CN110045412A - One kind being based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method - Google Patents
One kind being based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method Download PDFInfo
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- CN110045412A CN110045412A CN201910273047.8A CN201910273047A CN110045412A CN 110045412 A CN110045412 A CN 110045412A CN 201910273047 A CN201910273047 A CN 201910273047A CN 110045412 A CN110045412 A CN 110045412A
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- hobboing cutter
- sensor
- tbm
- cutterhead
- tunnel
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/11—Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
Abstract
The invention belongs to geotechnical engineering fields, more particularly to one kind to be based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method.This method comprises: laying sensor in the tunnel sidewalls excavated before TBM detritus driving；Obtain the geodetic coordinates of sensor and the geodetic coordinates of each hobboing cutter on TBM cutterhead；The hobboing cutter on each subregion is set successively to tap face；TBM is tunneled forward, hits each hobboing cutter on TBM cutterhead successively with face, to excite active signal source, obtains data；Successively obtain the coordinate that hobboing cutter and face on TBM cutterhead on remaining subregion hit the reflection point of the elastic wave generated；It as TBM is tunneled forward, repeats the above steps every one section of fixed range, to obtain the coordinate of more reflection points, obtained reflection point coordinate is attached, that is, can determine the structural plane situation of front of tunnel heading.The present invention is a kind of accurate method for obtaining front of tunnel heading unfavorable geologic body state.
Description
Technical field
The invention belongs to geotechnical engineering field, more particularly to one kind are bad based on TBM detritus microseism information front of tunnel heading
Geologic body detection method.
Background technique
Currently, deep rock engineering is more and more, and depth is increasing.With the increase of depth, rock mass institute preservation
Geological environment is increasingly complex, and crustal stress is higher, excavates rock burst, bump, gas explosion, gushing water, Climatic regionalization of induction etc.
Important Project disaster is more prominent, serious, causes huge Loss of Life and property.
Full face rock tunnel boring machine (Full Face Rock Tunnel Boring Machine), abbreviation TBM are collection
Mechanical, electrical, light, liquid are in the large complicated underground construction equipment of one.It has quick, high-quality, peace in tunnel excavating process
Entirely, the advantages that environmentally friendly and economic, speed of application not only can be improved in construction, shorten the construction period, life can also be made to obtain honor
Weight, environment are effectively protected, and therefore, have very high Social benefit and economic benefit in tunnel piercing engineering, increasingly
It mostly applies in deep rock engineering.
TBM is in deep rock engineering, it is thus necessary to determine that front of tunnel heading unfavorable geologic body state is adopted more in the prior art
With predictions such as rock burst, impulsion pressures, but above-mentioned prediction mode is needed to seismic source location, due to focus in the prior art
The precision of positioning is unstable, therefore, causes the acquisition of front of tunnel heading unfavorable geologic body state not accurate enough.
Therefore, the prior art need to be improved.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides one kind based on before TBM detritus microseism information face
Square unfavorable geologic body detection method, to improve the accuracy of the acquisition of front of tunnel heading unfavorable geologic body state.
The present invention through the following technical solutions to achieve the above objectives:
One kind being based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method, which comprises
S1: before TBM detritus driving, sensor is laid in the tunnel sidewalls excavated, the sensor is along the tunnel
The length direction in road is disposed with multilayer sensor, and every layer of sensor includes multiple sensors；
S2: the geodetic coordinates of each hobboing cutter on the geodetic coordinates and TBM cutterhead of sensor, the TBM cutterhead are obtained
Angularly it is divided into several subregions, is provided with hobboing cutter on each subregion；
S3: the hobboing cutter on each subregion is made successively to tap face；
S4:TBM is tunneled forward, hits each hobboing cutter on TBM cutterhead successively with face, to excite active signal
