CN105952465B - A kind of country rock and complete-section tunnel boring machine shield interaction process monitoring method - Google Patents
A kind of country rock and complete-section tunnel boring machine shield interaction process monitoring method Download PDFInfo
- Publication number
- CN105952465B CN105952465B CN201610361371.1A CN201610361371A CN105952465B CN 105952465 B CN105952465 B CN 105952465B CN 201610361371 A CN201610361371 A CN 201610361371A CN 105952465 B CN105952465 B CN 105952465B
- Authority
- CN
- China
- Prior art keywords
- shield
- measuring point
- country rock
- extruding force
- complete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011435 rock Substances 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 230000003993 interaction Effects 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 238000009434 installation Methods 0.000 claims abstract description 23
- 238000009826 distribution Methods 0.000 claims abstract description 8
- 230000005641 tunneling Effects 0.000 claims abstract description 5
- 238000009412 basement excavation Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000012502 risk assessment Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000012795 verification Methods 0.000 claims description 2
- 238000010998 test method Methods 0.000 abstract description 2
- 238000000205 computational method Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
Abstract
The invention discloses a kind of country rock and shield interaction process test method, steps：A, pressure cell cable is inserted in flexible wire bushing pipe introducing shield in shield outer surface for directly testing extruding force of the country rock to shield and connects readout instrument by welded and installed；B, in the circumferential and longitudinal respectively one surface strain sensor of installation in each monitoring point of shield inner surface, by the shield inner surface circumferential direction tested and longitudinal strain, country rock is gone out to shield extruding force according to principle of elasticity inverse；C, the frictional resistance suffered by shield, if the extruding force linear distribution between adjacent two measuring point, is calculated to the shield extruding force regularity of distribution according to the country rock tested；D, according to card machine condition discrimination criterion and card machine risk factor computational methods, whether calculating judges shield by card, early warning card machine risk class.It solves shield formula TBM tunneling processes country rock and shield interaction monitoring problem, basis is provided for card machine Accident Forecast Anais, be of great significance to TBM driving safety.
Description
Technical field
The present invention relates to country rocks and supporting construction interaction monitoring method field, are more particularly to a kind of TBM drivings item
Country rock and TBM shield interaction process monitoring methods under part, it can also be used to test load of the country rock to other supporting construction.
Background technology
Shield formula complete-section tunnel boring machine (TBM) can to tunnel progress synchronous with section of jurisdiction is installed, and drivage efficiency is high,
Construction safety is widely used in tunnel piercing.However, TBM generally requires to wear in Deep-buried Long And Big Tunnels and deep-well tunnel are built
More large deformation easily occurs for some high-ground stress weakness, broken rock, country rock.When the deflection of shield region country rock is more than to excavate in advance
During deformation gap between the country rock and shield that stay, country rock starts that shield, and then the country rock when TBM is promoted are contacted and squeezed with shield
Frictional resistance is generated to shield, just TBM is caused to protect when the thrust that TBM propulsion systems provide is not enough to overcome frictional resistance suffered by shield
Shield is by card or even shield is caused to damage.TBM card machine accidents from mechanical essence for be exactly contact between country rock and shield-squeeze
Pressure-friction interaction.Therefore, judge TBM card machine accidents to predict, be highly desirable the phase of test country rock and TBM shields
Interaction.Wherein country rock is the key that country rock monitors, but with shield interaction process due to following to the test of shield extruding force
Reason, still there are no monitoring country rocks and the maturation method of shield interaction process both at home and abroad at present：
(1) TBM producers are not due to having testing requirement, therefore there is no assembling test country rock extruding forces in design production manufacture
Sensor.
(2) unit in charge of construction is also often that the measure of overcoming difficulties just passively is taken when there is card machine accident, and seldom in advance into
The real-time monitoring of row surrouding rock deformation and country rock to shield extruding force.
(3) due to the prearrangement of deformation amount gap very little between country rock and shield, usually 5~10cm, observation space is narrow, and
As TBM is constantly tunneled forward, shield will generate Relative sliding with country rock, and many sensings and monitoring device are difficult to be mounted on this
In narrow observation space, even with some flat thin shapes sensor installation after will shield with TBM tunnel move forward when
The country rock for the surface irregularity being accessed is ruined to scratching to fall or squeeze, thus there is presently no special test country rock with
The test method of shield interaction process.
In view of that is reserved between country rock and shield when TBM is excavated digs the characteristics of deformation gap is small, and the test space is narrow, this
Patent of invention proposes a kind of country rock and TBM shields interaction monitoring method.
Invention content
In order to solve the problems, such as country rock and complete-section tunnel boring machine (TBM) shield interaction process real-time testing, this
The purpose of invention is to be the provision of a kind of country rock and complete-section tunnel boring machine (TBM) shield interaction process monitoring side
Method, easy to implement the method, easy to operate, which can not only test at certain point country rock to the extruding force of shield, moreover it is possible to test
Country rock is contacted with shield since where, the regularity of distribution of contact range and extruding force, moreover it is possible to be calculated between country rock and shield
Whether frictional resistance judges shield by card so as to predict.
