Shield receiving sealing device and using method thereof

Abstract

The invention relates to the technical field of shield construction, in particular to a shield receiving and sealing device which comprises an annular plate assembly, a sealing assembly, an expansion assembly and a guide-out assembly, the annular plate assembly is pre-arranged in a receiving tunnel portal, the sealing assembly is arranged on the inner wall of the annular plate assembly, the expansion assembly is arranged outside a tunnel opening of the receiving tunnel portal, and the guide-out assembly is arranged on the guide-out assembly. The expansion assembly is arranged at the top of the receiving tunnel portal in a sliding mode and used for expanding the inner diameter of the sealing assembly outwards in the radial direction of the receiving tunnel portal so that a shield shell of a shield tunneling machine can enter an inner hole of the sealing assembly smoothly, and the guiding-out assembly is arranged at the top of the expansion assembly in a sliding mode and used for receiving soil residues when the shield tunneling machine drills out of the receiving tunnel portal so that the sealing assembly can be prevented from being damaged by smashing. The pressure of underground water and slurry is converted into the pressure applied to the outside of the shield shell of the shield tunneling machine by the first air bag through the sealing assembly, the sealing performance is guaranteed, and the situation that when an existing shield tunneling machine breaks soil, soil residues directly hit an annular cord fabric rubber plate, and the sealing effect is affected is avoided through the guiding-out assembly.

Description

Technical Field

[0001] The invention relates to the technical field of shield construction, in particular to a shield receiving sealing device and a use method thereof. Background Art

[0002] The existing conventional tunnel portal sealing mechanism is mainly composed of an annular curtain rubber plate, an annular pressure plate and a folding plate. This sealing device of the annular curtain rubber plate combined with the annular pressure plate and the folding plate can only achieve a sealing effect in a stable soil layer. However, in complex strata with high water content such as sand layers and pebble layers, the existing sealing mechanism often causes varying degrees of leakage in the on-site tunnel portal because the annular curtain rubber plate of the shield machine cannot fit tightly with the shield machine casing.

[0003] On the other hand, the above-mentioned sealing device is usually arranged at the receiving portal, but because the soil in the receiving portal and the concrete sealing the receiving portal have an open space such as a receiving well on their outer side, they lose the supporting force from the outside to the inside. When the shield machine breaks out of the ground, a large amount of soil in the receiving portal and the concrete sealing the receiving portal will collapse directly to the outside under the jacking action of the shield machine during shield excavation, and then directly fall on the annular cord rubber plate below, causing damage to the annular cord rubber plate, affecting the sealing effect and the reliability of subsequent secondary use. Summary of the invention

[0004] In order to solve the problems that the annular curtain rubber plate of the existing shield machine cannot fit tightly with the shield machine shell when the shield machine exits the tunnel, and a large amount of contact soil and concrete directly falls on the annular curtain rubber plate when exiting the tunnel, thereby affecting the sealing effect and the reliability of subsequent secondary utilization, the present invention provides a shield receiving sealing device and a use method thereof to solve the above problems.

