CN105604557A - Shield construction boulder detection method based on seismic CT - Google Patents
Shield construction boulder detection method based on seismic CT Download PDFInfo
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- CN105604557A CN105604557A CN201511017131.1A CN201511017131A CN105604557A CN 105604557 A CN105604557 A CN 105604557A CN 201511017131 A CN201511017131 A CN 201511017131A CN 105604557 A CN105604557 A CN 105604557A
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- hole
- shield
- drilled
- boulder
- receiver
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- 238000010276 construction Methods 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 238000013170 computed tomography imaging Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000013480 data collection Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 abstract description 3
- 230000005641 tunneling Effects 0.000 abstract 4
- 238000000034 method Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
Classifications
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A shield construction boulder detection method based on seismic CT comprises the following steps: laying a first drilled passage group and a second drilled passage group on a cutterhead of a shield tunneling machine; in a shield construction tunnel, drilling a transmitting hole and receiving holes being the same as the transmitting hole in length at the front part of the cutterhead of the shield tunneling machine; exciting a transmitter in the transmitting hole, conducting multipoint receiving via a plurality of receivers in the receiving holes, conducting seismic CT imaging, collecting and processing seismic waveform data, drawing a velocity profile, and judging whether a boulder exists or not through the velocity profile. The shield construction boulder detection method is simple in steps and convenient to operate; seismic CT imaging is conducted in front of the shield tunneling machine, the distances between the transmitter to the receivers are short, the movement distances are small, the resolution ratio is high, and the boulder in front of shield construction can be effectively detected; drilling imaging is conducted at the place, where the boulder possibly exists, in front of the shield tunneling machine, the pertinence is strong, invalid construction can be avoided, and the construction cost is obviously reduced.
Description
Technical field
The present invention is specifically related to a kind of shield-tunneling construction boulder detection method based on earthquake CT.
Background technology
In coastal areas of southern China area, to carry out in subway shield tunnel construction and often run into boulder, it is by graniteUneven weathered the weathering core under residual. Boulder may bring major safety risks, must be at shield machineBefore construction, verify. Probing and geophysical prospecting method are to survey the important means of boulder, and two class methods are conventionally all on groundTable carries out, and by drilling through multiple boring at shield-tunneling construction tunnel upper, carries out vertical development examination, determinesPosition, shape and the size of boulder, then carry out deep hole blasting. Taking to survey boulder at surface drilling depositsIn serious problems, not only require drilling hole amount many, and be easily subject to the limit of the condition such as building, pipelineSystem, adopts in rivers that vertical drilling cost is high, complex process, and find to be difficult to after boulder accurately fixedPosition, finally has influence on demolition effect.
Summary of the invention
The technical problem to be solved in the present invention, is to provide a kind of shield-tunneling construction boulder based on earthquake CTDetection method.
The present invention is achieved in that a kind of shield-tunneling construction boulder detection method based on earthquake CT, bagDraw together following steps:
(1) cloth hole on cutter head of shield machine: lay the first drilled tunnel group and second on cutter head of shield machineDrilled tunnel group; Described the first drilled tunnel group is positioned at the inside of the second drilled tunnel group, this first boringPassage group comprises three the first drilled tunnels, and described three the first drilled tunnels are evenly distributed on cutterheadCenter is on the round C1 in the center of circle; Described the second drilled tunnel group comprises six the second drilled tunnels, and instituteStating six the second drilled tunnels is evenly distributed on the round C2 taking cutterhead center as the center of circle;
(2) shield machine front boring: in shield-tunneling construction tunnel, logical by the boring of first on cutterheadRoad and the second drilled tunnel, adopt sleeve pipe retaining wall, with leading rig by backward front in cutter head of shield machine frontDrill through 9 exploration holes that length is identical, and the length of exploration hole is greater than between described round C1 and circle C2Spacing; The corresponding exploration hole of described the first drilled tunnel is launch hole, and the second drilled tunnel institute is correspondingExploration hole be receiver hole;
(3) earthquake CT imaging: a transmitter is fixed on to a first hollow metallic rod top, theOne metallic rod top is stretched in a launch hole, and the afterbody of this first metallic rod is inserted in the first brill of cutterheadIn hole path; By a plurality of receivers interval and be evenly fixed in hollow second metallic rod secondMetallic rod stretches in receiver hole corresponding to the part of receiver, and the afterbody of the second metallic rod is inserted in cutterheadThe second drilled tunnel; Described transmitter is all connected with a host computer by cable with receiver;
Transmitter in excitation-emission hole, carries out multipoint reception by a plurality of receivers in receiver hole; Wherein,1 group of receiver is installed respectively in 6 receiver holes simultaneously, is received observation simultaneously; Or by 6 receptionsHole receives observation in batches; After completing and once exciting, from host computer, check the complete situation of seismic waveformAnd preliminary wave take-off situation; In a launch hole, complete after all transmittings, by the first metallic rod and send outEmitter moves on in another launch hole, continues to gather seismic waveform data, until complete all launch holes and connectThe Wave data collection of batter; Gathered seismic waveform data is processed, render speed distribution map,Judge whether to exist boulder from velocity contour.
