Shield tunneling machine arrival tunnel portal receiving device

Abstract

The utility model discloses a shield tunneling machine arrival tunnel portal receiving device which comprises an embedded tunnel portal ring, an outer ring plate, an external tunnel portal ring and a sealing device, and the sealing device comprises an annular rigid sealing component and an annular flexible sealing component. The annular flexible sealing component comprises an annular rubber cord fabric plate and a plurality of cord fabric pressing plates; the end, facing the hole opening, of the pre-buried tunnel portal ring extends in the axis direction and is coaxially and fixedly provided with an annular mounting plate after exceeding the outer ring plate, and the mounting plate and the outer ring plate are oppositely arranged. The annular rubber cord fabric plate is fixed to the side, away from the outer ring plate, of the mounting plate, an annular inner baffle opposite to the mounting plate is fixedly arranged at the end, facing the mounting plate, of the external tunnel portal ring, and the annular inner baffle presses the annular rubber cord fabric plate; a plurality of cord fabric pressing plates are fixedly arranged on one side, far away from the annular rubber cord fabric plate, of the annular inner baffle and are annularly and uniformly distributed; an annular steel wire crocheted net is fixedly arranged on the side, away from the cord fabric pressing plate, of the annular rubber cord fabric plate, modified fibers are arranged between the steel wire crocheted net and the annular rubber cord fabric plate, and the modified fibers are coated with grease. The modified fibers are arranged on the annular rubber cord fabric plate and coated with grease, it is guaranteed that the modified fibers are tightly attached to the shield shell, the annular rubber cord fabric plate is prevented from being damaged, and the problem that an existing receiving device cannot completely seal water burst of a tunnel portal is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield tunneling, in particular to a receiving device for a shield machine arriving at a tunnel gate. Background Art

[0002] As an important means of infrastructure construction such as urban subways, water conservancy projects, and underground roads, shield tunnel construction technology has been highly valued by the engineering community for its construction efficiency and safety. In the entire tunneling process of the shield machine, starting and receiving are two key links, especially the receiving process, which is directly related to the smooth completion of the project and construction safety.

[0003] Conventional existing tunnel door seals use sealing devices in the form of folding flaps and rubber curtain plate structures. For example, a shield tunnel door sealing device disclosed in a Chinese invention patent (authorization publication number CN106837359B) includes a pre-buried tunnel door ring installed at the shield tunnel door, the cylindrical ring body of the pre-buried tunnel door ring is pre-buried in the inner ring surface of the tunnel entrance where the shield reaches the tunnel, and the outer ring plate is pre-buried in the outer end surface of the tunnel entrance to form a steel ring support structure with a transverse L-shaped cross section. The sealing device includes an annular rigid sealing component, an annular flexible sealing component, an external tunnel door ring and an annular sealing steel plate. The annular rigid sealing component is composed of two annular steel plates welded on the inner ring surface of the cylindrical ring body of the pre-buried tunnel door ring and a filling sponge embedded between the two annular steel plates. The annular flexible sealing component is composed of an annular The invention is composed of a rubber curtain and a plurality of curtain pressure plates, wherein the annular rubber curtain is fixed on the outer ring plate of the embedded tunnel gate ring, an annular inner baffle is provided on one side of the external tunnel gate ring, and the rubber curtain fixed on the outer ring plate is pressed by the annular inner baffle, and a plurality of curtain pressure plates are installed on the outer surface of the annular inner baffle, and the plurality of curtain pressure plates are distributed in an annular shape outside the annular inner baffle, and the curtain pressure plates and the annular rubber curtain are fixed on the outer ring plate of the embedded tunnel gate ring by connecting components, and the other side of the plurality of curtain pressure plates are connected in series into an annular shape by steel wire ropes; the diameter of the external tunnel gate ring is larger than the cylindrical ring body of the embedded tunnel gate ring, and when the shield tail of the shield machine reaches the tunnel gate, an annular sealing steel plate is welded between the shield tail of the shield machine and the external tunnel gate ring. In actual use, the head of the shield machine will squeeze the rubber curtain plate after contacting the receiving device. On the one hand, the rubber curtain plate cannot be tightly sealed with the shield shell, and on the other hand, the cutter head of the shield machine is easy to damage the rubber curtain plate and cause water leakage. Therefore, the existing shield machine receiving device has the problem of being unable to completely seal the water inrush from the tunnel portal. Utility Model Content

