An integrated plugging structure and method for high water pressure shield tunnel

Abstract

The application relates to the technical field of tunnel engineering, in particular to an integrated plugging structure and method for a high-water-pressure shield tunnel. The plugging structure comprises a plugging wall, a buttress wall, a flood-prevention safety door and a lane plate. The lane plate is arranged along the longitudinal direction of the tunnel. The end of the lane plate is provided with the plugging wall arranged along the cross section in the tunnel. The plugging wall is provided with a door opening. The door opening is provided with the flood-prevention safety door. At least two buttress walls are vertically arranged on the lane plate, and the upper ends of the buttress walls are extended to be connected with segments. The door opening is arranged between the two adjacent buttress walls. The buttress wall is connected with the plugging wall and is longitudinally extended along the lane plate to support the plugging wall. The plugging wall is arranged along the cross section in the tunnel. The plugging wall, the buttress wall, the lane plate and the lower side wall are connected to form a three-dimensional integrated stress structure system. The transverse and longitudinal rigidity of the plugging structure is improved. The problem of insufficient longitudinal rigidity of a single plugging wall structure is avoided. The plugging structure can meet the requirement of greater water and soil pressure.

Description

Technical Field

[0001] This invention relates to the field of tunnel engineering technology, and in particular to an integrated sealing structure and method for high water pressure shield tunnels. Background Technology

[0002] Shield tunneling is widely used in the construction of tunnels in subways, roads, highways, and railways. Currently, underwater shield tunnels are trending towards longer distances and larger tunnel faces. For ultra-long tunnels, when a shield machine cannot be received or a shaft is not available, a river-connection method is required. This involves using another shield machine to tunnel towards the original machine and connect with it. This process requires grouting or freezing reinforcement at the connection point, as well as cutterhead cutting. Cast-in-place lining is then constructed inside the shield shell. To ensure construction safety, safety doors and sealing structures are typically installed at the tail of the shield and fixed to the tunnel segments to handle sudden water or mud surges at the connection point. Traditional safety doors face low water pressure and do not require consideration of the tunnel structure safety after rigid connection with the tunnel segments, but they still have the following drawbacks:

[0003] 1) The traditional single safety door structure force system cannot withstand higher water and soil pressure and cannot meet the emergency requirements of high water pressure and large cross-section shield tunnels;

[0004] 2) Traditional safety doors are rigidly connected to the tunnel segments, which increases the water and soil pressure in the tunnel and the longitudinal reinforcement of the tunnel segments cannot meet the strength requirements, which may cause damage to the tunnel segments. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an integrated sealing structure for high-water-pressure shield tunnels, comprising a sealing wall, a buttress wall, a flood-proof safety door, and a roadway slab. The roadway slab is arranged longitudinally along the tunnel, and a sealing wall is provided at the end of the roadway slab along the cross section inside the tunnel. A doorway is provided on the sealing wall, and the flood-proof safety door is adapted to the doorway. At least two buttress walls are vertically arranged on the roadway slab, with their upper ends extending to connect with the tunnel lining segments. The doorway is provided between two adjacent buttress walls. The buttress walls are connected to the sealing wall and extend longitudinally along the roadway slab to support the sealing wall.

[0006] Furthermore, a circumferential corbel is provided on the side of the sealing wall facing away from the working face, and the circumferential corbel is arranged circumferentially along the segments except for the buttress wall and the driveway plate.

[0007] Furthermore, a fixed bracket is provided on the side of the sealing wall located below the lane slab facing the working face, and the fixed bracket is arranged along the segments below the lane slab.

[0008] Furthermore, it also includes connectors, through which the sealing wall, buttress wall, circumferential corbel, fixed corbel, lane plate, and the lower side wall at the bottom of the lane plate are connected to the pipe segment.

[0009] Furthermore, the sealing wall includes an upper part of the sealing wall located on the upper surface of the lane slab and a lower part of the sealing wall located on the lower surface of the lane slab, with the side of the sealing wall facing the working face flush with the end face of the lane slab.

[0010] Furthermore, one end of the buttress wall is located inside the sealing wall, and the side of the buttress wall facing the working face is flush with the sealing wall.