[0005] To achieve the above object, the present invention provides the following technical solutions: A shield receiving sealing device, comprising a ring plate assembly, a sealing assembly, an expansion assembly and a lead-out assembly, wherein the ring plate assembly is preset in a receiving tunnel door, the sealing assembly is arranged on the inner wall of the ring plate assembly, the expansion assembly is arranged outside the hole of the receiving tunnel door, and is used to expand the inner diameter of the sealing assembly outwardly along the radial direction of the receiving tunnel door, so that the shield shell of the shield machine can smoothly enter the inner hole of the sealing assembly, and the lead-out assembly is slidably arranged on the top of the expansion assembly, and is used to receive soil debris when the shield machine drills out of the receiving tunnel door, so as to avoid damaging the sealing assembly; The ring plate assembly comprises a pre-buried steel ring plate, the outer wall of which is matched with the inner wall of the receiving hole door; The sealing assembly comprises a plurality of baffles which are sequentially installed around the inner wall of the embedded steel ring plate along the axial direction thereof, and a first airbag and a second airbag, wherein the baffle is located on a side of the embedded steel ring plate away from the receiving tunnel portal, and both ends of the inner side edge of the baffle are rotatably connected with hinged plates, and the first airbag and the second airbag are integrally formed, wherein the cross section of the first airbag is canine-shaped and the sharp part of the canine teeth faces the shield tunneling direction of the shield machine, the cross section of the second airbag is heel-shaped, and an inner concave annular groove is formed between the bottom of the second airbag and the bottom of the first airbag, the upper and lower sides of the first airbag are connected with a first inflation valve, the side sides of the first airbag are connected with a first exhaust valve, the upper and lower sides of the second airbag are connected with a second inflation valve, and the side sides of the second airbag are connected with a second exhaust valve; The expansion assembly includes a steel rail laid outside the receiving tunnel opening along the axial direction of the embedded steel ring plate, a reaction frame is installed on the top of one end of the steel rail, a second hydraulic cylinder is connected to one side of the reaction frame, the other end of the second hydraulic cylinder is connected to a base, brackets are installed on both sides of one end of the base, guide rail modules are installed on the upper and lower sides of the bracket, expansion plates are installed on one end of the guide rail module mover, and the other end of the guide rail module mover is connected to the first hydraulic cylinder, and the cylinder bodies of the first hydraulic cylinders are respectively installed on the outer ends of the stators of the guide rail modules; The export assembly includes a pair of slide bars installed in parallel on the top of the base, and a third hydraulic cylinder installed on both sides of the top of the base. A hopper is provided above the slide bar, and slide grooves are installed on both sides of the bottom of the hopper. The slide grooves are respectively matched with the top of the slide bar, and the telescopic ends of the third hydraulic cylinder are respectively connected to the outside of the slide groove.

[0006] As a preferred solution of the present invention, the ring plate assembly further comprises a water stop plate embedded in the concrete of the receiving tunnel, and the inner hole of the water stop plate is installed on the outside of the embedded steel ring plate.

[0007] As a preferred solution of the present invention, a plurality of anchor bars are provided at intervals around the outer portion of the embedded steel ring plate.

[0008] As a preferred solution of the present invention, the expansion sheets can be folded together to form a complete cylindrical structure, and the axial center line of the cylindrical structure coincides with the axial center lines of the first airbag and the second airbag.

[0009] As a preferred solution of the present invention, the expansion assembly further comprises support legs installed on both sides of the bottom of the base, and a plurality of load-bearing wheels matching with the top of the rail are provided at intervals at the bottom of the support legs.

[0010] As a preferred solution of the present invention, the expansion assembly also includes a kick wheel installed at the bottom of one end of the support leg close to the reaction frame, the cross-section of the rail is I-shaped, and the inside of the kick wheel cooperates with the outside of the flange part on the rail.

[0011] As a preferred solution of the present invention, it also includes an air pump station, and the air outlet of the air pump station is connected to the air inlet of the first inflation valve and the second inflation valve respectively through pipelines.

[0012] As a preferred solution of the present invention, it also includes a hydraulic station, and the inlet and outlet valves of the hydraulic station are respectively connected to the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder through oil pipes.

[0013] A method for using a shield receiving sealing device comprises the following steps: Step 1: Install and connect the baffle, hinged plate, first airbag and second airbag with the embedded steel ring plate according to the designed structure. When pouring the receiving tunnel door, embed the embedded steel ring plate, water stop plate and anchor bar in the poured concrete, and ensure that the first inflation valve, the first exhaust valve, the second inflation valve and the second exhaust valve are unobstructed after being buried; Step 2: Lay rails outside the receiving tunnel along the axial direction of the embedded steel ring plate, and arrange the base and the structure for mounting and connecting the rails in sequence, wherein the laying height of the rails is calculated in advance so that the axial center line of the cylindrical structure formed by the expansion sheets coincides with the axial center line of the first airbag and the second airbag; Step 3: Connect the air outlet of the air pump station to the air inlets of the first and second air charging valves through pipelines, and connect the inlet and outlet valves of the hydraulic station to the first, second and third hydraulic cylinders through oil pipes; Step 4: When the shield machine excavates to within five meters of the embedded steel ring plate, a certain amount of gas is respectively filled into the first airbag and the second airbag, and then the second hydraulic cylinder is extended to push the expansion piece into the embedded steel ring plate until it passes over the first airbag and the second airbag and stops. When the shield machine excavates to within 1.5 meters of the embedded steel ring plate, the first hydraulic cylinder is synchronously contracted so that each expansion piece synchronously expands the inner diameter of the first airbag and the second airbag outward along the radial direction of the receiving tunnel door, wherein the radius increment of the first airbag and the second airbag is at least 1 times the thickness of the expansion piece. At the same time, the third hydraulic cylinder is extended to move the hopper into the receiving tunnel door; Step 5: After the shield machine completely breaks out of the ground in the receiving tunnel, the shield excavation is stopped in time. At this time, the fallen soil debris has fallen into the hopper by itself, and the second hydraulic cylinder and the third hydraulic cylinder are contracted synchronously to make the expansion plate and the hopper completely withdrawn from the receiving tunnel. At the same time, the first airbag and the second airbag are filled with gas again until saturated. At this time, the inner walls of the first airbag and the second airbag will be completely attached to the outside of the shield shell of the shield machine, so as to achieve the sealing of the annular gap between the shield machine and the receiving tunnel door; Step 6: Remove the expansion components and export the component equipment. After laying the equipment components required to receive the shield machine, complete the reception of the shield machine.

