Multi-cutter-plate planetary vertical shield machine and construction method thereof

Abstract

The application discloses a multi-cutter-head planetary vertical shield machine and a construction method thereof, which comprises an excavating device and a blade angle ring, and an inner cylindrical surface of the blade angle ring is provided with an inner ring gear; the excavating device comprises a base, a cutter head and a planetary driving mechanism, the cutter head comprises a central cutter head coaxially arranged with the base and a plurality of planetary cutter heads arranged around an outer periphery of the central cutter head, and the planetary driving mechanism comprises a telescopic arm, a telescopic oil cylinder, a gear, a gear driving part and a guide wheel set; the telescopic oil cylinder can drive the telescopic arm to move radially along the base; when the telescopic arm is stretched out, the gear is engaged with the inner ring gear, and the guide wheel set is abutted against upper and lower end surfaces of the inner ring gear; when the gear driving part drives the gear to rotate, the base can rotate relative to the blade angle ring and drive the planetary cutter heads to revolve around the central cutter head. The application can improve the efficiency of forming a vertical shaft space, greatly reduce construction cost and be suitable for excavating a circular vertical shaft with different diameters.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of underground shaft tunneling machine, and particularly relates to a multi-cutterhead planetary vertical shield tunneling machine and a construction method thereof. BACKGROUND

[0002] At present, in the construction of underground space shaft, the vertical shield tunneling equipment using mechanical method has some defects, such as large size, heavy weight, non-standard power requirement, and difficulty in generalization. For example, the German sinking shaft tunneling equipment (VSM), Robbins tunneling machine, and the CJM of China Railway Equipment and Iron Construction Heavy Industry. Most of them use local cutting technology, that is, only one cutting head can cut a small area in the whole cutting area at the same time, and then move the cutting head to cover the whole cutting area. As a result, the walking track of each cutting height is too long, the efficiency is low, especially when the cutting head fails or encounters special hard stratum, the equipment downtime is long, and the equipment occupation cost is high.

[0003] With the change of market demand, the number of vertical shafts under construction at the same time will be more and more. If such equipment is designed in the traditional way, it will cause the equipment to be large and heavy, and the transportation, assembly, disassembly and other costs will be high. Especially when the total project duration is fixed, the number of completed shafts is required to be large, and the duration of a single shaft is short. If the number of tunneling equipment is small, it cannot meet the use demand.

[0004] In order to overcome the above many defects, how to fully utilize the existing technical basic module, and then improve it, reduce the cost, improve the efficiency, and then realize the construction of multiple shafts at the same time, has become a technical problem to be solved in the field. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a multi-cutterhead planetary vertical shield tunneling machine, which can improve the efficiency of shaft space forming, greatly reduce the construction cost, is suitable for excavating circular shafts with different diameters, and has the advantages of dispersed power, simple structure, light weight, modularization, standardization, low cost, short design and manufacturing time; and a construction method using the multi-cutterhead planetary vertical shield tunneling machine.

