A shield receiver for tunnel engineering

Abstract

The present application relates to the technical fields of tunnel engineering shield receiving, and a shield receiver for tunnel engineering, which comprises a support, the shield receiver is arranged on the support, the shield receiver comprises a pressurization control system and a plurality of steel shells which are sequentially detachably fixedly connected, each of the steel shells is provided with a grouting hole and a grease injection hole which are simultaneously connected with the pressurization control system; each of the steel shells comprises a plurality of steel rings which are sequentially detachably connected in a ring shape, and the steel rings of adjacent steel shells are detachably fixedly connected; the inner wall of the steel ring is further provided with a sealing device which is in close contact with a cutter head and a shield machine shell when the cutter head of the shield machine enters the steel shell and seals the cutter head and the shield machine shell. The present application provides a shield receiver for tunnel engineering to replace end reinforcement with mechanical devices, expand the use range, improve the reinforcement effect, and reduce the risk of shield receiving process.

Description

Technical Field

[0001] This invention relates to the field of shield receiving technology in tunnel engineering, and in particular to a shield receiver for tunnel engineering. Background Technology

[0002] Currently, in urban subway construction, site or geological conditions often limit the implementation of end reinforcement during shield tunneling reception, or the reinforcement effect is insufficient to meet the requirements. Therefore, how to safely, practically, and economically conduct shield tunneling reception is a topic of great concern in the shield tunneling engineering community.

[0003] In existing technologies, the soil at the tunnel entrance is generally reinforced before the tunnel boring machine (TBM) receives the tunnel. The purpose of reinforcing the soil at the tunnel entrance is mainly twofold: firstly, to improve the strength and stability of the soil behind the tunnel portal retaining wall, preventing soil instability after the TBM breaks through the wall, which could cause ground deformation, ground subsidence, or even collapse; secondly, the reinforced soil can form an effective water-stopping curtain within a certain range at the tunnel entrance, preventing groundwater from seeping into the working shaft after the tunnel portal is opened, especially in sandy soil layers with high groundwater levels and high permeability. If a large amount of groundwater is lost from the soil layer, it can also cause ground subsidence.

[0004] Existing methods for reinforcing the receiving end of tunnel boring machines (TBMs) include grouting, jet grouting, soil mixing piles, and freezing. However, in actual engineering projects, the geological structure is often complex, and existing reinforcement techniques and solidification testing methods have limitations, resulting in poor end-point reinforcement effects and high risks associated with TBM reception. Summary of the Invention

[0005] The purpose of this invention is to provide a shield receiver for tunnel engineering to reduce the risks of the shield receiving process; another purpose of this invention is to provide a method of using mechanical devices to replace end reinforcement, thereby expanding the scope of application and improving the reinforcement effect.

[0006] To achieve the above objectives, the present invention provides a shield receiver for tunnel engineering, comprising a support, wherein the shield receiver is mounted on the support, the shield receiver includes a pressure control system and a plurality of steel shells that are detachably and fixedly connected in sequence, each of the steel shells having a grouting hole and a grease injection hole that are simultaneously connected to the pressure control system; each of the steel shells includes a plurality of steel rings, which are detachably and fixedly connected in sequence to form a ring, and the steel rings of adjacent steel shells are detachably and fixedly connected; the inner wall of the steel ring is also provided with a sealing device that fits and seals against the cutterhead and the outer shell of the shield machine when the cutterhead of the shield machine enters the steel shell.

[0007] As a preferred embodiment, each of the steel rings is provided with a first flange on its radial edge, and each first flange is provided with a first mounting hole. The first mounting holes of adjacent steel rings are arranged opposite to each other and are detachably fixedly connected by a first fastener, so that the multiple steel rings can be detachably fixedly enclosed to form the steel shell.

[0008] As a preferred embodiment, each of the steel rings has a second flange on its axial edge that is away from the arc center of the steel ring. Each of the second flanges has a second mounting hole. The second mounting holes of adjacent steel rings are arranged opposite to each other and are detachably fixedly connected by a second fastener, so that the adjacent steel shells can be detachably fixedly connected.

[0009] As a preferred embodiment, the second mounting holes are distributed at 5° intervals along the circumference of the second flange.

