A double-structure TBM and construction method thereof

Abstract

The invention discloses a dual-structure TBM and a construction method thereof, comprising a shield with a shield body propulsion cylinder arranged in the circumferential direction, a main drive connected to the shield through the shield body cylinder, a cutterhead connected to the front of the main drive, a main beam connected to the rear of the main drive, a spray anchor support excavation unit and a segment support excavation unit arranged on the main beam, the spray anchor support excavation unit comprising a steel arch frame assembly machine, an anchor drilling machine and a concrete spraying manipulator, a main beam propulsion cylinder arranged at the rear of the anchor drilling machine, the front end of the main beam propulsion cylinder is hinged on the main beam, and the rear end is hinged with a shoe unit, the shoe unit is slidably arranged along the axis of the main beam, a rear support unit is slidably arranged on the main beam behind the shoe unit, and the segment support excavation unit comprises a segment assembly machine, and the segment assembly machine, the steel arch frame assembly machine, the anchor drilling machine and the concrete spraying manipulator are all arranged at the rear of the shield. The invention can realize the conversion between the spray anchor support excavation mode and the segment support excavation mode.

Description

Technical Field

[0001] The invention relates to the technical field of shield machines, in particular to a double-structure TBM. Background Art

[0002] With the vigorous development of China's shield industry, the application of hard rock tunnel boring machines (TBMs) has become more and more common. TBMs can be divided into open TBMs and shield TBMs.

[0003] The open-type TBM uses the propulsion cylinder to provide forward power for the main machine, and the support shoes hold the tunnel wall tightly to provide reaction force for the propulsion cylinder. The open-type adopts the spray anchor support method, which mainly installs steel arch frames, steel bars, anchor rods, sprayed concrete, etc. The shield of the open-type TBM is short and retractable, and the risk of machine jam is low. However, when crushing the surrounding rock, the arch will cause serious slag, which is easy to cause a large workload of support and slag removal. The support shoes cannot directly hold the crushed surrounding rock, and the excavation efficiency is greatly reduced. When excavating in rock burst formations, personnel and equipment are exposed and lack protection, and the safety risk is high.

[0004] The shield-type TBM uses the propulsion cylinder to provide the main machine with forward power, and the pipe segment provides the reaction force for the propulsion cylinder. The shield-type TBM adopts the pipe segment support method. The shield-type TBM has a higher risk of jamming due to its long shield body, especially when excavating in large deformation convergence strata. The jamming treatment time is long, which affects the excavation efficiency.

[0005] Due to the complexity and diversity of the stratum structure, a single-structure TBM cannot meet the construction needs. It is difficult to construct a single-structure TBM in a fault-fragmented zone, a soft rock with large deformation, a high-stress rockburst stratum, and other unfavorable geological conditions. In addition, the existing TBM cannot flexibly switch between shotcrete support and segment support. Therefore, any single-structure TBM has certain limitations when facing complex surrounding rock geology. Summary of the invention

[0006] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a dual-structure TBM, which solves the technical problem that the existing TMB cannot be fully applied in adverse geological conditions such as rock bursts, large deformations, fault fracture zones, and altered rocks.

[0007] The technical solution of the present invention is implemented as follows: a dual-structure TBM includes a shield, a shield propulsion cylinder is arranged around the shield, a main drive is connected to the shield through the shield cylinder, a cutterhead is connected to the front of the main drive, and a main beam is connected to the rear of the main drive, and a sprayed anchor support excavation unit and a segment support excavation unit are arranged on the main beam, and the sprayed anchor support excavation unit and the segment support excavation unit can be easily converted to each other to adapt to complex and changeable geological excavation. The sprayed anchor support excavation unit includes a steel arch frame assembly machine, an anchor drilling machine and a concrete spraying manipulator, and the steel arch frame assembly machine, the anchor drilling machine and the concrete spraying manipulator can respectively perform steel arch frame assembly, anchor support and concrete spraying support. A main beam propulsion cylinder is arranged at the rear of the anchor drilling rig. The front end of the main beam propulsion cylinder is hinged on the main beam, and the rear end is hinged with a support shoe unit. The support shoe unit is slidably arranged along the axis of the main beam. The support shoe unit can cooperate with the steel arch frame assembly machine, the anchor drilling rig and the concrete spraying manipulator to carry out anchor spraying support excavation. A rear support unit is slidably arranged on the main beam behind the support shoe unit. The segment support excavation unit includes a segment assembly machine. The rear support unit can cooperate with the segment assembly machine and the shield propulsion cylinder to carry out segment assembly excavation. The segment assembly machine, the steel arch frame assembly machine, the anchor drilling rig and the concrete spraying manipulator are all arranged at the rear of the shield, which cleverly avoids the interference of the shield with the support devices such as the segment assembly machine, the steel arch frame assembly machine, the anchor drilling rig and the concrete spraying manipulator.

[0008] Furthermore, the shield includes an upper shield and a lower shield, and a left shield and a right shield that are symmetrical on the left and right. A connecting shield is provided between the upper shield and the left and right shields, and between the lower shield and the left and right shields. One end of the connecting shield is hinged to the upper shield or the lower shield, and the other end is plugged into and matched with the left shield or the right shield.

[0009] Furthermore, the shield body cylinder is arranged between the main drive and the upper shield, the left shield and the right shield. The shield body cylinder can be extended and retracted according to the excavation situation, thereby adjusting the shape of the shield body, avoiding the risk of shield jamming and improving the traffic performance. The shield body propulsion cylinder is respectively arranged on the upper shield, the lower shield, the left shield and the right shield.

[0010] Furthermore, the segment assembly machine and the steel arch assembly machine are integrated into one machine, making the entire device more compact and saving installation and operation space. The segment assembly machine is arranged in front of the anchor drilling machine, effectively ensuring the convenience of segment support.

[0011] Furthermore, the shoe support unit includes a saddle frame slidably sleeved on the main beam, a saddle frame oil cylinder is provided at the bottom end of the saddle frame, and a saddle frame shoe plate is provided at the bottom end of the saddle frame oil cylinder. The saddle frame oil cylinder can drive the saddle frame shoe plate to extend and retract, thereby being able to meet the support of the saddle frame to the main beam, and also facilitating the switching of step and excavation mode. The left and right sides of the saddle frame are respectively connected to a left shoe support cylinder and a right shoe support cylinder, and the outer ends of the left shoe support cylinder and the right shoe support cylinder are both hinged with shoe support.