In order to realize above-mentioned purpose, the present invention uses following technical scheme：
A kind of country rock and complete-section tunnel boring machine (TBM) shield interaction process monitoring method, step are：
(1) country rock monitors shield extruding force：It is directly measured and shield inner surface using shield outer surface installation pressure cell
Installation surface strain transducer measures the method being combined indirectly.It is specific as follows：
1. shield outer surface installation pressure cell directly tests country rock to shield extruding force：
It devises a kind of for testing pressure cell of the country rock to shield extruding force, makes full use of this kind of micro pressure box body product
Small, raised pressure contact can directly measure country rock at the measuring point and, to the extruding force of shield, pressure cell is fixed on shield
Shield outer surface measuring country rock is to shield extruding force.It includes cup-shaped base, annular box cover, pressure sensor and wire bushing pipe,
Connection relation is：The bottom of cup-shaped base is welded on shield outer surface, screw pitch is carved in the range of the 8mm of cup-shaped base upper end
The outside screw of 1mm, and open a square groove in cup-shaped base upper end；Pressure sensor is put into cup-shaped base, by pressure
The pressure sensor cable that sensor carries is pierced by from cup-shaped base upper recess, is covered around pressure sensor cable
Upper wire bushing pipe；A top annular box cover is made, has box cover outer edge in the outermost end of annular box cover, in annular box cover outer edge
The inside thread of screw pitch 1mm is inside carved with, Radius is opened at annular box cover center and is the circular hole of 10mm, then annular box cover is covered,
Cup-shaped base and annular box cover are connected through a screw thread；The pressure contact of pressure sensor exposes from annular box cover center hole.
Its structural relation and installation method are：One upper end of processing and fabricating is there are groove and carves threaded cup-shaped base, during on-the-spot test
Cup-shaped base bottom is welded on complete-section tunnel boring machine (TBM) shield outer surface, for placement force sensor and is incited somebody to action
Sensor is fixed on testee complete-section tunnel boring machine (TBM) shield outer surface, and resistance is played in monitoring and test
Country rock and the effect of the shearing force after sensor contacts when complete-section tunnel boring machine (TBM) moves forward；The bottom is treated during in-site installation
Pressure sensor is put into this cup-shaped base after seat welding cooling, by sensor cable line from cup-shaped base upper recess
It draws, and flexible steel loop wire bushing pipe is laid for protecting cable in order to avoid being contacted when shield moves forward around cable
Rock squeeze, abrasion；Making is provided with center hole, threaded annular box cover is carved in outer edge inside, covers internal placement
Pressure sensor, and the pressure contact of sensor is exposed, it can be contacted with the country rock of surrounding；Treat that pressure sensor is put into cup
The annular box cover is covered after shape pedestal, annular box cover is connect with cup-shaped base by screw threads for fastening, at this time pressure sensor top
The pressure contact in portion exposes from annular box cover center hole, just constitutes test country rock and complete-section tunnel boring machine (TBM) is protected
The pressure cell of shield extruding force.Pressure cell is arranged to array test country rock to be distributed shield extruding force：Encircle in shield outer surface
Totally five rows, often ten installation pressure cells of row are helped in top, two shoulders of left and right and left and right two, see Fig. 1 and Fig. 2.By all pressures in shield outer surface
Power box cable concentration is merged into stock and introduces in shield, and protective cable wire casing pipe is glued using AB glue with shield outer surface box hat
Knot is secured, convenient for measuring, a real-time testing country rock is thus formed in shield outer surface, the array of shield extruding force is tested
Network.The cable for introducing space in shield is accessed into data collecting instrument, reads data, what i-th of pressure cell of note was measured squeezes
Pressure is Pi。
2. shield inner surface strain testing, inverse country rock is to shield extruding force
At shield inner surface installation surface strain transducer (type vibration wire or fiber Bragg grating type surface strain sensor).It is protecting
Totally five rows, often ten measuring points of row are helped in shield inner surface vault, two shoulders of left and right and left and right two.Each measuring point circumferential direction and longitudinal direction are respectively mounted one
A strain transducer (see Fig. 1 and Fig. 2), longitudinal sensor are used to test shield longitudinal strainHoop strain sensor is used for
Test shield hoop strain εθ, the strain of longitudinal direction and circumferential both direction at the i-th measuring point is measured accordinglyWithEach measuring point
Place's infinitesimal stress squeezes shield as shown in fig. 6, country rock at this measuring point can be calculated according to principle of elasticity
Pressure Pi'：
Wherein：For the i-th measuring point infinitesimal longitudinal strain,For the i-th measuring point infinitesimal hoop strain；For the i-th measuring point infinitesimal
Longitudinal stress；For the i-th measuring point infinitesimal circumference stress, Pi' it is the equivalent country rock suffered by the i-th measuring point infinitesimal to shield extruding force；E
For shield bullet mould, μ is shield Poisson's ratio.
Complete-section tunnel boring machine (TBM) shield does not constrain at both ends in the longitudinal direction, is free boundary, therefore set each survey
Longitudinal stress at pointThen above formula (1), (2) can be write as：
It solves：
Pressure cell is installed at vault in outer surface simultaneously and in inner surface installation axle to, circumferential surface strain transducer,
The extruding force P that then pressure cell at vault same observation station is measurediThe equivalent extruding force P obtained with shield inner surface strain inversei'
Verification is compared, coefficient between the two is denoted as k：
Data are shown in shield also substantially conforms to same proportionate relationship at other strain measuring points, then shield inner surface strains
Extruding force P suffered by corresponding shield outer surface at i-th measuring pointiFor：
Pi=kPi' (8)
(2) frictional resistance suffered by shield is calculated by measuring the obtained extruding force regularity of distribution.
