CN111911163A - Conveying rod assembly, TBM airborne pilot drill visualization device and application method thereof - Google Patents
Conveying rod assembly, TBM airborne pilot drill visualization device and application method thereof Download PDFInfo
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- CN111911163A CN111911163A CN202010564510.7A CN202010564510A CN111911163A CN 111911163 A CN111911163 A CN 111911163A CN 202010564510 A CN202010564510 A CN 202010564510A CN 111911163 A CN111911163 A CN 111911163A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000012800 visualization Methods 0.000 title claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 78
- 238000003384 imaging method Methods 0.000 claims abstract description 76
- 239000000523 sample Substances 0.000 claims abstract description 39
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
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Abstract
The invention belongs to the technical field of tunneling, and relates to a conveying rod assembly, a TBM airborne pilot drill visualization device and an application method thereof. According to the device, the tunnel face advanced surrounding rock is drilled through a TBM airborne advanced drill; after drilling, pushing the probe and the conveying rod assembly into a TBM advanced drill hole through an advanced drill propulsion system to perform in-hole panoramic imaging, video recording, key part snapshot, drill hole track measurement and the like; the information detected by the probe is processed by an image editing processor in the imaging device host, and the processed result is displayed on a display, so that geological information such as hole wall cracks, cavities, aquifer water outlet positions, fault structures and the like in the full-length range of the TBM advanced drilling hole is obtained. The device and the application method thereof can realize qualitative and quantitative interpretation of surrounding rock lithology, stratum fracture tectonic zone, geological disasters and the like in front of a TBM tunneling face, and provide basis for imaging accurate identification.
Description
Technical Field
The invention belongs to the technical field of tunneling, and relates to a conveying rod assembly, a TBM airborne pilot drill visualization device and an application method thereof.
Background
With the continuous improvement of national economic level in China, the requirements of tunnel engineering construction quality and safety are also continuously increased, more and more hard rock tunnels are constructed by adopting a safer, more reliable and more rapid TBM construction method, and an advanced drilling machine randomly matched with the TBM plays an increasingly important role in advanced geological exploration of the tunnels. However, the existing advanced drilling machine which is randomly matched with the TBM only remains at the level of judging the mechanical parameters and manual experience of the drilling machine for judging and analyzing advanced geological drilling results, surrounding rock lithology, geological disasters and the like, and the imaging recognition of qualitatively and quantitatively judging the surrounding rock lithology and the geological disasters in front of the tunnel face cannot be realized. In addition, the mechanized operation detection method is still blank in use and is more and more limited by construction space and human cognition, and the traditional evaluation and judgment of TBM advanced drilling experience cannot meet the requirements of mechanized rapid and accurate construction of hard rock tunnels, especially tunnels under complex geological conditions.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a conveying rod assembly, a TBM airborne pilot drill visualization device and an application method thereof, wherein the TBM airborne pilot drill visualization device and the application method thereof provide a basis for qualitative and quantitative interpretation, imaging and accurate identification of the lithology of surrounding rock in front of a TBM tunneling face, a stratum fracture tectonic zone, geological disasters and the like, and have higher economic value and social value.
The purpose of the invention is solved by the following technical scheme:
in one aspect, the invention provides a conveying rod assembly, which comprises a plurality of sections of conveying rods, wherein cables are arranged inside the conveying rods, the ends of the adjacent conveying rods are connected through quick connectors, and the conveying rods are made of high-strength flexible composite materials.
As an optional or preferred embodiment, the high-strength flexible composite material is a graphite type composite material or a high-strength plastic steel material, and has better bending and rigidity.
As an alternative or preferred embodiment, the quick joint adopts a stainless steel quick joint in an European-style, and the quick joint is provided with a sealing gasket to meet the requirement of waterproof grade.
On the other hand, the invention provides a TBM airborne pilot drill visualization device, which comprises a drilling imaging device, wherein the bottom of a probe in the drilling imaging device is provided with the conveying rod assembly partially or completely, and the drilling imaging device is carried on a rock drill of the TBM airborne pilot drill; the probe extends into a TBM advanced borehole to carry out in-hole panoramic shooting, and is connected with an imaging device host in a borehole imaging device through a cable; an image editing processor in the imaging device host machine processes the drilling information detected by the probe and displays the processed result on a display; the imaging device host and the display are integrated in the TBM main control room.
