Pipe deformation monitoring apparatus and method

Abstract

This invention relates to a pipeline deformation monitoring device and method. Existing monitoring methods suffer from problems such as the need for excavation and point placement, high implementation difficulty, and large measurement errors. This invention places a tensioning device connected to an array of flexible three-dimensional deformation sensors into an upstream pipeline maintenance manhole; the tensioning device moves with the water flow within the measured pipeline to a downstream pipeline maintenance manhole, bringing the sensors into the measured pipeline; another tensioning device is placed in the downstream pipeline maintenance manhole and connected to the other end of the array of flexible three-dimensional deformation sensors; both tensioning devices are activated, tauting the array of flexible three-dimensional deformation sensors and ensuring they are tightly attached to the bottom of the measured pipeline; the array of flexible three-dimensional deformation sensors are used to measure the angle between the corresponding axis of the pipeline and the direction of gravity. This invention directly measures pipeline deformation by placing the measuring device inside the pipeline, eliminating the need for excavating manholes and placing clamps above the pipeline, avoiding measurement errors caused by manual measurement and inaccurate point placement, resulting in reliable measurement results.

Description

Technical Field

[0001] This invention relates to the field of urban rail transit construction technology, specifically to a pipeline deformation monitoring device and method. Background Technology

[0002] The rapid development of urban infrastructure has led to an increasing number and complexity of underground pipelines. During the construction of urban rail transit, tunnel boring machines (TBMs) and foundation pit excavation can affect surrounding structures and terrain, causing deformation of underground pipelines and impacting operational safety. Therefore, monitoring and controlling the deformation of underground pipelines during TBM and foundation pit excavation is a crucial issue in urban rail transit construction.

[0003] To ensure the safe operation of underground pipelines and the smooth progress of rail transit construction, deformation monitoring of surrounding pipelines is essential during construction to prevent accidents. Currently, two common monitoring methods are the direct and indirect methods. The direct method involves directly excavating and placing monitoring points, using clamps and measuring rods installed on the pipeline to monitor deformation. However, rail transit lines typically run along main urban roads, where excavation is often impossible, making point placement difficult. The indirect method involves drilling holes in manholes above the pipeline and placing measuring rods, measuring the displacement of these rods to obtain pipeline settlement and deformation. However, this method often suffers from significant measurement errors due to the difficulty in accurately locating monitoring points, failing to achieve the intended purpose of pipeline deformation monitoring. Therefore, finding an accurate and operable method for monitoring pipeline deformation is crucial. Summary of the Invention

[0004] The purpose of this invention is to provide a pipeline deformation monitoring device and method to solve the problems of high implementation difficulty and large measurement error in existing methods.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A pipeline deformation monitoring method, the method comprising:

[0007] A tensioning device connected to an array of flexible three-dimensional deformation sensors was placed into the upstream pipeline maintenance well.

[0008] The tensioning device moves with the water flow from the measured pipe to the downstream pipe maintenance well, and brings the array-type flexible three-dimensional deformation sensor into the measured pipe.

[0009] Another tensioning device is installed in the downstream pipeline maintenance well, and the other end of the array-type flexible three-dimensional deformation sensor is connected to the other tensioning device.

[0010] Activate the two tensioning devices, causing the two ends of the array-type flexible three-dimensional deformation sensor to be wound up on the tensioning device fixing pulleys set on the side of the tensioning device, thereby straightening and tightly adhering to the bottom of the pipe being measured;

[0011] The angle θ between the corresponding axis of the pipe and the direction of gravity was measured using an array of flexible three-dimensional deformation sensors.

[0012] Furthermore, the method also includes:

[0013] An array-type flexible three-dimensional deformation sensor is composed of measurement units of the same length connected together. Each measurement unit is equipped with an accelerometer. The accelerometer measures the gravitational acceleration data in different axes to reflect the angle between the corresponding axis and the direction of gravity. The displacement of each segment is calculated by the change of angle.

[0014] Furthermore, the method also includes:

[0015] Positioning sensors are installed on the side walls of the upstream and downstream pipeline maintenance manholes to monitor their horizontal displacement.