Source, active signal source, to preceding propagation, reach weak structural face in rock mass, since normal rock mass and structural plane are respectively that Bomi is situated between
Matter and wave dredge medium, will cause the reflection of elastic wave, and the reflection of elastic wave is embedded in the sensor real-time reception of tunnel sidewalls,
During this, the position coordinates in excitation active signal source are obtained, and record the time that the hobboing cutter on each subregion taps face
And sensor receives the time of elastic wave, and then obtains correspondingly initial firing time matrix and receiving time matrix,
And then obtain the arrival time difference matrix of single impact；
S5: the seat that hobboing cutter and face on TBM cutterhead on the first subregion hit the reflection point of the elastic wave generated is obtained
Mark:
S51: least square method constructed fuction is used:
In the function, riFor the difference of i-th sensor arrival time difference and wave propagation time, tiIt is received for i-th of sensor
Elastic wave arrives duration, t0Active signal source time value is excited for hobboing cutter, (x, y, z) is the reflection point coordinate of elastic wave, (x0,
y0,z0) it is the position coordinates for exciting active signal source, (x1, y1, z1) be i-th of sensor position coordinates, V is tunnel boring
Survey velocity of wave；
S52: the residual sum of squares (RSS) objective function the most when taking theory and observing:
It takes:
A δ X=r, δ X={ δ x0,δy0,δz0}T, X={ x0,y0,z0}T
ATA δ X=ATR, δ X=(ATA)-1ATr
It is iterated calculating according to above formula, X is updated with ω (δ X+X) every time, the final result of iteration will make objective functionReach minimum value, so that it is determined that reflection point coordinate (x, y, z), wherein w F meet newton to go down the hill
Method condition；
S52: when positioning starts, first using the sensor coordinates that trigger at first and then as initial value, Newton-decline method is used
Positioning obtains a positioning result, then using the result as initial value, carries out second using Newton-decline method and positions, and then obtain
Get the positioning result of the reflection point of final elastic wave；
S6: according to step S5, hobboing cutter and face on TBM cutterhead on remaining subregion is successively obtained and hits the elasticity generated
The coordinate of the reflection point of wave；
S7: as TBM is tunneled forward, repeating S3-S6 every one section of fixed range, to obtain the coordinate of more reflection points,
Obtained reflection point coordinate is attached, that is, can determine the structural plane situation of front of tunnel heading.
Further, length direction of the sensor along the tunnel is disposed with multilayer sensor, every layer of sensing
Device includes multiple sensors, is specifically included:
Length direction interval 30m of the sensor along the tunnel sets gradually the sensor that haves three layers, every layer of sensor packet
3 sensors are included, a sensor in 3 sensors is located at the top of the tunnel sidewalls, 3 biographies
Other two described sensor in sensor is symmetricly set on the tunnel sidewalls with the middle vertical plane in the tunnel.
Preferably, the central angle between other two described sensor in 3 sensors is 120 °.
Further, the acquisition methods of the position coordinates in the excitation active signal source are as follows:
The geodetic coordinates and hobboing cutter and position coordinates when rock face of the hobboing cutter on each subregion are obtained,
It specifically includes:
Obtain the geodetic coordinates (x of the hobboing cutter on each subregionD1,yD1,zD1)；
It controls cutterhead rotation and/or hobboing cutter is flexible, until the hobboing cutter and rock face, obtain the flexible of the hobboing cutter
Distance；
If cutterhead is located at references angle, and cutterhead does not rotate, and only hobboing cutter is elastic, it is determined that hobboing cutter and area
Position coordinates when face contact are (xD1+Δl,yD1,zD1), wherein Δ x is the distance of stretch out and draw back of hobboing cutter；
If cutterhead rotates, hobboing cutter is not elastic, it is determined that position coordinates when hobboing cutter and rock face are (xD1+
Δl,yD1,zD1), wherein θ is the rotational angle of cutterhead；
If cutterhead rotates, hobboing cutter is elastic, it is determined that position coordinates when hobboing cutter and rock face are (xD1+Δl,
yD1cosθ,zD1Sin θ), wherein Δ x is the distance of stretch out and draw back of hobboing cutter, and θ is the rotational angle of cutterhead.
Further, layout angle sensor on the main drive rod axis of the cutterhead, to determine the rotational angle of cutterhead.