Further, the radius of described round C1 is 1～1.5m, the outward flange of described round C2 and cutterheadBetween distance be 0.5m.
Further, the length of exploration hole is 20m, and aperture is 90mm.
Further, in described step (2), while drilling through exploration hole, must be along shield-tunneling construction tunnelAxis direction has a down dip 5 °～10 °, and in exploration hole, must pour water and be full of all the time water.
The invention has the advantages that: step of the present invention is simple, easy to operate, carry out ground in shield machine frontShake CT imaging, the distance of transmitter and receiver is short, and moving interval is little, and resolution ratio is high, can be effectiveSurvey the boulder in shield-tunneling construction front; May there is boulder place borehole imaging in shield machine front, with strong points,Avoid invalid construction, significantly reduced construction cost.
Brief description of the drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the construction process figure that the present invention is based on the shield-tunneling construction boulder detection method of earthquake CT.
Fig. 2 is the structural representation of cutter head of shield machine in the present invention.
Fig. 3 is the structural representation in shield-tunneling construction tunnel in the present invention. .
Fig. 4 is the figure that coordinates of transmitter and the first metallic rod in the present invention.
Fig. 5 is the figure that coordinates that connects emitter and the second metallic rod in the present invention.
Fig. 6 is the fundamental diagram of earthquake CT in the present invention.
Detailed description of the invention
Refer to shown in Fig. 1-3, a kind of shield-tunneling construction boulder detection method based on earthquake CT, comprisesFollowing steps:
(1) cloth hole on cutter head of shield machine: lay the first drilled tunnel group 2 and on cutter head of shield machine 1Two drilled tunnel groups 3; Described the first drilled tunnel group 2 is positioned at the inside of the second drilled tunnel group 3, shouldThe first drilled tunnel group 2 comprises three the first drilled tunnels 21, and described three the first drilled tunnels 21Be evenly distributed on the round C1 taking cutterhead 1 center as the center of circle; Described the second drilled tunnel group 3 comprises sixIndividual the second drilled tunnel 31, and described six the second drilled tunnels 31 are evenly distributed on cutterhead 1 centerOn round C2 for the center of circle; The radius of described round C1 is 1～1.5m, outside described round C2 and cutterhead 1Distance d between edge is 0.5m.
(2) shield machine front boring: in shield-tunneling construction tunnel 12, bore by first on cutterhead 1Hole path 21 and the second drilled tunnel 31, adopt sleeve pipe (not shown) retaining wall, with leading rig (notDiagram) by before backward, drill through 9 exploration holes that length is identical in cutter head of shield machine 1 front, and surveyThe length in hole be greater than described round C1 and circle C2 (the first drilled tunnel 21 and the second drilled tunnel 31 itBetween pitch of holes) between spacing; The length of described exploration hole is 20m, and aperture is 90mm. Wherein,When boring must along the axis direction in shield-tunneling construction tunnel 12 have a down dip 5 °～10 ° (can not be simply along waterSquare to drilling through), and must in exploration hole, pour water, and ensure to be full of all the time water in exploration hole, so that groundSeismic wave can propagate into instrument from hole wall effectively, reduces decay; 21 correspondences of described the first drilled tunnelExploration hole be that the corresponding exploration hole of launch hole 4, the second drilled tunnel 31 is receiver hole 7; Adopt coverManage and protect wall, can effectively guarantee hole quality, both can prevent the avalanche of holing, also can prevent hole clipping.