[0011] Furthermore, the lane plate is connected to the pipe segment at both lateral ends, and an enlarged first axle angle is provided at the connection point. The bottom of the lower side wall of the lane plate is connected to the pipe segment, and an enlarged second axle angle is provided at the connection point.

[0012] Furthermore, the blocking wall located below the lane plate is provided with an evacuation door adapted to the evacuation passage, and the evacuation door is movably connected to the blocking wall.

[0013] Furthermore, the lower end of the buttress wall is rectangular, and the upper end is a wedge shape that is narrower at the top and wider at the bottom.

[0014] On the other hand, the present invention also provides an integrated sealing method for high water pressure shield tunnels, comprising the following steps:

[0015] S1: Construct a sealing wall along the cross section inside the tunnel at the end of the lane slab and reserve a doorway, which is equipped with a flood-proof safety door.

[0016] S2: At least two buttress walls shall be constructed longitudinally along the end of the lane slab, wherein two adjacent buttress walls are located on both sides of the flood safety gate, and the sealing wall is connected to the buttress wall.

[0017] S3: Construct circumferential corbels on the side of the sealing wall facing the working face. The circumferential corbels are set circumferentially along the segments and are interrupted at the buttress walls and driveway slabs. Construct fixed corbels on the side of the sealing wall facing away from the working face below the driveway slab. The fixed corbels are arranged along the segments at the lower side wall positions except for the bottom of the driveway slab.

[0018] S4: After the tunnel construction is completed, the flood prevention safety door, buttress wall, circumferential corbel, fixed corbel and sealing wall shall be removed.

[0019] By employing the above technical solutions, this invention has the following advantages compared to existing technologies:

[0020] 1) The integrated sealing structure for high water pressure shield tunnels provided by the present invention sets a sealing wall in the cross section of the tunnel inside except for the flood prevention safety door at the end of the roadway slab. The sealing wall is connected with the buttress wall, roadway slab and lower side wall to form a three-dimensional integrated force-bearing structure system, which improves the lateral and longitudinal stiffness of the sealing structure, avoids the problem of insufficient longitudinal stiffness of a single sealing wall structure, and can meet the requirements of greater water and soil pressure.

[0021] 2) The integrated sealing structure for high-water-pressure shield tunnels provided by this invention, based on the above-mentioned stress-bearing structural system, has a circumferential corbel on one side of the sealing wall and a fixed corbel on the other side of the sealing wall located below the roadway slab. This allows the sealing wall above the roadway slab to be reinforced with a circumferential corbel on one side, forming a hinged connection to release the bending moment at the connection of the upper segments. The sealing wall below the roadway slab is reinforced with circumferential corbels and fixed corbels on both sides, forming a fixed connection, resulting in greater stiffness of the lower structure and greater capacity to bear internal forces. At the same time, the widened haunch angle at the connection between the roadway slab, the lower sidewall, and the segments resists bending moment and shear force. The circumferential corbels are set around the entire ring and the connecting parts are set to resist shear, avoiding the problem of excessive local bending moment and shear force on the segments and causing damage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the integrated sealing structure of the present invention for high water pressure shield tunnels;

[0023] Figure 2 This is a 1-1 cross-sectional schematic diagram of the integrated sealing structure for high water pressure shield tunnels according to the present invention;

[0024] Figure 3 This is a schematic diagram of the integrated sealing structure reinforcement for high water pressure shield tunnels according to the present invention.

[0025] Figure 4 This is a schematic diagram of the main load transfer of the integrated sealing structure for high water pressure shield tunnels according to the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 1-Pipeline segment; 2-Sealing wall; 3-Buttress wall; 4-Floodproof safety door; 5-Walkway slab; 6-Lower side wall; 7-Beam; 8-Evacuation door; 9-Circular corbel; 10-Fixed corbel; 11-Curved plate; 12-Connector. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the accompanying drawings, the dimensions and relative dimensions of certain parts may be enlarged for clarity.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connection" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] In the description of this invention, terms such as "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Furthermore, in the description of this invention, the terms "first" and "second" are used merely for descriptive distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Additionally, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0032] Example 1