[0004] The utility model provides a receiving device for a shield machine to reach a tunnel gate, so as to solve the technical problem that the existing receiving device for the shield machine cannot completely seal the water gushing from the tunnel gate.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A receiving device for a tunnel portal of a shield machine comprises: a pre-buried tunnel portal ring, an outer ring plate, an external tunnel portal ring and a sealing device, wherein the sealing device comprises: an annular rigid sealing component and an annular flexible sealing component; the annular flexible sealing component comprises: an annular rubber curtain plate and a plurality of curtain pressure plates; an end of the pre-buried tunnel portal ring extending toward the tunnel opening along the axial direction and exceeding the outer ring plate is coaxially fixed with an annular mounting plate, and the mounting plate is arranged opposite to the outer ring plate; the annular rubber curtain plate is fixed to a side of the mounting plate away from the outer ring plate, and an annular inner baffle plate arranged opposite to the mounting plate is fixed to one end of the external tunnel portal ring facing the mounting plate, and the annular inner baffle plate presses the annular rubber curtain plate; a plurality of curtain pressure plates are fixed to a side of the annular inner baffle plate away from the annular rubber curtain plate, and the plurality of curtain pressure plates are evenly distributed in an annular shape; an annular steel wire chain link fence is fixed to a side of the annular rubber curtain plate away from the curtain pressure plate, and modified fibers are arranged between the steel wire chain link fence and the annular rubber curtain plate, and grease is coated on the modified fibers.

[0007] Furthermore, two circles of sealing steel brushes are provided on the inner wall of the embedded tunnel gate ring, and the two circles of sealing steel brushes are arranged at intervals along the axial direction of the embedded tunnel gate ring. The brush heads of the sealing steel brushes can abut against the shield shell of the shield machine; the embedded tunnel gate ring is also provided with a grease injection component, which passes through the embedded tunnel gate ring and is connected to between the two circles of sealing steel brushes.

[0008] Furthermore, the annular rigid sealing component is located between the sealing steel brush and the wire chain link fence; the annular rigid sealing component includes: a circular tube coaxially arranged in the embedded tunnel gate ring, two annular steel plates and a filling sponge located between the embedded tunnel gate ring and the circular tube; the two annular steel plates are spaced apart along the axial direction of the embedded tunnel gate ring, and the inner wall of the embedded tunnel gate ring, the two annular steel plates and the circular tube form an annular cavity, and the filling sponge is filled into the annular cavity.

[0009] Furthermore, a spring hinge is provided on the side of the curtain pressure plate away from the annular inner baffle plate; the curtain pressure plate is divided into a fixed part corresponding to the annular inner baffle plate and a movable part extending radially along the annular inner baffle plate to the embedded hole door ring; the rotation axis of the spring hinge is arranged perpendicular to the radial direction of the annular inner baffle plate, and the two blades of the spring hinge are respectively fixedly connected to the fixed part and the movable part.

[0010] Furthermore, an annular outer baffle is fixedly installed at one end of the external hole door ring away from the mounting plate, and the annular outer baffle is arranged opposite to the annular inner baffle; a plurality of cleaning devices are fixedly arranged on the annular outer baffle, and the plurality of cleaning devices are evenly distributed in a ring shape; the cleaning device includes: a mounting seat, a water pipe and a nozzle; the mounting seat is fixed on the annular outer baffle, the water pipe and the nozzle are installed on the mounting seat, the nozzle is arranged along the radial direction of the external hole door ring, and the water pipe is connected to the nozzle.

[0011] Furthermore, a plurality of reinforcing components are arranged on the outer periphery of the embedded hole door ring. The reinforcing components include a threaded steel pipe and a flange fixed to the end of the threaded steel pipe. The threaded steel pipe is provided with a grouting hole.

