CN119801549B - Retractable tunneling machine and its operation method - Google Patents
Retractable tunneling machine and its operation methodInfo
- Publication number
- CN119801549B CN119801549B CN202411897729.3A CN202411897729A CN119801549B CN 119801549 B CN119801549 B CN 119801549B CN 202411897729 A CN202411897729 A CN 202411897729A CN 119801549 B CN119801549 B CN 119801549B
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- breast plate
- retractable
- shield
- tunneling machine
- stabilizing mechanism
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Abstract
本发明为一种可回退掘进机及其作业方法，可回退掘进机包括盾体结构，盾体结构连接管节结构；胸板结构，包括外围胸板，外围胸板内能拆卸地连接内胸板，内胸板上连接有能顶抵于盾体结构的内壁的第一移动结构；切削刀盘结构，切削刀盘结构的径向尺寸呈能调节的设置；切削刀盘结构连接电机及驱动结构；移动稳定机构，包括牵引本体，牵引本体上连接有第二移动结构；移动稳定机构用于将内胸板、切削刀盘结构、电机及驱动结构牵引回退至始发井。本发明可不设置接收井，整体稳定回退至始发井，回退时不会倾覆，回退作业相对简单、安全、高效，拓展了矩形掘进机的应用场景，具有良好的经济效益。
This invention relates to a retractable tunneling machine and its operating method. The retractable tunneling machine includes a shield structure connected to a pipe section structure; a breast plate structure including an outer breast plate with an inner breast plate detachably connected thereto, and a first movable structure connected to the inner breast plate that can abut against the inner wall of the shield structure; a cutterhead structure with an adjustable radial dimension; a motor and drive structure connected to the cutterhead structure; and a moving stabilizing mechanism including a traction body with a second movable structure connected thereto. The moving stabilizing mechanism is used to pull the inner breast plate, cutterhead structure, motor, and drive structure back to the starting shaft. This invention eliminates the need for a receiving shaft, allowing for stable retraction back to the starting shaft without overturning. The retraction operation is relatively simple, safe, and efficient, expanding the application scenarios of rectangular tunneling machines and offering significant economic benefits.
Description
Technical Field
The invention relates to the technical field of tunnel boring machines, in particular to a rollback boring machine and an operation method thereof.
Background
Rectangular (quasi-rectangular) pipe jacking machine construction is widely applied to tunneling construction in the fields of highways, railways, municipal administration, rail transit and the like due to the advantages of small influence on surrounding environment, wide application geological range, safety, reliability, easy control of jacking precision, high construction efficiency and the like. In the construction process of the conventional rectangular (quasi-rectangular) pipe jacking method, a separate receiving well is generally required to be arranged to finish equipment receiving and lifting operation, and the requirement limits the popularization and application of the pipe jacking method to a certain extent.
(1) In a busy urban area, due to the limitation of construction conditions such as dense underground pipelines, collision of surrounding buildings (structures), heavy ground traffic and the like, the condition of independently setting a receiving well is not provided on a construction site in many cases;
(2) Or because the pipe-jacking tunnel is buried deeply, the depth of the needed receiving well is too large, the construction cost is very high, and because of the arrangement of the receiving well, the manufacturing cost of the whole project is greatly increased;
(3) Or because of the use and operation requirements, a communication channel is required to be arranged between two underground projects which are already built and put into use, and the construction of the communication channel is required to not influence the normal operation of the underground spaces at two ends.
In the three application scenes, the traditional pipe jacking construction method cannot be implemented, however, with the continuous promotion of urban construction work, the possibility of occurrence of the three special working conditions is increased.
Under the background, the special-shaped push bench capable of backing and the matched construction method thereof are developed, so that the special-shaped push bench can be constructed by using a push bench under the condition that a receiving well is not arranged, and the special-shaped push bench has higher practicability and economy.
