CN105628893B - Model test device for simulating karst covering soil subsidence caused by subway vibration in karst region - Google Patents
Model test device for simulating karst covering soil subsidence caused by subway vibration in karst region Download PDFInfo
- Publication number
- CN105628893B CN105628893B CN201610003141.8A CN201610003141A CN105628893B CN 105628893 B CN105628893 B CN 105628893B CN 201610003141 A CN201610003141 A CN 201610003141A CN 105628893 B CN105628893 B CN 105628893B
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- Prior art keywords
- karst
- subway
- simulation
- funnel
- limestone
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- 239000002689 soil Substances 0.000 title claims abstract description 15
- 238000012360 testing method Methods 0.000 title claims abstract description 10
- 238000004088 simulation Methods 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 31
- 235000019738 Limestone Nutrition 0.000 claims abstract description 27
- 239000006028 limestone Substances 0.000 claims abstract description 27
- 230000001133 acceleration Effects 0.000 claims abstract description 23
- 238000005303 weighing Methods 0.000 claims abstract description 13
- 239000004927 clay Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 4
- 239000010440 gypsum Substances 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920005479 Lucite® Polymers 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Abstract
The invention relates to a mode test device for simulating karst covering soil subsidence caused by subway vibration in a karst region. The mode test device comprises a main body structure, an exciting system and a measuring system, wherein the main body structure comprises a model case, a subway simulation tunnel as well as limestone simulation materials, karst cavities, a karst funnel and karst covering soil which form an underground karst structure; the exciting structure comprises electromagnetic vibration exciters arranged inside the subway simulation tunnel and an exciting controller arranged outside the subway simulation tunnel; the measuring system comprises acceleration sensors, data acquisition instruments, soil mass weighing devices and a camera. The subway vibration is simulated by the exciting device in the subway simulation tunnel; the vibration acceleration at the karst funnel is measured by the acceleration sensors; the mass of falling soil mass is measured by using the soil mass weighing devices; the deformation process of the earth ground is recorded and observed by the camera. The mode test device disclosed by the invention is applied to the technical fields such as geological engineering and geotechnical engineering and can reveal the mechanism of initiating the karst covering soil subsidence by the subway vibration in the karst region and a surface subsidence rule.
Description
Technical field
The invention belongs to Geological Engineering, Geotechnical Engineering field, shaken more particularly, to one kind simulation karst area subway
The dynamic model test apparatus for triggering karst earthing to collapse.
Background technology
In recent years, in shallow embedding Karst Area, train vibration is not only karst earthing and collapses domestic existing more construction of subway
Sunken cause is collapsed factor, and its harm for causing is also great.Subway line is often built in the urban center domain of building dense,
It is the important component of urban construction, railcar vibration may produce extremely serious influence to city shallow embedding karst, directly
Connect safety along influence track traffic.At present, the research of Rock And Soil deformation is triggered to focus primarily upon non-karst soil to Subway Vibration
Whether body tunnel, the research work about karst region iron simulation tunnel focuses primarily upon the construction period, can for shallow embedding karst earthing
Collapsed because of vibration and potentially collapsed mode and feature all recognize not deeply, correlative study is urgently carried out.
The content of the invention
A kind of simulation karst area Subway Vibration provided the invention aims to overcome above-mentioned technological deficiency draws
The model test apparatus that hair karst earthing is collapsed.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of simulation karst area Subway Vibration triggers the model test apparatus that karst earthing is collapsed, it is characterised in that this
Invention be related to content include agent structure, excitation system and measuring system.
Described agent structure includes model casing, subway simulation tunnel and constitutes the limestone simulation material of underground karst structure
Material, karst cavity, Karst funnel and karst earthing.Described model casing main body frame is welded by angle steel, front panel by
Lucite is constituted, and the back side, side, bottom panel are made up of steel plate；Described subway simulation tunnel is mixed by gypsum+glass fibre
Condensation material is made；Described limestone simulation material is made up of gypsum；Described karst cavity, Karst funnel will be according to actual karst
Structure is piled up by limestone simulation material and formed；The natural clay that described karst earthing is gathered using karst area.
Described excitation system includes the exciting controller of the electromagnetic exciter set in subway simulation tunnel and outside.Institute
The electromagnetic exciter stated need to be installed in subway simulation tunnel according to underground railway track pattern, be used to simulate subway train running
In between track produce vertical motion；Described exciting controller can control each electromagnetic exciter excited frequency, intensity and
Time.