[0006] To solve the above technical problems, the first aspect of the present application provides a multi-cutter-head planetary vertical shield tunneling machine, which comprises a tunneling device arranged at the lowermost part of the vertical shield tunneling machine and used for tunneling a stratum, a suspension device arranged on the ground and used for controlling the lifting of the tunneling device, a muck discharge device arranged on the ground and used for discharging muck in a well to outside of the well, a segment tightening device arranged on the ground and used for tightening a segment that has been installed, and a heel ring arranged around the outer periphery of the tunneling device and used for supporting the sinking of the segment, wherein the lower end of the heel ring is provided with a cutter head, and the inner cylindrical surface of the heel ring is provided with an inner ring gear; the tunneling device comprises a base, a cutter head and a planetary drive mechanism, the cutter head comprises a central cutter head coaxially arranged with the base and a plurality of planetary cutter heads arranged around the outer periphery of the central cutter head, and the planetary drive mechanism comprises a telescopic arm guide slot, a telescopic arm, a telescopic oil cylinder, a gear, a gear driving component and a guide wheel set, the telescopic arm guide slot is fixed on the base and arranged in the radial direction of the base, the telescopic arm is slidably arranged on the telescopic arm guide slot, the telescopic oil cylinder is mounted on the base, and the telescopic end of the telescopic oil cylinder is connected with the telescopic arm; the gear is rotationally connected with the telescopic arm, the gear driving component is fixed on the telescopic arm, the power output end of the gear driving component is connected with the gear and can drive the gear to rotate; the gear is engaged with the inner ring gear; the guide wheel set is rotationally connected with the telescopic arm and abuts against the upper and lower end surfaces of the inner ring gear; at least one pair of the planetary drive mechanisms are symmetrically arranged, and the outermost planetary cutter heads of the base are mounted on the telescopic arm; when the gear driving component drives the gear to rotate, the base can rotate relative to the heel ring under the transmission action of the gear and the inner ring gear, and drive the planetary cutter heads to revolve around the central cutter head.

[0007] As a preferred scheme of the present application, the heel ring is a prefabricated reinforced concrete part, a steel plate is pre-buried on the inner cylindrical surface of the heel ring, and the inner ring gear is welded on the steel plate.

[0008] As a preferred scheme of the present application, the guide wheel set comprises an upper guide wheel and a lower guide wheel, the upper guide wheel is rotationally connected on the upper side of the front end of the telescopic arm, the lower guide wheel is rotationally connected on the lower side of the front end of the telescopic arm, when the telescopic arm moves the upper guide wheel and the lower guide wheel to the position of the inner ring gear, the wheel surface of the upper guide wheel abuts against the upper end surface of the inner ring gear, and the wheel surface of the lower guide wheel abuts against the lower end surface of the inner ring gear.

[0009] As a preferred scheme of the present application, on the horizontal plane of any tunneling depth of the tunneling device, the planetary cutter heads revolve around the central cutter head by no less than a set angle; the set angle is 360° divided by the number of the planetary cutter heads that are equidistantly arranged in the circumferential direction of the same diameter of the base.

[0010] As a preferred embodiment of the present invention, the plurality of planetary cutter heads are arranged in pairs, and each group of planetary cutter heads is arranged on different diameters of the base, and the two planetary cutter heads in each group are arranged symmetrically envelopingly on the same radial direction of the base.

[0011] As a preferred embodiment of the present invention, each set of planetary cutterheads is arranged on different radial directions of the base.

[0012] As a preferred embodiment of the present invention, the diameter of the central cutter head is larger than the diameter of the planetary cutter heads; the sum of the diameter of the central cutter head and the diameters of the plurality of planetary cutter heads is greater than or equal to the outer diameter of the cutting edge ring.

[0013] As a preferred embodiment of the present invention, the central cutter head and the planetary cutter head are respectively connected to a cutter head drive unit for driving the central cutter head and the planetary cutter head to rotate and cut.

[0014] As a preferred embodiment of the present invention, the tube segment is formed by connecting several circular arc tube segments end to end, and the tube segments are provided in multiple layers and stacked on the top surface of the blade ring to form a vertical ceiling.

[0015] Furthermore, a second aspect of the present invention provides a construction method using the multi-cutterhead planetary vertical tunnel boring machine described above, comprising the following steps:

[0016] S1. Construction preparation: equipment arrival, measurement and positioning, and construction of work platform;

[0017] S2. Equipment installation: Install the tunneling device in the working chamber formed by the cutting edge ring, and hoist it to the intended tunneling position using a suspension device;

[0018] S3. Segment installation: Several prefabricated arc segments are hoisted sequentially to the blade ring and / or the top surface of the installed segments using a suspension device and assembled into a circular segment.

[0019] S4. Tunneling construction,

[0020] S4-1. Before the tunneling device cuts, the telescopic boom is extended to the position. At this time, the maximum diameter formed by the planetary cutterhead on the telescopic boom along the center of the tunneling device is greater than or equal to the outer diameter of the cutting edge ring. Then, the central cutterhead and planetary cutterhead are driven to rotate by the cutterhead drive unit to cut the strata below. At the same time, the slag is discharged through the slag discharge device.

[0021] S4-2. While maintaining the rotation of the central cutterhead and planetary cutterhead for cutting, start the gear drive component so that the base can rotate relative to the cutting edge ring under the transmission action of the gear and the internal gear ring. This drives the planetary cutterhead to revolve around the central cutterhead in the forward direction for no less than a set angle, and then in the reverse direction for no less than this set angle. This cycle repeats. During the movement, the strata below are continuously excavated, eventually forming a complete circular excavation face. During the rotary cutting process, the tunnel segments sink vertically by their own weight and the counterweight on the working platform. The installed tunnel segments are tightened periodically using the tunnel segment tightening device. This cycle repeats until the tunneling device has tunneled to the designed depth.

[0022] S4-3, retract the telescopic boom, so that the planetary cutterhead on the telescopic boom retracts into the base, and at the same time, the gear and guide wheel assembly disengage from the internal gear ring; then, the tunneling device is lifted out of the well formed by the segment using the suspension device, and the slag removal device is also moved out, while the cutting edge remains at the design depth position.

[0023] S4-4. Pour a concrete base slab at the bottom of the courtyard;

[0024] S5. Vertical shaft structure treatment;

[0025] S6. Equipment and facilities are removed from the site.

[0026] The advantages of implementing the multi-cutterhead planetary vertical tunnel boring machine and its construction method provided by this invention compared with the prior art are as follows:

[0027] (1) The multi-cutterhead planetary vertical shield machine of the present invention has changed the disadvantages of traditional vertical shaft excavation equipment that are heavy and have many accessories. It innovatively proposes the invention concept of arranging multiple planetary cutterheads in the envelope for rotating and revolving in combination for excavation, and provides specific construction methods, which greatly improves the efficiency of vertical shaft space formation and greatly reduces construction costs. Moreover, according to the change of the diameter and position of the planetary cutterheads on the telescopic arm, it can realize the excavation of circular vertical shafts with different diameters.

[0028] (2) The multi-cutterhead planetary vertical shield machine of the present invention, through the design of the tunneling device, simplifies the design, manufacturing, electromechanical-hydraulic system control, transportation, assembly, and disassembly of the vertical shield machine. Furthermore, since the tunneling device and the cutting edge ring are separate structures, the tunneling device can be quickly separated and recovered by retracting the telescopic arm after tunneling to the designed depth. This not only improves construction efficiency but also ensures low project cost. It also enables construction with simultaneous tunneling, sinking, and support across the entire cross-section, which is simple, easy to implement, and yields good overall construction results. The multi-cutterhead planetary vertical shield machine of the present invention can be applied to large-scale civil foundations, underground garages, underground storage (such as oil wells and grain silos), underground civil defense facilities, mining shafts, and other projects.

[0029] (3) The multi-cutter-head planetary vertical shield machine has the advantages of dispersed power, simple structure, light weight, modularization, standardization, low cost, short design and manufacturing time. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced as follows.

[0031] Figure 1 is a structural schematic view of the multi-cutter-head planetary vertical shield machine of the embodiment of the present application;

[0032] Figure 2 is a structural schematic view of the multi-cutter-head planetary vertical shield machine of the embodiment of the present application;

[0033] Figure 3 is a structural schematic view of the tunneling device and the blade angle ring;

[0034] Figure 4 is a structural schematic view of the planetary drive mechanism;

[0035] Figure 5 is a structural schematic view of the multi-cutter-head planetary vertical shield machine in the upward direction when the telescopic arm is extended;

[0036] Figure 6 is a structural schematic view of the multi-cutter-head planetary vertical shield machine in the upward direction when the telescopic arm is retracted;

[0037] Figure 7 is a structural schematic view of the multi-cutter-head planetary vertical shield machine of the embodiment of the present application when tunneling to the bottom;

[0038] Figure 8 is a structural schematic view of the multi-cutter-head planetary vertical shield machine of the embodiment of the present application when the tunneling device is hoisted out of the roof after tunneling is completed;

[0039] Figure 9 is a structural schematic view of the multi-cutter-head planetary vertical shield machine of the embodiment of the present application when the bottom of the roof is poured with a concrete bottom plate after tunneling is completed.

[0040] Markings in the drawings:

[0041] 1, stratum; 11, operation platform; 12, working area;

[0042] 2, tunneling device; 21, base; 22, cutter head; 23, planetary drive mechanism; 221, central cutter head; 222, planetary cutter head;

[0043] 231, telescopic arm guide groove; 232, telescopic arm; 233, telescopic oil cylinder; 234, gear; 235, gear driving part; 236, guide wheel set;

[0044] 3, suspension device;

[0045] 4. A slagging device;

[0046] 5. A segment;

[0047] 6. A segment clamping device;

[0048] 7. A blade corner ring; 71, a blade; 72, an inner gear ring;

[0049] 8. A concrete bottom plate. DETAILED DESCRIPTION

[0050] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application.

[0051] The drawings are only used for illustrative purposes, and should not be understood as limiting the scope of the patent; in order to better illustrate the embodiments, some components of the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0052] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship generally based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application; simplify the description, in the absence of the opposite description, these orientation words do not indicate; imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0054] As Figure 1 and Figure 2As shown, a preferred embodiment of the present invention provides a multi-cutterhead planetary vertical tunnel boring machine, which includes a tunneling device 2 located at the bottom of the vertical tunnel boring machine for tunneling strata 1, a suspension device 3 located on the ground for controlling the raising and lowering of the tunneling device 2, a slag discharge device 4 located on the ground for discharging slag from the shaft, a segment clamping device 6 located on the ground for clamping the installed segments 5, and a cutting edge ring 7 surrounding the tunneling device 2 for supporting the sinking of the segments 5.

[0055] It should be noted that the suspension device 3 facilitates the hoisting of the tunneling device 2 into or out of the well when starting work, performing maintenance, or completing work; the pipeline of the slag discharge device 4 extends into the tunneling device 2 through the well, providing a conveying channel for the tunneling device 2 to discharge the slag and mud generated during cutting; the segment tensioning device 6 tightens the segments 5 with steel wire ropes to ensure the waterproof sealing effect between the segments 5.

[0056] like Figure 3 As shown, the lower end of the cutting edge ring 7 is provided with a cutting edge 71, which allows the cutting edge ring 7 to cut into the underlying stratum 1 more smoothly; the inner cylindrical surface of the cutting edge ring 7 is provided with an internal gear ring 72. In this embodiment, the cutting edge ring 7 is a precast reinforced concrete component, and a steel plate is pre-embedded in the inner cylindrical surface of the cutting edge ring 7, and the internal gear ring 72 is welded to the steel plate.

