Slurry shield device and using method thereof

Abstract

The invention discloses a slurry shield device and a using method thereof, and belongs to the technical field of tunnel construction, and the slurry shield device comprises a containing box, a slurry cabin, a first conveying pipeline, a machining mechanism, a second conveying pipeline and a cutter head. The containing box is provided with a feeding opening communicating with the inner space, and the feeding opening is used for feeding muddy water materials into the containing box. The slurry cabin is used for accommodating initial slurry; the first conveying pipeline is used for conveying initial slurry in the slurry cabin to the accommodating box; the processing mechanism is used for processing the muddy water material entering the charging hole and the initial slurry in the accommodating box into standard slurry; the second conveying pipeline is used for conveying the standard slurry in the accommodating box to the slurry cabin; the cutterhead is arranged in the muddy water cabin and used for laying the standard slurry in the muddy water cabin to a tunnel face to form a mud film. The slurry shield device is adopted in the using method of the slurry shield device.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and in particular to a slurry shield device and a method of using the same. Background Art

[0002] In the field of tunnel engineering construction, slurry shield machines have become key equipment for projects such as urban rail transit and cross-river tunnels because of their ability to balance ground pressure through mud and adapt to complex water-rich formations.

[0003] In scenarios such as cabin opening, mud replacement, and emergency construction using slurry shield technology, when the shield machine needs to open the cabin for maintenance due to tool wear or equipment failure, the mud in the slurry cabin needs to be replaced to stabilize the tunnel face.

[0004] The traditional process uses a ground mud pool to mix high-index mud and transports it to the tunnel face through long-distance pipelines. This process not only consumes a large amount of materials such as bentonite and replaces the old mud in the ground pool and along the pipeline, resulting in high material costs for a single operation, but also the long-distance transportation makes mud replacement time-consuming and difficult to quickly form an effective mud film, posing a safety hazard of collapse due to imbalance in formation pressure. Summary of the Invention

[0005] The purpose of the present invention is to provide a slurry shield device and its use method to solve the technical problems in the prior art of mixing new slurry in a ground mud pool and then using mud circulation to replace the mud on the tunnel face, which is high in cost, low in replacement efficiency and poor in mud film quality.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] In one aspect, the present invention provides a slurry shield device, comprising:

[0008] The container has a feeding port connected to the internal space, and the feeding port is used to put muddy and water materials into the container;

[0009] Mud and water tank, used to contain initial slurry;

[0010] a first conveying pipe, communicating with the accommodating box and the mud and water tank, and being used for conveying the initial slurry in the mud and water tank to the accommodating box;

[0011] A processing mechanism, used for processing the muddy and water materials entering the feeding port and the initial slurry in the containing box into a standard slurry;

[0012] a second conveying pipe, communicating with the accommodating box and the mud and water tank, and being used for conveying the standard slurry in the accommodating box to the mud and water tank;

[0013] The cutterhead is arranged in the mud and water tank and is used to spread the standard slurry in the mud and water tank to the tunnel face to form a mud film.

[0014] Preferably, the containing box further includes a return port, a feeding loop is formed between the return port and the feeding port, the processing mechanism includes a shear pump, the shear pump is arranged in the feeding loop, the shear pump can suck the initial slurry in the containing box into the feeding loop, and mix and dissolve the initial slurry and the mud and water material to form the standard slurry.

[0015] Preferably, the slurry shield device further includes an external water mechanism, which is connected to the containing box and is used to inject water into the containing box.

[0016] Preferably, the second delivery pipeline is equipped with a mud pump, and the mud pump is used to deliver the standard slurry in the containing box to the mud and water tank.

[0017] Preferably, the second delivery pipeline is provided with a one-way valve.

[0018] Preferably, one side of the accommodating box is connected to the feeding port, and the other side opposite to the feeding port is connected to the second conveying pipe. From the feeding port to the second conveying pipe, the bottom of the accommodating box extends obliquely from top to bottom.

[0019] Preferably, the storage box is provided with an operating opening, and the operating opening is provided with an openable and closable operating door.

[0020] Preferably, a sampling port communicating with the internal space is provided on the upper side of the accommodating box, and the sampling port is provided with a first opening and closing blocking cover.

[0021] Preferably, an emptying port communicating with the internal space is provided on the lower side of the accommodating box, and the emptying port is provided with a second opening and closing blocking cover.

[0022] On the other hand, the present invention also provides a method for using a slurry shield device, using the above-mentioned slurry shield device, comprising:

[0023] S1. The initial slurry in the mud and water tank is transported to the containing tank through the first transport pipeline until the initial slurry in the containing tank reaches a preset liquid level;

[0024] S2. Add muddy and water materials into the containing box through the feeding port, and process the muddy and water materials and the initial slurry into a standard slurry through the processing mechanism;

[0025] S3. delivering the standard slurry in the accommodating tank to the mud and water tank through the second delivery pipeline until the standard slurry in the mud and water tank reaches the target liquid level;

[0026] S4. Drive the cutterhead to spread the standard slurry in the mud and water tank to the tunnel face to form a mud film.

[0027] Beneficial effects of the present invention:

[0028] The slurry shield device proposed in the present invention, when in use, first, conveys the initial slurry in the slurry tank to the containing box through the first conveying pipe until the initial slurry in the containing box reaches a preset liquid level; then, adds slurry material into the containing box through the feeding port, and processes the slurry material and the initial slurry into standard slurry through the processing mechanism; then, conveys the standard slurry in the containing box to the slurry tank through the second conveying pipe until the standard slurry in the slurry tank reaches the target liquid level; finally, drives the cutter head to spread the standard slurry in the slurry tank to the tunnel face to form a mud film.

[0029] The slurry shield device introduces the existing initial slurry in the slurry tank into the holding box as the basic slurry through the first conveying pipe. It only needs to add an appropriate amount of slurry material through the feeding port, and after sufficient mixing by the processing mechanism, a standard slurry that meets the performance indicators can be formed. This design avoids the waste of resources caused by discarding existing slurry in traditional processes. The short-distance pipeline connection between the holding box and the slurry tank greatly shortens the slurry transmission path. Combined with the efficient mixing effect of the processing mechanism, the standard slurry can be quickly prepared and transported. The entire replacement process is completed in a closed loop inside the shield equipment, eliminating the time loss caused by long-distance pipeline transportation and shortening the cabin opening preparation cycle. The second conveying pipe transports the standard slurry to the slurry tank in a directionally controlled manner. Combined with the rotation of the cutterhead, the standard slurry evenly penetrates the pores of the soil layer on the face, thereby forming a dense and stable mud film, effectively improving the support strength of the face and ensuring the safety of personnel entering the cabin. In summary, the slurry shield device realizes the functional integration of slurry extraction, processing and laying in a limited space through the coordinated cooperation of various components, which not only avoids the waste of resources caused by long-distance pipeline replacement, but also eliminates the problem of transmission attenuation of slurry performance between the ground and the tunnel in traditional processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the principle of a slurry shield device provided in the first embodiment of the present invention;

[0031] Figure 2 is a top view of the accommodation box provided in Example 1 of the present invention;

[0032] Figure 3 is a first cross-sectional view of the accommodation box provided in the first embodiment of the present invention;

[0033] Figure 4 is a second cross-sectional view of the accommodation box provided in the first embodiment of the present invention;

[0034] Figure 5 It is a third cross-sectional view of the accommodation box provided in the first embodiment of the present invention.

[0035] In the picture:

[0036] 100. Palm surface;

[0037] 1. Container; 11. Feeding port; 12. Return port; 13. Operation port; 14. Sampling port; 15. Drain port; 16. Ladder; 2. Mud and water tank; 3. First conveying pipeline; 4. Processing mechanism; 41. Feeding circuit; 42. Shear pump; 5. Second conveying pipeline; 51. Mud pump; 52. One-way valve; 6. Cutter head; 7. External water mechanism. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0039] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0042] Example 1

[0043] See also Figures 1 to 5The mud shield device provided by the embodiment of the present invention includes a container 1, a mud tank 2, a first conveying pipe 3, a processing mechanism 4, a second conveying pipe 5 and a cutter head 6. The container 1 has a feeding port 11 connected to the internal space, and the feeding port 11 is used to feed mud and water materials into the container 1; the mud tank 2 is used to accommodate initial slurry; the first conveying pipe 3 connects the container 1 and the mud tank 2, and is used to convey the initial slurry in the mud tank 2 to the container 1; the processing mechanism 4 is used to process the mud and water materials entering the feeding port 11 and the initial slurry in the container 1 to form a standard slurry; the second conveying pipe 5 connects the container 1 and the mud tank 2, and is used to convey the standard slurry in the container 1 to the mud tank 2; the cutter head 6 is arranged in the mud tank 2, and is used to spread the standard slurry in the mud tank 2 to the tunnel face 100 to form a mud film.

[0044] The slurry shield device proposed in the present invention, when in use, first, conveys the initial slurry in the slurry tank 2 to the containing box 1 through the first conveying pipe 3 until the initial slurry in the containing box 1 reaches a preset liquid level; then, the slurry material is added to the containing box 1 through the feeding port 11, and the slurry material and the initial slurry are processed into a standard slurry through the processing mechanism 4; then, the standard slurry in the containing box 1 is conveyed to the slurry tank 2 through the second conveying pipe 5 until the standard slurry in the slurry tank 2 reaches the target liquid level; finally, the cutter head 6 is driven to spread the standard slurry in the slurry tank 2 to the tunnel face 100 to form a mud film.

[0045] The slurry shield device introduces the existing initial slurry in the slurry tank 2 into the storage tank 1 as the basic slurry through the first delivery pipe 3. It only needs to add an appropriate amount of slurry material through the feeding port 11, and it can be fully mixed by the processing mechanism 4 to form a standard slurry that meets the performance indicators. This design avoids the waste of resources caused by discarding existing slurry in traditional processes. The short-distance pipeline connection between the storage tank 1 and the slurry tank 2 greatly shortens the slurry transmission path. With the efficient mixing effect of the processing mechanism 4, the standard slurry can be quickly prepared and transported. The entire replacement process is completed in a closed loop inside the shield equipment, eliminating the time loss caused by long-distance pipeline transportation and shortening the cabin opening preparation cycle. The second delivery pipe 5 transports the standard slurry to the slurry tank 2 in a directionally controlled manner. Combined with the rotational movement of the cutter head 6, the standard slurry evenly penetrates into the pores of the soil layer of the face 100, thereby forming a dense and stable mud film, effectively improving the support strength of the face 100 and ensuring the safety of personnel entering the cabin. In summary, the slurry shield device realizes the functional integration of slurry extraction, processing and laying in a limited space through the coordinated cooperation of various components, which not only avoids the waste of resources caused by long-distance pipeline replacement, but also eliminates the problem of transmission attenuation of slurry performance between the ground and the tunnel in traditional processes.

[0046] The specific structure of the slurry shield device is described below.

[0047] The container 1 is used to contain muddy and watery materials, marking slurry and other materials. The container 1 has a feeding port 11 communicating with the inner space, and the feeding port 11 is used to put muddy and watery materials into the container 1.

[0048] Optionally, the diameter of the feeding port 11 gradually decreases from top to bottom and extends in a funnel shape, so that when the muddy and watery materials are added into the containing box 1, the muddy and watery materials can slide into the containing box 1 more smoothly, effectively avoiding the spillage and accumulation of the muddy and watery materials on the edge of the feeding port 11 during the addition process, thereby improving the efficiency and accuracy of feeding and reducing the waste of materials that may be caused by spillage.

[0049] Furthermore, the storage tank 1 also includes a return port 12, and a feeding loop 41 is formed between the return port 12 and the feeding port 11. The processing mechanism 4 includes a shear pump 42, which is arranged in the feeding loop 41. The shear pump 42 can suck the initial slurry in the storage tank 1 into the feeding loop 41, and mix and dissolve the initial slurry with the muddy material to form a standard slurry. When in use, the initial slurry in the muddy tank 2 is first transported to the storage tank 1 through the first conveying pipe 3, and then the muddy material is added from the feeding port 11. At the same time, the shear pump 42 is started, and the initial slurry already in the storage tank 1 is sucked into the feeding loop 41. In the loop, the initial slurry and the muddy material are fully mixed and dissolved under the action of the shear pump 42, and finally a standard slurry is formed.

[0050] The closed-loop flow path formed by the feeding circuit 41 allows the initial slurry and muddy water materials to pass through the action area of the shear pump 42 multiple times, thereby enhancing the mixing intensity and shortening the dissolution time. This dynamic circulation mode can avoid blockage of the feeding port 11, maintain the patency of the feeding circuit 41, and adapt to the vibration working conditions of the shield machine.

[0051] Optionally, a first delivery pipe 3 is disposed between the upper side of the storage tank 1 and the upper side of the mud and water tank 2. When the first delivery pipe 3 is connected, the initial slurry in the mud and water tank 2 is transported to the storage tank 1 through the first delivery pipe 3 due to the liquid level difference, and serves as the base slurry for mixing with the standard slurry. This method of transporting the initial slurry based on the liquid level difference does not require additional complex power equipment; it can be transported solely by relying on the natural liquid level difference, simplifying the device structure and reducing equipment costs and energy consumption. In addition, transporting the initial slurry using the liquid level difference is relatively smooth, which can reduce disturbances to the initial slurry and prevent changes in the composition of the slurry due to excessive disturbances.

[0052] The first delivery pipeline 3 is provided with a control valve for controlling the connection or closure of the first delivery pipeline 3 .

[0053] Furthermore, the slurry shield apparatus includes an external water mechanism 7, which is connected to the containing tank 1 and is used to inject water into the containing tank 1. When the processing mechanism 4 mixes the initial slurry with the slurry material, if the slurry has too high viscosity or insufficient fluidity, an appropriate amount of clean water can be injected through the external water mechanism 7 to optimize the slurry performance by adjusting the water content to meet the performance indicators of standard slurry. After the slurry replacement operation is completed, the external water mechanism 7 can be used to inject water into the empty containing tank 1, cooperating with the operation of the processing mechanism 4 to automatically flush the inner wall of the containing tank 1 and the feeding circuit 41.

[0054] Optionally, the external water mechanism 7 includes a water tank, a water supply pipeline, a water pump and a flow regulating valve. The water tank is placed near the storage tank 1 and is used to store water. One end of the water supply pipeline is connected to the bottom of the water tank, and the other end is connected to the water inlet of the storage tank 1. The water supply pipeline is made of pressure-resistant and corrosion-resistant materials to ensure a safe and stable water supply process. The water pump is installed on the water supply pipeline. A centrifugal pump is selected. The impeller is driven by a motor to rotate at high speed, forming a vacuum at the water inlet, thereby sucking the water in the water tank and pressing it into the storage tank 1. The flow regulating valve is arranged on the water supply pipeline between the water pump and the storage tank 1. By adjusting the valve opening, the water flow entering the storage tank 1 can be accurately controlled.

[0055] In other embodiments, the external water mechanism 7 can also be implemented by a plunger pump, a nozzle or other mechanisms. The implementation form is not limited here, as long as it can achieve the above-mentioned effects.

[0056] Preferably, a sampling port 14 connected to the internal space is provided on the upper side of the storage box 1, and the sampling port 14 is provided with a first sealing cover that can be opened and closed. In the process of preparing the standard slurry, when it is necessary to sample and test the slurry in the storage box 1, the operator first opens the first sealing cover, and uses a professional sampling tool to reach into the storage box 1 through the sampling port 14 to obtain a slurry sample. After the sampling is completed, the first sealing cover is closed to restore the closed state of the storage box 1. The operator can test the viscosity, specific gravity and other indicators of the obtained slurry sample, and adjust the amount of mud and water material added or the processing technology in time according to the test results to ensure that the final standard slurry meets the construction requirements, thereby ensuring the formation of a high-quality mud film on the face 100 and improving the quality and safety of the slurry shield operation. At the same time, the openable and closable first sealing cover can keep the storage box 1 closed when no sampling is taking place, preventing debris from entering and affecting the quality of the slurry, and also avoiding slurry leakage causing environmental pollution or waste.

[0057] After the mud shield device mixes and processes the mud material and the initial slurry to form standard slurry through the feeding circuit 41, the shear pump 42 and the external water mechanism 7, the standard slurry in the containing box 1 needs to be transported to the mud tank 2 through the second conveying pipeline 5.

[0058] Specifically, the second delivery pipe 5 is equipped with a mud pump 51, which is used to deliver the standard slurry in the storage tank 1 to the mud and water tank 2. When the standard slurry prepared in the storage tank 1 needs to be delivered to the mud and water tank 2, the mud pump 51 configured on the second delivery pipe 5 is started. The mud pump 51 starts working, first using suction to suck the standard slurry in the storage tank 1 into the pump chamber, and then through the thrust generated by the rotation of the impeller or the movement of the piston, the standard slurry continues to flow along the second delivery pipe 5 to the mud and water tank 2 under pressure until the standard slurry in the mud and water tank 2 reaches the target liquid level. The provision of the mud pump 51 enhances the delivery efficiency and controllability of the standard slurry, can accurately adjust the delivery speed and flow rate according to construction requirements, and quickly and stably deliver the standard slurry to the mud and water tank 2, meeting the requirements for timely supply of standard slurry in different construction scenarios.

[0059] In other embodiments, the second conveying pipeline 5 can also realize the conveying process of the standard slurry in the containing box 1 through a compressed air conveyor, a screw conveyor, etc., which is not limited here.

[0060] Preferably, the second delivery pipeline 5 is equipped with a one-way valve 52. When the mud pump 51 delivers standard slurry to the mud and water tank 2 through the second delivery pipeline 5, the one-way valve 52 automatically opens under the positive pressure of the standard slurry, allowing the standard slurry to flow smoothly into the mud and water tank 2. When the mud pump 51 stops operating or the pressure in the mud and water tank 2 exceeds the delivery pressure, the one-way valve 52 immediately closes due to the reverse pressure. The mechanical locking property of the one-way valve 52 effectively prevents the slurry in the mud and water tank 2 from flowing back into the second delivery pipeline 5, avoiding the phenomenon of pipeline emptying caused by slurry backflow, ensuring the continuity of subsequent delivery operations, and preventing impurities in the mud and water tank 2 from backflowing and contaminating the standard slurry, thereby ensuring the stability of the slurry performance.

[0061] In addition, an emptying port 15 communicating with the internal space is provided on the lower side of the container 1, and the emptying port 15 is provided with a second sealing cover that can be opened and closed. After the hatch opening operation is completed, if there is any slurry remaining in the container 1, the operator manually opens the second sealing cover, and under the action of gravity, the excess slurry in the container 1 flows out along the emptying port 15. After the slurry is discharged, the second sealing cover is closed to prevent foreign matter from entering the container 1. By discharging the residual slurry in time, the sedimentation and solidification of the mud in the container 1 is avoided, which not only keeps the interior of the container 1 clean, but also prevents the solidification of the mud from affecting the processing and transportation functions of the container 1 for the slurry in subsequent operations.

[0062] Preferably, one side of the container 1 is connected to the feed port 11, and the other side opposite the feed port 11 is connected to the second conveying pipe 5. The bottom of the container 1 extends obliquely from top to bottom in the direction from the feed port 11 to the second conveying pipe 5. The inclined bottom facilitates the flow of the standard slurry along the inclined surface of the bottom of the container 1 toward the second conveying pipe 5 under the action of gravity, reducing the residual standard slurry in the container 1 and ensuring that the standard slurry can be fully and smoothly transported to the mud and water tank 2 to avoid waste. At the same time, it avoids the dead corners of material accumulation that are common at the bottom of a horizontal container, ensures the thorough emptying of the slurry in the container 1, and prevents the solidification and hardening of the residue.

[0063] Furthermore, the container 1 is provided with an access opening 13, which is equipped with an openable and closable operating door. When maintenance, inspection, or cleaning operations are required within the container 1, the operator opens the operating door and enters the container 1 through the access opening 13 to perform the relevant work. After completing the operation, the operator closes the operating door, restoring the container 1 to its closed state.

[0064] Preferably, the accommodating box 1 is further provided with a ladder 16 to facilitate operators to operate on the accommodating box 1 .

[0065] After the second delivery pipeline 5 delivers the processed standard slurry to the mud and water tank 2, the cutter head 6 located in the mud and water tank 2 spreads the standard slurry in the mud and water tank 2 to the tunnel face 100 to form a mud film.

[0066] Example 2

[0067] The embodiment of the present invention further provides a method for using a slurry shield device, using the slurry shield device provided in the first embodiment, and the method specifically includes:

[0068] S1. The initial slurry in the mud and water tank 2 is transported to the containing tank 1 through the first transport pipe 3 until the initial slurry in the containing tank 1 reaches a preset liquid level.

[0069] In this step, first, confirm that the connection parts of the first delivery pipeline 3 connecting the upper side of the accommodating box 1 and the upper side of the mud and water tank 2 are well sealed, there is no risk of leakage, and the control valve of the first delivery pipeline 3 is in an openable state.

[0070] Afterwards, the control valve connected to the first delivery pipe 3 is opened to connect the first delivery pipe 3. Since the liquid level of the initial slurry in the mud and water tank 2 is higher than the liquid level in the containing tank 1, the initial slurry begins to flow from the mud and water tank 2 to the containing tank 1 under the pressure generated by the liquid level difference.

[0071] During the transportation process, the liquid level change of the initial slurry in the accommodating box 1 is monitored in real time by equipment such as a liquid level monitoring device.

[0072] When the liquid level monitoring device feeds back that the initial slurry in the accommodating box 1 reaches the preset liquid level, the control valve of the first conveying pipeline 3 is closed to stop the conveying of the initial slurry.

[0073] S2. Add muddy and watery materials into the accommodating box 1 through the feeding port 11, and process the muddy and watery materials and the initial slurry into a standard slurry through the processing mechanism 4.

[0074] In this step, an appropriate amount of muddy water material is prepared and transported to the vicinity of the feeding port 11 of the accommodating box 1 .

[0075] Open the feeding port 11 . Since the feeding port 11 is funnel-shaped, slowly pour the muddy and watery materials into the feeding port 11 so that the muddy and watery materials can slide smoothly into the interior of the accommodating box 1 .

[0076] The shear pump 42 in the processing mechanism 4 is started, and the shear pump 42 begins to work, sucking the initial slurry in the accommodating box 1 into the feeding loop 41 formed by the return port 12 and the feeding port 11.

[0077] In the feeding loop 41, the initial slurry and the newly added muddy material are fully mixed under the action of the shear pump 42. The shear pump 42 stirs and shears the slurry and material through high-speed rotating components, causing them to merge and dissolve with each other.

[0078] At the same time, the valve on the water supply pipeline connecting the water storage tank and the receiving box 1 in the external water mechanism 7 is opened, and the water pump is started. The water pump draws water from the water storage tank and presses it into the receiving box 1. By adjusting the opening of the flow regulating valve, the water flow entering the receiving box 1 is precisely controlled, thereby adjusting the water content of the slurry and optimizing the slurry performance.

[0079] Afterwards, the operator opens the first sealing cover and uses a specialized sampling tool to reach into the interior of the container 1 through the sampling port 14 to obtain a slurry sample. After sampling, the first sealing cover is closed again, restoring the container 1 to its sealed state. The sample is then tested for viscosity, specific gravity, and other indicators. If the test results show that the slurry's indicators meet the requirements, the shear mixing operation is stopped. The slurry formed in the container 1 is now a standard slurry and can be used for subsequent work. If the test results show that the slurry's indicators do not meet the requirements, the above operation is repeated to adjust the slurry's indicators until they meet the requirements.

[0080] S3. The standard slurry in the accommodating tank 1 is delivered to the mud and water tank 2 through the second delivery pipe 5 until the standard slurry in the mud and water tank 2 reaches the target liquid level.

[0081] In this step, the mud pump 51 disposed on the second delivery pipe 5 is started. The mud pump 51 begins operation by first sucking the standard slurry in the holding tank 1 into the pump chamber using suction. Subsequently, the standard slurry is continuously flowed under pressure along the second delivery pipe 5 toward the mud and water tank 2 through the thrust generated by the rotation of the impeller or the movement of the piston.

[0082] Afterwards, it is determined whether the standard slurry in the mud and water tank 2 has reached the target liquid level. If not, steps S1 to S3 are repeated until the standard slurry in the mud and water tank 2 has reached the target liquid level.

[0083] S4. Drive the cutterhead 6 to spread the standard slurry in the mud and water tank 2 to the tunnel face 100 to form a mud film.

[0084] In this step, first check the connection between the cutter head 6 and the mud and water tank 2 to ensure that the cutter head 6 is firmly installed and all components are ready.

[0085] Afterwards, the drive device of the cutterhead 6 is started, and the cutterhead 6 begins to rotate in the mud and water tank 2. As the cutterhead 6 rotates, its surface contacts the standard slurry in the mud and water tank 2, and the standard slurry is evenly applied and pushed to the tunnel face 100.

[0086] The cutterhead 6 continuously rotates, allowing the standard slurry to gradually penetrate the pores of the soil layer at the tunnel face 100. Over time, a dense and stable mud film gradually forms on the tunnel face 100. During the operation of the cutterhead 6, the formation of the mud film on the tunnel face 100 is continuously monitored to ensure that the mud film evenly and completely covers the tunnel face 100.

[0087] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A slurry shield device, characterized in that: include: The accommodating box (1) has a feeding port (11) communicating with the internal space, and the feeding port (11) is used to feed muddy and watery materials into the accommodating box (1); A mud and water tank (2), used for containing initial slurry; A first conveying pipe (3) is connected between the accommodating box (1) and the mud and water tank (2), and is used to convey the initial slurry in the mud and water tank (2) to the accommodating box (1); A processing mechanism (4) is used to process the muddy and water materials entering the feeding port (11) and the initial slurry in the accommodating box (1) into a standard slurry; A second delivery pipe (5) is connected between the accommodating box (1) and the mud and water tank (2), and is used to deliver the standard slurry in the accommodating box (1) to the mud and water tank (2); The cutterhead (6) is arranged in the mud and water tank (2) and is used to spread the standard slurry in the mud and water tank (2) to the tunnel face (100) to form a mud film.

2. The slurry shield device according to claim 1, characterized in that: The accommodating box (1) also includes a return port (12), and a feeding circuit (41) is formed between the return port (12) and the feeding port (11). The processing mechanism (4) includes a shear pump (42), and the shear pump (42) is arranged in the feeding circuit (41). The shear pump (42) can suck the initial slurry in the accommodating box (1) into the feeding circuit (41), and mix and dissolve the initial slurry and the muddy water material to form the standard slurry.

3. The slurry shield device according to claim 1, characterized in that: The slurry shield device further comprises an external water mechanism (7), which is connected to the accommodating box (1) and is used for injecting water into the accommodating box (1).

4. The slurry shield device according to claim 1, characterized in that: The second delivery pipeline (5) is equipped with a mud pump (51), and the mud pump (51) is used to deliver the standard slurry in the accommodating box (1) to the mud and water tank (2).

5. The slurry shield device according to claim 1, characterized in that: The second delivery pipe (5) is provided with a one-way valve (52).

6. The slurry shield device according to claim 1, characterized in that: One side of the accommodating box (1) is connected to the feeding port (11), and the other side opposite to the feeding port (11) is connected to the second conveying pipe (5). In the direction from the feeding port (11) to the second conveying pipe (5), the bottom of the accommodating box (1) extends obliquely from top to bottom.

7. The slurry shield device according to claim 1, characterized in that: The accommodating box (1) is provided with an operating opening (13), and the operating opening (13) is provided with an operating door that can be opened and closed.

8. The slurry shield device according to claim 1, characterized in that: A sampling port (14) communicating with the internal space is provided on the upper side of the accommodating box (1), and the sampling port (14) is provided with a first sealing cover that can be opened and closed.

9. The slurry shield device according to claim 1, characterized in that: An emptying port (15) communicating with the internal space is provided on the lower side of the accommodating box (1), and the emptying port (15) is provided with a second blocking cover that can be opened and closed.

10. A method for using a slurry shield device, characterized in that: The slurry shield device according to any one of claims 1 to 9 comprises: S1, transporting the initial slurry in the mud and water tank (2) to the containing tank (1) through the first transport pipe (3), until the initial slurry in the containing tank (1) reaches a preset liquid level; S2, adding muddy and watery materials into the accommodating box (1) through the feeding port (11), and processing the muddy and watery materials and the initial slurry into a standard slurry through the processing mechanism (4); S3, delivering the standard slurry in the accommodating box (1) to the mud and water tank (2) through the second delivery pipe (5), until the standard slurry in the mud and water tank (2) reaches the target liquid level; S4. Drive the cutterhead (6) to spread the standard slurry in the mud and water tank (2) to the tunnel face (100) to form a mud film.

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