Described measuring system includes acceleration transducer, data collecting instrument, soil body weighing device and video camera.Described
Acceleration transducer is arranged near Karst funnel in limestone simulation material, is used to measure Karst funnel limestone simulation material nearby
In two to acceleration (horizontal acceleration, vertical acceleration)；Described data collecting instrument is used to gather, records acceleration transducer
Measurement data；Described soil body weighing device is arranged on immediately below karst cavity bottom, Karst funnel, is used to measure from karst leakage
Drop the quality of clay in bucket；Described video camera just keeps being synchronized with the movement to model casing front and with model casing, is used to observe
Record clay collapse process and clay areal deformation.
Subway Vibration is simulated by exciting device in subway simulation tunnel, is measured at Karst funnel by acceleration transducer
Vibration acceleration, is dropped soil body quality using soil body weighing device measurement, according to shooting record observation earth's surface deformation process.We
Method is applied to Geological Engineering, Geotechnical Engineering field, can disclose karst area Subway Vibration and trigger karst earthing to collapse machine
Reason and surface subsidence rule.
To sum up, the inventive method principle is：Using model test means, run using electromagnetic exciter simulation subway train
During between track produce vertical motion, by acceleration transducer, weighing device and camera record vibration processes
Middle karst earthing collapses overall process, discloses karst area Subway Vibration and triggers karst earthing to collapse mechanism and surface subsidence rule.
In specific implementation, electromagnetic exciter need to be installed in subway simulation tunnel according to underground railway track pattern first,
Model lower box part load limestone simulation material, will install electromagnetic exciter subway simulation tunnel load model casing, continue to
Limestone simulation material is loaded in model casing, need to ensure closely to be connected between limestone simulation material and subway simulation tunnel, in filling
Karst cavity and Karst funnel are set during limestone simulation material, and wherein casting outlet and weighing device is arranged on karst sky
Immediately below bottom of chamber portion, Karst funnel, acceleration transducer is installed in limestone simulation material near Karst funnel, clay is filled
Above limestone simulation material, it is desirable to clay back cover at Karst funnel, electromagnetic exciter is connected with exciting controller, is accelerated
Degree sensor is connected with data collecting instrument.After after limestone simulation material in model casing and clay stabilization by consolidation, by exciting control
Device starts the electromagnetic exciter simulation Subway Vibration in subway simulation tunnel, is measured near Karst funnel by acceleration transducer
Two to acceleration, the matter of the clay that dropped from Karst funnel using casting outlet and weighing device measurement in limestone simulation material
Amount, according to video camera observed and recorded clay collapse process and clay areal deformation.
Brief description of the drawings
Fig. 1 is structural representation of the invention (front view).
Fig. 2 is side view of the invention.
In Fig. 1,1 model casing, 2 subway simulation tunnels, 3 limestone simulation materials, 4 karst cavitys, 5 Karst funnels, 6 clays, 7
Electromagnetic exciter, 8 exciting controllers, 9 acceleration transducers, 10 data collecting instruments, 11 casting outlets and weighing device, 12 shootings
Machine.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
In specific embodiment, as shown in figure 1, electromagnetic exciter 7 is installed into ground swage according to underground railway track pattern first
Intend in tunnel 2, limestone simulation material 3 is loaded in the bottom of model casing 1, the subway simulation tunnel 2 that will install electromagnetic exciter 7 is filled
Enter model casing 1, continue, to limestone simulation material 3 is loaded in model casing 1, limestone simulation material 3 and subway simulation tunnel 2 need to be ensured
Between closely connect, karst cavity 4 and Karst funnel 5, wherein casting outlet are set during filling limestone simulation material 3
And weighing device 11 is arranged on the bottom of karst cavity 4, the underface of Karst funnel 5, the limestone simulation material 3 near Karst funnel 5
Middle installation acceleration transducer 9, clay 6 is filled in the top of limestone simulation material 3, it is desirable to which clay 6 is sealed at Karst funnel 5
Bottom, electromagnetic exciter 7 is connected with exciting controller 8, acceleration transducer 9 is connected with data collecting instrument 10.In treating model casing 1
After limestone simulation material 3 and the stabilization by consolidation of clay 6, the electromagnetic exciter in subway simulation tunnel 2 is started by exciting controller 8
7 simulation Subway Vibrations, by the measurement of acceleration transducer 9 Karst funnel 5 nearby limestone simulation material 3 two to acceleration, profit
The quality of the clay 6 that dropped from Karst funnel 5 is measured with casting outlet and weighing device 11, it is glutinous according to the observed and recorded of video camera 12
Native 6 collapse process and the areal deformation of clay 6.
