CN105784975A - Rig for testing slip-slope geotechnical model - Google Patents
Rig for testing slip-slope geotechnical model Download PDFInfo
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- CN105784975A CN105784975A CN201610322701.6A CN201610322701A CN105784975A CN 105784975 A CN105784975 A CN 105784975A CN 201610322701 A CN201610322701 A CN 201610322701A CN 105784975 A CN105784975 A CN 105784975A
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The invention provides a rig for testing a slip-slope geotechnical model. The rig comprises an airflow generator which is arranged above a geotechnical model slope, wherein the airflow generator is of a conical tube structure, at least one tangential air inlet is formed in the downside of the airflow generator, an air outlet is formed in the upside of the airflow generator, the airflow generator is connected with a model casing through a first connecting rod and a second connecting rod, a wind inlet which is located in the top of the model casing is formed in the top of the first connecting rod, a wind outlet which is located in the top of the model casing is formed in the top of the second connecting rod, both the wind inlet and the wind outlet are of horn-shaped structures, the wind inlet is connected with the tangential air inlet through a pipeline, and the wind outlet is connected with the air outlet through a pipeline. The rig for testing the slip-slope geotechnical model, provided by the invention, can be used for generating airflow outside the geotechnical model, so that the influence on slip slopes caused by extreme airflow conditions such as typhoon and tornado can be simulated in a centrifugal model test.
Description
Technical field
The present invention relates to landslide physical technical field, particularly a kind of device for the geotechnical model test that comes down.
Background technology
In research work to landslide mechanism, the method for use mainly can be attributed to: the inspection of the scene of a crime and test, field monitoring, theory analysis and numerical computations, and the method such as physical experiments.Complexity due to landslide mechanism so that adopt one of physical experiments important research means having become the generation of reproduction landslide.
Landslide physical model test belongs to geomechanical model test category, and its theory stems from structural model test.Slope model test is the experimental technique in geomechanical model test for this particular studies object that comes down, the experimental stage such as the architecture model test of its development experience, the test of bottom surface friction model, on-the-spot three-dimensional and full scale model test, hydraulic gradient model test, geotechnical centrifugal model test, geomechanical model test majority conventional both at home and abroad at present is architecture model test and two kinds of forms of centrifugal model test.
Centrifugal model test utilizes, due to it, the centrifugal force simulated gravity that geotechnical centrifuge high speed rotating produces, when Ng, enable to the stress of small size centrifugal model, strain is same or similar with prototype, therefore it is used widely in research on landslide, now in centrifugal model test, pass through vibration table, dewatering device simulation earthquake, the existing lot of documents of situation about raining has disclosed, such as, disclosed in Chinese patent CN204108697U a kind of rainer for geotechnical centrifugal model test, the disclosed rainfall simulation method for centrifugal model of CN104391103A and device thereof；But in centrifugal model test, how to simulate the extreme airflow condition such as typhoon, tornado, thus study its impact on landslide then also do not have correlational study.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of landslide building model test apparatus, to reduce or to avoid problem noted earlier.
For solving above-mentioned technical problem, the present invention proposes a kind of landslide building model test apparatus, it is arranged on the model casing placing geotechnical model, it includes being arranged at the flow generator above described geotechnical model slope, described flow generator is cone cylinder structure, it is provided with at least one tangential admission mouth below, it is provided above a gas outlet, described flow generator is connected with described model casing by a head rod and second connecting rod, described head rod top is provided with a mouth of calling prisoners in after letting them out for exercise being positioned at described model casing top, described second connecting rod top is provided with an air outlet being positioned at described model casing top, described mouth of calling prisoners in after letting them out for exercise is horn-like structure with described air outlet, described mouth of calling prisoners in after letting them out for exercise is connected with described tangential admission mouth by pipeline, described air outlet is connected with described gas outlet by pipeline.
Preferably, described gas outlet is provided with electromagnetic valve.
Preferably, mouth of calling prisoners in after letting them out for exercise described in is provided with electromagnetic valve.
