CN205317774U - Testing system of stratum loss extension in simulation shield tunnel vertical section - Google Patents
Testing system of stratum loss extension in simulation shield tunnel vertical section Download PDFInfo
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- CN205317774U CN205317774U CN201620064662.XU CN201620064662U CN205317774U CN 205317774 U CN205317774 U CN 205317774U CN 201620064662 U CN201620064662 U CN 201620064662U CN 205317774 U CN205317774 U CN 205317774U
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Abstract
The utility model discloses a testing system of stratum loss extension in simulation shield tunnel vertical section, include: model test case, stratum loss model, earth's surface load loading device, seepage flow device, in and earth's surface displacement measurement device, land movement route monitoring devices, stratum loss model includes polyurethane bag (1), connects two water delivery pipe (2) on polyurethane bag (1), and one is arranged in carrying rivers to polyurethane bag (1), derive the rivers in the polyurethane bag (1) for one, fill the solid -state powder that has water soluble in polyurethane bag (1), this solid state powder is in closely piling up in polyurethane bag (1) and propping up the stratum loss model that forms anticipated shape with polyurethane bag (1), utilize water soluble's solid powder sodium carbonate to pack the polyurethane bag, can conveniently make into different shapes, and can keep when experimental that both the tangible form is unchangeable, the stratum loss of different shapes and scale can effectively be simulated to the method.
Description
Technical field
This utility model belongs to underground engineering experimental technique field, metro shield tunneling can be simulated and tunnel the evolution under seepage action of ground water and surface load effect of the Stratum Loss of difformity and the scale caused, cave in for research tunnel vertical section Stratum Loss and the model test of through mechanism provides foundation.
Background technology
Now with the development of urban construction, traffic above-ground is day by day crowded, and subway can effectively solve congested in traffic problem, and wherein shield method is because having speed of application soon, the advantages such as ground environmental effect is little are widely applied in Urban Metro Construction. But shield construction can cause surrounding formations disturbance, construction wrong very easily causes tunnel upper formation damage and then causes the series of problems such as surface subsidence, existing building differential settlement, according to ASSOCIATE STATISTICS, because the surface subsidence accident that the Stratum Loss that shield-tunneling construction causes brings out accounts for the 60% of shield tunnel construction total number of accident, the surface collapse accident that Stratum Loss brings out can cause serious consequence due to its Unpredictability. Therefore, it is necessary to the longitudinal stratum caused for shield-tunneling construction be lost in the slump under seepage action of ground water and surface load effect and through mechanism and cause the ground settlement problem of subsiding further investigate.
The slump of the Stratum Loss caused currently for shield-tunneling construction and through mechanism and cause the research of earth's surface deformation mainly adopt on-the-spot test method, numerical method and model testing method. Model test is based on the theory of similarity, because it is less to have moulded dimension, good economy performance, specific aim is relatively strong, and the advantages such as test data are accurate are widely used in civil engineering research field. In the model investigation of the Stratum Loss extension mechanism caused at shield-tunneling construction at present, main employing water-filled balloon method and air-bag method and ice bag method carry out simulated formation loss. Water-filled balloon method is similar with air-bag method, the embedment water pocket when carrying out the test soil body and filling, and water pocket connects a conduit, and it is external that this conduit extends to proof box, and naturally flowing out and then forming Stratum Loss by Valve controlling water. Air-bag method is to place air bag in proof box body in advance, connects air pump by conduit and is full of by air bag, is subsequently filled in soil body process, after material fills complete and compacting, bleeds off air and namely forms Stratum Loss in the test soil body. Ice bag method has been improved on the basis of water-filled balloon method, replaces the water in water-filled balloon method with ice cube, and puts into heater when ice cube makes and open heater in process of the test and make ice melting, formation Stratum Loss.
Existing analog is with method, and first two method all adopts fluid to form Stratum Loss, and the form and dimension for Stratum Loss pair cannot be carried out accurate control.And in practical study in order to make result have comparative generally require control Stratum Loss shape. 4th kind of method overcomes disadvantages mentioned above, but process medium floe likely melts in the filling soil body. Said method is mainly used in the simulation of tunnel cross section Stratum Loss, and does not consider the impact that seepage flow and ground load etc. act on.
Utility model content
This utility model aims to the deficiencies in the prior art and provides a kind of pilot system simulating the extension of Stratum Loss in shield tunnel vertical section. This system can solve the vertical section direction simulated formation loss unmanageable problem of geomery in existing model test preferably, and can effectively simulate seepage flow and the effect of ground load impact.
