CN103969012A - Shake table test real-time loading device for simulating different burial depths of rock tunnel - Google Patents

Shake table test real-time loading device for simulating different burial depths of rock tunnel Download PDF

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Publication number
CN103969012A
CN103969012A CN201410146941.6A CN201410146941A CN103969012A CN 103969012 A CN103969012 A CN 103969012A CN 201410146941 A CN201410146941 A CN 201410146941A CN 103969012 A CN103969012 A CN 103969012A
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China
Prior art keywords
test
real
loading
plate
time loading
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CN201410146941.6A
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Chinese (zh)
Inventor
陶连金
侯森
李书龙
郭飞
刘春晓
王珂
黄凯平
吴秉林
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Beijing University of Technology
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Beijing University of Technology
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Priority to CN201410146941.6A priority Critical patent/CN103969012A/en
Publication of CN103969012A publication Critical patent/CN103969012A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a shake table test real-time loading device for simulating different burial depths of a rock tunnel. The shake table test real-time loading device comprises a model case, a real-time loading device body and a data acquisition system. The model case is used for containing test model materials and providing counter force for the real-time loading device body. The loading device body comprises a loading system and a sliding loading plate and used for achieving real-time loading of the test model materials in the ground shake application process. The acquisition system is used for monitoring real-time soil pressure of the test model materials in the real-time loading process. The device is used for solving the simulation problem of surrounding rock stress fields under the different burial depths in the shake table test process and can conduct loading when a test model shears and deforms in the vibration process, true real-time loading is achieved, the loading situation is monitored, and convenience is brought to research on power reaction of the tunnel under different burial depths. An air bag loading mode is adopted, shake table test loading can be conducted and meanwhile the mass of the model case can be reduced to the maximum degree.

Description

The shaketalle test real-time loading device of simulation rock tunnel different buried depth
Technical field
The invention belongs to underground works test apparatus technical field, relate to a kind of shaketalle test real-time loading device for simulation rock tunnel different buried depth.
Background technology
In Wenchuan earthquake, many tunnels are badly damaged, and have occurred the phenomenons such as lining cutting cracking, heave, reinforcing bar exposure, water seepage of tunnel.Along with the Large scale construction of vcehicular tunnel, underground structure is carried out antidetonation, damping research and is obtained just gradually people's concern, shaketalle test is one of effective means of carrying out at present tunnel anti-seismic performance research.Due to public, often buried depth is larger for railway tunnel, while there is earthquake, tunnel structure under high-ground stress active state with country rock associated movement, but due to the restriction of shaking table condition at present, also cannot be on shaking table simulation tunnel truly bear the state of terrestrial stress.The shaketalle test in the simulation rock tunnel having done, primary stress field does not meet scaling law substantially, does not consider the loading to test model, is not so just inconsistent with the actual fact.Therefore,, in the Large-scale Shaking Table Test of rock tunnel, to the simulation of primary stress field, and the simulation under different buried depth state is problem demanding prompt solution always to test model.
Summary of the invention
The object of the present invention is to provide a kind of shaketalle test real-time loading device that is applicable to simulation rock tunnel different buried depth.Overcome the obvious distortion of current acceleration of gravity ratio of similitude, and cannot counterweight, cause testing the deficiency of serious distortion, solve in different buried depth situation, the problem of modelling of stress field of the surrounding rock, and can, to the test model in vibration processes, in the situation that there is detrusion, load, really realize real-time loading, and load condition is monitored.
1. a shaketalle test real-time loading device for simulation rock tunnel different buried depth, is characterized in that,
Described device comprises model casing, real-time loading device and data acquisition system (DAS); Wherein, described model casing is used for holding test model material and provides counter-force for real-time loading device; Described real-time loading device comprises loading system, sliding loaded plate, applying in earthquake motion process the real-time loading of realizing described test model material; Described acquisition system, in real-time loading process, is monitored the real-time soil pressure of described test model material.
Described loading system comprises air bag (10), air compressor and reduction valve; Described air compressor is used for providing pressurized air to described reduction valve, described reduction valve is connected with described air compressor, by regulating described reduction valve, make the air pressure of exporting in described air bag (10) reach predetermined value, described air bag (10) is connected with described reduction valve, loads to realize level pressure.Air bag (10) is placed in model casing;
Described sliding loaded plate is installed between air bag (10) and test model material, for pressure-acting that air bag (10) is provided in test model material, and to test model material in vibration processes, occurring, in the situation of shear displacemant, provides real-time loading.Described sliding loaded plate comprises load plate 1(1), load plate 2(2) and slip steel ball (3), described load plate 1(1) be installed on described air bag bottom, lower surface is provided with arc track, for the horizontal shift of slip steel ball is provided; Load plate 2(2) be installed on test model material top, upper surface is provided with spherical hole, for placing slip steel ball; Slip steel ball (3) is placed in load plate 2(2) in, and with load plate 1(1) be connected, for horizontal shift is provided.
Described model casing is by 4 side plates, 1 top cover, 1 poly (methyl methacrylate) plate, 1 pedestal, and two polyethylene foam sheets form, 4 described side plates are front side board (4), two side plates (5), and back side panel (7), wherein front side board (4) adopts the mode of welding to be connected with side plate (5) and pedestal (6), and back side panel (7) is made up of two parts steel plate, and by bolt and pedestal (6), side plate (5) is connected, be beneficial to described test model material is filled, poly (methyl methacrylate) plate (8) is connected with front side board (4) by bolt, be beneficial to the observation in vibration processes to described test model material, top cover (9) is connected by bolt with side plate, for described air bag (10) provides counter-force, described polyethylene foam sheet (11) is placed in model casing, be connected with side plate (5), be beneficial to the Free Transform of described test model material in vibration processes, eliminate boundary effect.
3. the shaketalle test real-time loading device of simulation rock according to claim 1 tunnel different buried depth, it is characterized in that, described data acquisition system (DAS) comprises multiple soil pressure sensors, described soil pressure sensor is positioned at described test model material internal, for its inner soil pressure of Real-Time Monitoring.
4. the shaketalle test real-time loading device of simulation rock according to claim 1 tunnel different buried depth, it is characterized in that, described data acquisition system (DAS) also comprises data collecting instrument and computing machine, described data acquisition system (DAS) is connected with described soil pressure sensor by wire, be used for recording sensing data, described data collecting instrument is connected with described computing machine by data line, for realizing checking field test data.
Beneficial effect
The first, by this application of installation in shaketalle test, can carry out real-time loading to the test model in vibration processes;
The second, utilize this device can simulate under different buried depth condition, the dynamic response of test model;
Three, adopt loading by air bag mode, it is more lasting, stable to make to load, and its quality is less, can farthest reduce to test the weight of casing, and the vibrations of more real reaction test model reaction.
Brief description of the drawings
Fig. 1 is the front view of embodiment;
Fig. 2 is the subsequent figures of embodiment;
Fig. 3 is the side view of embodiment;
Fig. 4 is the vertical view of embodiment;
Fig. 5 is the cut-open view of embodiment;
Fig. 6 is the sliding loaded plate sectional view of embodiment;
Load plate 1 upward view that Fig. 7 (a) is embodiment;
Load plate 2 vertical views that Fig. 7 (b) is embodiment.
In figure, 1, load plate 1,2, load plate 2,3, slip steel ball, 4, front side board, 5, side plate, 6, pedestal, 7, back side panel, 8, poly (methyl methacrylate) plate, 9, top cover, 10, air bag, 11, polyethylene foam sheet
Specific implementation method
For making above-mentioned purpose of the present invention, feature and advantage can be more understandable, below in conjunction with the drawings and specific embodiments, embodiments of the invention are described in further detail.
With reference to Fig. 5, Fig. 5 is the shaketalle test real-time loading device sectional view of simulation rock of the present invention tunnel different buried depth.
When test, concrete operations mode is described below:
1, building of the front preliminary work of test and test model: prepare test required analog material, sensor and data acquisition unit, and check that whether required instrument and equipment is normal, utilize model casing to carry out placement layer by layer to test model, and maintenance make test model fully dry.
2, the installation of model casing: first model casing is lifted to shaking table, by bolt, model casing is connected with shaking table, then the lower part of back side panel is connected with pedestal and side plate with bolt, then filling test cast material is to lower part side plate top, install again part side plate, in like manner, then fill, to specified altitude assignment, sliding loaded plate and air bag are installed.
3, mounting cover of model casing: after second step completes, top cover is lifted to air bag, be connected with side plate by bolt, as shown in Figure 5.
4, loading by air bag: utilize air compressor for test gasbag pressurizes, and according to testing requirements, utilize reduction valve to regulate the force value in corresponding loading air bag, model is vertically loaded.
5, power loads: after loading by air bag finishes, and according to testing requirements, input seismic event, Vibration on Start-up platform, and record the data of each sensor.
Introduce, applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.

Claims (4)

1. the shaketalle test real-time loading device of simulation rock tunnel different buried depth, is characterized in that, comprises model casing, real-time loading device and data acquisition system (DAS); Wherein, described model casing is used for holding test model material and provides counter-force for real-time loading device; Described real-time loading device comprises loading system and sliding loaded plate, applying in vibrations process the real-time loading of realizing described test model material; Described acquisition system, in real-time loading process, is monitored the real-time soil pressure of described test model material;
Described loading system comprises air bag (10), air compressor and reduction valve; Air compressor is used for providing pressurized air to described reduction valve, by regulating reduction valve, makes the air pressure of exporting in air bag (10) reach predetermined value; Air bag (10) is placed in model casing;
Described sliding loaded plate is installed between air bag (10) and test model material, for pressure-acting that air bag (10) is provided in test model material, and to test model material in vibration processes, occurring, in the situation of shear displacemant, provides real-time loading; Described sliding loaded plate comprises load plate 1(1), load plate 2(2) and slip steel ball (3), described load plate 1(1) be installed on described air bag bottom, lower surface is provided with arc track, for the horizontal shift of slip steel ball is provided; Described load plate 2(2) be installed on test model material top, upper surface is provided with spherical hole, for placing slip steel ball.
2. the shaketalle test real-time loading device of simulation rock according to claim 1 tunnel different buried depth, is characterized in that, described model casing is by 4 side plates, 1 top cover, 1 poly (methyl methacrylate) plate, 1 pedestal, and two polyethylene foam sheets form, 4 described side plates are front side board (4), two side plates (5), and back side panel (7), wherein front side board (4) and side plate (5), pedestal (6) adopts the mode of welding to connect, and back side panel (7) is made up of two parts steel plate, and by bolt and pedestal (6), side plate (5) is connected, be beneficial to described test model material is filled, poly (methyl methacrylate) plate (8) is connected with front side board (4) by bolt, be beneficial to the observation in vibration processes to described test model material, top cover (9) is connected by bolt with side plate, for described air bag (10) provides counter-force, described polyethylene foam sheet (11) is placed in model casing, be connected with side plate (5).
3. the shaketalle test real-time loading device of simulation rock according to claim 1 tunnel different buried depth, it is characterized in that, described data acquisition system (DAS) comprises multiple soil pressure sensors, and soil pressure sensor is positioned at described test model material internal, for its inner soil pressure of Real-Time Monitoring.
4. the shaketalle test real-time loading device of simulation rock according to claim 1 tunnel different buried depth, it is characterized in that, described data acquisition system (DAS) also comprises data collecting instrument and computing machine, data acquisition system (DAS) is connected with soil pressure sensor, be used for recording sensing data, described data collecting instrument is connected with computing machine, for realizing checking field test data.
CN201410146941.6A 2014-04-13 2014-04-13 Shake table test real-time loading device for simulating different burial depths of rock tunnel Pending CN103969012A (en)

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CN104316282A (en) * 2014-10-21 2015-01-28 水利部交通运输部国家能源局南京水利科学研究院 Geotechnical engineering shaking table test overburden pressure loading method
CN106950111A (en) * 2017-05-22 2017-07-14 西南交通大学 A kind of pseudo-dynamic equation method
CN104535422B (en) * 2015-01-04 2017-08-04 中国矿业大学 A kind of method of simulation test drilling deformation
CN107192622A (en) * 2017-05-22 2017-09-22 西南交通大学 One kind intends underground structure experimental method
CN108331041A (en) * 2018-02-28 2018-07-27 三峡大学 A kind of experimental rig and method of soil anchor drawing
CN108872530A (en) * 2018-05-06 2018-11-23 北京工业大学 A kind of full-scale model test device for simulating asymmetric small-clear-distance tunnel digging process
CN110501144A (en) * 2019-07-01 2019-11-26 北京交通大学 A kind of simulation system of heavy haul railway Tunnel Base Structural defect
CN110567665A (en) * 2019-10-10 2019-12-13 河北建筑工程学院 Vibration reduction and isolation model test device for railway vibration source
CN113132965A (en) * 2021-03-30 2021-07-16 中国矿业大学 Emergency rescue sensing network test platform and test method thereof

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316282A (en) * 2014-10-21 2015-01-28 水利部交通运输部国家能源局南京水利科学研究院 Geotechnical engineering shaking table test overburden pressure loading method
CN104535422B (en) * 2015-01-04 2017-08-04 中国矿业大学 A kind of method of simulation test drilling deformation
CN106950111A (en) * 2017-05-22 2017-07-14 西南交通大学 A kind of pseudo-dynamic equation method
CN107192622A (en) * 2017-05-22 2017-09-22 西南交通大学 One kind intends underground structure experimental method
CN107192622B (en) * 2017-05-22 2019-09-10 西南交通大学 A kind of quasi- underground structure experimental method
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CN108331041A (en) * 2018-02-28 2018-07-27 三峡大学 A kind of experimental rig and method of soil anchor drawing
CN108872530A (en) * 2018-05-06 2018-11-23 北京工业大学 A kind of full-scale model test device for simulating asymmetric small-clear-distance tunnel digging process
CN110501144A (en) * 2019-07-01 2019-11-26 北京交通大学 A kind of simulation system of heavy haul railway Tunnel Base Structural defect
CN110567665A (en) * 2019-10-10 2019-12-13 河北建筑工程学院 Vibration reduction and isolation model test device for railway vibration source
CN113132965A (en) * 2021-03-30 2021-07-16 中国矿业大学 Emergency rescue sensing network test platform and test method thereof

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Application publication date: 20140806