CN214174639U - Airborne advanced geological prediction system applied to shield tunnel tunneling - Google Patents
Airborne advanced geological prediction system applied to shield tunnel tunneling Download PDFInfo
- Publication number
- CN214174639U CN214174639U CN202022935105.XU CN202022935105U CN214174639U CN 214174639 U CN214174639 U CN 214174639U CN 202022935105 U CN202022935105 U CN 202022935105U CN 214174639 U CN214174639 U CN 214174639U
- Authority
- CN
- China
- Prior art keywords
- processing module
- signal processing
- electrode
- shield
- dimensional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
The utility model provides an airborne advanced geological prediction system applied to shield tunnel tunneling, which consists of a three-dimensional induced polarization device and a three-dimensional earthquake testing device; the three-dimensional induced polarization device comprises a telescopic measuring electrode and a first signal processing module, wherein the telescopic measuring electrode is arranged on a cutter head panel and used for detecting a current signal of the shield surface and transmitting the current signal to the first signal processing module, and the first signal processing module is used for outputting a stratum water-containing structure in front of the shield surface; the three-dimensional earthquake testing device adopts mechanical vibration of the shield machine as a seismic source, and comprises a geophone and a second signal processing module, wherein the geophone is arranged on a shield tunnel tube sheet and used for receiving earthquake wave signals and transmitting the earthquake wave signals to the second signal processing module, and the second signal processing module is used for outputting the geological vibration condition in front of the shield face.
Description
Technical Field
The utility model belongs to advance geology forecast field especially relates to an airborne advance geology forecast system for shield tunnel tunnelling.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Due to the complex topographic and geological conditions and limited investigation technical means, the engineering geological conditions of the engineering area are difficult to be comprehensively and accurately mastered in the early construction period. Adverse geology such as faults, karst caves, broken rock masses and the like can be met in the tunnel construction process, serious geological disasters such as mud outburst, water inrush, collapse and the like are possibly generated, and serious consequences such as personal casualties, economic losses, construction period delay and the like are caused. The geological condition in front of the tunnel excavation face is detected, analyzed and forecasted, the construction process is improved, and the tunnel construction can be safely and smoothly promoted. In order to achieve the task of advanced geological prediction, different advanced detection methods appear in succession, the first method is advanced drilling, and the later nondestructive geophysical advanced detection technology appears and is already applied to a large number of engineering practices.
At present, the shield method has incomparable advantages of safe and quick construction, small influence on the surrounding environment and the like in the construction of urban central areas, becomes a preferred construction method for the construction of subway tunnel sections in recent years, and more tunnels are constructed by utilizing the shield machine. But the safe and efficient shield construction cannot be separated from the accurate geological exploration report. Due to the characteristics of large underground buried depth, deep drilling depth, heavy traffic in urban areas, standing buildings, individual refusal of surveying, narrow local street roads, dense underground pipelines, more underground buried objects and the like, geological surveying has the characteristics of high difficulty, high requirement, inaccurate issued survey reports and the like, and the advanced geological prediction technology is increasingly important for ensuring safe tunneling of the shield.
The observation space is almost completely occupied by the shield machine when the shield tunnel is excavated, so that the advanced forecasting method which is applied to a shallow-buried underground excavation method and a drilling and blasting method and is used for detecting by arranging equipment and instruments behind the tunnel face is difficult to implement, and meanwhile, the complex electromagnetic environment generated by a metal mechanical system also makes the detection method more difficult.
The inventor finds that at present, no reliable advanced geological prediction technology and equipment which can be applied to the shield machine exist, and under the condition of no prediction, the shield machine encounters unfavorable geology in the construction process, the tunneling speed is reduced, the construction period is delayed, and disastrous results such as serious social influence, secondary damage to the surrounding environment and the like are possibly brought.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one technical problem that exists among the above-mentioned background art, the utility model provides a be applied to shield tunnel tunnelling's machine carries advance geology forecast system, simple structure, safe and reliable, degree of automation are high, strong adaptability, and the forecast occupation time is short, and the testing result is accurate.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an airborne advanced geological prediction system applied to shield tunnel tunneling is composed of a three-dimensional induced polarization device and a three-dimensional earthquake testing device;
the three-dimensional induced polarization device comprises a telescopic measuring electrode and a first signal processing module, wherein the telescopic measuring electrode is arranged on a cutter head panel and used for detecting a current signal of the shield surface and transmitting the current signal to the first signal processing module, and the first signal processing module is used for outputting a stratum water-containing structure in front of the shield surface;
the three-dimensional earthquake testing device adopts mechanical vibration of the shield machine as a seismic source, and comprises a geophone and a second signal processing module, wherein the geophone is arranged on a shield tunnel tube sheet and used for receiving earthquake wave signals and transmitting the earthquake wave signals to the second signal processing module, and the second signal processing module is used for outputting the geological vibration condition in front of the shield face.