[0012] Furthermore, the saddle frame includes a left saddle plate and a right saddle plate, and the bottom ends of the left saddle plate and the right saddle plate are both provided with saddle frame cylinders. The left saddle plate and the right saddle plate are connected by an upper crossbeam and a lower crossbeam, and the main beam is inserted between the left saddle plate, the right saddle plate, the upper crossbeam and the lower crossbeam.

[0013] Furthermore, the upper cross beam includes a front upper cross beam and a rear upper cross beam connected to the front sides of the left saddle plate and the right saddle plate, the lower cross beam includes a front lower cross beam and a rear lower cross beam connected to the rear sides of the left saddle plate and the right saddle plate, and the left support shoe cylinder and the right support shoe cylinder are arranged between the front upper cross beam and the rear upper cross beam.

[0014] Furthermore, the left front leg and the right front leg are hingedly connected by a front hinge shaft, and the left rear leg and the right rear leg are hingedly connected by a rear hinge shaft. The hinged connection method allows each saddle frame leg to rotate relative to each other at the hinge, so as to drive the main beam to swing up and down, left and right, and rotate circumferentially under the action of external force.

[0015] Furthermore, the left shoe support cylinder and the right shoe support cylinder each include an upper shoe support cylinder and a lower shoe support cylinder corresponding to each other. The two upper shoe support cylinders are fixedly connected by a connecting shaft. A mounting groove and a vertical hole passing through the mounting groove are provided on the connecting shaft. A horizontal axis is movably arranged in the mounting groove. The size of the mounting groove is larger than the size of the horizontal axis. The front end of the horizontal axis is connected to the front upper cross beam, and the rear end is connected to the rear upper cross beam. A saddle frame vertical axis is arranged in the vertical hole. The saddle frame vertical axis passes through the horizontal axis and is hingedly connected to the horizontal axis.

[0016] Furthermore, a left-right symmetrical front vertical adjustment cylinder is arranged between the saddle frame and the gripper cylinder, one end of the two front vertical adjustment cylinders is hinged to the left saddle plate or the right saddle plate, and the other end is hinged to the gripper cylinder. Driven by the front vertical adjustment cylinder, the saddle frame can be lifted, lowered and rotated relative to the gripper.

[0017] Furthermore, the rear support unit comprises a rear support sliding frame slidably sleeved on the main beam, and rear vertical adjustment cylinders are arranged on both sides of the rear support sliding frame, and the upper end of the rear vertical adjustment cylinder is hinged to the rear support sliding frame, and the lower end is hinged to the rear support. Under the drive of the rear vertical adjustment cylinder, the rear support sliding frame can be driven to lift, lower and rotate relative to the support shoe cylinder.

[0018] Furthermore, the rear support is an inverted U-shaped box, and rear support cylinders are arranged in the left and right side cavities of the rear support. The upper end of the rear support cylinder is hinged to the rear support, and the lower end is hinged to the rear support boot.

[0019] Furthermore, a double-acting oil cylinder is arranged in the horizontal cavity connecting the left and right side cavities on the rear support, and a mounting opening is provided in the horizontal cavity. The housing of the double-acting oil cylinder is hinged on the rear support sliding frame through the mounting opening, and the two ends of the double-acting oil cylinder are respectively hinged on the rear support. The double-acting oil cylinder can drive the rear support sliding frame to move left and right, and can also cooperate with the rear vertical adjustment oil cylinder to drive the rear support sliding frame to rotate, thereby driving the main beam to rotate.

[0020] Furthermore, a rear support sliding cylinder is arranged between the rear support sliding frame and the main beam. The rear support sliding cylinder is arranged along the axis of the main beam. One end of the rear support sliding cylinder is hinged to the main beam, and the other end is hinged to the rear support sliding frame.

[0021] A construction method of a dual-structure TBM includes a shotcrete support excavation mode and a segment support excavation mode. The shotcrete support excavation mode includes the following steps:

[0022] Step 1: Excavation, control the support shoe cylinder to extend, the support shoe holds the tunnel wall tightly to provide reaction force for the TBM to advance forward, control the rear support cylinder to retract, the rear support shoe plate leaves the tunnel wall, control the main beam propulsion cylinder to extend, and the main beam drives the cutterhead to advance forward;

[0023] Step 2: Support. During the excavation process in step 1, the steel arch frame assembly machine is controlled to assemble the steel arch frame, the anchor drilling machine is controlled to perform anchor support, and the concrete spraying manipulator is controlled to perform concrete spraying support;

[0024] Step 3: Change the step. When the main beam propulsion cylinder in step 1 reaches the end of the extension stroke, the rear support cylinder in step 1 is controlled to extend, and the rear support shoe plate holds the tunnel wall tightly. The support shoe cylinder in step 1 is controlled to retract, and the support shoe leaves the tunnel wall. The main beam propulsion cylinder that has reached the end of the extension stroke is controlled to retract to the end of the retraction stroke. The main beam propulsion cylinder drives the saddle frame to slide forward along the main beam to the next holding position.

[0025] Step 4: Repeat steps 1, 2 and 3 in sequence;

[0026] The segment support excavation mode comprises the following steps:

[0027] Step 5: Excavation, control the rear support cylinder to extend, the rear support cylinder drives the rear support shoe plate to hold the tunnel wall tightly, control the saddle frame cylinder to retract, the saddle frame cylinder drives the saddle frame shoe plate to leave the tunnel wall, control the shoe cylinder to retract, the shoe cylinder drives the shoe to leave the tunnel wall, synchronously control the shield propulsion cylinder and the rear support sliding cylinder to extend, the shield propulsion cylinder presses on the rear segment to provide reaction force for the TBM to advance forward, and at the same time the main beam moves forward relative to the rear support sliding frame, and the cutterhead excavates forward synchronously;

[0028] Step six, support, when the shield body propulsion cylinder in step four reaches the end of the extension stroke, the shield body propulsion cylinder in step five is controlled to be retracted, and the segment assembling machine is controlled to assemble the segments at the position before the shield body propulsion cylinder is retracted;

[0029] Step 7, change the step, control the saddle frame cylinder in step 4 to extend, the saddle frame cylinder drives the saddle frame boot plate to support on the tunnel wall, control the shield body propulsion cylinder in step 5 to retract, the rear support cylinder drives the rear support boot plate to leave the tunnel wall, control the rear support sliding cylinder to retract, and the rear support sliding cylinder drives the rear support unit to slide forward along the main beam to the next support position;

[0030] Step 8: Repeat steps 5, 6, and 7 in sequence.