(3) earthquake CT imaging: a transmitter 5 is fixed on to first hollow metallic rod 6 tops,The first metallic rod 6 tops are stretched in a launch hole 4, and the afterbody of this first metallic rod 6 is inserted in cutterheadIn the first drilled tunnel 21 of 1; By a plurality of receivers 8 intervals and be evenly fixed on one hollowIn two metallic rod 9, the second metallic rod 9 stretches in a receiver hole 7 corresponding to the part of receiver 8, andThe afterbody of the second metallic rod 9 is inserted in the second drilled tunnel 31 of cutterhead 1; Described transmitter 5 and connecingReceive device 8 and be all connected with a host computer 11 by cable 10, cable 10 all should be hidden into the first metallic rod 6With the inside of the second metallic rod 9, as shown in Fig. 4-5.
As shown in Figure 6, the transmitter in launch hole 45 is excited to a plurality of receptions in receiver hole 7Device 8 can carry out multipoint reception; Wherein, in 6 receiver holes 7,1 group of receiver 8 can be installed respectively simultaneously,Receive observation simultaneously; Or 6 receiver holes 7 are received to observation in batches; After completing and once exciting,From host computer 11, check the complete situation of seismic waveform and preliminary wave take-off situation; At a launch holeIn 4, complete after all transmittings, the first metallic rod 6 and transmitter 5 are moved on in another launch hole 4, continueThe continuous seismic waveform data that gathers, until complete the Wave data collection of all launch holes 4 and receiver hole 7;Gathered seismic waveform data is processed, got rid of error, at the beginning of adopting the mode of man-machine combination to pick upDuring to the walking of ripple, storehouse while setting up, according to pick up walk time storehouse, and in conjunction with known engineering geological data,Analysis speed distribution situation, sets up initial velocity model; Adopt bending ray tracing method, draw ray and divideButut, checks whether ray is correctly followed the trail of, and analyzes the sparse situation of ray, render speed distribution map, markShow velocity anomaly district, judge whether to exist boulder from velocity contour. Because boulder belongs to granite inequalityThe weathering core that even weathering is residual, there is velocity of wave difference in boulder and periphery medium, is generally significantly higher thanThe velocity of wave of surrounding medium, can, according to this velocity of wave difference, separate in conjunction with known geology or engineering dataRelease, in the velocity contour of drawing at earthquake CT, judged whether boulder.
(4) boulder explosion
There is boulder if verify shield machine front, carry out according to factors such as the position of boulder, shape and sizesExplosion, guarantees shield machine safe construction.
Step of the present invention is simple, easy to operate, carries out earthquake CT imaging, transmitter in shield machine frontShort with the distance of receiver, moving interval is little, and resolution ratio is high, can effectively survey shield-tunneling construction frontBoulder; May there is boulder place borehole imaging in shield machine front, with strong points, avoid invalid construction,Significantly reduce construction cost.
Claims (4)
1. the shield-tunneling construction boulder detection method based on earthquake CT, is characterized in that: comprise withLower step:
(1) cloth hole on cutter head of shield machine: lay the first drilled tunnel group and second on cutter head of shield machineDrilled tunnel group; Described the first drilled tunnel group is positioned at the inside of the second drilled tunnel group, this first boringPassage group comprises three the first drilled tunnels, and described three the first drilled tunnels are evenly distributed on cutterheadCenter is on the round C1 in the center of circle; Described the second drilled tunnel group comprises six the second drilled tunnels, and instituteStating six the second drilled tunnels is evenly distributed on the round C2 taking cutterhead center as the center of circle;
(2) shield machine front boring: in shield-tunneling construction tunnel, logical by the boring of first on cutterheadRoad and the second drilled tunnel, adopt sleeve pipe retaining wall, with leading rig by backward front in cutter head of shield machine frontDrill through 9 exploration holes that length is identical, and the length of exploration hole is greater than between described round C1 and circle C2Spacing; The corresponding exploration hole of described the first drilled tunnel is launch hole, and the second drilled tunnel institute is correspondingExploration hole be receiver hole;
(3) earthquake CT imaging: a transmitter is fixed on to a first hollow metallic rod top, theOne metallic rod top is stretched in a launch hole, and the afterbody of this first metallic rod is inserted in the first brill of cutterheadIn hole path; By a plurality of receivers interval and be evenly fixed in hollow second metallic rod secondMetallic rod stretches in receiver hole corresponding to the part of receiver, and the afterbody of the second metallic rod is inserted in cutterheadThe second drilled tunnel; Described transmitter is all connected with a host computer by cable with receiver;
Transmitter in excitation-emission hole, carries out multipoint reception by a plurality of receivers in receiver hole; Wherein,1 group of receiver is installed respectively in 6 receiver holes simultaneously, is received observation simultaneously; Or by 6 receptionsHole receives observation in batches; After completing and once exciting, from host computer, check the complete situation of seismic waveformAnd preliminary wave take-off situation; In a launch hole, complete after all transmittings, by the first metallic rod and send outEmitter moves on in another launch hole, continues to gather seismic waveform data, until complete all launch holes and connectThe Wave data collection of batter; Gathered seismic waveform data is processed, render speed distribution map,Judge whether to exist boulder from velocity contour.