Preferably, the distance on described tangential admission mouth and described flow generator base is not less than the 1/8 of the height of described flow generator.
Preferably, described tangential admission mouth and described flow generator base are the inclination angle of 3-8 degree with an angle.
Preferably, the distance of the tangent line in parallel of described tangential admission mouth and described flow generator inwall is 2-5mm.
A kind of device for the geotechnical model test that comes down proposed by the invention, its can at the externally-generated air-flow of geotechnical model, thus the impact on landslide of the extreme airflow condition such as typhoon, tornado can be simulated in centrifugal model test.
Accompanying drawing explanation
The following drawings is only intended to, in the present invention being schematically illustrated and explaining, not delimit the scope of the invention.Wherein,
Fig. 1 is shown that the structural representation of geotechnical centrifuge；
Fig. 2 is shown that the structural principle schematic diagram of a kind of device for the geotechnical model test that comes down of a specific embodiment according to the present invention；
The schematic cross-section of the tangential admission mouth of the flow generator that Fig. 3 is shown that in Fig. 2；
The cross-sectional view of the flow generator that Fig. 4 is shown that in Fig. 2.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and effect are more clearly understood from, now comparison accompanying drawing illustrates the specific embodiment of the present invention.Wherein, identical parts adopt identical label.
The structural representation of the geotechnical centrifuge that Fig. 1 shows；Shown in Figure 1, in centrifugal model test, centrifugal model is generally arranged in a model casing, this model casing is placed in the hanging basket 1 of geotechnical centrifuge, when described geotechnical centrifuge high speed rotating, described hanging basket 1 will produce the centrifugal acceleration of Ng, at this moment, undersized centrifugal model can obtain and the same or analogous stress of prototype, strain, also just can realize the research on landslide to actual massif side slope.Under normal circumstances, when Study of Landslides, the centrifugal acceleration of geotechnical centrifuge can at more than 30g, even more than 50g.Therefore, having high velocity air outside model casing and produce, but the model casing owing to using in usual centrifugal model test is open type structure, therefore in model casing, the air-flow outside centrifugal model is relatively steady, the namely air-flow geo-stationary outside centrifugal model.
Fig. 2 is shown that the structural principle schematic diagram of a kind of device for the geotechnical model test that comes down of a specific embodiment according to the present invention；The schematic cross-section of the tangential admission mouth of the flow generator that Fig. 3 is shown that in Fig. 2；The cross-sectional view of the flow generator that Fig. 4 is shown that in Fig. 2.nullShown in Fig. 2-4，In order to the air-flow outside control centrifugal model，Thus typhoon can be simulated in centrifugal model test、The extreme air-flow such as tornado，The invention provides a kind of device for the geotechnical model test that comes down，It is arranged on the model casing 3 placing geotechnical model 2，It includes being arranged at the flow generator 41 above described geotechnical model 2 slope，Described flow generator 41 is cone cylinder structure，It is provided with at least one tangential admission mouth 4111 below，It is provided above a gas outlet 412，Described flow generator 41 is connected with described model casing 3 by a head rod 42 and second connecting rod 43，Described head rod 42 top is provided with a mouth 44 of calling prisoners in after letting them out for exercise being positioned at described model casing 3 top，Described second connecting rod 43 top is provided with an air outlet 45 being positioned at described model casing 3 top，Described mouth 44 of calling prisoners in after letting them out for exercise is horn-like structure with described air outlet 45，Described mouth 44 of calling prisoners in after letting them out for exercise is connected with described tangential admission mouth 4111 by pipeline，Described air outlet 45 is connected with described gas outlet 412 by pipeline.
In installation process, described model casing 3 top can arrange crossbeam, thus described first connection 42 and described second connecting rod 43 can be fixed, described head rod 42 is arranged in the described model casing 3 side, windward side at rotary course, and described second connecting rod 43 is arranged in the described model casing 3 lee face side at rotary course.