[0014] As a preferred solution of the present invention, in step 4, the inflation volume of the first airbag is its saturated inflation volume.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by filling the inside of the first airbag and the second airbag with gas, they will be tightly attached to the outside of the shield shell of the shield machine. Since the cross-section of the first airbag is canine-shaped and the sharp part of the canine teeth faces the shield excavation direction of the shield machine, once a large amount of groundwater and entrained mud gush out, pressure will be applied to the inner bend of the first airbag through the folding plate. Combined with the special canine tooth shape, the pressure is converted into pressure applied by the first airbag to the outside of the shield shell of the shield machine, thereby improving the seal between the shield machine and the embedded steel ring plate when receiving the shield machine and alleviating leakage. At the same time, the friction between the second airbag and the shield machine is utilized, so that the first airbag maintains contact with the shield machine when subjected to groundwater and mud pressure and will not be flushed open, further ensuring the reliability of the seal.

[0016] In the present invention, the laying height of the rails is calculated in advance so that the axial center line of the cylindrical structure formed by the expansion pieces coincides with the axial center line of the first airbag and the second airbag. When the shield machine advances to a certain distance from the embedded steel ring plate, the expansion piece is pushed into the interior of the embedded steel ring plate, and the first hydraulic cylinder contracts synchronously so that each expansion piece synchronously expands the inner diameter of the first airbag and the second airbag outward along the radial direction of the receiving tunnel portal. Through the expansion effect of the expansion component, when the shield machine enters the first airbag, the design of the sharp canine teeth facing the shield excavation direction will not be destroyed, which is beneficial to ensure that the subsequent groundwater and mud pressure is converted into the pressure applied by the first airbag to the outside of the shield shell of the shield machine, and further helps to ensure the sealing.

[0017] In the present invention, the soil in the receiving tunnel door and the concrete sealing the receiving tunnel door are received by a hopper that can enter and exit the receiving tunnel door, thereby avoiding the situation that when the existing shield machine breaks out of the ground, the soil in the receiving tunnel door and the concrete sealing the receiving tunnel door will collapse outward under the action of the shield machine during shield excavation, thereby directly falling on the annular cord rubber plate, causing damage to the annular cord rubber plate, affecting the sealing effect, and the reliability of subsequent secondary utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 for Figure 1 Another perspective diagram of the structure; Figure 3 It is a schematic diagram of the structure of the ring plate assembly and the sealing assembly of the present invention; Figure 4 for Figure 3 Another perspective diagram of the structure; Figure 5 for Figure 4 The enlarged view of point A in the middle; Figure 6 Schematic diagram of the sealing state between the sealing assembly and the shield machine in an embodiment of the present invention; Figure 7 It is a schematic diagram of the expansion component and the export component structure of the present invention; Figure 8 for Figure 7 The enlarged view of point B in the middle; Fig. 9 for Figure 7 Enlarged view of point C in the middle.