[0033] This invention provides an integrated sealing structure for high-water-pressure shield tunnels, as shown in the appendix to the specification. Figure 1 and 2 As shown, Figure 2 for Figure 1 The cross-sectional view in section 1-1 includes a sealing wall 2, a buttress wall 3, a flood-proof safety door 4, and a lane slab 5. The lane slab 5 is arranged longitudinally along the tunnel. At the end of the lane slab 5, a sealing wall 2 is arranged along the cross section inside the tunnel. A doorway is opened on the sealing wall 2, and the flood-proof safety door 4 is adapted to the doorway. The flood-proof safety door 4 can be opened and closed. At least two buttress walls 3 are vertically arranged on the lane slab 5, and their upper ends extend to connect with the tunnel segment 1. The doorway is arranged between two adjacent buttress walls 3. The buttress walls 3 are connected to the sealing wall 2 and extend longitudinally along the lane slab 5 to support the sealing wall 2.

[0034] Specifically, to address sudden situations such as water and mud inrush at the tunnel connection point (i.e., the tunnel face), the aforementioned sealing structure is installed at the shield tail. The lane slab 5 is installed along the longitudinal direction of the tunnel, and a lower sidewall 6 is provided at the bottom of the lane slab 5. The lower sidewall 6 is installed along the lane slab 5. A sealing wall 2 is installed at the end of the lane slab 5 along the cross section inside the tunnel. The buttress wall 3 is installed on the lane slab 5 and is installed along the longitudinal direction of the lane slab 5. The lane slab 5 is installed laterally on the sealing wall 2, and the lower sidewall 6 and the buttress wall 3 are installed vertically on the sealing wall 2. The lane slab 5, the lower sidewall 6, and the buttress wall 3 extend along the longitudinal direction of the tunnel. The sealing wall 2, the buttress wall 3, the lane slab 5, and the lower sidewall 6 are connected to form a three-dimensional integrated load-bearing structure system, which improves the lateral and longitudinal stiffness of the sealing structure, avoids the problem of insufficient longitudinal stiffness of a single sealing wall structure, and can meet the requirements of greater water and soil pressure.

[0035] In an optimized implementation, the buttress wall 3 and the lower side wall 6 are flush in the vertical direction; preferably, multiple buttress walls 3 can be set on the lane slab 5 for longitudinal support according to actual needs. To maintain force balance, the number of buttress walls 3 is even and they are symmetrically arranged on the lane slab 5.

[0036] In an optimized implementation, the end face of the lane slab 5 is located within the sealing wall 2. The sealing wall 2 is divided into an upper part of the sealing wall located above the lane slab 5 and a lower part of the sealing wall located below the lane slab 5. The front end of the buttress wall 3 is located within the sealing wall 2, wherein the front end refers to the end facing the tunnel face. The doorway is formed between two adjacent buttress walls 3. The flood prevention safety door 4 is movably connected to the buttress wall 3. When the flood prevention safety door 4 is in the closed state, the sealing wall 2 and the flood prevention safety door 4 are on the same plane, which can form a sealed space in the shield tunnel to prevent water from flowing into the shield tunnel at the tunnel connection point. Preferably, the sealing wall 2 and the flood prevention safety door 4 are located at the end of the lane slab 5, that is, on the side facing the tunnel face. The surface of the sealing wall 2 is flush with the buttress wall 3, the lane slab 5, and the lower side wall 6.

[0037] In an optimized implementation, a crossbeam 7 is provided at the upper end of the doorway. The crossbeam 7 is located above the flood-proof safety door 4 and its two ends are connected to the buttress walls 3 on both sides of the flood-proof safety door 4. The crossbeam 7 extends longitudinally to be flush with the buttress walls 3.

[0038] It should be noted that the flood-proof safety door 4 is normally open during construction. In the event of a sudden emergency, the flood-proof safety door 4 will close to achieve the purpose of flood prevention and protect the shield tunnel. The flood-proof safety door 4 can be installed as a single door or a double door, which can be selected according to the needs. However, the size of the flood-proof safety door 4 must meet the requirements. When the flood-proof safety door 4 is open, it can allow construction transport vehicles to pass through.

[0039] In this invention, there are no restrictions on the material of the flood-proof safety door 4. Specifically, the flood-proof safety door can be made of steel, which can improve the strength and reliability of the sealing structure.

