CN107060792A - A kind of drilling type experimental rig and method for shield model test - Google Patents
A kind of drilling type experimental rig and method for shield model test Download PDFInfo
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- CN107060792A CN107060792A CN201710419037.1A CN201710419037A CN107060792A CN 107060792 A CN107060792 A CN 107060792A CN 201710419037 A CN201710419037 A CN 201710419037A CN 107060792 A CN107060792 A CN 107060792A
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- pipe
- cutterhead
- drilling
- tunnel
- shield
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to a kind of drilling type experimental rig and method for shield model test, including workbench, tunnel pipe is provided with the workbench, the cutterhead driven by drive mechanism is provided with front side of the tunnel pipe, the confined chamber for storing the dregs after excavating is provided with rear side of the cutterhead, the bottom of the confined chamber is provided with slag absorbing mechanism, the top of confined chamber is provided with the ventilating mechanism that keying is synchronously completed with slag absorbing mechanism, medial surface and the bonding rubber sleeve of tunnel pipe are equipped with the tunnel pipe, the rubber sleeve is provided with simulation slip casting mechanism, the simulation box for inserting soil layer material is additionally provided with front side of the workbench, the both sides of the simulation box are reserved with the hole crept into for cutterhead respectively.The device not only compact conformation, and be conveniently used for excavation simulation and slip casting process, while method is easy.
Description
Technical field
The present invention relates to a kind of drilling type experimental rig and method for shield model test, belong to underground Geotechnical Engineering
Shield model test technical field.
Background technology
With the rapid development of the national economy, the volume of traffic increasingly increases, accelerating urban construction and protecting surrounding enviroment
It is required that under, actively reasonably the exploitation underground space builds subway in many cities.Shield method is as main in subway construction
Construction method has been widely applied, but shield tunneling process is more obvious to the disturbance of soil layer around, while in view of cutterhead
Diameter is more than section of jurisdiction external diameter, and pipe sheet assembling is finished and deviate from after shield tail, a radial clearance will be formed with the soil body, is often caused
Larger stratum settlement, and grouting at the tail of the shield machine can effectively reduce earth's surface deformation and ground movements.
For shield-tunneling construction process research for understanding shield tunnel architectural characteristic itself and its shadow to surrounding enviroment
Sound is significant, wherein more intuitively result can be obtained by carrying out correlative study using research technique.It is limited to construction environment
Influence and measurement means are not enough, and the Shield Tunneling process testing based on scene is relatively difficult to achieve, therefore can pass through model test
Complete the engineering simulation to Shield Tunneling slip casting.
Domestic and foreign scholars have carried out a series of model tests for Shield Tunneling and the relevant issues of slip casting, preferably
Complete the simulation of the slip casting after the Excavation simulation and excavation of shield tunnel.But for Shield Tunneling and note in being fruitful
The synchronously simulating research of slurry is less, it is difficult to while considering disturbance and grouting at the tail of the shield machine of the shield tunneling to soil layer around to stratum deformation
Influence.For this reason, it may be necessary to a kind of drilling type experimental rig and method for shield model test.
The content of the invention
It is an object of the invention to provide a kind of drilling type experimental rig and method for shield model test, not only tie
Structure is compact, and is conveniently used for excavation simulation and slip casting process, while method is easy.
Technical program of the present invention lies in：A kind of drilling type experimental rig for shield model test, including workbench,
It is provided with the workbench on front side of tunnel pipe, the tunnel pipe and is provided with the cutterhead driven by drive mechanism, it is described
The confined chamber for storing the dregs after excavating is provided with rear side of cutterhead, the bottom of the confined chamber is provided with slag absorbing mechanism,
The top of confined chamber is provided with the ventilating mechanism that keying is synchronously completed with slag absorbing mechanism, the tunnel pipe and is equipped with medial surface
The bonding rubber sleeve with tunnel pipe, the rubber sleeve is provided with simulation slip casting mechanism, and the front side of the workbench is also
The simulation box for inserting soil layer material is provided with, the both sides of the simulation box are reserved with the hole crept into for cutterhead respectively
Hole.
Further, the drive mechanism includes the transmission rod that is connected with cutterhead, and the transmission rod passes through tunnel pipe
And rear end is connected with motor.
Further, inner ring and two groups of outer ring blade are provided with the cutterhead, the blade is pressed from both sides with drilling direction formation
Angle, the blade of the outer ring, which gathers, to be arranged.
Further, metal cap shell is equipped with outside the cutterhead, the metal case is connected as entirety with confined chamber.
Further, the slag absorbing mechanism includes the conduit of slagging tap that front end is connected with confined chamber bottom, and described slag tap is led
Pipe, which passes through tunnel, pipe and is provided with slag absorbing device, and the rear end for conduit of slagging tap is connected with the dregs collector being arranged on rear side of workbench
Connect.
Further, the ventilating mechanism includes the airway that front end is connected with confined chamber top, and the ventilation is led
Pipe passes through tunnel and is provided with gas valve on pipe and the end for the pipe that passes through tunnel.
Further, axial direction of the rubber sleeve along tunnel pipe is divided into some sections by narrow to wide from front to back, adjacent
It is closely coupled between two sections；The simulation slip casting mechanism includes the water filling flexible pipe being connected with every section of rubber sleeve, the water filling
Flexible pipe is each passed through tunnel pipe and is connected with hydraulic pump.
Further, the diameter of hole is identical with cutter diameter on the simulation box.
A kind of a kind of drilling type for shield model test of drilling type test method for shield model test is tested
Device, step is as follows：
1）Model casing is completed, the soil layer material similar to the actual soil layer at simulated shield-tunneling construction scene is inserted, and ram
It is real to stand；
2）Assembling cutterhead, confined chamber and tunnel pipe, and connect drive mechanism on the table；
3）Lubricating fluid need to be smeared in rubber sleeve outer surface, the drilling position of cutterhead is adjusted；
4）During excavation simulation, opening drive mechanism makes cutterhead creep into forward, and drilling distance is actual shield duct piece longitudinal ruler every time
It is very little to change gained according to geometric similarity ratio, while opening slag absorbing mechanism, the dregs after excavation is discharged, and opens ventilating mechanism and is tieed up
Hold stable gas pressure in confined chamber；
5）Drive mechanism, slag absorbing mechanism and ventilating mechanism are closed after the completion of single drilling, by tunnel pipe follow-up correspondence drilling length
Degree；
6）When simulating slip casting, liquid is injected into rubber sleeve along water filling flexible pipe using hydraulic pump, passes through the swollen of rubber sleeve
Swollen simulation slip casting effect；
7）Before next step drilling is excavated, partially liq in prexxure of the hydraulic pump, discharge rubber sleeve need to be reduced, to reduce tunnel circle
With the friction of surrounding soil layer when pipe follows up；
8）Circulation step 4）To step 7）, it is fully completed until excavating.
Further, the soil layer material in described model casing is based on the actual soil layer in scene and changes institute by the material likelihood ratio
.
Compared with prior art, the present invention has advantages below：
Model test apparatus accomplishes that drilling will be excavated and grouting at the tail of the shield machine is combined, and the excavation speed of cutterhead is controlled by motor
Degree and process, excavation simulation disturbance, grouting at the tail of the shield machine is simulated by hydraulic pressure size in hydraulic pump control rubber sleeve, well also
The former process of live shield tunneling slip casting.Confined chamber is formed after cutterhead, is easy to the collection and discharge of dregs, realizes and go out automatically
Soil, while the similar soil layer material for not excavating surrounding prevented also from conduit of slagging tap is sucked, the addition of airway makes confined chamber
Interior air pressure more they tends to stabilization.This model test apparatus can be reused, and can carry out multi-state experiment, be a kind of applicability compared with
Good shield tunneling grouting model test device.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the schematic cross-sectional view of the tunnel pipe of the present invention；
Fig. 3 is the schematic diagram of the cutterhead of the present invention；
Fig. 4 is connected thin portion profile with surrounding structure for the rubber sleeve of the present invention；
In figure：1- model casings, 1a- holes, 2- cutterheads, 2a- inner rings blade, 2b- outer rings blade, 3- confined chambers, 4- transmission rods, 5-
Motor, 6- slag tap conduit, 7- dregs collector, 8- slag absorbings device, 9- airways, 10- gas valves, 11- tunnels pipe,
12- rubber sleeves, 13- water fillings flexible pipe, 14- hydraulic pumps, 15- workbench.
Embodiment
For the features described above and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing, make detailed
Carefully it is described as follows, but the present invention is not limited thereto.