[0016] Furthermore, the method also includes:

[0017] Calculate the longitudinal deformation and displacement of the pipeline:

[0018] The deformation Δz in the Z-axis direction of a single measurement unit is:

[0019] Δz=Lsinβ=Lsin;

[0020] in:

[0021] L is the length of a single measurement unit;

[0022] The angle between the axis of the β-pipe and the horizontal direction;

[0023] The Z-axis deformation displacement Z of the entire monitored pipeline section is:

[0024] Z = ∑Lsinβn = ∑Lsinn);

[0025] in:

[0026] n is the number of measurement unit sections.

[0027] Furthermore, the method also includes:

[0028] The position data X1 of the pipeline inspection manhole along the pipeline direction is measured using a positioning sensor. If the original position data of the inspection manhole along the pipeline direction is X0, the displacement data ΔX of the inspection manhole along the pipeline direction is obtained as follows:

[0029] ΔX = X1 - X0;

[0030] This yields the horizontal deformation and displacement data of the underground pipeline along its direction.

[0031] On the other hand, a pipeline deformation monitoring device is provided, the device being used to implement the method, including a tensioning device and an array of flexible three-dimensional deformation sensors;

[0032] The array-type flexible three-dimensional deformation sensor is located at the bottom inside the pipe being measured, and both ends of the array-type flexible three-dimensional deformation sensor are respectively connected to a tensioning device;

[0033] The two tensioning devices are located in the upstream pipeline maintenance well and the downstream pipeline maintenance well of the measured pipeline, respectively.

[0034] Furthermore, a tensioning device fixing pulley is provided on the side of the tensioning device, and the end of the array-type flexible three-dimensional deformation sensor is connected to the tensioning device fixing pulley.

[0035] Furthermore, the device also includes a traction device connected to the side of the tensioning device.

[0036] Furthermore, the device also includes positioning sensors located on the sidewalls of the upstream pipeline maintenance well and the downstream pipeline maintenance well.

[0037] Furthermore, the device also includes a counterweight located inside or on top of the tensioning device.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] (1) The pipeline deformation monitoring method of the present invention directly measures the pipeline deformation by placing measuring equipment inside the pipeline, without the need to excavate manholes and place clamps above the pipeline, thus avoiding the situation where there are no excavation conditions for underground pipelines, improving the operability and convenience of the monitoring project, and reducing the difficulty of implementing underground pipeline deformation monitoring.

[0040] (2) The pipeline deformation monitoring method of the present invention no longer obtains the settlement deformation of the pipeline by manually measuring the displacement of the steel bars buried above the pipeline. Instead, it uses an array of flexible three-dimensional deformation sensors placed at the bottom of the pipeline to measure the pipeline deformation, avoiding measurement errors caused by manual measurement and inaccurate placement of measuring points, and ensuring reliable measurement results. Furthermore, the array of flexible three-dimensional deformation sensors used in this invention can monitor not only the settlement of underground pipelines but also the lateral displacement of the pipelines, with an accuracy down to the millimeter level, resulting in a wider measurement range and higher precision.

[0041] (3) The pipeline deformation monitoring method of the present invention can collect and upload pipeline deformation monitoring data in real time, eliminating the need for manual measurement and data processing, reducing the intensity of monitoring work and improving work efficiency. Moreover, the present invention can use the processing system to display the processed pipeline deformation data in real time, thereby obtaining the true degree and pattern of pipeline deformation, which can be used to guide construction units to take corresponding measures to prevent pipeline operation accidents.

[0042] (4) The pipeline deformation monitoring device of the present invention can be recycled and reused after each pipeline monitoring is completed, which effectively reduces construction costs and reduces material waste. Attached Figure Description

[0043] 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 embodiments can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a diagram showing the device composition of the present invention.

[0045] Figure 2 This is a structural diagram of the tensioning device.

[0046] Figure 3 This is a structural diagram of the manhole cover for maintenance.

[0047] Figure 4 This is a schematic diagram illustrating the calculation of vertical displacement due to settlement of underground pipelines.

[0048] The diagram is labeled as follows:

[0049] 1-Measured pipeline, 2-Pipeline inspection well, 3-Traction device, 4-Tensioning device, 5-Array-type flexible three-dimensional deformation sensor, 6-Inspection well cover, 7-Tensioning device fixing pulley, 8-Positioning sensor. Detailed Implementation

[0050] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0051] In the description of this invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] It should also be noted that although the order of steps is mentioned in the method description, in some cases, steps may be performed in a different order than that described here, and this should not be interpreted as a restriction on the order of steps.

