Shield machine and shield tail sealing brush replacement method

Abstract

The present application relates to the technical field of shield equipment, and more particularly to a shield machine and a shield tail sealing brush replacement method, the shield machine comprising a shield main machine, a first trolley, a shield tail device, a sliding device, a driving device and an extension device; the shield tail device comprises a first tail shield and a second tail shield, the first end of the first tail shield is connected with the shield main machine, the second end is hinged with the second tail shield, and the first tail shield and the second tail shield can both form a sealed grouting space with a segment; the sliding device is slidingly arranged in the shield main machine; the driving device can drive the sliding device to move from a second working position to a first working position; and the extension device is connected between a circulation system on the shield main machine and a circulation system on the first trolley. The present application adopts the first tail shield to replace the second tail shield for sealing operation to realize quick replacement of the shield tail brush for ground reinforcement-free treatment, and the extension device is arranged to adapt to the sliding operation of the sliding device when the second tail shield is switched to the first tail shield, thereby ensuring normal operation of the circulation system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield equipment, and particularly relates to a shield machine and a shield tail sealing brush replacement method. BACKGROUND

[0002] Shield tunnels are in a rapid development stage in China, and large-scale shield tunnel construction faces many problems. When a shield machine passes through water-rich sandy soil or pebble strata for a long distance, the tail shield brush is prone to wear and tear, and even damage, leading to leakage. Therefore, the tail shield brush that has lost its sealing function needs to be replaced.

[0003] At present, one of the most critical technical problems in replacing the tail shield brush in the tunnel is to seal and reinforce the tail shield strata. The commonly used method is chemical grouting reinforcement, which can be divided into precast frozen pipe segment freezing sealing and pipe segment direct hole freezing sealing. The problem with the former is that the special pipe segment with a freezing pipe needs to be made separately. In the face of unexpected tail shield brush replacement, the tail brush replacement work cannot be immediately carried out, and a preplan for tail shield brush replacement needs to be made in advance. This method is not practical for projects with high requirements for rescue and construction period. The pipe segment direct hole freezing sealing method can respond to unexpected accidents, and the hole forms are flexible and diverse, but it is easy to cause permanent damage to the pipe segment due to the freezing hole. In addition, the continuity and uniformity of the frozen curtain cannot be effectively guaranteed. Moreover, when the construction stratum conditions are complex (such as long-distance river crossing and river crossing), the reinforcement and sealing construction difficulty is multiplied, and the risk is greater. It can be seen that in the existing tail shield sealing brush replacement technology, the soil body needs to be reinforced and sealed first, and the pipe segment needs to be removed to replace the tail shield brush. Both methods have the problems of high cost, long time, and high risk of pipe segment removal.

[0004] Therefore, it is necessary to provide a new shield machine and a tail shield sealing brush replacement method to solve the above technical problems. SUMMARY

[0005] The main purpose of the present application is to provide a shield machine and a tail shield sealing brush replacement method, which aims to solve the problems of weak adaptability of the existing shield machine, complex sealing brush replacement process, and long time.

[0006] To achieve the above objectives, the present invention proposes a tunnel boring machine (TBM), comprising a main TBM, a first trolley, a tail shield device, a sliding device, a drive device, and a telescopic device. The main TBM is used for tunneling operations; the first trolley is installed inside the formed tunnel; the tail shield device includes a first tail shield and a second tail shield, with a first end of the first tail shield connected to the main TBM and a second end hinged to the second tail shield, both of which can form a sealed grouting space with the tunnel lining segments; the sliding device is slidably disposed within the main TBM; the drive device is disposed between the sliding device and the main TBM, and can drive the sliding device to move from a second working position to a first working position; the telescopic device is connected between the circulation system on the main TBM and the circulation system on the first trolley, and can extend and retract.

[0007] Optionally, the telescopic device includes an outer sleeve, a telescopic tube, a telescopic sealing assembly, and a telescopic drive assembly. The first end of the outer sleeve is connected to the circulation system inside the tunnel boring machine (TBM). The telescopic tube is slidably fitted inside the outer sleeve, and the second end of the telescopic tube is connected to the circulation system on the first trolley. The telescopic sealing assembly is connected to the second end of the outer sleeve and is slidably fitted outside the telescopic tube. The telescopic drive assembly is hinged between the outer sleeve and the telescopic tube, and is capable of driving the telescopic tube to slide along the outer sleeve.

