A rectangular shaft heading machine

Abstract

The application provides a rectangular shaft tunneling machine, and belongs to the technical field of tunnel engineering construction; the rectangular shaft tunneling machine comprises a shield body, a first supporting shoe device, a second supporting shoe device, a rotating device and an excavation device which are arranged on the shield body; the rotating device is connected with the shield body and the excavation device, and is used for driving the excavation device to rotate; and the excavation device is used for excavating soil layers. The first supporting shoe device and the second supporting shoe device are arranged on different end surfaces of the shield body, so that the rectangular shaft tunneling machine can simultaneously adhere to the hole wall through the first supporting shoe device and the second supporting shoe device when tunneling, thereby providing sufficient supporting force for the rectangular shaft tunneling machine and preventing the rectangular shaft tunneling machine from sinking due to gravity; meanwhile, the rotating device is arranged to drive the excavation device to rotate by 360 degrees, so that the rectangular hole wall can be excavated at different positions.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel engineering construction, and relates to a rectangular shaft tunneling machine. BACKGROUND

[0002] With the acceleration of urbanization and the requirements of some engineering projects, the demand for shafts is increasing. At present, shaft excavation mainly adopts the drilling and blasting method, which faces many problems in the aspects of environment, safety, construction period, etc. Moreover, the shafts excavated by machines are mainly circular, but in the fields of anti-slide piles, underground garages and other underground spaces, the space utilization rate of rectangular shafts is higher than that of circular shafts, the bending section modulus of the same area of a rectangular section is larger than that of a circular section, and the application range of rectangular shafts is wider than that of circular shafts. However, the existing circular shaft tunneling equipment cannot be applied to the excavation of rectangular sections. How to provide a shaft tunneling machine with high mechanization degree, safe operation and low environmental impact is a problem that needs to be solved by the technical personnel in the field.

[0003] To solve the above technical problems, the technical personnel in the field have proposed a solution. Patent No. CN114033385A "Shaft tunneling machine and shaft tunneling method" proposes a shaft tunneling machine and a shaft tunneling method. To solve the technical problem that it is difficult to excavate a large-section shaft, the invention provides a shaft tunneling machine, which includes a frame body, an excavation unit, a supporting mechanism and a walking system. The excavation unit is installed on the walking system, the walking system is installed on the frame body, the walking system can drive the excavation unit to translate to excavate a shaft, and the supporting mechanism is connected with the frame body to support the frame body and provide excavation reaction force. The shaft tunneling machine has a complex structure, multiple excavation systems, and is prone to interference between the excavation systems during construction. The entire outer frame body cannot move longitudinally and transversely, and blind areas are easily caused when excavating the four corners of a rectangular shaft, thereby affecting the working efficiency of the shaft tunneling machine. SUMMARY

[0004] The present application provides a rectangular shaft tunneling machine, comprising a shield body and a first support shoe device, a second support shoe device, a rotating device and an excavation device arranged on the shield body.

[0005] The first support shoe device comprises a first support shoe, which is connected with the shield body through a first driving member. The first support shoe is driven by the first driving member to displace in the direction of approaching or moving away from the shield body.

[0006] The second support shoe device comprises a second support shoe, which is connected with the shield body through a third driving member. The second support shoe is driven by the third driving member to displace in the direction of approaching or moving away from the shield body.

[0007] The rotating device is connected with the shield and the excavating device, and is used for driving the excavating device to rotate.

[0008] The excavating device comprises a cutter head, which is used for excavating the soil layer.

[0009] Optionally, the first supporting shoe device further comprises a second driving member arranged obliquely, a driving end of the second driving member is hinged with the fixed end of the first driving member, and a fixed end of the second driving member is hinged with the shield, so as to drive the first driving member to extend or retract at an oblique angle of 30°-60° relative to the shield.

[0010] The second supporting shoe device further comprises a fourth driving member arranged obliquely, a driving end of the fourth driving member is hinged with the fixed end of the second driving member, and a fixed end of the fourth driving member is hinged with the shield, so as to drive the second driving member to extend or retract at an oblique angle of 30°-60° relative to the shield.

[0011] Optionally, a first ball head hinged structure is further arranged between the second driving member and the shield, a first ball head seat in the first ball head hinged structure is fixedly connected with the shield, and a first ball head in the first ball head hinged structure is fixedly connected with the driving end of the second driving member.

[0012] Optionally, the first supporting shoe device is provided with two groups of the first supporting shoe devices arranged symmetrically along the central axis of the shield, and each group of the first supporting shoe devices is provided with at least two members arranged side by side.