[0054] This invention provides a pipeline deformation monitoring device that directly installs sensors for collecting deformation monitoring data inside the pipeline, enabling reliable deformation monitoring data to be obtained without affecting the pipeline and surrounding structures.

[0055] like Figure 1 The device includes a tensioning device 4 and an array of flexible three-dimensional deformation sensors 5. The array of flexible three-dimensional deformation sensors 5 is installed at the bottom of the pipe being measured 1, and each end of the array of flexible three-dimensional deformation sensors 5 is connected to a tensioning device 4. The tensioning devices 4 are placed in the pipe maintenance manhole 2, with two tensioning devices 4 located in the upstream and downstream pipe maintenance manholes of the pipe being measured 1, respectively, to straighten the array of flexible three-dimensional deformation sensors 5 in the pipe being measured 1.

[0056] The array-type flexible three-dimensional deformation sensor 5 is composed of measurement units of the same length connected together. Each measurement unit is equipped with an accelerometer. The accelerometer measures the data of gravitational acceleration in different axes to return the angle between the corresponding axis and the direction of gravity. The displacement of each segment is calculated by the change of the angle.

[0057] Tensioning device 4 has a tensioning device fixing pulley 7 on its side, and the end of the array-type flexible three-dimensional deformation sensor 5 is connected to the tensioning device fixing pulley 7. When the tensioning device 4 is started (i.e., the motor configured with the tensioning device fixing pulley 7 is started), the end of the array-type flexible three-dimensional deformation sensor 5 is wound up by the tensioning device fixing pulley 7, thereby straightening and tightening the array-type flexible three-dimensional deformation sensor 5, making it fit tightly against the bottom of the measured pipe 1. Since there is usually silt or sediment at the bottom of the pipe, by using the tensioning devices 4 at both ends of the array-type flexible three-dimensional deformation sensor 5 to tighten the array-type flexible three-dimensional deformation sensor 5, while squeezing out the surrounding silt to make it fit tightly against the bottom of the pipe, the deformation displacement of the pipe can be measured directly inside the pipe, and the deformation data of the underground pipeline can be accurately obtained.

[0058] In addition to connecting and winding the array-type flexible three-dimensional deformation sensor 5, the fixed pulley 7 of the tensioning device can also control the position of the fixed pulleys 7 on both sides of the tensioning device to make it fit tightly against the bottom of the pipe.

[0059] In some other embodiments, such as Figure 1 The equipment also includes a traction device 3, which is a traction rope connected to the side of the tensioning device 4. The end of the traction rope can be connected to a floating cylinder. Using the flow of water in the pipeline, the floating cylinder carries the traction rope to the downstream inspection well, where it is then pulled out, thus allowing the traction rope to pass through the monitored pipeline section and fix the traction device to the inspection well cover. Using the positioned traction rope, the tensioning device 4, equipped with an array of flexible three-dimensional deformation sensors 5, is placed upstream and downstream of the monitored pipeline section, with the array of flexible three-dimensional deformation sensors 5 positioned between the two tensioning devices 4.

[0060] The equipment also includes a counterweight, which is located inside or on top of the tensioning device 4. If the tensioning device 4 is lowered from the upstream pipeline inspection well 2, it can move with the water flow within the measured pipeline 1 to the pipeline inspection well 2. At this point, its weight can be added to prevent it from floating. For example, a cover can be installed on the housing of the tensioning device 4, and after opening the cover, a counterweight can be placed inside the housing to increase its weight and cause it to sink. Alternatively, a counterweight can be placed directly on top of the tensioning device 4 to achieve the same purpose of increasing weight and causing it to sink.

[0061] In some other embodiments, such as Figure 3 The device also includes a positioning sensor 8, which is located on the sidewalls of both the upstream and downstream pipeline maintenance manholes. The positioning sensor 8 is used to measure the horizontal displacement of the upstream and downstream pipeline maintenance manholes.

[0062] Data collected by the array-type flexible three-dimensional deformation sensor 5 and the positioning sensor 8 is uploaded to the background monitoring server via a data acquisition system installed on the manhole cover 6. The background monitoring server can display the collected data. In addition, the collected data can also be used to summarize the degree and pattern of pipeline deformation, guiding the construction unit to take corresponding measures to prevent accidents.

[0063] After monitoring is completed, the tensioning device 4 and the array-type flexible three-dimensional deformation sensor 5 are recycled by the traction device 3, so that the monitoring equipment can be reused and the construction cost can be reduced.

