A combined sleeve assembly, a shield receiving system and a shield receiving method

Abstract

The present invention belongs to the technical field of shield receiving, and discloses a combined sleeve assembly, a shield receiving system and a shield receiving method. A combined sleeve assembly among them is applied to shield receiving and includes: a transition ring for connecting with a pre-buried steel ring and provided with a first filling port for filling a curable sealing medium into the inner side of the transition ring to form a solid support body; a first sleeve coaxially connected with the transition ring, and a plurality of groups of elastic sealing components are arranged along the axial direction on the inner side wall of the first sleeve; a second sleeve slidably fitted in the first sleeve and having a pushed surface facing the shield, and a sliding seal is formed between the second sleeve and the first sleeve through the elastic sealing components; and at least two linear driving components are circumferentially connected between the axial ends of the first sleeve and the second sleeve, and the second sleeve is detachably connected with the linear driving components. The present invention can perform shield receiving with a shorter sleeve length.

Description

Technical Field

[0001] The present invention belongs to the technical field of shield machine reception, and particularly relates to a combined sleeve assembly, a shield machine reception system and a shield machine reception method. Background Art

[0002] With the large-scale promotion of urban rail transit in China, the shield technology has become more and more mature and reliable. In the shield industry, the construction concept of "shield if possible" has been formed. The steel sleeve reception technology supporting it has also developed differently and is being gradually promoted. Using a steel sleeve to assist the shield in starting and receiving is more reliable, convenient and economical than the traditional method of strengthening the formation and then starting and receiving the shield. Therefore, it will be more and more widely used. However, under the existing technical conditions, when receiving the shield, the length of the steel sleeve required is longer than the length of the shield to safely complete the reception work. Therefore, the steel sleeve required for shield reception is relatively long, and it also needs to be completely filled inside the steel sleeve, resulting in the following consequences:

[0003] 1. The required steel sleeve is long, heavy and costly;

[0004] 2. The installation and removal processes of the steel sleeve are cumbersome, with high construction difficulty and long cycle;

[0005] 3. The cost is high during transportation between cities;

[0006] 4. It occupies a large area during storage and has high storage costs;

[0007] 5. When used again, the cost of grinding and painting is high;

[0008] 6. A large amount of filling material is required for filling inside the steel sleeve, and the material cost and labor cost are high. Summary of the Invention

[0009] In view of this, the purpose of the present invention is to provide a combined sleeve assembly, a shield machine reception system and a shield machine reception method to solve the problem that a longer steel sleeve is required for the existing shield machine reception.

[0010] To achieve the above purpose, the present invention adopts the following technical solutions:

[0011] In the first aspect, a combined sleeve assembly for shield machine reception is provided, including:

[0012] A transition ring for connecting with a pre-embedded steel ring, and provided with a first filling port for filling a curable sealing medium into the inner side of the transition ring to form a solid support;

[0013] A first sleeve coaxially connected with the transition ring, and provided with multiple groups of elastic sealing components along the axial direction on the inner side wall of the first sleeve;

[0014] A second sleeve, which is slidably fitted inside the first sleeve and has a pressed surface facing the shield, and forms a sliding seal between the second sleeve and the first sleeve through the elastic sealing member; and

[0015] A linear driving member, with at least two groups provided and circumferentially connected between the axial ends of the first sleeve and the second sleeve, and the second sleeve is detachably connected to the linear driving member.

[0016] In a possible implementation, the elastic sealing member is a spring steel plate brush, and each group of spring steel plate brushes is circumferentially distributed;

[0017] A sealing section is formed by two adjacent groups of the spring steel plate brushes, and the first sleeve is respectively provided with a tail seal grease injection hole and a grease pressure detection hole corresponding to each sealing section.

[0018] In a possible implementation, the linear driving member includes a hydraulic cylinder, a first connecting member and a second connecting member. One end of the hydraulic cylinder is connected to the outer wall of the first sleeve through the first connecting member, and the other end of the hydraulic cylinder is detachably connected to the outer wall of the second sleeve through the second connecting member.

[0019] In a possible implementation, the second sleeve is longer than the first sleeve, so that the second sleeve has an embedded section for extending into the first sleeve and an installation section for installing the second connecting member.

[0020] In a possible implementation, the transition ring has a flange connection portion for connecting with the embedded steel ring. The end face of the flange connection portion close to the embedded steel ring is provided with a circumferentially distributed annular installation groove, and a matching sealing airbag is arranged in the annular installation groove.