[0010] As a preferred embodiment, a first sealing gasket is fitted between adjacent first flanges, the first sealing gasket being distributed in a ring shape, and the first fastener passing through the first sealing gasket; a second sealing gasket is fitted between adjacent second flanges, the second sealing gasket being distributed in a straight line, and the first fastener passing through the first sealing gasket.

[0011] As a preferred embodiment, each of the steel rings has multiple bolt holes pre-drilled for installing the sealing device. The steel rings also have air injection holes connecting the pressure control system and the sealing device. The sealing device includes a composite airbag and a composite flexible sealing plate. The composite airbag has composite protective films on both its inner and outer surfaces. The inner surface of the composite airbag is fixedly connected to the inner wall of the steel ring, and the outer surface of the composite airbag is connected to the inner layer of the composite flexible sealing plate. The outer layer of the composite flexible sealing plate abuts against the outer shell of the tunnel boring machine. The composite airbag can expand and fill the gap between the steel ring and the outer shell of the tunnel boring machine when the cutterhead of the tunnel boring machine enters the steel shell.

[0012] As a preferred embodiment, the pressurization control system includes a pressure control device, an input pipeline, and an output pipeline. Both the input pipeline and the output pipeline are connected to the pressure control device. The input pipeline includes a grout supply pipeline, an air supply pipeline, and a grease supply pipeline corresponding to the grouting hole, air injection hole, and grease injection hole.

[0013] As a preferred embodiment, the support includes a base, jacks, and brackets. The lower part of each steel shell is welded to the bracket, and jacks are spaced apart on the left and right sides under each bracket. Each jack is placed on the base.

[0014] As a preferred embodiment, each of the steel shells has ribs on its outer wall; the steel shells are provided with observation holes.

[0015] The shield receiving method using the aforementioned shield receiver includes the following steps:

[0016] S1: Inside the station end shaft, steel rings, sealing devices, and pressure control systems are assembled according to the reserved installation holes and bolt holes; when the tunnel boring machine advances to the tunnel portal, the pressure control system is used to start injecting grout into the grouting holes into the steel shell cavity;

[0017] S2: When the shield machine cutterhead enters the steel shell, the pressurization control system injects gas into the air injection hole into the composite airbag, so that the composite airbag expands and fills the gap between the inner wall of the shield receiver and the cutterhead and the outer shell of the shield machine. At the same time, the pressurization control system injects grease into the grease injection hole into the steel shell.

[0018] S3: Until the tunnel boring machine cutterhead reaches the end plate, the pressurization control system injects gas into the air injection holes to inflate the composite airbags in each steel shell, and then removes the end plate.

[0019] S4: The pressurization control system continuously injects grease into the steel shell and continues to inflate and pressurize the composite airbag, so that the composite airbag expands and presses tightly onto the tunnel lining segments of the tunnel boring machine, and grouts are injected behind the retaining piles in the station end well through the pre-embedded grouting holes.

[0020] S5: Cast a sealing ring beam after the shield tunneling machine is received.

[0021] As a preferred option, after the shield receiving work is completed, part of the steel ring is removed to allow the shield machine sufficient space to be lifted out, while the steel shell at the tunnel entrance is retained.

[0022] Compared with existing technologies, the shield tunneling receiver of this invention has the following advantages: The shield tunneling receiver is mounted on the support, providing support and maintaining its stress balance. The receiver includes a pressure control system and multiple steel shells that are sequentially and detachably fixedly connected. Embedding the steel shells in the soil can replace conventional end reinforcement methods, adapting to various geological formations and providing stable reinforcement. Each steel shell has pre-drilled grouting and grease injection holes connected to the pressure control system, allowing the input of grout, gas, and grease required during the shield tunneling process, providing basic working conditions for the receiving operation and ensuring its smooth progress. Each steel shell includes multiple steel rings, which are sequentially and detachably connected in a ring shape. The steel rings of adjacent steel shells are detachably fixedly connected, facilitating installation and removal and enabling reuse. Each of the steel shells includes multiple steel rings, which are detachably connected in sequence to form a ring shape. The steel rings of adjacent steel shells are detachably fixedly connected. The inner wall of each steel ring is also provided with a sealing device that fits and seals with the cutterhead and the outer shell of the tunnel boring machine when the cutterhead enters the steel shell. This device can tightly fill the gap between the tunnel boring machine receiver and the tunnel boring machine, achieving the effect of sealing and preventing water from entering.

