoring point, the window it is in at the current time is denoted as the q-th window.
[0067] During the time interval between the first window and the qth window corresponding to the i-th monitoring point (inclusive of the first and qth windows), the average of the infeed velocities at all times is taken as the current average infeed velocity of the i-th monitoring point.
[0068] Taking the j-th historical monitoring point as an example, during the time period between the 1st window and the q-th window corresponding to the j-th historical monitoring point (inclusive of the 1st window and the q-th window), the average of the jacking speed at all times is used as the reference average jacking speed of the j-th historical monitoring point.
[0069] Calculate the normalized value of the absolute value of the difference between the current average jacking velocity at the i-th monitoring point and the reference average jacking velocity at the j-th historical monitoring point, and use it as the difference in jacking depth 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 mentioned above, in this embodiment, uses the norm() linear normalization function to normalize the absolute value of the difference to between 0 and 1.
[0071] The preset quantity threshold is 10, and this will be used as an example for explanation.
[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 quantity threshold is rounded up and used as the expansion radius r between the i-th monitoring point and the j-th historical monitoring point.
[0073] The time period between the qr-th window and the q+r-th window corresponding to the j-th historical monitoring point (including the 1st window and the q-th window) is denoted as the reference time period corresponding to the j-th historical monitoring point.
[0074] It should be noted that: for the j-th historical monitoring point, the current window is denoted as the p-th window. When qr < 1, qr = 1; when q + r > p, q + r = p. This ensures that the reference time period corresponding to the j-th historical monitoring point is within the time period from the start of the j-th historical monitoring point entering the soil layer to the current time. When the difference in penetration depth between the i-th monitoring point and the j-th historical monitoring point is large, a larger r is assigned, thus ensuring that within the reference time period corresponding to the j-th historical monitoring point, the soil layer position traversed by the j-th historical monitoring point includes the soil layer position traversed by the i-th monitoring point within the q-th window.
[0075] Using the method described above, obtain the reference time period corresponding to each historical monitoring point.
[0076] Step S003: 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 time period corresponding to each monitoring point before each monitoring point, determine the degree of deformation of the pipeline position at the current moment.
[0077] If pipeline deformation occurs at the current location of the i-th monitoring point, it will cause changes in the soil structure at that location. This will result 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 was normal when it passed through this location, the greater the difference in ultrasonic signal between the i-th monitoring point and the (i-1)-th monitoring point when it passed through the current location, and the smaller the difference in ultrasonic signal between all historical monitoring points when they passed through the current location, the higher the degree of deformation at the current location of the i-th monitoring point.
[0078] Preferably, in one embodiment of the present invention, the method for obtaining the degree of deformation of the pipeline at the current moment of the i-th monitoring point includes:
[0079] The sequence of ultrasound signals at all times within the q-th window corresponding to the i-th monitoring point is denoted as the first sequence. The sequence of ultrasound signals at all times within the reference time period corresponding to the j-th historical monitoring point is denoted as the second sequence. The DTW algorithm is used to obtain the DTW distance between the first sequence and the second sequence, which is used 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 its specific method will not be described here. The smaller the DTW distance, the more similar the two sequences are.
[0081] Using the method described above, obtain the current difference between the i-th monitoring point and each historical monitoring point.
[0082] The default constant is 1, and this will be used as an example for explanation.
[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 this variance and a preset constant. The normalized value of the product of this sum and the current difference between the i-th monitoring point and the last historical monitoring point is taken as the degree of deformation of the pipeline position of the i-th monitoring point at the current moment.
[0084] It should be noted that this embodiment uses exp(-V) to represent the inverse proportional relationship of V and the normalization process. Implementers can set the inverse proportional function and normalization function according to the actual situation. exp() is an exponential function with the natural constant as the base. The normalized value of the above product is normalized using the norm() linear normalization function in this embodiment, which normalizes the product to between 0 and 1. The last historical monitoring point is the (i-1)th monitoring point. If there is only one historical monitoring point, the variance V cannot be calculated. In this embodiment, a preset constant 1 is used as the sum of the inverse proportional normalized value of V and the preset constant, and this is used as an example for description. The greater the difference between the current value of the i-th monitoring point and the last historical monitoring point, the greater the difference in the ultrasonic signal between the i-th monitoring point and the (i-1)-th monitoring point when passing through the same soil layer, and the greater the deformation of the pipeline position at the i-th monitoring point 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. In other words, the ultrasonic information of all historical monitoring points at the current time of the i-th monitoring point's location in the soil layer is similar, meaning that the pipeline locations of the historical monitoring points are all normal. Therefore, the current difference between the i-th monitoring point and the last historical monitoring point is more reliable. Thus, the variance is adjusted inversely.
[0085] Step S004: Based on the degree of deformation of the pipeline position where each monitoring point is located at the current moment, determine that the pipeline position where each monitoring point is located at the current moment has deformed.
[0086] Preferably, in one embodiment of the present invention, the method for determining whether deformation has occurred at the location of the i-th monitoring point in the pipeline at the current moment includes:
[0087] The preset judgment threshold is 0.43, and this will be used as an example for explanation.
[0088] When the deformation of the pipeline where the i-th monitoring point is located at the current moment is greater than the preset judgment threshold, it is determined that the pipeline where the i-th monitoring point is located at the current moment has deformed.
[0089] Following the above method, among the monitoring points that have entered the soil layer before the current moment, it is determined whether the pipeline position at each monitoring point has deformed at the current moment. This completes the deformation monitoring of the pipeline position at each monitoring point that has entered the soil layer at the current moment. The deformation monitoring result of the pipeline position at the second monitoring point is also used to represent the deformation monitoring result of the pipeline position 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 deformation degree at each subsequent ultrasonic sensor's location within the pipeline is calculated in real time, thus obtaining the deformation at various locations throughout the overall pipeline construction process. When deformation occurs at any monitoring point at any given time, an early warning device issues a warning, interrupts the jacking process, and initiates relevant emergency procedures.
[0091] Secondly, please refer to Figure 2 , Figure 2 This is a flowchart illustrating the modules of a pipeline deformation monitoring device for pipe jacking construction according to the present invention. It shows an embodiment of the present invention, which includes the following modules:
[0092] Pipe jacking construction data acquisition module: used to acquire the jacking speed of the pipe at every moment during the pipe jacking construction process, and to set up several monitoring points at equal intervals on the pipe, and to acquire the ultrasonic signal of each monitoring point at every moment from the moment each monitoring point enters the soil layer;
[0093] Reference time period determination module: It is used to form several windows by sequentially and non-repeatingly taking several consecutive moments starting from each monitoring point entering the soil layer; and to determine the reference time period corresponding to each monitoring point before each monitoring point based on the difference in jacking speed between each monitoring point and each monitoring point before each monitoring point in all moments within the same numbered window.
[0094] Deformation degree analysis module: 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 time period corresponding to each monitoring point before each monitoring point, the deformation degree of the pipeline position at the current moment is determined.
[0095] Pipeline deformation judgment module: Based on the degree of deformation of the pipeline position of each monitoring point at the current moment, it determines that the pipeline position of each monitoring point has deformed at the current moment.
[0096] Thirdly, the present invention also provides a pipeline deformation monitoring system for pipe jacking construction, including 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.
[0097] This invention is now complete.
[0098] In summary, in this embodiment of the invention, during pipe jacking construction, the jacking speed of the pipeline at each moment is acquired, and several monitoring points are set at equal intervals on the pipeline. Starting from the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point at each moment is acquired. Based on the difference in jacking speed after each monitoring point enters the soil layer, a reference time period corresponding to each monitoring point before that monitoring point is determined. Based on the difference between the ultrasonic signal of each monitoring point and the ultrasonic signal of each monitoring point within the reference time period corresponding to each previous monitoring point, the degree of deformation of the pipeline at the current moment is determined, thereby judging whether deformation has occurred at the pipeline position of each monitoring point at the current moment. This invention improves the accuracy of pipeline deformation monitoring during pipe jacking construction by analyzing the differences in ultrasonic signals of different monitoring points when passing through the same soil layer position to determine whether pipeline deformation has occurred at the monitoring point.
[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 within the protection scope of the present invention.
Claims
1. A method for monitoring pipeline deformation during pipe jacking construction, characterized in that, The method includes the following steps: During the pipe jacking construction process, the jacking speed of the pipe at each moment is obtained, and several monitoring points are set at equal intervals on the pipe. From the moment each monitoring point enters the soil layer, the ultrasonic signal of each monitoring point at each moment is obtained. Starting from each monitoring point entering the soil layer, a window is formed by a series of 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 it at all moments within the same numbered window, the reference time period corresponding to each monitoring point before it is determined. 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 time period corresponding to each monitoring point before each monitoring point, the degree of deformation of the pipeline position at the current moment is determined. Based on the degree of deformation of the pipeline where each monitoring point is located at the current moment, it is determined that the pipeline where each monitoring point is located has deformed at the current moment; The specific steps for determining the reference time period corresponding to each monitoring point before each monitoring point are as follows: The monitoring points that had already entered the soil layer before the current moment will be the first... The monitoring points prior to this monitoring point are recorded as historical monitoring points; For the The monitoring point will record the current window as the [number]th [time]. One window; According to the The monitoring point and the first The first window corresponding to each historical monitoring point to the second window The difference in push-in velocity at all times within the time interval between windows determines the first... The monitoring point and the first Differences in jacking depth at historical monitoring points; According to the first The monitoring point and the first The difference in penetration depth at each historical monitoring point determines the first The monitoring point and the first The expansion radius of each historical monitoring point ; The first The first historical monitoring point corresponding to the The window to the first The time interval between windows is denoted as the nth window. The reference time period corresponding to each historical monitoring point.
2. The pipeline deformation monitoring method for pipe jacking construction according to claim 1, characterized in that, The determination of the first The monitoring point and the first The differences in jacking depth at historical monitoring points include the following specific steps: In the The first window corresponding to each monitoring point to the second window Within the time interval between windows, the average of the push-in velocity at all times is taken as the first window. The current average jacking speed at each monitoring point; In the The first window corresponding to each historical monitoring point to the second window Within the time interval between windows, the average of the push-in velocity at all times is taken as the first window. The reference average jacking speed at each historical monitoring point; Calculate the first The current average jacking speed at the monitoring point and the first The normalized value of the absolute value of the difference between the reference average jacking velocity at each historical monitoring point is used as the first... The monitoring point and the first Differences in jacking depth at historical monitoring points.
3. The pipeline deformation monitoring method for pipe jacking construction according to claim 1, characterized in that, The determination of the first The monitoring point and the first The specific steps involved in expanding the radius of each historical monitoring point are as follows: The first The monitoring point and the first The rounded-up value of the product of the difference in penetration depth of each historical monitoring point and a preset quantity threshold is used as the first... The monitoring point and the first The radius of expansion of each historical monitoring point.
4. The pipeline deformation monitoring method for pipe jacking construction according to claim 1, characterized in that, The specific steps for determining the degree of deformation of the pipeline at each monitoring point at the current moment are as follows: According to the The first monitoring point corresponding to the The ultrasound signals at all times within the window and the first The ultrasonic signals at all times within the reference time period corresponding to the historical monitoring point are used to determine the number of historical monitoring points. The monitoring point and the first Current differences among historical monitoring points; According to the The current differences between the current monitoring point and all historical monitoring points are used to determine the first monitoring point. The degree of deformation of the pipeline at the current moment at the location of each monitoring point.
5. The pipeline deformation monitoring method for pipe jacking construction according to claim 4, characterized in that, The determination of the first The monitoring point and the first The specific steps involved in determining the current differences among historical monitoring points are as follows: The first The first monitoring point corresponding to the The sequence of ultrasound signals at all times within a window is denoted as the first sequence. The sequence consisting of ultrasound signals from all times within the reference time period corresponding to each historical monitoring point is denoted as the second sequence. The DTW algorithm is used to obtain the DTW distance between the first sequence and the second sequence, which is then used as the second sequence. The monitoring point and the first Current differences among historical monitoring points.
6. The pipeline deformation monitoring method for pipe jacking construction according to claim 4, characterized in that, The determination of the first The specific steps involved in determining the degree of deformation of the pipeline at each monitoring point at the current moment are as follows: Calculate the first The variance of the current difference between a monitoring point and all historical monitoring points is calculated, and then the sum of the inversely proportional normalized value of the variance and a preset constant is calculated. This sum is then compared with the variance of the first monitoring point. The normalized value of the product of the current differences between the current monitoring point and the last historical monitoring point is used as the first... The degree of deformation of the pipeline at the current moment at the location of each monitoring point.
7. The pipeline deformation monitoring method for pipe jacking construction according to claim 1, characterized in that, The specific steps involved in determining whether deformation has occurred at the pipeline location of each monitoring point at the current moment are as follows: Among the monitoring points that had entered the soil layer before the current moment, when the first If the deformation of the pipeline at the location of a monitoring point exceeds a preset threshold at the current moment, then the current moment is determined to be the first... Deformation was observed at the location of the monitoring point on the pipeline.
8. A pipeline deformation monitoring device for pipe jacking construction, employing a pipeline deformation monitoring method for pipe jacking construction as described in any one of claims 1-7, characterized in that, The device includes the following modules: Pipe jacking construction data acquisition module: used to acquire the jacking speed of the pipe at every moment during the pipe jacking construction process, and to set up several monitoring points at equal intervals on the pipe, and to acquire the ultrasonic signal of each monitoring point at every moment from the moment each monitoring point enters the soil layer; Reference time period determination module: It is used to form several windows by sequentially and non-repeatingly taking several consecutive moments starting from each monitoring point entering the soil layer; and to determine the reference time period corresponding to each monitoring point before each monitoring point based on the difference in jacking speed between each monitoring point and each monitoring point before each monitoring point in all moments within the same numbered window. Deformation degree analysis module: 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 time period corresponding to each monitoring point before each monitoring point, the deformation degree of the pipeline position at the current moment is determined. Pipeline deformation judgment module: Based on the degree of deformation of the pipeline position of each monitoring point at the current moment, it determines that the pipeline position of each monitoring point has deformed at the current moment.
9. 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 the processor, it implements the steps of a pipeline deformation monitoring method for pipe jacking construction as described in any one of claims 1-7.
Citation Information
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