[0021] In a possible implementation, a spring steel plate assembly is provided along the circumference at the front end of the inner side wall of the transition ring. The spring steel plate assembly has an elastic sealing portion extending towards the direction where the embedded steel ring is located, and the elastic sealing portion is used for pressing against the inner wall of the embedded steel ring.

[0022] In a possible implementation, the solidified sealing medium is cement mortar or water;

[0023] When the solidified sealing medium is water, a refrigeration pipeline is arranged inside one end of the first sleeve where the pressed surface is provided. The refrigeration pipeline has a water inlet and a water outlet. The water inlet is used for connecting with the water outlet pipeline of the refrigeration unit, and the water outlet is used for connecting with the water return pipeline of the refrigeration unit.

[0024] In a possible implementation, the second sleeve includes a plurality of fan-shaped components. Both sides of each fan-shaped component are provided with connecting plates, and the connecting plates are provided with double-row bolts and are connected to the connecting plates of adjacent fan-shaped components through the double-row bolts.

[0025] Second aspect, there is also provided a shield receiving system, including:

[0026] A combined sleeve assembly according to any one of the above technical solutions;

[0027] A reaction frame for axially supporting the second sleeve during shield receiving;

[0028] A first support frame for supporting the transition ring;

[0029] A second support frame for supporting the first sleeve; and

[0030] A shield receiving base for supporting the shield when it moves out of the first sleeve.

[0031] Third aspect, there is also provided a shield receiving method based on a shield receiving system according to any one of the above technical solutions, characterized by including:

[0032] Connect the transition ring with the embedded steel ring and the first sleeve with the transition ring successively, and support the transition ring and the first sleeve respectively through the first support frame and the second support frame;

[0033] Embed the second sleeve axially into the first sleeve, and then install the reaction frame;

[0034] Inject tail seal grease through each tail grease injection hole of the second sleeve, and detect whether the grease pressure meets the usage requirements through the grease pressure detection hole;

[0035] Inject water through the first filling hole to conduct a pressure test on the assembled shield receiving system, and drain the injected water after the pressure meets the requirements;

[0036] Fill the inner side of the transition ring with a curable sealing medium through the first filling hole, and wait for the curable sealing medium to harden to form a solid support body, then the shield starts to tunnel;

[0037] After the shield breaks through the stratum structure outside the station, the cutter head gradually tunnels into the solid support body, and stops tunneling when the cutter head reaches the predetermined position;

[0038] Remove the reaction frame and install the shield receiving base;

[0039] The shield advances, and through the hydraulic cylinders connected to the first sleeve and the second sleeve, the second sleeve advances synchronously with the cutter head and the solid support body towards the station direction;

[0040] When at least three spring steel plate brushes in the first sleeve are pressed against the outer surface of the shield 3, inject tail seal grease through the grease injection hole, and detect the grease pressure through the grease pressure detection hole. After the grease pressure meets the requirements, the shield continues to advance outwards;

[0041] After the second sleeve is completely pushed away from the first sleeve, the spring steel plate brushes of the first sleeve are evenly pressed against the outer wall of the shield to form a seal;

[0042] Remove the second sleeve;

[0043] Before the tail of the shield has not disengaged from the last spring steel plate brush of the first sleeve, grout the gap between the outside of the tunnel segment and the embedded steel ring through the grouting hole on the tunnel segment, and after hardening, form a mortar solid seal;

[0044] Remove the transition ring, the first sleeve and the second sleeve, and then remove the shield. At this time, the shield receiving work is completed.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The combined sleeve assembly of the present invention, through the first sleeve, the second sleeve and the linear drive component, can form a combined telescopic sleeve structure. The solid support formed by the pressing surface of the second sleeve can provide sufficient support for these structures during the shield cutting the structures outside the station, and is also convenient for cutting forward and achieving a certain degree of sealing by blocking. In this way, it is beneficial to carry out shield receiving with a shorter sleeve length, and the structure is more stable. And because there is no rigid connection between the inner and outer layers of the sleeves, the vibration received by the first sleeve is relatively small, and the risk of the first steel sleeve being cracked is also greatly reduced. At the same time, the second sleeve can also be removed to facilitate the receiving of the shield.

[0047] Moreover, the flange connection part of the transition ring is provided with a sealing airbag, which can also play a circumferential seal while being connected by flange bolts, and grease or polyurethane can be injected through the grease injection hole provided on the flange connection part, so that the sealing effect at the end is better. And the transition ring is provided with spring steel plates and is fixed to the inner wall of the transition ring by bolts. After the receiving is completed, if the transition ring is discarded, the spring steel plates in the transition ring can be conveniently taken out and reused, which can reduce costs.

