CN208239276U - It is a kind of for simulating the experimental rig of karst area Shield Tunneling - Google Patents
It is a kind of for simulating the experimental rig of karst area Shield Tunneling Download PDFInfo
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- CN208239276U CN208239276U CN201820824786.2U CN201820824786U CN208239276U CN 208239276 U CN208239276 U CN 208239276U CN 201820824786 U CN201820824786 U CN 201820824786U CN 208239276 U CN208239276 U CN 208239276U
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- shield tunneling
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Abstract
The utility model discloses a kind of for simulating the experimental rig of karst area Shield Tunneling, including chamber, shield tunneling device, support frame and measurement system；Support frame is connect with chamber by bottom plate, the prefabricated hole on two opposite wall surfaces of chamber；Shield tunneling device includes cutterhead, shield fuselage, fixed motor and outer tube；Support frame includes reaction support, workbench, screw thread steel column.Measurement system includes sedimentation bar, displacement sensor, pressure cell.The utility model solves monitoring hardly possible in Practical Project, measures the incomplete problem of project.Mechanical model for the tunnel excavation established under different operating conditions, comprehensive influence for studying karst area Shield Tunneling to the soil body, surrounding soil deformation mechanism provide more data basis.Since the utility model is to carry out experimental design based on the principle of similitude, obtained test result deforms practical karst area tunnel surrounding soil and the prediction of formation displacement has certain reference significance.
Description
Technical field
The utility model belongs to the underground engineering ground shield technique field of field of civil engineering, and in particular to one kind is used for
Simulate the experimental rig of karst area Shield Tunneling.
Background technique
Karst Problem is all to be difficult to the problem of escaping in global problem and various countries' Metro Construction, many both at home and abroad
More scholars and engineering staff carry out karsts developing area mechanism, karst exploration method, karst construction processing and methods of risk assessment
A large amount of discussion and research.For the research of shield-tunneling construction process, for understanding shield tunnel itself architectural characteristic and its right
Surrounding enviroment influence is of great significance, wherein carrying out correlative study using research technique can get more intuitive result.Limit
It is influenced in construction environment and measurement means is insufficient, the Shield Tunneling process testing based on scene is relatively difficult to achieve, therefore can lead to
Model test completion is crossed to the engineering simulation of karst area Shield Tunneling.
Domestic and foreign scholars have carried out a series of model test for the relevant issues of Shield Tunneling, however are directed to rock
The problem of model test in molten area is less, and most of experimental provision excavates the soil body for transfer solves to be not thorough, and does not examine
Consider earth pressure balance.Shield machine entirety posture caused by the soil body is backbreak is sunk, and the soil body, which is owed to dig, causes relict soil accumulation to cause tunnel
Top uplift of soil, so how to shift the soil body is the critical issue in model test.
Summary of the invention
To solve the above problems existing in the prior art, the utility model provides a kind of for simulating karst area shield tunnel
The experimental rig that road excavates can carry out simulation and the change to the soil body under related operating condition to the solution cavity condition of different location, size
Shape characteristic and mechanical behavior are monitored, and influence to provide sufficient data information for research karst area Shield Tunneling, real
The prediction that now specific shield tunnel construction is influenced.
To achieve the goals above, the technical solution of the utility model is as follows: one kind is for simulating karst area shield tunnel
The experimental rig that road excavates, including chamber, shield tunneling device, support frame and measurement system, support frame as described above and chamber
It is connected by bottom plate；Chamber band bottom, opening, chamber are provided with the soil body, and the surface layer of the soil body is lower than the opening of chamber
Face, solution cavity are placed in the soil body, the prefabricated hole on two opposite wall surfaces of chamber, the periphery peripheral hardware of hole on the outside of two wall surfaces
It is equipped with ring steel pore road, carries out driving and soil stabilization for ensureing that shield tunneling device enters chamber；The shield is opened
Digging device includes cutterhead, outer tube, shield fuselage and motor, and cutterhead is detachable, and the diameter of shield fuselage is less than the diameter of cutterhead, shield
Structure fuselage interior is equipped with spiral steel disc, and outside is nested with outer tube (outer diameter of outer tube and the diameter of cutterhead are identical), and outer tube simulates tunnel
The lining-up in road, motor one end pass through fixed steel loop and are connected with shield fuselage, and the other end passes through fixation steel loop and level jack
Top is connected；Support frame includes that reaction support, workbench and sliding steel are buckled, and reaction support is vertical on workbench, with level
The pedestal of jack is connected, and workbench is equipped with slideway, and slideway is slidably connected with sliding steel button, and fixed steel loop and sliding steel button are solid
Fixed connection；The measurement system includes several sedimentation bars, several groups pressure cell, data collecting instrument and computer, the sedimentation
Bar upper end is connect with displacement sensor, and lower end is fixed in the soil body, and institute's displacement sensors are arranged on soil body surface layer, if described
Dry group pressure cell four direction arranged for interval in upper and lower, left and right on the outside of pre- tunneling；Institute's displacement sensors and pressure cell
It is connect respectively by data line with data collecting instrument, data collecting instrument is connect with computer.