[0064] Based on the above equipment, pipeline deformation monitoring can be performed, specifically including the following steps:

[0065] S1: Place a tensioning device 4 connected to an array of flexible three-dimensional deformation sensors 5 into the upstream pipeline maintenance well;

[0066] S2: The tensioning device 4 moves with the water flow from the measured pipe 1 to the downstream pipe maintenance well, and brings the array-type flexible three-dimensional deformation sensor 5 into the measured pipe 1.

[0067] S3: Install another tensioning device 4 in the downstream pipeline maintenance well and connect the other end of the array-type flexible three-dimensional deformation sensor 5 to the other tensioning device 4.

[0068] S4: Activate the two tensioning devices 4, so that the two ends of the array-type flexible three-dimensional deformation sensor 5 are wound up on the tensioning device fixing pulley 7 set on the side of the tensioning device 4, thereby straightening and tightly adhering to the bottom of the measured pipe 1.

[0069] S5: The angle between the corresponding axis of the pipe and the direction of gravity is measured using an array-type flexible three-dimensional deformation sensor 5.

[0070] The array-type flexible three-dimensional deformation sensor 5 is composed of measurement units of the same length connected together. Each measurement unit is equipped with an accelerometer. The accelerometer measures the data of gravitational acceleration in different axes to reflect the angle between the corresponding axis and the direction of gravity. The displacement of each segment is calculated by the change of angle.

[0071] S6: Positioning sensors 8 are installed on the side walls of the upstream pipeline maintenance well and the downstream pipeline maintenance well to monitor the horizontal displacement of the upstream and downstream pipeline maintenance wells.

[0072] S7: Calculate the vertical deformation data of the measured pipe 1 along the pipe direction:

[0073] like Figure 3As shown, taking a single measurement unit of an array-type flexible three-dimensional deformation sensor as an example, the length of a single measurement unit is L. If the measurement unit of the array-type flexible three-dimensional deformation sensor deforms with the X-axis as the axis.

[0074] The deformation Δz in the Z-axis direction of a single measurement unit is:

[0075] Δz = Lsinβ = Lsin(90-θ);

[0076] in:

[0077] L is the length of a single measurement unit;

[0078] The angle between the axis of the β-pipe and the horizontal direction;

[0079] The Z-axis deformation displacement Z of the entire monitored pipeline section is:

[0080] Z=∑Lsinβn=∑Lsin((90-θ)n);

[0081] in:

[0082] n is the number of measurement unit sections.

[0083] S8: Calculate the horizontal deformation data of the measured pipe 1 along the pipe direction:

[0084] Using the positioning sensor 8, the position data X1 of the pipeline inspection manhole along the pipeline direction is measured. If the original position data of the inspection manhole along the pipeline direction is X0, the displacement data of the inspection manhole along the pipeline direction is obtained as ΔX = X1 - X0, that is, the horizontal deformation displacement data of the underground pipeline along the pipeline direction is obtained as ΔX = X1 - X0.

[0085] like Figure 4 As shown, taking point A at the bottom of the pipe as an example, the vertical deformation angle α of point A is measured by an array of flexible three-dimensional deformation sensors 5. Based on the pipe section length △L, the vertical deformation value of the pipe can be calculated using the formula △d=sinα△L.

[0086] The array-type flexible three-dimensional deformation sensor 5 and the positioning sensor 8 can respectively acquire the vertical deformation data and horizontal deformation data of the pipeline, thereby realizing the purpose of 3D monitoring of pipeline deformation.

[0087] Example:

[0088] Assuming the length of a single measuring unit in the array-type flexible three-dimensional deformation sensor is 27.5 mm, and the angle between the measuring unit and the direction of gravity is measured to be 88°, then the deformation of the measuring unit in the Z-axis direction Δz = 27.5 × sin(90 - 88) = 0.96 mm

[0089] Following this method, the deformation in the Z-axis direction of each measuring unit is calculated sequentially, ultimately yielding the longitudinal deformation value of the entire measuring pipe section. After processing by the system, the longitudinal deformation data of the pipeline is displayed in real time. Figure 4 The diagram shows the data curves of the longitudinal deformation of the underground pipeline before and after the water flow direction, as well as the change values.

