CN107630711A - A kind of roadway surrounding rock stress and the monitoring device and method of displacement - Google Patents
A kind of roadway surrounding rock stress and the monitoring device and method of displacement Download PDFInfo
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- CN107630711A CN107630711A CN201711015177.9A CN201711015177A CN107630711A CN 107630711 A CN107630711 A CN 107630711A CN 201711015177 A CN201711015177 A CN 201711015177A CN 107630711 A CN107630711 A CN 107630711A
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Abstract
The present invention relates to a kind of roadway surrounding rock stress and the monitoring device of displacement, including a root bead to connect the high-strength deformed steel bar anchor pole of four kinds of multi-form strain rosettes, anchor rod pallet board, two different form of strain rosette and laser range finder.The anchor pole is full length fastening formula anchor pole, and the strain rosette is welded in the both sides up and down of anchor rod body cross-sectional circumference wall, and the laser range finder is connected with anchor pole exposed junction.The beneficial effects of the invention are as follows the monitoring strained using anchor pole deformation synchronous with country rock and strain rosette to different directions, realizes that the integration to surrouding rock stress and displacement monitors；The application of anchor pole exposed junction laser range finder, roadway's sides or the change curve of roof and floor relative displacement can be drawn out.
Description
Technical field
The present invention relates to Geotechnical Engineering and mining engineering field, specifically, is related to a kind of roadway surrounding rock stress and displacement
Monitoring device and method.
Background technology
The scale of tunnel and tunnel construction is increasing in recent years, and length is increasingly longer.Tunnel and tunnel are concealed works,
Potential safety hazard is not easy to be found.Existing tunnel stress and displacement monitoring method are all excessively single both at home and abroad at present, it is impossible to realize
Integration monitoring is, it is necessary to expend a large amount of manpower and materials, along with monitored technology, level monitoring and instrument own limitations
Limitation, be badly in need of now it is a kind of can accurate monitor stress and the device of displacement simultaneously.
Existing roadway surrounding rock stress monitoring：Because country rock body such as is disturbed at the Effects on Engineering, country rock should within this range
Requirement of the actual measurement of power to sensor is higher, and stress measurement is relatively difficult, suitable for such environmental stress measuring method and
Sensor is relatively fewer.Engineering site monitors surrouding rock stress mostly based on drilling hole stress measuring technology at present, and drilling hole stress is surveyed
Examination technology is the major technique of the current monitor stress in China, including stress relief by borehole overcoring technique and borehole stressmeter method of testing.This side
Method need to spend a large amount of manpower and materials, and can not monitor the change of displacement.
Existing roadway surrounding rock displacement monitoring：Displacement measurement mainly passes through multi-point displacement in country rock body both at home and abroad at present
Meter, for observing the displacement along borehole axial.Multipoint displacement meter is divided into string formula according to measuring point anchorage style and (borehole extensometer, drawn
Stretch meter) and rod-type (bar type multipoint displacement meter) two classes；According to data acquisition modes be divided into it is mechanical (dial gauge, digital display centimeter,
Slide measure) and electric measuring type (differential resistance type, inductance type, type vibration wire etc.).Though can be with using the monitoring method of multipoint displacement meter
The change in displacement of country rock is detected, but function is more single, can not carry out the monitoring of roadway surrounding rock stress.
In other words, without displacement anchor pole, there is no Simultaneous Monitoring anchor pole more only for the anchor pole of dynamometry at present.
The content of the invention
Because domestic existing surrouding rock stress, displacement monitoring technology can only solely monitor stress or displacements, it is impossible to real
Existing integration monitoring.In view of the above-mentioned problems, this patent provides a kind of roadway surrounding rock stress that can realize integration monitoring and position
Move monitoring device and method.
Monitoring principle：The monitoring step of the present invention is to monitor the dependent variable of anchor pole by strain rosette first.Because anchor pole with
Country rock fully contacts, so the deformation of anchor pole is the deformation of country rock.It can be asked secondly by the relation of strain and displacement
Go out deflection, so as to obtain surrouding rock deformation and displacement.Force analysis is carried out to anchor pole again, can be measured and enclosed by Newton's third law
The stress variation of rock, so as to realize the monitoring integration of the stress deformation to country rock.
The present invention provides a kind of stress and displacement monitor of roadway surrounding rock, including is changed by the anchor pole for surrounding rock supporting
The component for the measurement country rock strain dressed up, and the various forms of strain rosettes being made up of three foil gauges.The anchor rod component
Including laser range finder, one end that the laser range finder is stayed in outside country rock with anchor pole is connected.