[0013] The second supporting shoe device is provided with two groups of the second supporting shoe devices arranged symmetrically along the central axis of the shield, and each group of the second supporting shoe devices is provided with at least two members arranged side by side.

[0014] The shield is used for arranging the end face of the first supporting shoe device to be perpendicular to the end face of the second supporting shoe device.

[0015] Optionally, the rotating device is further provided with an anti-twist assembly and an axial limiting hole.

[0016] The anti-twist assembly is used for limiting the torque generated by the rotating device during work.

[0017] The axial limiting hole is provided with at least one axial limiting hole arranged side by side with the second supporting shoe device, and a limiting device is arranged in each axial limiting hole, and the limiting device is used for limiting the axial movement of the rotating device.

[0018] Optionally, the limiting device comprises a fifth driving member and a limiting block, one end of the fifth driving member is fixedly connected with the shield, the other end of the fifth driving member is provided with the limiting block, and during the assembly of the whole machine of the shaft sinking machine, the fifth driving member of the limiting device drives the limiting block to extend into the axial limiting hole, so as to limit the axial movement of the rotating device.

[0019] Optionally, a third supporting shoe device is arranged in the slewing device.

[0020] The third supporting shoe device comprises a sixth driving member and a third supporting shoe. The fixed end of the sixth driving member is fixedly connected with the slewing device, and the driving end of the sixth driving member is hingedly connected with the third supporting shoe, and is used for driving the third supporting shoe to move in the direction of approaching or moving away from the slewing device.

[0021] Optionally, a second ball head hinged structure is arranged between the sixth driving member and the third supporting shoe. The second ball head seat in the second ball head hinged structure is fixedly connected with the third supporting shoe, and the second ball head in the second ball head hinged structure is fixedly connected with the driving end of the sixth driving member.

[0022] Optionally, the excavation device further comprises a telescopic arm and a swing oil cylinder. The telescopic arm is hingedly connected with the driving end of the slewing device, one end of the swing oil cylinder is hingedly connected with the slewing device, and the other end of the swing oil cylinder is hingedly connected with the telescopic arm. The swing oil cylinder is used for driving the telescopic arm to swing. The cutter head is mounted on the end of the telescopic arm away from the slewing device.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] The rectangular shaft tunneling machine provided by the present application can simultaneously adhere to the hole wall through the first supporting shoe device and the second supporting shoe device when tunneling, so as to provide sufficient supporting force for the rectangular shaft tunneling machine and prevent it from sinking due to gravity. Meanwhile, the excavation device is driven by the slewing device to perform 360-degree slewing movement, so as to realize excavation at different positions of the rectangular hole wall.

[0025] In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are presented by way of example or for purpose of illustration, and not as limitations of the present application. In the drawings:

[0027] Figure 1 is a structural schematic view of a rectangular shaft tunneling machine in an embodiment of the present application;

[0028] Figure 2 is Figure 1 is a schematic view of the A-A section in FIG. 4;

[0029] Figure 3 is Figure 1 is a schematic view of the B-B section in FIG. 4;

[0030] Figure 4 is a starting state diagram of a rectangular shaft tunneling machine in an embodiment of the present application;

[0031] Figure 5 is a diagram of a rectangular shaft tunneling machine in an embodiment of the present application when excavating a blind area;

[0032] Figure 6 is Figure 1 is a sectional view of a limiting device in the embodiment;

[0033] Figure 7 is Figure 1 is a diagram of a telescopic arm in a step-changing state in the embodiment;

[0034] Figure 8 is Figure 1 is a structural diagram of a third support shoe device in the embodiment.

[0035] wherein:

[0036] 1, shield body, 11, first oil cylinder seat, 12, second oil cylinder seat, 13, third oil cylinder seat, 14, fourth oil cylinder seat;

[0037] 2, first support shoe device, 21, first oil cylinder, 211, fifth oil cylinder seat, 22, second oil cylinder, 23, first support shoe;

[0038] 3, second support shoe device, 31, third oil cylinder, 311, sixth oil cylinder seat, 312, first ball head, 32, fourth oil cylinder, 33, second support shoe, 331, first ball head seat, 34, first gland;

[0039] 4, rotating device, 41, seventh oil cylinder seat, 42, eighth oil cylinder seat, 43, anti-twist assembly, 44, limiting hole;

[0040] 5, excavating device, 51, telescopic arm, 511, ninth oil cylinder seat, 52, swing oil cylinder, 53, cutter head;

