CN106931940A - The simulation laboratory test device of influence and grouting Controlling research of the piping to tunnel - Google Patents
The simulation laboratory test device of influence and grouting Controlling research of the piping to tunnel Download PDFInfo
- Publication number
- CN106931940A CN106931940A CN201710202987.9A CN201710202987A CN106931940A CN 106931940 A CN106931940 A CN 106931940A CN 201710202987 A CN201710202987 A CN 201710202987A CN 106931940 A CN106931940 A CN 106931940A
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- Prior art keywords
- tunnel
- piping
- grouting
- analogue means
- model
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
Abstract
The simulation laboratory test device of influence and grouting Controlling research the present invention relates to a kind of piping to tunnel, is made up of model casing, tunnel-liner model, piping analogue means, grouting analogue means, multigroup strain gauge, displacement meter support and multiple displacement meters.Tunnel-liner model is the hollow aluminum pipe of segmentation, piping analogue means is constituted by filling out sand in plastic sheeting, by the generation for injecting the aqueous solution of certain volume to simulate piping phenomenon of osmosis, grouting analogue means includes and is constituted and be arranged in the two ends of piping analogue means by Grouting Pipe and grouting device, wherein tunnel outer wall posts multigroup strain gauge, to realize the strain measurement to tunnel；Displacement meter is fixed on displacement meter support, it is possible to achieve the measurement to the tunnel model top soil body and tunnel subsidence.Influence and the research of grouting improvement that the present invention can easily and effectively for Piping phenomenon to tunnel, for formulating safety for tunnel engineering crossing technology standard and there is important reference value for the improvement of Piping phenomenon.
Description
Technical field
The present invention relates to the tunnels mimic experimental rig in a kind of Urban Underground Space Excavation and underground structrue engineering, tool
Body is related to the simulation laboratory test device of influence and grouting Controlling research of a kind of piping to tunnel.
Background technology
With the further development of Chinese Urbanization, Urban Underground track traffic is used as the most conveniently urban transportation
System is also developed rapidly, and increasing river-crossing tunnel is built.In the middle of the process of constructing tunnel, because of supporting construction
There is problem in joint treatment or precipitation is improper so as to the seepage that causes, piping accident often occur.Piping is in constructing tunnel
Central shown problem is very serious, and all causes very serious loss to many engineerings.If accident can not
Reason is clearly analyzed, and takes effective treatment measures, not only it cannot be guaranteed that the safety of constructing tunnel, serious also results in
Tunnel is scrapped, and jeopardizes the safety of surrounding enviroment, results in greater loss.And in the polytechnic selection for the treatment of much to piping
On, it is an effective and feasible method that grouting is administered.Therefore, the effect that influence and grouting of the piping to tunnel are administered how is estimated
It is a key problem in constructing tunnel engineering.
Correlation scholar is mainly theoretical analysis, stochastic model, numerical simulation for influence of the piping to tunnel both at home and abroad
Method and field monitoring method.Theoretical analysis method mostlys come from engineering experience, the empirical value obtained by statistical method, it is impossible to from
The origin cause of formation of piping is analyzed in mechanism；The stochastic model also simply macroscopical a certain factor and process that describe piping generation, and
The mechanism of generation can not comprehensively be explained；The method of numerical simulation is confined in the range of finite element modelling seepage flow, by seepage flow with
Soil is isolated and come, it is impossible to consider the interaction of the soil body and seepage flow；The method of field monitoring be subject to dimensional effect, boundary condition and
The influence of soil condition so that monitoring result can not accurate response actual condition.
The content of the invention
Present invention aim at above-mentioned the deficiencies in the prior art, propose that influence and grouting improvement of a kind of piping to tunnel are ground
The simulation laboratory test device studied carefully, realizes Piping phenomenon to tunnel subsidence, and deformation, the research of stress, and observation grouting is administered
Effect.
The technical solution adopted for the present invention to solve the technical problems is：Influence and grouting of a kind of piping to tunnel are administered
The simulation laboratory test device of research, including model casing, tunnel-liner model, piping analogue means, grouting analogue means, multigroup
Strain gauge, multiple LVDT displacement meters, the rectangle case that the model casing is made up of aluminum alloy materials are divided into upper and lower two parts,
Its top surface is set to opening；The tunnel-liner model 2 is aluminum alloy hollow pipe, and longitudinal divisionses are positioned over model casing top half
In sandy soils；The piping analogue means is the piping film that cartridge type plastic sheeting long is constituted, the U-shaped shape of piping film, and along longitudinal direction
It is placed on model casing, Under-cross tunnel lining model, two ends are placed in earth's surface and vertical with earth's surface；The grouting analogue means is in piping
The cartridge type plastic sheeting two ends long of analogue means set one group of grouting tubule, and the fluid injection that one end installation is provided with fluid injection magnetic valve is led
Pipe, installs the sand discharge conduit for being provided with sand discharge liquid electromagnetic valve in other end horizontal direction；Multiple LVDT displacement meters pass through displacement respectively
Meter support is fixed at the haunch of soil body surface and tunnel-liner model；Multiple strain gauges be respectively symmetrically ground be arranged in tunnel mould
The vault of type and arch bottom.