Further, a communication module is further arranged in the imaging device host, the imaging device host is communicated with a TBM communication system through the communication module, and the TBM communication system is used for realizing remote sharing of a drilling imaging process and real-time transmission of detection results.
Further, the imaging device host is connected with a depth encoder, and the depth encoder has better protection grade and depth measurement precision, and the depth measurement precision is less than 0.1 mm.
Further, the drilling information comprises information such as in-hole panoramic imaging, video recording, key part snapshot, drilling track measurement and the like.
In another aspect, the invention further provides an application method of the TBM airborne pilot drill visualization device, which comprises the following steps:
1) a TBM onboard advanced drill drills the tunnel face advanced surrounding rock;
2) pushing the probe and the conveying rod assembly into a TBM advanced drill hole through a propelling system of the TBM onboard advanced drill so as to detect drilling information;
3) an image editing processor in the imaging device host processes the detected information and displays the processed result on a display.
Further, the step 2) specifically comprises:
when the TBM advanced drill hole is visually detected, the original drill rod of the rock drill is detached, and the probe is connected with the conveying rod assembly and then installed on a propelling beam of the TBM airborne advanced drill;
the method comprises the following steps that a probe and a conveying rod assembly are pushed into surrounding rocks in a TBM advanced drilling hole to be detected through the thrust of a rock drill to detect, and the conveying rod assembly is used for achieving the requirements of detection and movement of the probe in the TBM advanced drilling hole.
Further, the application method further comprises the following steps:
4) the full process and image storage of high-definition screen display detection in the TBM main control room are realized through the TBM communication system, and remote sharing of the drilling imaging process and real-time transmission of detection results are realized.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the conveying rod component is made of high-strength flexible composite materials and has good bending and rigidity; each section of the transmission rod ensures electrification and signal transmission through a cable, is convenient and quick to install and has better bending and rigidity; the probe comprises a centering device, can freely advance and retreat in the hole under the matching of the transmission rod, is not easy to clamp the rod particularly for the transmission of upward, horizontal or angular drilling, and has strong operability.
On the other hand, the TBM onboard advanced drilling visualization device is characterized in that a drilling imaging device is installed on the existing TBM, a probe in the drilling imaging device extends into a TBM advanced drilling hole through a conveying rod assembly to perform in-hole panoramic imaging and video recording, key part snapshot, drilling track measurement and other actions, and after the actions are processed and analyzed by an image editing processor in a drilling imaging device host, geological information such as hole wall cracks, cavities, aquifer water outlet positions and fault structures in the full-length range of the TBM advanced drilling hole is obtained, so that basis is provided for qualitative and quantitative interpretation and imaging accurate identification of the lithology, stratum crack structure zones, geological disasters and the like of surrounding rocks in front of a TBM tunneling working face, and the defects and limitations that the existing TBM onboard advanced drilling machine can only drill holes and cannot perform qualitative and quantitative interpretation and imaging accurate identification on the surrounding rocks of a drilling machine are overcome.
In addition, the application method of the TBM airborne pilot drilling visualization device integrates the drilling imaging principle and applies the drilling imaging principle to the TBM pilot drilling process, and geological information such as hole wall cracks, cavities, aquifer water outlet positions, fault structures and the like in the full-length range of TBM pilot drilling can be acquired.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic view of the construction of a transfer bar assembly provided by the present invention;
fig. 2 is a schematic structural diagram of a TBM airborne pilot drill visualization device provided by the present invention;
fig. 3 is a connection block diagram of the TBM airborne pilot drill visualization device provided by the present invention.
Wherein: 1. TBM airborne pilot drilling; 2. TBM advanced drilling; 3. an image forming apparatus host; 4. a probe; 5. a display; 6. a transfer rod; 7. a quick-acting coupling; 8. a cable; 9. a high-definition camera; 10. a centering device; 11. an image editing processor; 12. a communication module; 13. a TBM communication system; 14. drilling hole walls; 15. TBM control chamber.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus, methods consistent with certain aspects of the invention, as detailed in the following claims.
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
Examples
Referring to fig. 1, the invention provides a conveying rod assembly, which comprises a plurality of sections of conveying rods 6, wherein cables 8 are arranged inside the conveying rods 6, the ends of adjacent conveying rods 6 are connected through quick connectors 7, and the conveying rods 6 are made of high-strength flexible composite materials.
As an optional or preferred embodiment, the high-strength flexible composite material is a graphite type composite material or a high-strength plastic steel material, and has better bending and rigidity.
Alternatively or preferably, the quick coupling 7 is made of stainless steel in the form of an Oldham coupling, and the quick coupling 7 is self-sealing and meets the requirement of waterproof grade.
Further, the body of rod length of single conveying pole 6 is 1m ~ 3m and varies, and the both ends of every section conveying pole 6 are provided with quick-operation joint 7, realize electrically conductive intercommunication and information transmission after every section conveying pole 6 of conveying pole subassembly is installed fast, and the head and the probe 4 of conveying pole subassembly are connected, and the data transmission line of conveying pole subassembly afterbody passes through cable 8 and is connected with imaging device host computer 3 in the TBM control room 15.
Referring to fig. 2-3, the invention provides a TBM airborne pilot drill visualization device, which comprises a drilling imaging device, wherein the drilling imaging device is carried on a rock drill of an airborne pilot drill 1, and the drilling imaging device comprises an imaging device host 3; the imaging device host 3 is connected with probe 4, display 5 respectively, probe 4 is connected with imaging device host 3 through cable 8, the bottom installation of probe 4 is as above some or whole the transfer bar subassembly, probe 4 stretches into TBM advanced drilling 2 and carries out downthehole panorama and makes a video recording under the effect of transfer bar subassembly, image editing processor 11 in the imaging device host 3 handles the drilling information that probe 4 detected to the result after will handling shows on display 5, imaging device host 3 all integrate in TBM main control room 15.
Further, a communication module 12 is further arranged in the imaging device host 3, and the imaging device host 3 is communicated with the TBM communication system 13 through the communication module 12, so that remote sharing of a drilling imaging process and real-time transmission of detection results are achieved.
Further, the imaging device host 3 is connected with a depth encoder, and the depth encoder has better protection grade and depth measurement precision, and the depth measurement precision is less than 0.1 mm.
Further, the drilling information comprises information such as imaging and video recording of the whole hole wall in the hole, snapshot of key parts, measurement of drilling track, distinguishing of various geological structures such as ore bodies, rock bodies, soil bodies and interlayers and observation of fault fracture occurrence and development conditions.
Further, a high-definition camera 9, a three-dimensional compass and a centering device 10 are installed in the probe 4, and the probe 4 is connected with a drilling imaging device through a cable 8; wherein, high definition digtal camera 9 has high protection level, disposes three-dimensional compass, and the diameter of probe 4 matches wantonly according to the drilling diameter size, and high definition digtal camera 9 can advance and retreat freely at drilling pore wall 14 under the combined action of conveying pole subassembly and ware 10 placed in the middle, especially upwards, the conveying of level or area angle drilling, difficult card pole, and the operability is strong, and 360 degrees panorama formation of image of level can be realized to probe 4, need not the focusing.
Further, the image editing processor 11 in the imaging device host 3 is used for calculating, storing and analyzing the detected drilling information, the image editing processor 11 has the functions of editing, processing and analyzing the full-hole-wall imaging image, the imaging device host system is integrated into the TBM control room 15, the TBM communication system 13 is used for realizing the full process and image storage of high-definition screen display detection in the TBM main control room 15, and remote sharing of the drilling imaging process and real-time transmission of the detection result are realized.
Furthermore, the TBM airborne pilot drill visualization device can observe positions of water-bearing fault, a karst cave, a water-bearing stratum water outlet and the like of the TBM pilot drill 2, and measure thickness, width, trend, inclination and the like of a stratum or various structures from an imaging plane diagram; the method can also be used for observing and quantitatively analyzing the trend, thickness, inclination and inclination angle of the rock stratum, the degree of separation cracks between the rock stratum and the top plate rock stratum, the gangue in the rock stratum, the occurrence of the rock (soil) layer, the fault structure in front of the working surface, the water diversion fractured zone of the overlying rock stratum and the like of the surrounding rock in front of the TBM working surface. The borehole imaging device is suitable for detecting boreholes with various shapes and functions, such as horizontal holes, vertical holes, inclined holes and the like, of the TBM advanced borehole 2; such as harmful gas holes, water exploration holes, geological exploration holes and the like.
