阅读说明：本技术 一种tbm隧道超前预报采集装置 (TBM tunnel advance forecast collection system ) 是由 钱荣毅 宋翱 于 2019-10-18 设计创作，主要内容包括：一种TBM隧道超前预报采集装置,包括用于发出震源波的震源组件、用于检测震源回波的检测组件,以及用于对检测组件进行支撑固定的支撑组件,其中：支撑组件包括中心支架和若干个设置于中心支架一端的支撑臂,支撑臂通过轴承转动连接在中心支架上；检测组件位于支撑组件远离支撑臂的一端,本发明适用于隧道超前预报采集,通过采用平行于隧道掌子面且与隧道掌子面贴合的检测组件进行震源回波检测,摒弃了传统打孔探测的思路,解决了TBM类隧道对打孔布置震源和检波器使用的限制,减少对围岩管片的影响。(A TBM tunnel advance forecast acquisition device comprises a seismic source assembly for emitting seismic source waves, a detection assembly for detecting seismic source echoes, and a supporting assembly for supporting and fixing the detection assembly, wherein: the supporting component comprises a central bracket and a plurality of supporting arms arranged at one end of the central bracket, and the supporting arms are rotatably connected to the central bracket through bearings; the detection assembly is positioned at one end of the supporting assembly, which is far away from the supporting arm, the device is suitable for tunnel advanced prediction and acquisition, the detection assembly which is parallel to the tunnel face and is attached to the tunnel face is adopted for seismic source echo detection, the traditional drilling detection thought is abandoned, the limitation of the TBM tunnel on the use of a drilling arrangement seismic source and a detector is solved, and the influence on surrounding rock segments is reduced.)

1. The utility model provides a TBM tunnel advance forecast collection system which characterized in that: the device comprises a seismic source assembly for emitting seismic source waves, a detection assembly for detecting seismic source echoes, and a supporting assembly for supporting and fixing the detection assembly, wherein:

the supporting assembly comprises a central support and a plurality of supporting arms arranged at one end of the central support, and the supporting arms are rotatably connected to the central support through bearings;

the detection assembly is located at one end of the support assembly, which is far away from the support arm.

2. The device for acquiring advanced forecast of TBM tunnel according to claim 1, wherein: the detection assembly comprises a jacking piece and a detector, the jacking piece is arranged at one end, far away from the supporting arm, of the central support, the detector is arranged on the jacking piece, and the jacking piece is used for enabling the detector to be jacked and attached to the tunnel face.

3. The device for acquiring advanced forecast of TBM tunnel according to claim 2, wherein: the jacking part comprises a hydraulic cylinder and a fixing device, the fixing device comprises a workpiece sleeved with a bearing and a plurality of fixing rods, the fixing rods are distributed on the surface of the workpiece in a circular array mode, the bearing is further nested on a hydraulic rod port of the hydraulic cylinder, and the detector is vertically fixed on the surface of the fixing rods through bolts at equal intervals.

4. The device for acquiring advanced forecast of TBM tunnel according to claim 2, wherein: the top pressing piece comprises a spring and a fixing device, the fixing device comprises a workpiece and a plurality of fixing rods, the workpiece is sleeved with a bearing, the fixing rods are distributed on the surface of the workpiece in a circular array mode, the bearing is nested at one end of the central support, the spring is distributed on the surface of the fixing rods at equal intervals, and the detector is arranged on the spring.

5. The device for acquiring advanced forecast of TBM tunnel according to claim 1, wherein: one end of the supporting arm is provided with a bearing which is sleeved on the central support.

6. The device for acquiring advanced forecast of TBM tunnel according to claim 1, wherein: the supporting arm adopts a hydraulic rod for hydraulically adjusting the length, a push rod for electrically adjusting the length or a movable rod for manually adjusting the length.