[0057] like Figure 3 and Figure 4As shown, the tunneling device 2 comprises a base 21, a cutter head 22 and a planetary drive mechanism 23, the cutter head 22 comprises a central cutter head 221 coaxially arranged with the base 21 and a plurality of planetary cutter heads 222 arranged around the outer periphery of the central cutter head 221, the planetary drive mechanism 23 comprises a telescopic arm guide slot 231, a telescopic arm 232, a telescopic oil cylinder 233, a gear 234, a gear driving component 235 and a guide wheel set 236, the telescopic arm guide slot 231 is fixed on the base 21 and arranged along the radial direction of the base 21, the telescopic arm 232 is slidably arranged on the telescopic arm guide slot 231, the telescopic oil cylinder 233 is installed on the base 21, and the telescopic end of the telescopic oil cylinder 233 is connected with the telescopic arm 232; the gear 234 is rotationally connected with the telescopic arm 232, the gear driving component 235 is fixed on the telescopic arm 232, the power output end of the gear driving component 235 is connected with the gear 234 and can drive the gear 234 to rotate; the gear 234 is engaged with the inner ring gear 72; the guide wheel set 236 is rotationally connected with the telescopic arm 232 and abuts against the upper and lower end faces of the inner ring gear 72; the planetary cutter head 222 located at the outermost side of the base 21 is installed on the telescopic arm 232; the planetary drive mechanism 23 is symmetrically arranged with at least one pair of the planetary cutter heads 222 located at the outermost side of the base 21 installed on the telescopic arm 232. Thus, by extending the telescopic arm 232, on the one hand, the guide wheel set 236 can abut against the upper and lower end faces of the inner ring gear 72, so as to realize the quick connection between the tunneling device 2 and the blade angle ring 7, and on the other hand, the gear 234 can be engaged with the inner ring gear 72, when the gear driving component 235 drives the gear 234 to rotate, the base 21 can rotate relative to the blade angle ring 7 under the transmission of the gear 234 and the inner ring gear 72, and drive the planetary cutter heads 222 to revolve around the central cutter head 221, so as to realize the revolving cutting of the plurality of planetary cutter heads 222.

[0058] It should be noted that the central cutter head 221 and the planetary cutter head 222 are respectively connected with a cutter head driving unit (not indicated in the figure), which is used to drive the central cutter head 221 and the planetary cutter head 222 to cut by revolving.

[0059] The multi-cutter-head planetary vertical shield tunneling machine provided by the embodiment of the present application changes the shortcomings of the conventional shaft tunneling device, such as large weight and many accessories, and innovatively proposes the inventive concept of arranging a plurality of planetary cutter heads 222 in an envelope line to cut by revolving and revolving, and provides a specific construction method, which greatly improves the efficiency of the shaft space forming and greatly reduces the construction cost; and according to the change of the diameter and position of the planetary cutter head 222 on the telescopic arm 232, the circular shaft with different diameters can be excavated.

[0060] And, through the design of the tunneling device 2, the design and manufacture of the vertical shield machine, the control of the mechanical and electrical and hydraulic system, transportation, assembly, disassembly and other work are simple; since the tunneling device 2 and the blade angle ring 7 are of a split structure, the tunneling device 2 can be quickly separated and recovered by retracting the telescopic arm 232 after tunneling to the designed depth, which can improve the construction efficiency, ensure low project cost, and realize full-face edge tunneling, edge sinking and edge supporting construction, which is simple and easy to implement, and has good overall construction effect; the multi-cutterhead planetary vertical shield machine of the application can be applied to large civil foundations, underground garages, underground warehouses (such as oil wells and grain stores), underground civil air defense, mining shafts and other projects.

[0061] Therefore, the multi-cutterhead planetary vertical shield machine of the application has the advantages of dispersed power, simple structure, light weight, modularity, standardization, low cost, short design and manufacturing time.

[0062] For example, as shown in Figure 4 The guide wheel set 236 includes an upper guide wheel and a lower guide wheel, the upper guide wheel is rotatably connected to the upper side of the front end of the telescopic arm 232, and the lower guide wheel is rotatably connected to the lower side of the front end of the telescopic arm 232; when the telescopic arm 232 moves the upper guide wheel and the lower guide wheel to the position of the inner gear ring 72, the wheel surface of the upper guide wheel is just pressed against the upper end surface of the inner gear ring 72, and the wheel surface of the lower guide wheel is just pressed against the lower end surface of the inner gear ring 72. Such a design allows the tunneling device 2 to be axially fixed in the blade angle ring 7 while reducing the friction when the tunneling device 2 and the blade angle ring 7 rotate relative to each other.

[0063] For example, to ensure the integrity of the excavation surface, the planetary cutterhead 222 performs back-and-forth revolution around the central cutterhead 221 by not less than a set angle on the horizontal plane of any tunneling depth of the tunneling device 2; the set angle is 360° divided by the number of planetary cutterheads 222 equally spaced in the circumferential direction of the same diameter of the base 21. In this embodiment, the number of planetary cutterheads 222 equally spaced in the circumferential direction of the same diameter of the base 21 is two, i.e. the set angle is 180 degrees, so the planetary cutterhead 222 performs back-and-forth revolution around the central cutterhead 221 by not less than 180 degrees.

[0064] For example, as shown in Figure 5 and Figure 6As shown, to reduce the number of planetary cutterheads 222 and decrease the weight of the tunneling device 2, multiple planetary cutterheads 222 are arranged in pairs. Each pair of planetary cutterheads 222 is arranged on different diameters of the base 21, and the two planetary cutterheads 222 in each pair are symmetrically arranged in the same radial direction of the base 21. Preferably, the arrangement of each pair of planetary cutterheads 222 on different radial directions of the base 21 separates the pairs of planetary cutterheads 222 on different diameters, allowing for overlapping areas in the envelopes of the pairs of planetary cutterheads 222. Compared to the structure of arranging the pairs of planetary cutterheads 222 on the same radial direction (i.e., a "one"-shaped arrangement), this design reduces the difficulty of designing the shape and size of the planetary cutterheads 222.

[0065] For example, such as Figure 5 and Figure 6 As shown, to ensure the cutting performance of the cutting area corresponding to each cutter head 22, the diameter of the central cutter head 221 is larger than the diameter of the planetary cutter head 222; the sum of the diameter of the central cutter head 221 and the diameters of the multiple planetary cutter heads 222 is greater than or equal to the outer diameter of the cutting edge ring 7.

[0066] It should be noted that when the diameter of the tunnel boring machine (TBM) shaft is 12m, the diameter of the central cutterhead 221 is 3m, and the diameter of the planetary cutterhead 222 is 1.5m. This means that within a single radius, three planetary cutterheads 222 and one central cutterhead 221 are sufficient to cover the entire radius: 3 × 1.5 + 3 / 2 = 6m. To improve efficiency, the planetary cutterheads 222 are arranged symmetrically, with two planetary cutterheads 222 arranged along the circumference of the same diameter. Of course, four planetary cutterheads 222 can be arranged to further increase efficiency. When the diameter of the TBM shaft changes to 15m, only one additional planetary cutterhead 222 is needed within a single radius to cover the entire radius: 4 × 1.5 + 3 / 2 = 7.5m. This allows the combined cutterhead 22 to adapt to different TBM shaft diameters.

[0067] For example, such as Figure 7 As shown, the tube segment 5 is formed by connecting several arc-shaped tube segments end to end. The tube segment 5 has multiple segments that are stacked layer by layer on the top surface of the blade ring 7 to form a vertical ceiling.

[0068] In addition, such as Figures 1 to 9 As shown, the present invention also provides a construction method using the multi-cutterhead planetary vertical tunnel boring machine described above, which includes the following steps:

[0069] S1. Construction preparation, equipment arrival, measurement and positioning, and construction of work platform 11;

[0070] S2, equipment installation, the tunneling device 2 is installed in the working cavity formed by the blade corner ring 7, and is hoisted to the position to be excavated by the suspension device 3, and a working area 12 is formed between the bottom cutter head of the tunneling device 2 and the stratum at the position to be excavated;

[0071] S3, segment 5 installation, a plurality of prefabricated circular-arc segments are hoisted to the top surface of the blade corner ring 7 and / or the top surface of the installed segment 5 by the suspension device 3 in sequence and are assembled into a circular-arc segment 5;

[0072] S4, tunneling construction,

[0073] S4-1, before cutting, the telescopic arm 232 is extended to a position, at which time the maximum diameter of the planetary cutter head 222 on the telescopic arm 232 along the center of the tunneling device 2 is greater than or equal to the outer diameter of the blade corner ring 7, then the central cutter head 221 and the planetary cutter head 222 are driven to rotate by the cutter head driving unit, the stratum 1 below is cut, and the cuttings are discharged by the cutting discharging device 4 at the same time;

[0074] S4-2, while the central cutter head 221 and the planetary cutter head 222 are kept rotating, the gear driving part 235 is started, so that the base 21 can rotate relative to the blade corner ring 7 under the driving action of the gear 234 and the inner ring gear 72, and drives the planetary cutter head 222 to revolve around the central cutter head 221 in a forward direction by not less than a set angle (the set angle is 360° divided by the number of the planetary cutter heads 222 arranged at equal intervals in the circumferential direction of the base 21 with the same diameter), and then revolves in a reverse direction by not less than the set angle, and the cycle is repeated; in the moving process, the stratum 1 below is continuously excavated, and finally a complete circular excavation surface is formed, in the process of rotary cutting, the segment 5 vertically sinks by relying on the self-weight and the counterweight on the operation platform 11, the segment tightening device 6 is used to tighten the installed segment 5 at regular intervals, and the cycle is repeated until the tunneling device 2 is excavated to the designed depth;

[0075] S4-3, the telescopic arm 232 is retracted, the planetary cutter head 222 on the telescopic arm 232 is retracted into the base 21, and at the same time, the gear 234 and the guide wheel set 236 are separated from the inner ring gear 72; then the tunneling device 2 is hoisted out of the raise formed by the segment 5 by the suspension device 3, and the cutting discharging device 4 is also removed, and the blade corner ring 7 remains at the designed depth position;

[0076] S4-4, at the bottom of the raise, the concrete bottom plate 8 is poured;

[0077] S5, shaft structure treatment;

[0078] S6, equipment and facility withdrawal.

[0079] The construction method has the same technical effects as the multi-cutter planetary vertical shield machine, and thus will not be described here again.

[0080] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without any creative effort, and these embodiments will all fall within the protection scope of the present application.

Claims

1. A multi-cutterhead planetary vertical shield machine comprising an excavation device disposed at the lowermost portion of the vertical shield machine and used for excavating a stratum, a suspension device disposed on the ground and used for controlling the elevation of the excavation device, a muck discharge device disposed on the ground and used for discharging muck in a well to the outside, and a segment tightening device disposed on the ground and used for performing a segment tightening operation on a segment that has been installed, characterized in that, The tunneling device further comprises a heel ring arranged around the outer periphery of the tunneling device and used for supporting the sinking of the segment, the heel ring is provided with a cutting edge at the lower end, and an inner ring gear is arranged on the inner cylindrical surface of the heel ring; the tunneling device comprises a base, a cutter head and a planetary drive mechanism, the cutter head comprises a central cutter head coaxially arranged with the base and a plurality of planetary cutter heads arranged around the outer periphery of the central cutter head, and the planetary drive mechanism comprises an extension arm guide slot, an extension arm, an extension oil cylinder, a gear, a gear driving component and a guide wheel set, the extension arm guide slot is fixed on the base and arranged in the radial direction of the base, the extension arm is slidably arranged on the extension arm guide slot, the extension oil cylinder is mounted on the base, and the extension end of the extension oil cylinder is connected with the extension arm; the gear is rotationally connected with the extension arm, the gear driving component is fixed on the extension arm, the power output end of the gear driving component is connected with the gear and can drive the gear to rotate; the gear is engaged with the inner ring gear; the guide wheel set is rotationally connected with the extension arm and abuts against the upper and lower end surfaces of the inner ring gear; at least one pair of the planetary drive mechanisms are symmetrically arranged, and the outermost planetary cutter heads of the base are mounted on the extension arm; When the gear driving component drives the gear to rotate, the base can rotate relative to the heel ring under the transmission of the gear and the inner ring gear, and drive the planetary cutter heads to revolve around the central cutter head.

2. The multi-head planetary vertical shield machine of claim 1, wherein, The heel ring is a prefabricated reinforced concrete part, a steel plate is pre-buried on the inner cylindrical surface of the heel ring, and the inner ring gear is welded on the steel plate.

3. The multi-head planetary vertical shield machine of claim 1, wherein, The guide wheel set comprises an upper guide wheel and a lower guide wheel, the upper guide wheel is rotationally connected to the upper side of the front end of the extension arm, the lower guide wheel is rotationally connected to the lower side of the front end of the extension arm, when the extension arm moves the upper guide wheel and the lower guide wheel to the position of the inner ring gear, the wheel surface of the upper guide wheel abuts against the upper end surface of the inner ring gear, and the wheel surface of the lower guide wheel abuts against the lower end surface of the inner ring gear.

4. The multi-head planetary vertical shield machine of claim 1, wherein, On the horizontal plane of any tunneling depth of the tunneling device, the planetary cutter heads revolve around the central cutter head by no less than a set angle; the set angle is 360° divided by the number of the planetary cutter heads equally spaced in the circumferential direction of the base with the same diameter.

5. The multi-head planetary vertical shield machine of claim 1, wherein, The planetary cutter heads are arranged in groups of two, each group of planetary cutter heads is arranged on a different diameter of the base, and the two planetary cutter heads in each group are symmetrically arranged on the same radial direction of the base.

6. The multi-head planetary vertical shield machine of claim 5, wherein, Each group of planetary cutter heads is arranged on a different radial direction of the base.

7. The multi-head planetary vertical shield machine of claim 6, wherein, The diameter of the central cutter head is greater than the diameter of the planetary cutter heads, and the diameter of the central cutter head plus the sum of the diameters of the planetary cutter heads is greater than or equal to the outer diameter of the heel ring.

8. The multi-head planetary vertical shield machine of claim 1, wherein, The central cutter head and the planetary cutter heads are respectively connected with a cutter head driving unit for driving the central cutter head and the planetary cutter heads to rotate and cut.

9. The multi-head planetary vertical shield machine of claim 1, wherein, The segment is composed of a plurality of circular-arc segments connected end to end, the segment is provided with a plurality of layers of segments stacked on the top surface of the heel ring and forms a vertical roof.

10. A construction method using the multi-cutterhead planetary vertical shield machine according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: S1, construction preparation, equipment access, measurement positioning, erection of operation platform; S2, equipment installation, installing the tunneling device in the working cavity formed by the blade angle ring, and hoisting to the intended tunneling position by the suspension device; S3, segment installation, hoisting a plurality of prefabricated circular segments to the top surface of the blade angle ring and / or the installed segments by the suspension device and assembling into a circular segment; S4, tunneling construction, S4-1, before cutting, extending the telescopic arm to the position, at this time, the planetary cutter head on the telescopic arm has a maximum diameter along the center of the tunneling device greater than or equal to the outer diameter of the blade angle ring, then driving the central cutter head and the planetary cutter head to rotate by the cutter head driving unit, cutting the stratum below while discharging the slag by the slag discharging device; S4-2, while keeping the central cutter head and the planetary cutter head rotating, starting the gear driving part to enable the base to rotate relative to the blade angle ring under the transmission action of the gear and the internal tooth ring, and drive the planetary cutter head to revolve around the central cutter head in a forward direction for no less than a set angle, then reverse revolving for no less than the set angle, and so on; in the moving process, continuously excavating the stratum below, finally forming a complete circular excavation surface, in the process of rotary cutting, the segment relies on the weight and the counterweight on the operation platform to vertically sink, regularly using the segment tightening device to tighten the installed segment, and so on, until the tunneling device tunnels to the designed depth; S4-3, retracting the telescopic arm, retracting the planetary cutter head on the telescopic arm into the base, at the same time, making the gear and the guide wheel group disengage from the internal tooth ring; then hoisting the tunneling device out of the raise formed by the segment by the suspension device, and the slag discharging device is also removed, while the blade angle ring remains at the designed depth position; S4-4, pouring the concrete bottom plate at the bottom of the raise; S5, vertical shaft structure treatment; S6, equipment and facility retreat.

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