[0041] 6, limiting device, 61, fifth oil cylinder, 62, limiting block;

[0042] 7, third support shoe device, 71, sixth oil cylinder, 711, second ball head, 72, second gland, 73, third support shoe, 731, second ball head seat. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more clear and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. It should be noted that the drawings of the present application are all simplified and use non-accurate proportions, and are only used to facilitate and clearly assist in describing the embodiments of the present application; the numbers mentioned in the present application are not limited to the specific numbers in the examples of the drawings; the directions or position relationships mentioned in the present application, such as 'front','middle','rear', 'left', 'right', 'top', 'bottom', 'top', 'bottom','middle', etc., are all based on the directions or position relationships shown in the drawings of the present application, and do not indicate or imply that the devices or parts referred to must have a specific direction, nor can it be understood as a limitation on the present application.

[0044] Embodiment:

[0045] Referring to Figures 1 to 8 As shown in the drawings, the rectangular shaft tunneling machine provided by the present application comprises a shield body 1, a first support shoe device 2, a second support shoe device 3, a rotating device 4, an excavation device 5, a limiting device 6 and a third support shoe device 7.

[0046] The shield body 1 is provided with a first oil cylinder seat 11, a second oil cylinder seat 12, a third oil cylinder seat 13 and a fourth oil cylinder seat 14.

[0047] The first support shoe device 2 comprises a first oil cylinder 21, a second oil cylinder 22 and a first support shoe 23, the fixed end of the first oil cylinder 21 is connected to the shield body 1 through the first oil cylinder seat 11, and the first support shoe 23 is installed on the driving end of the first oil cylinder 21; the driving end of the second oil cylinder 22 is hinged to the fixed end of the first oil cylinder 21 through the fourth oil cylinder seat 211, and the fixed end of the second oil cylinder 22 is hinged to the shield body 1 through the second oil cylinder seat 12.

[0048] Preferably, the first support shoe device 2 is provided with two groups of first support shoe devices 2 arranged symmetrically along the central axis of the shield body 1, and each group of first support shoe devices 2 is provided with at least two first support shoes 23 arranged side by side. Specifically, two groups of first support shoe devices 2 are preferably arranged on the two side end faces of the shield body 1, respectively, and the first support shoe devices 2 arranged on the different two side end faces of the shield body 1 are arranged correspondingly.

[0049] Further preferably, the first oil cylinder seat 11 is provided with a first oil cylinder 21 arranged one-to-one, and the second oil cylinder seat 12 is provided with a second oil cylinder 22 arranged one-to-one.

[0050] The second supporting shoe device 3 comprises a third oil cylinder 31, a fourth oil cylinder 32, a second supporting shoe 33 and a first pressure cover 34. The fixed end of the third oil cylinder 31 is connected with the shield 1 through a second oil cylinder seat 12, and the driving end of the third oil cylinder 31 is hingedly connected with the second supporting shoe 33. The driving end of the fourth oil cylinder 32 is hingedly connected with the fixed end of the third oil cylinder 31 through a sixth oil cylinder seat 311, and the fixed end of the fourth oil cylinder 32 is hingedly connected with the shield 1 through a fourth oil cylinder seat 14. Specifically, the pressure cover 34 is installed on the driving end of the third oil cylinder 31, and a first ball head hinged structure is installed on the second supporting shoe 33. The first ball head seat 331 in the first ball head hinged structure is fixedly connected with the second supporting shoe 33, and the first ball head 312 in the first ball head hinged structure is fixedly connected with the pressure cover 34.

[0051] Preferably, the second supporting shoe device 3 is provided with two groups of devices symmetrically arranged along the central axis of the shield 1, and each group of the second supporting shoe device 3 is provided with at least two devices arranged side by side. The end surface of the shield 1 for arranging the first supporting shoe device 2 is perpendicular to the end surface for arranging the second supporting shoe device 3. Specifically, two groups of second supporting shoe devices 3 are preferably arranged on the two parallel side end surfaces of the shield 1, respectively. The second supporting shoe devices 3 arranged on the different side end surfaces of the shield 1 are arranged correspondingly and perpendicularly to the first supporting shoe device 2.

[0052] The fixed end of the rotating device 4 is fixedly connected with the shield 1, and the driving end of the rotating device 4 is provided with the excavating device 5. The rotating device 4 is used to drive the excavating device 5 to rotate 360 degrees relative to the shield 1. Preferably, the specific structure of the rotating device 4 refers to the prior art.