[0048] At the same time, the curable sealing medium filled through the first filling port can be mortar or water. The mortar can form a solid support after solidification, which is more convenient, but it can also be water. By setting a freezing pipeline on the end face of the second sleeve, the filled water can be frozen and solidified to form a solid support, which is also more convenient and practical.

[0049] In addition, the second sleeve is composed of multiple fan-shaped components, and two adjacent fan-shaped components are connected by a double-row bolt connection structure. Therefore, while being convenient for disassembly, transportation, it can also make the structure more firm after connection.

[0050] The shield receiving system of the present invention adopts a combined sleeve assembly and cooperates with a reaction frame to provide stable support for the second sleeve, enabling the shield reception to be more stable and reliable. Moreover, through the first support frame, the second support frame, and the shield receiving base, it is convenient to support the transition ring and the first sleeve, as well as to support the shield after it enters the station, which is more convenient and reliable.

[0051] The receiving method of the present invention can achieve shield reception with a shorter sleeve length through the shield receiving system, without the need to fill a large amount of filling materials, and has a multiple sealing effect. It is also more convenient for disassembly, installation, and transportation, greatly improving the safety of shield reception and reducing costs. Brief Description of the Drawings

[0052] Figure 1 It is a schematic structural diagram of a combined sleeve assembly according to an embodiment of the present application;

[0053] Figure 2 It is a schematic rear-view structural diagram of the second sleeve of a combined sleeve assembly according to an embodiment of the present application;

[0054] Figure 3 It is a schematic upper-part structural diagram of the first sleeve of a combined sleeve assembly according to an embodiment of the present application;

[0055] Figure 4 It is a schematic structural diagram of a combined sleeve assembly with an inflatable airbag according to an embodiment of the present application;

[0056] Figure 5 It is a schematic structural diagram of a shield receiving system after installation according to an embodiment of the present application;

[0057] Figure 6 It is a schematic structural diagram of a shield receiving system when preparing for reception according to an embodiment of the present application;

[0058] Figure 7 It is a schematic structural diagram of a shield receiving system after forming a solid support body when starting to receive according to an embodiment of the present application;

[0059] Figure 8 It is a schematic structural diagram of a shield receiving system when the shield tunneling enters the transition ring and reaches a predetermined position according to an embodiment of the present application;

[0060] Figure 9 It is a schematic structural diagram of a shield receiving system after removing the reaction frame according to an embodiment of the present application;

[0061] Figure 10 It is a schematic structural diagram of a shield receiving system when the shield quickly excavates in and out of the first sleeve and the second sleeve reaches the removable position according to an embodiment of the present application;

[0062] Figure 11 Schematic structural diagram of a shield receiving system according to an embodiment of the present application after removing the second sleeve and installing the shield receiving base;

[0063] Figure 12 Schematic structural diagram of a shield receiving system according to an embodiment of the present application after the shield is advanced out of the first sleeve and the tail of the shield leaves and the tunnel segment is filled with mortar;

[0064] In the figure: 1 - transition ring; 11 - first filling port; 12 - flange connection part; 13 - sealing airbag; 14 - spring steel plate assembly; 15 - access door; 16 - end grease injection hole; 2 - first sleeve; 21 - grease pressure detection hole; 22 - tail shield grease injection hole; 23 - spring steel plate brush; 24 - track; 25 - inflatable airbag; 3 - second sleeve; 31 - pressed surface; 32 - sector component; 33 - double-row bolts; 4 - hydraulic cylinder; 5 - sensor; 6 - embedded steel ring; 7 - reaction frame; 8 - first support frame; 9 - second support frame; 10 - shield; 100 - solid support; 110 - shield receiving base; 120 - tunnel segment; 130 - grouting hole; 140 - mortar solid seal. Specific embodiments

[0065] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0066] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0067] Please refer to Figures 1-4 As shown, an embodiment of the present application provides a combined sleeve assembly, which is applied to the reception of the shield 10 and mainly includes a transition ring 1, a first sleeve 2, a second sleeve 3, and a linear driving component.

[0068] The transition ring 1 is used to connect with the embedded steel ring 6 and is provided with a first filling port 11 for filling a curable sealing medium into the inner side of the transition ring 1 to form a solid support 100. The transition ring 1 has two functions. One is to form a filling space convenient for filling the curable sealing medium and hardening, and it can also provide a buffer area, making the reception of the shield 10 of the sleeve more stable. The first filling hole on the transition ring 1 is mainly used for filling the curable sealing medium. The curable sealing medium can be cured from a liquid state to a solid state. The curing method can be curing by its own chemical or physical properties, or curing by methods such as cooling, such as mortar or water, which can be specifically selected according to the actual situation.