In the prior art, a rollback type tunneling machine and an in-tunnel recombination starting method (CN 117386387A) thereof realize in-tunnel rollback and recombination functions of the tunneling machine by arranging a folding cutter head, but the tunneling machine is of a circular section, and an excavating device is of a circular cutter head and is generally applied to the field of small tunnels such as subway communication channels, municipal pipeline tunnels and the like. However, tunnel structures such as urban pedestrian passageway, subway entrance passageway and the like are generally rectangular (quasi-rectangular) special-shaped section tunnels, and the heading machine provided by the invention is not applicable.
The second prior art discloses a retractable heading machine (CN 117722193 a) which realizes a retractable function by setting a cutterhead into two parts of an outer ring cutterhead and an inner retractable cutterhead. The third prior art discloses a push bench device (CN 115628069 a) capable of being retracted, which realizes the function of being retracted by arranging a foldable reaming blade. However, the second and third technologies have the same problems as the first technology, and the two technologies are still round in cross section and are not suitable for tunnels with rectangular or rectangular-like cross sections such as urban pedestrian passages, subway entrance and exit passages and the like.
Therefore, the inventor provides a rollback heading machine and an operation method thereof by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to provide a rollback heading machine and an operation method thereof, which solve the problem that the current rectangular heading machine cannot be used because a receiving well cannot be arranged or is not suitable to be arranged.
The object of the invention is achieved in that a retractable heading machine comprises:
the shield body structure is connected with a pipe joint structure for supporting the tunnel at one end, close to the starting well, of the shield body structure;
The breast board structure comprises an annular peripheral breast board which can be fixedly connected to the inner wall of the shield body structure, the peripheral breast board can be detachably connected with an inner breast board, and the inner breast board is connected with a first moving structure which can prop against the inner wall of the shield body structure;
The cutting cutterhead structure is arranged on one side of the inner chest plate, which is far away from the originating well, and the radial dimension of the cutting cutterhead structure is in adjustable arrangement;
And the movable stabilizing mechanism can be detachably connected with the inner chest plate and is used for dragging the inner chest plate and the cutter disc structure back to the originating well.
In a preferred embodiment of the present invention, the movement stabilizing mechanism includes a traction body detachably connected to the inner chest plate, and a second movement structure capable of propping against the inner walls of the shield structure and the pipe joint structure is connected to the traction body.
In a preferred embodiment of the present invention, the retractable heading machine further includes a screw conveyor for tapping the heading machine, wherein an end of the screw conveyor away from the originating well is detachably connected to the bottom end of the inner chest plate, and an end of the screw conveyor close to the originating well is disposed obliquely upward and detachably connected to the inner wall of the shield structure;
The retractable heading machine further comprises a plurality of shield tail direction adjusting articulated cylinders which are arranged at intervals along the circumferential direction of the shield body structure, one end, away from the originating well, of each shield tail direction adjusting articulated cylinder is detachably connected with the inner wall of the shield body structure, and one end, close to the originating well, of each shield tail direction adjusting articulated cylinder is detachably connected with the pipe joint structure.
In a preferred embodiment of the present invention, the shield structure includes a concrete portion, a steel structure portion is disposed on an inner side of the concrete portion, the steel structure portion forms an inner wall of the shield structure, and an outer side wall of the peripheral chest plate is fixedly connected with the steel structure portion.
Or the shield body structure is a steel structure shield body.
In a preferred embodiment of the present invention, the cutter disc structure includes a plurality of circular cutter discs, and each of the circular cutter discs can be folded to be variable in diameter or telescopic to be variable in diameter.
In a preferred embodiment of the present invention, a plurality of first connection holes are formed on the outer chest plate in a ring manner, a plurality of second connection holes corresponding to the first connection holes are formed on the inner chest plate in a ring manner, and a connection bolt structure is detachably arranged in each of the first connection holes and the second connection holes in a penetrating manner;
and the inner chest plate is provided with an installation penetrating groove for connecting the motor and the driving structure.
In a preferred embodiment of the present invention, the first moving structure includes a plurality of first wheels capable of propping against and clamping the inner walls of the shield structure and the pipe joint structure;
the bottom end of the inner chest plate is provided with a connecting plate extending towards the direction of the originating well, and the connecting plate is connected with at least 2 first wheels capable of being supported on the bottom surfaces of the shield body structure and the pipe joint structure in a rolling way;
And/or the number of the groups of groups,
The side wall of the outline of the inner chest plate is connected with a plurality of first wheels which can be supported on the side surfaces of the shield body structure and the pipe joint structure in a rolling mode.
In a preferred embodiment of the present invention, the first moving structure includes a plurality of first sliding rails capable of propping against and clamping the inner walls of the shield structure and the pipe joint structure.
In a preferred embodiment of the present invention, an end of the traction body away from the originating well is detachably connected to an end of the inner chest plate near the originating well through a connecting rod;
And/or the number of the groups of groups,
One end of the traction body, which is close to the originating well, is connected with a traction rope for traction of the movable stabilizing mechanism, the inner chest plate, the cutting cutterhead structure, the motor and the driving structure;
Or alternatively
And the traction body is provided with a rollback power mechanism for traction of the movable stabilizing mechanism, the inner chest plate, the cutting cutterhead structure, the motor and the driving structure.
The invention also provides a working method of the rollback heading machine, which comprises the following steps:
Step S1, tunneling a construction tunnel structure:
shi Zuoshi, a well is launched, a rollback heading machine is placed in the launching well and installed, the rollback heading machine excavates a stratum forwards, a pipe joint structure is installed, and tunneling construction of a tunnel structure is completed;
Step S2, dismantling operation:
after the tunnel construction is completed, removing the spiral conveyor and the shield tail direction-adjusting hinged oil cylinder of the rollback heading machine, and removing the connection structure between the internal device and the shield body structure;
Step S3, lowering the movable stabilizing mechanism:
Lifting the movable stabilizing mechanism from the originating well and pushing the movable stabilizing mechanism into a pipe joint structure of the tunnel;
step S4, reducing the structure of the cutting cutterhead:
folding or expanding the cutter disc structure and rotating the cutter disc structure to a set position, and then fixing the cutter disc structure;
Step S5, connecting the movable stabilizing mechanism and disassembling the chest plate structure:
Connecting the inner chest plate with the movable stabilizing mechanism, then installing and tightly jacking a jack at the lower part of the inner chest plate, dismantling the connection between the outer chest plate and the inner chest plate, lowering the jack to the first movable structure at the bottom end of the inner chest plate to be in contact with the bottom plate of the shield structure, and removing the jack;
step S6, the rollback heading machine rolls back to the originating well:
under the traction force of the movable stabilizing mechanism, the inner chest plate drives the cutting cutterhead structure, the motor and the driving structure after reducing to retract to the starting well;
Step S7, hanging out the rollback heading machine:
And the stable mechanism, the inner breast plate, the cutting cutterhead structure after diameter change, the motor and the driving structure are wholly retracted to the starting well, and are respectively lifted out of the starting well by adopting a crane on the ground, so that tunneling construction is completed and retraction operation of the tunneling machine is completed.
By the above, the rollback heading machine and the operation method thereof have the following beneficial effects:
In the rollback tunneling machine, the breast board structure is a combined structure, the inner breast board and the peripheral breast board can be rapidly disassembled, the movable stabilizing mechanism can be clamped in the tunnel at the top and the bottom, the cutting cutter disc structure, the motor and the driving structure, and the inner breast board are connected with the movable stabilizing mechanism, and then the whole body can be stably rolled back to an originating well, the rollback operation is relatively simple, safe and efficient, and a receiving well is not required to be arranged.
The invention solves the problem that the current rectangular heading machine cannot be used because the receiving well cannot be arranged or is not suitable to be arranged, can not be arranged, expands the application scene of the rectangular heading machine, and has good economic benefit.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention.
Wherein:
fig. 1 is a schematic diagram of a retractable heading machine according to the present invention in a heading state.
Fig. 2 is a schematic diagram of a state of the retractable heading machine according to the present invention when tunneling is completed.
Fig. 3 is a schematic diagram of a state of the retractable heading machine of the invention when a shield tail steering articulated cylinder and a screw conveyor are removed and a movable stabilizing mechanism is lowered.
Fig. 4 is a schematic view showing a state in which the movement stabilizing mechanism of the present invention enters a tunnel and is connected to an inner chest plate.