Further, it is provided on the cutterhead and the one-to-one telescoping mechanism of the hobboing cutter, the telescoping mechanism
Telescopic end can be flexible along the axially direction for being parallel to the cutterhead, the hobboing cutter is fixed at the telescoping mechanism
On telescopic end；
Setting is there are two displacement side lever positioned opposite on the circumferential surface of the telescoping mechanism, the respectively first displacement side lever and
Second displacement side lever, the first displacement side lever are fixed in the fixing end of the telescoping mechanism, the second displacement side
Bar is fixed at the telescopic end of the telescoping mechanism, and the one of the displacement sensor of the distance of stretch out and draw back for measuring the hobboing cutter
End is slidably arranged on the first displacement side lever, and the other end of institute's displacement sensors is fixed at the second displacement
On side lever, the change of distance can pass through institute's displacement sensors between the first displacement side lever and the second displacement side lever
It measures
The beneficial effects of the present invention are:
One kind provided by the present invention is based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method, by
Then during TBM detritus tunnels, face is successively tapped by the hobboing cutter on control TBM cutterhead, hobboing cutter taps area
Face generates elastic wave, the method by calculating acquisition elastic wave reflex point position, the coordinate of the reflection point of Lai Shixian elastic wave,
And then connect obtained reflection point coordinate, that is, it can determine the structural plane situation of front of tunnel heading, be a kind of accurate acquisition area
The method of square unfavorable geologic body state in front.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is that one kind of the embodiment of the present invention is based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection side
The flow diagram of method；
Fig. 2 is the arrangement schematic diagram of the sensor of the embodiment of the present invention；
Fig. 3 is the arrangement schematic diagram of cutterhead in the embodiment of the present invention；
Fig. 4 is the arrangement schematic diagram of the displacement sensor of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Fig. 1 is that one kind of the embodiment of the present invention is based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection side
The flow diagram of method, in conjunction with Fig. 1, this method comprises:
S1: before TBM detritus driving, sensor, length of the sensor along tunnel are laid in the tunnel sidewalls excavated
Direction is disposed with multilayer sensor, and every layer of sensor includes multiple sensors.
Specifically, the sensor of the embodiment of the present invention, can real-time collecting acoustic signals, and be convertible into other energy letter
The sensor of number (usually electric signal), for data acquisition.
Fig. 2 is the arrangement schematic diagram of the sensor of the embodiment of the present invention, and in conjunction with Fig. 2, the sensor 1 of the embodiment of the present invention can
The sensor that haves three layers is set gradually with the length direction interval 30m along tunnel 2, every layer of sensor includes 3 sensor 1,3
A sensor 1 in sensor 1 is located at 2 side coping (i.e. vault) of tunnel, other two sensing in 3 sensors 1
Device 1 is symmetricly set on tunnel sidewalls with the middle vertical plane in tunnel 2, i.e., the embodiment of the present invention is provided with 9 sensors, forms arc
The grid of shape is arranged.
In the embodiment of the present invention, the central angle between other two sensor 1 in 3 sensors 1 is 120 °, certainly,
Quantity, the number of plies and the angle of sensor can according to need specific setting, the embodiment of the present invention to this with no restriction.
In addition, sensor is using recyclable setting, with the driving of TBM, on rear side of tunnel in the embodiment of the present invention
Sensor can be transferred to front rotation and use, to save equipment cost.
S2: the geodetic coordinates of each hobboing cutter on the geodetic coordinates and TBM cutterhead of sensor, TBM cutterhead isogonism are obtained
Degree is divided into several subregions, is provided with hobboing cutter on each subregion.
It is tunnel axis direction that the embodiment of the present invention, which defines the direction x, and the direction z is edpth of tunnel direction, the direction y and the direction x,
The plane of the direction z composition is vertical.
In the embodiment of the present invention, sensor and driving before TBM cutterhead be all it is static, therefore, can directly measure
Come, and sensor requires the geodetic coordinates of determination sensor after installation is changed in first installation and each side wheel, with clear
The position coordinates of sensor.
Fig. 3 is the arrangement schematic diagram of cutterhead in the embodiment of the present invention, in conjunction with Fig. 3, in the embodiment of the present invention, on cutterhead 3
8 subregions are angularly provided with, and can be 45 ° with number consecutively, the central angle of each subregion, and can be set on each subregion
Hobboing cutter 4 there are two setting.
S3: the hobboing cutter on each subregion is made successively to tap face.
Cutterhead is when initial position is pushed ahead, still, since face itself is uneven, it cannot be guaranteed that average mark is good
All areas can touch face, therefore, at this moment just need to regard specific face situation, rotating cutter-head and control
Hobboing cutter is flexible, guarantees that the hobboing cutter of each subregion can reach best construction distance with face.
Based on this, layout angle sensor on the main drive rod axis of cutterhead of the embodiment of the present invention, to determine turning for cutterhead
Dynamic angle, and be provided on cutterhead with the one-to-one telescoping mechanism of hobboing cutter, the telescopic end of telescoping mechanism can be along being parallel to cutterhead
Axially direction it is flexible, hobboing cutter is fixed on the telescopic end of telescoping mechanism, and the telescopic end by controlling telescoping mechanism is stretched
Contracting can ensure that hobboing cutter contacts face.
In order to determine the collapsing length of hobboing cutter, the embodiment of the present invention is provided with displacement sensor, and Fig. 4 is the embodiment of the present invention
Displacement sensor arrangement schematic diagram, in conjunction with Fig. 4, the embodiment of the present invention is arranged there are two phase on the circumferential surface of telescoping mechanism
To the displacement side lever of arrangement, the respectively first displacement side lever 5 and second displacement side lever 6, the first displacement side lever 5 are fixed at
In the fixing end of telescoping mechanism, second displacement side lever 6 is fixed at the telescopic end of telescoping mechanism, for measuring stretching for hobboing cutter
7 one end of the displacement sensor of contracting distance are slidably arranged in 5 on the first displacement side lever, and the other end fixation of displacement sensor 7 is set
It sets on second displacement side lever 6, the change of distance can pass through displacement sensing between the first displacement side lever 6 and second displacement side lever 7
Device 5 measures, which is the distance of stretch out and draw back of hobboing cutter 4.
Further, in present example, the first displacement side lever 5 can be set a pilot hole, in the pilot hole
Mandrel is parallel to the central axis setting of cutterhead, and one end of displacement sensor 7 is slidably arranged in the pilot hole, with limiting displacement
The moving direction of sensor 7 so that the distance of stretch out and draw back of hobboing cutter 4 obtain it is more accurate.
S4:TBM is tunneled forward, hits each hobboing cutter on TBM cutterhead successively with face, to excite active signal
Source, active signal source, to preceding propagation, reach weak structural face in rock mass, since normal rock mass and structural plane are respectively that Bomi is situated between
Matter and wave dredge medium, will cause the reflection of elastic wave, and the reflection of elastic wave is embedded in the sensor real-time reception of tunnel sidewalls,
During this, the position coordinates in excitation active signal source are obtained, and record the time that the hobboing cutter on each subregion taps face
And sensor receives the time of elastic wave, and then obtains correspondingly initial firing time matrix and receiving time matrix,
And then obtain the arrival time difference matrix of single impact；
In the embodiment of the present invention, the position coordinates, that is, hobboing cutter in active signal source and the position of front rock face are excited,
The position coordinates acquisition methods at the position are as follows:
Obtain the geodetic coordinates (x of the hobboing cutter on each subregionD1,yD1,zD1), as described above, the geodetic coordinates of hobboing cutter can
It is learnt with actual measurement；
It controls cutterhead rotation and/or hobboing cutter is flexible, until hobboing cutter and rock face, obtain the distance of stretch out and draw back of hobboing cutter；
If cutterhead is located at references angle, and cutterhead does not rotate, and only hobboing cutter is elastic, it is determined that hobboing cutter and area
Position coordinates when face contact are (xD1+Δl,yD1,zD1), wherein Δ l is the distance of stretch out and draw back of hobboing cutter；
If cutterhead rotates, hobboing cutter is not elastic, it is determined that position coordinates when hobboing cutter and rock face are (xD1+
Δl,yD1,zD1), wherein θ is the rotational angle of cutterhead；
If cutterhead rotates, hobboing cutter is elastic, it is determined that position coordinates when hobboing cutter and rock face are (xD1+Δl,
yD1cosθ,zD1Sin θ), wherein Δ x is the distance of stretch out and draw back of hobboing cutter, and θ is the rotational angle of cutterhead.
S5: the seat that hobboing cutter and face on TBM cutterhead on the first subregion hit the reflection point of the elastic wave generated is obtained
Mark:
S51: least square method constructed fuction is used:
In the function, riFor the difference of i-th sensor arrival time difference and wave propagation time, tiIt is received for i-th of sensor
Elastic wave arrives duration, t0Active signal source time value is excited for hobboing cutter, (x, y, z) is the reflection point coordinate of elastic wave, (x0,
y0,z0) it is the position coordinates for exciting active signal source, (xi,yi,zi) be i-th of sensor position coordinates, V is tunnel boring
Survey velocity of wave；
S52: the residual sum of squares (RSS) objective function the most when taking theory and observing:
It takes:
A δ X=r, δ X={ δ x0,δy0,δz0}T, X={ x0,y0,z0}T
ATA δ X=ATR, δ X=(ATA)-1ATr
It is iterated calculating according to above formula, X is updated with ω (δ X+X) every time, the final result of iteration will make objective functionReach minimum value, so that it is determined that reflection point coordinate (x, y, z), wherein w F meet newton to go down the hill
Method condition；
S52: when positioning starts, first using the sensor coordinates that trigger at first and then as initial value, Newton-decline method is used
Positioning obtains a positioning result, then using the result as initial value, carries out second using Newton-decline method and positions, and then obtain
Get the positioning result of the reflection point of final elastic wave；
S6: according to step S5, hobboing cutter and face on TBM cutterhead on remaining subregion is successively obtained and hits the elasticity generated
The coordinate of the reflection point of wave；
S7: as TBM is tunneled forward, repeating S3-S6 every one section of fixed range, to obtain the coordinate of more reflection points,
Obtained reflection point coordinate is attached, that is, can determine the structural plane situation of front of tunnel heading.