[0031] Furthermore, the shotcrete support excavation mode also includes a mode one direction adjustment control, and the mode one direction adjustment control includes a mode one up and down direction adjustment. During the up and down direction adjustment in mode one, the front vertical direction adjustment cylinder is controlled to extend or retract, and the front vertical direction adjustment cylinder drives the main beam to swing up and down.

[0032] Furthermore, the mode one steering control includes mode one left and right steering. During mode one left and right steering, the left support shoe cylinder is controlled to extend and the right support shoe cylinder is controlled to retract at the same time, or the left support shoe cylinder is controlled to retract and the right support shoe cylinder is controlled to extend at the same time. The left support shoe cylinder and the right support shoe cylinder drive the main beam to swing left and right.

[0033] Furthermore, the mode one steering control includes mode one rotation steering. During mode one rotation steering, the front vertical steering cylinder on one side is controlled to extend and the front vertical steering cylinder on the other side is retracted. Under the drive of the front vertical steering cylinder, the saddle frame drives the main beam to rotate around its own axis.

[0034] Furthermore, the shotcrete support excavation mode also includes mode two direction adjustment control, and mode two direction adjustment control includes mode two up and down direction adjustment. During mode two up and down direction adjustment, the rear vertical direction adjustment cylinder is controlled to extend or retract, and the rear support sliding frame drives the main beam to swing up and down under the drive of the rear vertical direction adjustment cylinder.

[0035] Furthermore, the mode two steering control includes mode two left and right steering. During mode two left and right steering, the double-acting cylinder is controlled to extend and retract to the left or right, and the rear supporting sliding frame drives the main beam to swing left and right under the drive of the double-acting cylinder.

[0036] Furthermore, the mode two steering control includes mode two rotation steering. During mode two rotation steering, the rear vertical steering cylinder on one side is controlled to extend and the rear vertical steering cylinder on the other side is retracted. Under the drive of the rear vertical steering cylinder, the rear support sliding frame drives the main beam to rotate around its own axis.

[0037] Furthermore, in the shotcrete support excavation mode, the shield propulsion cylinder, saddle frame cylinder and rear support sliding cylinder are controlled to be in a fully retracted and locked state, and the rear vertical adjustment cylinder and double-acting cylinder are controlled to be in a set middle position and locked state.

[0038] Furthermore, in the segment support excavation mode, the main beam propulsion cylinder is controlled to be in a fully retracted and locked state, and the support shoe cylinder and the front vertical adjustment cylinder are controlled to be in a set middle position and locked state.

[0039] The present invention can switch between the shotcrete support excavation mode and the segment support excavation mode. Under stable geological conditions, the shotcrete support excavation mode is adopted to achieve support while excavating and reduce construction costs. Under fault fracture zone geological conditions, the segment support excavation mode is adopted to reduce the workload of slag removal and support, and still achieve efficient TBM excavation. Under rock burst geological conditions, the segment support excavation mode is adopted, and the segments play a protective role for personnel and equipment, reducing the losses caused by rock bursts. When excavating under large deformation geological conditions, the risk of the shield body being stuck can be greatly reduced because the TBM shield body is short and retractable. The present invention has outstanding comprehensive advantages in geological adaptability, excavation efficiency, and construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0041] Figure 1 It is a side view structural schematic diagram of the excavation stage in the shotcrete support excavation mode of the present invention;

[0042] Figure 2 for Figure 1 Middle AA view;

[0043] Figure 3 for Figure 1 Middle BB view;

[0044] Figure 4 for Figure 2 Middle CC view

[0045] Figure 5 It is a side view structural schematic diagram of the step-changing and support stages in the shotcrete support excavation mode of the present invention;

[0046] Figure 6 for Figure 5 Middle DD view;

[0047] Figure 7 for Figure 5Middle EE view;

[0048] Figure 8 for Figure 7 Middle FF view;

[0049] Fig. 9 It is a side view structural schematic diagram of the excavation stage in the segment support excavation mode of the present invention;

[0050] Fig.10 for Fig. 9 Middle GG view;

[0051] Fig.11 for Fig. 9 Middle HH view;

[0052] Fig.12 It is a side view structural schematic diagram of the step-changing and support stages in the segment support excavation mode of the present invention;

[0053] Fig.13 for Fig.12 Middle II direction view;

[0054] Fig.14 for Fig.12 Middle JJ view;

[0055] Fig.15 for Figure 1 Center KK view. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] Example 1, a dual-structure TBM, such as Figure 1 , Fig.15 As shown, the shield 1 includes a shield body propulsion cylinder 3-2 which is arranged in the circumferential direction of the shield 1. The shield body propulsion cylinder 3-2 provides a reaction force in the segment support excavation mode, and gradually propels the shield body 1 forward during the cyclic extension and retraction of the shield body propulsion cylinder 3-2. The shield 1 is connected to a main drive 1-2 through a shield body cylinder 1-4, the front of the main drive 1-2 is connected to a cutterhead 1-3, and the rear of the main drive is connected to a main beam 1-1. When the shield body propulsion cylinder 3-2 drives the shield body 1 forward, the main drive 1-2, the cutterhead 1-3 and the main beam 1-1 are driven forward synchronously.

[0058] The shield 1 includes an upper shield 1-6 and a lower shield 1-7, a left shield 1-8 and a right shield 1-9 that are symmetrical on both sides. A connecting shield 1-10 is provided between the upper shield 1-6 and the left shield 1-8 and the right shield 1-9, and between the lower shield 1-7 and the left shield 1-8 and the right shield 1-9. One end of the connecting shield 1-10 is hinged to the upper shield 1-6 or the lower shield 1-7, and the other end is plugged into the left shield 1-8 or the right shield 1-9. The shield body cylinder 1-4 is provided between the main drive 1-2 and the upper shield 1-6, the left shield 1-8 and the right shield 1-9, and the shield body propulsion cylinder 3-2 is provided on the upper shield 1-6, the lower shield 1-7, the left shield 1-8 and the right shield 1-9, respectively. The shield cylinders 1-4 can be extended and retracted according to the excavation conditions, thereby adjusting the shape of the shield 1, avoiding the risk of shield jamming and improving traffic performance.