[0090] The method of the present invention uses a tensioning device extending from the inspection well to make the array of flexible three-dimensional deformation sensors fit tightly against the bottom of the measured pipeline 1. The array of flexible three-dimensional deformation sensors and the positioning sensors installed on the wall of the inspection well measure and upload pipeline deformation displacement data in real time. This allows pipeline deformation monitoring to be carried out even when there are no excavation conditions on site and monitoring points cannot be set up during shield tunneling and foundation pit excavation construction, while ensuring the accuracy and effectiveness of the measurement data.

[0091] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A method for monitoring pipeline deformation, characterized in that: The method includes: A tensioning device (4) connected with an array of flexible three-dimensional deformation sensors (5) is placed into the upstream pipeline maintenance well; The tensioning device (4) moves with the water flow in the measured pipe (1) to the downstream pipe maintenance well and brings the array-type flexible three-dimensional deformation sensor (5) into the measured pipe (1). Another tensioning device (4) is installed in the downstream pipeline maintenance well, and the other end of the array-type flexible three-dimensional deformation sensor (5) is connected to the other tensioning device (4); Start the two tensioning devices (4) and roll up the two ends of the array-type flexible three-dimensional deformation sensor (5) on the tensioning device fixing pulley (7) set on the side of the tensioning device (4) so ​​that it is straightened and tightly attached to the bottom of the pipe (1) being measured; The angle between the corresponding axis of the pipe and the direction of gravity was measured using an array-type flexible three-dimensional deformation sensor (5).

2. The pipeline deformation monitoring method according to claim 1, characterized in that: The method further includes: The array-type flexible three-dimensional deformation sensor (5) is composed of measurement units of the same length connected together. Each measurement unit is equipped with an accelerometer. The accelerometer measures the data of gravitational acceleration in different axes to reflect the angle between the corresponding axis and the direction of gravity. The displacement of each section is calculated by the change of angle.

3. The pipeline deformation monitoring method according to claim 2, characterized in that: The method further includes: Positioning sensors (8) are installed on the side walls of the upstream pipeline maintenance well and the downstream pipeline maintenance well to monitor the horizontal displacement of the upstream and downstream pipeline maintenance wells.

4. The pipeline deformation monitoring method according to claim 3, characterized in that: The method further includes: Calculate the longitudinal deformation and displacement of the pipeline: The deformation Δz in the Z-axis direction of a single measurement unit is: Δz = Lsinβ = Lsin(90-θ) in: L is the length of a single measurement unit; β is the angle between the corresponding axis of the pipe and the horizontal direction; The Z-axis deformation displacement Z of the entire monitored pipeline section is: Z=∑Lsinβn=∑Lsin((90-θ)n); in: n is the number of measurement unit sections.

5. The pipeline deformation monitoring method according to claim 4, characterized in that: The method further includes: Using the positioning sensor (8), the position data X1 of the pipeline maintenance manhole along the pipeline direction is measured. If the original position data of the maintenance manhole along the pipeline direction is X0, the displacement data ΔX of the maintenance manhole along the pipeline direction is obtained as follows: ΔX = X1 - X0; This yields the horizontal deformation and displacement data of the underground pipeline along its direction.

6. Pipeline deformation monitoring equipment, characterized in that: The device is used to implement the method of claim 5, including a tensioning device (4) and an array of flexible three-dimensional deformation sensors (5). The array-type flexible three-dimensional deformation sensor (5) is located at the bottom inside the pipe (1) being measured, and both ends of the array-type flexible three-dimensional deformation sensor (5) are respectively connected to a tensioning device (4). The two tensioning devices (4) are located in the upstream pipeline maintenance well and the downstream pipeline maintenance well of the measured pipeline (1), respectively.

7. The pipeline deformation monitoring device according to claim 6, characterized in that: The tensioning device (4) is provided with a tensioning device fixing pulley (7) on its side, and the end of the array-type flexible three-dimensional deformation sensor (5) is connected to the tensioning device fixing pulley (7).

8. The pipeline deformation monitoring device according to claim 7, characterized in that: The device also includes a traction device (3) which is connected to the side of the tensioning device (4).

9. The pipeline deformation monitoring device according to claim 8, characterized in that: The device also includes a positioning sensor (8), which is located on the side wall inside the upstream pipeline maintenance well and the side wall inside the downstream pipeline maintenance well.

10. The pipeline deformation monitoring device according to claim 9, characterized in that: The device also includes a counterweight, which is located inside or on top of the tensioning device (4).

Images