7. The device for acquiring advanced forecast of TBM tunnel according to claim 1, wherein: the seismic source assembly comprises a mechanical arm and an impact seismic source, the impact seismic source is used for hammering a tunnel face to emit seismic source waves, the mechanical arm is of a multi-section structure, each section of structure is rotatably connected through a bearing, a hydraulic rod is arranged between each section of structure, on one hand, the hydraulic rod provides impact force for the impact seismic source, and on the other hand, the shape of the mechanical arm and the position of the impact seismic source are changed.

8. The device for acquiring the advanced forecast of the TBM tunnel according to any one of claims 1-7, wherein: and the bearing is provided with a positioning pin for limiting the rotation position of the bearing.

Technical Field

The invention belongs to the technical field of tunnel engineering, and particularly relates to a TBM tunnel advanced prediction acquisition device.

Background

The tunnel engineering is high-cost and high-risk hidden underground engineering, and before and during tunnel excavation, if bad geological structures such as karst, faults, broken zones and the like exist in a construction area, deformation and instability of surrounding rocks are easily caused, so that tunnel geological disasters such as tunnel collapse, water inrush and mud inrush, rockburst and the like are formed, and the property safety and the construction progress of personnel are greatly influenced. The tunnel geological advanced forecasting technology is a main means for reducing tunnel geological disasters, and the influence of bad geological bodies on tunnel construction safety is reduced by detecting the structure of a geological body in front of a tunnel before and during tunnel construction. The seismic detection technology is a main technology for the prior tunnel geological advanced prediction due to the large detection range and high detection precision. The design of the detection instrument meets the requirements of detection technology, and reasonable data acquisition equipment is the premise of realizing high-precision detection;

the existing data acquisition instrument used by the tunnel advanced prediction technology based on seismic exploration is designed for detecting the tunnel wall, and can realize high-precision data acquisition to a certain extent, however, due to the influence of the propagation rule of the tunnel seismic wave field, the seismic data acquisition instruments for detecting the tunnel wall such as TSP and the like need to arrange drill holes with certain depth on the tunnel wall in the using process, and need to perform sealing, grouting and other treatments on the drill holes, so that the construction process is complicated, the mode of explosive source excitation is high in cost, the test repeatability is poor, and the tunnel wall can be damaged to a certain extent; secondly, in the tunnel constructed by the shield, the shield segments are mostly adopted to complete supporting, drilling and drilling repairing treatment on the segments are difficult, and construction is complicated, so that the arrangement of the detecting instruments on the tunnel wall is limited; thirdly, the propagation rule of the tunnel seismic wave field shows that compared with the reflection information of the geologic body in front of the tunnel face of the tunnel received on the tunnel wall, the reflection information received on the face has larger data volume, higher reliability and higher data frequency, which is beneficial to imaging of the abnormal body, but at the present stage, no seismic instrument specially suitable for collecting the face data exists.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an advanced prediction acquisition device for a TBM tunnel.

In order to achieve the purpose, the invention adopts the following technical scheme:

a TBM tunnel advance forecast acquisition device comprises a seismic source assembly for emitting seismic source waves, a detection assembly for detecting seismic source echoes, and a supporting assembly for supporting and fixing the detection assembly, wherein:

the supporting assembly comprises a central support and a plurality of supporting arms arranged at one end of the central support, and the supporting arms are rotatably connected to the central support through bearings;

the detection assembly is located at one end of the support assembly, which is far away from the support arm.

Preferably, the detection assembly comprises a jacking piece and a detector, the jacking piece is arranged at one end, far away from the supporting arm, of the central support, the detector is arranged on the jacking piece, and the jacking piece is used for jacking and attaching the detector to the tunnel face.

Preferably, the jacking part comprises a hydraulic cylinder and a fixing device, the fixing device comprises a workpiece sleeved with a bearing and a plurality of fixing rods, the fixing rods are distributed on the surface of the workpiece in a circular array mode, the bearing is further nested on a port of a hydraulic rod of the hydraulic cylinder, and the detector is vertically fixed on the surface of the fixing rod at equal intervals through bolts.