Fig. 5 is a schematic view of a retractable entry-driving machine according to the present invention in a state when the retractable entry-driving machine starts to retract.
Fig. 6 is a schematic view showing a state in which the moving stabilization mechanism of the present invention pulls each structure pulled thereon to retract from the shield body structure into the pipe joint structure.
Fig. 7 is a schematic view of the cutter disc structure and breast plate structure of the present invention on the side remote from the originating well during tunneling.
Fig. 8 is a schematic view of the cutter disc structure and breast plate structure of the present invention on the side thereof remote from the originating well prior to retraction.
Fig. 9 is a schematic view of the motor and drive structure and breast plate structure of the present invention on the side adjacent the originating well.
Fig. 10 is a schematic view of a peripheral chest plate of the present invention.
Fig. 11 is a schematic view of the inner chest plate of the present invention.
Fig. 12 is a schematic view of the movement stabilizing mechanism of the present invention.
In the figure:
1. the shield body structure comprises a shield body structure, a concrete part, a steel structure part and a concrete part;
2. a cutter head structure; 201, two side cutterheads, 202, middle cutterheads, 203, spokes;
3. a motor and a driving structure;
4. a screw conveyor;
5. the shield tail is adjusted to a hinged oil cylinder;
6. Chest plate structure, 601, peripheral chest plate, 6011, first connecting hole, 602, inner chest plate, 6021, second connecting hole, 6022, mounting through groove, 603, connecting plate;
7. A first moving structure 701, a first wheel;
8. a moving stabilization mechanism 801, a traction body 802, a second moving structure;
9. A connecting rod;
10. A traction rope;
11. Pipe joint structure, 111, conventional pipe joint, 112, first ring pipe joint;
12. Pushing the oil cylinder;
13. an originating platform structure;
14. an originating well;
15. a receiving end main body structure;
16. And (5) a jack.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
The specific embodiments of the invention described herein are for purposes of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 12, the present invention provides a retractable heading machine, comprising:
the shield body structure 1, one end of the shield body structure 1 close to the starting well 14 is connected with a pipe joint structure 11 for tunnel support;
The breast board structure 6 comprises an annular peripheral breast board 601 which can be fixedly connected to the inner wall of the shield body structure 1, the peripheral breast board 601 can be detachably connected with an inner breast board 602, and the inner breast board 602 is connected with a first moving structure 7 which can prop against the inner wall of the shield body structure 1;
The cutting cutterhead structure 2 is arranged on one side of the inner chest plate 602 far from the starting well 14, the radial dimension of the cutting cutterhead structure 2 is in adjustable arrangement, one side of the cutting cutterhead structure 2 close to the starting well 14 is connected with the motor and driving structure 3, and the motor and driving structure 3 is connected to the inner chest plate 602, namely the cutting cutterhead structure 2 is positioned on the front side of the chest plate structure 6, and the motor and driving structure 3 is positioned on the rear side of the chest plate structure 6;
The movable stabilizing mechanism 8 can be detachably connected with the inner chest plate 602, and the movable stabilizing mechanism 8 is used for dragging the inner chest plate 602, the cutter disc structure 2, the motor and the driving structure 3 back to the originating well 14. Since the movable stabilizing mechanism 8 can be tightly clamped in the tunnel through the second movable structure, the cutter disc structure 2, the motor and driving structure 3 and the inner chest plate 602 are connected to form a whole, and the cutter disc structure cannot topple during retraction.
In the retractable tunneling machine, the breast board structure 6 is of a combined structure, the inner breast board 602 and the outer breast board 601 can be rapidly disassembled, the movable stabilizing mechanism 8 can be clamped in the tunnel in a top-bottom mode, the cutting cutterhead structure 2, the motor and driving structure 3 and the inner breast board 602 are connected with the movable stabilizing mechanism 8, and then the retractable tunneling machine can be integrally and stably retracted to the originating well 14, and the retractable tunneling machine can not be overturned during retraction, is relatively simple, safe and efficient, and does not need to be provided with a receiving well.