[0012] Beneficial effects:

[0013] The present application discloses a receiving device for a shield machine reaching a tunnel portal. The receiving device arranges modified fibers on an annular rubber curtain plate, so that the head of the shield machine first squeezes the modified fibers and then squeezes the annular rubber curtain plate, thereby ensuring that the modified fibers and the shield shell are tightly fitted to achieve sealing; and grease is coated on the modified fibers, so that the grease forms a water-stop barrier between the modified fibers and the shield shell to achieve sealing; and the grease coated on the modified fibers can assist the shield machine in advancing, and prevent the shield machine's cutter head from damaging the annular rubber curtain plate and causing water leakage. Therefore, the receiving device solves the problem that the existing receiving device for shield machines cannot completely seal the water inflow from the tunnel portal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 This is a schematic diagram of the structure of a receiving device for a shield machine arriving at a tunnel gate disclosed in the utility model. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of a receiving device for a shield machine arriving at a tunnel gate disclosed in the utility model. Figure 2 ;

[0017] Figure 3 for Figure 1 A partial enlarged view of middle A;

[0018] Figure 4 It is a front view of an annular flexible sealing component of a receiving device for a shield machine reaching a tunnel gate disclosed in the utility model;

[0019] Figure 5 It is a rear view of an annular flexible sealing component of a receiving device for a shield machine reaching a tunnel gate disclosed in the utility model;

[0020] Figure 6 It is a structural schematic diagram of an annular rigid sealing component of a receiving device for a shield machine reaching a tunnel gate disclosed in the utility model;

[0021] Figure 7It is a structural schematic diagram of a curtain cloth pressing plate of a receiving device for a shield machine reaching a tunnel gate disclosed in the utility model;

[0022] Figure 8 It is a structural schematic diagram of a cleaning device for a receiving device of a shield machine reaching a tunnel gate disclosed in the utility model;

[0023] Fig. 9 for Figure 2 Cross-sectional view of the middle BB;

[0024] Fig.10 The utility model discloses a structural schematic diagram of a reinforcement component of a receiving device for a shield machine reaching a tunnel gate.

[0025] 1. Pre-buried hole door ring; 11. Mounting plate; 12. Reinforcement sleeve; 2. Outer ring plate;

[0026] 3. External door knocker; 31. Annular inner baffle; 32. Annular outer baffle;

[0027] 41. annular rigid sealing member; 411. round tube; 412. annular steel plate; 413. filling sponge; 42. annular flexible sealing member; 421. annular rubber curtain plate; 422. curtain pressure plate; 4221. fixed part; 4222. movable part; 423. spring hinge;

[0028] 5. Chain link fence; 6. Modified fiber; 7. Sealing steel brush; 8. Grease injection component;

[0029] 91. Mounting seat; 92. Water pipe; 93. Nozzle; 10. Reinforcement member; 101. Threaded steel pipe; 102. Flange; 103. Grouting hole. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] A receiving device for a shield machine arriving at a tunnel gate, combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, it comprises: a pre-buried hole door ring 1, an outer ring plate 2, an external hole door ring 3 and a sealing device, the sealing device comprises: an annular rigid sealing component 41 and an annular flexible sealing component 42; the annular flexible sealing component 42 comprises: an annular rubber curtain plate 421 and a plurality of curtain pressure plates 422; the end of the pre-buried hole door ring 1 extending toward the hole along the axial direction and exceeding the outer ring plate 2 is coaxially fixed with an annular mounting plate 11, and the mounting plate 11 is arranged opposite to the outer ring plate 2; the annular rubber curtain plate 421 is fixed on the side of the mounting plate 11 away from the outer ring plate 2, and the external hole door ring 3 is provided with a sealing device. An annular inner baffle plate 31 is fixedly arranged at one end of the tunnel door ring 3 facing the mounting plate 11 and is arranged opposite to the mounting plate 11, and the annular inner baffle plate 31 presses the annular rubber curtain plate 421; a plurality of curtain pressure plates 422 are fixedly arranged on the side of the annular inner baffle plate 31 away from the annular rubber curtain plate 421, and the plurality of curtain pressure plates 422 are evenly distributed in an annular shape; an annular steel wire chain link fence 5 is fixedly arranged on the side of the annular rubber curtain plate 421 away from the curtain pressure plate 422, and a modified fiber 6 is arranged between the steel wire chain link fence 5 and the annular rubber curtain plate 421, and grease is coated on the modified fiber 6. When the shield machine reaches the tunnel portal, the head of the shield machine squeezes the steel wire mesh 5 and then squeezes the modified fiber 6, and the modified fiber 6 is deformed; the head of the shield machine continues to move, causing the annular rubber curtain plate 421 to deform and swing, and the annular rubber curtain plate 421 presses the modified fiber 6 so that the modified fiber 6 fits tightly with the shield shell of the shield machine, overcoming the problem that the existing receiving device cannot fit tightly with the shield shell due to the material problem of the annular rubber curtain plate 421. Grease is coated on the modified fiber 6, and the modified fiber 6 is squeezed so that the grease is precipitated to form a water-stopping barrier between the modified fiber 6 and the shield shell, thereby enhancing the sealing effect. Moreover, after the grease is precipitated, it can lubricate the shield shell of the shield machine and assist the shield machine in advancing, preventing the cutter head of the shield machine from contacting the annular rubber curtain plate 421 and damaging the annular rubber curtain plate 421, and avoiding water gushing due to damage to the annular rubber curtain plate 421.

[0032] Specifically, after the modified fiber 6 is placed on the annular rubber curtain plate 421, the steel chain link fence 5 is pressed onto the modified fiber 6, and the steel chain link fence 5 is fixed to the annular rubber curtain plate 421 by thin steel wires. In this embodiment, the annular rubber curtain plate 421 is provided with a plurality of threading channel entrances and threading channel exits around the surface of the modified fiber 6, and the threading channel entrances and threading channel exits are connected by a threading channel, and the threading channel is located inside the annular rubber curtain plate 421. The thin steel wire enters the threading channel entrance and exits the threading channel exit, and then passes through the steel chain link fence 5, and the thin steel wire is tightened to fix the steel chain link fence 5.

[0033] Specifically, the outer ring plate 2 is sleeved on the embedded hole door ring 1 and is close to the hole opening, the mounting plate 11 is sleeved on the embedded hole door ring 1 and is aligned with its protruding end surface, and a reinforcing sleeve 12 is provided between the outer ring plate 2 and the mounting plate 11. The two end surfaces of the reinforcing sleeve 12 respectively abut against the outer ring plate 2 and the mounting plate 11, and the reinforcing sleeve 12 enhances the rigidity of the structure. In this embodiment, the embedded hole door ring 1, the outer ring plate 2, the mounting plate 11 and the reinforcing sleeve 12 are all fixed by welding.

[0034] Preferably, two circles of sealing steel brushes 7 are provided on the inner wall of the embedded tunnel door ring 1, and the two circles of sealing steel brushes 7 are arranged at intervals along the axial direction of the embedded tunnel door ring 1, and the brush heads of the sealing steel brushes 7 can abut against the shield shell of the shield machine; the embedded tunnel door ring 1 is also provided with a grease injection component 8, which passes through the embedded tunnel door ring 1 and is connected to the space between the two circles of sealing steel brushes 7. The grease injection component 8 injects grease between the two circles of sealing steel brushes 7, and forms a grease sealing ring under the obstruction of the two circles of sealing steel brushes 7 and the shield shell of the shield machine, further realizing the sealing between the shield shell of the shield machine and the inner wall of the embedded tunnel door ring 1, and preventing most of the water in the tunnel from rushing to the sealing device.

[0035] Specifically, the sealing steel brush 7 is fixed to the inner wall of the embedded hole door ring 1 by welding, and the embedded hole door ring 1 and the reinforcement sleeve 12 are provided with oil injection holes, and the oil injection holes are located between the two circles of sealing steel brushes 7. The grease injection component 8 passes through the oil injection hole on the reinforcement sleeve 12 and is inserted into the oil injection hole on the embedded hole door ring 1, and the grease injection component 8 is sealed with the oil injection hole. The grease injection component 8 is connected to an external oil pump, and the oil pump injects grease between the two circles of sealing steel brushes 7 through the grease injection component 8.

[0036] Preferably, combined Figure 1 , Figure 3 and Figure 6 As shown, the annular rigid sealing member 41 is located between the sealing steel brush 7 and the steel wire chain link fence 5; the annular rigid sealing member 41 comprises: a circular tube 411 coaxially arranged in the pre-buried tunnel door ring 1, two annular steel plates 412 and a filling sponge 413 between the pre-buried tunnel door ring 1 and the circular tube 411; the two annular steel plates 412 are arranged at intervals along the axial direction of the pre-buried tunnel door ring 1, and the inner wall of the pre-buried tunnel door ring 1, the two annular steel plates 412 and the circular tube 411 form an annular cavity, and the filling sponge 413 is filled into the annular cavity. The annular steel plate 412 is deformed and turned outward under the action of the shield machine, so that the circular tube 411 fits with the shield shell of the shield machine, further blocking the water in the tunnel from rushing to the annular flexible sealing member 42.

[0037] Preferably, combined Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 7As shown, a spring hinge 423 is provided on one side of the curtain pressure plate 422 away from the annular inner baffle 31; the curtain pressure plate 422 is divided into a fixed portion 4221 corresponding to the annular inner baffle 31 and a movable portion 4222 radially extending from the annular inner baffle 31 to the pre-buried hole door ring 1; the rotation axis of the spring hinge 423 is perpendicular to the radial direction of the annular inner baffle 31, and the two blades of the spring hinge 423 are respectively fixedly connected to the fixed portion 4221 and the movable portion 4222. The spring hinge 423 applies a force to the movable portion 4222, so that the movable portion 4222 has a tendency to restore the original state, so that the movable portion 4222 presses the modified fiber 6 to ensure that the modified fiber 6 is close to the shield shell of the shield machine.

[0038] Specifically, the mounting plate 11, the annular rubber curtain plate 421, the annular inner baffle plate 31 and the fixing portion 4221 of the curtain pressure plate 422 are fixed by bolts and nuts. The mounting plate 11, the annular rubber curtain plate 421 and the annular inner baffle plate 31 are provided with a plurality of first through holes, and the plurality of through holes are arranged in an annular shape. The fixing portion 4221 of the curtain pressure plate 422 is provided with a second through hole corresponding to the first through hole, and the bolts are passed through the first through hole and the second through hole and then the nuts are installed to fix the mounting plate 11, the annular rubber curtain plate 421, the annular inner baffle plate 31 and the fixing portion 4221 of the curtain pressure plate 422 together.

[0039] Preferably, combined Figure 1 , Figure 3 and Figure 8 As shown, an annular outer baffle plate 32 is fixedly mounted on one end of the external tunnel ring 3 away from the mounting plate 11, and the annular outer baffle plate 32 is arranged opposite to the annular inner baffle plate 31; a plurality of cleaning devices are fixedly mounted on the annular outer baffle plate 32, and the plurality of cleaning devices are evenly arranged in an annular shape; the cleaning device comprises: a mounting seat 91, a water pipe 92 and a nozzle 93; the mounting seat 91 is fixedly mounted on the annular outer baffle plate 32, the water pipe 92 and the nozzle 93 are mounted on the mounting seat 91, the nozzle 93 is arranged along the radial direction of the external tunnel ring 3, and the water pipe 92 is connected to the nozzle 93. The water pipe 92 supplies water to the nozzle 93, and the nozzle 93 sprays the head, the shield shell and the tail of the shield machine in turn to achieve preliminary cleaning of the shield machine.

[0040] Preferably, combined Figure 1 , Figure 3 , Fig. 9 and Fig.10 As shown, the outer periphery of the embedded hole door ring 1 is provided with a plurality of reinforcing members 10, the reinforcing members 10 include a threaded steel pipe 101 and a flange 102 fixed to the end of the threaded steel pipe 101, and a grouting hole 103 is provided on the threaded steel pipe 101. Holes are drilled at predetermined positions around the hole, and after the reinforcing members 10 are installed in the holes, slurry is sprayed out through the grouting holes 103 at high pressure by a high-pressure pump to achieve reinforcement of the hole.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A receiving device for a shield machine arriving at a tunnel gate, comprising: A pre-buried tunnel door ring (1), an outer ring plate (2), an external tunnel door ring (3) and a sealing device, wherein the sealing device comprises: an annular rigid sealing component (41) and an annular flexible sealing component (42); the annular flexible sealing component (42) comprises: an annular rubber curtain plate (421) and a plurality of curtain pressure plates (422); the characteristic is that the end of the pre-buried tunnel door ring (1) extending toward the tunnel opening along the axial direction and beyond the outer ring plate (2) is coaxially fixed with an annular mounting plate (11), the mounting plate (11) being arranged opposite to the outer ring plate (2); the annular rubber curtain plate (421) is fixed to a side of the mounting plate (11) away from the outer ring plate (2); the external tunnel door ring ( 3) An annular inner baffle (31) is fixedly provided at one end facing the mounting plate (11) and is arranged opposite to the mounting plate (11), and the annular inner baffle (31) presses the annular rubber curtain plate (421); a plurality of curtain pressing plates (422) are fixedly provided on a side of the annular inner baffle (31) away from the annular rubber curtain plate (421), and the plurality of curtain pressing plates (422) are evenly arranged in an annular shape; an annular steel wire chain link fence (5) is fixedly provided on a side of the annular rubber curtain plate (421) away from the curtain pressing plate (422), and a modified fiber (6) is provided between the steel wire chain link fence (5) and the annular rubber curtain plate (421), and grease is applied to the modified fiber (6).

2. A shield machine arrival tunnel portal receiving device according to claim 1, characterized in that: The inner wall of the embedded tunnel door ring (1) is provided with two circles of sealing steel brushes (7), the two circles of sealing steel brushes (7) are arranged at intervals along the axial direction of the embedded tunnel door ring (1), and the brush heads of the sealing steel brushes (7) can abut against the shield shell of the shield machine; the embedded tunnel door ring (1) is also provided with a grease injection component (8), the grease injection component (8) passes through the embedded tunnel door ring (1) and is connected to between the two circles of sealing steel brushes (7).

3. A shield machine arrival tunnel portal receiving device according to claim 2, characterized in that: The annular rigid sealing component (41) is located between the sealing steel brush (7) and the steel chain link fence (5); the annular rigid sealing component (41) comprises: a circular tube (411) coaxially arranged in the pre-buried hole door ring (1), two annular steel plates (412) and a filling sponge (413) located between the pre-buried hole door ring (1) and the circular tube (411); the two annular steel plates (412) are arranged at intervals along the axial direction of the pre-buried hole door ring (1); the inner wall of the pre-buried hole door ring (1), the two annular steel plates (412) and the circular tube (411) form an annular cavity, and the filling sponge (413) is filled into the annular cavity.

4. A shield machine arrival tunnel portal receiving device according to claim 1, characterized in that: A spring hinge (423) is provided on a side of the curtain pressure plate (422) away from the annular inner baffle (31); the curtain pressure plate (422) is divided into a fixed portion (4221) corresponding to the annular inner baffle (31) and a movable portion (4222) extending radially along the annular inner baffle (31) into the pre-buried hole door ring (1); the rotation axis of the spring hinge (423) is arranged perpendicular to the radial direction of the annular inner baffle (31), and two blades of the spring hinge (423) are respectively fixedly connected to the fixed portion (4221) and the movable portion (4222).

5. The shield machine arrival tunnel portal receiving device according to claim 1, characterized in that: An annular outer baffle plate (32) is fixedly mounted on one end of the external hole door ring (3) away from the mounting plate (11), and the annular outer baffle plate (32) is arranged opposite to the annular inner baffle plate (31); A plurality of cleaning devices are fixedly arranged on the annular outer baffle plate (32), and the plurality of cleaning devices are evenly distributed in an annular shape; the cleaning devices comprise: a mounting seat (91), a water pipe (92) and a nozzle (93); the mounting seat (91) is fixedly arranged on the annular outer baffle plate (32), the water pipe (92) and the nozzle (93) are mounted on the mounting seat (91), the nozzle (93) is arranged along the radial direction of the external hole door ring (3), and the water pipe (92) is connected to the nozzle (93).

6. A shield machine arrival tunnel portal receiving device according to claim 1, characterized in that: A plurality of reinforcing components (10) are provided on the outer periphery of the embedded hole door ring (1), the reinforcing components (10) comprising a threaded steel pipe (101) and a flange (102) fixed to the end of the threaded steel pipe (101), and a grouting hole (103) is provided on the threaded steel pipe (101).

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