The center of spiral steel disc is equipped with rotary shaft, and rotary shaft one end is connected to the motor, and the other end is connected with cutter head center.
The axial length of spiral steel disc is identical as the length of shield fuselage.
The height of workbench is adjusted by screw thread steel column.Screw thread steel column is connect with bottom plate.
It is preferred that cutterhead is equipped with eight fan knife faces.
The soil body is prepared according to the likelihood ratio, and native embedded set paraffin is molten to prefabricated soil cave or the prefabricated rich water of embedding ice cube
Hole.Solution cavity position size can be controlled freely.
Reaction support welds on the table.
Optimization test case is visualization tempered glass case, is prefabricated with scale mark line on four wall glass, convenient for the observation soil body
Displacement sedimentation.To prevent experimental box body from deforming, four wall of experimental box is externally provided with steel plate framework, is protected.Ring steel pore road is set
In on steel plate framework.Experimental box is additionally provided with steel pipe support, and experimental box body is fixed on bottom plate by steel pipe support, prevents from testing
Case inclination.
It is preferred that the outer tube is pvc pipe or steel pipe.
One group of pressure cell is arranged preferably by 10cm, be can according to need and is carried out horizontal measurement or vertical measurement.It is described heavy
It drops bar and arranges one along tunnel lateral direction interval 10cm.Further, 4 pressure cells are equipped with for every group.
It is a kind of for simulating the application method of the experimental rig of karst area Shield Tunneling, include the following steps:
A. then the soil body needed for configuration is good is arranged measuring equipment in place by experimental design requirement；
When B. being tunneled, outer tube is nested in shield fuselage outer side first, adjustment height makes at cutterhead and hole and same
One position powers on and starts motor, and motor band movable knife disc and spiral steel disc rotate, and starts the horizontal propulsive force of jack offer,
Shield tunneling device is set to enter chamber by steel pipe duct；
C. after shield machine runs through cabinet, stop drilling, close motor, remove cutterhead, level jack is withdrawn, by shield
Fuselage extraction, the soil body are discharged with spiral steel disc, outer tube are stayed in chamber, stayed outer tube is the shield duct piece of simulation；
D. stratum settlement and ground settlement are extrapolated by monitoring sedimentation bar, is measured around the soil body and is pressed by pressure cell
The variation of power, the changing rule of soil pressure when recording different situations.
The utility model applies also for subway engineering.
Compared with prior art, the utility model has the following beneficial effects:
1, soil pressure is measured by model test and is displaced the case where settlement prediction Practical Project is likely to occur, this is practical
It is novel can deformation characteristic to surrounding soil during the shield tunneling of karst area and mechanical characteristics comprehensively monitored, solve
Monitoring in Practical Project of having determined is difficult, measures the incomplete problem of project.
2, the utility model can by changing under different solution cavity properties, tunnel surrounding soil deformation characteristic and mechanical behavior
Research studies karst area Shield Tunneling to the soil body for the mechanical model for the tunnel excavation established under different operating conditions comprehensively
Influence, surrounding soil deformation mechanism provide more data basis.
3, the utility model is to carry out experimental design based on the principle of similitude, therefore obtained test result is to practical karst region
The deformation of area tunnel surrounding soil and the prediction of formation displacement have certain reference significance.
4, cutterhead, fuselage, motor, jack integrated are simply and effectively solved the soil body in tunneling process by the present apparatus
The problem of transfer, the soil that cutterhead is excavated are transported to fuselage, transport soil body realization synchronous with drilling excavation.
