Underground frozen wall monitoring device

Abstract

The utility model relates to the technical field of pipeline monitoring, and one embodiment of the utility model provides an underground frozen wall monitoring device which comprises a testing pipe, an inserting opening is formed in the upper end of the testing pipe, optical fiber gyroscopes are arranged at the top and the bottom of a rotation shaft, a linkage frame is arranged on the side wall of the rotation shaft, and a monitoring disc is arranged at the tail end of the linkage frame. The monitoring disc is of an arc-shaped structure. According to the technical scheme, the problems that in the prior art, main means for knowing the development condition of the frozen wall comprise a temperature measurement method, a nondestructive monitoring method (such as an ultrasonic method and a resistivity method) and the like, although the temperature measurement method can directly judge whether the frozen wall is frozen or not and the freezing degree, measurement points are sparse, and a frozen area is difficult to fully cover are solved; the method solves the technical problems that the prior art cannot accurately reflect the state of the whole frozen wall, and has the advantages of large-range coverage and low cost through nondestructive monitoring means such as an ultrasonic method and a resistivity method.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of pipeline monitoring technology, and more specifically, to an underground frozen wall monitoring device. Background Technology

[0002] Artificial ground freezing is a powerful auxiliary method for engineering construction in water-rich and soft strata. With its characteristics of significantly enhancing soil strength and stability, effectively blocking groundwater, and being environmentally friendly, it is widely used in underground engineering fields such as mining, rail transit, and foundation pits. Taking the construction of subway connecting passages as an example, this method has become one of the mainstream choices. However, judging from domestic and foreign construction practices, its safety situation is still not optimistic. Once problems occur in the freezing process, such as insufficient overall strength of the frozen wall or failure to form a cohesive ring, it is very easy to cause water inrush and collapse of the connecting passage, or even serious accidents such as cracking and collapse of existing shield tunnel segments.

[0003] Currently, the main methods for understanding the development of frozen walls include thermometry and non-destructive monitoring methods (such as ultrasonic and resistivity methods). While thermometry can directly determine whether and to what extent the frozen wall is frozen, it suffers from sparse measuring points and difficulty in fully covering the frozen area, thus failing to accurately reflect the overall state of the frozen wall. Although non-destructive monitoring methods such as ultrasonic and resistivity methods have the advantages of wide coverage and low cost, they face many challenges in engineering applications due to the complex relationship between sound wave velocity, resistivity, and temperature, and have not yet gained widespread acceptance. In addition, the judgment of abnormal conditions of frozen walls in existing artificial freezing construction often relies on the data from temperature measuring holes and pressure relief holes. However, in the complex construction scenario with multiple freezing pipes, the limited data from temperature measuring holes or pressure relief holes are insufficient to accurately assess the overall closure of the frozen wall and cannot precisely locate the abnormal position. Especially in seepage strata with high groundwater flow velocity, the cold volume deviation can mislead the assessment results. The shortcomings of traditional monitoring methods in terms of monitoring accuracy, comprehensiveness, and timeliness greatly hinder the safe application of artificial stratum freezing methods, and a more efficient and accurate monitoring device is urgently needed to ensure engineering safety. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide an underground frozen wall monitoring device, which solves the problems of the main means of understanding the development of frozen walls in the prior art, including temperature measurement and non-destructive monitoring methods (such as ultrasonic method and resistivity method). Although temperature measurement can directly determine whether the frozen wall is frozen and the degree of freezing, it has the problem of sparse measuring points and difficulty in fully covering the frozen area, and cannot accurately reflect the state of the entire frozen wall. Although non-destructive monitoring methods such as ultrasonic method and resistivity method have the advantages of wide coverage and low cost, they also have technical problems.

[0005] According to one aspect, at least one embodiment of this disclosure provides a monitoring device for underground frozen walls, comprising:

[0006] A test tube, wherein the upper end of the test tube is provided with an insertion port;

[0007] An insert monitoring assembly is disposed inside the test tube;

[0008] A screw-clamping assembly is disposed inside the test tube;

[0009] The insertion monitoring component includes a rotating shaft that is inserted into the insertion port. An output motor is provided at the upper end of the rotating shaft, and the output end of the output motor is fixedly connected to the rotating shaft. Fiber optic gyroscopes are provided at both the top and bottom of the rotating shaft. A linkage frame is provided on the side wall of the rotating shaft, and a monitoring disk with an arc-shaped structure is provided at the end of the linkage frame.

[0010] As a further technical solution, a positioning cover is provided at the upper end of the insertion port, a stepped groove is provided on the inner side wall of the positioning cover, a positioning disk is fitted on the rotation shaft, and the positioning disk is embedded in the stepped groove.

