Method for arranging and constructing an advance drill rig in a TBM girder

Abstract

The application discloses a kind of advance drill rig in TBM girder arrangement and construction method, main machine is provided with the inner cavity of main machine connected with cutter disc rear side, advance drill rig is arranged in the inner cavity of main machine, folding arm mechanism, slag chute and main machine belt conveyor, cutter disc rear side is provided with front support seat group, the girder of the inner cavity of main machine is provided with rear support seat group, advance drill rig is transferred between front support seat group and rear support seat group by folding arm mechanism support, in normal tunneling state, advance drill rig is fixedly connected on rear support seat group and is arranged away from cutter disc, the front end of slag chute and main machine belt conveyor is stretched out and is transported to tunneling rock-soil, in advance reinforcing operation state, advance drill rig is fixedly connected on front support seat group and carries out anchor rod reinforcing operation, the front end of slag chute and main machine belt conveyor is retracted.This arrangement and construction method, advance drill rig positioning installation process is simple, tunneling and anchor rod reinforcing operation state conversion is convenient, suitable for multidirectional, multi-angle advance reinforcing construction operation.

Description

Technical Field

[0001] This invention relates to the field of TBM tunnel construction, and in particular to a method for arranging and constructing an advanced drilling rig inside the main beam of a TBM. Background Technology

[0002] Currently, as an integrated mechanical equipment for tunnel construction, TBMs are increasingly being used in tunnel construction under complex geological conditions. When TBMs are excavating in sections with poor geological conditions, it is necessary to reinforce the surrounding rock at the tunnel face in advance to ensure construction safety.

[0003] To address this issue, a pre-installed interface for an advanced drilling rig is typically reserved in the TBM main unit area (behind the shield). When advanced drilling is required, the advanced drilling rig and piping system are temporarily installed, resulting in complex installation work and time-consuming process transitions. Due to the limited space in the TBM main unit area, the layout space for the advanced drilling rig is restricted, leading to a small operating range and low drilling efficiency. Furthermore, the main beam restricts the radial anchor bolt operation at the shield tail, failing to fully utilize its function. The space occupied by the shield and cutterhead also limits the current advanced reinforcement work to proceed from the shield tail forward, resulting in low timeliness, inability to promptly reinforce the surrounding rock at the tunnel face, poor reinforcement effectiveness, and safety hazards. In summary, existing conventional advanced drilling rig systems cannot meet the requirements, necessitating the development of related equipment and construction methods to improve construction safety, quality, and efficiency. Summary of the Invention

[0004] In response to this, the present invention provides a method for arranging and constructing an advanced drilling rig inside the main beam of a TBM, so that when encountering adverse geological conditions during tunnel excavation, the advanced drilling rig can be quickly switched to a new state, positioned, and grouted in a set direction to achieve rapid reinforcement of the tunnel face, thereby improving construction efficiency and reinforcement effect.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an advanced drilling rig arranged inside the main beam of a TBM, which is located within the inner cavity of the TBM main beam close to the cutterhead side. The main beam cavity is equipped with an advanced drilling rig, a folding arm mechanism, a chute, and a main machine conveyor belt. A front support assembly is provided on the back of the cutterhead, and a rear support assembly is provided on the side wall of the main beam cavity. The advanced drilling rig is detachably connected to the support assembly, and the advanced drilling rig is supported by the folding arm mechanism to move between the front support assembly on the back of the cutterhead and the rear support assembly on the side wall of the main beam cavity. The front ends of the chute and the main machine conveyor belt are retractably located within the main beam cavity. The advanced drilling rig, chute, and main machine conveyor belt are configured as follows: In normal tunneling, the advanced drilling rig is fixedly connected to the rear support assembly on the side wall of the main beam cavity and arranged away from the cutterhead, and the front ends of the chute and the main machine conveyor belt extend outward to transport the excavated muck. In advanced reinforcement operation, the advanced drilling rig is transferred to the front support assembly on the back of the cutterhead to perform drilling and grouting reinforcement operations, and the front ends of the chute and the main machine conveyor belt retract and are arranged away from the cutterhead.