As an implementation manner, the first signal processing module and the second signal processing module are integrated in one upper computer.
As an implementation mode, the upper computer is respectively connected with the telescopic measuring electrode and the detector through the same host.
In one embodiment, each detector is connected with a communication cable, and the communication cable are combined into a multi-core cable to be connected to the host.
As an embodiment, the detectors are symmetrically arranged in axial groups at a set distance.
In one embodiment, the three-dimensional induced polarization device further comprises a telescopic power supply electrode, and the telescopic power supply electrode is connected with a constant current source.
As an embodiment, the telescopic power supply electrodes are arranged in two rings in the openings of the left and right side shields.
In one embodiment, the telescopic measuring electrode is further connected with an electrode driving device.
In one embodiment, the electrode drive is a hydraulic drive.
As an implementation mode, each telescopic measuring electrode is connected with two oil pipes and an electrode wire, the oil pipes are connected with the hydraulic driving mechanism, and the electrode wires are connected with the constant current source.
The utility model has the advantages that:
the utility model discloses a be applied to machine of shield tunnel tunnelling carries advance geology forecast system and has fused three-dimensional induced polarization device and three-dimensional earthquake testing arrangement together, and simple structure, safe and reliable, degree of automation are high, strong adaptability, do not influence the normal construction operation of shield structure machine, and the forecast occupation time is short, and the exploration result is accurate.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic structural diagram of an airborne advanced geological prediction system applied to shield tunneling according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the distribution position of the cutter head measuring electrode of the shield tunnel boring machine carried advanced geological prediction system according to the embodiment of the present invention;
fig. 3 is the utility model discloses shield tunnel entry driving machine carries advance geology forecast system electrode assembly sketch map.
Wherein, 1-surrounding rock; 2-palm surface; 3-cutter head; 4-shield; 5-a pipe piece; 6-telescoping measurement electrodes; 7-a telescopic power supply electrode; 8-electrode N; 9-electrode B; 10-a host machine; 11-an upper computer; 12-a demodulator probe; 13-a storage box; 14-a communication cable; 15-control cables; 16-a multi-core cable; 17-single core cable; 18-a three-dimensional induced polarization device; 19-a three-dimensional seismic testing device; 20-protective sleeve; 21-a guide sleeve; 22-a piston rod; 23-a hydraulic cylinder; 24-flange.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. 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 invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be fixedly connected, or may be integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.
Referring to fig. 1, the airborne advanced geological prediction system applied to shield tunneling according to the present embodiment is composed of a three-dimensional induced polarization device 18 and a three-dimensional seismic testing device 19.
Specifically, the three-dimensional induced polarization device 18 comprises a telescopic measuring electrode 6 and a first signal processing module, wherein the telescopic measuring electrode 6 is installed on a face plate of the cutter head 3 and used for detecting a current signal of the shield surface and transmitting the current signal to the first signal processing module, and the first signal processing module is used for outputting a water-containing structure of a stratum in front of the shield surface.
In a specific implementation, the three-dimensional induced polarization device 18 further comprises a telescopic power supply electrode 7, and the telescopic power supply electrode is connected with a constant current source.
It should be noted here that the constant current source structure is an existing structure, for example, the constant current source is composed of a main board, a constant current control module, an ac-dc voltage conversion module, an inverter module, a rectification module, and the like, and has the advantages of multipath parallelism, adjustable size, and stable output.
For example:
in the surrounding rock 1, a front panel of a cutter head 3 and a shield 4 are respectively provided with twelve telescopic measuring electrodes and a measuring ring telescopic power supply electrode through holes; electrode B9 was placed 100m behind the tunnel face and electrode N8 was placed 50m behind the tunnel face 2 and was mounted on tunnel segment 5 by punching during measurement; one of the two multi-core cables 16 is connected with twelve measuring electrodes, the other is connected with 8 power supply electrodes, and the two single-core cables 17 are respectively connected with the electrode B9 and the electrode N8.