[0011] As a further technical solution, the screwing clamping assembly includes a screwing shaft, which is inserted into the test tube. The screwing shaft and the test tube are screwed together by bolts. A clamping plate is provided at the end of the screwing shaft, and an anti-slip clamping pad is provided on the inner side of the clamping plate.

[0012] As a further technical solution, a screwing disc is provided at one end of the screwing shaft, and both the clamping disc and the anti-slip clamping pad are arc-shaped structures.

[0013] As a further technical solution, a connecting sleeve is provided on the outer wall of the clamping disk, a rotation cavity is provided inside the connecting sleeve, and a rotating disk is provided at the end of the screwing shaft, the rotating disk being embedded in the rotation cavity.

[0014] As a further technical solution, the number of the screwing shafts is several, and the multiple screwing shafts are evenly distributed on the outer side wall of the test tube.

[0015] As a further technical solution, the number of clamping discs is three, and the three clamping discs are evenly distributed inside the test tube.

[0016] As a further technical solution, the positioning disk has a through hole, and the self-rotating shaft is inserted into the through hole.

[0017] As a further technical solution, a sealing sleeve is provided on the outer wall of the positioning disk, and the sealing sleeve is embedded in the interior of the stepped groove.

[0018] As a further technical solution, the positioning cover is an inverted conical structure, and the positioning disk is a circular structure.

[0019] The beneficial effects of the embodiments disclosed herein are as follows:

[0020] 1. In this disclosure, fiber optic gyroscopes are installed at both the top and bottom of the rotating shaft to accurately monitor the angular changes of the rotating shaft, providing precise data for the position and angle of the monitoring disk. The monitoring disk has an arc-shaped structure and is connected to the rotating shaft through a linkage frame. When the output motor drives the rotating shaft to rotate, the monitoring disk can rotate in all directions to monitor the underground frozen wall from multiple angles. Compared with the problem of sparse measuring points and inability to fully cover the traditional temperature measurement method, this device can acquire monitoring data over a wider area. Furthermore, with the help of high-precision fiber optic gyroscopes, the monitoring accuracy is greatly improved, which can more accurately reflect the actual state of the frozen wall and provide a reliable basis for engineering decisions.

[0021] 2. In this disclosure, multiple screw shafts are evenly distributed on the outer wall of the test tube. The position of the screw shafts can be flexibly adjusted by screwing the bolts. The clamping disc at the end of the screw shaft has an arc-shaped structure and an anti-slip clamping pad on the inner side, which can closely fit the underground frozen wall or the surrounding soil structure and provide a stable clamping force. Even under complex geological conditions, such as soft soil or groundwater impact, the device can remain stable, avoiding the impact of displacement or shaking on the accuracy of monitoring data and ensuring the continuous and stable operation of monitoring work. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0023] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0024] Figure 2 This is an isometric view of the rotation axis disclosed herein;

[0025] Figure 3 This is a cross-sectional view of the test tube disclosed herein;

[0026] Figure 4 This is a cross-sectional view of the screwing shaft of this disclosure;

[0027] In the diagram: 1. Test tube; 2. Insertion port; 3. Insertion monitoring component; 3-1. Rotation shaft; 3-2. Output motor; 3-3. Fiber optic gyroscope; 3-4. Linkage frame; 3-5. Monitoring plate; 3-6. Positioning cover; 3-7. Stepped groove; 3-8. Positioning plate; 4. Twisting clamping component; 4-1. Twisting shaft; 4-2. Clamping plate; 4-3. Anti-slip clamping pad; 4-4. Twisting plate; 5. Connecting sleeve; 6. Rotation cavity; 7. Rotation plate; 8. Through hole; 9. Sealing sleeve. Detailed Implementation

[0028] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0029] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0030] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0031] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.

[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] like Figures 1-4 As shown, it illustrates a ground-level frozen wall monitoring device of this disclosure, characterized in that it comprises:

[0035] Test tube 1, with an insertion port 2 at its upper end;

[0036] Insert monitoring component 3 is installed inside test tube 1;

[0037] The screw clamping assembly 4 is disposed inside the test tube 1;

[0038] The insertion monitoring component 3 includes a rotation shaft 3-1, which is inserted into the insertion port 2. An output motor 3-2 is provided at the upper end of the rotation shaft 3-1, and the output end of the output motor 3-2 is fixedly connected to the rotation shaft 3-1. Fiber optic gyroscopes 3-3 are provided at the top and bottom of the rotation shaft 3-1. A linkage frame 3-4 is provided on the side wall of the rotation shaft 3-1, and a monitoring disk 3-5 is provided at the end of the linkage frame 3-4. The monitoring disk 3-5 has an arc-shaped structure.

[0039] The screw clamping assembly 4 includes a screw shaft 4-1, which is inserted into the test tube 1. The screw shaft 4-1 and the test tube 1 are screwed together by bolts. A clamping plate 4-2 is provided at the end of the screw shaft 4-1, and an anti-slip clamping pad 4-3 is provided on the inner side of the clamping plate 4-2.

