CN107065014A - It is a kind of that the Subway Tunnel boulder group detection method for combining geological drilling is detected based on fine motion - Google Patents
It is a kind of that the Subway Tunnel boulder group detection method for combining geological drilling is detected based on fine motion Download PDFInfo
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
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Abstract
The invention discloses a kind of Subway Tunnel boulder group detection method that combination geological drilling is detected based on fine motion, include boulder size and locus protocol step in the range of detection interval tunnel excavation, the step content is：Natural micro-tremor signal is obtained using " fine motion detection " geophysical exploration new technology, face ripple signal is extracted by data processing and analysis means, inverting obtains underground Mapping The S-wave Velocity Structure, to detect geological structure, determines the distribution of boulder group.Then geological drilling is carried out by cloth hole, the size and spatial distribution concrete condition of interval boulder is obtained using boring and coring.The determination and each boulder body size, determination of spatial distribution position in the achievable boulder group region of the present invention, it is adaptable to which boulder is detected in the range of Shield Tunneling.
Description
Technical field
The present invention relates to a kind of pipe sheet assembling method, specific design is a kind of to detect the subway for combining geological drilling based on fine motion
Interval boulder group detection method.
Background technology
In city rail project, interval between station is general to use subterranean tunnel form, it is inevitable the need in complexity
Constructed in stratum.Existing running tunnel construction method uses shield method mostly, due to boulder intensity and its surrounding formation intensity phase
It is huger than difference, if dashing forward in shield tunneling process meets boulder, often cutter head of shield machine is caused to damage, influence shield machine is normally applied
Work, causes economic loss, can more cause surface subsidence abnormal sometimes, the safety of influence construction periphery buildings or structures.Work now
The geologic prospect technology in journey field not yet has cost relatively low and effective technological means can detect clear construction completely
In the range of boulder spatial distribution and size.Therefore, boulder has become one of natural enemy of subterranean tunnel shield-tunneling construction how
The processing boulder of economy, science, it is to avoid boulder causes safety, quality and influence economically to shield-tunneling construction, is shield-tunneling construction
Necessarily suffer from a problem that.
Existing two kinds of boulder detection methods are probing and physical prospecting, and probing is to extract soil layer core sample using geological drilling rig, with
This verifies boulder；Physical prospecting refers to, by the progress microwave sounding of the instruments such as geological radar, across hole resistivity CT, boulder be verified whereby.
Existing boulder detection method is primarily present problems with：
1. probing can intuitively disclose the vertical size of boulder, locus and the phase in the range of depth of stratum at drill site position
Physical characteristic is closed, horizontal size and the position of boulder are can determine that by several boring points.But it is extremely many for boulder quantity
Boulder group, changes scope and is limited by cost, place, can not largely be realized.
2. geophysical prospecting method is not limited by landform, and advantage of lower cost.But lack system in-depth study in the industry now, not
There are a set of ripe detection instrument and method, detection accuracy misalignment often occur, exist several small boulder detections are big for one
The situation of boulder, because can not be in practice used alone in engineering.
It is, therefore, desirable to provide a kind of mature and reliable and the construction cost lower ground interval boulder group detection method of iron, existing
Have and be improved on the basis of boulder detection method, the precision of increase boulder detection, to realize running tunnel Shield Construction Method Used
Meet boulder group and one feasible method is provided.
The content of the invention
The purpose of the present invention is that there is provided a kind of cost is low, boulder detection accuracy is high, suitable for more than background technology not enough
With property is strong, work efficiency is high that the Subway Tunnel boulder detection method for combining geological drilling is detected based on fine motion.
Technical scheme is as follows：
(1) fine motion array detection obtains micro-tremor signal, and testing jiggle instrument enters after consistency detection is qualified to interval range
The row fine motion array is detected, and is obtained micro-tremor signal and is carried out Evaluating and screening to signal, and makes fine motion result of detection figure；
1. fine motion data acquisition is completed using SWS-6 engineering seismograph combinations three-component geophone, to the uniformity of instrument
Evaluation is made, uniformity is up to 90% using top to be qualified.