The monitoring that the present invention is strained by strain rosette to anchor pole, is drawn in three dimensions on anchor pole truncation surface using following formula
The components of strain.
Wherein, l1Represent direction cosines of first angle in x directions, m1Represent first angle more than the direction in y directions
String, l2Represent direction cosines of second angle in x directions, m2Represent second angle in the direction cosines in y directions, l3Represent
Direction cosines of 3rd angle in x directions, m3Represent direction cosines of the 3rd angle in y directions.That is, every group should
Becoming flower has three foil gauges, and respectively positioned at three angles, there is one group of direction cosines in each direction, and l is represented more than the direction in x directions
String, m represent the direction cosines in y directions.
The present invention provides a kind of stress and displacement monitor of roadway surrounding rock, including：
Anchor rod component, the anchor rod component include bolt body, anchor rod pallet board and laser range finder, and the bolt body is
Full length fastening formula anchor pole, the laser range finder are connected to exposed one end of bolt body；The anchor rod pallet board is connected to anchor pole
For body close to the side of laser range finder, the bolt body is disposed with pore along axis, the pore for connection strain rosette and
The passage of the data transmission wires of computer；
Strain rosette, the strain rosette is welded on the upper side and lower side of the periphery wall of bolt body, for monitoring rockbolt stress
During bolt body deform when strain regime 3 components of strain εx、εyAnd γxy。
Further, the strain rosette is divided into two groups, and one of which is welded on the periphery wall of bolt body to be at least one
The first strain rosette on side, another group is the second strain at least one periphery wall downside for being welded on bolt body
Flower；
First strain rosette is made up of three foil gauges, and each foil gauge welds with the periphery wall upper side of bolt body
Connect, the angle between adjacent two foil gauges is 45 °；
Second strain rosette is made up of three foil gauges, and each foil gauge welds with the periphery wall upper side of bolt body
Connect, the angle between adjacent two foil gauges is 60 °.
Further, the rangefinder is laser range finder；The bolt body is made up of high-strength deformed steel bar.
The roadway surrounding rock stress and displacement monitor and method of the present invention, not only overcomes simple stress, displacement monitoring
The defects of existing, also integrate two kinds and monitor, it is simple to operate, use manpower and material resources sparingly.The present invention mainly used according to tunnel
The stress balance and strain of country rock and anchor pole and the relation between displacement in journey, propose a set of rational roadway surrounding rock stress
And displacement monitor, so as to ensure that tunnel uses the safety of process.
The present invention also provides the stress and displacement monitoring method of a kind of roadway surrounding rock, is carried out using monitoring device as described above
Monitoring, including following monitoring step：
S1, the strain of both sides above and below bolt body cross section is measured by strain rosette, and x directions strain of averaging to obtain
εx, y directions strain stressyWith shearing strain γxy；
S2, according to rockbolt stress equilibrium relation, stress of the shoulder bed effects to anchor rod pallet board is obtained, and then try to achieve country rock and answer
Power；
S3, the displacement in bolt body loading process is obtained according to the geometrical relationship between strain and displacement, because anchor pole
Synchronously deformed with country rock, and then obtain surrounding rock displacement；
S4, the relative shift-in amount at bottom is helped and pushed up by laser range finder monitoring roadway surrounding rock two.
Further, in step sl, the components of strain that various forms of strain rosettes measure are calculated by following formula：
For the first strain rosette：εx=ε0°,εy=ε90°,γxy=ε0°+ε90°-2ε45°；
For the second strain rosette：
Wherein, εxRepresent the strain of x directions, εyRepresent the strain of y directions, γxyRepresent shearing strain；
The strain of x directions, the strain of y directions and the shearing strain of anchor pole take being averaged for result measured by above-mentioned two groups of strain rosettes
Value.
Further, in step s 2, because anchor pole is after country rock inside is squeezed into, used full length fastening mode causes
Anchor pole and country rock cohere completely, when anchor rod pallet board is circle, because anchor pole fully contacts with rock mass, then to anchor rod body and pallet
Overall progress force analysis is as follows：
The then stress on shoulder bed effects to pallet, i.e. surrouding rock stress are：
Wherein, τf：Shear stress after anchor pole and country rock fully contact on contact surface；σN：Shoulder bed effects are on anchor rod pallet board
Direct stress；D：Pallet diameter；d：Bolt diameter；l：Rock-bolt length；n：Correction factor, it is relevant to contact situation with anchor pole and country rock.
Further, in step s 2, because anchor pole is after country rock inside is squeezed into, used full length fastening cause anchor pole and
Country rock coheres completely, when anchor rod pallet board is square, because rock mass fully contacts, then anchor rod body and pallet is integrally carried out
Force analysis is as follows：
Stress on shoulder bed effects to pallet, i.e. surrouding rock stress are：
Wherein, τf：Shear stress on anchor pole and country rock contact surface；σN：Direct stress on shoulder bed effects to anchor rod pallet board；a：
The pallet length of side；d：Bolt diameter；l：Rock-bolt length；n：Correction factor, it is relevant to contact situation with anchor pole and country rock.
Further, in step s3, by geometrical relationship between displacement and strain be present： It can be derived from：u
=∫ εxdx+C1, v=∫ εydy+C2；
Wherein, u and v is respectively the displacement in the x and y directions of country rock；C1And C2For integral constant.
Further, in step s 4, by the laser range finder of the exposed junction installed in anchor pole measure roadway's sides or
Push up the relative shift-in amount at bottom；
Laser range finder (13) continues to launch laser pulse signal to country rock, and signal is connect by rangefinder again after country rock reflects
The round time t of receipts, laser range finder (13) while tracer signal0If the light velocity is c, then country rock can represent with respect to shift-in amount d
It is as follows：
Beneficial effect of the present invention is：Anchor pole for surrounding rock supporting, which is repacked into, can measure surrouding rock stress, and and can is surveyed
The rod member of country rock strain is measured, realizes the function of anchor pole synchronous force measurement and displacement.The strain rosette being made up of three foil gauges, energy
The stress and strain changing rule of country rock is enough better understood by, it is real so as to obtain the relation between stress-strain, strain-displacement
Now to roadway surrounding rock stress and the Simultaneous Monitoring of displacement.Meanwhile laser range finder is added in anchor pole outer end, to monitor tunnel two
The changing condition of side and roof and floor relative shift；In addition, to improve precision, the data of laser range finder can also be formed in real time
Diagram curve.
Brief description of the drawings
Fig. 1 is the stress of roadway surrounding rock and the structural representation of displacement monitor of the present invention；
Fig. 2 is the stress of roadway surrounding rock and the partial structural diagram of displacement monitor of the present invention；
Fig. 3 is the structural representation of the first strain rosette of the present invention；
Fig. 4 is the structural representation of the second strain rosette of the present invention；
Fig. 5 is the stress of roadway surrounding rock and the force analysis schematic diagram of displacement monitor of the present invention；
Fig. 6 be the present invention a kind of roadway surrounding rock stress and displacement monitor anchor rod pallet board profile；
Fig. 7 be the present invention a kind of roadway surrounding rock stress and displacement monitor anchor rod pallet board profile.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used for the scope of the present invention.
Embodiment 1
The present invention provides a kind of stress and displacement monitor of roadway surrounding rock as shown in Figure 1, including：Anchor rod component 1, institute
Stating anchor rod component 1 includes bolt body 11, anchor rod pallet board 12 and laser range finder 13, and the laser range finder 13 is connected to anchor pole
Exposed one end of body 11；The anchor pole 11 is full length fastening formula anchor pole, and anchor pole 11 is disposed with pore 111 along axis, described
Pore 111 is connection strain rosette and the passage of the data transmission wires of computer；Strain rosette 2, the strain rosette 2 are welded on anchor pole sheet
The upper side and lower side of the periphery wall of the cross section of body 11, for monitoring 3 components of strain ε of strain regime during rockbolt stressx、
εyAnd γxy。
As shown in Fig. 2 the strain rosette 2 is two groups, respectively it is connected on the periphery wall upper side 121 of anchor pole cross section
The first strain rosette and the second strain rosette for being connected on the periphery wall downside 122 of anchor pole cross section；
As shown in figure 3, three foil gauges that first strain rosette is connected by one end form, adjacent two foil gauges it
Between angle be 45 °；
As shown in figure 4, second strain rosette is strained by three joining end to end and forming an equilateral triangle successively
Piece forms, and the angle between adjacent two foil gauges is 60 °.
As further scheme, the rangefinder 13 is laser range finder；The bolt body 11 is by high-strength deformed steel bar
It is made.
In addition, in actual mechanical process, laser range finder 12 is welded on the end face that anchor pole 11 exposes outside country rock.Due to
Engineering-environment is complex in tunnel, need to transform laser range finder profile, it is matched with the size of anchor pole 11.