[0059] The main beam 1-1 is provided with a shotcrete support excavation unit 2 and a segment support excavation unit 3, which can be easily converted to each other to adapt to complex and changeable geological excavation. Under stable geological conditions, the shotcrete support excavation unit 2 is adopted to achieve support while excavating and reduce construction costs. Under fault fracture zone geological conditions, the segment support excavation unit 3 is adopted to reduce the workload of slag cleaning and support, and still achieve efficient TBM excavation. Under rock burst geological conditions, the segment support excavation unit 3 is adopted, and the segments play a protective role for personnel and equipment, reducing the losses caused by rock bursts.

[0060] The sprayed anchor support excavation unit 2 includes a steel arch frame assembler 2-1, an anchor drilling machine 2-2 and a concrete spraying manipulator 2-3. The steel arch frame assembler 2-1, the anchor drilling machine 2-2 and the concrete spraying manipulator 2-3 can respectively perform steel arch frame assembly, anchor support and concrete spraying support. A main beam propulsion cylinder 2-4 is arranged behind the anchor drilling machine 2-2. The front end of the main beam propulsion cylinder 2-4 is hinged on the main beam 1-1, and the rear end is hinged with a support shoe unit 4. The support shoe unit 4 is slidably arranged along the axis of the main beam 1-1. The support shoe unit 4 can cooperate with the steel arch frame assembler 2-1, the anchor drilling machine 2-2 and the concrete spraying manipulator 2-3 to perform sprayed anchor support excavation. A rear support unit 5 is slidably arranged on the main beam 1-1 behind the support shoe unit 4. When the support shoe unit 4 changes steps, the rear support unit 5 can be used to support the main beam 1-1.

[0061] The segment support excavation unit 3 includes a segment assembly machine 3-1 and a shield propulsion cylinder 3-2, and the segment assembly machine 3-1 includes a segment grabbing head 3-3. When the shield propulsion cylinder 3-2 is changing steps and excavating, the rear support unit 5 can be used to support the main beam 1-1, and when the rear support unit 5 and the shield propulsion cylinder 3-2 are changing steps, the support shoe unit 4 can be used to support the main beam.

[0062] The segment assembler 3-1, the steel arch assembler 2-1, the anchor drill 2-2 and the concrete spraying manipulator 2-3 are all arranged behind the shield 1, which cleverly avoids the interference of the shield 1 with the support devices such as the segment assembler 3-1, the steel arch assembler 2-1, the anchor drill 2-2 and the concrete spraying manipulator 2-3, so that the present embodiment can conveniently switch between the two excavation modes. When switching between the two excavation modes, not only will they not affect each other, but they can also assist each other in changing steps. In addition, when excavating under large deformation geological conditions, since the shield 1 is short in length and the support shoe unit 4 and the rear support unit 5 on the main beam 1-1 are both retractable, the risk of the shield body being stuck can be greatly reduced.

[0063] Embodiment 2, a dual-structure TBM, the segment assembly machine 3-1 and the steel arch assembly machine 2-1 are designed as one body, making the whole device more compact and saving installation and operation space. The segment assembly machine 3-1 is arranged in front of the anchor drilling machine 2-2, effectively ensuring the convenience of segment support.

[0064] The other structures of this embodiment are the same as those of Embodiment 1.

[0065] Example 3, a dual-structure TBM, such as Figure 1 , Figure 2 As shown, the shoe support unit 4 includes a saddle frame 4-1 slidably mounted on the main beam 1-1, a saddle frame cylinder 4-2 is provided at the bottom end of the saddle frame 4-1, and a saddle frame shoe plate 4-3 is provided at the bottom end of the saddle frame cylinder 4-2. The saddle frame cylinder 4-2 can drive the saddle frame shoe plate 4-3 to extend and retract, thereby meeting the support of the saddle frame 4-1 to the main beam 1-1, and also facilitating the switching of steps and excavation modes. The left and right sides of the saddle frame 4-1 are respectively connected with a left shoe support cylinder 4-4 and a right shoe support cylinder 4-5, and the outer ends of the left shoe support cylinder 4-4 and the right shoe support cylinder 4-5 are both hinged with shoe supports 4-6, which can tighten the tunnel wall driven by the shoe support cylinders on both sides, and provide a reaction force for the shield body 1 to move forward for the spray anchor support excavation unit.

[0066] The other structures of this embodiment are the same as those of Embodiment 1 or 2.

[0067] Example 4, a dual-structure TBM, such as Figure 1 , Figure 2 As shown, it includes a left saddle plate 4-11 and a right saddle plate 4-12, and the bottom ends of the left saddle plate 4-11 and the right saddle plate 4-12 are both provided with a saddle frame cylinder 4-2, and the left saddle plate 4-11 and the right saddle plate 4-12 are connected by an upper crossbeam 4-13 and a lower crossbeam 4-14. The main beam 1-1 is inserted between the left saddle plate 4-11, the right saddle plate 4-12, the upper crossbeam 4-13 and the lower crossbeam 4-14, and the saddle frame 4-1 can slide relative to the main beam 1-1 and can support the main beam 1-1 at the same time.

[0068] The upper cross beam 4-13 includes a front upper cross beam 4-131 and a rear upper cross beam 4-132 connected to the front sides of the left saddle plate 4-11 and the right saddle plate 4-12. The lower cross beam 4-14 includes a front lower cross beam 4-141 and a rear lower cross beam connected to the rear sides of the left saddle plate 4-11 and the right saddle plate 4-12. The left support shoe cylinder 4-4 and the right support shoe cylinder 4-5 are arranged between the front upper cross beam 4-131 and the rear upper cross beam 4-132, which can ensure that the support shoe cylinder will not interfere with the saddle frame 4-1, save internal installation space, and ensure the stability of operation.

[0069] The other structures of this embodiment are the same as those of Embodiment 1, 2 or 3.

