Sensor support for monitoring water and soil pressure of stratum around shield in real time

Abstract

The utility model discloses a sensor support for monitoring the water and soil pressure of a stratum around a shield in real time, which relates to the technical field of sensor supports and comprises a first support, a second support and a third support which are connected through bolts. The front end of the first support is of a conical structure, and a first backing ring, a second backing ring and a third backing ring are welded to the first support. According to the utility model, the first support is provided with the first backing ring, the second backing ring and the third backing ring which are used for installing a water pressure sensor and a soil pressure sensor, and the lower inclined reinforcing bars are used for supporting the third backing ring of the soil pressure sensor, so that the stability of the third backing ring is ensured when the first support is buried, and the stability of monitoring data is facilitated; the first support, the second support and the third support are connected through bolts, the requirement for the burying length is met, each section of support is provided with three transverse supports, and the structural stability is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of sensor support technology, and in particular to a sensor support for real-time monitoring of soil and water pressure in the strata surrounding a tunnel boring machine. Background Technology

[0002] In recent years, with the advancement of national development strategies and the continuous improvement of infrastructure construction, high-speed rail networks, expressway networks, and urban road networks have developed rapidly. Due to its high efficiency and adaptability, shield tunneling has been widely used in large-scale projects such as river and sea tunnels and urban underground transportation networks. In particular, large-diameter and ultra-large-diameter shield tunnels, due to their high space utilization, are widely used in areas with extremely high risk sources, such as those crossing river and sea dikes, high-rise buildings in cities, high-speed railways, military railways, precision instrument and equipment rooms, and ultra-high-voltage power transmission equipment.

[0003] However, precisely controlling ground settlement and disturbance during the construction of ultra-large diameter shield tunnels has become a major challenge. Currently, a common approach is to set up test sections before crossing risk sources to monitor ground settlement and then adjust the tunneling parameters accordingly. However, this method has significant limitations: it can only infer underground conditions from surface settlement phenomena, making it difficult to accurately determine the specific causes of surface settlement, such as changes in soil and water pressure or the impact of disturbances during tunneling. This leads to a lack of precision in adjusting tunneling parameters, increasing construction risks and difficulties. While some sensor supports have been used for monitoring during shield tunneling, these supports generally suffer from the following drawbacks:

[0004] Traditional support structures are often single-structure designs lacking specific support features, making them prone to deformation or displacement under complex geological conditions, which affects the accuracy of monitoring data. Sensor cables are usually exposed or simply fixed, making them susceptible to external environmental factors (such as water and soil impact, mechanical vibration), which can cause cable damage or signal interruption, thus affecting monitoring performance. Traditional support systems lack real-time monitoring capabilities of the underground environment, making it difficult to effectively avoid shield machine collisions caused by inaccurate depth estimation or improper operation, thus increasing construction risks. Utility Model Content

[0005] This utility model provides a sensor bracket for real-time monitoring of soil and water pressure around a tunnel boring machine, including bracket one, bracket two, and bracket three. Bracket one, bracket two, and bracket three are connected by bolts. The front end of bracket one has a conical structure, and bracket one, bracket two, and bracket three are welded on bracket one. Wire grooves are opened on the inner walls of both sides of bracket one, bracket two, and bracket three. Sliding grooves are opened on the upper and lower walls of the wire grooves, and protective sleeves are slidably installed in the sliding grooves.

[0006] Preferably, the end of the support ring three is connected to the end of the bracket one with a steel bar.

[0007] Preferably, the other end of the first bracket is provided with a fixing piece 1, and the first bracket is provided with a fixing piece 2 at one end. The fixing piece 1 is located on the lower side of the fixing piece 2 and is fixed by bolts.

[0008] Preferably, both bracket two and bracket three are provided with three sets of cross braces on their inner sides, and the lower side of the cross braces is provided with an arc groove.

[0009] Preferably, a supporting steel bar is placed in the arc groove, and the two ends of the supporting steel bar are placed on a flat plate. Two sets of symmetrical limiting blocks are provided on the upper side of the flat plate, and the limiting blocks limit the supporting steel bar.

[0010] Preferably, the lower side of the flat plate is provided with several anti-slip protrusions.

[0011] Preferably, a side plate is provided on one side of the protective sleeve, and a plurality of sliding holes are provided on one side of the side plate. A plurality of connecting rods are provided on one side of the protective sleeve, and the connecting rods are slidably connected to the sliding holes.

[0012] Preferably, an elastic element is connected between the connecting rod and the inner wall of the sliding hole.

[0013] Preferably, a fixing sleeve is provided on the other side of the bracket, a waterproof cover is installed inside the fixing sleeve, and a camera is installed inside the waterproof cover.

[0014] Preferably, the waterproof cover has a ring frame near the camera's shooting end, and lighting lights are distributed in a ring on the ring frame.