[0006] Preferably, multiple advanced drilling rigs are provided, and each advanced drilling rig is equipped with a folding arm mechanism, which supports the movement between the front support group and the rear support group.

[0007] Preferably, the front support assembly comprises a plurality of supports and is spaced apart on the back surface of the cutter head, and at least a portion of the front support assembly is arranged opposite to each other along the radial direction of the cutter head.

[0008] Preferably, the advanced drilling rig is equipped with a drilling rig base, and the drilling rig base is equipped with a connecting part adapted to the front support seat group / rear support seat group. Furthermore, the ends of the radial anchor rods matched with the advanced drilling rig are nail head type, and the anchor rods within the working face area are made of glass fiber material.

[0009] Preferably, the articulated arm mechanism includes at least a first articulated arm and a second articulated arm, the first articulated arm and the second articulated arm are connected by a detachable hinge, and both the first articulated arm and the second articulated arm are provided with a connecting part that adapts to the front support group / rear support group.

[0010] To achieve the above objectives, in a second aspect, the present invention provides an advanced reinforcement construction method, comprising the following steps:

[0011] S100: In the TBM tunneling operation, the chute and the front end of the main machine belt conveyor extend forward and outward to output the excavated muck, and the advanced drilling rig moves backward away from the cutterhead and is supported and fixed by the rear support seat group.

[0012] S200: When encountering adverse geological conditions, the TBM cutterhead stops rotating, and the slag chute and main conveyor belt move backward and away from the cutterhead;

[0013] S300: The advanced drilling rig moves forward from the rear support group to the front support group on the back of the cutterhead via the folding arm mechanism, and the advanced drilling rig is supported and fixed by the front support group;

[0014] S400: The advanced drilling rig performs anchor bolt grouting to reinforce the surrounding rock through the gap between the cutterhead bucket or cutter seat;

[0015] S500: The drilling rig is driven by a rotating cutterhead to carry out anchor bolt grouting reinforcement construction in different areas around the tunnel;

[0016] S600: After the grouting reinforcement operation is completed, the advanced drilling rig is transferred from the front support group to the rear support group and fixed through the folding arm mechanism;

[0017] S700: Drive the chute and the front end of the main conveyor belt to move forward and get closer to the cutterhead, and the TBM resumes tunneling operations.

[0018] In the advanced reinforcement construction, preferably, the front and rear ends of the advanced drilling rig base are fixedly connected to the front support seat group arranged radially opposite to the back of the cutterhead, so that the advanced drilling rig is arranged perpendicular to the tunnel wall. The drilling rig performs radial anchor grouting reinforcement operation through the scraping hole or the reserved hole. After each radial anchor reinforcement operation is completed, the cutterhead is rotated to adjust the position of the drilling rig, so as to realize the radial anchor reinforcement operation at different positions in the ring.

[0019] In the advanced reinforcement construction, preferably, the front end of the advanced drilling rig base is hinged to one of the front support seats of the cutterhead, and the rear end is connected and fixed to another front support seat of the cutterhead through a support rod. The advanced drilling rig is in an oblique state with the working face, and the installed anchor rods extend obliquely relative to the front end face of the cutterhead to carry out oblique anchor grouting reinforcement work in the inclined direction. After each oblique anchor reinforcement work is completed, the cutterhead is rotated to adjust the position of the drilling rig, so as to realize oblique anchor reinforcement work at different positions in the circumference.

[0020] In the advanced reinforcement construction, preferably, a front support seat group is set on the front side of the cutterhead. The advanced drilling rig is transferred to the front side of the cutterhead through the manhole by the folding arm mechanism. The advanced drilling rig is fixed on the front support seat group on the front side of the cutterhead. The anchor rod extends outward perpendicular to the cutterhead to carry out axial anchor rod grouting reinforcement operation at the working face. After each axial anchor rod reinforcement operation is completed, the cutterhead is rotated to adjust the position of the drilling rig, so as to realize axial anchor rod reinforcement operation at different positions in the circumference.