Preferably, the jacking part comprises a spring and a fixing device, the fixing device comprises a workpiece sleeved with a bearing and a plurality of fixing rods, the fixing rods are distributed on the surface of the workpiece in a circular array mode, the bearing is nested at one end of the central support, the spring is distributed on the surface of the fixing rods at equal intervals, and the detector is arranged on the spring.

Preferably, one end of the supporting arm is provided with a bearing, and the bearing is sleeved on the central support.

Preferably, the supporting arm adopts a hydraulic rod for hydraulically adjusting the length, a push rod for electrically adjusting the length or a movable rod for manually adjusting the length.

Preferably, one end of the seismic source assembly is sleeved with a bearing, the bearing is sleeved on the central support, the seismic source assembly comprises a mechanical arm and an impact seismic source, the impact seismic source is used for hammering the face to generate seismic source waves, the mechanical arm is of a multi-section structure, the sections of the structure are rotatably connected through the bearing, a hydraulic rod is further arranged between the sections of the structure, on one hand, the hydraulic rod provides impact force for the impact seismic source, and on the other hand, the shape of the mechanical arm and the position of the impact seismic source are changed.

Preferably, the bearing is provided with a positioning pin for limiting the rotation position of the bearing.

According to the TBM tunnel advanced prediction acquisition device, the detection assembly which is parallel to the tunnel face and is attached to the tunnel face is adopted for detecting the seismic source echo, so that the real 3D reflection seismic data acquisition of abnormal bodies such as a fault and a broken zone in front of the tunnel face is realized, the problems of long time consumption and complex process of a conventional manual arrangement observation system are solved, the quick and accurate arrangement of a 3D observation system is realized, the detection cost is reduced, the detection repeatability is enhanced, the traditional drilling detection thought is abandoned, the limitation of TBM tunnels on the use of a drilling arrangement seismic source and a detector is solved, and the influence on surrounding rock segments is reduced;

the supporting arms in the supporting assembly can be adjusted in length, so that the device is suitable for tunnels with different sizes, and meanwhile, the supporting arms in the supporting assembly can be rotated on the central support to adjust the angle, so that the device can be adjusted in angle according to the actual internal conditions of the tunnels, and is convenient to support;

the detection assembly comprises a workpiece, a fixed rod and a detector, wherein the detector is fixed on the fixed rod, the fixed rod is rotatably arranged on the workpiece, so that the detection assembly can be folded and is convenient to carry when not in use, and the workpiece is rotatably arranged on the supporting assembly, so that the angle of the fixed rod can be changed by rotating the workpiece when the supporting position of the supporting assembly is not adjusted, the detection position of the detector is changed, and the detection data is more accurate due to the fact that the detection at different positions is carried out for multiple times.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an advanced prediction acquisition device for a TBM tunnel according to the present invention;

fig. 2 is a schematic view of a supporting arm structure in an embodiment 3 of the advanced prediction acquisition apparatus for a TBM tunnel according to the present invention;

FIG. 3 is a side view of a detection assembly in an embodiment 2 of the advanced prediction acquisition device for a TBM tunnel according to the present invention;

fig. 4 is a front view of a detection assembly in embodiment 2 of the advanced prediction acquisition device for a TBM tunnel according to the present invention.

Reference numerals: 1. a support assembly; 101. a central support; 102. a support arm; 2. a detection component; 201. a detector; 202. a jacking member; 3. a seismic source assembly; 301. a mechanical arm; 302. impacting a seismic source; 4. a first cavity; 5. a drive motor; 6. a partition plate; 7. a large arm; 8. a second cavity; 9. a screw rod sleeve; 10. a small arm; 11. a screw rod; 12. a hydraulic cylinder; 13. a workpiece; 14. and (5) fixing the rod.

Detailed Description

The following further describes a specific embodiment of the advanced prediction acquisition device for a TBM tunnel according to the present invention with reference to fig. 1. The advanced prediction acquisition device for the TBM tunnel is not limited to the description of the following embodiment.