[0019] Among them, 1. Ring plate assembly; 101. Embedded steel ring plate; 102. Water stop plate; 103. Anchor bar; 2. Sealing assembly; 201. Baffle; 202. Folding plate; 203. First air bag; 204. First inflation valve; 205. First exhaust valve; 206. Second air bag; 207. Second inflation valve; 208. Second exhaust valve; 3. Expansion assembly; 301. Expansion sheet; 302. Guide rail module; 303. First hydraulic cylinder; 304. Bracket; 305. Base; 306. Support leg; 307. Load-bearing wheel; 308. Buckle wheel; 309. Rail; 310. Second hydraulic cylinder; 311. Reaction frame; 4. Export assembly; 401. Slide; 402. Hopper; 403. Chute; 404. Third hydraulic cylinder; 5. Air pump station; 6. Hydraulic station; 7. Shield machine. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0021] like Figure 1-2As shown, an embodiment of the present invention provides a shield receiving sealing device, including a ring plate assembly 1, a sealing assembly 2, an expansion assembly 3 and an outlet assembly 4, the ring plate assembly 1 is preset in the receiving tunnel door, the sealing assembly 2 is arranged on the inner wall of the ring plate assembly 1, the expansion assembly 3 is arranged outside the hole of the receiving tunnel door, and is used to expand the inner diameter of the sealing assembly 2 outward along the radial direction of the receiving tunnel door so that the shield shell of the shield machine 7 can smoothly enter the inner hole of the sealing assembly 2, and the outlet assembly 4 is slidably arranged on the top of the expansion assembly 3, and is used to receive soil debris when the shield machine 7 drills out of the receiving tunnel door to avoid damaging the sealing assembly 2.

[0022] In this embodiment, reference Figure 3 The ring plate assembly 1 includes a pre-embedded steel ring plate 101, and the outer wall of the pre-embedded steel ring plate 101 is matched with the inner wall of the receiving hole door.

[0023] Further, in this embodiment, reference is again made to Figure 3 The ring plate assembly 1 also includes a water stop plate 102 embedded in the concrete of the receiving tunnel. The inner hole of the water stop plate 102 is installed on the outside of the embedded steel ring plate 101. A plurality of anchor bars 103 are arranged at intervals around the outside of the embedded steel ring plate 101.

[0024] In this embodiment, continue to refer to Figure 3 , and refer to 4-6 together, the sealing assembly 2 includes a plurality of baffles 201 sequentially installed around the inner wall of the embedded steel ring plate 101 along the axial direction thereof, and a first airbag 203 and a second airbag 206, wherein the baffle 201 is located on the side of the embedded steel ring plate 101 away from the receiving hole opening, and both ends of the inner side edge of the baffle 201 are rotatably connected with a folding plate 202, and the first airbag 203 and the second airbag 206 are integrally formed, wherein the cross section of the first airbag 203 is a canine tooth shape and the canine tooth shape is The sharp end faces the shield excavation direction of the shield machine 7, the cross-section of the second airbag 206 is heel-shaped, and an inner concave annular groove is formed between the bottom of the second airbag 206 and the bottom of the first airbag 203, the upper and lower sides of the first airbag 203 are connected to the first inflation valve 204, the side sides of the first airbag 203 are connected to the first exhaust valve 205, the upper and lower sides of the second airbag 206 are connected to the second inflation valve 207, and the side sides of the second airbag 206 are connected to the second exhaust valve 208.

[0025] In this embodiment, specific reference is made to Figure 6When the shield machine 7 finally exits the receiving tunnel, the face is located at the section of the annular gap between the shield machine 7 and the embedded steel ring plate 101. Under the internal soil pressure, it is easy for groundwater to gush out along the above section to the outside, usually in the receiving well environment. If this is not blocked, it will cause serious construction accidents. In this embodiment, after the first airbag 203 and the second airbag 206 are filled with gas, they will be tightly attached to the outside of the shield shell of the shield machine 7. Since the cross-section of the first airbag 203 is canine-shaped and the sharp part of the canine teeth faces the shield excavation direction of the shield machine 7, once a large amount of groundwater and entrained mud gush out from the above section, it will first be blocked by the baffle 201 and the folding plate 202. At this time, combined with the special shape of the first airbag 203, the groundwater and mud pressure is converted into the pressure applied by the first airbag 203 to the outside of the shield shell of the shield machine 7. The pressure here increases, which improves the seal between the shield machine 7 and the embedded steel ring plate 101 when it is received, and alleviates the leakage. At the same time, the second airbag 206 uses its special shape and relies on the friction between it and the shield machine 7 to ensure that the first airbag 203 maintains contact with the shield machine 7 when it is subjected to groundwater and mud pressure, and will not be flushed open.

[0026] In this embodiment, reference Figure 7-9 The expansion component 3 includes a steel rail 309 laid outside the receiving tunnel entrance along the axial direction of the embedded steel ring plate 101, a reaction frame 311 is installed on the top of one end of the steel rail 309, one side of the reaction frame 311 is connected to the second hydraulic cylinder 310, the other end of the second hydraulic cylinder 310 is connected to the base 305, and brackets 304 are installed on both sides of one end of the base 305, and guide rail modules 302 are installed on the upper and lower sides of the bracket 304, one end of the guide rail module 302 mover is installed with an expansion piece 301, and the other end of the guide rail module 302 mover is connected to the first hydraulic cylinder 303, and the cylinder bodies of the first hydraulic cylinder 303 are respectively installed on the outer ends of the stators of the guide rail module 302.

[0027] The expansion pieces 301 can be folded together to form a complete cylindrical structure, and the axial center line of the cylindrical structure coincides with the axial center lines of the first airbag 203 and the second airbag 206 .

[0028] Furthermore, in order to facilitate movement, the expansion assembly 3 also includes support legs 306 installed on both sides of the bottom of the base 305, and a plurality of load-bearing wheels 307 that cooperate with the top of the rail 309 are arranged at intervals at the bottom of the support legs 306.

[0029] Furthermore, in order to balance the weight of the head expansion plate 301, the expansion assembly 3 also includes a kick wheel 308 installed at the bottom of one end of the support leg 306 close to the reaction frame 311. The cross-section of the rail 309 is I-shaped, and the inside of the kick wheel 308 is matched with the outside of the flange part of the rail 309.

[0030] In this embodiment, again refer to Figure 7-9 The export component 4 includes a pair of slide bars 401 installed in parallel on the top of the base 305, and a third hydraulic cylinder 404 installed on both sides of the top of the base 305. A hopper 402 is provided above the slide bar 401, and slide grooves 403 are installed on both sides of the bottom of the hopper 402. The slide grooves 403 are respectively matched with the top of the slide bar 401, and the telescopic ends of the third hydraulic cylinder 404 are respectively connected to the outside of the slide grooves 403.

[0031] In the prior art, since the outer side of the soil in the receiving tunnel and the concrete sealing the receiving tunnel opening is an open space such as the receiving well, the supporting force from the outside to the inside is lost. When the shield machine 7 breaks out of the ground, the soil in the receiving tunnel and the concrete sealing the receiving tunnel opening will collapse outward under the action of the shield machine 7 during shield tunneling, and directly fall on the annular curtain rubber plate, causing damage to the annular curtain rubber plate, affecting the sealing effect and the reliability of subsequent secondary utilization. In this embodiment, the hopper 402 that can enter and exit the receiving tunnel opening is used to receive the soil in the receiving tunnel and the concrete sealing the receiving tunnel opening, thereby avoiding damage to the sealing structure below and ensuring the subsequent sealing effect.

[0032] Further, refer again Figure 1 The shield receiving sealing device also includes an air pump station 5, and the air outlet of the air pump station 5 is connected to the air inlet of the first inflation valve 204 and the second inflation valve 207 through pipelines.

[0033] Furthermore, it also includes a hydraulic station 6, the inlet and outlet valves of the hydraulic station 6 are respectively connected to the first hydraulic cylinder 303, the second hydraulic cylinder 310 and the third hydraulic cylinder 404 through oil pipes.

[0034] A method for using a shield receiving sealing device comprises the following steps: Step 1: Install and connect the baffle 201, the folding plate 202, the first air bag 203 and the second air bag 206 with the embedded steel ring plate 101 according to the designed structure. When pouring the receiving tunnel door, embed the embedded steel ring plate 101, the water stop plate 102 and the anchor bar 103 in the poured concrete, and ensure that the first inflation valve 204, the first exhaust valve 205, the second inflation valve 207 and the second exhaust valve 208 are unobstructed after embedding.

[0035] Step 2: Lay the steel rail 309 outside the receiving tunnel along the axial direction of the embedded steel ring plate 101, and arrange the base 305 and its installation and connection structure in sequence, wherein the laying height of the steel rail 309 is calculated in advance so that the axial center line of the cylindrical structure formed by the expansion pieces 301 coincides with the axial center line of the first airbag 203 and the second airbag 206.

[0036] Step three, connect the air outlet of the air pump station 5 to the air inlets of the first inflation valve 204 and the second inflation valve 207 through pipelines, and connect the inlet and outlet valves of the hydraulic station 6 to the first hydraulic cylinder 303, the second hydraulic cylinder 310 and the third hydraulic cylinder 404 through oil pipes.

[0037] Step 4: When the shield machine 7 advances to within five meters of the embedded steel ring plate 101, a certain amount of gas is filled into the first airbag 203 and the second airbag 206 respectively, and then the second hydraulic cylinder 310 extends to push the expansion piece 301 into the embedded steel ring plate 101 until it passes the first airbag 203 and the second airbag 206 and stops. When the shield machine 7 advances to within one and a half meters of the embedded steel ring plate 101, the first hydraulic cylinder 303 contracts synchronously so that each expansion piece 301 synchronously expands the inner diameter of the first airbag 203 and the second airbag 206 outward along the radial direction of the receiving tunnel gate, wherein the radius increment of the first airbag 203 and the second airbag 206 is at least 1 times the thickness of the expansion piece 301. At the same time, the third hydraulic cylinder 404 extends to move the hopper 402 into the receiving tunnel gate.

[0038] Step 5. After the shield machine 7 completely breaks out of the ground in the receiving tunnel, the shield excavation is stopped in time. At this time, the fallen soil debris has fallen into the hopper 402 by itself. The second hydraulic cylinder 310 and the third hydraulic cylinder 404 are contracted synchronously to make the expansion plate 301 and the hopper 402 completely withdrawn from the receiving tunnel. At the same time, the first airbag 203 and the second airbag 206 are filled with gas again until saturated. At this time, the inner walls of the first airbag 203 and the second airbag 206 will be completely in contact with the outside of the shield shell of the shield machine 7, thereby realizing the sealing of the annular gap between the shield machine 7 and the receiving tunnel.

[0039] Step 6: Dismantle the expansion component 3 and the export component 4 equipment, and after laying the equipment components required for receiving the shield machine 7, complete the reception of the shield machine 7.

[0040] In step 4, the inflation amount of the first airbag 203 is 80%-90% of its saturated inflation amount, and the inflation amount of the second airbag 206 is 50%-60% of its saturated inflation amount.

[0041] When the present scheme is working, firstly, each structural component is assembled according to the design, and then when the shield machine 7 is excavated to within five meters of the embedded steel ring plate 101, a certain amount of gas is respectively filled into the first airbag 203 and the second airbag 206, and then the second hydraulic cylinder 310 is extended to push the bracket 304 into the embedded steel ring plate 101 until it passes over the first airbag 203 and the second airbag 206 and stops. When the shield machine 7 is excavated to within one and a half meters of the embedded steel ring plate 101, the first hydraulic cylinder 303 is synchronously contracted so that each expansion piece 301 is synchronously expanded outward along the radial direction of the receiving tunnel door. 3 and the inner diameter of the second airbag 206, wherein the radius increment of the first airbag 203 and the second airbag 206 is at least 1 times the thickness of the expansion piece 301, and at the same time, the third hydraulic cylinder 404 is extended to move the hopper 402 to the receiving tunnel door, and then the shield machine 7 stops the shield excavation in time after completely breaking out of the ground in the receiving tunnel door. At this time, the fallen soil and debris fall into the hopper 402 by themselves, and the second hydraulic cylinder 310 and the third hydraulic cylinder 404 are contracted synchronously to make the expansion piece 301 and the hopper 402 completely withdraw from the receiving tunnel door. At the same time, gas is again filled into the first airbag 203 and the second airbag 206 until When the pressure is saturated, the inner walls of the first airbag 203 and the second airbag 206 will be completely attached to the outside of the shield shell of the shield machine 7. At this time, the face is located at the section of the annular gap between the shield machine 7 and the embedded steel ring plate 101. Once a large amount of groundwater and mud gushed out, it will be first blocked by the baffle 201 and the folding plate 202 to avoid direct impact on the first airbag 203 at the rear. At the same time, the folding plate 202 will be pressed to deflect, and then pressure will be applied to the inner bend of the first airbag 203. At this time, combined with the special shape of the first airbag 203, the groundwater and mud pressure will be converted into the pressure applied by the first airbag 203 to the outside of the shield shell of the shield machine 7. The pressure here increases, which improves the sealing between the shield machine 7 and the embedded steel ring plate 101 when receiving, alleviates the leakage, and at the same time, the second airbag 206 uses its special shape and relies on the friction between it and the shield machine 7 to make the first airbag 203 maintain contact with the shield machine 7 when subjected to groundwater and mud pressure, and will not be flushed open, thereby realizing the sealing of the annular gap between the shield machine 7 and the receiving tunnel door, and through the hopper 402 that enters the receiving door hole, it can receive the soil in the receiving tunnel door that falls and the concrete that seals the receiving door hole, thereby avoiding damaging the sealing structure below and ensuring the subsequent sealing effect.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shield receiving sealing device, comprising a ring plate assembly (1), a sealing assembly (2), an expansion assembly (3) and a guide assembly (4), characterized in that: The ring plate assembly (1) is preset in the receiving tunnel door, the sealing assembly (2) is arranged on the inner wall of the ring plate assembly (1), the expansion assembly (3) is arranged outside the hole of the receiving tunnel door, and is used to expand the inner diameter of the sealing assembly (2) outward along the radial direction of the receiving tunnel door, so that the shield shell of the shield machine (7) can smoothly enter the inner hole of the sealing assembly (2), and the outlet assembly (4) is slidably arranged on the top of the expansion assembly (3), and is used to receive soil debris when the shield machine (7) drills out of the receiving tunnel door, so as to avoid damaging the sealing assembly (2); The ring plate assembly (1) comprises a pre-buried steel ring plate (101), the outer wall of the pre-buried steel ring plate (101) being matched with the inner wall of the receiving hole door; The sealing assembly (2) comprises a plurality of baffles (201) which are sequentially installed around the inner wall of the embedded steel ring plate (101) in the axial direction thereof, as well as a first airbag (203) and a second airbag (206), wherein the baffle (201) is located on a side of the embedded steel ring plate (101) away from the receiving hole opening, and both ends of the inner side edge of the baffle (201) are rotatably connected to a folding plate (202), and the first airbag (203) and the second airbag (206) are integrally formed, wherein the cross section of the first airbag (203) is canine-shaped and the sharp end of the canine teeth faces the shield. In the shield tunneling direction of the machine (7), the cross section of the second airbag (206) is heel-shaped, and an inner concave annular groove is formed between the bottom of the second airbag (206) and the bottom of the first airbag (203), the upper and lower sides of the first airbag (203) are connected to the first inflation valve (204), the side sides of the first airbag (203) are connected to the first exhaust valve (205), the upper and lower sides of the second airbag (206) are connected to the second inflation valve (207), and the side sides of the second airbag (206) are connected to the second exhaust valve (208); The expansion assembly (3) comprises a steel rail (309) laid outside the receiving tunnel opening along the axial direction of the embedded steel ring plate (101); a reaction frame (311) is installed on the top of one end of the steel rail (309); a second hydraulic cylinder (310) is connected to one side of the reaction frame (311); the other end of the second hydraulic cylinder (310) is connected to a base (305); brackets (304) are installed on both sides of one end of the base (305); guide rail modules (302) are installed on the upper and lower sides of the brackets (304); expansion plates (301) are installed on one end of the movers of the guide rail modules (302); the other ends of the movers of the guide rail modules (302) are connected to the first hydraulic cylinder (303); and the cylinder bodies of the first hydraulic cylinders (303) are respectively installed on the outer ends of the stators of the guide rail modules (302); The export assembly (4) comprises a pair of slide bars (401) installed in parallel on the top of the base (305), and a third hydraulic cylinder (404) installed on both sides of the top of the base (305); a hopper (402) is provided above the slide bar (401); slide grooves (403) are installed on both sides of the bottom of the hopper (402); the slide grooves (403) are respectively matched with the top of the slide bar (401); and the telescopic ends of the third hydraulic cylinder (404) are respectively connected to the outside of the slide grooves (403).

2. A shield receiving sealing device according to claim 1, characterized in that: The ring plate assembly (1) further comprises a water stop plate (102) embedded in the concrete of the receiving tunnel, wherein the inner hole of the water stop plate (102) is installed outside the embedded steel ring plate (101).

3. A shield receiving sealing device according to claim 1, characterized in that: A plurality of anchor bars (103) are arranged at intervals around the outer periphery of the embedded steel ring plate (101).

4. A shield receiving sealing device according to claim 1, characterized in that: The expansion sheets (301) can be folded together to form a complete cylindrical structure, and the axial centerline of the cylindrical structure coincides with the axial centerlines of the first airbag (203) and the second airbag (206).