Referring to figs. 1 to Fig. 4
Tunnel is provided with a kind of drilling type experimental rig for shield model test, including workbench 15, the workbench
Being provided with to be provided with rear side of the cutterhead 2 driven by drive mechanism, the cutterhead on front side of pipe 11, the tunnel pipe is used for
Need to ensure closed chamber interior region sealing in the confined chamber 3 of dregs after storage excavation, digging process.The bottom of the confined chamber
Slag absorbing mechanism is provided with, the top of confined chamber is provided with the ventilating mechanism that keying is synchronously completed with slag absorbing mechanism, the tunnel circle
Medial surface and the bonding rubber sleeve 12 of tunnel pipe are equipped with pipe, the rubber sleeve is provided with simulation slip casting mechanism,
The simulation box 1 for inserting soil layer material is additionally provided with front side of the workbench, the both sides of the simulation box are reserved respectively
There is the hole 1a crept into for cutterhead, the diameter of described hole is identical with cutter diameter, so as to the drilling of cutterhead.
In the present embodiment, the drive mechanism includes the transmission rod 4 that is connected with cutterhead, and the transmission rod passes through tunnel circle
Manage and rear end is connected with motor 5, so as to provide rotary power for cutterhead.And, by the rotation speed for controlling motor
Spend with propulsive force to simulate the disturbance situation of different shield tunneling speed and digging process to soil layer.
In the present embodiment, inner ring blade 2a and outer ring blade 2b are provided with the cutterhead, the blade of the outer ring gathers
Arrangement, can be more uniformly stressed excavated section, be easy to cutterhead 2 to advance；Each group blade forms an angle with drilling direction shape, real
Existing cutting of the blade to front soil layer.
In the present embodiment, metal cap shell is equipped with outside the cutterhead, the metal case is connected as entirety with confined chamber, with
Ensure that rear side confined chamber 3 will not be driven to rotate when cutterhead 2 is internally rotated.
In the present embodiment, the slag absorbing mechanism includes the conduit 6 of slagging tap that front end is connected with confined chamber bottom, described to slag tap
Conduit, which passes through tunnel, pipe and is provided with slag absorbing device 8, the rear end for conduit of slagging tap and the dregs collector 7 being arranged on rear side of workbench
It is connected.Complete to slag tap conduit opening and closing by slag absorbing device 8 and soil suction is slagged tap work, the dregs after excavating every time is not clogged close
Closed chamber, so as to ensure to excavate progress working properly.
In the present embodiment, the ventilating mechanism includes the airway 9 that front end is connected with confined chamber top, the ventilation
Conduit passes through tunnel and is provided with gas valve 10 on pipe and the end for the pipe that passes through tunnel.Led by gas valve 10 with slagging tap
Pipe 6 synchronously completes pipeline opening and closing, keeps the air pressure inside of confined chamber 3 stable, making to slag tap when the air-breathing of conduit 6 is slagged tap is unlikely to before destruction
The stability of soil layer section is not excavated in side.
In the present embodiment, tunnel pipe 11 is made corresponding to actual shield duct piece according to certain material likelihood ratio, tunnel
The external diameter of road pipe 11 and thickness change gained by geometric similarity ratio, and overall length is excavation length.In the digging process of cutterhead 2, pass through tunnel
The installation of with come in simulating shield duct piece of the road pipe 11 along front tunnel excavation.
In the present embodiment, the slip casting situation after the rubber sleeve pressurization filling outside simulation lining segment.The rubber tube
Set along the axial direction of tunnel pipe from front to back by narrow to wide be divided into some sections, adjacent two sections between it is closely coupled.Each section foremost
Length is by actual shield duct piece longitudinal size by geometric similarity than obtained by conversion, the area of section after being full of is equivalent to cutterhead 2
The difference of the sectional area of excavation area and tunnel pipe 11.
In the present embodiment, the simulation slip casting mechanism includes the water filling flexible pipe being connected with every section of rubber sleeve, the note
Water tube hose is each passed through tunnel pipe and is connected with hydraulic pump.Each rubber sleeve 12 provides hydraulic pressure by hydraulic pump 14 respectively to be made
Its expansion or shrinkage, to simulate slip casting effect, specific pressurization size need to be according to section of jurisdiction during actual shield-tunneling construction and surrounding soil
Obtained by layer slurry pressure similarly transformation.
In the present embodiment, the workbench is used for drilling part and the motor 5 for placing experimental rig to be crept into, can root
Change the height of workbench 15 and position according to specific test requirements document, it is ensured that drilling part and the connection of motor 5, and can be to boring
Enter direction and carry out real-time monitoring.
A kind of a kind of drilling type for shield model test of drilling type test method for shield model test is tested
Device, step is as follows：
1）Model casing is completed, the soil layer material similar to the actual soil layer at simulated shield-tunneling construction scene is inserted, and ram
Real to stand, the soil layer material in described model casing is based on the actual soil layer in scene and changes gained by the material likelihood ratio；
2）Assembling cutterhead, confined chamber and tunnel pipe, and connect drive mechanism on the table；
3）Need to smear lubricating fluid in rubber sleeve outer surface, with reduce with the friction of soil layer storeroom, reduction tunnel pipe 11 to
Soil layer is unstable caused by the tangential force effect of rubber sleeve 12 and surrounding soil layer during being followed up inside tunneling；And adjust
The drilling position of cutterhead；
4）During excavation simulation, motor is opened, controls cutterhead 2 to creep into forward by transmission rod 4, drilling distance is actual every time
Shield duct piece longitudinal size, than conversion gained, while opening slag absorbing device 8, the dregs after excavation is led along slagging tap according to geometric similarity
The dregs collector 7 that pipe 6 is drained into outside model casing 1, and ensure that airway 9 is unimpeded, maintain stable gas pressure in confined chamber 3；
5）Drive mechanism, slag absorbing mechanism and ventilating mechanism are closed after the completion of single drilling, the tunnel for being bonded with rubber sleeve is justified
Pipe follow-up correspondence drilling length；
6）When simulating slip casting, liquid is injected into rubber sleeve along water filling flexible pipe using hydraulic pump, passes through the swollen of rubber sleeve
Swollen simulation slip casting effect；
7）Before next step drilling is excavated, partially liq in prexxure of the hydraulic pump, discharge rubber sleeve need to be reduced, to reduce tunnel circle
With the friction of surrounding soil layer when pipe follows up；
8）Circulation step 4）To step 7）, it is fully completed until excavating.
Presently preferred embodiments of the present invention is the foregoing is only, for the ordinary skill in the art, according to this hair
Bright teaching, designs various forms of drilling type experimental rigs and method for shield model test and does not need creativeness
Work, it is all without departing from the principles and spirit of the present invention impartial to become according to what scope of the present invention patent was done
Change, change, replace and modification, should all belong to the covering scope of the present invention.
Claims (10)
1. a kind of drilling type experimental rig for shield model test, including workbench, it is characterised in that on the workbench
It is provided with to be provided with rear side of the cutterhead driven by drive mechanism, the cutterhead on front side of tunnel pipe, the tunnel pipe and sets
The confined chamber for storing the dregs after excavating is equipped with, the bottom of the confined chamber is provided with slag absorbing mechanism, the top of confined chamber
It is provided with the ventilating mechanism that keying is synchronously completed with slag absorbing mechanism, the tunnel pipe and is equipped with medial surface and tunnel pipe phase
Cohesive rubber sleeve, the rubber sleeve is provided with front side of simulation slip casting mechanism, the workbench and is additionally provided with for filling out
Bury the simulation box of layer material, and the both sides of the simulation box are reserved with the hole crept into for cutterhead respectively.
2. a kind of drilling type experimental rig for shield model test according to claim 1, it is characterised in that described
Drive mechanism includes the transmission rod that is connected with cutterhead, and the transmission rod passes through tunnel pipe and rear end is connected with motor
Connect.
3. a kind of drilling type experimental rig for shield model test according to claim 1 or 2, it is characterised in that
Inner ring and two groups of outer ring blade, the blade and drilling direction formation angle, the blade of the outer ring are provided with the cutterhead
Gather and arrange.
4. a kind of drilling type experimental rig and method for shield model test according to claim 3, its feature exists
In being equipped with metal cap shell outside the cutterhead, the metal case is connected as entirety with confined chamber.
5. a kind of drilling type experimental rig for shield model test according to claim 1,2 or 4, its feature exists
Include the conduit of slagging tap that front end is connected with confined chamber bottom in, the slag absorbing mechanism, the conduit of slagging tap passes through tunnel pipe
And slag absorbing device is provided with, the rear end for conduit of slagging tap is connected with the dregs collector being arranged on rear side of workbench.
6. a kind of drilling type experimental rig for shield model test according to claim 5, it is characterised in that described
Ventilating mechanism includes the airway that is connected with confined chamber top of front end, and the airway, which passes through tunnel, pipe and passes through tunnel
Gas valve is provided with the end of road pipe.
7. a kind of drilling type experimental rig for shield model test according to claim 1,2,4 or 6, its feature exists
In, axial direction of the rubber sleeve along tunnel pipe from front to back by narrow to wide be divided into some sections, adjacent two sections between close phase
Even；The simulation slip casting mechanism includes the water filling flexible pipe being connected with every section of rubber sleeve, and the water filling flexible pipe is each passed through tunnel
Road pipe is simultaneously connected with hydraulic pump.