Detected on the ground from small mileage toward big mileage direction when 2. constructing, investigative range is that single line excavation in tunnel is flat
Face scope.The each observation time of single-point is 10 minutes~20 minutes, and the whole array is moved to next exploration by observation after terminating
Point observation.
3. Evaluating and screening is carried out to micro-tremor signal after collection is finished, rejects indivedual because the data of the excessive influence of noise.
4. draw two dimension and regard S wave velocities profile and H/V curve maps.
(2) boulder group distribution is determined, fine motion result of detection figure is analyzed, is determined using decision criteria lonely in interval range
Stone group's distribution.
(3) geotechnical boring, geotechnical boring cloth hole is carried out according to the boulder group distribution obtained by above-mentioned steps (2),
Interval boulder group position lays dense holes, non-boulder group position and lays loose hole, passes through the core size and depth in the core sample that drills
Degree position determines size and the locus of boulder.
(4) proper treatment is carried out to the boulder size obtained in (3) step and locus, in interval level section and vertical section map
Size and the locus of boulder are drawn, running tunnel boulder distribution map is formed.
The present invention is detected based on fine motion in the Subway Tunnel boulder detection method for combining geological drilling, and step (1) is described micro-
Dynamic detection instrument is that SWS-6 engineering seismograph combinations three-component geophone completes fine motion data acquisition, and the system picks up shake instrument by 2Hz
(velocity profile, three-component) and seismic detector are constituted.Record the fine motion number of 6 vibration pickups (pendulum) of an array simultaneously with a recorder
According to.Geological drilling equipment described in step (3) is ZL50 geological drilling rigs.
The present invention improves that high, the poor for applicability shortcoming of traditional geology drilling cost, traditional physical prospecting detection accuracy are low to be lacked
Point, based on physical prospecting, is defined the heart by geological drilling, with the beneficial effect that precision is accurate, work efficiency is high, cost is low.With existing skill
Art compares, and the present invention uses " fine motion detection " natural micro-tremor signal of this technical limit spacing, determines the distribution of boulder group.
Cloth hole and geological drilling are carried out on boulder group distribution figure, size and the space of interval boulder are obtained by boring and coring
It is distributed concrete condition.After boulder size and spatial distribution is verified, running tunnel boulder group distribution map is drawn, shield can be applied to
Boulder group detection construction in the range of structure method tunnel excavation.
The reason for fine motion detection is because of Detection Techniques, are not very high for the precision that boulder is detected, for individually lonely
Easily visited by mistake for stone, it is impossible to the accurate size for determining boulder and locus.Compared with existing certain methods, the present invention is simultaneously
Boulder size and locus are not determined by fine motion detection, but the distribution model for determining boulder group is detected by fine motion
Enclose, then detected again by fine motion and draw bright boulder group region, save the cloth hole density of geotechnical boring, cost of implementation reduction, essence
Degree is improved.
Brief description of the drawings
Fig. 1 is fine motion of the present invention detection array arrangement schematic diagram；
T1 to T6 is vibration pickup；Arrow is survey line direction of advance
Fig. 2 is that boulder group areal geology drilling hole of the present invention arranges schematic diagram；
Fig. 3 is non-boulder group areal geology drilling hole arrangement schematic diagram of the invention；
Fig. 4 is that boring coring of the present invention meets encryption cloth hole schematic diagram after boulder.
1- intervals sideline 2- tunnels center line 3- geotechnical boring points
There is boulder 32- core samples and not there is no boulder in 31- core samples
Embodiment
The present invention is described in further details with reference to specific embodiments and the drawings.