5. A shield receiving sealing device according to claim 1, characterized in that: The expansion assembly (3) further comprises support legs (306) mounted on both sides of the bottom of the base (305), and a plurality of load-bearing wheels (307) are arranged at intervals at the bottom of the support legs (306) and are matched with the top of the steel rail (309).

6. A shield receiving sealing device according to claim 1, characterized in that: The expansion assembly (3) further comprises a buckle wheel (308) mounted at the bottom of one end of the support leg (306) close to the reaction frame (311); the cross section of the steel rail (309) is I-shaped; the inside of the buckle wheel (308) fits into the outside of the upper flange portion of the steel rail (309).

7. A shield receiving sealing device according to claim 1, characterized in that: It also comprises an air pump station (5), the air outlet of the air pump station (5) being connected to the air inlets of the first inflation valve (204) and the second inflation valve (207) respectively through pipelines.

8. A shield receiving sealing device according to claim 1, characterized in that: It also comprises a hydraulic station (6), wherein the inlet and outlet valve ports of the hydraulic station (6) are respectively connected to the first hydraulic cylinder (303), the second hydraulic cylinder (310) and the third hydraulic cylinder (404) through oil pipes.

9. A method for using a shield receiving sealing device, characterized in that: The following steps are involved: Step 1: Install and connect the baffle plate (201), the folding plate (202), the first air bag (203) and the second air bag (206) to the embedded steel ring plate (101) according to the designed structure; when pouring the receiving tunnel door, embed the embedded steel ring plate (101), the water stop plate (102) and the anchor bar (103) in the poured concrete, and ensure that the first inflation valve (204), the first exhaust valve (205), the second inflation valve (207) and the second exhaust valve (208) are unobstructed after being buried; Step 2: laying a steel rail (309) outside the receiving hole along the axial direction of the embedded steel ring plate (101), and sequentially arranging the base (305) and the structure for mounting and connecting the steel rail (309), wherein the laying height of the steel rail (309) is calculated in advance so that the axial center line of the cylindrical structure formed by the expansion pieces (301) coincides with the axial center line of the first airbag (203) and the second airbag (206); Step 3: Connect the air outlet of the air pump station (5) to the air inlets of the first inflation valve (204) and the second inflation valve (207) through pipelines, and connect the inlet and outlet valves of the hydraulic station (6) to the first hydraulic cylinder (303), the second hydraulic cylinder (310) and the third hydraulic cylinder (404) through oil pipes; Step 4: When the shield machine (7) is excavated to within five meters of the embedded steel ring plate (101), a certain amount of gas is respectively filled into the first airbag (203) and the second airbag (206), and then the second hydraulic cylinder (310) is extended to push the expansion piece (301) into the embedded steel ring plate (101) until it passes over the first airbag (203) and the second airbag (206) and stops. When the shield machine (7) is excavated to within five meters of the embedded steel ring plate (101), a certain amount of gas is respectively filled into the first airbag (203) and the second airbag (206). 01) within 1.5 meters, the first hydraulic cylinder (303) contracts synchronously so that each expansion plate (301) synchronously expands the inner diameter of the first airbag (203) and the second airbag (206) outward along the radial direction of the receiving hole, wherein the radius increment of the first airbag (203) and the second airbag (206) is at least 1 times the thickness of the expansion plate (301), and at the same time, the third hydraulic cylinder (404) extends so that the hopper (402) moves into the receiving hole; Step 5: After the shield machine (7) completely breaks out of the earth in the receiving tunnel, the shield excavation is stopped in time. At this time, the fallen soil debris has fallen into the hopper (402) by itself, and the second hydraulic cylinder (310) and the third hydraulic cylinder (404) are contracted synchronously so that the expansion plate (301) and the hopper (402) are completely withdrawn from the receiving tunnel. At the same time, the first airbag (203) and the second airbag (206) are filled with gas again until saturated. At this time, the inner walls of the first airbag (203) and the second airbag (206) will be completely attached to the outside of the shield shell of the shield machine (7), so as to achieve the sealing of the annular gap between the shield machine (7) and the receiving tunnel; Step 6: Dismantle the expansion component (3) and the export component (4) equipment, and after laying the equipment components required for receiving the shield machine (7), complete the reception of the shield machine (7).

10. A method for using a shield receiving sealing device according to claim 9, characterized in that: In step 4, the inflation volume of the first airbag (203) is 80%-90% of its saturated inflation volume, and the inflation volume of the second airbag (206) is 50%-60% of its saturated inflation volume.

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