8. a kind of drilling type experimental rig for shield model test according to claim 1, it is characterised in that described
The diameter of hole is identical with cutter diameter on simulation box.
9. a kind of drilling type test method for shield model test, including be that one kind is used for shield as claimed in claim 7
The drilling type experimental rig of model test, it is characterised in that step is as follows：
1）Model casing is completed, the soil layer material similar to the actual soil layer at simulated shield-tunneling construction scene is inserted, and ram
It is real to stand；
2）Assembling cutterhead, confined chamber and tunnel pipe, and connect drive mechanism on the table；
3）Lubricating fluid need to be smeared in rubber sleeve outer surface, the drilling position of cutterhead is adjusted；
4）During excavation simulation, opening drive mechanism makes cutterhead creep into forward, and drilling distance is actual shield duct piece longitudinal ruler every time
It is very little to change gained according to geometric similarity ratio, while opening slag absorbing mechanism, the dregs after excavation is discharged, and opens ventilating mechanism and is tieed up
Hold stable gas pressure in confined chamber；
5）Drive mechanism, slag absorbing mechanism and ventilating mechanism are closed after the completion of single drilling, by tunnel pipe follow-up correspondence drilling length
Degree；
6）When simulating slip casting, liquid is injected into rubber sleeve along water filling flexible pipe using hydraulic pump, passes through the swollen of rubber sleeve
Swollen simulation slip casting effect；
7）Before next step drilling is excavated, partially liq in prexxure of the hydraulic pump, discharge rubber sleeve need to be reduced, to reduce tunnel circle
With the friction of surrounding soil layer when pipe follows up；
8）Circulation step 4）To step 7）, it is fully completed until excavating.
10. a kind of drilling type test method for shield model test according to claim 9, it is characterised in that institute
Soil layer material in the model casing stated is based on the actual soil layer in scene and changes gained by the material likelihood ratio.
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| CN201710419037.1A CN107060792B (en) | 2017-06-06 | 2017-06-06 | A kind of drilling type experimental rig and method for shield model test |
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|---|---|---|---|
| CN201710419037.1A CN107060792B (en) | 2017-06-06 | 2017-06-06 | A kind of drilling type experimental rig and method for shield model test |
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| CN107060792A true CN107060792A (en) | 2017-08-18 |
| CN107060792B CN107060792B (en) | 2019-03-19 |
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|---|---|---|---|---|
| CN109342097A (en) * | 2018-11-06 | 2019-02-15 | 宁波用躬科技有限公司 | A kind of shield tunnel all-around test stand and its test method |
| CN109973103A (en) * | 2019-03-22 | 2019-07-05 | 东北大学 | A kind of shield simulation test device of adjustable angle |
| CN110346163A (en) * | 2019-07-18 | 2019-10-18 | 重庆大学 | A kind of pusher experimental rig and method for shield model test |
| CN112761653A (en) * | 2021-01-18 | 2021-05-07 | 西南交通大学 | Muddy water-soil pressure double-mode switchable shield tunneling simulation test device |
| CN113482647A (en) * | 2021-08-30 | 2021-10-08 | 中铁隧道局集团有限公司 | Miniature development machine system for test |
| CN115064049A (en) * | 2022-05-17 | 2022-09-16 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Physical model test system and method for simulation of dewatering well construction process |
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| CN109342097A (en) * | 2018-11-06 | 2019-02-15 | 宁波用躬科技有限公司 | A kind of shield tunnel all-around test stand and its test method |
| CN109973103A (en) * | 2019-03-22 | 2019-07-05 | 东北大学 | A kind of shield simulation test device of adjustable angle |
| CN109973103B (en) * | 2019-03-22 | 2020-04-14 | 东北大学 | Shield simulation test device with adjustable angle |
| CN110346163A (en) * | 2019-07-18 | 2019-10-18 | 重庆大学 | A kind of pusher experimental rig and method for shield model test |
| CN112761653A (en) * | 2021-01-18 | 2021-05-07 | 西南交通大学 | Muddy water-soil pressure double-mode switchable shield tunneling simulation test device |
| CN113482647A (en) * | 2021-08-30 | 2021-10-08 | 中铁隧道局集团有限公司 | Miniature development machine system for test |
| CN115064049A (en) * | 2022-05-17 | 2022-09-16 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Physical model test system and method for simulation of dewatering well construction process |
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