[0053] Preferably, to increase the excavation depth each time, the rotary device 4 is further provided with an anti-torque assembly 43 and an axial limiting hole 44; the anti-torque assembly 43 is used to limit the torque generated by the rotary device 4 during work, and the anti-torque assembly 43 is provided with a plurality of groups (preferably four groups in this embodiment, and the four groups of anti-torque assemblies 43 are not arranged on the central axis of the rotary device 4) arranged along the circumference of the rotary device 4; the axial limiting hole 44 is provided with two axial limiting holes 44 arranged side by side with the second supporting shoe device 3; and a limiting device 6 is mounted in each axial limiting hole 44, the limiting device 6 includes a fifth oil cylinder 61 and a limiting block 62, one end of the fifth oil cylinder 61 is fixedly connected with the shield body 1, the other end of the fifth oil cylinder 61 is provided with the limiting block 62, the fifth oil cylinder 61 drives the limiting block 62 to move in the axial limiting hole 44 towards or away from the rotary device 4, the limiting block 62 is gap-fitted with the limiting plate in the shield body 1 to prevent the limiting block 62 from deviating during movement; during assembly of the whole vertical shaft tunneling machine, the fifth oil cylinder 61 of the limiting device 6 is extended, so that the limiting block 62 is inserted into the axial limiting hole 44 in the rotary device 4, thereby limiting the axial movement of the rotary device 4.

[0054] The excavation device 5 includes a telescopic arm 51, a swing oil cylinder 52 and a cutter head 53; the telescopic arm 51 is hingedly connected with the driving end of the rotary device 4, one end of the swing oil cylinder 52 is hingedly connected with the rotary device 4 through the seventh oil cylinder seat 41, the other end of the swing oil cylinder 52 is hingedly connected with the telescopic arm 51 through the ninth oil cylinder seat 511, and the swing oil cylinder 52 is used to drive the telescopic arm 51 to swing; the cutter head 53 is mounted on the end of the telescopic arm 51 away from the rotary device 4, and is used for excavation. Preferably, the structure of the cutter head 53 refers to the prior art.

[0055] When the shaft boring machine starts, all the oil cylinders are in the initial position. When the shaft boring machine starts to bore, the second oil cylinder 22 and the fourth oil cylinder 32 extend, so that the first oil cylinder 21 and the third oil cylinder 31 are in a horizontal position. When the first oil cylinder 21 and the third oil cylinder 31 are in a horizontal position, the first oil cylinder 21 and the third oil cylinder 31 extend, so that the first support shoe 23 and the second support shoe 33 adhere to the hole wall, providing sufficient support for the shaft boring machine to prevent the shaft boring machine from sinking due to gravity. The swing oil cylinder 52 is distributed on both sides of the excavation device 5. The swing oil cylinder 52 extends and retracts to drive the swing of the telescopic arm 51, and then the cutter head 53 excavates the excavation surface. Because the telescopic arm 51 can extend a certain distance, the cutter head 53 can increase the excavation depth. The rotation device 4 starts to rotate clockwise, and can rotate counterclockwise starting from the rotation starting point, so as to realize 360-degree excavation of the cutter head 53. Because the excavation surface is rectangular, there is a certain blind area in the excavation of the cutter head 53. In order to avoid the existence of the blind area of the excavation surface, all the third oil cylinders 31 in the second support shoe device 3 are retracted, and the second support shoe 33 is separated from the hole wall. At the same time, one side of the first oil cylinder 21 in the first support shoe device 2 extends, and the other side of the first oil cylinder 21 retracts. The first support shoe 23 is still tightly adhered to the hole wall. After the shield body reaches the position, the third oil cylinder 31 in the second support shoe device 3 extends to make the second support shoe 33 adhere to the hole wall. Then, the rotation device 4 and the excavation device 5 jointly excavate the blind area. If the excavation blind area exists on the side of the second support shoe device 3, then on the basis of the existing position of the shield body 1, all the first oil cylinders 21 in the first support shoe device 2 are retracted, and the first support shoe 23 is away from the hole wall. At the same time, one side of the third oil cylinder 31 in the second support shoe device 3 extends, and the other side of the third oil cylinder 31 retracts. All the second support shoes 33 are tightly adhered to the hole wall. After the shield body reaches the position, all the first oil cylinders 21 of the first support shoe device 2 extend, and the first support shoe 23 adheres to the hole wall. Then, the rotation device 4 and the excavation device 5 jointly excavate the blind area.

[0056] Referring to Figure 3 As shown in FIG. 5, in order to increase the working efficiency of the rectangular shaft boring machine, after the shaft boring machine completes the excavation layer, the next step of the excavation surface action is needed. All the third oil cylinders 31 in the second support shoe device 3 are retracted, and the second support shoe 33 is separated from the hole wall. The fourth oil cylinder 32 retracts, and then the third oil cylinder 31 extends at an angle of 45°-50° with the shield body 1. Because the second support shoe 33 is connected with the third oil cylinder 31 through the first ball head seat 312, the second support shoe 33 can rotate at an angle of less than 10°. After the second support shoe 33 adheres to the hole wall, all the first oil cylinders 21 in the first support shoe device 2 are retracted, and the first support shoe 23 is separated from the hole wall. The fourth oil cylinder 32 in the second support shoe device 3 extends to make the third oil cylinder 31 in a horizontal state. The whole process can be repeated multiple times until the shield body 1 reaches the predetermined position, and then excavation is performed.

[0057] Referring to Figure 7As shown, after the shaft tunneling machine completes a once excavation face work, the telescopic arm 51 is in the state of stretching out, the swing arm 52 is adjusted, the position of the telescopic arm 51 is adjusted to the axis position, the fifth oil cylinder 61 in the limiting device 6 is retracted to drive the limiting block 62 to move, the axial movement of the rotating device 4 is released, the telescopic arm 51 is retracted, the rotating device 4 is lowered to another limiting hole 44, the fifth oil cylinder 61 is extended to drive the limiting block 62 to re-extend into the axial limiting hole 44 in the rotating device 4, thereby limiting the axial movement of the rotating device 4, and the shaft tunneling machine re-excavates.

[0058] When the rotating device 4 cannot be lowered any more, the axial limitation of the rotating device 4 needs to be released, the first supporting shoe device 2 and the supporting shoe system 2 are matched to make the shield body 1 lower, and the shaft tunneling machine excavates again. If there is damage to the components in the rotating device 4 and the excavation device 5, the whole rotating device 4 and the excavation device 5 can be lifted to the ground for maintenance.

[0059] As a further embodiment of the present application, when the rotating device 4 is in the process of lowering, the cutter head 53 plays a supporting role, in order to avoid damage to the cutter head in this process, a third supporting shoe device 7 is further arranged in the rotating device 4, the third supporting shoe device 7 comprises a sixth oil cylinder 71 and a third supporting shoe 73, the fixed end of the sixth oil cylinder 71 is fixedly connected with the rotating device 4, and the driving end of the sixth oil cylinder 71 is hingedly connected with the third supporting shoe 73. Specifically, a second gland 72 is installed on the driving end of the sixth oil cylinder 71, a second ball head hinged structure is installed on the third supporting shoe 73, a second ball head seat 731 in the second ball head hinged structure is fixedly connected with the third supporting shoe 73, and a second ball head 711 in the second ball head hinged structure is fixedly connected with the second gland 72, and the ball hinge between the sixth oil cylinder 71 and the third supporting shoe 73 is adopted to increase the contact area of the third supporting shoe 73 and the excavation face.

[0060] When the shaft tunneling machine completes an excavation face and needs to excavate the next layer, the sixth oil cylinder 71 in the third supporting shoe device 7 is extended, the third supporting shoe 73 is tightly attached to the excavation face, the fifth oil cylinder 61 in the limiting device 6 is retracted, the limiting block 62 is separated from the rotating device 4 to contact the axial constraint of the rotating device 4, the sixth oil cylinder 71 of the third supporting shoe device 7 is retracted to drive the rotating device 4 to lower, when the sixth oil cylinder 71 stops retraction, the fifth oil cylinder 61 in the limiting device 6 is extended to drive the limiting block 62 to re-limit the axial constraint of the rotating device 4, the sixth oil cylinder 71 continues to retract to the original position, and the shaft tunneling machine excavates the excavation face again.