The invention solves the problem that the current rectangular (quasi-rectangular) heading machine cannot be used because the receiving well cannot be arranged or is not suitable to be arranged, can not be arranged, expands the application scene of the rectangular (quasi-rectangular) heading machine, and has good economic benefit.
Further, the movable stabilizing mechanism comprises a traction body 801 detachably connected with the inner chest plate 602, and a second movable structure capable of propping against the inner walls of the shield body structure 1 and the pipe joint structure 11 is connected to the traction body 801.
Further, as shown in fig. 1 and 2, the retractable heading machine further comprises a screw conveyor 4 for deslagging of the heading machine, wherein one end of the screw conveyor 4 away from the originating well 14 is detachably connected with the bottom end of the inner breast plate 602, and one end of the screw conveyor 4 close to the originating well 14 is obliquely arranged upwards and is detachably connected with the inner wall of the shield body structure 1.
Further, as shown in fig. 1 and fig. 2, the retractable heading machine further includes a plurality of tail steering articulated cylinders 5 arranged at intervals along the circumferential direction of the shield body structure 1, one end of each tail steering articulated cylinder 5, which is far away from the originating well 14, is detachably connected with the inner wall of the shield body structure 1, and one end of each tail steering articulated cylinder 5, which is close to the originating well 14, is detachably connected with the pipe joint structure 11. The functions of direction adjustment and deviation correction are realized by controlling the expansion and contraction amounts of different shield tail direction adjustment hinged oil cylinders 5.
In a specific embodiment, the connection mode between the shield tail steering hinged oil cylinder 5 and the shield body structure 1 and the pipe joint structure 11 can be bolt connection or welding connection (can be realized in a destructive mode during dismantling).
As shown in fig. 1 and 2, a bracket device is mounted on the front side of the inner wall of the head ring pipe joint 112 of the pipe joint structure 11 and is used for being connected with the shield tail direction-adjusting articulated cylinder 5 and providing shield body advancing power. The rear side of the first ring pipe section 112 is connected to a number of conventional pipe sections 111.
After tunneling operation is completed, the shield tail steering hinged oil cylinder 5 and the screw conveyor 4 are removed, the cutting cutterhead structure 2 is reduced in diameter and rotated to a proper position, the outer breast plate 601 and the inner breast plate 602 are separated, and under the traction effect of the movable stabilizing mechanism 8, the inner breast plate 602 drives the cutting cutterhead structure 2, the motor and the driving structure 3 to integrally and stably retract to the starting well 14.
Further, as shown in fig. 7, 8 and 9, the shield body structure 1 may be a concrete and steel combined structure, including a concrete portion 101 located at the outer side, a steel structure portion 102 is disposed at the inner side of the concrete portion 101, the steel structure portion 102 forms an inner wall of the shield body structure 1, and an outer side wall of the peripheral chest plate 601 is fixedly connected with the steel structure portion 102, and the connection manner may be welding. The shield body structure 1 is formed by combining a steel structure and a concrete structure, and compared with the shield body with a discarded pure steel structure, the shield body with the combined concrete and steel structure has lower manufacturing cost and reduces the shell discarding cost.
Furthermore, the shield body structure 1 can also be completely manufactured by a steel structure to form a steel structure shield body.
Further, the cutter disc structure 2 comprises a plurality of circular cutter discs, and each circular cutter disc can be folded to change the diameter or stretch to change the diameter.
As shown in fig. 7 and 8, the whole circular cutterhead can be divided into two types, namely a two-sided cutterhead 201 and a middle cutterhead 202. The spokes 203 of the cutterhead 201 on two sides need to be folded and reduced or telescopic and reduced according to the requirement of retraction, the middle cutterhead 202 can not be reduced if the requirement of retraction is met, the two cutterhead 201 on two sides need to be rotated to a proper position when the cutterhead 201 on two sides is retracted, the spokes 203 with the folded and reduced or telescopic and reduced faces the outer side of the section and the spokes with the non-reduced diameters face the inner side of the section, the middle cutterhead 202 needs to be rotated to a specific position according to the requirement of space of retraction, if the rotating cutterhead still cannot meet the requirement of space of retraction, the spokes of the middle cutterhead 202 also need to be reduced, and the round cutterhead needs to be fixed after the diameter is reduced (folded or telescopic) and rotated to the proper position, so that the round cutterhead does not rotate in the retraction process.
Further, as shown in fig. 10 and 11, a plurality of first connection holes 6011 are formed in the outer periphery of the chest plate 601, a plurality of second connection holes 6021 corresponding to the first connection holes 6011 are formed in the inner chest plate 602, and the first connection holes 6011 and the second connection holes 6021 are detachably provided with connection bolt structures.
The outer 601 and inner 602 chest plates may also be welded (which may be accomplished in a destructive manner during removal).
The inner chest plate 602 may be a monolithic structure or a structure formed by combining a plurality of steel plates, and the outer chest plate 601 may be a monolithic structure or a structure formed by combining a plurality of steel plates.
Further, as shown in fig. 11, a mounting through groove 6022 for connecting the motor and the driving structure 3 is provided in the inner chest plate 602.
In embodiment 1, as shown in fig. 7, 8 and 9, the cutter disc structure 2 includes 6 circular cutter discs, and accordingly, the number of the mounting through grooves 6022 is 6, and is equally divided into 2 rows. Each row includes 3 circular cutterheads, namely 1 middle cutterhead 202 and 2 two side cutterheads 201.
Further, as shown in fig. 1,2, 3, 4, 5, 6 and 11, the first moving structure 7 includes a plurality of first wheels 701 capable of propping against and clamping the inner walls of the shield body structure 1 and the pipe section structure 11, or the first moving structure 7 includes a plurality of first sliding rails capable of propping against and clamping the inner walls of the shield body structure and the pipe section structure.
Further, the first wheel 701 is mounted on the bottom of the inner chest plate 602, and the first wheel 701 may be mounted on both sides or may not be mounted on the first wheel 701.
Specifically, as shown in fig. 3, a connecting plate 603 extending toward the direction of the originating well is disposed at the bottom end of the inner breast plate 602, and at least 2 first wheels 701 capable of being rollably supported on the bottom surfaces of the shield body structure 1 and the pipe joint structure 11 are connected to the connecting plate 603.
The side walls of the outline of the inner chest plate 602 are connected with a plurality of first wheels 701 which can be rollably supported on the side surfaces of the shield body structure 1 and the pipe joint structure 11.
Further, as shown in fig. 4, 5 and 6, the end of the traction body 801 remote from the originating well 14 is detachably connected to the end of the inner chest plate 602 near the originating well 14 by a connecting rod 9.
In embodiment 1, the number of the connecting rods 9 is 2, the first ends of the 2 connecting rods 9 are connected to the middle position of the traction body 801, the second ends of the 1 connecting rods 9 are connected to the second ends of the connecting rods 603,1 of the connecting plates 9 are connected to the middle position of the inner chest plate 602, and this arrangement is more beneficial to the stability of the retraction traction.
Further, as shown in fig. 4, 5 and 6, the traction body 801 is connected at one end near the originating well to a traction rope 10 for traction movement of the stabilizing mechanism 8, the inner chest plate 602, the cutter disc structure 2, the motor and the driving structure 3.
Or alternatively
The traction body 801 is provided with a traction movement stabilizing mechanism 8, an inner chest plate 602, a cutter disc structure 2, a motor and a back-off power mechanism of the driving structure 3, namely, the traction movement stabilizing mechanism 8 (traction trolley) is self-provided with power, a traction rope is not needed, and the traction movement stabilizing mechanism 8 provides back-off power.
Further, the second moving structure comprises a plurality of second wheels which can be propped against and clamped on the inner walls of the shield body structure and the pipe joint structure, or the second moving structure comprises a plurality of second sliding rails which can be propped against and clamped on the inner walls of the shield body structure and the pipe joint structure.
Further, as shown in fig. 12, the second wheel may or may not be mounted on the bottom surface of the traction body 801 of the movement stabilizing mechanism 8, and the second wheel may or may not be mounted on the top surface, the left side surface, and the right side surface of the traction body 801.