5, the utility model is the experimental provision of complete set, is also separately needed while stent molding box compared to other models
Fixed counter force wall, the chamber of this experimental provision, support frame are linked together by bottom steel plate, the reaction support on support frame
Keep the traveling of shield model more convenient.
6, the generally visual tempered glass of the utility model chamber, to prevent box deformation, additional steel plates frame protection,
And steel plate framework is equipped with steel pipe duct, plays certain orientation and supporting role.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is shield tunneling device outer tube schematic diagram.
Fig. 3 is the chamber structural front view of the utility model.
Fig. 4 is chamber the structure left view of the utility model.
Fig. 5 is the shield tunneling device and bracket connection schematic diagram of the utility model.
Fig. 6 connects cross-section diagram with workbench for shield tunneling device.
Fig. 7 is the layout diagram of the measurement system of the utility model.
In figure: 1, chamber, 2, shield tunneling device, 3, support frame, 4, bottom plate, 5, chamber steel plate framework, 6, steel pipe
Duct, 7, visual armorplate glass, 8, steel pipe support, 9, cutterhead, 10, shield fuselage, 11, spiral steel disc, 12, fixed steel loop,
13, motor, 14, level jack, 15, reaction support, 16, sliding steel button, 17, workbench, 18, fixture nut, 19, casing,
20, bar, 21, sedimentation bar connection frame, 22, pressure cell, 23, solution cavity, 24, outer tube, 25, screw thread steel column are settled.
Specific embodiment
The characteristics of the utility model, is further illustrated in the following with reference to the drawings and specific embodiments.
As shown in figs. 1-7, a kind of for simulating the experimental rig of karst area Shield Tunneling, including chamber 1, shield
Structure excavating device 2, support frame 3 and measurement system, support frame as described above 3 are connect with chamber 1 by bottom plate 4；1 band of chamber
Bottom, opening, chamber 1 are provided with the soil body, and the surface layer of the soil body is lower than the opening face of chamber, and solution cavity 23 is placed in the soil body, is trying
Prefabricated hole on two opposite wall surfaces of tryoff 1 is provided with ring steel pore road 6 outside the periphery of hole on the outside of two wall surfaces, uses
Driving and soil stabilization are carried out into chamber 1 in guarantee shield tunneling device 2；The shield tunneling device 2 include cutterhead 9,
Outer tube 24, shield fuselage 10 and motor 13, cutterhead 9 is detachable, and the diameter of shield fuselage 10 is less than the diameter of cutterhead 9, shield machine
Spiral steel disc 11 is equipped with inside body 10, outside is nested with outer tube 24, and outer tube 24 simulates the lining-up in tunnel, and 13 one end of motor passes through solid
Determine steel loop 12 to be connected with shield fuselage 10, the other end passes through fixed steel loop 12 and is connected with the top of level jack 14；Support frame
3 include reaction support 15, workbench 17 and sliding steel button 16, and reaction support 15 is vertical on workbench 17, very heavy with level
The pedestal on top 14 is connected, and workbench 17 is equipped with slideway, and slideway is slidably connected with sliding steel button 16, fixed steel loop 12 and sliding steel
Button 16 is fixedly connected；The measurement system includes several sedimentation bars 20, several groups pressure cell, data collecting instrument and computer,
20 upper end of sedimentation bar is connect with displacement sensor, and lower end is fixed in the soil body, and institute's displacement sensors are arranged in soil body table
On layer, several groups pressure cell four direction arranged for interval in upper and lower, left and right on the outside of pre- tunneling；The displacement sensing
Device and pressure cell 22 are connect by data line with data collecting instrument respectively, and data collecting instrument is connect with computer.The cutterhead 9 is set
There are eight fan knife faces.Chamber 1 is visualization tempered glass case, is made of visual armorplate glass, is prefabricated with quarter on four wall glass
Scale designation line.1 four wall of experimental box is externally provided with steel plate framework, keeps stablizing.Ring steel pore road is set on steel plate framework.Experimental box
It is additionally provided with steel pipe support, experimental box body is fixed on bottom plate by steel pipe support.The outer tube 24 is PVC pipe or steel pipe.Institute
It states interval one group of pressure cell of 10cm arrangement (carrying out horizontal measurement or vertical measurement as needed), pressure cell 22 there are four every group,
The sedimentation bar 20 arranges one along tunnel lateral direction interval 10cm.The height of workbench 17 passes through screw thread steel column 25 and fixture nut
18 are adjusted.Smooth casing 19 is cased with outside the sedimentation bar 20 and constitutes displacement measuring means, can extrapolate stratum settlement and earth's surface is heavy
Drop, smooth casing 19 are pvc pipe or copper pipe.The center of spiral steel disc 11 is equipped with rotary shaft, rotary shaft one end and 13 phase of motor
Even, the other end is connected with 9 center of cutterhead.The axial length of spiral steel disc 11 is identical as the length of shield fuselage 10.
The Karst Geological Landscape soil body is designed by the likelihood ratio:
Cl、Cw、Cε、Cσ、CE、Cμ、Cρ、CpRespectively represent geometry, displacement, strain, stress, elasticity modulus, Poisson's ratio, severe,
Boundary stress affinity constant.
(1) geometric similarity ratio: Cl=L, the bulk density likelihood ratio: Cγ=1；
(2) Poisson's ratio, angle of friction, the strain likelihood ratio: Cμ=Cφ=Cε=1；
(3) the elasticity modulus likelihood ratio: CE=L.
Solution cavity 23 can simulate rich water solution cavity by embedding ice cube: also by embedding paraffin, resistance wire is reserved in paraffin,
And it is embedded to conduit, heating paraffin is guided after the completion of soil body arrangement and is flowed out, anhydrous solution cavity is simulated with this.
It is a kind of for simulating the application method of the experimental rig of karst area Shield Tunneling, include the following steps:
A. then the soil body needed for configuration is good is arranged measuring equipment in place by experimental design requirement.
When B. being tunneled, motor 13 is opened, band movable knife disc 9 and spiral steel disc 11 rotate, start level jack 14 and mention
Supply water flat propulsive force, and so that shield tunneling device 2 is slid through steel pipe duct 6 on slideway, (cutterhead 9 is inserted in steel into chamber 1
The diameter in pore road 6, steel pipe duct 6 is bigger than shield fuselage diameter, facilitates shield driving and can be carried out a degree of adjustment, steel
Pore road 6 plays certain supporting role, prevents 2 deflection of shield tunneling device), cutterhead 9 rotates required power and is mentioned by motor 13
For motor 13 need to require production according to the revolving speed of shield cutter in normal reality construction.When the length of level jack 14 is inadequate
When can add cushion block.Chamber 1 is linked together by bottom plate 4 with support frame 3, and support frame 3 welds the support of reaction support 15 thousand
Jin top 14；
C. after shield fuselage 10 runs through cabinet, stop drilling, close motor 13, cutterhead 9 is removed on front side of chamber 1,
Level jack 14 is withdrawn, shield fuselage 10 is extracted out from chamber 1, the soil body is discharged with spiral steel disc 11, and outer tube 24 is stayed
In in chamber, to simulate shield duct piece, i.e. shield tunnel.
D. stratum settlement and ground settlement are extrapolated by monitoring sedimentation bar, is measured around the soil body and is pressed by pressure cell
The variation of power, the changing rule of soil pressure when summarizing different situations.
Claims (9)
1. a kind of for simulating the experimental rig of karst area Shield Tunneling, it is characterised in that: including chamber (1), shield
Structure excavating device (2), support frame (3) and measurement system, support frame as described above (3) are connect with chamber (1) by bottom plate (4)；Institute
Chamber (1) band bottom, opening are stated, chamber (1) is provided with the soil body, and the surface layer of the soil body is lower than the opening face of chamber, solution cavity
(23) it is placed in the soil body, the prefabricated hole on two opposite wall surfaces of chamber (1), the periphery peripheral hardware of hole on the outside of two wall surfaces
It is equipped with ring steel pore road (6), carries out driving and soil stabilization for ensureing that shield tunneling device (2) enter chamber (1)；Institute
Stating shield tunneling device (2) includes cutterhead (9), outer tube (24), shield fuselage (10) and motor (13), cutterhead (9) detachably, shield
The diameter of structure fuselage (10) is less than the diameter of cutterhead (9), is equipped with spiral steel disc (11) inside shield fuselage (10), outside is nested with
Outer tube (24), outer tube (24) simulate the lining-up in tunnel, and motor (13) one end passes through fixed steel loop (12) and shield fuselage (10) phase
Even, the other end passes through fixed steel loop (12) and is connected with the top of level jack (14)；Support frame (3) includes reaction support
(15), workbench (17) and sliding steel button (16), reaction support (15) is vertical on workbench (17), with level jack
(14) pedestal is connected, and workbench (17) is equipped with slideway, and slideway and sliding steel button (16) are slidably connected, fixed steel loop (12) and
Sliding steel button (16) is fixedly connected；The measurement system includes several sedimentation bars (20), several groups pressure cells, data collecting instrument
And computer, sedimentation bar (20) upper end are connect with displacement sensor, lower end is fixed in the soil body, institute's displacement sensors cloth
It sets on soil body surface layer, several groups pressure cell four direction arranged for interval in upper and lower, left and right on the outside of pre- tunneling；Institute
Displacement sensors and pressure cell (22) are connect by data line with data collecting instrument respectively, and data collecting instrument and computer connect
It connects.