When geotechnical centrifuge high speed rotating, the air-flow of described tangential admission mouth 411 is entered into due to cross section reduction by described mouth 44 of calling prisoners in after letting them out for exercise, therefore flow velocity increases, thus after entering described flow generator 41 from described tangential admission mouth 411, cyclone gas field can be produced in described flow generator 41, also negative pressure will be formed outside described geotechnical model 2, thus tornado etc. can be simulated can produce the extreme airflow condition of negative pressure.The air-flow producing eddy flow and the air-flow being inhaled into described flow generator 41 can pass through described gas outlet 412 and discharge from described air outlet 45 via pipeline.From without the gas field environment in described model casing 3 is caused too much impact.
Shown in Figure 3, the distance d of the nearest tangent line in parallel of the passage of described tangential admission mouth 411 and described flow generator 41 inwall may be configured as 2-5mm, can ensure that the air-flow entered from described tangential admission mouth 411 can easily produce eddy flow, is easy to described tangential admission mouth 411 is processed on the other hand so on the one hand.
Shown in Figure 2, for the ease of the pressure that geotechnical model 2 is produced by calculated gas flow, described flow generator 41 to be parallel to described the domatic of geotechnical model 2 and be configured, that is, described flow generator 41 has an angle of inclination corresponding to the bottom of described model casing 3, in this case, in order to ensure that the cyclone gas field in described flow generator 41 to be collected to the top of described flow generator 41, shown in Figure 4, the distance H1 on described tangential admission mouth 411 and described flow generator 41 base however 1/8 of the height H less than described flow generator 41, and, the passage of described tangential admission mouth 411 and described flow generator 41 base α with an angle are the inclination angle of 3-8 degree.
Described tangential admission mouth 411 can arrange multiple, for instance, on its cross section, place, two or four can be symmetrical arranged along the center of circle.Produced by so can being guaranteed under various inlet flow condition, the center of cyclone gas field stablizes.
Shown in Figure 4, described gas outlet 412 is only used as the flow pass of vortex gas-flow, therefore it can be arranged on described flow generator 41 on the sidewall of top margin, certainly, it may also be arranged on the top margin of described flow generator 41, described gas outlet 412 place can arrange an electromagnetic valve, so, described gas outlet 412 can be closed by closing this electromagnetic valve, when described gas outlet 412 is closed, enter described flow generator 41 from tangential admission mouth 411 will be spilled over to described geotechnical model 2, thus typhoon etc. can be simulated can produce the extreme airflow condition of malleation.
Described mouth 44 of calling prisoners in after letting them out for exercise can arrange an electromagnetic valve (not shown), so can regulate intake in process of the test.
Can be measured by arranging baroceptor in described flow generator 41 and in described model casing by a kind of device for the geotechnical model test that comes down provided by the present invention produced stream pressure in centrifugal test.
A kind of device for the geotechnical model test that comes down proposed by the invention, its can at the externally-generated air-flow of geotechnical model, thus the impact on landslide of the extreme airflow condition such as typhoon, tornado can be simulated in centrifugal model test.
Although it will be appreciated by those skilled in the art that the present invention is described according to the mode of multiple embodiments, but not each embodiment only comprises an independent technical scheme.In description so narration be only used to clear for the purpose of; description should be made as a whole to be understood by those skilled in the art, and technical scheme involved in each embodiment being regarded as, the mode that can be mutually combined into different embodiment is to understand protection scope of the present invention.
The foregoing is only the schematic detailed description of the invention of the present invention, be not limited to the scope of the present invention.Any those skilled in the art, the equivalent variations made under without departing from the design of the present invention and the premise of principle, amendment and combination, the scope of protection of the invention all should be belonged to.