In conclusion, the TBM airborne pilot drill visualization device provided by the invention is realized by two parts, namely the TBM airborne pilot drill 1 and the drilling imaging device, the TBM airborne pilot drill 1 realizes drilling in all directions of a tunnel excavation pilot working face, and the drilling imaging device acquires geological information such as hole wall cracks, cavities, aquifer water outlet positions, fault structures and the like in the full-length range of the TBM pilot drill 2 through the probe 4, the imaging device host 3 and the like, so that a basis is provided for qualitative and quantitative interpretation and imaging accurate identification of surrounding rock lithology, stratum crack structure zones, geological disasters and the like in front of a TBM excavation face. The specific working process of the whole device is as follows:
firstly, a TBM (tunnel boring machine) onboard advanced drill 1 drills a tunnel face advanced surrounding rock; after drilling, carrying a probe 4 of a drilling imaging device on a rock drill on a TBM airborne pilot drill 1, pushing a transmission rod 6 into the TBM airborne pilot drill 2 by using the rock drill of the TBM airborne pilot drill 1 to perform actions such as panoramic imaging and video recording in a hole, capturing a key part, measuring a drilling track and the like, and continuously lengthening the transmission rod component in the pushing process; finally, the drilling information detected by the probe 4 is processed by the image editing processor 11 of the imaging device host 3 and analyzed by analysis software, and then is displayed on the display 5 of the TBM main control room 15, so that geological information such as hole wall cracks, cavities, aquifer water outlet positions, fault structures and the like in the full-length range of the TBM advanced drilling hole 2 is obtained, and the basis is provided for qualitative and quantitative interpretation and imaging accurate identification of surrounding lithology, stratum crack structure zones, geological disasters and the like in front of the TBM tunneling face.
In addition, the invention also provides an application method of the TBM airborne pilot drill visualization device, which comprises the following steps:
1) the TBM airborne pilot drill 1 drills a tunnel face pilot surrounding rock;
2) pushing a probe 4 and a transmission rod assembly of the TBM airborne pilot drill visualization device into a TBM pilot drill hole 2 through a propelling system of a TBM airborne pilot drill 1 to detect drilling information;
3) the processing and analyzing unit in the imaging apparatus main body 3 processes the detected information and displays the processed result on the display 5;
4) the full process of high-definition screen display detection and image storage in the TBM main control chamber 15 are realized through the TBM communication system 13, and remote sharing of the drilling imaging process and real-time transmission of detection results are realized.
Further, the step 2) specifically comprises:
when the TBM advanced drill 2 is visually detected, the original drill rod of the rock drill is detached, and the probe 4 is connected with the conveying rod assembly and then arranged on a propelling beam of the TBM airborne advanced drill 1;
the surrounding rock in the TBM advanced borehole 2 to be detected is pushed into the probe 4 and the conveying rod assembly through the thrust of the rock drilling machine for detection, and the conveying rod assembly is used for achieving the requirements of detection and movement of the probe in the TBM advanced borehole 2.
Therefore, the application method of the TBM airborne pilot drill visualization device integrates and carries the drilling imaging device and the auxiliary system on the TBM, and the tunnel face pilot surrounding rock is drilled through the TBM airborne pilot drill 1; after drilling, pushing the probe 4 and the transmission rod assembly into the TBM advanced drilling hole 2 through an advanced drilling propulsion system to perform in-hole panoramic imaging, video recording, key part snapshot, drilling track measurement and the like; the information detected by the probe 4 is processed by an image editing processor 11 in the imaging device host 3, and the processed result is displayed on a display 5, so that geological information such as hole wall cracks, cavities, aquifer water outlet positions, fault structures and the like in the full-length range of the TBM advanced drilling 2 is obtained; meanwhile, the TBM communication system 13 can realize the whole process of displaying the probing hole by the high-definition screen of the display 5 in the TBM control room 15, and realize the remote sharing of the drilling imaging process and the result and the real-time transmission of the probing result.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A conveying rod assembly comprises a plurality of sections of conveying rods (6), and is characterized in that cables (8) are arranged inside the conveying rods (6), ends of the adjacent conveying rods (6) are connected through quick connectors (7), and the conveying rods (6) are made of high-strength flexible composite materials.
2. The conveyor bar assembly of claim 1, wherein said high strength flexible composite material is a graphite type composite material or a high strength plastic steel material.