2. as described in claim 1 a kind of for simulating the experimental rig of karst area Shield Tunneling, it is characterised in that:
Cutterhead (9) is equipped with eight fan knife faces.
3. as described in claim 1 a kind of for simulating the experimental rig of karst area Shield Tunneling, it is characterised in that:
The solution cavity (23) is prefabricated by paraffin or ice cube.
4. as described in claim 1 a kind of for simulating the experimental rig of karst area Shield Tunneling, it is characterised in that:
Chamber (1) is visual tempered glass case, is prefabricated with scale mark line on four wall glass.
5. as described in claim 1 a kind of for simulating the experimental rig of karst area Shield Tunneling, it is characterised in that:
The outer tube (24) is pvc pipe or steel pipe.
6. as described in claim 1 a kind of for simulating the experimental rig of karst area Shield Tunneling, it is characterised in that:
It is spaced 10cm and arranges one group of pressure cell, the sedimentation bar (20) arranges one along tunnel lateral direction interval 10cm.
7. as described in claim 1 a kind of for simulating the experimental rig of karst area Shield Tunneling, it is characterised in that:
The height of workbench (17) is adjusted by screw thread steel column (25).
8. as described in claim 1 a kind of for simulating the experimental rig of karst area Shield Tunneling, it is characterised in that:
The center of spiral steel disc (11) is equipped with rotary shaft, and rotary shaft one end is connected with motor (13), the other end and cutterhead (9) center phase
Even.
9. as described in claim 1 a kind of for simulating the experimental rig of karst area Shield Tunneling, it is characterised in that:
The axial length of spiral steel disc (11) is identical as the length of shield fuselage (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820824786.2U CN208239276U (en) | 2018-05-30 | 2018-05-30 | It is a kind of for simulating the experimental rig of karst area Shield Tunneling |
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| CN201820824786.2U CN208239276U (en) | 2018-05-30 | 2018-05-30 | It is a kind of for simulating the experimental rig of karst area Shield Tunneling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489894A (en) * | 2018-05-30 | 2018-09-04 | 大连交通大学 | A kind of experimental rig and method for simulating karst area Shield Tunneling |
| CN109883840A (en) * | 2019-03-29 | 2019-06-14 | 浙江大学 | Underground utilities deformation test system caused by construction is worn under a kind of two-wire shield tunnel |
| CN110261577A (en) * | 2019-06-10 | 2019-09-20 | 东北大学 | A kind of rectangular top pipe model test apparatus and application method |
| CN114184401A (en) * | 2021-11-09 | 2022-03-15 | 中铁第一勘察设计院集团有限公司 | Similar model test system for earth pressure balance type shield underpass composite foundation |
-
2018
- 2018-05-30 CN CN201820824786.2U patent/CN208239276U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489894A (en) * | 2018-05-30 | 2018-09-04 | 大连交通大学 | A kind of experimental rig and method for simulating karst area Shield Tunneling |
| CN109883840A (en) * | 2019-03-29 | 2019-06-14 | 浙江大学 | Underground utilities deformation test system caused by construction is worn under a kind of two-wire shield tunnel |
| CN110261577A (en) * | 2019-06-10 | 2019-09-20 | 东北大学 | A kind of rectangular top pipe model test apparatus and application method |
| CN114184401A (en) * | 2021-11-09 | 2022-03-15 | 中铁第一勘察设计院集团有限公司 | Similar model test system for earth pressure balance type shield underpass composite foundation |
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