Due to closer to the distance between measuring point, it is therefore assumed that the extruding force between adjacent measuring point obeys linear distribution, as shown in Figure 2.
And two halves shape, stress above and below shield are considered as symmetrically.Therefore, obtain corresponding to each ring monitoring measuring point because
Frictional resistance suffered by the shield that country rock extruding force generates
In formula：For (j=1,2,3 ... 10), and f is country rock for frictional resistance suffered by the corresponding shield in jth ring monitoring measuring point region
Friction coefficient between shield, PiFor circumferential i-th measuring point country rock, to shield extruding force, (i=1,2,3 ... 8), Pi+1For (i+1)
Measuring point country rock is to shield extruding force, chord lengths of the L between the i-th measuring point and (i+1) measuring point, RsFor shield internal diameter, αiFor the i-th measuring point
The corresponding central angle between (i+1) measuring point, spacing of the Δ l between longitudinally adjacent measuring point.
The frictional resistance that every ring monitoring measuring point is calculated is added to add to conduct oneself with dignity because of complete-section tunnel boring machine (TBM) and is produced
Raw frictional resistance just obtains total frictional resistance R suffered by shieldf：
In formula：RfFor frictional resistance total suffered by shield, W conducts oneself with dignity for complete-section tunnel boring machine (TBM), and j is monitors on longitudinal direction
The serial number (j=1,2,3 ... 10) of measuring point.
(3) based on card machine condition discrimination criterion, according to frictional resistance and tunneling boring tunnel digging suffered by the shield tested and calculated
The thrust magnitude relationship provided into machine (TBM) propulsion system, calculates card machine risk factor and prediction judges whether that card machine occurs.Its
In, card machine condition discrimination criterion is：
In formula：FbFor complete-section tunnel boring machine (TBM) machine normally thrust, F needed for continuous digging excavationIFor tunneling boring
The normal thrust that rock tunnel(ling) machine (TBM) propulsion system can be provided；FrTo overcome the required thrust of frictional resistance suffered by shield,
Equal to frictional resistance suffered by shield：
Fr=Rf (12)
Differentiate complete-section tunnel boring machine (TBM) shield whether by card accordingly.
The risk factor K of complete-section tunnel boring machine (TBM) card machinesIt is defined as：
In formula：FfFor the required gross thrust of complete-section tunnel boring machine (TBM) driving Forward.
The risk factor of card machine is calculated accordingly, carries out card machine risk analysis.It will be broken entirely according to the risk factor size of calculating
Face rock tunnel(ling) machine (TBM) card machine risk is divided into level Four：Not card machine, slight card machine, serious card machine and very serious card machine, such as
Shown in table 1.
Table 1TBM card machine state risk stratifications
| Ksg | TBM card machine risk class |
| Ks<1 | Not card machine |
| 1≤Ks<1.2 | Slight card machine |
| 1.2≤Ks<1.5 | Serious card machine |
| Ks≥1.5 | Very serious card machine |
Compared with prior art, the present invention haing the following advantages and effect：
(1) while country rock is directly measured using shield outer surface installation pressure cell to pacify shield extruding force and shield inner surface
Dress surface strain sensor measures extruding force indirectly so that measuring instrument installation is simpler, firm, and measurement result more may be used
It leans on.
(2) the test country rock that designed, designed makes is to the pressure cell of shield extruding force when testing installation, and welding high temperature is not
It can be transmitted on pressure sensor, sensor internal structure will not be damaged, and can ensure that internal pressure sensor will not be with
Shield and TBM move forward and are scratched and fall and damage.
(3) frictional resistance and judge shield whether by card according to suffered by test result can calculate shield.
This method has been used to carry out country rock in certain engineering shield formula TBM to try with shield interaction process monitoring field
Test, be mounted in the TBM shields outer surface test country rock to the pressure cell of shield extruding force, it is circumferential and axial in shield inner surface
It is mounted with type vibration wire and fiber Bragg grating type surface strain sensor, mounting means in the middle part of shield as shown in Fig. 2, wherein once supervise
The test result for surveying section is as shown in table 2：
2 shield formula TBM country rocks of table and shield interaction monitoring result (symbol to press as just, to draw be negative)
Note：Parameter value in formula (5), (6) and (9)：E=212GPa, μ=0.2, f=0.35, Rs=4m, L=1m, W=
20MN。
The K=0.81227 of this ring monitoring measuring point is calculated, and according to suffered by being calculated this ring shield in formula (9)
Frictional resistanceThe frictional resistance addition that other each ring monitoring sections are calculated is added according to formula (10)
Total frictional resistance suffered by shield can be calculated in frictional resistance caused by TBM conducts oneself with dignity, so as to calculate card according to formula (11) and formula (13)
Machine risk factor and prediction judge whether card machine, therefore can realize country rock and TBM shield interaction processes using this method
Monitoring, can predict and judge TBM shields whether by casey.