In addition, the group patch form of strain rosette 2 is to paste one respectively on the horizontal section 121 of anchor pole and vertical section 122
Group, linear distribution.Each strain rosette 2 has wire connection, and wire connects computer, the number that will be monitored through the outlet of pore 111
Computer is passed to when factually, is calculated.
Embodiment 2
The present invention also provides the stress and displacement monitoring method of a kind of roadway surrounding rock, realizes the synchronization of surrouding rock stress and displacement
Monitoring, and reach the purpose of real-time monitored roadway displacement change.
Mainly include following monitoring step：
S1. the strain of two measuring points above and below bolt body cross section is measured by strain rosette, and averages and measures x directions
Strain stressx, y directions strain stressyWith shearing strain γxy；
S2. according to rockbolt stress equilibrium relation, stress of the shoulder bed effects to anchor rod pallet board is obtained, and then tries to achieve country rock and answers
Power；
S3. the displacement in bolt body loading process is obtained according to the geometrical relationship between strain and displacement, and then obtained
Surrounding rock displacement；
S4. the deformation of roadway surrounding rock is monitored by laser range finder.
With the specific data instance in Henan Yong Mei groups outskirts of a town ore deposit tunnel, in the first strain rosette 0 °, 45 ° and 90 ° should
Becoming the data that piece measures is respectively：0.1、0.1、0.08；The data that 0 °, 60 ° and 120 ° of foil gauge measures in second strain rosette
Respectively：0.1、0.1、0.1；
For the first strain rosette：εx=ε0°,εy=ε90°,γxy=ε0°+ε90°-2ε45°；
For the second strain rosette：εx=ε0°,
The average value of two groups of result of calculation is taken, then, the strain of x directions, the strain of y directions and the shearing strain of anchor pole are respectively：
0.1、0.1、0.01。
Because the full length fastening of anchor pole (11) causes anchor pole and country rock to cohere completely, after country rock inside is squeezed into, with rock mass
Fully contact, if anchor rod pallet board is circle, it is as follows that force analysis is integrally carried out to anchor rod body and pallet：
Wherein,
τf：Shear stress on anchor pole and country rock contact surface, it can be measured by the strain rosette on anchor rod body.τfAnd shearing strain
γxyRelation be τf=G γxy, G is the shearing rigidity of steel, and G takes 80GPa；
σN：Direct stress on shoulder bed effects to anchor rod pallet board；
D：Pallet diameter, takes 169mm；
d:Bolt diameter, take 20mm；
l:Rock-bolt length, take 2.0m；
n:Correction factor, it is relevant to contact situation with anchor pole and country rock, takes n=0.25.
That is, the stress on shoulder bed effects to pallet, i.e. surrouding rock stress are
Due to the geometrical relationship between displacement and strain：
： Wherein u and v is respectively x the and y directions of country rock
Displacement.The displacement in x directions is the displacement of anchor pole in the axial direction, and the displacement in y directions is perpendicular to the displacement of bolt diameter, i.e. anchor
The bending that rod axis occur, generally zero.If x zero point is taken as end of the anchor pole in country rock, the end x=of anchor pole axis
When 0, y=0, u=v=0；When middle x=1.0, y=0, u=0.1m, v=0；During exposed junction x=2.0m, y=0, u=0.2m,
V=0.
By the exposed junction laser range finder installed in anchor pole, measurable roadway's sides or the deflection for pushing up bottom；Ranging
Instrument continues to launch laser pulse signal to country rock, and signal is received by rangefinder again after country rock reflects, and rangefinder records letter simultaneously
Number round time t.The light velocity is c, and country rock relative displacement d can represent as follows：
Wherein t0=6.7 × 10-10s, light velocity c=3 × 108m/s.