2. the shield-tunneling construction boulder detection method based on earthquake CT as claimed in claim 1, its spyLevy and be: the radius of described round C1 is 1～1.5m, between described round C2 and the outward flange of cutterheadDistance is 0.5m.
3. the shield-tunneling construction boulder detection method based on earthquake CT as claimed in claim 1, its featureBe: the length of exploration hole is 20m, aperture is 90mm.
4. the shield-tunneling construction boulder detection method based on earthquake CT as claimed in claim 1, its featureBe: in described step (2), while drilling through exploration hole, must be along the axis direction in shield-tunneling construction tunnelHave a down dip 5 °～10 °, and in exploration hole, must pour water and be full of all the time water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511017131.1A CN105604557B (en) | 2015-12-30 | 2015-12-30 | Shield-tunneling construction boulder detection method based on earthquake CT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511017131.1A CN105604557B (en) | 2015-12-30 | 2015-12-30 | Shield-tunneling construction boulder detection method based on earthquake CT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105604557A true CN105604557A (en) | 2016-05-25 |
| CN105604557B CN105604557B (en) | 2018-03-23 |
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| CN201511017131.1A Expired - Fee Related CN105604557B (en) | 2015-12-30 | 2015-12-30 | Shield-tunneling construction boulder detection method based on earthquake CT |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401594A (en) * | 2016-07-26 | 2017-02-15 | 福建工程学院 | Arrangement method of tools on composite cutterhead of shield tunneling machine |
| CN106567713A (en) * | 2016-11-03 | 2017-04-19 | 上海隧道工程有限公司 | Construction method and system for shield tunneling advanced detection in marine stratum |
| CN108415100A (en) * | 2018-03-01 | 2018-08-17 | 广州轨道交通建设监理有限公司 | A kind of high level of accuracy integrated exploration method for granite onion weathering body |
| CN109407144A (en) * | 2018-12-05 | 2019-03-01 | 中国矿业大学 | A kind of single hole boulder three-dimensional probe method based on more waves |
| CN110469334A (en) * | 2019-09-06 | 2019-11-19 | 广西大学 | A kind of blasting system for metro shield boulder and prominent rock blasting |
| CN111123351A (en) * | 2019-11-29 | 2020-05-08 | 中铁工程服务有限公司 | Advanced forecasting system and method for shield construction |
| CN117214957A (en) * | 2023-05-31 | 2023-12-12 | 珠海市轨道交通有限公司 | Boulder detection device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401594A (en) * | 2016-07-26 | 2017-02-15 | 福建工程学院 | Arrangement method of tools on composite cutterhead of shield tunneling machine |
| CN106401594B (en) * | 2016-07-26 | 2018-08-07 | 福建工程学院 | A kind of compound knife disc tool method for arranging of shield machine |
| CN106567713A (en) * | 2016-11-03 | 2017-04-19 | 上海隧道工程有限公司 | Construction method and system for shield tunneling advanced detection in marine stratum |
| CN108415100A (en) * | 2018-03-01 | 2018-08-17 | 广州轨道交通建设监理有限公司 | A kind of high level of accuracy integrated exploration method for granite onion weathering body |
| CN109407144A (en) * | 2018-12-05 | 2019-03-01 | 中国矿业大学 | A kind of single hole boulder three-dimensional probe method based on more waves |
| CN110469334A (en) * | 2019-09-06 | 2019-11-19 | 广西大学 | A kind of blasting system for metro shield boulder and prominent rock blasting |
| CN110469334B (en) * | 2019-09-06 | 2020-10-02 | 广西大学 | Blasting system for blasting subway shield boulders and protruding rocks |
| CN111123351A (en) * | 2019-11-29 | 2020-05-08 | 中铁工程服务有限公司 | Advanced forecasting system and method for shield construction |
| CN111123351B (en) * | 2019-11-29 | 2022-03-15 | 中铁工程服务有限公司 | Advanced forecasting system and method for shield construction |
| CN117214957A (en) * | 2023-05-31 | 2023-12-12 | 珠海市轨道交通有限公司 | Boulder detection device and method |
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