[0061] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rectangular shaft heading machine characterized in that, The shield tunneling machine comprises a shield body (1), a first support shoe device (2), a second support shoe device (3), a rotating device (4) and an excavating device (5) arranged on the shield body (1); The first support shoe device (2) comprises a first support shoe (23) connected with the shield body (1) through a first oil cylinder (21), and the first support shoe (23) is driven by the first oil cylinder (21) to move in the direction of approaching or moving away from the shield body (1); The second support shoe device (3) comprises a second support shoe (33) connected with the shield body (1) through a third oil cylinder (31), and the second support shoe (33) is driven by the third oil cylinder (31) to move in the direction of approaching or moving away from the shield body (1); The rotating device (4) is connected with the shield body (1) and the excavating device (5) and is used to drive the excavating device (5) to rotate; The excavating device (5) comprises a cutter head (53) used to excavate the soil layer; The rotating device (4) is further provided with an anti-twist component (43) and an axial limiting hole (44); The anti-twist component (43) is used to limit the torque generated by the rotating device (4) during operation; The axial limiting hole (44) is provided with at least two axial limiting holes (44) arranged in parallel with the second support shoe device (3), and a limiting device (6) is arranged in each axial limiting hole (44), and the limiting device (6) is used to limit the axial movement of the rotating device (4); The limiting device (6) comprises a fifth driving member and a limiting block (62), one end of the fifth driving member is fixedly connected with the shield body (1), and the other end of the fifth driving member is provided with the limiting block (62), and during the assembly of the whole machine, the fifth driving member of the limiting device (6) drives the limiting block (62) to extend into the axial limiting hole (44) to limit the axial movement of the rotating device (4).

2. The rectangular shaft sinking machine of claim 1, wherein, The first support shoe device (2) further comprises an inclined second oil cylinder (22), the driving end of the second oil cylinder (22) is hingedly connected with the fixed end of the first oil cylinder (21), and the fixed end of the second oil cylinder (22) is hingedly connected with the shield body (1), and is used to drive the first oil cylinder (21) to extend or retract at an angle of 30°-60° relative to the shield body (1); The second support shoe device (3) further comprises an inclined fourth oil cylinder (32), the driving end of the fourth oil cylinder (32) is hingedly connected with the fixed end of the third oil cylinder (31), and the fixed end of the fourth oil cylinder (32) is hingedly connected with the shield body (1), and is used to drive the third oil cylinder (31) to extend or retract at an angle of 30°-60° relative to the shield body (1).

3. A rectangular shaft sinking machine according to claim 2, characterised in that, The fixed end of the third oil cylinder (31) is connected with the shield body (1) through a third oil cylinder seat (13); A gland (34) is arranged on the driving end of the third oil cylinder (31), a first ball head hinged structure is arranged on the second support shoe (33), a first ball head seat (331) in the first ball head hinged structure is fixedly connected with the second support shoe (33), and a first ball head (312) in the first ball head hinged structure is fixedly connected with the gland (34).

4. The rectangular shaft sinking machine of claim 2, wherein, The first supporting shoe device (2) is provided with two groups symmetrically arranged along the central axis of the shield body (1), and each group of the first supporting shoe device (2) is provided with at least two pieces arranged side by side. The second supporting shoe device (3) is provided with two groups symmetrically arranged along the central axis of the shield body (1), and each group of the second supporting shoe device (3) is provided with at least two pieces arranged side by side. The end surface of the shield body (1) for arranging the first supporting shoe device (2) is perpendicular to the end surface for arranging the second supporting shoe device (3).

5. A rectangular shaft sinking machine according to any one of claims 1 to 4, wherein, A third supporting shoe device (7) is further arranged in the rotating device (4). The third supporting shoe device (7) comprises a sixth driving member and a third supporting shoe (73), the fixed end of the sixth driving member is fixedly connected with the rotating device (4), and the driving end of the sixth driving member is hingedly connected with the third supporting shoe (73) for driving the third supporting shoe (73) to move in the direction of approaching or moving away from the rotating device (4).

6. A rectangular shaft sinking machine according to claim 5, characterised in that, A second ball head hinged structure is arranged between the sixth driving member and the third supporting shoe (73), the second ball head seat (731) in the second ball head hinged structure is fixedly connected with the third supporting shoe (73), and the second ball head (711) in the second ball head hinged structure is fixedly connected with the driving end of the sixth driving member.

7. A rectangular shaft sinking machine according to claim 6, characterised in that, The excavating device (5) further comprises a telescopic arm (51) and a swing oil cylinder (52), the telescopic arm (51) is hingedly connected with the driving end of the rotating device (4), one end of the swing oil cylinder (52) is hingedly connected with the rotating device (4), the other end of the swing oil cylinder (52) is hingedly connected with the telescopic arm (51), and the swing oil cylinder (52) is used for driving the telescopic arm (51) to swing, and the cutter head (53) is installed on the end of the telescopic arm (51) away from the rotating device (4).

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