Sand is filled up in advance in the piping film of the piping analogue means, the generation of Piping phenomenon is simulated by water filling,
And by controlling the volume and speed of water filling, the generation of different degrees of Piping phenomenon can be simulated.
Injection slurry in the grouting analogue means is polyurethane solutions.
It is used to control the magnetic valve of slip casting to be used for balancing plastic foil external and internal pressure in the grouting analogue means, to ensure
Fluid pressure is equal with extraneous soil pressure in film.
The grouting analogue means can the simulated grouting project situation administered, by controlling the speed of slip casting, slurry is matched somebody with somebody
Composition and division in a proportion, grouting volume, so as to realize the response in tunnel and the soil body that the different grouting of comparative observation are administered under operating mode, is more had
The grouting administering method of effect.
The beneficial effects of the invention are as follows：
The present invention compared with prior art, with following remarkable advantage：1st, this experiment test device can be made by hand, in phase
Popularity is good in closing scientific research, and experimental test scheme has stronger autgmentability, can be further applicable to city shield tunnel and apply
There is the phenomenons such as piping infiltration in work in tunnel in itself deformation effect research；2nd, the piping tunnels mimic device of this experiment can be with
Piping phenomenon is preferably simulated to tunnel in itself and using the stratum settlement after grouting treatment, it is possible to more accurately measure existing
Tunnel deformation influence；3rd, by controlling sand volumes size and flowing velocity in piping analogue means in this experiment, can be with
The displacement deformation influence in tunnel under different Piping phenomenons is realized, so as to obtain a series of experimental data under different operating modes；4th, originally
Can be existing to piping to realize different grouting situations by the slurries ratio of controlled grouting, filling speed, grouting position in experiment
The regulation effect of elephant；5th, this experiment is first corrected before experiment to tunnel model whole body strain gauge, by curved up and down to tunnel
The correction of square strain gauge and axle power strain gauge, tunnel moment of flexure and axle power everywhere when can go out model test with reverse, more comprehensively
Reaction tunnel institute is affected.6th, the experimental study that Piping phenomenon influences on tunnel is carried out using this set simulating test device, can
For Tunnel Engineering site operation provides good consulting and suggestion, certain theoretical ginseng is provided for formulating safety for tunnel engineering
Examine.
Brief description of the drawings
Fig. 1 is simulating test device schematic diagram in the model casing in embodiment of the invention；
Fig. 2 is piping and grouting simulation schematic device of the present invention in embodiment；
Fig. 3 is foil gauge position view on the tunnel in embodiment of the invention；
Fig. 4 is displacement meter arrangement schematic diagram of the present invention in embodiment.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in further detail by a preferred embodiment.
First, 2, one, the tunnel-liner model of a model casing 1, piping analogue means, a grouting simulation are made
Device.
Fig. 1 is simulating test device schematic diagram in the model casing in embodiment of the invention, as shown in figure 1, outside model casing 1
Shape is in cuboid, and interior space dimension is 800 mm × 500 mm × 500 mm（Length × width × height）, it is 15 mm by 5 thickness
Aluminium alloy plate splicing composition.Tunnel-liner model 2 is four sections of hollow aluminium alloy pipes 3, and external diameter is 80 mm, and internal diameter is 70 mm,
Wall thickness is 5 mm, and axial segmentation length is 100 mm.Lining model section external diameter 100 mm, the mm of internal diameter 70.
Fig. 2 is piping analogue means and grouting simulation schematic device of the present invention in embodiment.As shown in Fig. 2 pipe
Analogue means is gushed, it is U-shaped along placed longitudinally, Under-cross tunnel inside to fill out sand, two ends are placed in earth's surface and vertical with earth's surface；
The piping film 5 of piping analogue means for a diameter of 8 mm cartridge type plastic sheeting long, by the two ends of piping film 5 be placed in earth's surface and
It is vertical with earth's surface, arrange 1 perfusing hole, 6,1 liquid receiving mouth 7.Grouting analogue means is thin in the cartridge type plastics long of piping analogue means
Film two ends, set 1 group of grouting tubule, and the injection catheter 8 for being provided with fluid injection magnetic valve is installed in one end, pacifies in other end horizontal direction
It is equiped with the sand discharge conduit 9 of sand discharge liquid electromagnetic valve.Wherein note, draining solenoid valve are universal models, and injection catheter and discharge opeing are led
Pipe external diameter is 5 mm, and wall thickness is 1 mm；Note, discharging tube external diameter are 10 mm, and wall thickness is 2 mm.
Fig. 3 show foil gauge location arrangements figure.Model body outer wall 16 foil gauges of stickup, wherein foil gauge 37,38,
39,40,41,42,43,44 are attached to tunnel arch bottom, and foil gauge 45,46,47,48,49,50,51,52 is attached at tunnel vault,
Homonymy foil gauge is spaced 50mm, wherein foil gauge 37, and 44,45,52 respectively apart from tunnel edge 25mm.
Start to sand is inserted in model casing, when soil thickness is filled to 140mm, that is, complete subbase soil, be put into pipe
Gush model 5 so that piping model least significant end center line overlaps with model casing axis, and make piping model 5 vertical with soil layer holding,
Ensure the leakage of piping two-port in native table and vertical with earth's surface.
Continue to banket up to thickness up to 200mm, that is, complete tunnel subjacent bed soil, tunnel-liner model 2 is put into sand table
Layer.So that tunnel model center line overlaps with model casing axis.
Continue to banket until thickness reaches 350mm, that is, completion of banketing.Now edpth of tunnel 40mm, piping device depth is
200mm.Whole LVDT displacement meters are fixed on tunnel haunch and soil body ground surface by displacement meter support, and make each LVDT
Move meter to keep straight up, horizontal direction is fixed, and vertical direction can be adjusted.
Fig. 4 is displacement meter support schematic diagram of the present invention in embodiment.As shown in figure 4, displacement meter 11,14,17,20,
23,26,29,32,35, soil body ground surface is fixed on, displacement meter 10,13,16,19,22,25,28,31,34 is fixed on Tunnel Right
At the haunch of side, displacement meter 12,15,18,21,24,27,30,33,36 is fixed at the haunch of tunnel left side, whole displacement meter upper ends
It is fixed on displacement meter support 4.Each displacement meter interval 40mm is evenly arranged at soil body ground surface and haunch, both end of which displacement
Meter 22,23,24,34,35,36 is apart from tunnel face 40mm apart from case side 90mm.LVDT displacement meters end is bonded with adhesive plaster respectively
In the grittiness soil body and tunnel-liner outer surface.In the present embodiment, displacement meter is used for tunnel-liner outer surface and soil body ground surface
Longitudinal Settlement measurement, it specifically measures numerical value and can be obtained by external displacement data Acquisition Instrument.
During experiment, first by provisions for grouting 6 to injecting a small amount of water in piping device so that Piping phenomenon occurs.Period
Observed and recorded each meter reading.（Can be by controlling the volume of injected water volume, speed controls different degrees of Piping phenomenon
Occur）；Then, the injection slurry of grouting device 6 is begun through, husky liquid is reclaimed by liquid receiving device 7, period observed and recorded each instrument
Meter reading, and reading when occurring with piping is analyzed.Furthermore it is possible to the speed of slip casting is controlled, the match ratio of slurry,
Grouting volume, so as to realize the tunnel under the different grouting operating modes of comparative observation.The dependent variable of soil body sedimentation value and tunnel, to
Obtain more efficiently grouting administering method.
Embodiments of the present invention are illustrated above, but the present invention is not limited thereto, can also without departing from
Suitably changed in the range of main points of the invention.
The simulation laboratory test device of influence and grouting Controlling research of the above embodiment of the present invention by piping to tunnel,
Can obtain the influence of tunnel subsidence deformation under different Piping phenomenons, and the strain value in tunnel, longitudinal direction are heavy after grouting is administered
The technique effect of depreciation and soil body ground surface Longitudinal Settlement value.
Claims (5)
1. a kind of simulation laboratory test device of influence and grouting Controlling research of piping to tunnel, including model casing（1）, tunnel
Lining model（2）, piping analogue means, grouting analogue means, multigroup strain gauge, multiple LVDT displacement meters, it is characterised in that：Institute
State model casing（1）The rectangle case being made up of aluminum alloy materials, is divided into upper and lower two parts, and its top surface is set to opening；The tunnel
Road lining model（2）It is aluminum alloy hollow pipe, longitudinal divisionses are positioned in the sandy soils of model casing top half；The piping mould
It is the piping film that cartridge type plastic sheeting long is constituted to intend device（5）, piping film（5）U-shaped shape, and along placed longitudinally in model casing,
Under-cross tunnel lining model（2）, two ends are placed in earth's surface and vertical with earth's surface；The grouting analogue means is in piping analogue means
Cartridge type plastic sheeting two ends long set one group of grouting tubule, and the injection catheter for being provided with fluid injection magnetic valve is installed in one end（8）, the other end
The sand discharge conduit for being provided with sand discharge liquid electromagnetic valve is installed in horizontal direction（9）；Multiple LVDT displacement meters pass through displacement meter support respectively
It is fixed at the haunch of soil body surface and tunnel-liner model；Multiple strain gauges are respectively symmetrically the arch for being arranged in tunnel model on ground
Top and arch bottom.
2. the simulation laboratory test device of influence of the piping according to claim 1 to tunnel and grouting Controlling research, its
It is characterised by：The piping film of the piping analogue means（5）It is interior to fill up sand in advance, the hair of Piping phenomenon is simulated by water filling
It is raw, and by controlling the volume and speed of water filling, the generation of different degrees of Piping phenomenon can be simulated.
3. the simulation laboratory test device of influence of the piping according to claim 1 to tunnel and grouting Controlling research, its
It is characterised by：Injection slurry in the grouting analogue means is polyurethane solutions.
4. the simulation laboratory test device of influence of the piping according to claim 1 to tunnel and grouting Controlling research, its
It is characterised by：It is used to control the magnetic valve of slip casting to be used for balancing plastic foil external and internal pressure in the grouting analogue means, to protect
Fluid pressure is equal with extraneous soil pressure in card film.
5. influence according to any described piping of claim 1-4 to tunnel and the simulation laboratory test dress of grouting Controlling research
Put, it is characterised in that：It is described grouting analogue means can simulated grouting administer project situation, by controlling the speed of slip casting, slurry
The match ratio of body, grouting volume, so as to realize the response in tunnel and the soil body that the different grouting of comparative observation are administered under operating mode, is obtained
More efficiently grouting administering method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710202987.9A CN106931940B (en) | 2017-03-30 | 2017-03-30 | The simulation laboratory test device of influence and be in the milk Controlling research of the piping to tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710202987.9A CN106931940B (en) | 2017-03-30 | 2017-03-30 | The simulation laboratory test device of influence and be in the milk Controlling research of the piping to tunnel |
Publications (2)
| Publication Number | Publication Date |
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| CN106931940A true CN106931940A (en) | 2017-07-07 |
| CN106931940B CN106931940B (en) | 2019-03-05 |
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| CN201710202987.9A Active CN106931940B (en) | 2017-03-30 | 2017-03-30 | The simulation laboratory test device of influence and be in the milk Controlling research of the piping to tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954676A (en) * | 2019-12-03 | 2020-04-03 | 同济大学 | Visual test device for simulating shield tunneling existing tunnel construction |
| CN116067845A (en) * | 2022-11-23 | 2023-05-05 | 山东大学 | Test device and method for monitoring disturbance of stratum grouting to tunnel structure |
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| CN102071943A (en) * | 2010-12-13 | 2011-05-25 | 上海大学 | Centrifugal experimental simulation testing device for surface subsidence induced by city shield tunnel construction |
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| CN102071943A (en) * | 2010-12-13 | 2011-05-25 | 上海大学 | Centrifugal experimental simulation testing device for surface subsidence induced by city shield tunnel construction |
| CN103115788A (en) * | 2012-11-20 | 2013-05-22 | 上海理工大学 | Indoor model experience device with existing tunnel affected by double subway construction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954676A (en) * | 2019-12-03 | 2020-04-03 | 同济大学 | Visual test device for simulating shield tunneling existing tunnel construction |
| CN110954676B (en) * | 2019-12-03 | 2021-06-29 | 同济大学 | Visual test device for simulating shield tunneling existing tunnel construction |
| CN116067845A (en) * | 2022-11-23 | 2023-05-05 | 山东大学 | Test device and method for monitoring disturbance of stratum grouting to tunnel structure |
| CN116067845B (en) * | 2022-11-23 | 2024-02-23 | 山东大学 | Test device and method for monitoring disturbance of stratum grouting to tunnel structure |
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