Claims (9)
1. the stress and displacement monitor of a kind of roadway surrounding rock, it is characterised in that including：
Anchor rod component (1), the anchor rod component (1) include bolt body (11), anchor rod pallet board (12) and laser range finder (13),
The bolt body (11) is full length fastening formula anchor pole, and the laser range finder (13) is connected to exposed the one of bolt body (11)
End；The anchor rod pallet board (12) is connected to bolt body (11) close to the side of laser range finder (13), the bolt body
(11) pore (111) is disposed with along axis, the pore (111) is the logical of the data transmission wires of connection strain rosette and computer
Road；
Strain rosette (2), the strain rosette (2) is welded on the upper side and lower side of the periphery wall of bolt body (11), for monitoring anchor
3 components of strain ε of strain regime when bolt body (11) deforms in bar loading processx、εyAnd γxy。
2. the stress and displacement monitor of roadway surrounding rock according to claim 1, it is characterised in that the strain rosette
(2) it is divided into two groups, one of which should for first at least one periphery wall upper side (121) for being welded on bolt body (11)
Become flower, another group is the second strain rosette at least one periphery wall downside (122) for being welded on bolt body (11)；
First strain rosette is made up of three foil gauges, periphery wall upper side of each foil gauge with bolt body (11)
(121) weld, the angle between adjacent two foil gauges is 45 °；
Second strain rosette is made up of three foil gauges, periphery wall upper side of each foil gauge with bolt body (11)
(121) weld, the angle between adjacent two foil gauges is 60 °.
3. the stress and displacement monitor of roadway surrounding rock according to claim 1, it is characterised in that the rangefinder
(13) it is laser range finder；The bolt body (11) is made up of high-strength deformed steel bar.
4. the stress and displacement monitoring method of a kind of roadway surrounding rock, it is characterised in that using such as any one of claims 1 to 3 institute
Monitoring device is stated to be monitored, including following monitoring step：
S1, the strain of both sides above and below bolt body cross section is measured by strain rosette, and x directions strain stress of averaging to obtainx, y side
To strain stressyWith shearing strain γxy；
S2, according to rockbolt stress equilibrium relation, stress of the shoulder bed effects to anchor rod pallet board is obtained, and then try to achieve surrouding rock stress；
S3, the displacement in bolt body loading process is obtained according to the geometrical relationship between strain and displacement, due to anchor pole and enclosed
Rock synchronously deforms, and then obtains surrounding rock displacement；
S4, the relative shift-in amount with roof and floor is helped by laser range finder monitoring roadway surrounding rock two.
5. the stress and displacement monitoring method of roadway surrounding rock according to claim 4, it is characterised in that in step sl,
The components of strain that various forms of strain rosettes (2) measure are calculated by following formula：
For the first strain rosette：εx=ε0°,εy=ε90°,γxy=ε0°+ε90°-2ε45°；
For the second strain rosette：εx=ε0°,
Wherein, εxRepresent the strain of x directions, εyRepresent the strain of y directions, γxyRepresent shearing strain；
The strain of x directions, the strain of y directions and the shearing strain of anchor pole take the average value of result measured by above-mentioned two groups of strain rosettes.
6. the stress and displacement monitoring method of roadway surrounding rock according to claim 5, it is characterised in that in step s 2,
Because anchor pole (11) is after country rock inside is squeezed into, used full length fastening mode causes anchor pole and country rock to cohere completely；Work as anchor
Lever bracket disk for it is circular when, because anchor pole fully contacts with rock mass, then it is as follows that force analysis is integrally carried out to anchor rod body and pallet：
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The then stress on shoulder bed effects to pallet, i.e. surrouding rock stress are：
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Wherein, τf：Shear stress after anchor pole and country rock fully contact on contact surface；σN：Just should on shoulder bed effects to anchor rod pallet board
Power；D：Pallet diameter；d：Bolt diameter；l：Rock-bolt length；n：Correction factor, it is relevant to contact situation with anchor pole and country rock.
7. the stress and displacement monitoring method of roadway surrounding rock according to claim 5, it is characterised in that in step s 2,
Because anchor pole (11) is after country rock inside is squeezed into, used full length fastening causes anchor pole and country rock to cohere completely；When anchor pole support
When disk is square, because rock mass fully contacts, then it is as follows that force analysis is integrally carried out to anchor rod body and pallet：
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Stress on shoulder bed effects to pallet, i.e. surrouding rock stress are：
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Wherein, τf：Shear stress on anchor pole and country rock contact surface；σN：Direct stress on shoulder bed effects to anchor rod pallet board；a：Pallet
The length of side；d：Bolt diameter；l：Rock-bolt length；n：Correction factor, it is relevant to contact situation with anchor pole and country rock.
8. the stress and displacement monitoring method of roadway surrounding rock according to claim 5, it is characterised in that in step s3,
By geometrical relationship between displacement and strain be present： It can be derived from：U=∫ εxdx+C1, v=∫ εydy+C2；
Wherein, u and v is respectively the displacement in the x and y directions of country rock；C1And C2For integral constant.
9. the stress and displacement monitoring method of roadway surrounding rock according to claim 5, it is characterised in that in step s 4,
The relative shift-in amount of roadway's sides or roof and floor is measured by the laser range finder (13) of the exposed junction installed in anchor pole；
Laser range finder (13) continues to launch laser pulse signal to country rock, and signal is received by rangefinder again after country rock reflects,
The time t that laser range finder (13) while tracer signal come and go0If the light velocity is c, then country rock can represent such as with respect to shift-in amount d
Under：
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| CN201711015177.9A CN107630711B (en) | 2017-10-25 | 2017-10-25 | A kind of monitoring device and method of roadway surrounding rock stress and displacement |
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| CN201711015177.9A CN107630711B (en) | 2017-10-25 | 2017-10-25 | A kind of monitoring device and method of roadway surrounding rock stress and displacement |
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| CN107630711B CN107630711B (en) | 2019-08-16 |
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| CN108709588A (en) * | 2018-07-23 | 2018-10-26 | 山西大同大学 | A kind of multi-parameter monitoring devices and preparation method thereof for roadway surrounding rock |
| CN108981814A (en) * | 2018-07-23 | 2018-12-11 | 山西大同大学 | It is a kind of for monitoring the device and method of roadway surrounding rock real-time parameter |
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| CN109555502A (en) * | 2018-11-13 | 2019-04-02 | 山西潞安环保能源开发股份有限公司常村煤矿 | A kind of antireflective type approval test method of high methane coal road presplitting |
| CN109470151A (en) * | 2018-11-28 | 2019-03-15 | 中国矿业大学 | A kind of continuous monitoring record lane surface displacement device and method |
| CN109518736A (en) * | 2018-12-21 | 2019-03-26 | 河海大学 | A kind of more vector slope monitoring anchor poles and monitoring method based on Beidou positioning |
| CN110067582A (en) * | 2019-05-05 | 2019-07-30 | 中国矿业大学 | For surrounding rock supporting, the anchor pole and its installation method of instability monitoring |
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| CN111062087B (en) * | 2020-01-10 | 2022-06-21 | 西南交通大学 | Anchor length design method based on displacement difference/gradient in underground engineering |
| CN111062087A (en) * | 2020-01-10 | 2020-04-24 | 西南交通大学 | Anchor length design method based on displacement difference/gradient in underground engineering |
| CN111551300A (en) * | 2020-05-12 | 2020-08-18 | 湖北兴业华德威安全信息技术股份有限公司 | Method for monitoring total anchoring force of whole-body type anchor rod by utilizing linear displacement sensor |
| CN111780805B (en) * | 2020-06-05 | 2022-04-05 | 中国葛洲坝集团第一工程有限公司 | Anchor cable type rock mass stress-strain detection system and method |
| CN111780805A (en) * | 2020-06-05 | 2020-10-16 | 中国葛洲坝集团第一工程有限公司 | Anchor cable type rock mass stress-strain detection system and method |
| CN111638119A (en) * | 2020-07-23 | 2020-09-08 | 兰州理工大学 | Slurry-soil interface strain testing method for earthen site anchoring system |
| CN112504333A (en) * | 2020-11-13 | 2021-03-16 | 贵州大学 | Tunnel vertical settlement and arch wall compressive stress monitor and cloud monitoring and early warning system |
| CN112629586A (en) * | 2020-12-03 | 2021-04-09 | 武汉理工大学 | Synchronous measuring equipment for internal displacement and apposition stress of rock mass |
| CN112796809A (en) * | 2020-12-31 | 2021-05-14 | 河海大学 | Monitoring device and monitoring method for constant-resistance large-deformation anchor cable |
| CN114486495A (en) * | 2022-01-26 | 2022-05-13 | 中铁七局集团有限公司 | Pipeline internal pressure and deformation experimental device and detection method |
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| CN115541075A (en) * | 2022-11-25 | 2022-12-30 | 云南省交通发展投资有限责任公司 | Measuring probe for shallow tunnel surrounding rock stress, mounting equipment and using method |
| CN115541075B (en) * | 2022-11-25 | 2023-03-03 | 云南省交通发展投资有限责任公司 | Measuring probe for shallow tunnel surrounding rock stress, mounting equipment and using method |
| CN116950701A (en) * | 2023-05-06 | 2023-10-27 | 中山大学 | Rock-soil anchoring measurement integrated monitoring device |
| CN116950701B (en) * | 2023-05-06 | 2024-03-26 | 中山大学 | Rock-soil anchoring measurement integrated monitoring device |
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