Description of the drawings
Fig. 1 is a kind of country rock and shield interaction test sensor complete layout.
Fig. 2 is a kind of point layout cross-sectional view.
Fig. 3 is a kind of pressure cell entirety front view of test country rock to TBM shield extruding forces.
Fig. 4 is a kind of cup-shaped base vertical view.
Fig. 5 is a kind of annular box cover vertical view.
Fig. 6 is the stress state figure that a kind of shield inner surface strains measuring point infinitesimal.
In figure：1. shield outer surface, 2. complete-section tunnel boring machines (TBM) cutterhead, 3. pressure cells, 4. pressure cell cables
Line, 5. shield inner surfaces, 6. circumferential surface strain transducers, 7. longitudinal surface strain transducers, 8. surface strain sensors electricity
Digging between cable, 9. country rocks, 10. complete-section tunnel boring machines (TBM) outline excavation, 11. shields, 12. country rocks and shield is pre-
Stay deformation gap, 13. cup-shaped bases, 14. annular box covers, 15. pressure sensor (models：YY-C125-10KN) main body, 16. shields
Thread casing, 17. cup-shaped base upper end outside screws, 18. cup-shaped base upper recess, 19. pressure sensor cables, 20. boxes
Lid center hole, 21. annular box cover outer edge inside threads, 22. pressure sensor (models：YY-C125-10KN) pressure is touched
Head.
Specific embodiment
Embodiment 1：
The present invention is described in further detail below in conjunction with the accompanying drawings.
The present invention carries out country rock and the test of shield extruding force, frictional resistance suffered by shield is calculated and card machine condition discrimination successively
Country rock is monitored with shield interaction process, a kind of country rock and complete-section tunnel boring machine shield interaction process monitoring side
Method, step are：
First, test of the country rock to shield extruding force：Shield inner surface strain testing inverse country rock is to shield extruding force：
(1) extruding force is directly tested in shield outer surface：
A kind of pressure cell of country rock to shield extruding force is designed and produced, pressure cell is passed by cup-shaped base, annular box cover, pressure
Sensor and wire bushing pipe composition, select according to the size for digging prearrangement of deformation amount gap 12 between country rock and shield formula TBM shields
15 size of pressure sensor (height is denoted as h, and internal diameter is denoted as r, and the present embodiment selects pressure sensor model as YY-C125-10KN,
Its size is h=11.5mm, r=13mm), according to the size of the diameter of pressure sensor 15 and height design cup-shaped base 13
(cup-shaped base high H=h+20mm, internal diameter Ri=r, outer diameter Ro=r+5mm), vehicle goes out cup-shaped base 13 from stainless steel cast iron,
The outside screw 17 of screw pitch 1mm is processed in the range of 13 upper end 8mm of cup-shaped base, a square groove 18 is opened in cup-shaped base upper end
(height=wide=2 times of pressure sensor cable diameters), cup-shaped base 13 is for placement force sensor 15 and by pressure sensing
Device 15 is fixed on testee shield outer surface 1；And according to the diameter of pressure sensor 15, the height of pressure contact 22 and straight
14 (annular box cover internal diameter R of diameter design top annular box coveri'=cup-shaped base outer diameter Ro=r+5mm, outer diameter R'o=internal diameter+5mm,
Center hole radius R'=10mm, outer edge height H'=8mm, base thickness ),
The circular hole 20 that Radius is 10mm, the inner surface on the inside of 14 outer edge of top annular box cover are opened at 14 center of top annular box cover
The inside thread 21 of screw pitch 1mm is made, for fixation pressure sensor, structure refers to Fig. 1.The stage is assembled in TBM or TBM passes through
Tunnel midway overhauls, disassembles when openr cavern, and pressure cell 3 is installed in shield outer surface 1 and monitors country rock to shield extruding
Power, installation steps are：1. the pressure cell cup-shaped base 13 made is welded on designed 1 monitoring point of shield outer surface, treat
Pressure sensor 15 is put into cup-shaped base 13 after cooling, and the cable 19 that sensor is carried is recessed from cup-shaped base upper end
It draws, is penetrated in flexible wire bushing pipe 16 in slot 18, screw thread between cup-shaped base 13 and annular box cover 14 is tightened, by pressure sensing
Device pressure contact 23 exposes from annular box cover center hole 20, is just mounted with a measurement country rock pair in shield outer surface in this way
The pressure cell of TBM shield extruding forces；2. shield is considered as symmetrical above and below, and installation convenience is considered, therefore only in shield upper half
Section installation monitoring point, in other monitoring points of shield outer surface using same method installation test country rock to the pressure of shield extruding force
Box, totally five rows, often arranges ten, and often row longitudinal direction is equally spaced, and all concentrations of pressure cell cable 4 in shield outer surface are merged into
Stock is introduced in shield, and protective cable wire casing pipe uses AB glue (model：Deli7148) jail is bonded with shield outer surface box hat
Gu convenient for measuring；3. the cable for introducing space in shield is accessed data collecting instrument, data are read, what the i-th measuring point was measured
Country rock is denoted as P to shield extruding forcei。
To the pressure cell of complete-section tunnel boring machine (TBM) shield extruding force, it includes a kind of test country rock：Cup-shaped base
13rd, annular box cover 14, pressure sensor 15 and wire bushing pipe 16.Its connection relation is：The bottom of cup-shaped base 13 is welded on
The outside screw 17 of screw pitch 1mm is carved in the range of 13 upper end 8mm of cup-shaped base, and on cup-shaped base 13 in shield outer surface
Open a square groove 18 in end；The outermost end margin of top annular box cover 14 is carved with the inside thread 21 of 1mm, in top annular box cover
Open the center hole 20 of Radius 10mm in 14 center；Pressure sensor 15 is put into cup-shaped base 13, by pressure sensor
15 included pressure sensor cables 19 are pierced by from 13 upper end cup-shaped base upper recess 18 of cup-shaped base, in pressure sensing
Wire bushing pipe 16 is put on around device cable 19, then annular box cover 14 is covered, by spiral shell between cup-shaped base 13 and annular box cover 14
Line connects (tightening), while the included pressure sensor pressure contact 22 of pressure sensor 15 is from annular 14 center hole 20 of box cover
Expose, just constitute and measure pressure cell of the country rock to TBM shield extruding forces.Connection between each building block of the pressure cell is closed
System：Size according to prearrangement of deformation amount gap is digged between country rock and shield formula TBM shields selects pressure sensor 15, and (size height is remembered
For h, internal diameter is denoted as r, and the pressure sensor model that the present embodiment selects is YY-C125-10KN, size h=11.5mm, r
=13mm), according to the size of the diameter of pressure sensor 3 and height design cup-shaped base 1 (cup-shaped base high H=h+20mm, it is interior
Diameter Ri=r, outer diameter Ro=r+5mm), vehicle goes out cup-shaped base 13 from stainless steel cast iron, in the range of 13 upper end 8mm of cup-shaped base
The outside screw 17 of screw pitch 1mm is carved with, 18 (height=wide=2 times of sensor cables of a square groove are opened in 13 upper end of cup-shaped base
Linear diameter), cup-shaped base 13 is interior to be fixed to testee shield outer surface 1 for placement force sensor 15 and by sensor 15
On；And according to the size (ring of the diameter of pressure sensor 15, the height of pressure contact 22 and diameter design top annular box cover 14
14 internal diameter R of shape box coveri'=cup-shaped base outer diameter Ro=r+5mm, outer diameter R'o=internal diameter+5mm, center hole radius R'=10mm,
The pressure contact height of outer edge height H'=8mm, base thickness δ=1/3), at top, the center that Radius is 10mm is opened at 2 center of box cover
Circular hole 20 makes the inside thread 22 of screw pitch 1mm in the inner surface of 14 outermost end margin 21 of top annular box cover, is pressed for fixed
Force snesor 15；During on-the-spot test, the bottom of cup-shaped base 13 is welded on shield outer surface 1, after cooling, by pressure sensing
Device 15 is put into cup-shaped base 13, and the pressure sensor cable 19 that pressure sensor 15 is carried is recessed from 13 upper end of cup-shaped base
It is pierced by slot 6, wire bushing pipe 16 is covered around pressure sensor cable 19, then annular box cover 14 is covered, by cupuliform bottom
Screw thread is tightened between seat 13 and annular box cover 14, while the pressure contact 22 that pressure sensor 15 carries reveals from box cover center hole 20
Go out, just constitute and measure country rock to the pressure cell 3 of TBM shield extruding forces, structure refers to Fig. 3, Fig. 4 and Fig. 5.
(2) shield inner surface installation surface strain transducer by strain testing inverse country rock to shield extruding force：
Ten totally five rows, often row's setting monitoring measuring points are helped in shield inner surface vault, two shoulders of left and right and left and right two, respectively
AB glue is used by surface strain sensor (type vibration wire or fiber Bragg grating type or two in the monitoring point circumferential direction and longitudinal direction of design
Type uses) shield inner surface (hoop strain sensor 6, longitudinal strain sensor 7) is pasted onto, by sensor cable line
8 concentrations are merged into stock and are connect with readout instrument or universal data collection instrument DataTaker, and real-time continuous reading data are surveyed i-th
Point longitudinal strain strain transducer reading is denoted asI-th measuring point hoop strain strain transducer reading is denoted asThink that shield exists
Flexible deformation rule is obeyed before yield failure, according to following equation inverse country rock to shield extruding force：
In formula：For the longitudinal strain that the i-th measuring point is measured,For hoop strain；Pi' for suffered by infinitesimal at the i-th measuring point
Equivalent country rock to shield extruding force；E is shield bullet mould, and μ is shield Poisson's ratio.
The extruding force P that then pressure cell at vault same observation station is measurediThe equivalent extruding force P obtained with strain inversei' into
Row relatively verifies that coefficient between the two is denoted as k：
Then shield inner surface strains extruding force P suffered by corresponding shield outer surface at other measuring points (the i-th measuring point)iFor：
Pi=kPi' (16)
Second, according to the country rock tested out to the shield extruding force regularity of distribution, it can be obtained and enclosed according to card machine trigger condition
Rock contacts starting point, calculating country rock total frictional resistance R to shield with shieldf：
In formula：RfFor frictional resistance total suffered by shield, j is that (j=1,2,3 ... 10), and f is encloses for the serial number of monitoring measuring point on longitudinal direction
Friction coefficient between rock and shield, PiFor circumferential i-th measuring point country rock, to shield extruding force, (i=1,2,3 ... 8), Pi+1For (i+
1) measuring point country rock conducts oneself with dignity to shield extruding force, W for TBM, RsFor shield internal diameter, αiIt is corresponding between (i+1) measuring point for the i-th measuring point
Central angle.
In the present embodiment, by the shield inner surface strain measuring point of the i-th measuring point and (i+1) measuring point, that is, adjacent and shield appearance
Face measuring point is equally spaced, then corresponding central angle is：
αi=22.5 ° (18)
Formula (18) is substituted into formula (17), is obtained：
Third, according to card machine condition discrimination criterion judge TBM shields whether by card and identification card machine risk class, it is right
Card machine accident carries out early warning.
Fr=Rf (20)
In formula：FbFor TBM machines normally thrust, F needed for continuous digging excavationIIt can be provided for TBM propulsion systems specified
Thrust.
In addition, it can also calculate the safety coefficient K of TBM card machiness, see formula (13).It is safely according to the card machine being calculated
Number KsCard machine risk analysis is carried out, refers to table 1.
Claims (1)
1. a kind of country rock and complete-section tunnel boring machine shield interaction process monitoring method, step are：
(1) country rock monitors shield extruding force：It is directly measured using shield outer surface installation pressure cell and shield inner surface is installed
Surface strain sensor is measured and is combined indirectly：
1. shield outer surface installation pressure cell directly tests country rock to shield extruding force：
Country rock at measuring point, which is directly measured, using the pressure contact of pressure cell, to the extruding force of shield, pressure cell is fixed on shield
Shield outer surface measuring country rock makes a upper end there are groove and carves threaded cup-shaped base, on-the-spot test to shield extruding force
When cup-shaped base bottom is welded on complete-section tunnel boring machine shield outer surface, for placement force sensor and by pressure
Sensor is fixed on testee complete-section tunnel boring machine shield outer surface, and resistance tunneling boring is played in monitoring and test
Shearing force when rock tunnel(ling) machine moves forward after country rock and pressure sensor contacts, by pressure after the tube chamber welds with base cooling during installation
Sensor is put into this cup-shaped base, pressure sensor cable is drawn from cup-shaped base upper recess, in cable
Around lay flexible steel loop wire bushing pipe and be used to protect cable in order to avoid being squeezed, grinding by the rock in contact when shield move forward
Pressure cell is arranged to array test country rock and shield extruding force is distributed by damage：Vault, two shoulders of left and right and a left side in shield outer surface
Totally five rows, often ten installation pressure cells of row are helped in the right side two, and all pressure cell cables concentrations in shield outer surface are merged into stock introduces
In shield, protective cable wire casing pipe is firmly bonded using AB glue with shield outer surface box hat, and a reality is formed in shield outer surface
When test country rock to the array test network of shield extruding force, the cable access data acquisition in space in shield will be introduced
Instrument, reads data, and the extruding force that i-th of pressure cell of note is measured is Pi；
2. shield inner surface strain testing, inverse country rock is to shield extruding force：
Totally five rows, often ten measuring point installation surface strain transducers of row are helped in shield inner surface vault, two shoulders of left and right and left and right two,
Each measuring point circumferential direction and longitudinal direction are respectively mounted a surface strain sensor, and longitudinal surface strain sensor is indulged for testing shield
To strainCircumferential surface strain sensor is used to test shield hoop strain εθ, measure longitudinal direction and circumferential direction two at the i-th measuring point
The strain in a directionWithCountry rock is calculated at this measuring point to the extruding force P of shieldi'：
Wherein：For the i-th measuring point infinitesimal longitudinal strain,For the i-th measuring point infinitesimal hoop strain；Longitudinally should for the i-th measuring point infinitesimal
Power；For the i-th measuring point infinitesimal circumference stress, Pi' it is the equivalent country rock suffered by the i-th measuring point infinitesimal to shield extruding force；E is shield
Mould is played, μ is shield Poisson's ratio；
Both ends do not constrain complete-section tunnel boring machine shield in the longitudinal direction, if longitudinal stress at each measuring pointAbove formula
(1), (2) are write as：
It solves：
Pressure cell in outer surface is installed simultaneously at vault and longitudinal direction, circumferential surface strain sensor are installed in inner surface,
The extruding force P that pressure cell measures at vault same observation stationiThe equivalent extruding force P obtained with shield inner surface strain inversei' carry out
Compare verification, coefficient between the two is denoted as k：
Meet same ratio at other strain measuring points in shield, shield inner surface strains corresponding shield appearance at the i-th measuring point
Extruding force P suffered by faceiFor：
Pi=kPi' (8)
(2) frictional resistance suffered by shield is calculated by measuring the obtained extruding force regularity of distribution：
Distance is near between measuring point, and the extruding force between adjacent measuring point obeys linear distribution, and two halves shape, stress above and below shield are regarded
It is symmetrical, obtains frictional resistance suffered by the shield generated by country rock extruding force corresponding to each ring monitoring measuring point
In formula：For frictional resistance, j=1,2,3 ... 10 suffered by the corresponding shield of jth ring monitoring measuring point, f is between country rock and shield
Friction coefficient, PiIt is circumferential i-th measuring point country rock to shield extruding force, Pi+1Shield is squeezed for circumferential (i+1) measuring point country rock
Power, chord lengths of the L between the i-th measuring point and (i+1) measuring point, RsFor shield internal diameter, αiIt is corresponding between (i+1) measuring point for the i-th measuring point
Central angle, spacing of the Δ l between longitudinally adjacent two measuring point；
By per ring, the frictional resistance that is calculated of monitoring measuring point is added and adds because what complete-section tunnel boring machine dead weight generated rubbing
Resistance obtains total frictional resistance R suffered by shieldf：
In formula：RfFor frictional resistance total suffered by shield, W conducts oneself with dignity for complete-section tunnel boring machine, and j is the serial number that measuring point is monitored on longitudinal direction；
(3) by card machine condition discrimination criterion, according to frictional resistance and complete-section tunnel boring machine suffered by the shield tested and calculated
The thrust size that propulsion system provides, calculates card machine risk factor and prediction judges card machine, and card machine condition discrimination is：
In formula：FbFor the normal continuous digging excavation thrust of complete-section tunnel boring machine machine, FIIt is promoted for complete-section tunnel boring machine
The normal thrust that system is provided；FrTo overcome the required thrust of frictional resistance suffered by shield, equal to frictional resistance suffered by shield：
Fr=Rf (12)
Differentiate complete-section tunnel boring machine shield by card accordingly；
The risk factor K of complete-section tunnel boring machine card machinesIt is defined as：
In formula：FfFor the required gross thrust of complete-section tunnel boring machine driving Forward；
The risk factor of card machine is calculated, carries out card machine risk analysis, according to the risk factor size of calculating by tunneling boring tunnel digging
Level Four is divided into machine card machine risk：Not card machine, Ks<1；Slight card machine, 1≤Ks<1.2；Serious card machine, 1.2≤Ks<1.5；It is non-
Chang Yanchong card machines, Ks≥1.5。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610361371.1A CN105952465B (en) | 2016-05-26 | 2016-05-26 | A kind of country rock and complete-section tunnel boring machine shield interaction process monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610361371.1A CN105952465B (en) | 2016-05-26 | 2016-05-26 | A kind of country rock and complete-section tunnel boring machine shield interaction process monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105952465A CN105952465A (en) | 2016-09-21 |
| CN105952465B true CN105952465B (en) | 2018-06-15 |
Family
ID=56910936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610361371.1A Active CN105952465B (en) | 2016-05-26 | 2016-05-26 | A kind of country rock and complete-section tunnel boring machine shield interaction process monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105952465B (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437731B (en) * | 2016-10-09 | 2018-06-15 | 中国电建集团成都勘测设计研究院有限公司 | Early warning type double-shielded TBM |
| CN107420105B (en) * | 2017-08-01 | 2018-12-18 | 大连理工大学 | The vibration of full face rock tunnel boring machine key position and strain monitoring method |
| CN107884107B (en) * | 2017-11-29 | 2023-11-21 | 中国电建集团成都勘测设计研究院有限公司 | Full-time-period ground stress testing system under TBM construction condition |
| CN108225929A (en) * | 2017-12-15 | 2018-06-29 | 山东大学 | Block splits rock excavation disturbance and development machine shield load-bearing monitor model assay systems and method |
| CN108267250A (en) * | 2018-04-19 | 2018-07-10 | 中铁工程装备集团有限公司 | A kind of shield hobboing cutter stress on-Line Monitor Device based on fiber-optic grating sensor |
| CN108959763B (en) * | 2018-06-29 | 2020-06-09 | 华中科技大学 | Friction resistance calculation method for deep circular tunnel TBM tunneling |
| CN108918012B (en) * | 2018-07-16 | 2020-07-28 | 中铁十四局集团有限公司 | Method for monitoring disturbance stress of surrounding rock of subway shield tunnel |
| US10823655B2 (en) * | 2018-10-10 | 2020-11-03 | Deere & Company | Method and apparatus to measure strains in adhesives of joints |
| CN109387385B (en) * | 2018-10-24 | 2019-09-03 | 中国科学院武汉岩土力学研究所 | A kind of three-dimensional TBM shield outer surface country rock Load Identification Methods |
| CN109682503A (en) * | 2019-01-11 | 2019-04-26 | 中铁十一局集团第四工程有限公司 | A kind of tunnel double-lining concrete pressure monitoring system and its application method |
| CN109738022A (en) * | 2019-02-18 | 2019-05-10 | 中国科学院武汉岩土力学研究所 | TBM tunneling process country rock and TBM interaction monitoring method and device |
| CN109932111B (en) * | 2019-02-20 | 2021-04-27 | 天津大学 | Optical fiber distributed space three-dimensional force touch sensing method |
| CN110738825A (en) * | 2019-11-01 | 2020-01-31 | 中铁隧道局集团有限公司 | open TBM broken stratum early warning method and system |
| CN111076858A (en) * | 2019-11-29 | 2020-04-28 | 上海建工集团股份有限公司 | Nondestructive measurement method for concrete conveying pressure in conveying pipe |
| CN111636876B (en) * | 2020-04-21 | 2021-09-07 | 中南大学 | Method for detecting stress of key position of shield body of large-diameter shield machine |
| CN111637990B (en) * | 2020-04-21 | 2021-10-01 | 新疆额尔齐斯河流域开发工程建设管理局 | Method for detecting stress of key position of cutter head system of large-diameter shield tunneling machine |
| CN112461665B (en) * | 2020-12-02 | 2022-07-12 | 华北科技学院 | High-precision measurement device and test method for interface pressure distribution of silo test model |
| CN112832772B (en) * | 2020-12-28 | 2022-06-07 | 山东大学 | Shield type TBM tunnel surrounding rock over-excavation sensing and surrounding rock deformation monitoring device |
| CN113008157A (en) * | 2021-04-26 | 2021-06-22 | 黄河勘测规划设计研究院有限公司 | Tunnel boring machine shield inner surface deformation monitoring method |
| CN114692457B (en) * | 2022-03-28 | 2023-07-18 | 中铁二院工程集团有限责任公司 | Judgment method and processing method for tunnel machine-blocking risk of open TBM (tunnel boring machine) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3816987B2 (en) * | 1996-08-08 | 2006-08-30 | 大成建設株式会社 | Tunnel excavation method |
| CN103364218A (en) * | 2013-08-05 | 2013-10-23 | 中国科学院武汉岩土力学研究所 | Miniature TBM (Tunnel Boring Machine) excavation system for tunnel excavation in physical simulation test |
| CN103557013A (en) * | 2013-11-06 | 2014-02-05 | 王静 | Annular steel structure supporting construction method with open type TBM (tunnel boring machine) |
| CN104165058B (en) * | 2014-07-30 | 2016-04-13 | 浙江大学 | TBM tunnels geological environment analogue means |
-
2016
- 2016-05-26 CN CN201610361371.1A patent/CN105952465B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105952465A (en) | 2016-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105952465B (en) | A kind of country rock and complete-section tunnel boring machine shield interaction process monitoring method | |
| CN104849151B (en) | A kind of portable plate being suitable for free detrusion folds ring boxshear apparatus | |
| Entacher et al. | Cutter force measurement on tunnel boring machines–Implementation at Koralm tunnel | |
| CN101922985B (en) | Measurement method for stress change of rocks during TBM tunneling | |
| CN109387385B (en) | A kind of three-dimensional TBM shield outer surface country rock Load Identification Methods | |
| CN101021570A (en) | Non-contact mine ground pressure observing and estimating method | |
| CN104390733A (en) | Determination method for magnitude and direction of crustal stress | |
| CN203310554U (en) | Three-component dual-ring borehole deformeter | |
| CN105735375A (en) | Method and system for monitoring stability of loess tunnel bottom and construction method | |
| CN112857988A (en) | Asymmetric load loading test system and test method for full-scale test of pipe piece | |
| CN102278948B (en) | Compound optical fiber sensing monitoring system and method based on optical fiber compound sensing module | |
| Sun et al. | Dynamic detection and analysis of overburden deformation and failure in a mining face using distributed optical fiber sensing | |
| CN105890837B (en) | A kind of test country rock is to the pressure cell of complete-section tunnel boring machine shield extruding force | |
| CN106932129A (en) | Colliery depth shaft wall safety monitoring assembly and its monitoring method | |
| CN109387151A (en) | Tunnel model displacement and convergent measuring equipment and method in a kind of laboratory test | |
| CN111636876B (en) | Method for detecting stress of key position of shield body of large-diameter shield machine | |
| CN106643630B (en) | It is a kind of monitoring the back production of gob side entry retaining obturation during stability system and method | |
| CN105319123A (en) | Multifunctional model test pile | |
| CN113504121B (en) | Built-in surrounding rock in-situ testing device and method for TBM supporting shoes | |
| CN207689056U (en) | A kind of geostress survey probe and geostress survey system | |
| CN201857953U (en) | Advanced abutment pressure monitoring device on coal face | |
| CN205484212U (en) | Country rock damage time effect test structure | |
| CN203083529U (en) | Brillouin optical sensing type continuous multi-point displacement meter measurement apparatus | |
| CN114216430B (en) | Real-time monitoring method for roller strain of main driving bearing of large-scale heading machine | |
| CN115434694A (en) | Underground coal mine multi-parameter measurement while drilling system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Huang Xing Inventor after: Liu Quansheng Inventor after: Peng Xingxin Inventor after: Zhang Xiaoping Inventor after: Zhang Jianming Inventor after: Zhang Xiaobo Inventor after: Liu He Inventor before: Huang Xing Inventor before: Liu Quansheng Inventor before: Peng Xingxin Inventor before: Zhang Xiaoping Inventor before: Zhang Jianming Inventor before: Zhang Xiaobo Inventor before: Zhao Yifan |
|
| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180509 Address after: 430071 Wuhan Institute of rock and soil mechanics, Hongshan Academy of Sciences, Wuchang, Wuhan, Hubei Applicant after: Wuhan Institute of rock and soil mechanics, Chinese Academy of Sciences Applicant after: Wuhan University Address before: 430071 Wuhan Institute of rock and soil mechanics, Hongshan Academy of Sciences, Wuchang, Wuhan, Hubei Applicant before: Wuhan Institute of rock and soil mechanics, Chinese Academy of Sciences |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant |