A tunnelling drill rig adjustable water barrier device and method of use thereof

Abstract

The application discloses a kind of adjustable water retaining device of tunnel rock drilling gantry and its using method, the device includes base, connecting rod and water retaining umbrella surface, the water retaining umbrella surface is supported by one end of connecting rod, the other end of connecting rod is installed on base by rotating shaft, connecting rod can be rotated to adjust angle, the connecting rod is telescopic structure, by adjusting the angle and height of connecting rod to further adjust the angle and height of water retaining umbrella surface;The base is installed on tunnel rock drilling gantry, the water retaining umbrella surface guides groundwater to tunnel bottom;The water retaining device of the application adopts ingenious design, can efficiently guide the groundwater that emerges along the crack of cave wall, by specially-made water retaining cloth, water flow is smoothly directed to tunnel bottom, significantly reduce the damage that may be caused to construction equipment due to groundwater disturbance during drilling construction process.

Description

Technical Field

[0001] This invention belongs to the field of waterproofing and water-blocking technology for drilling on tunnel smooth blasting drilling platforms, and particularly relates to an adjustable water-blocking device for tunnel drilling platforms and its usage method. Background Technology

[0002] Tunnel construction is a key engineering project for traversing terrain, enabling the crossing of natural obstacles such as mountains and rivers, and effectively connecting areas isolated by geographical conditions. This not only significantly improves the efficiency and convenience of transportation, but also, as an important link in highway or railway networks, significantly shortens travel distances, reduces the need for detours, thereby lowering logistics costs and improving the performance of the entire transportation system. As construction progresses, the requirements for construction quality and efficiency are also constantly increasing.

[0003] In current tunnel construction practices, smooth blasting is a mainstream tunnel excavation technique, requiring workers to stand on drilling platforms to perform drilling tasks. During drilling and blasting, the hydrostatic and hydrodynamic pressures of groundwater may exacerbate the expansion of fissures in the rock mass, thereby increasing its permeability. After blasting, the water-impermeable rock mass is damaged, often leading to seepage or water inrush through the tunnel walls. Especially during tunnel excavation, if encountering water-bearing strata such as limestone or sandstone, or affected by fault zones and underground rivers, the original groundwater dynamic balance may be disrupted by the excavation activities, causing a large amount of groundwater to rush into the tunnel along the fissures created by blasting. This not only damages construction equipment but may also threaten the lives of construction workers. Therefore, in this context, the design of water-retaining devices on drilling platforms is particularly important. It not only ensures construction safety and improves the efficiency of excavation operations but also helps reduce construction costs, playing a crucial role in the entire tunnel construction project.

[0004] Despite the various solutions proposed by existing technologies for tunnel water inrush drainage, the problems of water seepage and sudden water inrush in the tunnel walls still damage construction equipment and adversely affect the safety and work efficiency of construction personnel, which remains a thorny challenge. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides an adjustable water-blocking device for a tunnel drilling platform and its usage method. This device can effectively guide groundwater gushing from the tunnel wall after blasting along the water-guiding grooves on the waterproof cloth to the bottom of the tunnel, preventing groundwater splashing, protecting construction equipment and workers, and preventing water from interfering with the construction progress and potentially damaging the equipment.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect of the invention, an adjustable water-blocking device for a tunnel drilling platform is provided, comprising a base, a connecting rod, and a water-blocking umbrella surface. The water-blocking umbrella surface is supported by one end of the connecting rod, and the other end of the connecting rod is mounted on the base via a rotating shaft. The connecting rod is rotatable for angle adjustment. The connecting rod is a telescopic structure, and the angle and height of the water-blocking umbrella surface are adjusted by adjusting the angle and height of the connecting rod. The base is mounted on the tunnel drilling platform, and the water-blocking umbrella surface guides groundwater to flow to the bottom of the tunnel.

[0008] In some embodiments of the present invention, the rotating shaft includes a rotating collar, a rotating shaft body, a retaining ring, and a fixing rod. The end of the connecting rod extends into the rotating shaft body, and the end of the connecting rod is provided with a fixing hole. The fixing rod is disposed in the rotating shaft body and passes through the fixing hole. The rotating shaft body is disposed in the rotating collar, and the rotating shaft body and the rotating collar are fixed by the retaining ring.

[0009] In some embodiments of the present invention, the retaining ring is a semi-circular ring structure, with protrusions at both ends of the retaining ring. The protrusions cooperate with the grooves on the rotating shaft ring, and the internal teeth on the retaining ring mesh with the external teeth on the rotating shaft.

[0010] In some embodiments of the present invention, the base is a plate structure, and the base is provided with bolt holes to accommodate cross bolts, which are fixed to the steel mesh of the rock drilling platform.

[0011] In some embodiments of the present invention, the water-blocking umbrella surface includes an umbrella frame and a waterproof cloth, wherein the waterproof cloth is installed on the umbrella frame by magnetic attraction.

[0012] In some embodiments of the present invention, the umbrella frame includes a first arc-shaped rod and a second arc-shaped rod, the first arc-shaped rod and the second arc-shaped rod are connected by a first horizontal bar, a second horizontal bar and a third horizontal bar from top to bottom, and the first horizontal bar and the second horizontal bar are connected by a cross bar and a vertical bar.

[0013] In some embodiments of the present invention, a hinged connector is provided at the middle position of the vertical rod, and the cross rod is connected to the end of the connecting rod through the hinged connector.

[0014] In some embodiments of the present invention, the waterproof fabric is made of multiple layers of high abrasion-resistant polyester and nylon fibers, and vertical water-guiding grooves are provided on the waterproof fabric.

[0015] In a second aspect of the invention, a tunnel drilling platform is provided, including an adjustable water-blocking device, the base of which is fixed on the tunnel drilling platform, and multiple adjustable water-blocking devices are provided.

[0016] In a third aspect of the invention, a method of using an adjustable water-blocking device is provided, comprising:

[0017] Assemble the water-blocking umbrella surface by firmly fixing the waterproof cloth to the umbrella frame; then, connect and fix the water-blocking umbrella surface to the connecting rod by hinge; next, anchor the base to the working platform using cross bolts; after the base is fixed, insert the connecting rod into the reserved groove of the rotating shaft, and adjust the angle and length of the connecting rod according to the construction requirements and the tunnel diameter to ensure that the water-blocking umbrella surface fits tightly against the tunnel wall;

[0018] Meanwhile, the width of the water-blocking umbrella can be adjusted by telescopic crossbars according to the area and location of the water inrush area to adapt to different working conditions; for large-area water inrush cracks, multiple water-blocking devices can be deployed on the same working platform for parallel use.

[0019] One or more technical solutions of the present invention have the following beneficial effects:

[0020] 1. This invention, by setting up a water-blocking umbrella-like surface, effectively guides groundwater gushing from the tunnel walls after blasting along the water-guiding grooves on the waterproof fabric to the bottom of the tunnel. This avoids the splashing of groundwater, protects construction equipment and workers, and prevents water from interfering with the construction progress and potentially damaging the equipment.

[0021] 2. The transverse width of the water-blocking umbrella surface of this invention is designed with an adjustment mechanism, allowing it to be flexibly adjusted according to the actual area of ​​water inflow. This adjustability ensures that the device can adapt to different tunnel cross-sections and different water inflow conditions, improving the adaptability and efficiency of construction. Overall, this invention provides a safe and practical technical solution for groundwater control during tunnel construction, helping to improve construction quality and ensure worker safety.

[0022] 3. The telescopic connecting rod design of this invention provides greater flexibility to adapt to different tunnel diameters. This design allows the dimensions of the drilling platform to be adjusted according to the actual size of the tunnel, ensuring that the water-retaining umbrella surface can effectively contact the water-bearing fissures, thereby guiding groundwater flow to the predetermined area. This function not only improves the applicability of the device but also optimizes construction efficiency.

[0023] 4. Furthermore, the entire device is designed for easy assembly and disassembly, allowing for rapid deployment or removal of the water-blocking device on-site to meet different construction stages and needs. All components are made of steel, which is wear-resistant and rust-resistant, ensuring the device's long-term durability and stability. This also means that these components can be repeatedly used in different projects, improving resource utilization efficiency and reducing construction costs.

[0024] 5. This invention ensures that drilling equipment operates in a dry environment, effectively reducing safety risks caused by groundwater erosion and improving equipment efficiency. Simultaneously, by minimizing groundwater interference, drilling accuracy is significantly improved, which is crucial for ensuring the quality and precision of tunnel construction. This adjustable water-blocking device is highly flexible and can be adjusted in a timely manner according to actual construction conditions and needs to adapt to construction requirements under different geological conditions. It solves the long-standing problem of water seepage and inrush in tunnel construction, and also improves construction safety, efficiency, and precision, which is of great value in promoting the advancement of tunnel construction technology and improving project quality. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the adjustable water-blocking device in Embodiment 1 of the present invention;

[0026] Figure 2 This is a schematic diagram of the base structure in Embodiment 1 of the present invention;

[0027] Figure 3(a) is a schematic diagram of the rotating collar, Figure 3(b) is a schematic diagram of the rotating shaft body, and Figure 3(c) is a schematic diagram of the retaining ring.

[0028] Figure 4 This is a schematic diagram of the structure of the fixing rod and the connecting rod in Embodiment 1 of the present invention;

[0029] Figure 5(a) is a front view of the umbrella frame, and Figure 5(b) is a side view of the umbrella frame.

[0030] Figure 6 This is a schematic diagram of multiple adjustable water-blocking devices installed on the rock drilling platform in Embodiment 1 of the present invention;

[0031] The components include: 1. Base; 101. Cross bolt; 2. Connecting rod; 201. Connecting rod fixing hole; 3. Waterproof umbrella surface; 301. Waterproof cloth; 302. First crossbar; 303. Second crossbar; 304. Third crossbar; 305. Cross bar; 306. Arc bar; 307. Umbrella frame; 308. Water guide groove; 309. Hinged connector; 310. Vertical bar; 4. Rotating shaft; 401. Rotating shaft collar; 402. Rotating shaft body; 403. Gear ring; 404. Fixing rod; 405. Rotating shaft body fixing hole; 406. Rotating shaft collar groove. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Example 1

[0034] In a typical embodiment of the present invention, an adjustable water-blocking device for a tunnel drilling platform is proposed, such as... Figure 1 As shown, the system includes a base 1, a connecting rod 2, and a water-blocking umbrella 3. The water-blocking umbrella 3 is supported by one end of the connecting rod 2, and the other end of the connecting rod 2 is mounted on the base via a rotating shaft 4. The connecting rod 2 can be rotated to adjust its angle. The connecting rod 2 is a telescopic structure. By adjusting the angle and height of the connecting rod 2, the angle and height of the water-blocking umbrella 3 can be adjusted. The base 1 is mounted on a tunnel drilling platform, and the water-blocking umbrella 3 guides groundwater flow to the bottom of the tunnel.

[0035] Specifically, base 1, as the foundational component of the device, provides a robust support base and connects to the drilling platform. Connecting rod 2 acts as an intermediate link between base 1 and the water-retaining umbrella surface 3. Its design allows for flexible adjustment of the height and tilt angle of the water-retaining umbrella surface according to site requirements, effectively guiding the gushing groundwater along the tunnel walls and the umbrella surface towards the tunnel bottom. This adjustable design allows the device to adapt to different construction environments and geological conditions, improving its applicability and flexibility. The connection between base 1 and connecting rod 2 is achieved through a rotating shaft 4, which is the key mechanical component for adjusting the height and angle of the connecting rod. Furthermore, the connection between the connecting rod and the water-retaining umbrella surface employs a hinge mechanism, allowing the umbrella surface to rotate relative to the connecting rod, thereby adjusting the direction of the umbrella surface for more efficient water flow guidance.

[0036] like Figure 2 As shown, the base 1 is a plate structure with bolt holes to accommodate cross bolts 101. These cross bolts 101 are fixed to the steel mesh of the drilling rig, ensuring the base is securely anchored to the working platform. The working platform of the drilling rig itself is constructed of woven steel bars, providing the necessary strength and stability. To enhance the connection between the base and the steel mesh, cross-shaped steel bars are welded to the bolt heads, increasing the bonding strength between the bolts and the base and preventing rotation or loosening under heavy pressure or vibration. The cross bolt connection method ensures sufficient contact area between the base and the steel working platform, effectively fixing the base in the desired position. This fixing mechanism not only ensures system stability but also simplifies installation and disassembly, allowing construction personnel to quickly adjust the device according to specific construction needs.

[0037] The key function of the base is to provide stable support for the entire water-blocking device. To achieve this, the base employs a design with positioning bolts and a rotating shaft. Specifically, the base is securely attached to the drilling platform by passing through it with cross bolts. This design utilizes the common fastening method of bolts in mechanical structures, ensuring that the device maintains high stability in various construction environments and preventing displacement or shaking during drilling operations.

[0038] In this embodiment, the connecting rod 2 is constructed from a telescopic rectangular steel tube. Its design optimizes structural stability and torsional resistance, and the rectangular cross-section provides higher rigidity compared to traditional circular steel tubes. The rectangular steel tube is made of high-strength steel, ensuring its load-bearing capacity and durability.

[0039] like Figures 3(a)-3(c) as well as Figure 4 As shown, the rotating shaft 4 includes a rotating collar 401, a rotating shaft body 402, a retaining ring 403, and a fixing rod 404. The end of the connecting rod 2 extends into the rotating shaft body 402, and the bottom end of the connecting rod 2 is provided with a connecting rod fixing hole 201 so as to achieve a stable connection with the rotating shaft body 402 by inserting the fixing rod 404. This design ensures stability and safety during the connection process. To adapt to use in harsh environments such as tunnels, the surface of the connecting rod 2 is treated with a special coating to enhance its corrosion resistance, thereby ensuring long-term performance maintenance.

[0040] Furthermore, the fixing rod 404 is disposed inside the rotating shaft body 402 and passes through the connecting rod fixing hole 201. The rotating shaft body 402 is disposed inside the rotating collar 401. The rotating shaft body 402 and the rotating collar 401 are fixed by a retaining ring 403. The rotating collar 401 is provided with a rotating collar groove 406 to provide rotation space for the connecting rod 2.

[0041] Furthermore, the retaining ring 403 has a semi-circular ring structure, with protrusions at both ends. The protrusions cooperate with the grooves on the rotating shaft ring 401, and the internal teeth on the retaining ring 403 mesh with the external teeth on the rotating shaft body 402.

[0042] The specific installation steps of the rotating shaft are as follows: The rotating shaft body 402 is inserted and fixed inside the rotating shaft ring 401, and then the connecting rod 2 is pushed into the groove reserved in the rotating shaft body 402. Next, the fixing rod 404 is inserted through the connecting rod fixing hole 201 and the rotating shaft body fixing hole 405 to achieve structural stability. Finally, the retaining ring 403 and the groove of the rotating shaft ring 401 are engaged with each other. With the meshing of the serrations at the top of the rotating shaft body 402 and the retaining ring 403, and the concave-convex fit between the retaining ring 403 and the rotating shaft ring 401, the adjustment of the connecting rod angle is facilitated, while ensuring a firm connection between the base and the rotating shaft.

[0043] The rotating shaft 402 is the core component of this adjustment mechanism. It combines with the rotating collar 401 to provide the necessary rotational capability. The stability of the connecting rod 2 after angle adjustment is ensured by the engagement of the fixing rod 404 with the corresponding fixing hole. The retaining ring 403, through its serrations with the rotating shaft 402, forms an anti-rotation mechanism, increasing the reliability of the structure. Furthermore, its protruding portion combines with the recessed portion of the rotating collar 401, allowing operators to easily adjust the angle of the connecting rod 2 while maintaining the tightness and stability of the entire structural unit.

[0044] In this embodiment, the rotating shaft 402 and the connecting rod 2 are fixedly connected by a fixing rod passing through pre-drilled holes in both. The serrations of the retaining ring 403 effectively engage with the serrations of the rotating shaft 402. This design prevents unintentional rotation of the rotating shaft during adjustment, ensuring precise and controllable positioning of the water-retaining umbrella surface. The protruding part of the retaining ring inserts into the groove of the rotating shaft ring, thereby fixing the rotating shaft. This structure not only ensures the stability of the rotating shaft but also allows operators to easily adjust the position of the rotating shaft by manipulating the retaining ring, thereby precisely controlling the angle and height of the water-retaining umbrella surface.

[0045] As shown in Figures 5(a) and 5(b), the water-blocking umbrella 3 includes an umbrella frame 307 and a waterproof fabric 301. A strong magnet is installed in a groove on the back of the waterproof fabric 301, allowing it to be attached to the umbrella frame through magnetic attraction, thus fixing the waterproof fabric to the umbrella frame 307. This design utilizes magnetic force as a connecting force, simplifying the installation process and improving the sealing and stability of the water-blocking umbrella. As the core component of this device, the water-blocking umbrella is connected to a connecting rod on the base, allowing its lateral width and vertical height to be adjusted according to actual working conditions. This design allows construction personnel to flexibly adjust the water-blocking umbrella according to the tunnel's internal geometry and water inflow conditions, most effectively guiding water flow and protecting workers and equipment from groundwater.

[0046] The umbrella frame includes a first arc-shaped rod and a second arc-shaped rod. The first and second arc-shaped rods are connected from top to bottom by a first horizontal bar 302, a second horizontal bar 303, and a third horizontal bar 304. The first and second horizontal bars are connected by a cross bar 305 and a vertical bar 310. The first horizontal bar 302, the second horizontal bar 303, and the third horizontal bar 304 can all be laterally extended and retracted to adjust the width of the umbrella to adapt to tunnel spaces of different sizes. Specifically, the first horizontal bar 302 and the second horizontal bar 303 are welded at their intersections with the cross bar 305, the vertical bar 310, and the arc-shaped rod 306 to ensure the structure's strength and rigidity. The arc-shaped rod 306 is made of rectangular steel with good toughness, capable of withstanding a certain range of bending without damage, while exhibiting excellent wear resistance and rust resistance.

[0047] In this embodiment, the crossbar adopts a steel rectangular cross-section and is structurally connected to the curved bar through a precise welding process. The surface of the rectangular crossbar is finely polished to present a smooth appearance. This surface treatment not only facilitates the smooth laying of the waterproof fabric but also enhances the adsorption capacity of the built-in strong magnets on the surfaces of the crossbar and curved bar, thereby ensuring that the fabric can be stably fixed under various conditions.

[0048] Furthermore, the curved rod also adopts a steel rectangular cross-section design, which fully considers the material's mechanical properties and its durability in practical applications. The steel selected for the curved rod has excellent toughness, allowing the rod to bend elastically within a certain range, a characteristic that enables it to adapt to varying installation conditions. At the same time, this material also possesses significant wear resistance and corrosion resistance; these characteristics together ensure the stability and reliability of the curved rod during long-term use.

[0049] Furthermore, the crossbars, welded to the two curved bars and the first and second crossbars, enhance the structural rigidity of the entire umbrella frame. This reinforcement is necessary because it prevents the frame from deforming or being damaged under water pressure, ensuring that the water-blocking umbrella can effectively guide water flow and protect construction personnel and equipment.

[0050] Furthermore, a hinge connector 309 is provided at the middle position of the vertical rod. The cross rod 305 is stably hinged to the connecting rod 2 through its hinge connector 309. The hinge connector 309 adopts an existing structure, which allows the water-blocking umbrella surface to be rotated to a certain angle, thus ensuring the water-blocking umbrella surface is in contact with the tunnel wall. At the same time, because the water-blocking umbrella surface is vertically supported by the connecting rod 2, the water-blocking umbrella surface is fixed at a certain angle after it is in contact with the tunnel wall.

[0051] In this embodiment, the connecting rod 2 is designed with two telescopic rectangular steel pipes to adapt to tunnels of different widths and different working conditions. To increase the rigidity of the connecting rod, a short connecting rod is welded between the two steel pipes. This design improves the stability and load-bearing capacity of the entire connecting rod structure.

[0052] In this embodiment, the waterproof fabric 301 is made of multiple layers of highly abrasion-resistant polyester and nylon fibers. This composite material ensures the necessary tensile strength and durability of the waterproof fabric. Its structural design features a unique interlayer in the grooved area, with a powerful magnet embedded within the interlayer. This unique design allows the waterproof fabric to be firmly attached to the crossbars and arc-shaped rods of the supporting structure via magnetic force, thereby maintaining the integrity and sealing effect of the water-blocking system. Furthermore, this design allows for flexible adjustment of the waterproof fabric's attachment position to adapt to different site conditions and installation requirements.

[0053] To enhance its hydrodynamic performance, the waterproof fabric 301 is provided with vertical water-guiding grooves 308. These grooves are pre-processed to form the water-guiding grooves, a design that guides water flow along the groove direction and ensures smooth drainage, preventing groundwater from overflowing from the fabric edges. This effectively reduces the impact force exerted on the fabric by the water flow, mitigates potential wear, and extends the service life of the waterproof fabric. Furthermore, the improved flow path effectively prevents groundwater from overflowing from the side edges of the waterproof fabric, thus maintaining the integrity of the water-blocking structure and ensuring its optimal water-blocking performance.

[0054] The adjustable water-blocking device provided in this embodiment is used as follows:

[0055] The first step is to assemble the water-blocking canopy and connecting rods, and then secure them to the base. This step is fundamental to establishing an effective water-blocking system. Next, use cross bolts to firmly install the entire device onto the working platform of the drilling rig. These cross bolts likely refer to bolts with a cross-shaped structure, used to enhance the stability of the connection between the device and the working platform.

[0056] Next, the length and angle of the connecting rods were adjusted according to the specific construction requirements and tunnel diameter. This adjustment ensured that the water-blocking device could adapt to tunnel spaces of different sizes and shapes, as well as different construction needs.

[0057] During tunnel construction, water-blocking devices are fixed at appropriate locations based on the specific location of water inflow. For arch shoulders with large water inflows, two water-blocking devices can be installed at corresponding positions on the upper and lower working platforms to more effectively guide groundwater towards the bottom of the tunnel and then to the surface. This arrangement can cope with different water inflow situations encountered during construction, providing flexible solutions and ensuring the safety of construction personnel and construction efficiency.

[0058] By incorporating water-blocking devices, the negative impacts of tunnel seepage and sudden water inrushes on the construction environment can be effectively reduced, ensuring workers can operate in relatively dry conditions. This design not only improves work efficiency but also reduces safety risks such as falls that may occur in slippery environments. Furthermore, the water-blocking devices help slow down the corrosion of construction equipment by moisture, thereby extending the equipment's lifespan. This allows construction workers to focus more on tasks such as drilling, reducing frequent downtime caused by water-related problems and improving overall construction efficiency.

[0059] Example 2

[0060] In a typical embodiment of the present invention, a tunnel drilling platform is provided, including the adjustable water-blocking device described in Example 1, such as... Figure 6 As shown, the base of the adjustable water-blocking device is fixed on the tunnel drilling platform, and multiple adjustable water-blocking devices are provided.

[0061] Example 3

[0062] In a typical embodiment of the present invention, a method for using an adjustable water-blocking device is provided, comprising:

[0063] Assemble the water-blocking umbrella surface by firmly fixing the waterproof cloth to the umbrella frame; then, connect and fix the water-blocking umbrella surface to the connecting rod by hinge; next, anchor the base to the working platform using cross bolts; after the base is fixed, insert the connecting rod into the reserved groove of the rotating shaft, and adjust the angle and length of the connecting rod according to the construction requirements and the tunnel diameter to ensure that the water-blocking umbrella surface fits tightly against the tunnel wall;

[0064] Meanwhile, the width of the water-blocking umbrella can be adjusted by telescopic crossbars according to the area and location of the water inrush area to adapt to different working conditions; for large-area water inrush cracks, multiple water-blocking devices can be deployed on the same working platform for parallel use.

[0065] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An adjustable water-blocking device for a tunnel drilling platform, characterized in that, It includes a base, a connecting rod, and a water-blocking umbrella surface. The water-blocking umbrella surface is supported by one end of the connecting rod, and the other end of the connecting rod is mounted on the base via a rotating shaft. The connecting rod can be rotated to adjust its angle. The connecting rod is a telescopic structure. The angle and height of the water-blocking umbrella surface can be adjusted by adjusting the angle and height of the connecting rod. The base is installed on the tunnel drilling platform, and the water-blocking umbrella faces the groundwater flow towards the bottom of the tunnel. The water-blocking umbrella canopy includes an umbrella frame and a waterproof fabric. The waterproof fabric is installed on the umbrella frame by magnetic attraction. The umbrella frame includes a first arc-shaped rod and a second arc-shaped rod. The first arc-shaped rod and the second arc-shaped rod are connected from top to bottom by a first horizontal bar, a second horizontal bar, and a third horizontal bar. The first horizontal bar and the second horizontal bar are connected by a cross bar and a vertical bar. The first horizontal bar, the second horizontal bar, and the third horizontal bar can all extend and retract laterally.

2. The adjustable water-blocking device for a tunnel drilling platform as described in claim 1, characterized in that, The rotating shaft includes a rotating collar, a rotating shaft body, a retaining ring, and a fixing rod. The end of the connecting rod extends into the rotating shaft body, and the end of the connecting rod is provided with a fixing hole. The fixing rod is disposed in the rotating shaft body and passes through the fixing hole. The rotating shaft body is disposed in the rotating collar, and the rotating shaft body and the rotating collar are fixed by the retaining ring.

3. The adjustable water-blocking device for a tunnel drilling platform as described in claim 2, characterized in that, The retaining ring has a semi-circular structure with protrusions at both ends. The protrusions cooperate with the grooves on the rotating shaft ring, and the internal teeth on the retaining ring mesh with the external teeth on the rotating shaft.

4. The adjustable water-blocking device for a tunnel drilling platform as described in claim 1, characterized in that, The base is a plate structure with bolt holes to accommodate cross bolts, which are fixed to the steel mesh of the rock drilling platform.

5. The adjustable water-blocking device for a tunnel drilling platform as described in claim 1, characterized in that, A hinged connector is provided at the middle position of the vertical rod, and the cross rod is connected to the end of the connecting rod through the hinged connector.

6. The adjustable water-blocking device for a tunnel drilling platform as described in claim 1, characterized in that, The waterproof fabric is made of multiple layers of high abrasion-resistant polyester and nylon fibers, and vertical water-guiding grooves are provided on the waterproof fabric.

7. A tunnel drilling platform, comprising an adjustable water-blocking device as described in any one of claims 1-6, characterized in that, The base of the adjustable water-blocking device is fixed on the tunnel drilling platform, and multiple adjustable water-blocking devices are provided.

8. A method of using the adjustable water-blocking device as described in any one of claims 2-6, characterized in that, include: Assemble the water-blocking umbrella canopy and securely fix the waterproof fabric to the umbrella frame; Subsequently, the water-blocking umbrella surface is connected and fixed to the connecting rod via a hinge; next, the base is anchored to the working platform using cross bolts; after the base is fixed, the connecting rod is embedded into the reserved groove of the rotating shaft. According to the construction requirements and the tunnel diameter, the angle and length of the connecting rod are adjusted to ensure that the water-blocking umbrella surface fits tightly against the tunnel wall. Meanwhile, the width of the water-blocking umbrella can be adjusted by telescopic crossbars according to the area and location of the water inrush area to adapt to different working conditions; for large-area water inrush cracks, multiple water-blocking devices can be deployed on the same working platform for parallel use.

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