[0021] Compared with existing technologies, the technical advantages of the advanced drilling rig layout and construction method provided by this invention are at least reflected in the following aspects:

[0022] Firstly, by installing an advanced drilling rig detachably connected to the cutterhead and main beam on the inner wall of the TBM main beam, and by installing a chute and main conveyor belt that can extend and retract, in the normal tunneling state, the advanced drilling rig is fixedly connected to the inner wall of the main beam, the cutterhead rotates to carry out tunneling operations, and the chute and main conveyor belt move forward to the cutterhead to transport the excavated muck; in the advanced reinforcement operation state, the chute and main conveyor belt retract away from the cutterhead, the advanced drilling rig is fixedly connected to the front support seat group on the back of the cutterhead, and anchor bolt grouting reinforcement operations are carried out. The above mechanism enables the advanced drilling rig to quickly switch between tunneling and advanced reinforcement states, realize the rapid reinforcement treatment of the tunnel face in TBM construction, reduce the workload of state transition, consume less time, facilitate timely handling of unreliable geological emergencies, and improve the safety of tunneling.

[0023] Secondly, by installing a folding arm mechanism within the main beam, with one end connected to the advanced drilling rig and the other end detachably connected to the front and rear support groups, the folding arm mechanism supports the advanced drilling rig when switching between tunneling and advanced reinforcement states. This allows for position transfer between the front support group on the cutterhead and the rear support group within the main beam. The folding arm mechanism facilitates the drilling rig's position transfer, making it more convenient and ensuring a smooth and orderly process. It reduces the labor intensity of construction workers, increases transfer speed, and is suitable for state transition operations of large-volume and heavy advanced drilling rigs within the confined space of the TBM main beam.

[0024] Thirdly, in the advanced reinforcement state, the drilling rig is rotated circumferentially by the rotation of the cutterhead, and the circumferential angle of the drilling rig is adjusted. Through multiple front support seats and folding arm mechanisms set at different positions on the back and front of the cutterhead, the advanced drilling rig can be arranged radially, obliquely, and axially in front of the cutterhead. It can carry out various anchor grouting reinforcement support methods such as radial advanced reinforcement, axial advanced reinforcement, and oblique advanced reinforcement according to geological characteristics. It meets the needs of advanced grouting reinforcement operations at different orientations and circumferential angles between the tunnel wall, the face in front of the cutterhead, and the tunnel wall and face on the oblique outer side of the cutterhead, and improves the ability of the device to cope with the diversity of geological changes during the tunneling process. Attached Figure Description

[0025] The present invention will be further described in detail herein with reference to the accompanying drawings and specific embodiments. The accompanying drawings, which are provided to further illustrate the invention and form part of this application, are illustrative embodiments of the invention and their descriptions are used to explain the invention, but do not constitute an undue limitation of the invention.

[0026] Figure 1 A first view of an embodiment of the provided advanced drilling rig arranged within the TBM main beam;

[0027] Figure 2 A second view of an embodiment of the provided advanced drilling rig arranged within the TBM main beam;

[0028] Figure 3 for Figure 1 A magnified partial schematic diagram at point C;

[0029] Figure 4 This is a schematic diagram of an embodiment of an advanced drilling rig;

[0030] Figure 5 A first-view schematic diagram of the advanced reinforcement operation status;

[0031] Figure 6 This is a second view diagram illustrating the advanced reinforcement work status;

[0032] Figure 7 A schematic diagram showing the status of inclined anchor bolt reinforcement work for advanced drilling rigs;

[0033] Figure 8 A schematic diagram showing the status of axial anchor bolt reinforcement work for advanced drilling rigs;

[0034] Figure 9 A flowchart illustrating an embodiment of the provided advanced reinforcement construction method.