[0040] In some examples, the spin shaft 3-1 is inserted into the insertion port 2 of the test tube 1, and the output motor 3-2 is installed on the upper end of the spin shaft 3-1, so that the output end of the output motor 3-2 is firmly fixed to the spin shaft 3-1. Power transmission can be effectively ensured by means of key connection, coupling connection, etc. Fiber optic gyroscopes 3-3 are installed on the top and bottom of the spin shaft 3-1 according to the design requirements. During installation, it is necessary to ensure that the installation position of the fiber optic gyroscope 3-3 is accurate and firmly fixed to avoid displacement during monitoring and affecting the monitoring accuracy. The linkage frame 3-4 is installed on the side wall of the spin shaft 3-1. The installation position of the linkage frame 3-4 should be determined according to the expected working position of the monitoring disk 3-5. The linkage frame 3-4 and the spin shaft 3-1 can be fixed by means of welding, bolt connection, etc. The monitoring disk 3-5 with an arc structure is installed at the end of the linkage frame 3-4. The curvature of the monitoring disk 3-5 should meet the design requirements for the monitoring range and angle of the underground frozen wall.

[0041] Insert the screw shaft 4-1 into the test tube 1. The screw shaft 4-1 and the test tube 1 are connected by screwing on bolts. Install the clamping plate 4-2 at the end of the screw shaft 4-1. The clamping plate 4-2 has an arc-shaped structure. Its curvature should be adapted to the object that needs to be clamped inside the test tube 1 (such as the support structure inside the underground frozen wall). Install the anti-slip clamping pad 4-3 on the inner side of the clamping plate 4-2 to enhance the stability of the clamping.

[0042] like Figures 1-4 As shown, in this embodiment, a positioning cover 3-6 is provided at the upper end of the insertion port 2, a stepped groove 3-7 is provided on the inner side wall of the positioning cover 3-6, and a positioning disk 3-8 is fitted on the rotation shaft 3-1, with the positioning disk 3-8 embedded in the stepped groove 3-7.

[0043] In some examples, a positioning cover 3-6 is installed at the upper end of the insertion port 2. The stepped groove 3-7 on the inner side wall of the positioning cover 3-6 is used for positioning. The positioning plate 3-8 is fitted onto the rotation shaft 3-1, and the positioning plate 3-8 is embedded in the stepped groove 3-7. The positioning cover 3-6 is designed as an inverted conical structure, and the positioning plate 3-8 is a circular structure. This design helps to better position and install the device.

[0044] For example, such as Figure 4 As shown, a screwing disc 4-4 is provided at one end of the screwing shaft 4-1, and both the clamping disc 4-2 and the anti-slip clamping pad 4-3 are arc-shaped structures.

[0045] In some examples, a screwing disc 4-4 is installed at one end of the screwing shaft 4-1 to facilitate manual screwing by the operator.

[0046] For example, such as Figure 4As shown, a connecting sleeve 5 is provided on the outer wall of the clamping disk 4-2, and a self-rotating cavity 6 is provided inside the connecting sleeve 5. A self-rotating disk 7 is provided at the end of the screwing shaft 4-1, and the self-rotating disk 7 is embedded in the self-rotating cavity 6.

[0047] In some examples, for the connection structure of the clamping disk 4-2, a connecting sleeve 5 is installed on the outer wall of the clamping disk 4-2, a self-rotating cavity 6 is set inside the connecting sleeve 5, and a self-rotating disk 7 is set at the end of the screwing shaft 4-1. The self-rotating disk 7 is embedded in the self-rotating cavity 6. This structure allows the clamping disk 4-2 to rotate at a certain angle under the drive of the screwing shaft 4-1, so as to better adapt to the clamped objects of different shapes and positions.

[0048] For example, such as Figure 1 As shown, there are several screw shafts 4-1, which are evenly distributed on the outer side wall of the test tube 1. There are three clamping discs 4-2, which are evenly distributed inside the test tube 1.

[0049] In some examples, three clamping discs 4-2 are typically set up evenly distributed inside the test tube 1 to ensure stable clamping and monitoring of the object being monitored.

[0050] For example, such as Figure 1 As shown, the positioning disk 3-8 has a through hole 8, the self-rotating shaft 3-1 is inserted into the through hole 8, the outer wall of the positioning disk 3-8 is provided with a sealing sleeve 9, the sealing sleeve 9 is embedded in the stepped groove 3-7, the positioning cover 3-6 is an inverted conical structure, and the positioning disk 3-8 is a circular structure.

[0051] In some examples, the positioning disk 3-8 has a through hole 8, and the rotating shaft 3-1 is accurately inserted into the through hole 8. To ensure sealing, a sealing sleeve 9 is installed on the outer wall of the positioning disk 3-8, so that the sealing sleeve 9 is embedded in the stepped groove 3-7.

[0052] When in use, the assembled underground frozen wall monitoring device is transported to the construction site. The test tube 1 is slowly inserted into the underground frozen wall to be monitored using appropriate mechanical equipment (such as drilling rigs, cranes, and other auxiliary equipment). During the insertion process, the operator can adjust the screwing shaft 4-1 by turning the screwing disc 4-4, which in turn drives the clamping disc 4-2 to initially clamp and fix the surrounding soil or frozen wall structure, ensuring the stability of the device during the insertion process.

[0053] The output motor 3-2 is started, which drives the rotation shaft 3-1 to rotate, thereby causing the linkage frame 3-4 and the monitoring disk 3-5 to rotate around the rotation shaft 3-1. During the rotation, the fiber optic gyroscopes 3-3 at the top and bottom monitor the angle change of the rotation shaft 3-1 in real time, thereby obtaining the angle information of the monitoring disk 3-5 at different positions. During the rotation, the monitoring disk 3-5 can monitor the state of the surrounding underground frozen wall. For example, the temperature, stress and strain data of the frozen wall can be obtained by the sensors installed on the monitoring disk 3-5 (such as temperature sensors, strain sensors, etc., installed according to specific monitoring needs). These data are transmitted to the ground data processing center for analysis and processing through the fiber optic gyroscope 3-3 and the connecting lines.

[0054] When monitoring pipelines that have been in use for a long time, the self-rotating shaft 3-1 can be directly inserted into the pipeline for rotation monitoring without the need for a matching monitoring tube.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications or substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. An underground frozen wall monitoring apparatus, characterized by, include: Test tube (1), the upper end of which is provided with an insertion port (2); Inserted monitoring component (3), wherein the inserted monitoring component (3) is disposed inside the test tube (1); A screw-clamping assembly (4) is disposed inside the test tube (1); The insertion monitoring component (3) includes a rotating shaft (3-1), which is inserted into the insertion port (2). An output motor (3-2) is provided at the upper end of the rotating shaft (3-1), and the output end of the output motor (3-2) is fixedly connected to the rotating shaft (3-1). Fiber optic gyroscopes (3-3) are provided at both the top and bottom of the rotating shaft (3-1). A linkage frame (3-4) is provided on the side wall of the rotating shaft (3-1), and a monitoring disk (3-5) is provided at the end of the linkage frame (3-4). The monitoring disk (3-5) has an arc-shaped structure.

2. A device for monitoring a frozen ground wall according to claim 1, wherein The upper end of the insertion port (2) is provided with a positioning cover (3-6), the inner side wall of the positioning cover (3-6) is provided with a stepped groove (3-7), and a positioning disk (3-8) is fitted on the rotation shaft (3-1), the positioning disk (3-8) is embedded in the stepped groove (3-7).

3. A device for monitoring a frozen ground wall according to claim 1, wherein The screwing clamping assembly (4) includes a screwing shaft (4-1), which is inserted into the test tube (1). The screwing shaft (4-1) and the test tube (1) are screwed together by bolts. A clamping plate (4-2) is provided at the end of the screwing shaft (4-1), and an anti-slip clamping pad (4-3) is provided on the inner side of the clamping plate (4-2).

4. A device for monitoring a frozen ground wall according to claim 3, wherein One end of the screwing shaft (4-1) is provided with a screwing disc (4-4), and both the clamping disc (4-2) and the anti-slip clamping pad (4-3) are arc-shaped structures.

5. A device for monitoring a frozen ground wall according to claim 3, wherein The outer wall of the clamping disc (4-2) is provided with a connecting sleeve (5), the inside of the connecting sleeve (5) is provided with a rotation cavity (6), the end of the screwing shaft (4-1) is provided with a rotating disk (7), and the rotating disk (7) is embedded in the rotating cavity (6).

6. A device for monitoring a frozen ground wall according to claim 3, wherein The number of the screwing shafts (4-1) is several, and the multiple screwing shafts (4-1) are evenly distributed on the outer side wall of the test tube (1).

7. A device for monitoring a frozen ground wall according to claim 3, wherein The number of clamping discs (4-2) is 3, and the 3 clamping discs (4-2) are evenly distributed inside the test tube (1).

8. A device for monitoring a frozen ground wall according to claim 2, wherein The positioning disk (3-8) has a through hole (8), and the self-rotating shaft (3-1) is inserted into the through hole (8).

9. The apparatus of claim 2, wherein, The outer wall of the positioning disk (3-8) is provided with a sealing sleeve (9), which is embedded in the interior of the stepped groove (3-7).

10. The apparatus of claim 2, wherein, The positioning cover (3-6) is an inverted conical structure, and the positioning disk (3-8) is a circular structure.

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