By taking the construction of certain Shield Method Tunnel for Metro running tunnel as an example, construction geology drills 23 the block design investigation stage altogether,
Wherein there are 6 drillings to disclose onion weathering body (boulder).When construction interval originates shield well, stratum is deposited in circuit depth bounds
In a large amount of boulders, a diameter of 0.3~3.5m of boulder.4 groups of uniaxial compressive strength tests are carried out to rock sample, uniaxial compressive strength value exists
Between 134.2~144.7MPa, therefore conclude that interval has boulder group, boulder detection need to be carried out, the embodiment boulder detection side
Case particular content is as follows：
(1) fine motion is detected
1. instrument consistency detection
Fine motion data acquisition is completed using SWS-6 engineering seismograph combinations three-component geophone, the system picks up shake instrument by 2Hz
(velocity profile, three-component) and seismic detector are constituted.Record the fine motion number of 6 vibration pickups (pendulum) of an array simultaneously with a recorder
According to.As a result show, the uniformity of instrument is better than 97%, reach that fine motion detects the requirement to instrument uniformity.
2. micro-tremor signal is detected
The observation system of fine motion detection mainly uses regular pentagon circular array, and each circular array is by being positioned over positive five side
Shape summit and 6 pendulum and data collecting system composition of central point, the distance on regular pentagon summit to central point are referred to as observation half
Footpath R.According to the difference of live site condition, the array that the different radiis such as 2~2.5m have been respectively adopted is observed, by 5m measuring points
Spacing pointwise is carried out, to form two dimensional cross-section observation, as shown in Figure 1.
Detected on the ground from small mileage toward big mileage direction during construction, investigative range is that tunnel single line excavates plane
Scope.The each observation time of single-point is 10 minutes~20 minutes, and the whole array is moved to next exploratory spot by observation after terminating
Observation.
3. signal data evaluation and screening
Because micro-tremor signal detection construction site is interval surface road surface, it is located in traffic major trunk roads, although data acquisition
Night 10 typically on the day of:00 up to next day 5:20, but still some vehicular traffic passes through, vehicle will by the noise caused
Influence the collection of data.
In order to ensure original record quality, initial data, the slightly larger survey of 10 background noises are checked in time during on-the-spot test
Point carries out repetition measurement.The data SNR of this construction collection is of a relatively high, and data processing reliability is high.This fine motion detection coexistence
208 (including 10 repetition measurement points) fine motion sensing points are managed, 198 smooth dispersion curves are obtained.
4. draw two dimension and regard S wave velocities profile and H/V curve maps
Site operation has fine motion record to ask spatial autocorrelation coefficient to use instrumentation, and angular frequency is extracted by vibration pickup
Ripple, then voluntarily calculates the correlation computer of spatial autocorrelation coefficient, and automatically forms dispersion curve.
(2) boulder group distribution is determined
The Weathered Granite soil body difference of boulder group and surrounding is：1. density difference；(2) S wave velocities difference；(3) S ripples
Wave impedance difference.By what fine motion detection was obtained orphan in the range of tunnel excavation is can determine that depending on S wave velocities profile and H/V curve maps
Shi Qun distribution, specific criterion is as follows：
According to criterion, there is boulder group at 5 in the present embodiment, it is as follows：
(3) geotechnical boring
The specific size and spatial distribution of boulder can be grasped in detail using geological drilling method.
1. drilling is arranged
Pipeline is detected with geology radar detector before geological drilling construction, it is ensured that will not be destructively in boring procedure
Underground pipelines.Risen away from shield tunneling horizontal edge 1.5m and be longitudinally arranged 2 gang drill inspecting holes, between boulder group area is per gang drill inspecting hole circuit longitudinal direction
Away from 1.5m, 1 meter is bored into below tunnel bottom surface, to ensure to grasp interval geological condition completely, with reference to fine motion Effect on Detecting, to peace
The whole district (non-boulder group area) is bored into below tunnel bottom surface 1 meter per gang drill inspecting hole circuit longitudinal pitch 5m.Drilling plane layout drawing
As shown in accompanying drawing 2,3.
2. probing finds boulder
Verify and exist behind boulder position, shape size is not clear, to have verified the drilling of boulder as basic point, to detect orphan
Outwards arrangement drilling circle is put centered on the point of stone, the former drilling 0.6m of first lap distance four direction arranges 4 drillings；If first
Circle drilling can't find the border of boulder, then away from the outside 0.6 meter of arrangement second circle drilling of first lap circumference；By that analogy, directly
Untill boulder border is found, to determine the concrete shape and size of boulder, drilling plane layout drawing is as shown in Figure 4.From reality
Drilling finds that interval has multiple boulder groups, and individual boulder diameter 0.3m~3.5m, most drillings find 4 orphans
Stone is present.
3. geological drilling subsequent treatment
Ensure that aperture absolute altitude keeps flat with original ground for not detecting boulder or basement rock projection after drilling, after sealing of hole
It is whole, then original ground is cleaned out；The drilling of boulder or basement rock projection is such as found, detailed borehole log is carried out and (remembers：Drilling
Plane coordinates, boulder top surface and bottom surface absolute altitude, basal surfaces absolute altitude), and protected with double headed roller lid diameter 75mmPVC pillars complete opening
Shield drilling (bore diameter 89mm), utilizes this hole, to reduce cost during explosion.
(4) running tunnel boulder distribution map is drawn
1. data record is carried out to each chance boulder boring point, boulder point is met in all drillings of integration, in running tunnel plane
Labeling position in figure, the substantitally planar profile size of boulder is described along position.
2. according to the depth location of boulder in core sample after coring, respective depth position is marked in running tunnel skiagraph
Put, and the vertical section profile size of boulder is drawn out using the length of core.
In summary, it is of the present invention that the Subway Tunnel boulder detection method energy essence for combining geological drilling is detected based on fine motion
Boulder group distribution is determined, and accurately determines size and the locus of each boulder, and overcomes existing boulder detection
The defect such as poor for applicability, accuracy is low, cost is high, it is adaptable to which boulder group is detected in the range of Shield Tunneling.Present invention tool
Have the advantages that precision is high, cost is low, strong applicability, can accurately verify boulder group position and size, effectively support shield interval
Tunnel boulder explosion treatment, beneficial effect is played to the integral construction of shield running tunnel.
Claims (5)
1. a kind of detect the Subway Tunnel boulder group detection method for combining geological drilling based on fine motion, method comprises the following steps：
(1) detection of the fine motion array obtains micro-tremor signal, and carries out Evaluating and screening to signal；According to the observation system of design during construction
It is observed along survey line pointwise, each observation time of single-point is 10 minutes~20 minutes, and observation moves the whole array after terminating
To the observation of next exploratory spot, detected on the ground from small mileage toward big mileage direction, investigative range is that tunnel single line is opened
Dig planar range；Collection carries out Evaluating and screening after finishing to micro-tremor signal, rejects indivedual because the data of the excessive influence of noise, system
Make two dimension and regard S wave velocities profile and H/V curve maps；
(2) boulder group distribution is determined, analysis regards S wave velocities section and H/V curves, to determine boulder group in interval range
Distribution；The obtained boulder group in the range of S wave velocities profile and H/V curve maps judgement tunnel excavation is detected by fine motion
Distribution, specific criterion is as follows：
(3) geotechnical boring, on the basis of (2) step, carries out the laying of geotechnical boring point, is laid in interval boulder group position close
Collect hole, non-boulder group position and lay loose hole；Then start geological drilling coring, pass through the core size and depth in the core sample that drills
Degree position determines size and the locus of boulder；
(4) proper treatment is carried out to the boulder size obtained in (3) step and locus, draws the distribution of running tunnel boulder
Figure.
2. according to claim 1 detect the Subway Tunnel boulder group detection method for combining geological drilling based on fine motion, its
It is characterised by：The array that step (1) employs the different radiis such as 2~2.5m is observed, and is carried out by the pointwise of 5m measuring point spacing, with
Form two dimensional cross-section observation.