[0040] Specifically, a lane slab 5 is installed inside the shield tunnel, extending a certain length longitudinally along the shield tunnel. The bottom of the lane slab 5 is connected to a lower sidewall 6 for support. The lower sidewall 6 extends longitudinally along the shield tunnel with the same extension length as the lane slab 5. The two ends of the lane slab 5 are connected to the tunnel segment 1. The top of the lower sidewall 6 is connected to the lane slab 5, and the bottom is connected to the tunnel segment 1. Preferably, an enlarged first axle angle is provided at the connection between the lane slab 5 and the tunnel segment 1. The first axle angle extends to the upper and lower sides of the lane slab 5, increasing the contact area between the lane slab 5 and the tunnel segment 1. The first axle angle extends 1m to the upper and lower sides of the lane slab. An enlarged second axle angle is provided at the connection between the lower sidewall 6 and the tunnel segment 1. The second axle angle extends to the left and right sides of the lower sidewall 6, increasing the contact area between the lower sidewall 6 and the tunnel segment 1. The second axle angle extends 0.5m to the left and right sides of the lower sidewall. By setting the first and second axle angles, the bending moment and shear strength can be improved.

[0041] For personnel evacuation safety, evacuation doors 8 adapted to the evacuation passages are also installed inside the shield tunnel. The evacuation doors 8 are located below the roadway slab 5 and between the lower side walls 6 on both sides. The evacuation doors 8 are movably mounted on the sealing wall 2 and can be opened and closed. They can be used to evacuate construction personnel at the tunnel connection point to a safe area in an emergency. In case of an emergency, the evacuation doors 8 are in the closed state. Below the roadway slab 5, the sealing wall 2 is arranged in the area on the tunnel cross section other than the evacuation doors 8. When the evacuation doors 8 are in the closed state, the side of the evacuation doors 8 facing the working face is flush with the sealing wall 2.

[0042] As one embodiment, a circumferential bracket 9 is connected to one side of the sealing wall 2. The circumferential bracket 9 is arranged circumferentially along the segment 1, and the end face of the circumferential bracket 9 is connected to the segment 1. The connection between the circumferential bracket 9 and the sealing wall 2 is used to reinforce the strength of the sealing wall 2. Preferably, the circumferential bracket 9 is arranged on the side of the sealing wall 2 away from the working face, and is arranged along the segment 1 in areas other than the buttress wall 3, the driveway slab 5, the lower side wall 6, and the evacuation door 8. Preferably, a plurality of the circumferential brackets 9 are evenly arranged along the circumference of the segment 1 on the side of the sealing wall 2 away from the working face.

[0043] As one implementation method, the other side of the sealing wall 2 is connected to a fixed bracket 10, and the fixed bracket 10 is only located on the other side of the sealing wall 2 below the lane plate 5. The fixed bracket 10 is set along the pipe segment 1 below the lane plate 5, except for the lower side wall 6 and the evacuation door 8. Specifically, the other side of the sealing wall 2 is the side of the sealing wall 2 facing the working face. The two sides of the sealing wall 2 below the lane plate 5 are reinforced by circumferential brackets 9 and fixed brackets 10 respectively.

[0044] Specifically, the sealing wall 2 located above the lane plate 5 has a circumferential bracket 9 on only one side, so that the sealing wall 2, the circumferential bracket 9, and the pipe segment 1 are connected in a hinged manner. The sealing wall 2 located below the lane plate 5 is reinforced on both sides by the circumferential bracket 9 and the fixed bracket 10, so that the sealing wall 2, the fixed bracket 10, and the pipe segment 1 are fixedly connected.

[0045] Preferably, an arc-shaped plate 11 is also provided inside the shield tunnel. The arc-shaped plate 11 is located below the lane plate 5 and is arranged along the tunnel segment 1, extending longitudinally to be flush with the lane plate 5.

[0046] As one embodiment, the sealing structure also includes a connector 12, as shown in the appendix to the specification. Figure 3 As shown, the connector 12 is provided at the connection points between the sealing wall 2, the buttress wall 3, the circumferential corbel 9, the fixed corbel 10, the driveway slab 5, and the lower side wall 6 and the segment 1. That is, the connector 12 is provided along the entire circumference of the segment 1. One end of the connector 12 extends into the segment 1, and the other end is connected to the corresponding sealing wall 2, buttress wall 3, circumferential corbel 9, fixed corbel 10, driveway slab 5, and lower side wall 6. At the same time, a connector 12 is also provided at the connection point between the arc plate 11 and the segment 1 for the consolidation of each component with the segment 1.

[0047] Specifically, the connector 12 can be a rebar or an anchor rod, depending on the actual needs.

[0048] In an optimized implementation, the lower end of the buttress wall 3 is rectangular, and the upper end is a wedge shape that is narrower at the top and wider at the bottom. Specifically, the buttress wall 3 located above the crossbeam 7 is inclined from bottom to top toward the sealing wall 2, while the buttress wall located below the crossbeam 7 is vertically set and rectangular, which can improve the longitudinal support strength of the buttress wall.

[0049] As per the instruction manual Figure 4 The diagram shows the main load transfer of the sealing structure. In an emergency, with the flood-proof safety door and evacuation door closed, the sealing structure is subjected to water (soil) pressure on one side of the tunnel connection. The sealing wall is located at the end of the lane slab. Three connection nodes are formed between the sealing structure and the tunnel segment: one at the upper part of the lane slab, another at the lower part, and the third at the lower part. A circumferential corbel is installed on one side of the sealing wall above the lane slab, creating a hinged connection with the tunnel segment, which releases the bending moment at the connection between the sealing wall and the tunnel segment. Circumferential corbels and fixed corbels are respectively installed on both sides of the sealing wall below the lane slab to form a solid connection with the tunnel segment, thereby increasing the stiffness of the lower part of the sealing wall and improving its resistance to shear force. Furthermore, an enlarged first abutment is set at the connection between the lane slab and the tunnel segment, and an enlarged second abutment is set at the connection between the lower side wall and the tunnel segment, increasing the contact area between the lane slab and the lower side wall and the tunnel segment, which can further resist bending moment and shear force. Furthermore, connectors are set along the circumference of the tunnel segment to strengthen the connection strength between each component and the tunnel segment, improve the shear strength, and avoid the risk of damage due to excessive local bending moment and shear force on the tunnel segment.

[0050] Example 2

[0051] This invention also provides an integrated sealing method for high-water-pressure shield tunnels, comprising the following steps:

[0052] S1: At the end of the lane slab 5, construct a sealing wall 2 along the cross section inside the tunnel and reserve a doorway. The doorway is equipped with a flood-proof safety door 4.

[0053] S2: At least two buttress walls 3 are constructed along the longitudinal direction of the lane slab 5 at the end of the lane slab 5, wherein two adjacent buttress walls 3 are located on both sides of the flood prevention safety gate 4, and the sealing wall 2 is connected to the buttress wall 3.

[0054] Specifically, longitudinally arranged buttresses 3 are installed on the lane slab 5. The buttresses 3 are vertically arranged, with their upper ends connected to the tunnel segments 1. The front end of the buttresses 3 is connected to the sealing wall 3, and the rear end extends a certain length along the longitudinal direction of the lane slab 5. The lane slab 5 is arranged laterally on the sealing wall 3, and the buttresses 3 and the lower side walls 6 are arranged vertically on the sealing wall 3. The lane slab 5 and the lower side walls 6 extend along the longitudinal direction of the tunnel. The sealing wall 2 forms a three-dimensional integrated load-bearing structure system by connecting with the buttresses 3, the lane slab 5 and the lower side walls 6, thereby improving the lateral and longitudinal stiffness of the sealing structure.

[0055] Specifically, in order to improve the reliability of the connection between the buttress wall and the sealing wall and the driveway slab, the buttress wall and the sealing wall and the driveway slab are integrated by reinforced concrete casting, so that the driveway slab, the sealing wall, the buttress wall and the tunnel segments form an integral structure, thereby improving the strength of the sealing structure.

[0056] S3: Construct a circumferential corbel 9 on the side of the sealing wall 2 facing the working face. The circumferential corbel 9 is arranged circumferentially along the segment 1 and is interrupted at the buttress wall 3 and the driveway slab 5. Construct a fixed corbel 10 on the side of the sealing wall 2 facing away from the working face below the driveway slab 5. The fixed corbel 10 is arranged along the segment 1 at the lower side wall 6 except the bottom of the driveway slab 5.

[0057] Specifically, a circumferential bracket 9 is installed on one side of the sealing wall 2 located above the lane slab 5 to release the bending moment at the connection between the upper end of the sealing wall 2 and the segment 1; a circumferential bracket 9 and a fixed bracket 10 are respectively installed on both sides of the sealing wall 2 located below the lane slab 5 to improve the shear strength of the lower end of the sealing wall 2.

[0058] S4: After the construction is completed, remove the flood-proof safety door 4, buttress wall 3, circumferential corbel 9, fixed corbel 10 and sealing wall 2.

[0059] Those skilled in the art will understand that the present invention can be implemented in many other specific forms without departing from the spirit and scope of the invention. Although embodiments of the invention have been described, it should be understood that the invention is not limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of the invention as defined in the appended claims.

Claims

1. An integrated sealing structure for high-water-pressure shield tunnels, characterized in that, The system includes a sealing wall, buttress walls, flood-proof safety doors, and a roadway slab. The roadway slab is arranged longitudinally along the tunnel. At the end of the roadway slab, a sealing wall is provided along the cross section of the tunnel. The sealing wall has a doorway, and the flood-proof safety door is fitted into the doorway. At least two buttress walls are vertically arranged on the roadway slab, with their upper ends extending to connect with the tunnel segments. The doorway is provided between two adjacent buttress walls. The buttress walls are connected to the sealing walls and extend longitudinally along the roadway slab to support the sealing walls. A circumferential corbel is provided on the side of the sealing wall facing away from the tunnel face. The circumferential corbel is arranged circumferentially along the tunnel segments except for the buttress walls and the roadway slab. A fixed corbel is provided on the side of the sealing wall below the roadway slab facing the tunnel face. The fixed corbel is arranged along the tunnel segments below the roadway slab.

2. The integrated sealing structure for high-water-pressure shield tunnels according to claim 1, characterized in that, It also includes connectors, through which the sealing wall, buttress wall, circumferential corbel, fixed corbel, lane slab, and the lower side wall at the bottom of the lane slab are connected to the pipe segment.

3. The integrated sealing structure for high-water-pressure shield tunnels according to claim 1, characterized in that, The sealing wall includes an upper part of the sealing wall located on the upper surface of the lane slab and a lower part of the sealing wall located on the lower surface of the lane slab, with the side of the sealing wall facing the working face flush with the end face of the lane slab.

4. The integrated sealing structure for high-water-pressure shield tunnels according to claim 1, characterized in that, One end of the buttress wall is located inside the sealing wall, and the side of the buttress wall facing the working face is flush with the sealing wall.

5. The integrated sealing structure for high-water-pressure shield tunnels according to claim 1, characterized in that, The lane slab is connected to the pipe segment at both ends in the lateral direction, and an enlarged first axle angle is provided at the connection point. The bottom of the lower side wall of the lane slab is connected to the pipe segment, and an enlarged second axle angle is provided at the connection point.

6. The integrated sealing structure for high-water-pressure shield tunnels according to claim 1, characterized in that, An evacuation door adapted to the evacuation passage is provided on the sealing wall located below the lane board, and the evacuation door is movably connected to the sealing wall.

7. The integrated sealing structure for high-water-pressure shield tunnels according to claim 1, characterized in that, The lower end of the buttress wall is rectangular, while the upper end is a wedge shape that is narrower at the top and wider at the bottom.

8. An integrated sealing method for high-water-pressure shield tunnels, characterized in that, Includes the following steps: S1: Construct a sealing wall along the cross section inside the tunnel at the end of the lane slab and reserve a doorway, which is equipped with a flood-proof safety door. S2: At least two buttress walls shall be constructed longitudinally along the end of the lane slab, wherein two adjacent buttress walls are located on both sides of the flood safety gate, and the sealing wall is connected to the buttress wall. S3: Construct circumferential corbels on the side of the sealing wall facing the working face. The circumferential corbels are set circumferentially along the segments and are interrupted at the buttress walls and driveway slabs. Construct fixed corbels on the side of the sealing wall facing away from the working face below the driveway slab. The fixed corbels are arranged along the segments at the lower side wall positions except for the bottom of the driveway slab. S4: After the tunnel construction is completed, the flood prevention safety door, buttress wall, circumferential corbel, fixed corbel and sealing wall shall be removed.

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