Specifically, the telescopic electrode adopts a non-polarized coupling electrode, the telescopic movement of the electrode is realized by hydraulic driving, the electrode is arranged at the end of a piston rod 22 of a hydraulic cylinder 23 and is insulated from the piston rod 22, and a stainless steel protective sleeve 20 is arranged outside the electrode to protect the electrode. The pneumatic cylinder design is three layer construction, and the inlayer is hollow structure uide bushing, and uide bushing one end and the welding of flange 24 are in the instrument, form a body structure, and the intermediate level is hollow structure piston rod 22, and piston rod 22 all designs outward has sealedly. The measuring electrodes are arranged in round holes machined in the cutter head and limited by the cutter head structure, and the electrodes are approximately uniformly distributed. The power supply electrodes are arranged in the openings of the left and right side shields and are arranged in two rings.
In a specific implementation, the telescopic measuring electrode is also connected with an electrode driving device.
In this embodiment, the electrode driving device is a hydraulic driving mechanism.
Specifically, the back flange of each measuring electrode is connected with two oil pipes and an electrode wire, the oil pipes are connected in parallel, so that rod cavities and rodless cavities of twelve hydraulic cylinders are respectively communicated, and finally the two oil pipes and the twelve electrode wires are converged in a cutter head rotary joint and connected with the rear. The rotary joint is a four-way joint, one way supplies water, two ways supplies oil, and the other way supplies power. The oil supply line and the cable of the power supply electrode are connected to the rear in a fixed fashion. The measuring electrode hydraulic system and the power supply electrode hydraulic system belong to two loops which are mutually independent, and the combination control of an overflow valve, a pressure reducing valve and a speed regulating valve in the system can realize the slow extension and the fast retraction of the electrode.
It should be noted that, in other embodiments, the electrode driving device may be implemented by using other existing driving mechanisms.
In specific implementation, the three-dimensional earthquake testing device adopts mechanical vibration of a shield machine as a seismic source, and comprises a geophone and a second signal processing module, wherein the geophone is arranged on a shield tunnel duct piece 5 and used for receiving seismic wave signals and transmitting the seismic wave signals to the second signal processing module, and the second signal processing module is used for outputting the geological vibration condition in front of the shield surface.
The principle of the three-dimensional earthquake testing device is a three-dimensional earthquake method, a seismic source and a detector are arranged in a non-advanced space manner along the axis of a tunnel, so that the seismic source and the detector have different offset distances in 3 axial directions, transverse directions and vertical directions simultaneously, and the arrangement of a front-receiving and rear-source type is adopted, so that interference signals such as direct waves, rear reflected waves, tunnel cavities and the like can be effectively suppressed, the reflected waves of a tunnel face and a front lithologic interface are extracted, the wave velocity distribution and wave field information of unfavorable geology are accurately acquired, and the three-dimensional positioning of the unfavorable geology in front of the tunnel face is realized. And similarly, the method is carried out in a non-tunneling state of the shield tunneling machine, the detector is hidden in the cutter head and the shield tunneling machine during tunneling, and the detector extends out of the contact duct piece during forecasting so as to protect the electrode.
In the specific implementation, the geophone enables a receiving device of seismic wave signals to be arranged on a shield tunnel pipe sheet, a plurality of (for example: 12) geophone points 12 are designed at certain positions away from the face of a cutter head, and the geophone points are symmetrically arranged in six groups at set distance (for example: 4m) in an axial direction. A special storage box 13 is designed near each wave detection point and used for storing the wave detectors. When geological prediction is carried out, a laser positioning wave detection point is adopted, the end face of the wave detector is coated with a coupling agent and is adhered to a detection point of a tunnel segment, and the wave detector is withdrawn and stored in a storage box 13 after data acquisition is finished.
In this embodiment, the first signal processing module and the second signal processing module are integrated in one upper computer. The upper computer 11 is respectively connected with the telescopic measuring electrode and the detector through the same host 10. The upper computer 11 is connected with the host computer 10 through a control cable 15; the host 10 communicates with the detectors via a communication cable 14.
The first signal processing module and the second signal processing module can be implemented by using an existing processing chip of a programmable device such as a PLC.
The airborne advanced geological prediction system applied to shield tunneling of the embodiment integrates the three-dimensional induced polarization device and the three-dimensional earthquake testing device, has the advantages of simple structure, safety, reliability, high automation degree, strong adaptability, no influence on normal construction operation of a shield machine, short prediction occupation time and accurate detection result.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An airborne advanced geological prediction system applied to shield tunnel tunneling is characterized by comprising a three-dimensional induced polarization device and a three-dimensional earthquake testing device;
the three-dimensional induced polarization device comprises a telescopic measuring electrode and a first signal processing module, wherein the telescopic measuring electrode is arranged on a cutter head panel and used for detecting a current signal of the shield surface and transmitting the current signal to the first signal processing module, and the first signal processing module is used for outputting a stratum water-containing structure in front of the shield surface;
the three-dimensional earthquake testing device adopts mechanical vibration of the shield machine as a seismic source, and comprises a geophone and a second signal processing module, wherein the geophone is arranged on a shield tunnel tube sheet and used for receiving earthquake wave signals and transmitting the earthquake wave signals to the second signal processing module, and the second signal processing module is used for outputting the geological vibration condition in front of the shield face.