Specific in the embodiment of the present invention, the embodiment of the present invention can carry out 8 groups of (one group is twice) reflection point positionings, with
TBM is tunneled forward, can be repeated once aforesaid operations with every 10 meters, can be obtained more reflection points, according to engineering practice,
Obtained reflection point coordinate is attached, that is, can determine the structural plane occurrence of front of tunnel heading.In addition, forward with TBM
Continue to tunnel, the information of obtained reflection point is also more and more, this process is also constantly to the sensing point that the last time obtains
It is encrypted and is corrected, the form of unfavorable geologic body is distributed also just increasingly clearer.
In addition, the embodiment of the present invention is also provided with Microseismic monitoring system, sensor, angular transducer and displacement sensor
Data collecting instrument, data collecting instrument built-in signal receiver and digital quantizer are connected, data collecting instrument connects microseism information point
Analysis system.Microseism information analysis system can be laid in TBM control room.Data can be transmitted by optical cable or optical fiber, for counting
According to acquisition and processing.
Following illustrated embodiment is better embodiment of the invention, only is used to facilitate to illustrate the present invention, not to this hair
The bright limitation made under any form has usually intellectual in any technical field, if not departing from the proposed skill of the present invention
In the range of art feature, using the equivalent embodiment for locally changing or modifying made by disclosed technology contents, and
Without departing from technical feature content of the invention, in the range of still falling within the technology of the present invention feature.
Claims (6)
1. one kind is based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method, which is characterized in that the method
Include:
S1: before TBM detritus driving, sensor is laid in the tunnel sidewalls excavated, the sensor is along the tunnel
Length direction is disposed with multilayer sensor, and every layer of sensor includes multiple sensors；
S2: the geodetic coordinates of each hobboing cutter on the geodetic coordinates and TBM cutterhead of sensor, the TBM cutterhead isogonism are obtained
Degree is divided into several subregions, is provided with hobboing cutter on each subregion；
S3: the hobboing cutter on each subregion is made successively to tap face；
S4:TBM is tunneled forward, hits each hobboing cutter on TBM cutterhead successively with face, so that active signal source is excited,
Active signal source, to preceding propagation, reaches weak structural face in rock mass, since normal rock mass and structural plane are respectively Bomi medium
Medium to be dredged with wave, will cause the reflection of elastic wave, the reflection of elastic wave is embedded in the sensor real-time reception of tunnel sidewalls, this
In the process, obtain excitation active signal source position coordinates, and record the hobboing cutter on each subregion tap face time with
And sensor receives the time of elastic wave, and then obtains correspondingly initial firing time matrix and receiving time matrix, into
And obtain the arrival time difference matrix of single impact；
S5: the coordinate that hobboing cutter and face on TBM cutterhead on the first subregion hit the reflection point of the elastic wave generated is obtained:
S51: least square method constructed fuction is used:
In the function, riFor the difference of i-th sensor arrival time difference and wave propagation time, tiElasticity is received for i-th of sensor
Wave arrives duration, t0Active signal source time value is excited for hobboing cutter, (x, y, z) is the reflection point coordinate of elastic wave, (x0,y0,z0)
For the position coordinates for exciting active signal source, (x1, y1, z1) be i-th of sensor position coordinates, V be tunnel boring survey wave
Speed；
S52: the residual sum of squares (RSS) objective function the most when taking theory and observing:
It takes:
A δ X=r, δ X={ δ x0,δy0,δz0}T, X={ x0,y0,z0}T
ATA δ X=ATR, δ X=(ATA)-1ATr
It is iterated calculating according to above formula, X is updated with ω (δ X+X) every time, the final result of iteration will make objective functionReach minimum value, so that it is determined that reflection point coordinate (x, y, z), wherein w F meet newton to go down the hill
Method condition；
S52: it when positioning starts, first using the sensor coordinates that trigger at first and then as initial value, is positioned using Newton-decline method
A positioning result is obtained, then using the result as initial value, second is carried out using Newton-decline method and positions, and then get most
The positioning result of the reflection point of whole elastic wave；
S6: according to step S5, hobboing cutter and face on TBM cutterhead on remaining subregion is successively obtained and hits the elastic wave generated
The coordinate of reflection point；
S7: as TBM is tunneled forward, S3-S6 is repeated every one section of fixed range, to obtain the coordinate of more reflection points, by institute
Obtained reflection point coordinate is attached, that is, can determine the structural plane situation of front of tunnel heading.
2. one kind according to claim 1 is based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method,
It is characterized in that, length direction of the sensor along the tunnel is disposed with multilayer sensor, every layer of sensor includes
Multiple sensors, specifically include:
Length direction interval 30m of the sensor along the tunnel sets gradually the sensor that haves three layers, and every layer of sensor includes 3
A sensor, a sensor in 3 sensors are located at the top of the tunnel sidewalls, 3 sensors
In other two described sensor be symmetricly set on the tunnel sidewalls with the middle vertical plane in the tunnel.
3. one kind according to claim 2 is based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method,
It is characterized in that, the central angle between other two described sensor in 3 sensors is 120 °.
4. one kind according to claim 1 is based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method,
It is characterized in that, the acquisition methods of the position coordinates in the excitation active signal source are as follows:
The geodetic coordinates and hobboing cutter and position coordinates when rock face of the hobboing cutter on each subregion are obtained, specifically
Include:
Obtain the geodetic coordinates (x of the hobboing cutter on each subregionD1,yD1,zD1)；
It controls cutterhead rotation and/or hobboing cutter is flexible, until the hobboing cutter and rock face, obtain the telescopic distance of the hobboing cutter
From；
If cutterhead is located at references angle, and cutterhead does not rotate, and only hobboing cutter is elastic, it is determined that hobboing cutter and face connect
Position coordinates when touching are (xD1+Δl,yD1,zD1), wherein Δ l is the distance of stretch out and draw back of hobboing cutter；
If cutterhead rotates, hobboing cutter is not elastic, it is determined that position coordinates when hobboing cutter and rock face are (xD1+Δl,
yD1,zD1), wherein θ is the rotational angle of cutterhead；
If cutterhead rotates, hobboing cutter is elastic, it is determined that position coordinates when hobboing cutter and rock face are (xD1+Δl,yD1cos
θ,zD1Sin θ), wherein Δ x is the distance of stretch out and draw back of hobboing cutter, and θ is the rotational angle of cutterhead.
5. one kind according to claim 4 is based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method,
It is characterized in that, layout angle sensor on the main drive rod axis of the cutterhead, to determine the rotational angle of cutterhead.
6. one kind according to claim 4 is based on TBM detritus microseism information front of tunnel heading unfavorable geologic body detection method,
It is characterized in that, being provided on the cutterhead and the one-to-one telescoping mechanism of the hobboing cutter, the telescopic end of the telescoping mechanism
Can be flexible along the axially direction for being parallel to the cutterhead, the hobboing cutter is fixed on the telescopic end of the telescoping mechanism；
There are two displacement side lever positioned opposite, the respectively first displacement side levers and second for setting on the circumferential surface of the telescoping mechanism
It is displaced side lever, the first displacement side lever is fixed in the fixing end of the telescoping mechanism, and the second displacement side lever is solid
The telescopic end of the telescoping mechanism, one end sliding of the displacement sensor of the distance of stretch out and draw back for measuring the hobboing cutter are set calmly
On the first displacement side lever, the other end of institute's displacement sensors is fixed on the second displacement side lever for setting,
The change of distance can be measured by institute's displacement sensors between the first displacement side lever and the second displacement side lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910273047.8A CN110045412B (en) | 2019-04-04 | 2019-04-04 | Method for detecting unfavorable geologic body in front of tunnel face based on TBM (Tunnel boring machine) rock fragmentation microseismic information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910273047.8A CN110045412B (en) | 2019-04-04 | 2019-04-04 | Method for detecting unfavorable geologic body in front of tunnel face based on TBM (Tunnel boring machine) rock fragmentation microseismic information |
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| Publication Number | Publication Date |
|---|---|
| CN110045412A true CN110045412A (en) | 2019-07-23 |
| CN110045412B CN110045412B (en) | 2020-07-10 |
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