[0023] This invention provides a shield receiver for tunnel engineering. It employs a mechanical device to replace the end-reinforcement construction method, ensuring the safety of shield reception. It is applicable to shield reception projects under various geological conditions, improving reinforcement effectiveness and reducing shield reception risks. The steel shells of this invention are detachably connected, offering high applicability and reusability, thus possessing significant economic and practical value. Furthermore, the invention achieves a water-stopping effect through the combination of the steel shells and a sealing device, resulting in a remarkable water-stopping effect. Attached Figure Description

[0024] Figure 1 This is a longitudinal section view of a shield receiver used in tunnel engineering according to an embodiment of the present invention;

[0025] Figure 2 This is a cross-sectional view of a shield receiver used in tunnel engineering according to an embodiment of the present invention;

[0026] Figure 3 This is a detailed drawing of the first flange according to an embodiment of the present invention;

[0027] Figure 4 This is an elevation view of the pipeline layout according to an embodiment of the present invention;

[0028] Figure 5 This is a detailed drawing of the second flange according to an embodiment of the present invention;

[0029] Figure 6 This is a structural diagram of the sealing device according to an embodiment of the present invention;

[0030] In the diagram: 1. Steel shell; 2. Steel ring; 3. Mounting hole; 31. First mounting hole; 32. Second mounting hole; 4. Fastener; 41. First fastener; 42. Second fastener; 5. Bolt hole; 6. Flange; 61. First flange; 62. Second flange; 7. Sealing gasket; 71. First sealing gasket; 72. Second sealing gasket; 8. Support; 81. Bracket; 82. Jack; 83. Base; 9. Pressurization control system; 91. Input pipeline; 92. Pressure control equipment; 93. Output pipeline; 10. Through hole; 101. Grouting hole; 102. Air injection hole; 103. Grease injection hole; 11. Grouting pre-embedded pipe; 12. Observation hole; 13. Sealing device; 131. Composite airbag; 132. Composite protective membrane; 133. Composite flexible sealing plate; 14. Rib plate; 15. End plate. Detailed Implementation

[0031] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0032] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, 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, and therefore should not be construed as a limitation of the invention. It should be understood that the terms "first," "second," etc., are used in this invention to describe various information, but this information should not be limited to these terms; these terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0033] like Figure 1 , Figure 2 The diagram shows a shield receiver for tunnel engineering, including a support on which the shield receiver is mounted. The shield receiver includes a pressure control system 9 and multiple steel shells 1 that are detachably and fixedly connected in sequence. The steel shells 1 are detachable, flexible in use, and reusable. The wall thickness of each steel shell 1 is 16mm, and the diameter of each steel shell 1 is 6800mm. In this embodiment, three steel shells 1 are provided. The first steel shell is a pre-embedded steel shell, and the lengths of the pre-embedded steel shell and the third steel shell are both 900mm. The length of the first detachable steel shell is 600mm. Each of the steel shells 1 is pre-installed with grouting holes 101 and grease injection holes 103, which are simultaneously connected to the pressurization control system 9. The grouting holes 101 and grease injection holes 103 are arranged circumferentially and alternately on each steel shell 1. There are six φ30 grouting holes 101, three of which are pre-installed grouting holes. The pre-installed grouting holes 101 and grease injection holes 103 allow external material supply to the steel shell, meeting the requirements of grouting, pressurization, and other operations during construction, and completing the shield tunneling receiving work. The outer wall of the steel shell 1 is also tightly fitted with grouting pre-embedded pipes 11. The φ30 pre-embedded grouting pipes 11 are seamless steel pipes with a wall thickness of 2mm, arranged circumferentially and alternately. The pressurization control system 9 enables automated control of the receiver during operation by operating the pressure control system. Each of the steel shells 1 includes multiple steel rings 2, which are sequentially and detachably connected to form a ring. The steel rings 2 of adjacent steel shells 1 are detachably and fixedly connected. In this embodiment, two quarter-circular steel rings 2 and one semi-circular steel ring 2 are provided, and the three steel rings 2 are detachably connected to form a ring. Each steel ring has a wall thickness of 16mm. The steel rings 2 are designated as LS steel ring, RS steel ring, and D steel ring, where LS, RS, and D represent the content of different elements in the steel used for the steel rings 2. The inner wall of each steel ring 2 is also provided with a sealing device 13 that seals against the cutterhead and the outer shell of the tunnel boring machine (TBM) when the cutterhead enters the steel shell 1. The annular sealing device 13 ensures that the gap between the TBM receiver and the TBM is filled tightly, achieving a water-stopping effect.

[0034] Each of the steel rings 2 has a first flange 61 on its radial edge, and each first flange 61 has a first mounting hole 31. The first mounting holes 31 of adjacent steel rings 2 are arranged opposite each other and are detachably fixed together by φ20 bolts 41, so that multiple steel rings 2 can be detachably fixed together to form the steel shell 1. Each of the steel rings 2 has a second flange 62 on its axial edge away from the arc center of the steel ring 2. Each second flange 62 has a second mounting hole 32, which is distributed at 5° intervals along the circumference of the second flange 62. The second mounting holes 32 of adjacent steel rings 2 are arranged opposite each other and are detachably fixed together by M16 bolts 42, so that adjacent steel shells 1 can be detachably fixed together.

[0035] In existing technologies, the reinforcement of the shield tunneling receiving end typically employs methods such as grouting, jet grouting, soil mixing piles, and cryogenic reinforcement. However, in practical engineering applications, the geological structure is complex, and current reinforcement techniques and solidification testing methods all have limitations, resulting in poor end-reinforcement effectiveness and high risks associated with shield tunneling. This invention uses a detachable steel shell to replace conventional end-reinforcement methods, making it suitable for various geological formations, improving the safety of shield tunneling, ensuring the effectiveness of shield tunneling, and reducing the risks associated with shield tunneling. Furthermore, the detachable steel shell in this invention can be reused, reducing the engineering cost of shield tunneling.

[0036] A first sealing gasket 71 is fitted between adjacent first flanges 61, and the first sealing gasket 71 is arranged in a straight line. The first fastener 41 passes through the first sealing gasket 71. A second sealing gasket 72 is fitted between adjacent second flanges 62, and the second sealing gasket 72 is arranged in a ring. The second fastener 42 passes through the second sealing gasket 72. The sealing gaskets 71 can improve the sealing effect of the tunnel boring machine receiver.

[0037] Each of the steel rings 2 has multiple bolt holes 5 reserved for installing the sealing device 13. M14 bolts are installed in the bolt holes. Each of the steel rings 2 also has an air injection hole 102 that connects the pressure control system 9 and the sealing device 13. The air injection holes 102 are arranged alternately along the circumference on each of the steel shells 1. There are two φ20 air injection holes 102, one of which is a pre-installed air injection hole. The sealing device 13 includes a 10mm thick composite airbag 131 (when not expanded) and a 20mm thick composite flexible sealing plate 133. Both the inner and outer surfaces of the composite airbag 131 are provided with composite protective films 132. The inner surface of the composite airbag 131 is fixedly connected to the inner wall of the steel ring 2, and the outer surface of the composite airbag is connected to the inner layer of the composite flexible sealing plate 133. The outer layer of the composite flexible sealing plate 133 abuts against the outer shell of the tunnel boring machine (TBM). The composite airbag 131 expands and fills the gap between the steel ring 2 and the TBM outer shell when the cutterhead of the TBM enters the steel shell 1. The sealing device 13 is annular, ensuring a tight seal between the TBM receiver and the TBM, thus achieving a water-stopping effect. The composite airbag 131 can be replaced with a composite waterbag, with a maximum pressure of 1MPa. The working principle of the sealing device of the present invention is as follows: when the sealing device 13 is not working, the composite airbag 131 is not inflated, the shield machine shell is not in contact with the sealing device 13, and the gap is not sealed; when the sealing device 13 is working, the composite airbag 131 is inflated by injecting gas into the air injection hole 102 through the pressure control device 9. After the airbag inflates, it presses the composite flexible sealing plate tightly onto the shield machine shell. The gap between the shield machine shell and the shield receiver is sealed by this active pressurization method.

[0038] The water-stopping effect of the end processing method used in the prior art is affected by the stratum. The present invention sets up a sealing device, which is combined with a pre-embedded steel shell and a pressure control system. It can be used in a variety of strata, with a stable sealing effect, reducing the impact of the stratum on the shield receiving, and has strong environmental adaptability and applicability.

[0039] The pressurization control system 9 includes a pressure control device 92, an input pipeline 91, and an output pipeline 93. Both the input pipeline 91 and the output pipeline 93 are connected to the pressure control device 92. The input pipeline 91 includes a grout supply pipeline, an air supply pipeline, and a grease supply pipeline corresponding to the grouting hole 101, the air injection hole 102, and the grease injection hole 103. When it is necessary to open or close the corresponding sealing device 13, the pressure control device is controlled to pressurize the air supply pipeline connected to the sealing device 13.

[0040] The support 8 includes a base 83, 200T jacks 82, and brackets 81. The lower part of each steel shell 1 is welded to the bracket 81. 200T jacks 82 are arranged at intervals on the left and right sides under each bracket 81. Each jack is placed on the base 83. The support 8 provides support for the shield receiver. The 200T jacks 82 can be used for precise positioning of the steel shell 1.

[0041] Each of the steel shells is provided with a rib plate 14 on its outer wall, and the rib plates 14 are arranged according to the rigidity of the steel shell 1. The steel shell 1 is also provided with a 300×300mm observation hole 15, through which the grouting situation inside the steel shell 1 can be observed, as well as whether there is any leakage of grout or water.

[0042] The shield receiving method using the shield receiver of the present invention includes the following steps: S1: In the station end shaft, assemble the steel ring, sealing device, and pressure control system according to the reserved installation holes and bolt holes; when the shield machine advances to the tunnel portal, use the pressure control system to start injecting grout into the grouting holes into the steel shell cavity; S2: When the shield machine cutterhead enters the steel shell, use the pressure control system to inject gas into the air injection holes into the composite airbag, so that the composite airbag expands and fills the space between the inner wall of the shield receiver and the outer shell of the shield machine. S3: Until the shield machine cutterhead touches the end plate, the pressure control system injects gas into the air injection holes to inflate the composite airbags in each steel shell, and then removes the end plate; S4: The pressure control system continues to inject grease into the steel shell and continues to inflate and pressurize the composite airbags, so that the composite airbags expand and pressurize the shield machine segments, and grouts are injected behind the retaining piles in the station end shaft through the pre-embedded grouting holes; S5: After the shield is received, the sealing ring beam is poured. After the shield is received, part of the steel ring 2 is removed to give the shield machine enough space to be lifted out, and the steel shell 1 at the tunnel portal is retained.

[0043] In summary, the embodiments of the present invention provide a shield receiver for tunnel engineering, which uses mechanical devices to replace the construction method of end reinforcement to ensure the safety of shield receiving, and is applicable to shield receiving projects under various geological conditions; the steel shells of the present invention are detachably connected, have high applicability, can be reused, and have high economic and practical value; the present invention achieves a water-stopping effect by combining each steel shell with a sealing device and a special pressure control system, and the water-stopping effect is significant.

[0044] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A shield receiver for tunnel engineering, comprising a support (8), wherein the shield receiver is mounted on the support (8), characterized as follows: The shield receiver includes a pressurization control system (9) and multiple steel shells (1) that are detachably and fixedly connected in sequence. Each steel shell (1) is provided with a grouting hole (101) and a grease injection hole (103) that are connected to the pressurization control system (9). Each steel shell (1) includes multiple steel rings (2), which are detachably connected in sequence to form a ring. The steel rings (2) of adjacent steel shells (1) are detachably and fixedly connected. The inner wall of the steel ring (2) is also provided with a sealing device (13) that fits and seals with the cutterhead and the outer shell of the shield machine when the cutterhead of the shield machine enters the steel shell (1). Each of the steel rings (2) has multiple bolt holes (5) reserved for installing the sealing device (13), and each of the steel rings (2) is also provided with an air injection hole (102) connecting the pressure control system (9) and the sealing device (13). The sealing device (13) includes a composite airbag (131) and a composite flexible sealing plate (133). The composite airbag (131) has a composite protective film (132) on both its inner and outer sides. The inner surface of the composite airbag (131) is fixedly connected to the inner wall of the steel ring (2). The outer surface of the composite airbag (131) is connected to the inner layer of the composite flexible sealing plate (133). The outer layer of the composite flexible sealing plate (133) abuts against the outer shell of the tunnel boring machine. The composite airbag (131) can expand and fill the gap between the steel ring (2) and the outer shell of the tunnel boring machine when the cutterhead of the tunnel boring machine enters the steel shell (1).

2. The shield receiver for tunnel engineering according to claim 1, characterized in that: Each of the steel rings (2) is provided with a first flange (61) on its radial edge. Each of the first flanges (61) is provided with a first mounting hole (31). The first mounting holes (31) of adjacent steel rings (2) are arranged opposite to each other and are detachably fixedly connected by a first fastener (41) so that multiple steel rings (2) can be detachably fixedly enclosed to form the steel shell (1).

3. The shield receiver for tunnel engineering according to claim 2, characterized in that: Each of the steel rings (2) has a second flange (62) on its axial edge that is away from the arc center of the steel ring (2). Each of the second flanges (62) has a second mounting hole (32). The second mounting holes (32) of adjacent steel rings (2) are arranged opposite to each other and are detachably fixedly connected by a second fastener (42) so that the adjacent steel shells (1) can be detachably fixedly connected.

4. The shield receiver for tunnel engineering according to claim 3, characterized in that: The second mounting holes (32) are distributed at 5° intervals along the circumference of the second flange (62).

5. The shield receiver for tunnel engineering according to claim 4, characterized in that: A first sealing gasket (71) is attached between adjacent first flanges (61), the first sealing gasket (71) is distributed in a straight line, and the first fastener (41) passes through the first sealing gasket (71); a second sealing gasket (72) is attached between adjacent second flanges (62), the second sealing gasket (72) is distributed in a ring, and the second fastener (42) passes through the second sealing gasket (72).

6. The shield receiver for tunnel engineering according to claim 1, characterized in that: The pressurization control system (9) includes a pressure control device (92), an input pipeline (91), and an output pipeline (93). The input pipeline (91) and the output pipeline (93) are both connected to the pressure control device (92). The input pipeline (91) includes a grout supply pipeline, an air supply pipeline, and an oil supply pipeline corresponding to the grouting hole (101), the air injection hole (102), and the grease injection hole (103).

7. The shield receiver for tunnel engineering according to claim 1, characterized in that: The support (8) includes a base (83), jacks (82) and brackets (81). The lower part of each steel shell (1) is welded to the bracket (81). Jacks (82) are arranged at intervals on the left and right sides of each bracket (81). Each jack is placed on the base (83).

8. A shield receiving method using a shield receiver for tunnel engineering according to any one of claims 1-7, characterized in that, Includes the following steps: S1: Inside the station end shaft, steel rings, sealing devices, and pressure control systems are assembled according to the reserved installation holes and bolt holes; when the tunnel boring machine advances to the tunnel portal, the pressure control system is used to start injecting grout into the grouting holes into the steel shell cavity; S2: When the shield machine cutterhead enters the steel shell, the pressurization control system injects gas into the air injection hole into the composite airbag, so that the composite airbag expands and fills the gap between the inner wall of the shield receiver and the cutterhead and the outer shell of the shield machine. At the same time, the pressurization control system injects grease into the grease injection hole into the steel shell. S3: Until the tunnel boring machine cutterhead reaches the end plate, the pressurization control system injects gas into the air injection holes to inflate the composite airbags in each steel shell, and then removes the end plate. S4: The pressurization control system continuously injects grease into the steel shell and continues to inflate and pressurize the composite airbag, so that the composite airbag expands and presses tightly onto the tunnel lining segments of the tunnel boring machine, and grouts are injected behind the retaining piles in the station end well through the pre-embedded grouting holes. S5: Cast a sealing ring beam after the shield tunneling machine is received.

9. The shield receiving method for a shield receiver used in tunnel engineering according to claim 8, wherein step S5 is characterized in that: After the shield receiving work is completed, part of the steel ring (2) is removed to allow the shield machine to have enough space to be lifted out, and the steel shell (1) at the tunnel entrance is retained.

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