[0070] Example 5, a dual-structure TBM, such as Figure 4 As shown, the left support shoe cylinder 4-4 and the right support shoe cylinder 4-5 both include an upper support shoe cylinder 4-51 and a lower support shoe cylinder 4-52 corresponding to each other. The two upper support shoe cylinders 4-51 are fixedly connected by a connecting shaft 4-53. The connecting shaft 4-53 is provided with a mounting groove 4-7 and a vertical hole 4-71 passing through the mounting groove 4-7. A horizontal axis 4-72 is movably arranged in the mounting groove 4-7. The size of the mounting groove 4-7 is larger than the size of the horizontal axis 4-72, so that the support shoe 4-6 and the saddle frame 4-1 can move relative to each other, thereby adjusting the direction of the main beam 1-1. The front end of the horizontal axis 4-72 is connected to the front upper crossbeam 4-131, and the rear end is connected to the rear upper crossbeam 4-132. A saddle frame vertical axis 4-73 is arranged in the vertical hole 4-71. The saddle frame vertical axis 4-73 passes through the horizontal axis 4-72 and is hingedly connected to the horizontal axis 4-72.

[0071] The other structures of this embodiment are the same as those of Embodiment 4.

[0072] Example 6, a dual-structure TBM, such as Figure 2 As shown, a left-right symmetrical front vertical adjustment cylinder 4-8 is arranged between the saddle frame 4-1 and the gripper cylinder, one end of the two front vertical adjustment cylinders 4-8 is hinged to the left saddle plate 4-11 or the right saddle plate 4-12, and the other end is hinged to the gripper cylinder. The hinged connection method allows the gripper 4-6 to rotate relative to the saddle frame 4-1 at the hinge. Driven by the front vertical adjustment cylinder 4-8, the main beam 1-1 can swing up and down, swing left and right, and rotate circumferentially.

[0073] The other structures of this embodiment are the same as those of Embodiment 5.

[0074] Example 7, a dual-structure TBM, such as Figure 3As shown, the rear support unit 5 includes a rear support sliding frame 5-1 slidably mounted on the main beam 1-1, and rear vertical adjustment cylinders 5-2 are arranged on both sides of the rear support sliding frame 5-1. The upper end of the rear vertical adjustment cylinder 5-2 is hinged to the rear support sliding frame 5-1, and a left-right symmetrical front vertical adjustment cylinder 4-8 is arranged between the saddle frame 4-1 and the shoe cylinder. One end of the two front vertical adjustment cylinders 4-8 is hinged to the left saddle plate 4-11 or the right saddle plate 4-12, and the other end is hinged to the shoe cylinder. Driven by the rear vertical adjustment cylinder 5-2, the rear support sliding frame 5-1 can be driven to rise, fall and rotate, thereby driving the main beam 1-1 to make corresponding adjustments.

[0075] The rear support 5-8 is an inverted U-shaped box, and the rear support oil cylinder 5-4 is arranged in the left and right side chambers of the rear support 5-8. The upper end of the rear support oil cylinder 5-4 is hinged to the rear support 5-8, and the lower end is hinged to the rear support shoe plate 5-3.

[0076] The other structures of this embodiment may be the same as any one of Embodiments 1-6.

[0077] Example 8, a dual-structure TBM, such as Figure 1 , Figure 7 and Figure 8 As shown, a double-acting oil cylinder 5-5 is arranged in the horizontal cavity connecting the left and right side cavities on the rear support 5-8, and a mounting port is opened in the horizontal cavity. A vertical shaft 5-7 is arranged through the mounting port for the double-acting oil cylinder 5-5, and the vertical shaft 5-7 is hinged on the rear support sliding frame 5-1. Both ends of the double-acting oil cylinder 5-5 are hinged on the rear support 5-8. The double-acting oil cylinder 5-5 can drive the rear support sliding frame 5-1 to move left and right, and can also cooperate with the rear vertical adjustment oil cylinder 5-2 to drive the rear support sliding frame 5-1 to rotate, thereby driving the main beam 1-1 to rotate.

[0078] The other structures of this embodiment are the same as those of Embodiment 7.

[0079] Example 9, a dual-structure TBM, such as Figure 1 As shown, a rear support sliding cylinder 5-6 is arranged between the rear support sliding frame 5-1 and the main beam 1-1, and the rear support sliding cylinder 5-6 is arranged along the axis of the main beam 1-1, and one end of the rear support sliding cylinder 5-6 is hinged on the main beam 1-1, and the other end is hinged on the rear support sliding frame 5-1. The rear support sliding cylinder 5-6 can drive the rear support unit 5 to slide along the main beam 1-1, thereby meeting the need for step-change support during excavation.

[0080] The other structures of this embodiment are the same as those of Embodiment 7 or 8.

[0081] Embodiment 10, a construction method of a dual-structure TBM, including a shotcrete support excavation mode and a segment support excavation mode, wherein the shotcrete support excavation mode includes the following steps:

[0082] Step 1: Excavation, such as Figure 1 and Figure 2 As shown, the control shoe cylinder extends, and the shoe 4-6 holds the tunnel wall tightly to provide the TBM with a reaction force for forward excavation. Figure 1 and Figure 3 As shown, the rear support cylinder 5-4 is controlled to retract, the rear support shoe plate 5-3 leaves the tunnel wall, the main beam propulsion cylinder 2-4 is controlled to extend, and the main beam 1-1 drives the cutter head 1-3 to dig forward.

[0083] Step 2: Support. During the excavation process in step 1, the steel arch frame assembler 2-1 is controlled to assemble the steel arch frame, the anchor drill 2-2 is controlled to perform anchor support, and the concrete spraying manipulator 2-3 is controlled to perform concrete spraying support;

[0084] Step 3: Change step, such as Figure 5 , Figure 7 As shown, when the main beam propulsion cylinder 2-4 in step 1 reaches the end of the extension stroke, the rear support cylinder 5-4 in step 1 is controlled to extend, and the rear support shoe plate 5-3 holds the tunnel wall tightly. Figure 6 As shown, the support shoe cylinder in step one is controlled to retract, the support shoe 4-6 leaves the tunnel wall, the main beam propulsion cylinder 2-4 reaching the end of the extension stroke is controlled to retract to the end of the retraction stroke, and the main beam propulsion cylinder 2-4 drives the saddle frame 4-1 to slide forward along the main beam 1-1 to the next tightening position.

[0085] Step 4: Repeat steps 1, 2 and 3 in sequence.