During the rollback operation, the inner breast board 602 is connected with the movable stabilizing mechanism 8 by adopting the connecting rod 9, the second wheels on each surface of the movable stabilizing mechanism 8 are respectively closely adhered to the inner walls of the shield body structure 1 and the pipe joint structure 11 to roll back, and the movable stabilizing mechanism 8 is tightly clamped in the tunnel, so that the cutting cutter disc structure 2, the motor, the driving structure 3 and the inner breast board 602 are connected with each other to form a whole, and the rolling back can not be performed.
The working method of the rollback heading machine comprises the following steps:
Step S1, tunneling a construction tunnel structure:
Constructing an originating well 14, lowering and installing a rollback heading machine in the originating well 14, excavating a stratum forwards by the rollback heading machine, and installing a pipe joint structure 11 to finish the tunneling construction of a tunnel structure;
specifically, an originating well 14 (originating working well, the bottom end of which is provided with an originating platform structure 13) is constructed, as shown in fig. 1, a retractable heading machine is lowered and installed in the originating well 14, a head pipe joint 112 is lowered and installed at the tail part of the retractable heading machine (i.e. near one end of the originating well 14), under the action of a pushing cylinder 12 (arranged in the originating well 14 and in the prior art), the retractable heading machine excavates a stratum forwards, and then a conventional pipe joint 111 is continuously lowered and installed until the retractable heading machine is jacked to the side wall of an arrival end (a receiving end main body structure 15), as shown in fig. 2, and the tunneling construction of the whole tunnel structure is completed.
Step S2, dismantling operation:
After the tunnel construction is completed, the spiral conveyor 4 and the shield tail direction-adjusting hinged oil cylinder 5 of the rollback heading machine are removed, and the connection structure between the internal device and the shield body structure 1 is removed;
the method specifically comprises the steps of removing the screw conveyor 4 and the shield tail direction-adjusting hinged oil cylinder 5, removing the connection structures between internal devices such as a motor and a driving structure 3 and the shield body structure 1, and removing equipment pipelines in the tunnel as shown in fig. 3 after the construction of the whole tunnel is completed.
Step S3, lowering the movable stabilizing mechanism 8:
as shown in fig. 3, the mobile stabilizer 8 is suspended from the initiation well 14 and the mobile stabilizer 8 is pushed into the pipe section structure 11 of the tunnel;
step S4, reducing the cutting cutterhead structure 2:
Folding or expanding the cutter disc structure 2 and rotating the cutter disc structure to a set position, and then fixing the cutter disc structure;
Specifically, as shown in fig. 4, the circular cutterheads are folded or stretched and fixed as required, and the specific operation content is that one or a plurality of spokes 203 of the two-side cutterhead 201 and the middle cutterhead 202 are folded according to the requirement of the back space, and the circular cutterhead is rotated to enable the folded or stretched spokes 203 to face the outer side of the shield structure 1, if the back space meets the requirement, the middle cutterhead 202 can not be folded and only needs to be rotated to a proper position, and after the circular cutterheads are folded or stretched and rotated to a proper position, the circular cutterheads are fixed.
Step S5, connecting the movable stabilizing mechanism 8 and disassembling the chest plate structure 6:
connecting the inner chest plate 602 with the movable stabilizing mechanism 8, then installing a jack 16 at the lower part of the inner chest plate 602, tightly jacking, removing the connection between the outer chest plate 601 and the inner chest plate 602, lowering the jack 16 to the first movable structure 7 at the bottom end of the inner chest plate 602 to be in contact with the bottom plate of the shield body structure 1, and removing the jack 16;
Specifically, as shown in fig. 4, an inner chest plate 602 is connected with a movable stabilizing mechanism 8 by a connecting rod 9, then a jack 16 is installed and tightly supported on the lower part of the inner chest plate 602, a connecting bolt between an outer chest plate 601 and the inner chest plate 602 is removed, the jack 16 is slowly lowered until a first wheel 701 (or a first sliding rail) at the bottom end of the inner chest plate 602 is fully contacted with the bottom plate of the shield structure 1, and the jack 16 is removed as shown in fig. 5;
Step S6, the rollback heading machine rolls back to the originating well 14:
Under the traction force of the movable stabilizing mechanism 8, the inner chest plate 602 drives the cutting cutterhead structure 2, the motor and the driving structure 3 after diameter change to retract to the starting well 14;
Specifically, a traction power device at one side of an originating well 14 is connected with a movable stabilizing mechanism 8 through a traction rope 10, and under the action of traction force, an inner chest plate 602 drives a folded cutting cutterhead structure 2, a motor and a driving structure 3 to retract to the originating well 14. Fig. 6 is a schematic diagram showing a state when the moving stabilization mechanism 8 of the present invention pulls each structure pulled thereon to retract from the shield structure 1 into the pipe joint structure 11, and the moving stabilization mechanism 8 continues to retract until all the structures retract to the originating well 14.
