CN103900677A - Experiment model device used for researching induced vibration propagation law in shield driving - Google Patents
Experiment model device used for researching induced vibration propagation law in shield driving Download PDFInfo
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- CN103900677A CN103900677A CN201410126415.3A CN201410126415A CN103900677A CN 103900677 A CN103900677 A CN 103900677A CN 201410126415 A CN201410126415 A CN 201410126415A CN 103900677 A CN103900677 A CN 103900677A
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- precast concrete
- bearing
- shield driving
- induced vibration
- concrete cylinder
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
An experiment model device used for researching an induced vibration propagation law in shield driving comprises a model box, a variable speed motor, a precast concrete cylinder, a metal cutter head and cutter, a bearing and a data collecting system. A side panel of the model box is improved, a vertical angle steel middle upright column is additionally arranged to divide the side panel into a detachable part and an undetachable part, the detachable part is divided into a square plate and a strip plate, the precast concrete cylinder is fixed to the strip plate, the bearing penetrates through the precast concrete cylinder, the variable speed motor drives the metal cutter head and cutter to rotate in the model box through the bearing, the position of the metal cutter head and cutter is adjusted by changing the position of the strip plate, and the data collecting system collects the vibration low of soil displacement, caused by rotation of the metal cutter head and cutter, in the model box.
Description
Technical field
The invention belongs to technical field of civil engineering, relate to a kind of for studying shield driving induced vibration propagation law pilot model apparatus.
Background technology
City underground has that freight volume is large, speed is fast, safety on time, does not take the advantages such as surface road.The selection of urban transportation circuit is carried out according to passenger flow estimation, will certainly be near even passing densely populated areas, as residential block, hospital, scientific research institutions, region, historic site etc., the structural vibration that vehicular traffic causes is passed through stratum (underground or ground) around and is outwards propagated, further bring out secondary vibration and the noise of nearby buildings (comprising furniture etc.), to the long-term particularly structural safety of ancient building of buildings in vibration environment closely, and inner resident and staff's work and daily life, produce very large impact.The environmental problem that Chinese scholars causes track traffic is already classified important topic as, for reason, propagation law, the control measure of generation of vibration and harm etc. is conducted a research, but mainly concentrate on operation stage, for the Subway Vibration problem being caused by construction, especially be mingled with sandy gravel, the gravel stratum of cobble, erratic boulder, the research of this respect is less, is almost blank.
Working-yard actual measurement is the most effective way of research Subway Vibration problem, but owing to limited by field condition, measures operating mode single simultaneously, is difficult to from explanation generation of vibration mechanism such as different cutterhead forms and grain diameter, tunnel thickness of earth-fill covers.And realize full section actual measurement, and will draw mass data, economic input is surprising.Carrying out indoor model test is that field measurement, numerical simulation, the effective of theoretical analysis are supplemented.Can be from propagation and the attenuation law of certain angle explanation vibration.
Summary of the invention
The present invention aims to provide a kind of for studying shield driving induced vibration propagation law pilot model apparatus.It is strong that this device has reliability, there is excellent operability and stronger extendability, for studying different cutterhead forms, grain diameter, thickness of earth-fill cover, cutterhead rotating speed, with the factor such as existing tunnel structure relativeness to shield driving induced vibration propagation attenuation rule.Concrete technical scheme is as follows:
One is used for studying shield driving induced vibration propagation law pilot model apparatus, comprise model casing, variable speed machine, precast concrete cylinder, metal knife disc tool, bearing, and data acquisition system (DAS), add vertical angle steel central post for the side panel transformation of model casing, side panel is divided into removable section and non-dismountable part, removable section is divided into square plate and stripe board, precast concrete cylinder is fixed on removable section, bearing is through precast concrete cylinder, variable speed machine drives metal knife disc tool to rotate in model casing by bearing, adjust metal knife disc tool position by changing removable section position, data acquisition system (DAS) collection is because metal knife disc tool rotates the vibration regularity of the soil body in the model casing causing.
Non-dismountable plate adopts steel plate, and demountable panel adopts aluminium alloy plate.
It is top board that model casing is selected transparent acrylic board.Be easy to take pictures with inspection box near metal cutterhead
Grain Oscillation Amplitude changes.
Metal knife disc tool is made up of rosette and multiple U-shaped metal cutter, and U-shaped metal cutter is fixed on rosette.U-shaped metal cutter is fixed by bolt and rosette, and U-shaped metal cutter is by the multi-form cutterhead of different combine analog
Data acquisition system (DAS) is by WS-5921 signal processing and analysis processing instrument, and 941B ultralow frequency vialog, and vibro-pickup composition, for gathering the speed and the acceleration that rotate land movement in the model casing causing due to metal knife disc tool, frequency acquisition 200Hz.
Beneficial effect
Model casing device of the present invention can be studied shield driving induced vibration propagation law.For studying different cutterhead forms, grain diameter, thickness of earth-fill cover, cutterhead rotating speed, shield driving being caused to the impact of ambient vibration with the factor such as existing tunnel structure relativeness, with low cost, operability good, reliability is high.
Accompanying drawing explanation
Fig. 1: model casing device front elevation in embodiment;
Fig. 2: model casing device vertical view in embodiment;
Fig. 3: concrete prefabricated cylindrical conformation schematic diagram;
Fig. 4: metal cutterhead organigram;
Fig. 5: metal cutter front view;
Fig. 6: metal cutter vertical view.
1, stripe board, 2, square plate, 3, angle steel central post, 4, angle steel supports, 5, crossbeam.
Embodiment:
Model casing framework is welded by L70*5 angle steel, side panel is connected with framework by bolt, in side panel, non-dismountable part is all selected steel plate, detachable part subpanel adopts the thick aluminium alloy plate of 2mm, side removable section is made up of a square plate, 8 block length stripe board, and square plate specification is 450mm × 400mm, elongated plates center drilling diameter 200mm, elongated plates specification is 450mm × 100mm, and demountable panel quantity and size can be adjusted according to actual conditions.In order to reinforce, model casing surrounding is equipped with angle steel and supports, and in the middle of side plate, adds crossbeam reinforcing.
Concrete prefabricated cylinder adopts C30, and two ends are all prefabricated with groove.
Metal cutterhead is the thick circular stainless-steel sheet of 5mm, and on steel plate, drills through the circular hole of diameter 3mm, and circular hole is arranged and quantity arranges by accompanying drawing 5, U-shaped cutter is connected and fixed to composition cutterhead by M2.5 screw and rosette.A rotating shaft is welded in center, the disk back side, weld the annulus of dark 10mm at the disk back side by concrete prefabricated drum diameter, cutterhead is stuck in concrete prefabricated flexible groove and uses oil lubricating, rotating shaft is connected with motor, rotated the simulation shield cutter circumgyration incision soil body by driven by motor rosette.
Can in model casing, lay the soil layer of the different-grain diameters such as miscellaneous fill, silt, clay, powder fine sand, sandy gravel, erratic boulder according to grating, can around cutterhead, settle velocity and acceleration vibro-pickup along cutterhead working direction with vertical cutterhead working direction in different soil, different buried depth and surface, for vibrating measurement.
By dismounting stripe board and square plate, adjust upper-lower position with change cylinder in model casing vertically to position, the thickness of earth-fill cover of simulation shield tunnel changes, the Vibration propagation rule of research different buried depth.
By the multi-form combination of U-shaped cutter on metal dish, simulate the Vibration Condition under multi-form cutterhead.
By adjusting motor speed, can simulate propagation and attenuation law that shield machine vibrates under different rotating speeds condition.The ambient vibration research causing to realize multi-state, multifactor lower sand-pebble layer shield driving.
Claims (3)
1. one kind for studying shield driving induced vibration propagation law pilot model apparatus, comprise model casing, variable speed machine, precast concrete cylinder, metal knife disc tool, bearing, and data acquisition system (DAS), it is characterized in that: add vertical angle steel central post for the side panel transformation of model casing, side panel is divided into removable section and non-dismountable part, removable section is divided into square plate and stripe board, precast concrete cylinder is fixed in stripe board, bearing is through precast concrete cylinder, variable speed machine drives metal knife disc tool to rotate in model casing by bearing, adjust metal knife disc tool position by changing stripe board position, data acquisition system (DAS) collection is because metal knife disc tool rotates the vibration regularity of land movement in the model casing causing.
2. one according to claim 1 is used for studying shield driving induced vibration propagation law pilot model apparatus, it is characterized in that: non-dismountable plate adopts steel plate, and demountable panel adopts aluminium alloy plate.
3. one according to claim 1 is used for studying shield driving induced vibration propagation law pilot model apparatus, it is characterized in that: it is top board that model casing is selected transparent acrylic board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410126415.3A CN103900677A (en) | 2014-03-31 | 2014-03-31 | Experiment model device used for researching induced vibration propagation law in shield driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410126415.3A CN103900677A (en) | 2014-03-31 | 2014-03-31 | Experiment model device used for researching induced vibration propagation law in shield driving |
Publications (1)
| Publication Number | Publication Date |
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| CN103900677A true CN103900677A (en) | 2014-07-02 |
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| CN201410126415.3A Pending CN103900677A (en) | 2014-03-31 | 2014-03-31 | Experiment model device used for researching induced vibration propagation law in shield driving |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014603A (en) * | 2017-06-06 | 2017-08-04 | 中铁隧道集团有限公司 | A kind of experimental method for obtaining different geology operating mode shield cutter exciting forces |
| CN113188994A (en) * | 2021-04-08 | 2021-07-30 | 同济大学 | Excavation surface stability test device and method considering vibration effect of shield cutter head |
| CN114061992A (en) * | 2020-08-06 | 2022-02-18 | 中国电建集团华东勘测设计研究院有限公司 | Assembled model groove device for indoor shield tunneling test and test method thereof |
| CN115420874A (en) * | 2022-07-22 | 2022-12-02 | 山东大学 | Experimental device and method for researching influence of cutter head cutting on excavation face fracture |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620899A (en) * | 2012-04-01 | 2012-08-01 | 北京工业大学 | Self-loading device for test of simulating crustal stress of surrounding rock on rock tunnel shaking table |
| CN103115669A (en) * | 2013-01-22 | 2013-05-22 | 北京工业大学 | Testing apparatus for simulating sandy gravel ground layer shield driving vibration |
-
2014
- 2014-03-31 CN CN201410126415.3A patent/CN103900677A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620899A (en) * | 2012-04-01 | 2012-08-01 | 北京工业大学 | Self-loading device for test of simulating crustal stress of surrounding rock on rock tunnel shaking table |
| CN103115669A (en) * | 2013-01-22 | 2013-05-22 | 北京工业大学 | Testing apparatus for simulating sandy gravel ground layer shield driving vibration |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014603A (en) * | 2017-06-06 | 2017-08-04 | 中铁隧道集团有限公司 | A kind of experimental method for obtaining different geology operating mode shield cutter exciting forces |
| CN107014603B (en) * | 2017-06-06 | 2019-03-15 | 中铁隧道集团有限公司 | A kind of experimental method obtaining different geology operating condition shield cutter exciting forces |
| CN114061992A (en) * | 2020-08-06 | 2022-02-18 | 中国电建集团华东勘测设计研究院有限公司 | Assembled model groove device for indoor shield tunneling test and test method thereof |
| CN113188994A (en) * | 2021-04-08 | 2021-07-30 | 同济大学 | Excavation surface stability test device and method considering vibration effect of shield cutter head |
| CN115420874A (en) * | 2022-07-22 | 2022-12-02 | 山东大学 | Experimental device and method for researching influence of cutter head cutting on excavation face fracture |
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Application publication date: 20140702 |