3. The transfer bar assembly according to claim 1, wherein the quick coupling (7) is a stainless steel quick coupling of the eustachian type.
4. A TBM onboard advanced drill visualization device, comprising a drilling imaging device, characterized in that the bottom of a probe (4) in the drilling imaging device is provided with a conveying rod assembly according to any one of claims 1-3, and the drilling imaging device is carried on a rock drill of the TBM onboard advanced drill (1); the probe (4) extends into a TBM advanced borehole (2) to carry out in-hole panoramic shooting, and the probe (4) is connected with an imaging device host (3) in a borehole imaging device through a cable (8); an image editing processor (11) in the imaging device host (3) processes the drilling information detected by the probe (4) and displays the processed result on a display (5); the imaging device host (3) and the display (5) are integrated in the TBM main control room (15).
5. The TBM airborne pilot drill visualization device according to claim 4, wherein a communication module (12) is arranged in the imaging device host (3), the imaging device host (3) is communicated with a TBM communication system (13) through the communication module (12), and the TBM communication system (13) is used for realizing remote sharing of a drilling imaging process and real-time transmission of detection results.
6. The TBM airborne pilot drill visualization device according to claim 4, characterized in that the imaging device host (3) is connected with a depth encoder, the accuracy of which is less than 0.1 mm.
7. The TBM airborne pilot drill visualization device according to claim 4, wherein the drilling information comprises information about in-hole panoramic imaging, video recording, key part snapshot, and drilling track measurement.
8. An application method of a TBM airborne pilot drill visualization device is characterized by comprising the following steps:
1) a TBM (tunnel boring machine) carries out drilling on the tunnel face advanced surrounding rock by using an advanced drill (1);
2) pushing a probe (4) and a conveying rod assembly into a TBM advanced drill hole (2) through a propelling system of the TBM onboard advanced drill (1) to detect drilling information;
3) an image editing processor (11) in the imaging apparatus main body (3) processes the detected information and displays the processed result on a display (5).
9. The application method according to claim 8, wherein the step 2) specifically comprises:
when the TBM advanced drill (2) is visually detected, the original drill rod of the rock drill is detached, and the probe (4) is connected with the conveying rod assembly and then installed on a propelling beam of the TBM airborne advanced drill (1);
will through rock drill thrust will probe (4) and conveying rod subassembly push into the wall rock in the TBM advance borehole (2) of treating surveying and survey, the conveying rod subassembly is used for realizing the needs that probe (4) surveyed and remove in TBM advance borehole (2).
10. The application method according to claim 8, characterized in that it further comprises the steps of:
4) the full process of high-definition screen display detection and image storage in a TBM main control room (15) are realized through a TBM communication system (13), and remote sharing of a drilling imaging process and real-time transmission of detection results are realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010564510.7A CN111911163A (en) | 2020-06-19 | 2020-06-19 | Conveying rod assembly, TBM airborne pilot drill visualization device and application method thereof |
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| CN202010564510.7A CN111911163A (en) | 2020-06-19 | 2020-06-19 | Conveying rod assembly, TBM airborne pilot drill visualization device and application method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761517A (en) * | 2021-02-08 | 2021-05-07 | 中交路桥建设有限公司 | Construction method for improving geological exploration efficiency of tunnel advanced exploration hole |
| WO2024104640A1 (en) * | 2022-11-17 | 2024-05-23 | Herrenknecht Aktiengesellschaft | Tunnel boring machine |
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| CN103713335A (en) * | 2014-01-07 | 2014-04-09 | 山东大学 | Comprehensive advance geological detection system carried by tunnel boring machine |
| CN203658603U (en) * | 2014-01-07 | 2014-06-18 | 山东大学 | Comprehensive advanced geological detection system carried by tunnel boring machine |
| CN204086567U (en) * | 2014-07-29 | 2015-01-07 | 山东大学 | Resistivity Tomography device and system between horizontal drilling |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761517A (en) * | 2021-02-08 | 2021-05-07 | 中交路桥建设有限公司 | Construction method for improving geological exploration efficiency of tunnel advanced exploration hole |
| WO2024104640A1 (en) * | 2022-11-17 | 2024-05-23 | Herrenknecht Aktiengesellschaft | Tunnel boring machine |
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