[0086] The segment support excavation mode comprises the following steps:

[0087] Step 5: Excavation, such as Fig. 9 , Fig.11 As shown, the rear support cylinder 5-4 is controlled to extend, and the rear support cylinder 5-4 drives the rear support shoe plate 5-3 to hold the tunnel wall tightly. Fig.10 As shown, the saddle frame cylinder 4-2 is controlled to be retracted, and the saddle frame cylinder 4-2 drives the saddle frame shoe plate 4-3 to leave the tunnel wall, and the shoe cylinder is controlled to be retracted, and the shoe cylinder drives the shoe 4-6 to leave the tunnel wall, and the shield body propulsion cylinder 3-2 and the rear support sliding cylinder 5-6 are synchronously controlled to extend. The shield body propulsion cylinder 3-2 presses on the rear segment to provide a reaction force for the TBM to advance forward, and at the same time, the main beam 1-1 moves forward relative to the rear support sliding frame 5-1, and the cutter head 1-3 synchronously advances forward.

[0088] Step 6: Support, such as Fig.12 , Fig.14As shown, when the shield body propulsion cylinder 3-2 in step 4 reaches the end of the extension stroke, the shield body propulsion cylinder 3-2 in step 5 is controlled to be retracted, and the segment assembling machine 2-1 is controlled to assemble the segments at the position before the shield body propulsion cylinder 3-2 is retracted;

[0089] Step 7, change steps, such as Fig.12 , Fig.13 As shown, the saddle frame oil cylinder 4-2 in the control step 4 extends, and the saddle frame oil cylinder 4-2 drives the saddle frame shoe plate 4-3 to support on the tunnel wall. Fig.12 , Fig.14 As shown, the rear support cylinder 5-4 in step 4 is controlled to be retracted, and the rear support cylinder 5-4 drives the rear support shoe plate 5-3 to leave the tunnel wall. The rear support sliding cylinder 5-6 is controlled to be retracted, and the rear support sliding cylinder 5-6 drives the rear support unit 5 to slide forward along the main beam 1-1 to the next support position;

[0090] Step 8: Repeat steps 5, 6, and 7 in sequence.

[0091] The structure of this embodiment is the same as that of Embodiment 9.

[0092] Embodiment 11, a construction method of a dual-structure TBM, the sprayed anchor support excavation mode also includes a mode one direction adjustment control, the mode one direction adjustment control includes a mode one up and down direction adjustment, when the mode one up and down direction adjustment is performed, the front vertical direction adjustment cylinder 4-8 is controlled to extend or retract, and the front vertical direction adjustment cylinder 4-8 drives the main beam to swing up and down.

[0093] The other method steps of this embodiment are the same as those of Embodiment 10.

[0094] Embodiment 12, a construction method of a dual-structure TBM, the mode one direction control includes mode one left and right direction control, during mode one left and right direction control, the left support shoe cylinder 4-4 is controlled to extend and the right support shoe cylinder 4-5 is controlled to retract at the same time, or the left support shoe cylinder 4-4 is controlled to retract and the right support shoe cylinder 4-5 is controlled to extend at the same time, the left support shoe cylinder 4-4 and the right support shoe cylinder 4-5 drive the main beam 1-1 to swing left and right.

[0095] The other method steps of this embodiment are the same as those of Embodiment 10 or 11.

[0096] Example 13, a construction method of a dual-structure TBM, the mode one steering control includes mode one rotation steering, during mode one rotation steering, the front vertical steering cylinder 4-8 on one side is controlled to extend and the front vertical steering cylinder 4-8 on the other side is retracted, and the saddle frame 4-1 drives the main beam 1-1 to rotate around its own axis under the drive of the front vertical steering cylinder 4-8.

[0097] The other method steps of this embodiment are the same as those of Embodiment 10, 11 or 12.

[0098] Example 14, a construction method of a dual-structure TBM, the sprayed anchor support excavation mode also includes a mode two direction adjustment control, the mode two direction adjustment control includes a mode two up and down direction adjustment, when the mode two up and down direction adjustment is performed, the rear vertical direction adjustment cylinder 5-2 is controlled to extend or retract, and the rear support sliding frame 5-1 drives the main beam 1-1 to swing up and down under the drive of the rear vertical direction adjustment cylinder 5-2.

[0099] The other method steps of this embodiment are the same as those of Embodiment 10, 11, 12 or 13.

[0100] Example 15, a construction method of a dual-structure TBM, the mode two direction adjustment control includes mode two left and right direction adjustment, when mode two left and right direction adjustment, the double-acting cylinder 5-5 is controlled to extend and retract to the left or right, and under the drive of the double-acting cylinder 5-5, the rear support sliding frame 1-1 drives the main beam 1-1 to swing left and right.

[0101] The other method steps of this embodiment may be the same as any one of Embodiments 10-14.

[0102] Example 16, a construction method for a dual-structure TBM, the mode two steering control includes mode two rotation steering, during mode two rotation steering, the rear vertical steering cylinder 5-2 on one side is controlled to extend and the rear vertical steering cylinder 5-2 on the other side is retracted, and under the drive of the rear vertical steering cylinder 5-2, the rear support sliding frame 5-1 drives the main beam 1-1 to rotate around its own axis.

[0103] The other method steps of this embodiment may be the same as any one of Embodiments 10-15.

[0104] Example 17, a construction method for a dual-structure TBM, in the shotcrete support excavation mode, the shield propulsion cylinder 3-2, the saddle frame cylinder 4-2 and the rear support sliding cylinder 5-6 are controlled to be in a fully retracted and locked state, and the rear vertical adjustment cylinder 5-2 and the double-acting oil cylinder 5-5 are controlled to be in a set middle position and locked state.

[0105] The other method steps of this embodiment may be the same as any one of Embodiments 10-16.

[0106] Example 18, a construction method of a dual-structure TBM, in the segment support excavation mode, the main beam propulsion cylinder 3-2 is controlled to be in a fully retracted and locked state, and the support shoe cylinder and the front vertical adjustment cylinder 4-8 are controlled to be in a set middle position and locked state.

[0107] The other method steps of this embodiment may be the same as any one of Embodiments 10-17.

[0108] The details not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-structure TBM, comprising a shield (1), wherein a shield propulsion cylinder (3-2) is arranged in the circumferential direction of the shield (1), a main drive (1-2) is connected to the shield (1) via a shield cylinder (1-4), a cutterhead (1-3) is connected to the front of the main drive (1-2), and a main beam (1-1) is connected to the rear of the main drive (1-2), characterized in that: The main beam (1-1) is provided with a sprayed anchor support excavation unit and a segment support excavation unit. The sprayed anchor support excavation unit comprises a steel arch frame assembly machine (2-1), an anchor drilling machine (2-2) and a concrete spraying manipulator (2-3). A main beam propulsion cylinder (2-4) is arranged behind the anchor drilling machine (2-2). The front end of the main beam propulsion cylinder (2-4) is hinged on the main beam (1-1), and the rear end is hinged with a support shoe unit (4). The support shoe unit (4) is slidably arranged along the axis of the main beam (1-1). A rear support unit (5) is slidably arranged on the main beam (1-1) behind the support shoe unit (4). The segment support excavation unit comprises a segment assembly machine (3-1). The segment assembly machine (3-1), the steel arch frame assembly machine (2-1), the anchor drilling machine (2-2) and the concrete spraying manipulator (2-3) are all arranged behind the shield (1); The shield (1) comprises an upper shield (1-6) and a lower shield (1-7), and a left shield (1-8) and a right shield (1-9) that are symmetrical on both sides. A connecting shield (1-10) is provided between the upper shield (1-6) and the left shield (1-8) and the right shield (1-9), and between the lower shield (1-7) and the left shield (1-8) and the right shield (1-9). One end of the connecting shield (1-10) is hinged to the upper shield (1-6) or the lower shield (1-7), and the other end is plugged into and matched with the left shield (1-8) or the right shield (1-9). The shoe support unit (4) comprises a saddle frame (4-1) slidably sleeved on the main beam, a saddle frame oil cylinder (4-2) is arranged at the bottom end of the saddle frame (4-1), a saddle frame shoe plate (4-3) is arranged at the bottom end of the saddle frame oil cylinder (4-2), a left shoe support cylinder (4-4) and a right shoe support cylinder (4-5) are respectively connected to the left and right sides of the saddle frame (4-1), and the outer ends of the left shoe support cylinder (4-4) and the right shoe support cylinder (4-5) are both hingedly connected with shoe support (4-6); The saddle frame (4-1) comprises a left saddle plate (4-11) and a right saddle plate (4-12), the bottom ends of the left saddle plate (4-11) and the right saddle plate (4-12) are both provided with a saddle frame oil cylinder (4-2), the left saddle plate (4-11) and the right saddle plate (4-12) are connected via an upper crossbeam (4-13) and a lower crossbeam (4-14), and the main beam (1-1) is inserted between the left saddle plate (4-11), the right saddle plate (4-12), the upper crossbeam (4-13) and the lower crossbeam (4-14).

2. The dual-structure TBM according to claim 1, characterized in that: The shield body oil cylinder (1-4) is arranged between the main drive (1-2) and the upper shield (1-6), the left shield (1-8) and the right shield (1-9), and the shield body propulsion oil cylinder (3-2) is respectively arranged on the upper shield (1-6), the lower shield (1-7), the left shield (1-8) and the right shield (1-9).

3. The dual-structure TBM according to claim 1, characterized in that: The segment assembly machine (3-1) and the steel arch assembly machine (2-1) are designed as an integrated whole, and the segment assembly machine (3-1) is arranged in front of the anchor drilling machine (2-2).

4. The dual-structure TBM according to any one of claims 1 to 3, characterized in that: The upper crossbeam (4-13) comprises a front upper crossbeam (4-131) and a rear upper crossbeam (4-132) connected to the front sides of the left saddle plate (4-11) and the right saddle plate (4-12); the lower crossbeam (4-14) comprises a front lower crossbeam (4-141) and a rear lower crossbeam connected to the rear sides of the left saddle plate (4-11) and the right saddle plate (4-12); the left support shoe cylinder (4-4) and the right support shoe cylinder (4-5) are arranged between the front upper crossbeam (4-131) and the rear upper crossbeam (4-132).

5. The dual-structure TBM according to claim 4, characterized in that: The left support shoe cylinder (4-4) and the right support shoe cylinder (4-5) both comprise an upper support shoe cylinder (4-51) and a lower support shoe cylinder (4-52) corresponding to each other. The two upper support shoe cylinders (4-51) are fixedly connected via a connecting shaft (4-53). The connecting shaft (4-53) is provided with a mounting groove (4-7) and a vertical hole (4-71) passing through the mounting groove (4-7). A horizontal shaft (4-72) is movably arranged in the mounting groove (4-7). The size of the mounting groove (4-7) is larger than the size of the horizontal shaft (4-72). The front end of the horizontal shaft (4-72) is connected to the front upper cross beam (4-131) and the rear end is connected to the rear upper cross beam (4-132). A saddle frame vertical shaft (4-73) is arranged in the vertical hole (4-71). The saddle frame vertical shaft (4-73) passes through the horizontal shaft (4-72) and is hingedly connected to the horizontal shaft (4-72).

6. The dual-structure TBM according to any one of claims 1 to 3 and 5, characterized in that: Left-right symmetrical front vertical adjustment cylinders (4-8) are arranged between the saddle frame (4-1) and the gripper cylinder. One end of the two front vertical adjustment cylinders (4-8) is hinged to the left saddle plate (4-11) or the right saddle plate (4-12), and the other end is hinged to the gripper cylinder.

7. The dual-structure TBM according to any one of claims 1 to 3 and 5, characterized in that: The rear support unit (5) comprises a rear support sliding frame (5-1) slidably mounted on the main beam (1-1), and rear vertical adjustment cylinders (5-2) are arranged on both sides of the rear support sliding frame (5-1). The upper end of the rear vertical adjustment cylinder (5-2) is hinged to the rear support sliding frame (5-1), and the lower end is hinged to the rear support (5-8).

8. The dual-structure TBM according to claim 7, characterized in that: The rear support (5-8) is an inverted U-shaped box body, and a rear support oil cylinder (5-4) is arranged in the left and right side cavities of the rear support (5-8). The upper end of the rear support oil cylinder (5-4) is hinged to the rear support (5-8), and the lower end is hinged to the rear support boot plate (5-3).

9. The dual-structure TBM according to claim 8, characterized in that: A double-acting oil cylinder (5-5) is arranged in a horizontal cavity connected to the left and right side cavities on the rear support (5-8), and a mounting opening is provided in the horizontal cavity. The shell of the double-acting oil cylinder (5-5) is hinged to the rear support sliding frame (5-1) through the mounting opening, and both ends of the double-acting oil cylinder (5-5) are connected to the rear support (5-8).

10. The dual-structure TBM according to claim 8 or 9, characterized in that: A rear support sliding oil cylinder (5-6) is arranged between the rear support sliding frame (5-1) and the main beam (1-1); the rear support sliding oil cylinder (5-6) is arranged along the axis of the main beam (1-1); one end of the rear support sliding oil cylinder (5-6) is hinged to the main beam (1-1), and the other end is hinged to the rear support sliding frame (5-1).

11. The construction method of the dual-structure TBM according to any one of claims 1 to 10, characterized in that: It includes shotcrete support excavation mode and segment support excavation mode. The shotcrete support excavation mode includes the following steps: Step 1: Excavation, control the support shoe cylinder to extend, the support shoe holds the tunnel wall tightly to provide reaction force for the TBM to advance forward, control the rear support cylinder to retract, the rear support shoe plate leaves the tunnel wall, control the main beam propulsion cylinder to extend, and the main beam drives the cutterhead to advance forward; Step 2: Support. During the excavation process in step 1, the steel arch frame assembly machine is controlled to assemble the steel arch frame, the anchor drilling machine is controlled to perform anchor support, and the concrete spraying manipulator is controlled to perform concrete spraying support; Step 3: Change the step. When the main beam propulsion cylinder in step 1 reaches the end of the extension stroke, the rear support cylinder in step 1 is controlled to extend, and the rear support shoe plate holds the tunnel wall tightly. The support shoe cylinder in step 1 is controlled to retract, and the support shoe leaves the tunnel wall. The main beam propulsion cylinder that has reached the end of the extension stroke is controlled to retract to the end of the retraction stroke. The main beam propulsion cylinder drives the saddle frame to slide forward along the main beam to the next holding position. Step 4: Repeat steps 1, 2 and 3 in sequence; The segment support excavation mode comprises the following steps: Step 5: Excavation, control the rear support cylinder to extend, the rear support cylinder drives the rear support shoe plate to hold the tunnel wall tightly, control the saddle frame cylinder to retract, the saddle frame cylinder drives the saddle frame shoe plate to leave the tunnel wall, control the shoe cylinder to retract, the shoe cylinder drives the shoe to leave the tunnel wall, synchronously control the shield propulsion cylinder and the rear support sliding cylinder to extend, the shield propulsion cylinder presses on the rear segment to provide reaction force for the TBM to advance forward, and at the same time the main beam moves forward relative to the rear support sliding frame, and the cutterhead excavates forward synchronously; Step six, support, when the shield body propulsion cylinder in step four reaches the end of the extension stroke, the shield body propulsion cylinder in step five is controlled to be retracted, and the segment assembling machine is controlled to assemble the segments at the position before the shield body propulsion cylinder is retracted; Step 7, change the step, control the saddle frame cylinder in step 4 to extend, the saddle frame cylinder drives the saddle frame boot plate to support on the tunnel wall, control the shield body propulsion cylinder in step 5 to retract, the rear support cylinder drives the rear support boot plate to leave the tunnel wall, control the rear support sliding cylinder to retract, and the rear support sliding cylinder drives the rear support unit to slide forward along the main beam to the next support position; Step 8: Repeat steps 5, 6, and 7 in sequence.

12. The construction method of the dual-structure TBM according to claim 11, characterized in that: The sprayed anchor support excavation mode also includes mode one direction adjustment control, and the mode one direction adjustment control includes mode one up and down direction adjustment. During mode one up and down direction adjustment, the front vertical direction adjustment cylinder is controlled to extend or retract, and the front vertical direction adjustment cylinder drives the main beam to swing up and down.

13. The construction method of the dual-structure TBM according to claim 11 or 12, characterized in that: The mode one steering control includes mode one left and right steering. During mode one left and right steering, the left support shoe cylinder is controlled to extend and the right support shoe cylinder is controlled to retract at the same time, or the left support shoe cylinder is controlled to retract and the right support shoe cylinder is controlled to extend at the same time. The left support shoe cylinder and the right support shoe cylinder drive the main beam to swing left and right.

14. The construction method of the dual-structure TBM according to claim 13, characterized in that: The mode one steering control includes mode one rotation steering. During mode one rotation steering, the front vertical steering cylinder on one side is controlled to extend and the front vertical steering cylinder on the other side is controlled to retract. Under the drive of the front vertical steering cylinder, the saddle frame drives the main beam to rotate around its own axis.

15. The construction method of the dual-structure TBM according to any one of claims 11, 12 or 14, characterized in that: The sprayed anchor support excavation mode also includes mode two direction adjustment control, which includes mode two up and down direction adjustment. During mode two up and down direction adjustment, the rear vertical direction adjustment cylinder is controlled to extend or retract, and the rear support sliding frame drives the main beam to swing up and down under the drive of the rear vertical direction adjustment cylinder.

16. The construction method of the dual-structure TBM according to claim 15, characterized in that: The mode two steering control includes mode two left and right steering. When mode two left and right steering is performed, the double-acting cylinder is controlled to extend and retract to the left or right, and the rear support sliding frame drives the main beam to swing left and right under the drive of the double-acting cylinder.

17. The construction method of the dual-structure TBM according to claim 16, characterized in that: The mode two steering control includes mode two rotation steering. During mode two rotation steering, the rear vertical steering cylinder on one side is controlled to extend and the rear vertical steering cylinder on the other side is retracted. Under the drive of the rear vertical steering cylinder, the rear support sliding frame drives the main beam to rotate around its own axis.

18. The construction method of the dual-structure TBM according to claim 16 or 17, characterized in that: In the shotcrete support excavation mode, the shield propulsion cylinder, saddle frame cylinder and rear support sliding cylinder are controlled to be in a fully retracted and locked state, and the rear vertical adjustment cylinder and double-acting cylinder are controlled to be in a set middle position and locked state.

19. The construction method of the dual-structure TBM according to any one of claims 11, 12, 14, 16 or 17, characterized in that: In the segment support excavation mode, the main beam propulsion cylinder is controlled to be in a fully retracted and locked state, and the support shoe cylinder and the front vertical adjustment cylinder are controlled to be in a set middle position and locked state.

Images