[0035] Explanation of reference numerals in the attached diagram:

[0036] 1-Advanced drilling rig; 11-Anchor bolt; 12-Drilling rig base;

[0037] 2-Main beam;

[0038] 3- Folding arm mechanism, 31- First folding arm, 32- Second folding arm;

[0039] 4-Cutterhead;

[0040] 51 - Front support assembly, 52 - Rear support assembly;

[0041] 6-Slag chute;

[0042] 7-Main belt conveyor;

[0043] 8-Palm face. Detailed Implementation

[0044] When TBMs are excavating in areas with adverse geological conditions, it is necessary to pre-reinforce the surrounding rock at the tunnel face to ensure construction safety. Typically, an interface for installing a pre-drilling rig is reserved in the TBM main unit area. When pre-drilling is required, the pre-drilling rig and piping system are temporarily installed, resulting in complex installation work and time-consuming process transitions. Due to the limited space in the TBM main unit area, the placement space for the pre-drilling rig is restricted, leading to a small operating range and low drilling efficiency. Furthermore, the main beam restricts the radial anchor bolt operation at the shield tail, preventing the full utilization of the anchor bolt's function. Due to the space occupied by the shield and cutterhead, current pre-reinforcement generally proceeds from the shield tail forward, with the work point some distance from the tunnel face, making direct reinforcement of the face impossible. This results in low timeliness, failure to reinforce the surrounding rock in a timely manner, poor reinforcement effect, and impacts the safety of construction.

[0045] To address the aforementioned technical status quo and existing problems, this invention provides a method for arranging and constructing an advanced drilling rig within the main beam of a TBM. The advanced drilling rig is positioned close to the cutterhead side within the main beam. The main beam's inner cavity houses the advanced drilling rig, a folding arm mechanism, a chute, and a main conveyor belt. A front support assembly is located on the back of the cutterhead, and a rear support assembly is located on the side wall of the main beam's inner cavity. The advanced drilling rig is supported by the folding arm mechanism and moves between the front and rear support assemblies. In normal tunneling, the advanced drilling rig is fixedly connected to the rear support assembly and positioned away from the cutterhead. The front ends of the chute and the main conveyor belt extend outwards to transport excavated muck. In advanced reinforcement operation mode, the front ends of the chute and the main conveyor belt retract, and the advanced drilling rig is fixedly connected to the front support assembly for anchor bolt installation and grouting reinforcement operations.

[0046] When the provided TBM reaches a section with unfavorable geological conditions requiring pre-reinforcement, after the TBM stops, the muck chute and main conveyor belt are retracted. Using the folding boom mechanism, the pre-drilling rig is moved to a pre-selected fixed support. The rig is then installed on the fixed support, and the drill rod is passed through the gap in the bucket or cutterhead to pass through the cutterhead. The pre-drilling rig is then started to drill holes. After drilling is completed, the cutterhead is rotated to continue drilling the next hole. The tail of the rig can also be connected to the support on the cutterhead using a support rod, allowing the pre-drilling rig to be positioned at an angle, enabling angled pre-drilling construction. The positioning and installation process of the pre-drilling rig is simple, and the switching between tunneling and anchor bolt reinforcement operations is convenient, enabling multi-directional and multi-angle pre-reinforcement, effectively improving the safety and efficiency of tunnel construction.

[0047] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. In the description of the present invention, unless otherwise expressly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in the present invention in conjunction with the specific content of the technical solution; at the same time, without contradiction, the various technical solutions of the present invention can be freely combined, and the corresponding functions are manifested in the combination.

[0048] like Figures 1 to 8 As shown, an advanced drilling rig provided by the present invention is arranged inside the main beam of a TBM, including a main unit and a cutterhead 4. The cutterhead 4 is rotatably mounted at the front end of the main unit. The main unit has an internal cavity connected to the rear side of the cutterhead 4. The internal cavity of the main unit houses the advanced drilling rig 1, a folding arm mechanism 3, a slag chute 6, and a main unit conveyor belt 7. A front support assembly 51 is provided on the rear side of the cutterhead 4, and a rear support assembly 52 is provided on the main beam 2 of the main unit cavity. The advanced drilling rig 1 is detachably connected to the front support assembly 51 / rear support assembly 52. ​​The advanced drilling rig 1 is supported by the folding arm mechanism 3 and the front support assembly 51 and rear support assembly 52. The support assembly 52 is moved between each other; at least the front end of the chute 6 and the main conveyor belt 7 are retractably disposed within the inner cavity of the main machine; the advanced drilling rig 1, the chute 6 and the main conveyor belt 7 are configured such that: in the normal tunneling state, the advanced drilling rig 1 is fixedly connected to the rear support assembly 52 and arranged away from the cutterhead 4, and the front end of the chute 6 and the main conveyor belt 7 extends outward to transport the tunneling rock and soil; in the advanced reinforcement operation state, the advanced drilling rig 1 is fixedly connected to the front support assembly 51 to perform anchor bolt 11 reinforcement operation, and the front end of the chute 6 and the main conveyor belt 7 retracts and is arranged away from the cutterhead 4.

[0049] like Figure 9 As shown, further, based on the arrangement of the provided advanced drilling rig within the TBM main beam, this invention provides an advanced reinforcement construction method, which includes the following steps:

[0050] S100: In the TBM tunneling operation, the chute 6 and the front end of the main conveyor belt 7 extend forward and outward to output the tunneled rock and soil, and the advanced drilling rig 1 moves backward away from the cutterhead 4 and is supported and fixed by the rear support seat group 52.

[0051] S200: When encountering adverse geological conditions, the cutterhead 4 of the TBM stops rotating, and the slag chute 6 and the main conveyor belt 7 move backward and away from the cutterhead 4.

[0052] S300: The advanced drilling rig 1 is moved from the rear support group 52 to the front support group 51 through the folding arm mechanism 3, and the advanced drilling rig 1 is supported and fixed by the front support group 51.

[0053] S400: The anchor bolt 11 is passed through the gap between the bucket or the cutter head 4, and the advanced drilling rig 1 drives the anchor bolt 11 to perform anchor bolt 11 reinforcement work in the rock strata near the cutter head 4.

[0054] S500: After the anchor bolt 11 reinforcement work is completed, the folding arm mechanism 3 drives the advanced drilling rig 1 to move from the front support seat group 51 to the rear support seat group 52, and the advanced drilling rig 1 is supported and fixed by the rear support seat group 52.

[0055] S600: Drive the chute 6 and the front end of the main conveyor belt 7 to move forward and approach the cutterhead 4, and the TBM resumes tunneling operations.

[0056] Based on the above-described embodiments of the device and construction method, the advanced drilling rig arrangement and construction method within the TBM main beam provided by this invention utilizes a folding arm mechanism within the main machine cavity. One end of the folding arm mechanism is connected to the advanced drilling rig, while the other end is detachably connected to the front support assembly and the rear support assembly. The advanced drilling rig is moved between the front and rear support assemblies via the folding arm mechanism. In normal tunneling mode, the advanced drilling rig is fixedly connected to the rear support assembly of the main machine, the cutterhead rotates, and tunneling operations are performed. The chute and the main machine conveyor belt approach the cutterhead and transport the excavated soil and rock. In advanced reinforcement operation mode, the advanced drilling rig is fixedly connected to the front support assembly of the cutterhead, anchor bolt reinforcement operations are performed, and the chute and the main machine conveyor belt retract away from the cutterhead. This method can simultaneously perform both tunneling and advanced drilling functions. During tunnel excavation, when encountering adverse geological conditions, it can easily switch states, positioning the advanced drilling rig and performing reinforcement operations in a set direction. This allows for timely handling of unreliable geological emergencies, improving tunnel construction safety, efficiency, and quality.

[0057] In specific implementation, the advanced drilling rig 1 is equipped with a drilling rig base 12, and the drilling rig base 12 is equipped with a connecting part adapted to the front support seat group 51 / rear support seat group 52. The end of the anchor rod 11 matched with the advanced drilling rig 1 is nail head shaped, which can avoid the anchor rod from scratching the shield. The anchor rod 11 is made of fiberglass. Fiberglass anchor rods are used for axial anchor rod reinforcement construction at the tunnel face to avoid the anchor rod from damaging the cutter head and cutting tools during the tunneling process.

[0058] In some preferred embodiments, the articulated boom mechanism 3 includes at least a first articulated boom 31 and a second articulated boom 32, which are connected by a detachable hinge. The first articulated boom 31 and the second articulated boom 32 are respectively provided with connecting portions adapted to the front support assembly 51 and the rear support assembly 52. ​​This structural design of the articulated boom mechanism enables the support of the advanced drilling rig, facilitating position transfer of the advanced drilling rig between the front support assembly of the cutterhead and the rear support assembly of the main unit. The detachable hinged connection allows for the arbitrary selection of either the first articulated boom 31 or the second articulated boom 32, or both, as a support structure to support and fix the advanced drilling rig during advanced reinforcement operations. Similarly, during rig movement, either the first articulated boom 31 or the second articulated boom 32, or both, can be arbitrarily selected as a movement auxiliary structure. The above-described implementation method is more convenient and facilitates a smooth and orderly transfer. It not only reduces the labor intensity of construction personnel and improves the safety of the transfer process, but also effectively increases the speed of state transition and quickly handles unadjustable geology, thereby improving the safety of tunneling construction. It is especially suitable for special occasions such as the confined space of the main unit cavity and the heavy and bulky advanced drilling rig, meeting the construction needs of tunnel excavation.

[0059] like Figure 7 As shown, the first folding arm 31 of the provided folding arm mechanism is used to support the advanced drilling rig. Specifically, the front end of the advanced drilling rig 1 is hinged to one front support seat group 51 of the cutterhead 4, and the rear end is supported by the first folding arm 31 of the folding arm mechanism 3 and another front support seat group 51 of the cutterhead 4. The anchor rod 11 extends obliquely relative to the front end face of the cutterhead 4 to carry out the oblique anchor rod 11 reinforcement operation in the inclined direction. After each oblique anchor rod 11 reinforcement operation is completed, the cutterhead 4 is rotated to adjust the position of the drilling rig, so as to realize the oblique anchor rod 11 reinforcement operation in different positions, which is convenient for the rock strata anchoring operation in front of the cutterhead.

[0060] In some preferred embodiments, the front support assemblies 51 include multiple assemblies arranged at intervals on the rear side of the cutterhead 4, with at least a portion of the front support assemblies 51 arranged radially opposite each other along the cutterhead 4. Arranging multiple front support assemblies on the rear side of the cutterhead 4 provides versatility in selecting the fixed position of the drilling rig on the cutterhead, facilitating the adjustment of the pre-drilling rig's position on the cutterhead as needed. It also facilitates moving the pre-drilling rig from the main machine cavity to the cutterhead for support and fixation based on the angle of the cutterhead relative to the main machine, reducing the workload of transferring the pre-drilling rig and improving the speed of state transition.

[0061] like Figure 5 and Figure 6As shown, based on the above structure, the present invention provides a radial anchor bolt reinforcement method. Specifically, the advanced drilling rig is radially arranged on the rear side of the cutterhead, so that the anchor bolt extends outward from the radial side of the cutterhead. The specific construction method is as follows: the advanced drilling rig 1 is fixedly connected to the front end connecting seat arranged radially opposite to the rear side of the cutterhead 4, so that the anchor bolt 11 is arranged perpendicular to the tunnel wall. The anchor bolt 11 passes through the gap or reserved hole of the cutterhead 4 to carry out the radial anchor bolt reinforcement operation of the tunnel wall. After each radial anchor bolt 11 reinforcement operation is completed, the cutterhead 4 is rotated to adjust the position of the drilling rig to achieve radial anchor bolt reinforcement operations at different positions.

[0062] like Figure 8 As shown, in some preferred embodiments, a front support seat group 51 is provided on the front side of the cutterhead 4. The advanced drilling rig 1 is transferred to the front side of the cutterhead 4 through the manhole via the folding arm mechanism 3. The advanced drilling rig 1 is fixed on the front support seat group 51 on the front side of the cutterhead 4. The anchor rod 11 extends outward perpendicular to the cutterhead 4 to carry out axial anchor rod 11 reinforcement work on the face 8. After each axial anchor rod 11 reinforcement work is completed, the cutterhead 4 is rotated to adjust the position of the drilling rig, so as to realize the axial anchor rod 11 reinforcement work at different positions in the circumference.

[0063] The present invention provides a method for arranging and constructing an advanced drilling rig within the main beam of a TBM. Through the advanced drilling rig, folding arm mechanism, fixed supports, retractable chute, and retractable main conveyor belt, the method enables the routine arrangement of the advanced drilling rig. The positioning and installation process of the advanced drilling rig is simple and efficient, allowing for radial anchor bolt installation and axial advanced drilling at the tunnel face. This enables rapid reinforcement of the tunnel face during TBM-based tunnel construction, minimizing the workload and time required for state transitions. It facilitates timely handling of unreliable geological issues, improving tunneling safety. The method allows for various anchor bolt grouting reinforcement support methods, including radial, axial, and oblique advanced reinforcement, based on geological characteristics. This meets the needs of advanced grouting reinforcement operations at different orientations and circumferential angles between the tunnel wall, the tunnel face in front of the cutterhead, and the tunnel wall and tunnel face obliquely outward from the cutterhead, enhancing the device's ability to cope with diverse geological changes during tunneling.

[0064] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. The above drawings and specific embodiments are for illustrative purposes only, and this invention is not limited thereto. Minor modifications to this invention within the inventive spirit and scope defined by the claims of this invention all fall within the protection scope of this invention.

Claims

1. A pre-drilling rig structure arranged within the main beam of a TBM, comprising a main unit and a cutterhead (4), wherein the cutterhead (4) is rotatably disposed at the front end of the main unit, characterized in that: The main unit is provided with a main unit cavity connected to the rear side of the cutter head (4). The main unit cavity is provided with an advanced drilling rig (1), a folding arm mechanism (3), a slag chute (6) and a main unit belt conveyor (7). The cutter head (4) is provided with a front support seat assembly (51) on the rear side, and the main beam (2) of the main machine cavity is provided with a rear support seat assembly (52). The advanced drilling rig (1) is detachably connected to the front support group (51) / rear support group (52), and the advanced drilling rig (1) is supported by the folding arm mechanism (3) and moves between the front support group (51) and the rear support group (52). At least the front end portion of the slag chute (6) and the main conveyor belt (7) is retractably disposed within the inner cavity of the main machine; The advanced drilling rig (1), slag chute (6), and main conveyor belt (7) are configured as follows: In normal tunneling conditions, the advanced drilling rig (1) is fixedly connected to the rear support base group (52) and arranged away from the cutterhead (4). The front end of the chute (6) and the main conveyor belt (7) extends outward to transport the tunneling rock and soil. In the advanced reinforcement operation state, the advanced drilling rig (1) is fixedly connected to the front support seat group (51) to carry out the anchor bolt (11) reinforcement operation, and the front end of the chute (6) and the main machine belt conveyor (7) are retracted and arranged away from the cutter head (4). The articulated arm mechanism (3) includes at least a first articulated arm (31) and a second articulated arm (32), which are connected by a detachable hinge. The first articulated arm (31) and the second articulated arm (32) are respectively provided with a connecting part adapted to the front support seat assembly (51) / the rear support seat assembly (52).

2. The advanced drilling rig arrangement structure within the TBM main beam according to claim 1, characterized in that: Multiple advanced drilling rigs (1) are provided, and each advanced drilling rig (1) is configured with a folding arm mechanism, which supports the folding arm mechanism (3) and moves between the front support seat group (51) and the rear support seat group (52).

3. The advanced drilling rig arrangement structure within the TBM main beam according to claim 1 or 2, characterized in that: The front support assemblies (51) include a plurality of assemblies and are spaced apart on the rear side of the cutter head (4), and at least a portion of the front support assemblies (51) are arranged opposite each other along the radial direction of the cutter head (4).

4. The advanced drilling rig according to claim 1 or 2 is arranged inside the TBM main beam, characterized in that: The advanced drilling rig (1) is provided with a drilling rig base (12), and the drilling rig base (12) is provided with a connecting part adapted to the front support seat group (51) / rear support seat group (52).

5. The advanced drilling rig arrangement structure within the TBM main beam according to claim 1 or 2, characterized in that: The end of the anchor rod (11) of the advanced drilling rig (1) is nail head shaped, and the anchor rod (11) is made of fiberglass.

6. A construction method for arranging an advanced drilling rig within the main beam of a TBM, characterized in that, Construction using the TBM main beam internal arrangement structure provided by any one of claims 1 to 5 includes the following steps: S100: In the TBM tunneling operation, the front end of the chute (6) and the main conveyor belt (7) extends forward and outward to output the tunneled rock and soil, and the advanced drilling rig (1) moves backward away from the cutterhead (4) and is supported and fixed by the rear support seat group (52); S200: When encountering unfavorable geological conditions, the cutter head (4) of the TBM stops rotating, and the slag chute (6) and the main conveyor belt (7) move backward and away from the cutter head (4). S300: The advanced drilling rig (1) moves forward from the rear support seat group (52) to the front support seat group (51) through the folding arm mechanism (3), and the advanced drilling rig (1) is supported and fixed by the front support seat group (51); S400: The anchor bolt (11) is passed through the gap between the bucket or the cutter head (4), and the advanced drilling machine (1) drives the anchor bolt (11) to carry out anchor bolt (11) reinforcement work in the rock strata near the cutter head (4); S500: After the anchor bolt (11) reinforcement operation is completed, the folding arm mechanism (3) drives the advanced drilling rig (1) to move from the front support seat group (51) to the rear support seat group (52), and the advanced drilling rig (1) is supported and fixed by the rear support seat group (52). S600: Drive the front end of the chute (6) and the main conveyor belt (7) to move forward and get closer to the cutterhead (4), and the TBM resumes tunneling operation.

7. The construction method for arranging an advanced drilling rig within the TBM main beam according to claim 6, characterized in that: The advanced drilling rig (1) is fixedly connected to the front connecting seat arranged radially opposite to the rear side of the cutter head (4), so that the anchor rod (11) is arranged perpendicular to the tunnel wall. The anchor rod (11) passes through the gap or reserved hole of the cutter head (4) to carry out the radial anchor rod (11) reinforcement operation of the tunnel wall. After each radial anchor rod (11) reinforcement operation is completed, the cutter head (4) is rotated to adjust the position of the drilling rig, so as to realize the radial anchor rod (11) reinforcement operation at different positions.

8. The construction method for arranging an advanced drilling rig within the TBM main beam according to claim 6, characterized in that: The front end of the advanced drilling rig (1) is hinged to one of the front support seats (51) of the cutterhead (4), and the rear end is supported by the other front support seat (51) of the cutterhead (4) through the folding arm mechanism (3). The anchor rod (11) extends obliquely relative to the front end face of the cutterhead (4) to carry out the oblique anchor rod (11) reinforcement operation in the oblique direction. After each oblique anchor rod (11) reinforcement operation is completed, the cutterhead (4) is rotated to adjust the position of the drilling rig to realize the oblique anchor rod (11) reinforcement operation in different positions.

9. The construction method for arranging an advanced drilling rig within the TBM main beam according to claim 6, characterized in that: A front support seat group (51) is set on the front side of the cutter head (4). The advanced drilling machine (1) is transferred to the front side of the cutter head (4) through the manhole by the folding arm mechanism (3). The advanced drilling machine (1) is fixed on the front support seat group (51) on the front side of the cutter head (4). The anchor rod (11) extends outward perpendicular to the cutter head (4) to carry out the axial anchor rod (11) reinforcement operation of the face (8). After each axial anchor rod (11) reinforcement operation is completed, the cutter head (4) is rotated to adjust the position of the drilling machine to realize the axial anchor rod (11) reinforcement operation at different positions in the circumference.

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