[0015] This utility model provides a sensor bracket for real-time monitoring of soil and water pressure around a tunnel boring machine, which, compared with the prior art:

[0016] 1. This utility model has a bracket with three support rings on the bracket to install water pressure sensor and soil pressure sensor. The inclined steel bars below support the soil pressure sensor support ring three, ensuring the stability of support ring three when the bracket is buried, which is conducive to the stability of monitoring data. The front end of the bracket adopts a conical design to facilitate the burial of the bracket. The brackets are connected by bolts to meet the burial length, and each bracket section is equipped with three cross braces to ensure structural stability.

[0017] 2. This utility model uses cable trays on brackets one, two, and three to house the sensor cables. After the cables enter the cable trays, they are protected by protective sleeves. When the protective sleeves are impacted by water and soil, the elastic elements protect the internal cables, thereby reducing the direct impact of external forces on the internal cables. Combined with the camera to capture images of the underground environment, this avoids situations where the shield machine itself might come into contact with errors in depth estimation or improper operation, which could potentially affect the safety of the shield machine. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram showing the overall structure of an embodiment of the present utility model.

[0021] Figure 3 This is an embodiment of the present utility model. Figure 2 A schematic diagram of the structure at point A;

[0022] Figure 4 This is a schematic diagram of the support structure according to an embodiment of the present utility model;

[0023] Figure 5 This is a cross-sectional schematic diagram of the waterproof cover structure according to an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram showing the disassembled structure of the protective sleeve and side plate according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the supporting steel reinforcement structure according to an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the flat plate structure according to an embodiment of the present utility model.

[0027] Figure label:

[0028] 1. Bracket 1; 2. Support ring 1; 3. Support ring 2; 4. Support ring 3; 5. Rebar; 6. Bracket 2; 7. Bracket 3; 8. Cross brace; 9. Arc groove; 10. Fixing plate 1; 11. Fixing plate 2; 12. Sliding groove; 13. Cable groove; 14. Protective sleeve; 15. Side plate; 16. Sliding hole; 17. Elastic element; 18. Connecting rod; 19. Fixing sleeve; 20. Waterproof cover; 21. Camera; 22. Ring frame; 23. Lighting lamp; 24. Supporting steel bar; 25. Flat plate; 26. Limiting block; 27. Anti-slip protrusions. Detailed Implementation

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please refer to Figures 1-8 This utility model embodiment provides a sensor bracket for real-time monitoring of soil and water pressure around a shield tunnel, including bracket 1, bracket 2 6 and bracket 3 7. Bracket 1, bracket 2 6 and bracket 3 7 are connected by bolts. The length of each section of bracket 1, bracket 2 6 and bracket 3 7 should be 2-3m. To facilitate the installation of the bracket, the front end of bracket 1 is tapered.

[0031] To facilitate connection, a fixing plate 10 is provided at the other end of bracket 1, a fixing plate 21 is provided at one end of bracket 26, and a fixing plate 10 is also provided at the other end. The fixing plate 10 is located below the fixing plate 211 and is fixed by bolts. Similarly, a fixing plate 211 is also provided at one end of bracket 37 for connection with bracket 26.

[0032] Furthermore, bracket 1 is welded with support ring 2, support ring 3, and support ring 4. Support ring 2 and support ring 3 are parallel to bracket 1 and are used to install water pressure sensor and soil pressure sensor. Support ring 4 is perpendicular to bracket 1 and is used to install soil pressure sensor. Support ring 4 is connected to the end of bracket 1 with steel bar 5 to ensure the stability of support ring 4 when the bracket is buried, which is conducive to the stability of monitoring data.

[0033] In addition, three sets of cross braces 8 are installed on the inner sides of bracket 2 6 and bracket 3 7 to ensure structural stability.

[0034] Furthermore, an arc groove 9 is provided on the lower side of the cross brace 8, and a supporting steel bar 24 is placed in the arc groove 9. During the process of lowering the shaft, the support frame 1, support frame 2 6 and support frame 3 7 need to be spliced ​​together section by section. As the support frame is continuously spliced ​​and lowered, the overall weight becomes larger and larger, which cannot be borne by manpower. However, when splicing the frame, it is necessary to maintain the stability of the lowered frame. Therefore, a supporting steel bar 24 is erected at the opening. The supporting steel bar 24 contacts the arc groove 9 of the cross brace 8 to ensure the stability of the lowered frame.

[0035] In addition, the soil piled at the opening is relatively soft, so steel flat plates 25 are placed on both sides of the opening, and the two ends of the supporting steel bars 24 are placed on the flat plates 25. Two sets of symmetrical limiting blocks 26 are set on the upper side of the flat plates 25, and the limiting blocks 26 limit the supporting steel bars 24.

[0036] Several anti-slip protrusions 27 are provided on the lower side of the tablet 25 to enhance the stability of the tablet 25 after it is placed.

[0037] During the lowering of the support, the surrounding water and soil will have a significant impact on the sensor wiring, and may even damage it, potentially causing sensor signal loss. Therefore, wire grooves 13 are provided on the inner walls of both sides of support 1, support 6, and support 7. The sensor cable is wound from the opening on the outside of the support into the wire groove 13. At the same time, sliding grooves 12 are provided on the upper and lower walls of the wire groove 13. Protective sleeves 14 are slidably installed in the sliding grooves 12, and the protective sleeves 14 are used to protect the cable, which not only fixes the cable, but also protects it.

[0038] It is worth noting that a side plate 15 is provided on one side of the protective sleeve 14, and a number of sliding holes 16 are opened on one side of the side plate 15. A number of connecting rods 18 are provided on one side of the protective sleeve 14. The connecting rods 18 are slidably connected to the sliding holes 16. An elastic element 17 is connected between the connecting rods 18 and the inner wall of the sliding holes 16. The elastic element 17 can be a metal spring, a damping spring or other equipment that conforms to the art. Through the elastic action of the elastic element 17, when the protective sleeve 14 is subjected to water and soil impact, the impact is buffered, and the protection effect of the cable is enhanced.

[0039] Furthermore, a fixing sleeve 19 is provided on the other side of the support frame 1. A waterproof cover 20 is installed inside the fixing sleeve 19. A camera 21 is installed inside the waterproof cover 20. The camera 21 can capture images of the environment underground, which can prevent the support frame from touching the tunnel boring machine when it is lowered into the well. The waterproof cover 20 at the shooting end of the camera 21 is made of transparent material.

[0040] In addition, a ring frame 22 is provided near the shooting end of the camera 21 on the waterproof cover 20. Lighting lamps 23 are distributed in a ring on the ring frame 22. The lighting lamps 23 are used to illuminate the dark environment in the well to assist the camera 21 in shooting and improve the clarity of the shooting.

[0041] In summary, the working principle of the sensor support for real-time monitoring of soil and water pressure around a tunnel boring machine according to this utility model embodiment is as follows: First, support 1 is guided into the ground through its conical front end, and support 2 6 and support 3 7 are connected in sequence with bolts. Water pressure and soil pressure sensors are installed on support ring 1 2, support ring 2 3 and support ring 3 4. Then, the sensor cable is arranged in the cable groove 13 and protected with a protective sleeve 14. During the lowering process of the support, the support can be supported by the support steel bar 24 to facilitate the splicing of the support. At the same time, the environment is monitored in real time by the camera 21 and the lighting lamp 23 to ensure that the lowering operation is completed safely and without contact.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time, comprising support one (1), support two (6) and support three (7), characterized in that: The support one (1), support two (6) and support three (7) are connected through bolts, the front end of the support one (1) is a conical structure, and the support one (1) is welded with a support ring one (2), a support ring two (3) and a support ring three (4), the two side inner walls of the support one (1), the support two (6) and the support three (7) are provided with wire grooves (13), the upper and lower side walls of the wire grooves (13) are provided with sliding grooves (12), and the sliding grooves (12) are slidably provided with protective sleeves (14).

2. The sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time according to claim 1, characterized in that: The support ring three (4) is connected with the end of the support one (1) and is provided with a reinforcing bar (5).

3. The sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time according to claim 2, characterized in that: The other end of the support one (1) is provided with a fixed sheet one (10), one end of the support two (6) is provided with a fixed sheet two (11), the fixed sheet one (10) is located below the fixed sheet two (11) and is fixed through bolts.

4. The sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time according to claim 3, characterized in that: The inner sides of the support two (6) and the support three (7) are provided with three groups of cross braces (8), and the lower sides of the cross braces (8) are provided with arc grooves (9).

5. The sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time according to claim 4, characterized in that: The arc grooves (9) are placed with supporting steel bars (24), the two ends of the supporting steel bars (24) are placed on flat plates (25), the upper sides of the flat plates (25) are provided with two groups of symmetrical limiting blocks (26), and the supporting steel bars (24) are limited by the limiting blocks (26).

6. The sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time according to claim 5, characterized in that: The lower side of the flat plate (25) is provided with a plurality of anti-skid convex points (27).

7. The sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time according to claim 1, characterized in that: One side of the protective sleeve (14) is provided with a side plate (15), a plurality of sliding holes (16) are formed in one side of the side plate (15), one side of the protective sleeve (14) is provided with a plurality of connecting rods (18), and the connecting rods (18) and the sliding holes (16) are slidably connected.

8. The sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time according to claim 7, characterized in that: The connecting rods (18) and the inner walls of the sliding holes (16) are connected with elastic members (17).

9. The sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time according to claim 8, characterized in that: The other side of the support one (1) is provided with a fixed sleeve (19), the fixed sleeve (19) is provided with a waterproof cover (20), and the waterproof cover (20) is provided with a camera (21).

10. The sensor support for monitoring the water and soil pressure of the ground surrounding a shield in real time according to claim 9, characterized in that: The waterproof cover (20) is provided with an annular frame (22) close to the shooting end of the camera (21), and the annular frame (22) is annularly provided with illuminating lamps (23).

Images