Claims (1)
1. a landslide building model test apparatus, it is arranged on the model casing placing geotechnical model, it is characterised in that it includes being arranged at the flow generator above described geotechnical model slope；Described flow generator is cone cylinder structure, is provided with at least one tangential admission mouth below, is provided above a gas outlet；Described flow generator is connected with described model casing by a head rod and second connecting rod, described head rod top is provided with a mouth of calling prisoners in after letting them out for exercise being positioned at described model casing top, described second connecting rod top is provided with an air outlet being positioned at described model casing top, described mouth of calling prisoners in after letting them out for exercise is horn-like structure with described air outlet, described mouth of calling prisoners in after letting them out for exercise is connected with described tangential admission mouth by pipeline, described air outlet is connected with described gas outlet by pipeline, described gas outlet is provided with electromagnetic valve, the distance on described tangential admission mouth and described flow generator base is not less than the 1/8 of the height of described flow generator, described tangential admission mouth and described flow generator base are the inclination angle of 3-8 degree with an angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322701.6A CN105784975B (en) | 2015-05-12 | 2015-05-12 | One kind landslide building model test apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322701.6A CN105784975B (en) | 2015-05-12 | 2015-05-12 | One kind landslide building model test apparatus |
| CN201510237335.XA CN104807976B (en) | 2015-05-12 | 2015-05-12 | A kind of device for the geotechnical model test that comes down |
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| CN201510237335.XA Division CN104807976B (en) | 2015-05-12 | 2015-05-12 | A kind of device for the geotechnical model test that comes down |
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| CN105784975A true CN105784975A (en) | 2016-07-20 |
| CN105784975B CN105784975B (en) | 2017-06-20 |
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| CN201610322701.6A Expired - Fee Related CN105784975B (en) | 2015-05-12 | 2015-05-12 | One kind landslide building model test apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337646A (en) * | 2020-02-24 | 2020-06-26 | 同济大学 | Dam break type mudstone flow dynamics evolution overall process simulation test system |
Citations (5)
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| US20070084268A1 (en) * | 2004-12-08 | 2007-04-19 | Board Of Regents, The University Of Texas System | Centrifuge permeameter for unsaturated soils system |
| CN102297834A (en) * | 2011-05-27 | 2011-12-28 | 浙江大学 | Dry-wet circulation climate hypergravity simulation system |
| CN103234733A (en) * | 2013-05-07 | 2013-08-07 | 清华大学 | Giant maritime work centrifugal machine |
| CN103267651A (en) * | 2013-05-07 | 2013-08-28 | 清华大学 | High-gravity field wind generation device for giant maritime work centrifuge |
| CN203572758U (en) * | 2013-10-30 | 2014-04-30 | 西南交通大学 | Shear rheology device for researching gas trapping rheological property of long-runout landslides |
-
2015
- 2015-05-12 CN CN201610322701.6A patent/CN105784975B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070084268A1 (en) * | 2004-12-08 | 2007-04-19 | Board Of Regents, The University Of Texas System | Centrifuge permeameter for unsaturated soils system |
| CN102297834A (en) * | 2011-05-27 | 2011-12-28 | 浙江大学 | Dry-wet circulation climate hypergravity simulation system |
| CN103234733A (en) * | 2013-05-07 | 2013-08-07 | 清华大学 | Giant maritime work centrifugal machine |
| CN103267651A (en) * | 2013-05-07 | 2013-08-28 | 清华大学 | High-gravity field wind generation device for giant maritime work centrifuge |
| CN203572758U (en) * | 2013-10-30 | 2014-04-30 | 西南交通大学 | Shear rheology device for researching gas trapping rheological property of long-runout landslides |
Non-Patent Citations (2)
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| 孔维伟 等: "台风滑坡变形破坏机制模型试验研究", 《工程地质学报》 * |
| 王照财 等: "台风作用下植被对斜坡稳定性影", 《自 然 灾 害 学 报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337646A (en) * | 2020-02-24 | 2020-06-26 | 同济大学 | Dam break type mudstone flow dynamics evolution overall process simulation test system |
| CN111337646B (en) * | 2020-02-24 | 2021-10-08 | 同济大学 | Dam break type mudstone flow dynamics evolution overall process simulation test system |
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| CN105784975B (en) | 2017-06-20 |
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