3. according to claim 1 detect the Subway Tunnel boulder group detection method for combining geological drilling based on fine motion, its
It is characterised by：In the step (1), testing jiggle instrument carries out fine motion detection after test passes, and micro-tremor signal is commented
Valency is screened, and makes fine motion result of detection figure：
Fine motion data acquisition is completed using SWS-6 engineering seismograph combinations three-component geophone, before data are formally gathered, to note
Record instrument is acquired parameter setting.
4. according to claim 1 detect the Subway Tunnel boulder group detection method for combining geological drilling based on fine motion, its
It is characterised by：The fine motion detection instrument is that SWS-6 engineering seismograph combinations three-component geophone completes fine motion data acquisition, should
System picks up shake instrument by velocity profile, three-component 2Hz and seismic detector is constituted, and 6 pick-ups of an array are recorded simultaneously with a recorder
The fine motion data of device.
5. according to claim 1 detect the Subway Tunnel boulder detection method for combining geological drilling based on fine motion, it is special
Levy and be：Described geological drilling equipment is ZL50 geological drilling rigs.
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Cited By (9)
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| CN108152854A (en) * | 2017-11-30 | 2018-06-12 | 福建省建筑设计研究院有限公司 | A kind of lossless detection method and its application based on fine motion power spectral density |
| CN108318918A (en) * | 2017-12-29 | 2018-07-24 | 福建省建筑设计研究院有限公司 | Underground unfavorable geologic body lossless detection method based on fine motion dispersion curve and H/V curves and application |
| CN110031893A (en) * | 2019-04-19 | 2019-07-19 | 中国电建集团铁路建设有限公司 | Drilling surveys new method with combining the subway engineering of fine motion detection |
| CN110426741A (en) * | 2019-08-02 | 2019-11-08 | 中铁第四勘察设计院集团有限公司 | A kind of earthquake noise imaging exploitation method, device and storage medium |
| CN110488349A (en) * | 2019-08-20 | 2019-11-22 | 福建省建筑设计研究院有限公司 | The lossless detection method and application than VHSR are composed based on fine motion three-component |
| CN111812707A (en) * | 2020-07-07 | 2020-10-23 | 中交二公局第三工程有限公司 | Method for detecting boulders in subway line site based on micro-motion and surface wave exploration |
| CN114240073A (en) * | 2021-11-25 | 2022-03-25 | 湖北省地震局(中国地震局地震研究所) | Micro-motion exploration construction method, system, computer equipment and storage medium |
| CN115061201A (en) * | 2022-06-09 | 2022-09-16 | 腾达建设集团股份有限公司 | A Geological Advance Prediction Method for Shield Tunneling |
| CN119355802A (en) * | 2024-10-21 | 2025-01-24 | 山东大学 | A shield tunnel active and passive source combined geological detection method and system |
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| CN108152854A (en) * | 2017-11-30 | 2018-06-12 | 福建省建筑设计研究院有限公司 | A kind of lossless detection method and its application based on fine motion power spectral density |
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| CN110488349A (en) * | 2019-08-20 | 2019-11-22 | 福建省建筑设计研究院有限公司 | The lossless detection method and application than VHSR are composed based on fine motion three-component |
| CN111812707A (en) * | 2020-07-07 | 2020-10-23 | 中交二公局第三工程有限公司 | Method for detecting boulders in subway line site based on micro-motion and surface wave exploration |
| CN114240073A (en) * | 2021-11-25 | 2022-03-25 | 湖北省地震局(中国地震局地震研究所) | Micro-motion exploration construction method, system, computer equipment and storage medium |
| CN115061201A (en) * | 2022-06-09 | 2022-09-16 | 腾达建设集团股份有限公司 | A Geological Advance Prediction Method for Shield Tunneling |
| CN119355802A (en) * | 2024-10-21 | 2025-01-24 | 山东大学 | A shield tunnel active and passive source combined geological detection method and system |
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Application publication date: 20170818 |