[0008] Optionally, the telescopic sealing assembly includes the sealing sleeve, the sealing tube, and the telescopic seal. The first end of the sealing sleeve is connected to the second end of the outer sleeve, and the first end of the sealing sleeve forms a stop protruding towards the telescopic tube. The sealing tube includes a tube body and a mounting plate. The tube body is fitted inside the sealing sleeve and connected to the second end of the sealing sleeve through the mounting portion. The telescopic seal is disposed between the sealing sleeve and the telescopic tube, and the telescopic seal abuts against the stop and the tube body.

[0009] Optionally, the telescopic drive assembly includes at least two telescopic drive units arranged opposite each other; the number of telescopic devices is multiple, and the circulation system inside the shield tunneling host is connected to the circulation system on the first vehicle through multiple telescopic devices.

[0010] Optionally, the sliding device includes a sliding body, a propulsion system, and a limiting mechanism. The sliding body is slidably disposed within the shield machine, and the propulsion system includes a plurality of propulsion drive components evenly disposed circumferentially on the sliding body. The limiting mechanism is disposed on the sliding body and can be detachably connected to the shield machine host.

[0011] Optionally, the driving device includes at least four symmetrically arranged driving components. Each driving component includes a slide rail, a driving part, and a gear. The slide rail is disposed inside the shield machine and is provided with a rack. The driving part is disposed on the sliding body. The gear is connected to the output shaft of the driving part and meshes with the rack.

[0012] Optionally, the tail shield device further includes a front hinge seat, a rear hinge seat, a hinge cylinder, and a hinge seal. The front hinge seat is disposed on the first tail shield; the rear hinge seat is disposed on the second tail shield; the hinge cylinder is hinged between the first tail shield and the second tail shield; and the hinge seal is disposed between the first tail shield and the second tail shield to seal the gap between the first tail shield and the second tail shield.

[0013] Optionally, the tunnel boring machine further includes an assembly machine, a second trolley, a segment feeder, support wheels, a first grease system, and a second grease system. The assembly machine is mounted on the sliding body and is used to grab and assemble the tunnel segments. The second trolley is mounted on a traveling track inside the formed tunnel. The segment feeder is located inside the formed tunnel and is correspondingly positioned to the assembly machine, used for storing and transporting the tunnel segments. The first trolley is connected between the assembly machine and the second trolley, and the support wheels can be mounted on the first trolley for temporary support. The first grease system is correspondingly positioned to the first tail shield, and the second grease system is correspondingly positioned to the second tail shield.

[0014] In addition, the present invention also provides a method for quick replacement of the tail seal brush, implemented using the tunnel boring machine as described above, comprising the following steps:

[0015] S1: The tunnel boring machine (TBM) is used for the first stage of tunneling operations, wherein the TBM includes a shield body, a first tail shield, and a second tail shield connected in sequence. During the first stage of tunneling operations, the sealing brush of the second tail shield is used to seal the gap between the TBM and the tunnel segments.

[0016] S2: The sealing condition and tunneling distance of the tunnel boring machine are monitored in real time using monitoring equipment. When the tunnel boring machine tunnels beyond the set tunneling distance, the tunnel boring machine enters the second stage of tunneling operation. After the current segment is assembled, the propulsion system is started to extend and push the segment.

[0017] S3: Install support wheels symmetrically on both sides of the front of the first vehicle, disconnect the connection between the first vehicle and the assembly machine, and remove the connecting parts between the limiting mechanism and the shield machine host; start the propulsion drive to extend the set stroke, and at the same time start the drive device to drive the sliding device to move the first set distance from the second working position to the middle position, and the telescopic device extends the first set distance accordingly.

[0018] S4: Use connectors to connect the limiting mechanism and the shield machine to fix the sliding device in the middle position, and remove the second tail shield from the first tail shield;

[0019] S5: Install the tail shield sealing brush at the corresponding position inside the first tail shield to create a sealed grouting space between the first tail shield and the segments, thus completing the replacement of the tail shield sealing brush.

[0020] Optionally, in step S4, detaching the second tail shield from the first tail shield includes:

[0021] The propulsion drive components retract to avoid an obstacle.

[0022] Remove the articulated hydraulic cylinder and cut off the front and rear articulated seats;

[0023] The second grease system on the second tail shield is cut off to disconnect the first and second tail shields;

[0024] The method for quickly replacing the tail shield sealing brush also includes:

[0025] S6: Using the tunnel boring machine after replacing the tail shield sealing brush to assemble the segments inside the first tail shield; including:

[0026] The first grease system is started to inject sealing grease into the sealed grouting space; at the same time, the first ring segment is assembled and switched using the assembly machine and the propulsion drive, and the propulsion drive is started to extend and hold the first ring segment after switching.

[0027] Extend the travel track inside the formed tunnel, and use a towing mechanism to move the second vehicle along the travel track to move the first vehicle to the first set position, while the telescopic device retracts to the retracted position.

[0028] S7: Disconnect the connecting piece between the limiting mechanism and the shield host again, start the drive device to drive the sliding device to move the second set distance from the middle position to the first working position, and simultaneously start the propulsion drive and the telescopic device to extend the second set distance; remove the slide rail located on the first tail shield;

[0029] S8: Use the connector to connect the limiting mechanism and the shield machine host again to fix the sliding device in the first working position; start the propulsion drive to retract, and use the assembly machine to assemble and switch the second ring segment; then start the propulsion drive to extend and push against the second ring segment after switching.

[0030] S9: Use the towing mechanism to pull the first and second vehicles forward again to the second set position so that the first vehicle is attached to the assembly machine and the first vehicle is hinged and fixed to the assembly machine. At the same time, activate the telescopic device to retract synchronously to the initial length, and complete the switch from the second tail shield to the first tail shield.

[0031] In the technical solution of this invention, the shield tail brush is quickly replaced by replacing the second tail shield with the first tail shield for sealing operations, thereby achieving the goal of eliminating the need for ground reinforcement treatment. Furthermore, a telescopic device is provided to accommodate the sliding movement of the sliding device when switching from the second tail shield to the first tail shield, ensuring the normal operation of the circulation system. This effectively solves the problems of high cost, long time consumption, and high risk of dismantling and transporting segments in the prior art for soil freezing reinforcement. It can effectively reduce construction risks, improve the overall sealing performance of the equipment, and expand the applicable range of ground conditions. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure in Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the telescopic device in Embodiment 1 of the present invention;

[0035] Figure 3 This is a schematic diagram of the telescopic device in the retracted state position in Embodiment 1 of the present invention;

[0036] Figure 4 This is a schematic diagram of the telescopic device in the extended position in Embodiment 1 of the present invention;

[0037] Figure 5 for Figure 1 MM section view;

[0038] Figure 6 for Figure 1 PP sectional view;

[0039] Figure 7 This is a schematic diagram of the hinge joint between the first shield body and the second shield body in Embodiment 1 of the present invention;

[0040] Figure 8 This is a construction diagram of S2 in Embodiment 2 of the present invention;

[0041] Figure 9 This is a construction diagram of S3 in Embodiment 2 of the present invention;

[0042] Figure 10 This is a construction diagram of S4 in Embodiment 2 of the present invention;

[0043] Figure 11 This is a construction schematic diagram of S5 in Embodiment 2 of the present invention;

[0044] Figure 12 This is a construction schematic diagram of S6 in Embodiment 2 of the present invention;

[0045] Figure 13 This is a construction schematic diagram of S7 in Embodiment 2 of the present invention;

[0046] Figure 14 This is a construction schematic diagram of S8 in Embodiment 2 of the present invention;

[0047] Figure 15 This is a construction schematic diagram of S9 in Embodiment 2 of the present invention;

[0048] Figure 16 This is a construction diagram of S10 in Embodiment 2 of the present invention.

[0049] Explanation of icon numbers:

[0050] 1. Shield tunneling machine; 11. Assembly machine; 12. First vehicle; 13. Second vehicle; 14. Slab feeder; 15. Formed tunnel; 121. Support wheel; 131. Traveling track; 100. Sliding device; 110. Propulsion system; 120. Limiting mechanism; 130. Sliding body; 200. Drive device; 210. Slide rail; 220. Gear; 300. Tail shield device; 310. Second tail shield; 320. First tail shield; 330. Articulated cylinder; 331. Rear articulated seat; 332. Front articulated seat; 340. Articulated seal; 400. Telescopic device; 410. Outer sleeve; 420. Telescopic pipe; 430. Sealing sleeve; 431. Stop block; 440. Sealing pipe; 441. Pipe body; 442. Mounting plate; 450. Telescopic seal; 460. Telescopic drive assembly.

[0051] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0053] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0054] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0057] This invention proposes a method for replacing the sealing brush of a tunnel boring machine (TBM) and its tail, aiming to solve the problems of weak adaptability of existing TBMs, complex sealing brush replacement procedures, and long replacement time.

[0058] Example 1

[0059] See Figures 1 to 6 The tunnel boring machine in this embodiment includes: a sliding device 100, a driving device 200, a tail shield device 300, a telescopic device 400, a tunnel boring machine host 1, and a first vehicle 12, the first vehicle 12 being installed inside the formed tunnel 15.

[0060] Furthermore, the sliding device 100 is coaxially arranged inside the shield machine 1, and includes at least a sliding body 130, a propulsion system 110, and a limiting mechanism 120. The propulsion system 110 is uniformly fixed to the sliding body 130 circumferentially. The sliding body 100 moves between a first working position and a second working position along the length direction of the shield machine 1, with a maximum stroke set to S. When the sliding device 100 slides backward to the set position, the end of its propulsion system 100 just abuts against the mounting seat on the inner partition of the shield machine. The limiting mechanism 120 is connected to the inner wall of the shield machine 1 through a connector to fix and limit the sliding device. In this embodiment, S is the width of two ring segments; if the segment is 1.5m wide, S is 3m; if the segment is 2m wide, S is 4m.

[0061] After the sealing brush is replaced, the sliding body 130 slides backward from the second working position to the first working position, and the end of its propulsion system 100 just abuts against the mounting seat on the inner partition of the shield machine host.

[0062] Furthermore, the drive unit 200 is disposed between the shield machine host 1 and the sliding device 100, including slide rails 210 and 210 and drive units 220. The slide rails 210 and 210 are fixed in four groups inside the shield machine host and are arranged symmetrically from left to right. The slide rails 210 and 210 pass through the sliding body 130 from front to back and slide in cooperation with the sliding body 130 to guide and prevent the sliding body 130 from rotating. A rack is provided at the upper end of the slide rails 210 and 210. The drive units 220 are fixed in four groups inside the sliding device 100 and are arranged symmetrically from left to right. A drive gear 220 is provided on the drive unit 220 and meshes with the rack. The four groups of drive units 220 can realize synchronous start and stop operation. The drive unit 200 assists in the forward and reverse operation to realize the forward and backward movement of the sliding device 100.

[0063] Furthermore, the telescopic device 400 is arranged in several groups between the rear of the shield machine 1 and the front of the first vehicle 11, including an outer sleeve 410, a telescopic pipe 420, a sealing sleeve 430, a sealing pipe 440, a telescopic sealing element 450, and a telescopic drive assembly 460. The front end of the outer sleeve 410 is bolted to the rear end circulation system inside the shield machine 1; the telescopic pipe 420 is sleeved inside the outer sleeve 410, and its rear end is bolted to the front end of the circulation system on the first vehicle 12; the front end of the sealing sleeve 430 is bolted to the rear end of the outer sleeve 410; the front end of the sealing pipe 440 is located between the outside of the telescopic pipe and the inside of the sealing sleeve, and its rear end is bolted to the rear end of the sealing sleeve; the telescopic sealing element 450 is located between the outside of the telescopic pipe and the inside of the sealing sleeve, and relies on the front end of the sealing pipe 440. The components are pressed along the axis; the telescopic drive assembly 460 is set between the outer sleeve 410 and the telescopic tube 420; the front end of the telescopic drive assembly 460 is provided with a hinge seat and is fixedly connected to the outer wall of the outer sleeve 410, and the rear end is provided with a hinge seat and is fixedly connected to the outer wall of the telescopic tube 420; the total length of the telescopic device 400 in the retracted state is set to L1; the total length of the telescopic device 400 in the extended state is set to L2; the telescopic length of the telescopic device 400 is set to be not less than the maximum sliding stroke S of the sliding device, that is, (L2-L1)≮S, to ensure that the circulation system is connected in real time. In this embodiment, the first end of the sealing sleeve 430 forms a stop 431 that protrudes toward the telescopic tube 420; the sealing tube 440 includes a tube body 441 and a mounting plate 442, the tube body 441 is sleeved inside the sealing sleeve 430 and is connected to the second end of the sealing sleeve 430 through the mounting part; the telescopic seal 450 is disposed between the sealing sleeve 430 and the telescopic tube 420, and the telescopic seal 450 abuts against the stop 431 and the tube body 441.

[0064] Furthermore, see alsoFigure 7 The tail shield device 300 is located at the rear of the shield machine 1, comprising a first tail shield 310, a second tail shield 320, a hinge cylinder 330, and a hinge seal 340. The front of the first tail shield 310 is fixedly connected to the shield machine 1, maintaining the same inner diameter. The front of the second tail shield 320 is sleeved and connected to the rear of the first tail shield 310, and is hinged by the hinge cylinder 330. The front hinge seat of the hinge cylinder 330 is fixedly connected to the inner wall of the first tail shield. The rear hinge seat of the hinge cylinder 330 is fixedly connected to the inner wall of the second tail shield. A hinge seal 340 is provided between the hinge joint of the second tail shield 320 and the first tail shield 310 to ensure good sealing at the hinge joint. Shield tail sealing brushes can be provided on the rear inner walls of both the first tail shield 310 and the second tail shield 320.

[0065] Furthermore, the tunnel boring machine (TBM) also includes at least an assembly machine 11, a second trolley 13, and a segment feeder 14. The front of the assembly machine 11 is fixed to the rear end of the sliding device 100 and can grab and assemble the tunnel segments. Support wheels 121 can be symmetrically installed on the lower areas of both sides of the front of the first trolley 12 for temporary support of the front of the first trolley. The front of the first trolley 12 is attached to the rear of the assembly machine 11, and its rear is attached to the second trolley. The second trolley 13 is set inside the formed tunnel 15 and runs parallel to the travel track 131. Its trolley has an equipment area. The segment feeder 14 is set at the bottom of the tunnel for storing and transporting the tunnel segments. The TBM host 1 is also equipped with a monitoring system to monitor the wear and sealing performance of the tail shield sealing brush in real time. The TBM host 1 is also equipped with a control system to provide support for all actions in this embodiment.

[0066] Example 2

[0067] This embodiment provides a method for replacing the tail shield sealing brush, including the following steps:

[0068] S1: When the tunnel boring machine needs to carry out long-distance construction, a second tail shield 310 and its sealing brush are hinged and fixed at its tail. The sliding device 100 is fixed in the second working position, the telescopic device 400 is extended, and the tunnel boring machine starts excavation normally.

[0069] Specifically, the tunnel boring machine (TBM) is used for the first stage of tunneling. The TBM includes a shield body, a first tail shield 320, and a second tail shield 310 connected in sequence. During the first stage of tunneling, the sealing brush of the second tail shield 310 is used to seal the gap between the TBM and the tunnel lining segments.

[0070] S2: As Figure 8When the equipment has made normal tunneling and reached the set tunneling distance, the sealing brush needs to be replaced. The tail shield and sealing brush quick switching measures are activated. At the same time, the sealing condition of the tunnel boring machine is monitored in real time to ensure that the articulated seal 340 is in good condition. The last ring of segments is assembled before switching. The propulsion drive extends and pushes on the segment. In this embodiment, the propulsion drive is a hydraulic cylinder.

[0071] Specifically, the monitoring equipment is used to monitor the sealing condition and tunneling distance of the tunnel boring machine in real time. When the tunnel boring machine tunnels beyond the set tunneling distance, the tunnel boring machine enters the second stage of tunneling operation. After the current segment is assembled, the propulsion system 110 is started to extend and push the segment.

[0072] S3: As Figure 9 Support wheels 121 are symmetrically installed on both sides of the front of the first vehicle 12. The connection between the first vehicle 12 and the assembly machine 11 is disconnected, and the limiting mechanism 120 between the sliding device 100 and the shield machine host 1 is disconnected. The propulsion drive is started to extend all the set stroke, and at the same time the drive device 200 is started to assist the sliding device 100 to move forward for the first time. In this embodiment, the set stroke is the width of one ring of tunnel segments, which is 1.5m.

[0073] Specifically, support wheels 121 are symmetrically installed on both sides of the front of the first vehicle 12, and the connection between the first vehicle 12 and the assembly machine 11 is disconnected. The connecting limit mechanism 120 and the shield machine host 1 are disconnected. The propulsion drive is started to extend the set stroke. At the same time, the drive device 200 is started to drive the sliding device 100 to move the first set distance from the second working position to the middle position, and the telescopic device 400 extends the first set distance accordingly.

[0074] S4: As Figure 10 Install the limiting mechanism 120 to fix the sliding device 100 in the middle position, then remove the articulated cylinder 330 in sequence, cut off the front and rear articulated seats 331, and cut off the grouting / grease injection structure on the second tail shield 310. Note that the cylinder should retract to avoid the removal during disassembly / cutting.

[0075] Specifically, the limiting mechanism 120 and the shield machine 1 are connected by a connector to fix the sliding device 100 in the middle position, and the second tail shield 310 is detached from the first tail shield 320; the detachment of the second tail shield 310 from the first tail shield 320 includes:

[0076] The propulsion drive components retract to avoid an obstacle.

[0077] Remove the articulated cylinder 330 and cut off the front articulated seat 332 and the rear articulated seat 331;

[0078] The second grease system on the second tail shield 310 is cut off to disconnect the first tail shield 320 and the second tail shield 310;

[0079] S5: As Figure 11 After all the articulated hydraulic cylinder 330 seats are removed, new shield tail sealing brushes are installed (welded) sequentially at the set positions on the inner wall of the first tail shield 320. Note that during installation, the hydraulic cylinders retract to avoid the brushes.

[0080] Specifically, a tail seal brush is installed at the corresponding position inside the first tail shield 320 to create a sealed grouting space between the first tail shield 320 and the tunnel lining segments, thus completing the replacement of the tail seal brush.

[0081] S6: As Figure 12 The grease system corresponding to the first tail shield 320 is activated to inject sealing grease into the newly installed tail brush. Simultaneously, the first ring segment is assembled and switched, with all propulsion drive components pressing against the switched first ring segment to provide support reaction force. Then, the traveling track 131 is laid, and the rear-mounted trolley is pulled forward to the first set position using a towing mechanism. At the same time, the telescopic device 400 is activated to retract synchronously to the retracted position. In this embodiment, the towing mechanism is a hand-operated hoist, etc.

[0082] Specifically: using the tunnel boring machine after replacing the tail shield sealing brush to assemble the segments within the first tail shield 320; including:

[0083] The first grease system is started to inject sealing grease into the sealed grouting space; at the same time, the assembly machine 11 and the propulsion drive are used to assemble and switch the first ring segment, and the propulsion drive is started to extend and hold the first ring segment after switching.

[0084] The travel track 131 inside the extended tunnel 15 is extended, and the second vehicle 13 is moved along the travel track 131 by the towing mechanism to move the first vehicle 12 to the first set position, while the telescopic device 400 retracts to the initial length.

[0085] S7: As Figure 13 Then, the limiting mechanism 120 of the sliding device 100 is removed again, and then the drive device 200 is started to assist the sliding device 100 to move forward again. At the same time, the propulsion drive is started to extend to the second set distance (it must be ensured that the shield host 1 does not move relative to it). During this period, the telescopic device 400 is started to extend to the extended position until the sliding device 100 moves to the first working position. The tail of all the propulsion drive parts abuts against the mounting seat on the inner partition of the shield host 1. Then, the rear section slide rail 210 is removed. In this embodiment, the stroke from the second working position to the first working position is S.

[0086] Specifically:

[0087] Disconnect the connecting piece between the limiting mechanism 120 and the shield host 1 again, start the drive device 200 to drive the sliding device 100 to move from the middle position to the first working position by a second set distance, and simultaneously start the propulsion drive and the telescopic device 400 to extend the second set distance; remove the slide rail 210 located on the first tail shield 320.

[0088] S8: As Figure 14 Install the limit mechanism 120 again and fasten the sliding device 100. Start the retraction of the propulsion drive and assemble the next ring segment at the same time until the second ring segment is assembled after switching, and all propulsion drive components push against the segment.

[0089] Specifically:

[0090] The limiting mechanism 120 and the shield machine host 1 are connected again to fix the sliding device 100 in the first working position; the propulsion drive is started to retract, and the assembly machine 11 is used to assemble and switch the second ring segment; then the propulsion drive is started to extend and push against the second ring segment after switching.

[0091] S9: As Figure 15 The propulsion drive provides support and reaction force again, and the dragging mechanism (hand chain hoist, etc.) pulls the rear supporting trolley forward to the second set position, which is just connected to the rear end of the assembly machine 11 and hinged and fixed. At the same time, the telescopic device 400 is activated to retract to the retracted position, completing the tail shield replacement.

[0092] Specifically:

[0093] The first vehicle 12 and the second vehicle 13 are pulled forward again to the second set position by the towing mechanism so that the first vehicle 12 is attached to the assembly machine 11 and the first vehicle 12 is hinged and fixed to the assembly machine 11. At the same time, the telescopic device 400 is activated to retract to the initial length again, completing the switch from the second tail shield 310 to the first tail shield 320.

[0094] S10: As Figure 16 The tunnel boring machine resumed normal tunneling, completed the installation of the new tail shield sealing brush and the disposal of the second tail shield 310 shell, and achieved safe switching of the tail shield seal without the need for ground reinforcement.

[0095] Since the quick replacement method for the tail shield sealing brush includes the tunnel boring machine as described above, it possesses all the beneficial effects of the aforementioned tunnel boring machine, which will not be elaborated upon here.

[0096] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A tunneling machine characterized by, The shield tunneling machine comprises a shield main machine (1), a first trolley (12), a shield tail device, a sliding device (100), a driving device (200) and a telescopic device (400), the shield main machine (1) is used for tunneling operation; the first trolley (12) is arranged in a formed tunnel (15); the shield tail device comprises a first tail shield (320) and a second tail shield (310), a first end of the first tail shield (320) is connected with the shield main machine (1), a second end is hinged with the second tail shield (310), the first tail shield (320) and the second tail shield (310) can form a sealed grouting space with a segment; the sliding device (100) is slidingly arranged in the shield main machine (1); the driving device (200) is arranged between the sliding device (100) and the shield main machine (1), and can drive the sliding device (100) to move from a second working position to a first working position; the telescopic device (400) is connected between a circulation system on the shield main machine (1) and a circulation system on the first trolley (12), and the telescopic device (400) can be telescoped; The telescopic device (400) comprises an outer sleeve (410), a telescopic pipe (420), a telescopic sealing assembly and a telescopic driving assembly (460), a first end of the outer sleeve (410) is connected with the circulation system in the shield main machine (1); the telescopic pipe (420) is slidingly arranged in the outer sleeve (410), a second end of the telescopic pipe (420) is connected with the circulation system on the first trolley (12); the telescopic sealing assembly is connected with the second end of the outer sleeve (410), and the telescopic sealing assembly is slidingly arranged outside the telescopic pipe (420); the telescopic driving assembly (460) is hinged between the outer sleeve (410) and the telescopic pipe (420), and the telescopic driving assembly (460) can drive the telescopic pipe (420) to slide along the outer sleeve (410); The telescopic sealing assembly comprises the sealing sleeve (430), a sealing pipe (440) and a telescopic sealing piece (450), a first end of the sealing sleeve (430) is connected with the second end of the outer sleeve (410), and the first end of the sealing sleeve (430) forms a stopper (431) protruding towards the telescopic pipe (420); the sealing pipe (440) comprises a pipe body (441) and a mounting plate (442), the pipe body (441) is arranged in the sealing sleeve (430), and the second end of the sealing sleeve (430) is connected with the mounting plate (442); the telescopic sealing piece (450) is arranged between the sealing sleeve (430) and the telescopic pipe (420), and the telescopic sealing piece (450) abuts between the stopper (431) and the pipe body (441).

2. The tunneling machine of claim 1, wherein, The telescopic drive assembly (460) comprises at least two telescopic drive units arranged oppositely; the number of the telescopic devices (400) is multiple, and the circulation system in the shield main machine (1) and the circulation system on the first trolley (12) are communicated through the multiple telescopic devices (400).

3. The tunneling machine of any one of claims 1 to 2, wherein, The sliding device (100) comprises a sliding body (130), a propulsion system (110) and a limiting mechanism (120), the sliding body (130) is arranged in the shield main machine (1) in a sliding mode, and the propulsion system (110) comprises multiple propulsion drive units arranged uniformly in the circumferential direction of the sliding body (130); the limiting mechanism (120) is arranged on the sliding body (130), and the limiting mechanism (120) can be detachably connected with the shield main machine (1).

4. The tunneling machine of claim 3, wherein, The drive device (200) comprises at least four groups of drive assemblies arranged symmetrically, the drive assembly comprises a sliding rail (210), a driving part and a gear (220), the sliding rail (210) is arranged in the shield main machine (1), and the sliding rail (210) is provided with a rack; the driving part is arranged on the sliding body (130); the gear (220) is connected with the output shaft of the driving part, and the gear (220) is engaged with the rack.

5. The tunneling machine of claim 4, wherein, The tail shield device (300) further comprises a front hinged seat (332), a rear hinged seat (331), a hinged oil cylinder (330) and a hinged seal (340), the front hinged seat (332) is arranged on the first tail shield (320); the rear hinged seat (331) is arranged on the second tail shield (310); the hinged oil cylinder (330) is hinged between the first tail shield (320) and the second tail shield (310); the hinged seal (340) is arranged between the first tail shield (320) and the second tail shield (310), and is used for sealing the gap between the first tail shield (320) and the second tail shield (310).

6. The tunneling machine of claim 5, wherein, The shield tunneling machine further comprises an assembling machine (11), a second trolley (13), a pipe feeding machine (14), a supporting wheel (121), a first grease system and a second grease system, the assembling machine (11) is arranged on the sliding body (130) and is used for grabbing and assembling the pipe segments; the second trolley (13) is arranged on a walking track (131) in the forming tunnel (15); the pipe feeding machine (14) is arranged in the forming tunnel (15), and the pipe feeding machine (14) is arranged correspondingly with the assembling machine (11) and is used for storing and conveying the pipe segments; the first trolley (12) is overlapped between the assembling machine (11) and the second trolley (13), the supporting wheel (121) can be arranged on the first trolley (12) and is used for temporarily supporting the first trolley (12); the first grease system is arranged correspondingly with the first tail shield (320); and the second grease system is arranged correspondingly with the second tail shield (310).

7. A method for quick replacement of a tail seal brush for a tunneling machine according to claim 6, characterized in that The method comprises the following steps: S1: using a shield machine to carry out a first stage of tunneling operation, wherein the shield machine comprises a shield main body, a first tail shield (320) and a second tail shield (310) connected in sequence, and the second tail shield (310) is used to seal the gap between the shield machine and the segment in the first stage of tunneling operation; S2: using a monitoring device to monitor the sealing condition and the tunneling distance of the shield machine in real time, when the shield machine tunnels more than a set tunneling distance, the shield machine enters a second stage of tunneling operation, and after the assembly of the current segment is completed, the pushing system (110) is started to extend and push on the segment; S3: symmetrically installing support wheels (121) on both sides of the front part of the first trolley (12), disconnecting the connection between the first trolley (12) and the assembling machine (11), and disconnecting the connecting limiting mechanism (120) and the shield main machine (1); starting the pushing driving member to extend a set stroke, and starting the driving device (200) to drive the sliding device (100) to move a first set distance from the second working position to the intermediate position, and the telescopic device (400) corresponds to the first set distance of extension; S4: connecting the limiting mechanism (120) and the shield main machine (1) to fix the sliding device (100) at the intermediate position, and disconnecting the second tail shield (310) from the first tail shield (320); S5: installing a shield tail sealing brush at a corresponding position in the first tail shield (320) to form a sealed grouting space between the first tail shield (320) and the segment, and completing the replacement of the shield tail sealing brush.

8. The method of claim 7, wherein the shield tail seal brush is replaced by removing the brush from the shield tail seal assembly. In S4, disconnecting the second tail shield (310) from the first tail shield (320) comprises: starting the pushing driving member to retract to avoid; removing the hinged oil cylinder (330), and cutting off the front hinged seat (332) and the rear hinged seat (331); cutting off the second grease system on the second tail shield (310) to disconnect the first tail shield (320) and the second tail shield (310); The shield tail sealing brush quick replacement method further comprises: S6: using the shield machine after replacing the shield tail sealing brush to assemble the segment in the first tail shield (320); comprising: starting the first grease system to inject sealing grease into the sealed grouting space; at the same time, using the assembling machine (11) and the pushing driving member to cooperate with the first ring segment after switching, and starting the pushing driving member to extend and push against the first ring segment after switching; extending the walking track (131) in the formed tunnel (15), and using the dragging mechanism to move the second trolley (13) along the walking track (131) to drive the first trolley (12) to move to the first set position, and the telescopic device (400) retracts to the retracted state position; S7: disconnecting the connecting limiting mechanism (120) and the shield main machine (1) again, starting the driving device (200) to drive the sliding device (100) to move a second set distance from the intermediate position to the first working position, and synchronously starting the pushing driving member and the telescopic device (400) to extend the second set distance; removing the sliding rail (210) located on the first tail shield (320); S8: The connecting piece is used again to connect the limiting mechanism (120) and the shield main machine (1) to fix the sliding device (100) to the first working position; the pushing driving part is started to retract, and the assembling machine (11) is used to assemble the second ring pipe piece after switching, and the pushing driving part is started to extend to press against the second ring pipe piece after switching; S9: The first trolley (12) and the second trolley (13) are pulled forward again to the second set position by using the dragging mechanism, so that the first trolley (12) is overlapped on the assembling machine (11), and the first trolley (12) is hingedly fixed and connected with the assembling machine (11), and at the same time, the telescopic device (400) is started to retract again to the initial length synchronously, and the switching of the second tail shield (310) to the first tail shield (320) is completed.

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