Claims (1)
1. a kind of simulation karst area Subway Vibration triggers the model test apparatus that karst earthing is collapsed, it is characterised in that this mould
Type experimental rig includes agent structure, excitation system and measuring system；
Described agent structure include model casing, subway simulation tunnel and constitute underground karst structure limestone simulation material (3),
Karst cavity, Karst funnel (5) and karst earthing；
Described subway simulation tunnel is made up of gypsum+glass fibre mixing material；
Described limestone simulation material (3) is made up of gypsum；
The natural clay (6) that described karst earthing is gathered using karst area；Described karst cavity, Karst funnel are by basis
Actual karst structure is piled up by limestone simulation material and formed；
Described excitation system includes the exciting controller of the electromagnetic exciter set in subway simulation tunnel and outside；
Described electromagnetic exciter is installed in subway simulation tunnel according to underground railway track pattern, is used to simulate subway train operation
During between track produce vertical motion；
Described measuring system includes acceleration transducer, data collecting instrument, soil body weighing device and video camera；
Described acceleration transducer is arranged near Karst funnel in limestone simulation material, is used to measure Karst funnel ash nearby
Two to acceleration in rock simulation material；
Described soil body weighing device is arranged on immediately below karst cavity bottom, Karst funnel, is used to measure from Karst funnel
Drop the quality of natural clay (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610003141.8A CN105628893B (en) | 2016-01-04 | 2016-01-04 | Model test device for simulating karst covering soil subsidence caused by subway vibration in karst region |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610003141.8A CN105628893B (en) | 2016-01-04 | 2016-01-04 | Model test device for simulating karst covering soil subsidence caused by subway vibration in karst region |
Publications (2)
| Publication Number | Publication Date |
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| CN105628893A CN105628893A (en) | 2016-06-01 |
| CN105628893B true CN105628893B (en) | 2017-05-24 |
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| CN201610003141.8A Expired - Fee Related CN105628893B (en) | 2016-01-04 | 2016-01-04 | Model test device for simulating karst covering soil subsidence caused by subway vibration in karst region |
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Families Citing this family (11)
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|---|---|---|---|---|
| CN106645634B (en) * | 2016-10-14 | 2019-08-06 | 西京学院 | A kind of earth's surface simulator and its experimental method |
| CN107240346B (en) * | 2017-07-20 | 2022-10-21 | 长江水利委员会长江科学院 | Test simulation device and method for quantitatively researching karst collapse |
| CN107505448B (en) * | 2017-09-12 | 2020-08-14 | 同济大学 | Seepage erosion model device, system and test method caused by underground pipeline damage |
| CN107884548B (en) * | 2017-10-27 | 2023-12-15 | 西南石油大学 | Underground engineering geological disaster teaching demonstration device and method |
| CN107989618A (en) * | 2017-11-27 | 2018-05-04 | 河南工业大学 | A kind of natural arch simulator |
| CN108181070A (en) * | 2017-12-26 | 2018-06-19 | 桂林理工大学 | A kind of test method simulated mining vibration and cause karst collapse |
| CN108333036B (en) * | 2017-12-29 | 2020-10-30 | 浙江科技学院 | Model experiment device for causing ground long-term settlement in high-concentration area overlapping tunnel operation |
| CN108362856B (en) * | 2017-12-29 | 2020-08-04 | 浙江科技学院 | Model experiment device for simulating long-term ground settlement of urban high-density area |
| CN108332710B (en) * | 2017-12-29 | 2020-07-14 | 浙江科技学院 | Model experiment device for simulating long-term ground settlement of dense building group area |
| CN108241049B (en) * | 2017-12-29 | 2021-03-02 | 河海大学 | Simulation monitoring system for multi-cause ground collapse condition and using method thereof |
| CN113075381A (en) * | 2021-03-15 | 2021-07-06 | 华南理工大学 | Test system for simulating karst earthing collapse caused by subway vibration in karst area |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2530825A1 (en) * | 1982-07-21 | 1984-01-27 | Geostock | Method of detecting permeable zones in advancing underground works |
| SU1399805A1 (en) * | 1985-11-19 | 1988-05-30 | Стахановский Филиал Коммунарского Горно-Металлургического Института | Device for modeling carst |
| CN102426396B (en) * | 2011-09-05 | 2013-10-16 | 同济大学 | Testing apparatus for simulating deep-displacement-initiated strata deformation coordination mechanism |
| CN103528831A (en) * | 2012-07-03 | 2014-01-22 | 西南交通大学 | Multi-target-proportion vehicle body vibration characteristic comprehensive test platform |
| CN203132854U (en) * | 2013-01-22 | 2013-08-14 | 北京工业大学 | Test device used for simulating stratum deformation triggered by subway shield tunnel construction |
| CN104792966B (en) * | 2015-04-08 | 2016-06-15 | 西南交通大学 | A kind of testing apparatus and method simulating subway shield tunnel construction initiation cavity, stratum |
| CN204924690U (en) * | 2015-09-28 | 2015-12-30 | 兰州资源环境职业技术学院 | Experimental device for geological engineering |
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