In order to achieve the above object, this utility model have employed techniques below scheme:
A kind of pilot system simulating the extension of Stratum Loss in shield tunnel vertical section, including: model test box, Stratum Loss model, surface load charger, seepage apparatus, in and surface displacement measurement apparatus, land movement trace monitor device, the internal filling test soil body of model test box, described Stratum Loss model includes polyurethane bladder (1), polyurethane bladder (1) is upper connects two water inlet conduit (2), one for conveying current in polyurethane bladder (1), one the current in polyurethane bladder (1) are derived, described polyurethane bladder is filled with water-soluble solid state powder in (1), this solid state powder is tightly packed in described polyurethane bladder (1) props up the Stratum Loss model forming anticipated shape by polyurethane bladder (1), surface load charger includes modality vibration exciter (3), force transmitting board (4), vibrator reaction beam (5), described force transmitting board (4) is placed on test soil body surface, modality vibration exciter (3) is pressed on force transmitting board (4), modality vibration exciter (3) top is fixed on vibrator reaction beam (5), described Stratum Loss model adopts multiple arc-shaped polyurethane bladder (1) to be arranged closely together formation.
Described pilot system, described seepage apparatus includes the water tank (6) for providing seepage flow water source and controls valve (7) and conduit (8), the depotition cock (9) of current size.
Described pilot system, in described ground and surface displacement measurement apparatus include being positioned over being used in the test soil body (10) and measure electron displacement meter (11) and the displacement meter fixed cross beam (12) of displacement and surface displacement in ground.
Described pilot system, described model test box is a rectangular structure, and open top is not closed, and for the filling test soil body, model test box front adopts transparent panel (13), and other four faces adopt stainless-steel sheet to make; Transparent panel makes the tunnel model (22) having semi-circular structure, tunnel model (22) and test casing integral production.
Described pilot system, the outer surface of transparent panel (13) is fixed with displacement datum mark (14), is placed with the colored bulb (15) of low friction resistance for showing soil body mobile route in the test soil body of transparent panel (13) inner side.
Described pilot system, also includes land movement trace monitor device, and land movement trace monitor device includes higher frequency camera (16), data wire, computer (18).
Compared with prior art, the beneficial effects of the utility model are:
1, native system utilizes water-soluble pressed powder sodium carbonate filled polyurethane capsule, it is possible to being conveniently fabricated to difformity, and can keep existing shape invariance at the trial, the method can effectively simulate the Stratum Loss of difformity and scale.
2, native system adopts the principle of current dissolved solid powder, it is possible to controls speed that Stratum Loss formed and effectively avoids the impact of module limit Analysis of Field Geotechnical Parameters and the perturbed problem that the soil body is caused, making experimental enviroment more meet engineering practice.
4, native system can the impact on Stratum Loss of the simulated groundwater seepage flow, and control percolation flow velocity by the height of controlling water level.
5, native system by adding vibrator simulation ground load impact on test soil body top.
6, by placing characteristic point in country rock in process of the test, adopt High frequency photographing measurement principle to measure displacement and the path of tunnel upper country rock, adopt displacement meter to measure displacement in the ground in Stratum Loss expansion process simultaneously. And arrange that acceleration transducer measures the Vibration Condition on stratum in the earth formation.
Accompanying drawing explanation
Fig. 1 is polyurethane bladder described in the utility model and conduit;
Fig. 2 is the front view of this utility model assay device;
Fig. 3 is the side view (model test box part carries out cutting along A-A) of this utility model assay device;
Wherein, 1, polyurethane bladder; 2, water inlet conduit; 3, modality vibration exciter; 4, force transmitting board; 5, vibrator reaction beam; 6, water tank; 7, flow cavitation result valve; 8, conduit; 9, depotition cock; 10, the test soil body; 11, electron displacement meter; 12, displacement meter fixed cross beam; 13, transparent panel; 14, displacement datum mark; 15, colored bulb; 16, higher frequency camera; 17, data wire; 18, computer; 19, acceleration transducer; 20, data wire; 21, model test box; 22, tunnel model; 23 electron displacement measurement gauge rods.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is described in detail.
As shown in Figure 1-Figure 3, a kind of pilot system simulating the extension of Stratum Loss in shield tunnel vertical section, including: model test box, Stratum Loss model, surface load charger, seepage apparatus, in and surface displacement measurement apparatus, land movement trace monitor device;
The internal filling test soil body of model test box, described Stratum Loss model includes a polyurethane bladder 1, polyurethane bladder 1 connects two water inlet conduit 2, one for carrying current in polyurethane bladder 1, one the current in polyurethane bladder 1 are derived, described polyurethane bladder 1 is filled with water-soluble solid state powder powdered sodium carbonate, this solid state powder is tightly packed in described polyurethane bladder 1 will prop up the Stratum Loss model forming anticipated shape in polyurethane bladder 1, surface load charger includes modality vibration exciter 3, force transmitting board 4, vibrator reaction beam 5, described force transmitting board 4 is placed on test soil body surface, modality vibration exciter 3 is pressed on force transmitting board 4, modality vibration exciter 3 top is fixed on vibrator reaction beam 5.
Described seepage apparatus includes for providing the water tank 6 at seepage flow water source and controlling valve 7 and conduit 8, the depotition cock 9 of current size.
In described ground and surface displacement measurement apparatus include being positioned over electron displacement meter 11 and the displacement meter fixed cross beam 12 for measuring displacement and surface displacement in ground in the test soil body 10.
Described model test box is a rectangular structure, and open top is not closed, and for the filling test soil body, model test box front adopts transparent panel 13, in order to observe the closed test soil body, and other four faces adopt stainless-steel sheet to make; Transparent panel 13 makes the tunnel model 22 having semi-circular structure, tunnel model 22 and test casing integral production;
The outer surface of transparent panel 13 is fixed with displacement datum mark 14, is placed with the colored bulb 15 of low friction resistance for showing soil body mobile route in the test soil body inside transparent panel 13;
Also include land movement trace monitor device, including higher frequency camera 16, data wire, computer 18.
Test inside soil body is provided with acceleration transducer 19, adopts acceleration transducer 19 measure the acceleration of the soil body above Stratum Loss and transmit a signal to computer 18 by data wire.
Utilizing described difformity Stratum Loss analog systems to carry out vertical section Stratum Loss and extend development under seepage flow and ground load effect, bring out ground settlement model test, being embodied as step is:
1, model test box is made. Experimental box body is a rectangular structure, open top is not closed, for filling the experiment soil body and installing other experimental facilitiess, front adopts transparent panel to observe, other four faces adopt stainless-steel sheet to make, tunnel model is a semi-circular structure, and test casing integral production, and leaves some apertures on tunnel model for discharging dissolving material. Concrete size is determined according to the experiment likelihood ratio.
2, Stratum Loss model is made: first determine shape and the size of Stratum Loss, make polyurethane bladder 1, the shape of the size and dimension of polyurethane bladder and each ring Stratum Loss and equivalently-sized, fill up sodium carbonate and guarantee that sodium carbonate is filled closely knit and taken completely in space in polyurethane bladder, each polyurethane bladder connects two water inlet conduit 2, one is used for intaking, and discharges dissolving material by aperture reserved on tunnel model, forms monocycle Stratum Loss model for one. By multiple monocycle Stratum Loss model longitudinally close arrangement independent of each other.
3, the filling test soil body 10, and electron displacement meter 11 is installed, acceleration transducer 19, place colored bulb 15. The test soil body carries out compaction treatment after having filled, and installs modality vibration exciter 3, force transmitting board 4 and vibrator reaction beam 5 and water tank 6, flow cavitation result valve 7, conduit 8.
4, generate Stratum Loss: construction simulation tunneling process, successively to water filling in compact arranged circular arc polyurethane bladder 1, dissolve powdered sodium carbonate and discharged by another root water-supply-pipe, generating and be longitudinally continuous Stratum Loss.
5, process of the test: open water flow control valve 7, allows current pass through conduit 8 and flows into the test soil body, and open depotition cock 9, allow current flow out model test box 21. Open modality vibration exciter 3, allow it export required load (such as surface car oscillatory load). And measure soil body acceleration by acceleration transducer 19, and signal is transmitted a signal to computer 18 by data wire.
6, test data monitoring: measure and record displacement in earth's surface and ground by electron displacement meter 11 in process of the test, and measure soil body acceleration by acceleration transducer 19, and by signal by data line transfer to computer 18, monitor the expansion process of soil body mobile route and Stratum Loss above Stratum Loss with higher frequency camera 16 simultaneously, be connected to computer 18 by data wire.
It should be appreciated that for those of ordinary skills, it is possible to improved according to the above description or converted, and all these are improved and convert the protection domain that all should belong to this utility model claims.
Claims (6)
1. simulate the pilot system of Stratum Loss extension in shield tunnel vertical section for one kind, it is characterized in that, including: model test box, Stratum Loss model, surface load charger, seepage apparatus, in and surface displacement measurement apparatus, land movement trace monitor device, the internal filling test soil body of model test box, described Stratum Loss model includes polyurethane bladder (1), polyurethane bladder (1) is upper connects two water inlet conduit (2), one for conveying current in polyurethane bladder (1), one the current in polyurethane bladder (1) are derived, described polyurethane bladder is filled with water-soluble solid state powder in (1), this solid state powder is tightly packed in described polyurethane bladder (1) props up the Stratum Loss model forming anticipated shape by polyurethane bladder (1), surface load charger includes modality vibration exciter (3), force transmitting board (4), vibrator reaction beam (5), described force transmitting board (4) is placed on test soil body surface, modality vibration exciter (3) is pressed on force transmitting board (4), modality vibration exciter (3) top is fixed on vibrator reaction beam (5),Described Stratum Loss model adopts multiple arc-shaped polyurethane bladder (1) to be arranged closely together formation.
2. pilot system according to claim 1, it is characterized in that, described seepage apparatus includes the water tank (6) for providing seepage flow water source and controls valve (7) and conduit (8), the depotition cock (9) of current size.
3. pilot system according to claim 1, it is characterized in that, in described ground and surface displacement measurement apparatus include being positioned over being used in the test soil body (10) and measure electron displacement meter (11) and the displacement meter fixed cross beam (12) of displacement and surface displacement in ground.
4. pilot system according to claim 1, it is characterised in that described model test box is a rectangular structure, open top is not closed, for the filling test soil body, model test box front adopts transparent panel (13), and other four faces adopt stainless-steel sheet to make; Transparent panel makes the tunnel model (22) having semi-circular structure, tunnel model (22) and test casing integral production.
5. pilot system according to claim 1, it is characterized in that, the outer surface of transparent panel (13) is fixed with displacement datum mark (14), is placed with the colored bulb (15) of low friction resistance for showing soil body mobile route in the test soil body of transparent panel (13) inner side.
6. pilot system according to claim 1, it is characterised in that also include land movement trace monitor device, land movement trace monitor device includes higher frequency camera (16), data wire, computer (18).
Priority Applications (1)
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| CN201620064662.XU CN205317774U (en) | 2016-01-22 | 2016-01-22 | Testing system of stratum loss extension in simulation shield tunnel vertical section |
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| CN201620064662.XU CN205317774U (en) | 2016-01-22 | 2016-01-22 | Testing system of stratum loss extension in simulation shield tunnel vertical section |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023301A (en) * | 2017-05-23 | 2017-08-08 | 山东大学 | Model test apparatus and method for studying Tunnel Engineering blast simulated acid rain |
| CN110307008A (en) * | 2019-07-01 | 2019-10-08 | 中铁第四勘察设计院集团有限公司 | It is a kind of for simulating the experimental rig and method of slip casting in shield crossing poor strata hole |
| CN110954676A (en) * | 2019-12-03 | 2020-04-03 | 同济大学 | Visual test device for simulating shield tunneling existing tunnel construction |
| CN111878071A (en) * | 2019-11-15 | 2020-11-03 | 中国石油天然气股份有限公司 | Formation simulation system and using method thereof |
| CN113188995A (en) * | 2021-04-27 | 2021-07-30 | 同济大学 | Shield cutter head rotation and earth surface vibration effect excavation surface stability model test device |
| CN114859017A (en) * | 2022-07-06 | 2022-08-05 | 湖南大学 | Stratum stress field and displacement field control test device and method |
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2016
- 2016-01-22 CN CN201620064662.XU patent/CN205317774U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023301A (en) * | 2017-05-23 | 2017-08-08 | 山东大学 | Model test apparatus and method for studying Tunnel Engineering blast simulated acid rain |
| CN107023301B (en) * | 2017-05-23 | 2019-03-12 | 山东大学 | For studying the model test apparatus and method of Tunnel Engineering blast simulated acid rain |
| CN110307008A (en) * | 2019-07-01 | 2019-10-08 | 中铁第四勘察设计院集团有限公司 | It is a kind of for simulating the experimental rig and method of slip casting in shield crossing poor strata hole |
| CN110307008B (en) * | 2019-07-01 | 2024-06-07 | 中铁第四勘察设计院集团有限公司 | Test device and method for simulating grouting in tunnel of shield penetrating bad stratum |
| CN111878071A (en) * | 2019-11-15 | 2020-11-03 | 中国石油天然气股份有限公司 | Formation simulation system and using method thereof |
| CN111878071B (en) * | 2019-11-15 | 2023-08-22 | 中国石油天然气股份有限公司 | Stratum simulation system and application method thereof |
| 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 |
| CN113188995A (en) * | 2021-04-27 | 2021-07-30 | 同济大学 | Shield cutter head rotation and earth surface vibration effect excavation surface stability model test device |
| CN114859017A (en) * | 2022-07-06 | 2022-08-05 | 湖南大学 | Stratum stress field and displacement field control test device and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20180122 |