[0069] The first sleeve 2 is coaxially connected to the transition ring 1, and multiple groups of elastic sealing components are arranged along the axial direction on the inner side wall of the first sleeve 2. The first sleeve 2 is coaxially connected to the transition ring 1, and the elastic sealing components therein can be attached to the outer wall of the shield 10, the outer wall of the tunnel segment 120, or the outer wall of the second sleeve 3 to form a seal.

[0070] The second sleeve 3 is slidably fitted in the first sleeve 2 and has a pressed surface 31 facing the shield 10, and a sliding seal is formed between the second sleeve 3 and the first sleeve 2 through the elastic sealing components. The second sleeve 3 is slidably installed in the first sleeve 2. Through its pressed surface 31, it can play a role similar to that of a piston. Under the support and control of the linear drive component, it can effectively perform support and synchronous movement, making the reception of the shield 10 more stable.

[0071] There are at least two groups of linear drive components, which are circumferentially connected between the axial ends of the first sleeve 2 and the second sleeve 3. The second sleeve 3 is detachably connected to the linear drive component. The linear drive component is used to move the first sleeve 2 and the second sleeve 3 relative to each other, so as to facilitate the installation of the second sleeve 3 in the first sleeve 2 and enable the second sleeve 3 to move synchronously with the advancement of the shield 10 during reception. And since the second sleeve 3 only has a direct detachable connection relationship with the linear drive component, the second sleeve 3 can be removed by removing the connection between the two, which is convenient for further receiving the shield 10, and the structural design is more reasonable and practical.

[0072] Through the above technical solution, a combined telescopic sleeve structure can be formed by the first sleeve 2, the second sleeve 3 and the linear drive component. The solid support body 100 formed by the pressed surface of the second sleeve 3 can provide sufficient support force for these structures during the shield 10 cutting the structures outside the station, and is also convenient for cutting forward and achieving a certain degree of sealing by blocking. In this way, it is beneficial to receive the shield 10 with a shorter sleeve length, and the structure is more stable. Moreover, since there is no rigid connection between the inner and outer layers of the sleeves, the vibration received by the first sleeve 2 is relatively small, and the risk of the first steel sleeve being cracked is greatly reduced. At the same time, the second sleeve 3 can also be removed to facilitate the reception of the shield 10.

[0073] In an embodiment, the elastic sealing component is a spring steel plate brush 23, and each group of spring steel plate brushes 23 is circumferentially distributed; a sealing section is formed by two adjacent groups of spring steel plate brushes 23, and the first sleeve 2 is respectively provided with a tail seal grease injection hole 22 and a grease pressure detection hole 21 corresponding to one sealing section.

[0074] The spring steel plate brush 23 can be pressed against the outer wall of the second sleeve 3, the shield 10 or the tunnel segment 120 by elastic force. Shield tail seal grease can be filled between every two spring steel plate brushes 23, and then a sliding seal can be formed. The second sleeve 3 can move unidirectionally on these spring steel plate brushes 23, and the sealing effect is better. The grease pressure detection hole 21 is convenient for pressure detection.

[0075] Furthermore, in order to better realize the linear drive of the first sleeve 2 and the second sleeve 3, the linear drive component includes a hydraulic cylinder 4, a first connecting piece and a second connecting piece. One end of the hydraulic cylinder 4 is connected to the outer wall of the first sleeve 2 through the first connecting piece, and the other end of the hydraulic cylinder 4 is detachably connected to the outer wall of the second sleeve 3 through the second connecting piece.

[0076] Specifically, the second sleeve 3 is longer than the first sleeve 2, so that the second sleeve 3 has an embedding section for extending into the first sleeve 2 and an installation section for installing the second connecting piece. In this way, it is convenient to install the second connecting piece through the installation section, and the embedding section can also have a sufficient length to extend into the first sleeve 2. In the specific implementation process, the first connecting piece is a first leg, the second connecting piece is a second leg, and at least four sets of linear drive components are provided.

[0077] In some embodiments, the transition ring 1 has a flange connection portion 12 for connecting with the embedded steel ring 6. The end face of the flange connection portion 12 close to the embedded steel ring 6 is provided with a circumferentially distributed annular installation groove, and a matching sealing airbag 13 is arranged in the annular installation groove.

[0078] In this way, the transition ring 1 can be connected to the embedded steel ring 6 through the flange connection part 12, and the annular installation groove on the flange connection part 12 facilitates the installation of the airbag seal. The airbag seal can further improve the sealing performance between the transition ring 1 and the embedded steel ring 6 and can be used for emergency sealing. Moreover, an end grease injection hole 16 for facilitating grease injection can be provided on the flange connection part 12. When necessary, polyurethane can also be injected to form a multiple seal and improve the sealing effect.

[0079] Furthermore, a spring steel plate assembly 14 is circumferentially provided along the front end of the inner side wall of the transition ring 1. The spring steel plate assembly 14 has an elastic sealing part extending towards the direction where the embedded steel ring 6 is located, and the elastic sealing part is used for pressing against the inner wall of the embedded steel ring 6.

[0080] In this way, the spring steel plate assembly 14 is circumferentially arranged and includes two or three layers of spring steel plates stacked staggeredly, which facilitates installation and disassembly. One end of the spring steel plate assembly 14 is fixed on the inner wall of the transition ring 1, and the other end, namely the elastic sealing part, presses against the inner wall of the embedded steel ring 6. After these spring steel plates form a complete circular seal, they have a certain sealing ability by themselves.

[0081] In the embodiment of the present application, the curable sealing medium is cement mortar or water; when the curable sealing medium is water, a refrigeration pipeline is provided inside the first sleeve 2 at the end where the pushed surface 31 is provided. The refrigeration pipeline has a water inlet and a water outlet. The water inlet is used for connecting to the water outlet pipeline of the refrigeration unit, and the water outlet is used for connecting to the water return pipeline of the refrigeration unit.

[0082] The curable sealing medium filled through the first filling port 11 can be mortar or water. The mortar can form a solid support 100 after solidification, which is more convenient. However, it can also be water. By arranging a refrigeration pipeline on the end face of the second sleeve 3, the filled water can be frozen and solidified to also form a solid support 100, which is also relatively convenient and practical. Regarding the layout of the refrigeration pipeline, the refrigeration pipeline can be coiled on the inner end face side of the second sleeve 3 close to the pushed surface, which can increase the contact area with the end where the pushed surface is located, thereby improving the refrigeration efficiency. Moreover, the water outlet pipeline and the water return pipeline can pass through the installation section of the second sleeve to realize pipeline layout.

[0083] In the specific implementation process, the second sleeve 3 includes a plurality of fan-shaped components 32. Both sides of each fan-shaped component 32 are provided with connecting plates. The connecting plates are provided with double-row bolts 33 and are connected to the connecting plates of the adjacent fan-shaped components 32 through the double-row bolts 33. In this way, the second sleeve 3 composed of a plurality of fan-shaped components 32 is convenient for disassembly and assembly and transportation. Moreover, the connection structure of the double-row bolts 33 can make the structure of the formed second sleeve 3 more firm. At the same time, a gasket can be arranged between the connecting plates, so that the sealing performance is better after connection.

[0084] In addition, the first sleeve 2 and the transition ring 1 can also adopt a structure that facilitates disassembly and assembly, which is more convenient. Moreover, a maintenance passage opening can be provided in the transition ring 1, and the maintenance passage opening is provided with a passage door 15. At the same time, six groups of spring steel plate brushes 23 can be arranged on the inner side of the first sleeve 2, and a track 24 is arranged between every three groups of spring steel plate brushes 23, which is more conducive to the movement of the shield 10.

[0085] During the actual application process, in combination with Figure 4 As shown, since the diameter of the shield 10 is smaller than the outer diameter of the second sleeve 3, during the process of the spring steel plate brush 23 pressing against the outer wall of the second sleeve 3 to pressing against the outer wall of the shield 10, its length in the radial direction will elongate, and after elongation, its pressing force will be reduced to a certain extent. In this application, an inflatable airbag 25 can be arranged between two adjacent spring steel plate brushes 23 through a mounting plate. The inflatable airbag 25 is connected with an air supply pipeline, and the air supply pipeline can adopt a setting method of passing through the wall of the second sleeve 3. In this way, the inflatable airbag can be used to press the spring steel plate brush 23 through the air supply pipeline, increasing the pressure of the spring steel plate brush 23 pressing against the second sleeve and improving the sealing ability of the steel sleeve system. When not inflated, the inflatable airbag is in a contracted state and does not affect the operation of the spring steel plate brush 23; the installation structure of the inflatable airbag 25 can adopt an avoidance structural design, such as setting an avoidance hole, etc., so as not to interfere with the grease injection hole and the grease pressure detection hole.

[0086] There are two usage scenarios for the inflatable airbag. One is to turn it on when the shield 10 cuts the structure outside the station, and the other is to turn it on when the shield is received, after the outer shell of the shield 10 reaches these airbag sealing areas. The size of the inflatable airbag 25 can be adjusted. When the inflatable airbag is inflated, it can also achieve the purpose of closely adhering to the inner wall of the first sleeve and the outer shell of the shield at the same time, directly playing a sealing role.

[0087] To improve the sealing ability of the spring steel plate brush

[0088] Please refer to Figure 5 , the embodiment of this application also provides a shield receiving system, including: a combined sleeve assembly as described in any one of the above technical solutions; a reaction frame 7 for axially supporting the second sleeve 3 when the shield 10 is received; a first support frame 8 for supporting the transition ring 1; a second support frame 9 for supporting the first sleeve 2; and a shield receiving base 110 for supporting the shield 10 when it moves out of the first sleeve 2.

[0089] It adopts a combined sleeve assembly and cooperates with a reaction frame 7 to provide stable support for the second sleeve, enabling the shield 10 to be received more stably and reliably. Moreover, through the first support frame 8, the second support frame 9 and the shield receiving base 110, it is convenient to support the transition ring 1 and the first sleeve 2, as well as the support after the shield 10 enters the station, which is more convenient and reliable.

[0090] The working principle of a shield receiving system according to an embodiment of the present application:

[0091] Before the shield 10 is received, the gap between the front of the second sleeve 3 and the station structure is pre-filled with mortar or water. There are support structures such as a reaction frame 7 at the rear end of the second sleeve 3 to support the second sleeve 3. Wait for the mortar to harden or the water to freeze and solidify to form a solid support body 100. These solid support bodies 100 with a certain strength provide sufficient support force for these structures during the period when the shield 10 cuts the structure outside the station, ensuring that the shield 10 can cut these structures and enter the soil bin of the shield 10, and finally be discharged through the screw conveyor of the shield 10; after the cutter head of the shield 10 breaks the structure outside the station and continues tunneling construction, it will cut into the solid support body 100. Once the cutter head of the shield 10 completely cuts into the solid support body 100, it means that the shield 10 has completely completed the construction work of the tunnel section. At this time, remove the support structure at the rear end of the second sleeve 3, and continue to push the shield 10, the remaining solid support body 100 and the second sleeve 3 forward. At this time, the spring steel plate brush 23 on the first sleeve 2 will gradually transition from being pressed against the surface of the second sleeve 3 to the surface of the shield 10 shell. As the shield 10 continues to advance, more and more spring steel plate brushes 23 are pressed against the shield 10 shell. When a sufficient number of spring steel plate brushes 23 are pressed against the shield 10 shell, the structure formed by the first sleeve 2, the spring steel plate brush 23 and the shield 10 shell will block the passage of muddy water outside the station from entering the station. At this time, remove the second sleeve 3 in front of the cutter head and continue to push the shield 10 forward until the tail of the shield 10 leaves the area of the embedded steel ring 6. At this time, inject a sufficient amount of cement mortar into the gap between the tunnel segment 120 and the embedded steel ring 6 from the grouting hole 130 on the tunnel segment 120. Wait for these cement mortars to harden, and these hardened cement mortar bodies will block the passage of muddy water outside the station from entering the station through the gap between the tunnel segment 120 and the embedded steel ring 6; at this point, the steel sleeve used for receiving can be removed, and the steel sleeve receiving work is completed.

[0092] Please refer to Figures 5-12 , an embodiment of the present application further provides a method for receiving a shield 10. Based on the above shield 10 receiving system, it includes the following steps:

[0093] Step S1: Connect the transition ring 1 with the embedded steel ring 6 and the first sleeve 2 with the transition ring 1 in sequence, and support the transition ring 1 and the first sleeve 2 respectively through the first support frame 8 and the second support frame 9.

[0094] In this step, both the transition ring 1 and the first sleeve 2 are composed of upper and lower parts and are supported by the first support frame 8 and the second support frame 9 during installation; the sealing airbag 13 and the elastic steel plate brush can be installed in this step.

[0095] Step S2: Insert the second sleeve 3 axially along the direction of the spring steel plate brush 23 into the first sleeve 2, and then install the reaction frame 7.

[0096] In this step, the second sleeve 3 can be pre-assembled. After being assembled, it is installed in the first sleeve 2, and then the reaction frame 7 is installed.

[0097] Step S3: Inject shield tail grease through each tail grease injection hole of the second sleeve 3, and detect whether the grease pressure meets the usage requirements from the grease pressure detection hole 21.

[0098] Step S4: Inject water through the first filling hole to conduct a pressure test on the completed assembled shield 10 receiving system. After the pressure meets the requirements, drain the injected water.

[0099] Step S5: Fill the inner side of the transition ring 1 with a curable sealing medium through the first filling hole. After the curable sealing medium hardens, a solid support body 100 is formed, and the shield 10 starts to tunnel.

[0100] In this step, the curable sealing medium can be mortar or water. Mortar can form a solid support body 100 after solidifying and reaching the required strength, which is more convenient. However, it can also be water. By setting a freezing pipeline on the end face of the second sleeve 3, the filled water can be frozen and solidified to also form a solid support body 100, which is also relatively convenient and practical.

[0101] Step S6: After the shield 10 breaks through the stratum structure outside the station, the cutter head gradually tunnels into the solid support body 100. When the cutter head reaches the predetermined position, stop tunneling.

[0102] In this step, a sensor 5 is provided on the pressed surface 31 of the second sleeve 3. The sensor 5 is used to detect whether the shield 10 reaches the predetermined position for switching to the propulsion mode. When the sensor 5 is detected to be touched or damaged, a trigger signal can be sent, and the relevant controller can receive this trigger signal. In this way, it can be known that the cutter head of the shield 10 has reached the predetermined position, and the cutting construction is stopped.

[0103] Step S7: Remove the reaction frame 7 and install the shield receiving base 110.

[0104] Step S8: The shield 10 advances, and through the hydraulic cylinder 4 connected to the first sleeve 2 and the second sleeve 3, the second sleeve 3 is advanced synchronously with the cutter head and the solid support body 100 towards the station direction.

[0105] Step S9: When at least three spring steel brushes 23 in the first sleeve 2 are pressed against the outer surface of the shield 103, shield tail grease is injected through the grease injection hole, and the grease pressure is detected through the grease pressure detection hole 21. After the grease pressure meets the requirements, the shield 10 continues to advance outward.

[0106] Step S10: After the second sleeve 3 is completely pushed away from the first sleeve 2, the spring steel brushes 23 of the first sleeve 2 are evenly pressed against the outer wall of the shield 10 to form a seal.

[0107] In this step, the formed seal blocks the passage for the muddy water outside the station to enter the station.

[0108] Step S11: Remove the second sleeve 3.

[0109] Step S12: Before the shield tail of the shield 10 disengages from the last spring steel brush 23 of the first sleeve 2, grout is injected into the gap between the outside of the tunnel segment 120 and the embedded steel ring 6 through the grouting hole 130 on the tunnel segment 120, and after hardening, a mortar solid seal 140 is formed.

[0110] In this step, the mortar solid seal 140 can block the passage for the muddy water outside the station to enter the station.

[0111] Step S13: Remove the transition ring 1, the first sleeve 2, and the second sleeve 3, and then remove the shield 10. At this time, the shield receiving operation ends.

[0112] In the specific implementation process of this receiving method, supports in the tunnel axis direction can also be added to the outer periphery of the first sleeve, which is not shown in the figure; the connection between the spring steel brush and the first sleeve can be in a welding manner or in a bolt connection manner; the spring steel brush can also be a spring steel wire brush. The spring steel brush 23 is only illustrated by taking 6 as an example in this application. In actual use, the number of spring steel brushes 23 required can be specifically determined according to the size of the shield diameter and the selected level of the earth pressure in the receiving area; the transition ring 1 and the embedded steel ring 6 can also be directly welded; as the material of the solid support 100, bentonite slurry, clay, sand, water, polymer, or chemical slurry such as modified sodium silicate or other filling materials can also be used.

[0113] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A combined sleeve assembly is applied to shield reception, and is characterized in that: including; a transition ring, which is used to connect with the embedded steel ring and is provided with a first filling port for filling a curable sealing medium into the inner side of the transition ring to form a solid support body. During the cutting of the structure outside the station, the solid support body provides sufficient supporting force for the structure and is also convenient for realizing sealing during the cutting progress, so as to be able to carry out shield receiving with a shorter sleeve length; a first sleeve, which is coaxially connected with the transition ring. A plurality of groups of elastic sealing components are arranged axially along the inner side wall of the first sleeve, and the elastic sealing components can be attached to the outer wall of the shield to form a seal; the elastic sealing components are spring steel plate brushes, and each group of spring steel plate brushes is circumferentially distributed; a sealing section is formed between two adjacent groups of the spring steel plate brushes, and the first sleeve is respectively provided with a tail seal grease injection hole and a grease pressure detection hole corresponding to each sealing section; a track is arranged between the spring steel plate brushes; a second sleeve, which is slidably fitted in the first sleeve and has a pressed surface facing the shield on the side close to the transition ring, and a sliding seal is formed between the second sleeve and the first sleeve through the elastic sealing components; and a linear driving component, with at least two groups, which is circumferentially connected between the axial ends of the first sleeve and the second sleeve, and the second sleeve is detachably connected to the linear driving component.

2. The combined sleeve assembly according to claim 1, wherein: The linear driving component includes a hydraulic cylinder, a first connecting piece and a second connecting piece. One end of the hydraulic cylinder is connected to the outer wall of the first sleeve through the first connecting piece, and the other end of the hydraulic cylinder is detachably connected to the outer wall of the second sleeve through the second connecting piece.

3. The combined sleeve assembly according to claim 2, wherein: The second sleeve is longer than the first sleeve, so that the second sleeve has an embedding section for extending into the first sleeve and an installation section for installing the second connecting piece.

4. A combined sleeve assembly according to claim 1, characterized in that: The transition ring has a flange connecting portion for connecting with the embedded steel ring. The end face of the flange connecting portion close to the embedded steel ring is provided with a circumferentially distributed annular installation groove, and a matching sealing airbag is arranged in the annular installation groove.

5. A combined sleeve assembly according to claim 1, characterized in that: The front end of the inner side wall of the transition ring is provided with a spring steel plate assembly circumferentially. The spring steel plate assembly has an elastic sealing portion extending towards the direction where the embedded steel ring is located, and the elastic sealing portion is used for pressing against the inner wall of the embedded steel ring.

6. A combined sleeve assembly according to any one of claims 1-5, characterized in that: The curable sealing medium is cement mortar or water; When the curable sealing medium is water, a freezing pipeline is arranged in the first sleeve at the end with the pressed surface. The freezing pipeline has a water inlet and a water outlet. The water inlet is used for connecting with the outlet pipeline of the freezing unit, and the water outlet is used for connecting with the return pipeline of the freezing unit.

7. A combined sleeve assembly according to any one of claims 1-5, characterized in that: The second sleeve includes a plurality of fan-shaped components. Both sides of each fan-shaped component are provided with connecting plates. The connecting plates are provided with double-row bolts and are connected to the connecting plates of adjacent fan-shaped components through the double-row bolts.

8. A shield receiving system, characterized in that: including: a combined sleeve assembly according to any one of claims 1-7; a reaction frame, which is used to axially support the second sleeve during shield receiving; a first support frame, which is used to support the transition ring; a second support frame, which is used to support the first sleeve; and a shield receiving base, which is used to support when the shield moves out of the first sleeve.

9. A shield tunneling receiving method, based on the shield tunneling receiving system according to claim 8, characterized in that: including: Connect the transition ring with the embedded steel ring and the first sleeve with the transition ring successively, and support the transition ring and the first sleeve by the first support frame and the second support frame respectively; Embed the second sleeve axially into the first sleeve, and then install the reaction frame; Inject tail grease into each tail grease injection hole of the second sleeve, and detect whether the grease pressure meets the usage requirements from the grease pressure detection hole; Inject water through the first filling hole to conduct a pressure test on the assembled shield receiving system, and drain the injected water after the pressure meets the requirements; Fill the inner side of the transition ring with a curable sealing medium through the first filling hole. After the curable sealing medium hardens, a solid support body is formed, and the shield starts to tunnel; After the shield breaks through the stratum structure outside the station, the cutter head gradually tunnels into the solid support body. When the cutter head reaches the predetermined position, stop tunneling; Remove the reaction frame and install the shield receiving base; The shield advances, and through the hydraulic cylinders connected to the first sleeve and the second sleeve, the second sleeve advances synchronously with the cutter head and the solid support body towards the station direction; When at least three spring steel plate brushes in the first sleeve are pressed against the outer surface of the shield, inject tail grease through the grease injection hole, and detect the grease pressure through the grease pressure detection hole. After the grease pressure meets the requirements, the shield continues to advance outwards; After the second sleeve is completely pushed away from the first sleeve, all the spring steel plate brushes of the first sleeve are pressed against the outer wall of the shield to form a seal; Remove the second sleeve; Before the tail of the shield has not separated from the last spring steel plate brush of the first sleeve, grout the gap between the outside of the tunnel segment and the embedded steel ring through the grouting hole on the tunnel segment. After hardening, a mortar solid seal is formed; Remove the transition ring, the first sleeve and the second sleeve, and then remove the shield. At this time, the shield receiving work is completed.

Images