Step S7, hanging out the rollback heading machine:
the stabilization mechanism 8 to be moved, the inner chest plate 602, the cutting cutterhead structure 2 after diameter change, the motor and the driving structure 3 are integrally retracted to the starting well 14, and are respectively lifted out of the ground by a crane.
Thus, tunneling construction is completed, and rollback operation of the tunneling machine is completed.
When the invention is used for backing operation, only the screw conveyor and the shield tail are required to be adjusted to the hinged oil cylinder for detachment, and the inner chest plate 602, the cutting cutterhead structure 2 after diameter change, the motor and the driving structure 3 are pulled by the movable stabilizing mechanism 8 to realize integral backing, so that the backing operation procedure is relatively simple and efficient.
Embodiment 2A new subway station in a city is positioned below a main road of a busy urban area in a city center, a station main body structure is constructed by adopting a mechanical method, a straight section of a station entrance channel is constructed by adopting a pipe jacking method, and one side of the station main body is not provided with a condition for arranging a pipe jacking receiving well, so that the rollback tunneling machine is adopted, the rollback tunneling machine is jacked from one side far away from the station main body structure to one side of the station, and after the rollback tunneling machine is jacked to the station main body structure, the cutting cutterhead structure 2, the inner chest plate 602, the motor and the driving structure 3 are integrally rolled back to an originating well 14 and are hoisted out of the originating well 14.
By the above, the rollback heading machine and the operation method thereof have the following beneficial effects:
In the rollback tunneling machine, the breast board structure is a combined structure, the inner breast board and the peripheral breast board can be rapidly disassembled, the movable stabilizing mechanism can be clamped in the tunnel at the top and the bottom, the cutting cutter disc structure, the motor and the driving structure, and the inner breast board are connected with the movable stabilizing mechanism, and then the whole body can be stably rolled back to an originating well, the rollback operation is relatively simple, safe and efficient, and a receiving well is not required to be arranged.
The invention solves the problem that the current rectangular heading machine cannot be used because the receiving well cannot be arranged or is not suitable to be arranged, can not be arranged, expands the application scene of the rectangular heading machine, and has good economic benefit.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (6)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117328885A (en) * | 2023-10-09 | 2024-01-02 | 中铁工程装备集团有限公司 | Rollback pipe jacking tunneling machine |
| CN117386387A (en) * | 2023-11-06 | 2024-01-12 | 中铁工程装备集团有限公司 | Rollback heading machine and in-tunnel recombination starting method thereof |
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| JP4183040B2 (en) * | 2003-12-04 | 2008-11-19 | 株式会社小松製作所 | Method for retreating shield machine and jig for retreating shield |
| CN117569830A (en) * | 2023-12-29 | 2024-02-20 | 广州金土岩土工程技术有限公司 | Rollback type pipe jacking equipment and construction method thereof |
| CN118933816A (en) * | 2024-09-26 | 2024-11-12 | 中铁工程装备集团技术服务有限公司 | A long-distance retreat method for open TBM |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117328885A (en) * | 2023-10-09 | 2024-01-02 | 中铁工程装备集团有限公司 | Rollback pipe jacking tunneling machine |
| CN117386387A (en) * | 2023-11-06 | 2024-01-12 | 中铁工程装备集团有限公司 | Rollback heading machine and in-tunnel recombination starting method thereof |
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