2. The system of claim 1, wherein the first signal processing module and the second signal processing module are integrated in an upper computer.
3. The system of claim 2, wherein the upper computer is connected to the telescopic measuring electrode and the detector through a same host.
4. The system of claim 2, wherein each detector is connected to a communication cable, and the detectors are combined into a multi-core cable and connected to the host.
5. The system of claim 1, wherein the receivers are symmetrically arranged in groups at a set distance in the axial direction.
6. The system of claim 1, wherein the three-dimensional induced polarization device further comprises a telescopic power supply electrode, and the telescopic power supply electrode is connected to a constant current source.
7. The system of claim 6, wherein the telescopic power supply electrodes are installed in the openings of the left and right shields in a two-ring arrangement.
8. The system of claim 6, wherein the flexible measurement electrode is further connected to an electrode driving device.
9. The system of claim 8, wherein the electrode driving device is a hydraulic driving mechanism.
10. The system of claim 9, wherein each of the flexible measure electrodes is connected to two oil pipes and an electrode wire, the oil pipes are connected to the hydraulic driving mechanism, and the electrode wire is connected to the constant current source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022935105.XU CN214174639U (en) | 2020-12-09 | 2020-12-09 | Airborne advanced geological prediction system applied to shield tunnel tunneling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022935105.XU CN214174639U (en) | 2020-12-09 | 2020-12-09 | Airborne advanced geological prediction system applied to shield tunnel tunneling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214174639U true CN214174639U (en) | 2021-09-10 |
Family
ID=77604814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022935105.XU Active CN214174639U (en) | 2020-12-09 | 2020-12-09 | Airborne advanced geological prediction system applied to shield tunnel tunneling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214174639U (en) |
-
2020
- 2020-12-09 CN CN202022935105.XU patent/CN214174639U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103713335B (en) | Comprehensive advance geological detection system carried by tunnel boring machine | |
| US20150233242A1 (en) | Comprehensive advanced geological detection system carried on tunnel boring machine | |
| CN203658603U (en) | Comprehensive advanced geological detection system carried by tunnel boring machine | |
| CN106094043A (en) | Transient electromagnetic method ground hole detection method and device | |
| CN111722278B (en) | Multi-wave site seismic detection method and system based on shield tunneling machine construction noise | |
| CN103075150B (en) | In-situ stress testing method of method for relieving stress in original hole site for multiple times | |
| CN110824568B (en) | Built-in focusing type electrical method water exploration system carried on shield tunneling machine cutter head and method | |
| JP2017156106A (en) | Tunnel face front survey method | |
| CN110221340A (en) | A kind of set of tunneling construction method for forecasting advanced geology | |
| CN111948645A (en) | Coal mine roadway and tunnel drilling while drilling radar advanced detection device and method | |
| CN105301645B (en) | A kind of shield construction method for forecasting advanced geology and system | |
| CN111335928B (en) | Horizontal geological survey arrangement method for deep-buried underground cave depot | |
| CN110837110B (en) | Seismic wave method advanced prediction auxiliary device and method suitable for TBM tunnel | |
| CN107884834A (en) | Homologous more transient electromagnetic detecting methods | |
| CN111983718B (en) | Remote advanced detection method for directional drilling and tunneling working face | |
| CN214174639U (en) | Airborne advanced geological prediction system applied to shield tunnel tunneling | |
| CN103630938A (en) | Imaging system and imaging method for well earthquake using hammer head of down-hole hammer as focus | |
| CN111158050B (en) | Data acquisition system and method and tunnel seismic wave advanced prediction method | |
| CN109738964B (en) | Tunnel prediction device, tunneling machine and method for seismic wave and electromagnetic wave joint inversion | |
| Ba et al. | Development status of digital detection technology for unfavorable geological structures in deep tunnels | |
| CN113740904B (en) | Advanced geological prediction method for giant span underground tunnel based on TSP detection | |
| CN110737017B (en) | Advanced forecasting and collecting device for coal roadway | |
| CN112433254A (en) | Method for exploring water disaster position of coal mine working face | |
| CN107797160A (en) | Elastic wave and Electromagnetic CT survey data Conjoint Analysis system and method | |
| CN206960672U (en) | A kind of wireless controlled passes the Tunnel prediction system of acceleration transducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |