Servo control sealing device and method for slurry shield tunneling

Abstract

The invention discloses a servo control sealing device and method for a slurry shield tunneling machine, comprising a flexible sealing plate (1), a waterproof sealing pad (2), a servo control system (3) and a tunnel ring (9); the tunnel ring (9) is fixed at the tunnel entrance of the slurry shield machine, the servo control system is arranged on the inner wall of the tunnel ring, one end of the waterproof sealing pad is sealed and connected to the tunnel ring and covers the servo control system, the other end of the waterproof sealing pad is connected to the flexible sealing plate, the waterproof sealing pad can be deformed as the plungers of several groups of servo control systems extend, the flexible sealing plate is located on the inner side of the tunnel ring, so that the flexible sealing plate can be deformed synchronously with the waterproof sealing pad and sealed and attached to the slurry shield machine body and the tunnel pipe segment. The invention can solve the problems of poor reliability of shield tunneling machine tunneling sealing, time-consuming and costly reinforcement, unoptimistic sealing effect, weak device safety, many environmental safety hazards, easy induction of tunnel entrance instability, water leakage and slurry leakage during the construction of the slurry shield tunneling machine in the prior art.

Description

Technical Field

[0001] The present invention relates to a shield tunnel and underground building construction device and method, and in particular to a slurry balance shield tunnel entry servo control sealing device and method. Background Art

[0002] At present, the slurry shield method is increasingly used in the construction of cross-river tunnels. However, in the process of carrying out slurry shield tunneling in the complex underwater geological environment with high pressure water level and widespread sandstone composite strata, insufficient assessment of related risks and lack of safety control plans are still one of the problems that need to be urgently addressed in improving tunnel construction measures.

[0003] The main adverse factors faced by deep buried slurry shield during tunnel entry are: the annular portal gap causes soil collapse, resulting in water and sand flow in the portal, the shield machine head drop caused by the untimely filling and support of the portal gap, the additional soil pressure formed around the tunnel causes the crushing of the pipe segments and the opening of the annular seams and joints, etc. The emergence of these adverse factors will directly cause excessive settlement of the soil around the tunnel structure, seriously affecting the stability of the surrounding strata, and even induce major accidents such as large-scale pipeline rupture and collapse of the ground in the construction area.

[0004] Existing tunnel construction control technologies are mainly divided into two categories: (1) reinforcing the outer soil of the receiving working shaft; and (2) sealing the annular gap at the tunnel entrance. However, due to the varying complexity of geological conditions, significant differences in shield diameter and burial depth, and the difficulty in controlling the quality and effectiveness of construction reinforcement, there are still significant risks and uncertainties in ensuring the safety of slurry shield tunnel construction.

[0005] Generally speaking, the technical problems faced by slurry shield tunneling technology are as follows: (1) There are many uncertain factors affecting the shield tunneling construction, the probability is high, and the control of dangerous situations is difficult; (2) The outside of the receiving working shaft needs to be reinforced on a large scale, which is too costly; (3) The leakage and grouting phenomenon in the tunnel leads to excessive settlement of the stratum and hidden dangers to structural stability; (4) Dewatering operations must be carried out in some areas of the working shaft, which is time-consuming and the dewatering effect is mostly unsatisfactory; (5) A large amount of complex preliminary preparation work is required.

[0006] During the process of the slurry shield passing through the receiving tunnel entrance, there is always a gap with a circular cross-section between the tunnel entrance and the shield, and between the tunnel entrance and the tunnel segments. If no sealing measures are taken, the mud, water, and soil outside the tunnel entrance will flow into the tunnel working shaft through this gap, causing soil collapse at the tunnel entrance, triggering passive instability and deformation of the strata near the tunnel, and destroying the stability of the strata. The negative impact is quite huge. Therefore, the research on the sealing technology of the tunnel entrance gap has always been the focus of the research on slurry shield tunnel construction technology.

[0007] Chinese invention patent ZL202010613668.9 discloses a double airbag sealing device for deep-buried earth pressure balance shield tunneling and a sealing method thereof, and specifically discloses a step-by-step inflatable double high-pressure rubber airbag tunnel opening gap sealing device. Although the sealing device has made some improvements to the airbag inflation and sealing method, and has adopted a method of step-by-step pressurization of the double rubber airbags according to the uneven size of the gaps between the tunnel ring and the shield, and the tunnel ring and the pipe segment, the device cannot control the size of the pressure load in the airbag. For the design working conditions with uneven distribution of lateral earth pressure loads around the shield and the pipe segment, this method cannot timely and effectively adjust the airbag pressure load, which significantly affects the more accurate "soil and water blocking" sealing and filling of the overall circumferential gap of the tunnel ring, affecting the safety of the shield tunneling. In addition, when the construction environment is in a complex environment with deep overburden, high pressure water and sandy silt as the main stratum, since the cave entrance is in a sandy soil layer with weak self-supporting capacity and high fluidity, the strong stress level can easily cause the high-pressure rubber airbag to explode. Therefore, the pressure amplitude that the conventional high-pressure inflatable rubber airbag can provide is no longer sufficient to ensure its own safety, and a stable cave entrance sealing effect cannot be guaranteed.

[0008] Currently, the conventional technology used to seal and stop the tunnel entrance during the reception of large-diameter shield machines under complex working conditions typically utilizes a combination of hoop grouting, airbags, reverse one-way hinged plates, and rubber curtain sheets (also known as "socks") with tensioning devices and steel sealing plates. However, existing shield tunnel entry gap sealing technologies still suffer from poor sealing reliability, time-consuming and costly reinforcement, unsatisfactory sealing results, weak device safety, numerous environmental safety hazards, and the susceptibility to tunnel entrance instability and water and slurry leakage. Summary of the Invention

[0009] The purpose of the present invention is to provide a servo-controlled sealing device and method for a slurry shield tunnel entry, which can solve the problems in the prior art of slurry shield tunnel entry construction, such as poor reliability of shield tunnel entry sealing, time-consuming and costly reinforcement, unsatisfactory sealing effect, weak device safety, many environmental safety hazards, and easy induction of tunnel entrance instability, water leakage, and slurry leakage.

[0010] The present invention is achieved in that:

[0011] A servo control sealing device for a slurry shield machine entering a tunnel comprises a flexible sealing plate, a waterproof sealing pad, a servo control system and a tunnel ring; the tunnel ring is fixed at the tunnel entrance of the slurry shield machine, the servo control system is arranged on the inner wall of the tunnel ring, and a plurality of groups of servo control systems are arranged at intervals along the circumference of the tunnel ring; one end of the waterproof sealing pad is sealingly connected to the tunnel ring and covers the outside of the plurality of groups of servo control systems, the other end of the waterproof sealing pad is connected to the flexible sealing plate, and the waterproof sealing pad can be deformed as the plungers of the plurality of groups of servo control systems extend, and the flexible sealing plate is located on the inner side of the tunnel ring, so that the flexible sealing plate can be deformed synchronously with the waterproof sealing pad and sealed and fitted on the slurry shield machine body and tunnel segments.

[0012] Each group of the servo control system includes two servo jacks, namely the first jack and the second jack arranged in sequence along the propulsion direction of the slurry shield machine, and the plunger of each servo jack is arranged facing the slurry shield machine body and tunnel segments.

[0013] Each of the servo jacks is equipped with a signal transceiver, which is connected to an external control device.

[0014] Side baffles are provided on both sides of the waterproof sealing pad. The side baffles are circular structures and are coaxially arranged between the hole ring and the flexible sealing plate, so that a sealed space can be formed between the flexible sealing plate, the two side baffles and the hole ring. Several groups of servo control systems and waterproof sealing pads are arranged in the sealed space.

[0015] The flexible blocking plate is connected to the side baffle by adhesive bonding, and the bonding force between the flexible blocking plate and the side baffle is smaller than the propulsion force of the servo control system plunger.

[0016] The circular ring width of the side baffle is smaller than the gap width between the tunnel ring and the slurry shield machine body and the gap width between the tunnel ring and the tunnel segment.

[0017] A stiffening plate is provided between the outer side of each side baffle and the hole ring.

[0018] A base bottom plate is fitted on the inner wall of the hole ring, and a waterproof sealing pad, a servo control system, a side baffle and a stiffening plate are all installed on the base bottom plate.

[0019] An adsorption layer is circumferentially installed on the outer side of each side baffle, and the adsorption layer is located between the base bottom plate and the flexible sealing plate.

[0020] A sealing method for a servo-controlled sealing device for a slurry shield tunneling machine includes the following steps:

[0021] Step 1: Before the slurry shield machine enters the tunnel, the plunger of the first jack in each servo control system is extended for the first time, so that the first side of the waterproof sealing pad is deformed, and the first side of the flexible sealing plate is separated from the side baffle and deformed;

[0022] Step 2: When the slurry shield enters the tunnel, the plunger of the first jack in each servo control system is extended for the second time, causing the first side of the flexible sealing plate and the waterproof sealing pad to further deform, and the first side of the flexible sealing plate is sealed against the slurry shield body, thereby sealing the gap between the slurry shield body and the tunnel;

[0023] Step 3: Before the slurry shield machine continues to advance and exposes the tunnel segments, the plunger of the second jack in each servo control system is extended for the first time, causing the second side of the flexible sealing plate and the second side of the waterproof sealing pad to deform;

[0024] Step 4: When the slurry shield machine advances and exposes the tunnel segments, the plunger of the second jack in each servo control system is extended for the second time, so that the second side of the flexible sealing plate and the second side of the waterproof sealing pad are further deformed, and the second side of the flexible sealing plate is sealed and fitted on the tunnel segments to block the gap between the hole ring and the tunnel segments.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention mainly aims at the technical difficulties in the prior art when a slurry shield enters a tunnel for construction, such as high difficulty in sealing technology for the shield, time-consuming and costly reinforcement, poor sealing effect, many hidden dangers in construction safety, easy occurrence of tunnel opening collapse, slurry leakage, soil leakage, water leakage, etc. The present invention improves the sealing method, structural form, gap elimination method and other aspects of the sealing device, and provides a sealing device with flexible servo adjustment, strong controllability and stable pressure, so as to realize reliable sealing of the gaps between the tunnel ring and the slurry shield machine body and between the tunnel ring and the tunnel segments, thereby reducing the disturbance of the surrounding strata caused by the slurry shield entering the tunnel, and can ensure the safety and reliability of the slurry shield entering the tunnel under conditions of large burial depth, complex geological environment and high pressure water level, which has important guiding significance for ensuring the construction safety of the receiving link of the large burial depth slurry shield under river crossing conditions.

[0027] 2. The present invention starts two servo jacks in sequence. The first jack is started to eliminate the gap between the tunnel ring and the slurry shield body, and the second jack is started to eliminate the gap between the tunnel segment and the tunnel ring. At the same time, the servo jacks at different positions can adjust the loading link in real time according to the size of the gap at different parts. The adjustment is flexible and accurate, ensuring that the pressure acting on the slurry shield body and the tunnel segment is relatively stable and appropriate, and further ensuring that the annular gap around the tunnel ring is fully eliminated, thereby ensuring the safety and stability of the bottom layer around the tunnel ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a longitudinal cross-sectional view of the servo control sealing device for the slurry shield tunneling according to the present invention;

[0029] Figure 2 superior Figure 1 The enlarged schematic diagram of the S position in the middle (the jack system is not started); the arrow direction is the forward direction of the slurry shield machine;

[0030] Figure 3 yes Figure 2 Schematic diagram of the structure of the first jack being activated; the arrow direction is the forward direction of the slurry shield machine;

[0031] Figure 4 yes Figure 2 Schematic diagram of the structure in which the first jack and the second jack are both activated; the direction of the arrow is the forward direction of the slurry shield machine.

[0032] In the figure, 1 is a flexible sealing plate, 2 is a waterproof sealing pad, 21 is a first screw, 3 is a servo control system, 301 is a first jack, 302 is a second jack, 31 is a second screw, 4 is a side baffle, 5 is a signal transceiver, 6 is a stiffening plate, 7 is a base bottom plate, 8 is an adsorption layer, and 9 is a hole ring. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Please see the attached Figure 1 To the attached Figure 4A servo control sealing device for a slurry shield tunneling machine includes a flexible sealing plate 1, a waterproof sealing pad 2, a servo control system 3 and a tunnel ring 9; the tunnel ring 9 is fixed at the tunnel entrance of the slurry shield machine, the servo control system 3 is arranged on the inner wall of the tunnel ring 9, and several groups of servo control systems 3 are arranged at intervals along the circumference of the tunnel ring 9; one end of the waterproof sealing pad 2 is sealed and connected to the tunnel ring 9 and covers the outside of several groups of servo control systems 3, the other end of the waterproof sealing pad 2 is connected to the flexible sealing plate 1, and the waterproof sealing pad 2 can be deformed as the plungers of several groups of servo control systems 3 extend, and the flexible sealing plate 1 is located on the inner side of the tunnel ring 9, so that the flexible sealing plate 1 can be deformed synchronously with the waterproof sealing pad 2 and sealed and fitted on the slurry shield machine body and tunnel segments.

[0035] The waterproof sealing pad 2 is deformed as the plungers of several groups of servo control systems 3 extend, and expands toward the center of the hole ring 9. The flexible sealing plate 1 moves synchronously with the extension of the plungers of several groups of servo control systems 3 and the expansion of the waterproof sealing pad 2 until the flexible sealing plate 1 is sealed and fits on the surface of the slurry balance shield body and the tunnel segment. The flexible sealing plate 1 undergoes flexible deformation to ensure reliable wrapping of the slurry balance shield body and the surface of the tunnel segment, ensuring the sealing between the flexible sealing plate 1 and the hole ring 9, thereby realizing effective gap sealing between the hole ring 9 and the slurry balance shield body and the tunnel segment.

[0036] The waterproof sealing gasket 2 effectively seals the servo control system 3, preventing the intrusion of mud, water, and soil. While protecting the servo control system 3, it also restrains the plunger of the servo control system 3, ensuring the effective propulsion of the servo control system 3. The waterproof sealing gasket 2 can be fixed to the hole ring 9 using a first screw 21.

[0037] Preferably, the flexible sealing plate 1 can be made of rubber material, has a certain elasticity, can produce deformation and deform under the extension of the servo control system 3 plunger and the expansion of the waterproof sealing pad 2 and adhere to the slurry shield body or tunnel segment, and ensure that the fitting part has good sealing performance.

[0038] Preferably, the waterproof sealing pad 2 can adopt a hollow high-toughness waterproof rubber pad body with flexible elasticity and deformation ability; the waterproof sealing pad 2 is compressed when constrained by the flexible sealing plate 1 and the hole ring 9, and can rapidly expand and deform toward the center direction of the hole ring 9 under the extension of the plunger of the servo control system 3, thereby sealing and filling the gap to achieve a reliable sealing effect.

[0039] Each group of the servo control system 3 includes two servo jacks, namely a first jack 301 and a second jack 302 arranged in sequence along the propulsion direction of the slurry shield machine, and the plunger of each servo jack is arranged facing the slurry shield machine body and the tunnel segment.

[0040] Preferably, the servo jacks are fixedly mounted on the tunnel ring 9 using a second screw 31. These servo jacks can employ conventional servo-controlled jacking devices to precisely control the plunger's extension distance, thereby ensuring effective sealing of gaps of varying widths between the tunnel ring 9 and the slurry shield body and tunnel segments. Each servo jack is connected to a power system line access conduit (not shown), and the tunnel ring 9 also includes a channel for power system line access to ensure the proper operation of the servo jacks.

[0041] Each of the servo jacks is equipped with a signal transceiver 5, which is connected to an external control device.

[0042] Preferably, the signal transceiver 5 can be a conventional wireless signal transceiver, and the control device can be a conventional computer, with control components configured on the control device to match the wireless signal transceiver. The signal transceiver 5 receives operating instructions from the control device in real time via the wireless network, thereby achieving the extension of the servo jack plunger. Each set of two servo jacks can be controlled independently or in conjunction, enabling random loading and unloading and adjustment of the continuous load, providing more flexible and precise control.

[0043] The servo control system 3 has a high degree of automation and intelligence, strong adaptability, and a compact appearance. It can continuously and stably provide pressure to the slurry shield body and the surface of the tunnel segment, and can adjust the size of the plunger pressure in real time according to the size of the gap, thereby effectively eliminating the gap between the tunnel ring 9 and the slurry shield body, and the tunnel ring 9 and the tunnel segment, thereby achieving a sealing effect.

[0044] Side baffles 4 are provided on both sides of the waterproof sealing pad 2. The side baffles 4 are circular structures and are coaxially arranged between the hole ring 9 and the flexible sealing plate 1, so that a sealed space can be formed between the flexible sealing plate 1, the two side baffles 4 and the hole ring 9. Several groups of servo control systems 3 and waterproof sealing pads 2 are arranged in the sealed space.

[0045] When the servo control system 3 is not activated, the two side baffles 4 constrain the initial installation position of the flexible sealing plate 1 and the initial shape of the waterproof sealing pad 2, preventing interference with the slurry shield machine's advancement into the tunnel. This not only protects the waterproof sealing pad 2 and servo control system 3, but also effectively blocks slurry and soil water from flowing into the tunnel entrance. Preferably, the side baffles 4 can be made of steel plate for high strength.

[0046] The flexible sealing plate 1 is connected to the side baffle 4 by adhesive bonding, and the bonding force between the flexible sealing plate 1 and the side baffle 4 is smaller than the propulsion force of the plunger of the servo control system 3 .

[0047] By sticking the flexible rubber sheet 1 and the two side baffles 4 together, the waterproof sealing pad 2 and the unactivated servo control system 3 are constrained and limited. However, after the servo control system 3 is started, several groups of servo control systems 3 can push the flexible rubber sheet 1 away from the side baffles 4, so that the flexible rubber sheet 1 and the waterproof sealing pad 2 can achieve the function of sealing the gap.

[0048] The circular width of the side baffle 4 is smaller than the gap width between the hole ring 9 and the slurry shield machine body and the gap width between the hole ring 9 and the tunnel segment, ensuring that the flexible rubber plate 1 does not affect the passage of the slurry shield machine after being installed through the side baffle 4.

[0049] A stiffening plate 6 is provided between the outer side of each side baffle 4 (ie the side away from the waterproof sealing pad 2 ) and the hole ring 9 .

[0050] Preferably, the stiffening plate 6 can be made of a right-angled triangular steel plate with high strength, thereby ensuring the structural stability of the side baffle 4 and enhancing the connection strength between the side baffle 4 and the hole ring 9.

[0051] A base bottom plate 7 is fitted onto the inner wall of the hole ring 9 , and the waterproof sealing pad 2 , the servo control system 3 , the side baffle 4 and the stiffening plate 6 are all mounted on the base bottom plate 7 .

[0052] The shape and size of the base bottom plate 7 are determined by the shape and size of the hole ring 9, so that the base bottom plate 7 can be installed snugly on the inner wall of the hole ring 9, facilitating the installation of the side baffles 4, the stiffening plate 6, the waterproof sealing gasket 2, and the servo control system 3. This effectively avoids drilling holes in the hole ring 9 to install the above components, which would affect the safety and stability of the hole ring 9, thereby ensuring the structural integrity of the hole ring 9. Preferably, the base bottom plate 7 can be made of steel plate, which has the advantages of high strength and high stability.

[0053] An adsorption layer 8 is circumferentially installed on the outer side of each side baffle 4 , and the adsorption layer 8 is located between the base bottom plate 7 and the flexible sealing plate 1 .

[0054] Preferably, the adsorption layer 8 can be made of sponge, the thickness of which is consistent with the width of the side baffle 4 , and is used to absorb the grease leaked from the hole ring 9 .

[0055] Please see the attached Figure 1 To the attached Figure 4 A servo-controlled sealing method for a slurry shield tunneling machine comprises the following steps:

[0056] Step 1: Before the slurry shield machine enters the tunnel ring 9, the plunger of the first jack 301 in each servo control system 3 is extended for the first time, so that the first side of the waterproof sealing pad 2 (i.e., the side close to the first jack 301) is deformed, and the first side of the flexible sealing plate 1 (i.e., the side close to the first jack 301) is separated from the side baffle 4 and deformed.

[0057] As the plunger of the first jack 301 extends, the first side of the waterproof sealing pad 2 is deformed toward the center of the hole ring 9, and the first side of the flexible sealing plate 1 is pushed close to the slurry shield body.

[0058] Step 2: When the slurry shield enters the hole ring 9, the plunger of the first jack 301 in each servo control system 3 is extended for the second time, so that the first side of the flexible sealing plate 1 and the waterproof sealing pad 2 are further deformed, and the first side of the flexible sealing plate 1 is sealed and attached to the slurry shield body, thereby blocking the gap between the slurry shield body and the hole ring 9, as shown in the attached figure. Figure 3 shown.

[0059] At this time, the first side of the waterproof sealing pad 2 is deformed to the same shape as the slurry shield body, so that the first side of the flexible sealing plate 1 is sealed and wrapped around the slurry shield body to achieve the effect of gap sealing.

[0060] Step 3: Before the slurry shield machine continues to advance and exposes the tunnel segments, the plunger of the second jack 302 in each servo control system 3 is extended for the first time, so that the second side of the flexible sealing plate 1 (i.e., the side close to the second jack 302) and the second side of the waterproof sealing pad 2 (i.e., the side close to the second jack 302) are deformed, as shown in the attached figure. Figure 4 shown.

[0061] As the plunger of the first jack 301 extends, the second side of the waterproof sealing pad 2 is deformed toward the center of the hole ring 9, and the second side of the flexible sealing plate 1 is pushed to the tunnel segment.

[0062] Step 4: When the slurry shield machine advances and exposes the tunnel segments, the plunger of the second jack 302 in each servo control system 3 is extended for the second time, so that the second side of the flexible sealing plate 1 and the second side of the waterproof sealing pad 2 are further deformed, and the second side of the flexible sealing plate 1 is sealed and fitted on the tunnel segments, blocking the gap between the hole ring 9 and the tunnel segments.

[0063] At this time, the second side of the waterproof sealing pad 2 is deformed to the same shape as the tunnel segment, so that the second side of the flexible sealing plate 1 is sealed and fitted with the tunnel segment, achieving the effect of gap sealing.

[0064] The plunger extension height of the first jack 301 and the second jack 302 can be adjusted according to the actual gap width to meet the load adjustment requirements of different parts during actual construction, ensuring that the plungers of the first jack 301 and the second jack 302 are pressed tightly against the slurry shield machine body and the tunnel segments, thereby ensuring the effectiveness of gap sealing. Preferably, the plunger extension height of the first jack 301 is above 25 cm, which is used to seal the gap between the slurry shield machine body and the tunnel ring 9, and the plunger extension height of the second jack 302 is above 35 cm, which is used to seal the gap between the tunnel ring 9 and the tunnel segments. During the entire process of the slurry shield machine entering the tunnel, the plunger extension height of the first jack 301 and the second jack 302 can be adjusted according to the actual working conditions to ensure the gap sealing effect.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealing method for a servo-controlled sealing device for a slurry shield tunneling machine, characterized by: The slurry shield tunneling servo control sealing device comprises a flexible sealing plate (1), a waterproof sealing pad (2), a servo control system (3) and a tunnel ring (9); the tunnel ring (9) is fixed at the tunnel entrance of the slurry shield machine, the servo control system (3) is arranged on the inner wall of the tunnel ring (9), and a plurality of groups of servo control systems (3) are arranged at intervals along the circumference of the tunnel ring (9); one end of the waterproof sealing pad (2) is sealed and connected to the tunnel ring (9) and covers the outside of the plurality of groups of servo control systems (3); the other end of the waterproof sealing pad (2) is connected to the flexible sealing plate (1), and the waterproof sealing pad (2) can be deformed as the plungers of the plurality of groups of servo control systems (3) extend; the flexible sealing plate (1) is located on the inner side of the tunnel ring (9), so that the flexible sealing plate (1) can be deformed synchronously with the waterproof sealing pad (2) and sealed and fitted on the slurry shield machine body and the tunnel segment; Each group of the servo control system (3) comprises two servo jacks, namely a first jack (301) and a second jack (302) arranged in sequence along the propulsion direction of the slurry shield machine, and the plunger of each servo jack is arranged facing the slurry shield machine body and the tunnel segment; Side baffles (4) are provided on both sides of the waterproof sealing pad (2). The side baffles (4) are annular in structure and are coaxially arranged between the hole ring (9) and the flexible sealing plate (1), so that a sealed space can be formed between the flexible sealing plate (1), the two side baffles (4) and the hole ring (9). Several groups of servo control systems (3) and the waterproof sealing pads (2) are arranged in the sealed space. The sealing method comprises the following steps: Step 1: Before the slurry shield machine enters the tunnel ring (9), the plunger of the first jack (301) in each servo control system (3) is extended for the first time, so that the first side of the waterproof sealing pad (2) is deformed, and the first side of the flexible sealing plate (1) is separated from the side baffle (4) and deformed; Step 2: When the slurry shield machine enters the tunnel ring (9), the plunger of the first jack (301) in each servo control system (3) is extended for the second time, so that the first side of the flexible sealing plate (1) and the waterproof sealing pad (2) are further deformed, and the first side of the flexible sealing plate (1) is sealed and attached to the slurry shield machine body, thereby blocking the gap between the slurry shield machine body and the tunnel ring (9); Step 3: Before the slurry shield machine continues to advance and exposes the tunnel segments, the plunger of the second jack (302) in each servo control system (3) is extended for the first time, so that the second side of the flexible sealing plate (1) and the second side of the waterproof sealing pad (2) are deformed; Step 4: When the slurry shield machine advances and exposes the tunnel segments, the plunger of the second jack (302) in each servo control system (3) is extended for the second time, so that the second side of the flexible sealing plate (1) and the second side of the waterproof sealing pad (2) are further deformed, and the second side of the flexible sealing plate (1) is sealed and fitted on the tunnel segments, thereby blocking the gap between the hole ring (9) and the tunnel segments.

2. The sealing method of the slurry shield tunneling servo control sealing device according to claim 1 is characterized by: Each of the servo jacks is equipped with a signal transceiver (5), which is connected to an external control device.

3. The sealing method of the servo control sealing device for slurry shield tunneling according to claim 1 is characterized by: The flexible blocking plate (1) is connected to the side baffle (4) by adhesive bonding, and the bonding force between the flexible blocking plate (1) and the side baffle (4) is smaller than the propulsion force of the plunger of the servo control system (3).

4. The sealing method for the servo control sealing device for a slurry shield tunneling according to claim 1 or 3, wherein: The circular ring width of the side baffle (4) is smaller than the gap width between the hole ring (9) and the slurry shield machine body and the gap width between the hole ring (9) and the tunnel segment.

5. The sealing method of the servo control sealing device for slurry shield tunneling according to claim 4 is characterized by: A stiffening plate (6) is provided between the outer side of each side baffle (4) and the hole ring (9).

6. The sealing method of the servo control sealing device for slurry shield tunneling according to claim 5 is characterized by: A base bottom plate (7) is fitted on the inner wall of the hole ring (9), and a waterproof sealing pad (2), a servo control system (3), a side baffle (4) and a stiffening plate (6) are all mounted on the base bottom plate (7).

7. The sealing method of the servo control sealing device for slurry shield tunneling according to claim 4 is characterized by: An adsorption layer (8) is circumferentially installed on the outer side of each side baffle (4), and the adsorption layer (8) is located between the base bottom plate (7) and the flexible sealing plate (1).

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