CN209280713U - Simulate the experimental provision of constructing tunnel drift-sand stratum Progressive failure - Google Patents
Simulate the experimental provision of constructing tunnel drift-sand stratum Progressive failure Download PDFInfo
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- CN209280713U CN209280713U CN201821991150.3U CN201821991150U CN209280713U CN 209280713 U CN209280713 U CN 209280713U CN 201821991150 U CN201821991150 U CN 201821991150U CN 209280713 U CN209280713 U CN 209280713U
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- drift
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Abstract
The utility model discloses a kind of experimental provision for simulating constructing tunnel drift-sand stratum Progressive failure, and device includes the transparent gentle mould of model cabinet, and the reserved Tunnel-hole through cabinet antetheca and rear wall is equipped in the middle part of model cabinet；Gas mould is column, and size is identical as model tunnel, and end is equipped with the air valve for inflation/deflation, and is laterally arranged in model cabinet by reserved Tunnel-hole；Its complementary space is filled with the cast material for closely surrounding the simulation drift-sand stratum of gas mould in model casing body, and the cast material is particulate matter of the cohesive strength of layer dyeing close to zero；The external face of model casing is reserved and sets camera at Tunnel-hole, has for being recorded in the process that cast material changes after gas mould is deflated rapidly.The utility model simulates wind-blown sand tunnel with gas mould, can once realize the excavation in simulation tunnel；Different colors is dyed into cast material layering, it, can accurate, complete analysis model country rock Progressive failure rule with the process of cameras record model country rock Progressive failure.
Description
Technical field
The utility model relates to tunnels and underground engineering technical fields, specially a kind of simulation constructing tunnel drift-sand stratum
The experimental provision of Progressive failure.
Background technique
Drift-sand refers to that gravel deposits the sand dune to be formed through eolian transportation, and drift-sand engineering characteristic is different from the general soil body,
Its is loosely organized, water penetration is strong, moisture content is low, cohesive strength is small, self-stable ability is poor, particle is mostly host mineral etc., and part is husky
Mound has mobility, and according to similarity law, in the model experiment of simulation drift-sand Progressive failure, the material of selection is in cohesive strength
On it is also smaller than prototype drift-sand, and the cohesive strength of actually drift-sand is close to zero, so the cohesive strength of cast material will be more
Close to zero, thus will appear following point: drift-sand can collapse immediately after excavation, influence the excavation of subsequent face, have
For fear of continuing for experiment.
In addition to this, drift-sand grain diameter is small, and structure loosely, after wind-blown sand tunnel excavates, is disturbed since country rock receives
Dynamic, country rock can quickly collapse according to certain rule, and human eye is unable to complete documentation for fast-changing collapsing process.When
When carrying out model experiment, will also similar problem occur, thus only cannot depict its destructive process by naked eyes.Meanwhile aeolian accumulation
Grains of sand diameter is more concentrated, and its property, ingredient are also similar.And in vertical direction without apparent grain diameter difference, this
It is difficult to sentence the change in location process after drift-sand is subjected to displacement out, with model experiment simulation drift-sand gradual destruction mechanism
In experiment, we are not only it is to be understood that the size of drift-sand shift value, it will also be appreciated that becoming after the variation of drift-sand particle displacement with displacement
Relativeness before change.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of engineering characteristics that can be used in studying drift-sand
Simulation constructing tunnel drift-sand stratum Progressive failure experimental provision.Technical solution is as follows:
A kind of experimental provision for simulating constructing tunnel drift-sand stratum Progressive failure, it is gentle including transparent model cabinet
Mould, the model cabinet middle part are equipped with the reserved Tunnel-hole through cabinet antetheca and rear wall；The gas mould is column, size and mould
Type tunnel is identical, and end is equipped with the air valve for inflation/deflation, and is laterally arranged in model cabinet by reserved Tunnel-hole；Model
Its complementary space is filled with the cast material for closely surrounding the simulation drift-sand stratum of gas mould in cabinet, and the cast material is layering
Particulate matter of the cohesive strength of dyeing close to zero；The external face of model casing is reserved and sets camera at Tunnel-hole, has for recording
The process that cast material changes after gas mould is deflated rapidly.
Further, the model cabinet includes cabinet steelframe, and four wall of model cabinet is the glass being fixed on cabinet steelframe
Glass plate.
The beneficial effects of the utility model are: the utility model simulates wind-blown sand tunnel with gas mould, mould can be once realized
The excavation in quasi- tunnel, is presented the influence that face caves in or vault roof fall problem excavates subsequent tunnel；Camera is used simultaneously
The process of record cast country rock Progressive failure, such that experimenter is accurate, rule of complete analysis model country rock Progressive failure；
Model country rock layers of material is dyed into different colors, before and after being conducive to experimenter's intuitive judgment model country rock Progressive failure
Positional relationship.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the experimental provision that the utility model simulates constructing tunnel drift-sand stratum Progressive failure.
Fig. 2 is the longitudinal direction for the experimental provision model cabinet that the utility model simulates constructing tunnel drift-sand stratum Progressive failure
Sectional view.
Fig. 3 is the transverse direction for the experimental provision model cabinet that the utility model simulates constructing tunnel drift-sand stratum Progressive failure
Sectional view.
Fig. 4 is the structural representation for the experimental provision gas mould that the utility model simulates constructing tunnel drift-sand stratum Progressive failure
Figure；(a) gas mould right view, (b) gas mould main view.
In figure: 1- gas mould；2- camera；3- cast material；4- cabinet steelframe；5- air valve；6- glass plate；7- reserves tunnel
Hole.
Specific embodiment
The utility model is described in further details in the following with reference to the drawings and specific embodiments.The experiment of the utility model
Device is used to study the engineering characteristic of drift-sand, and during model experiment, good and mould will be customized in advance according to tunnel size
The gas mould of the identical size in type tunnel can undertake certain pressure from surrounding rock with cycle charge discharge gas, gas mould and have no obvious deformation, simultaneously
Also it can deflate rapidly, for simulating the excavation of tunnel surrounding；Using slr camera, can be clapped during model Change in surrounding rocks
8 out/high definition picture per second, the deformation process of country rock is simulated using sequence of pictures energy complete observation；Use coloured dye
Cast material is dyed, its most obvious, most basic changing rule can be visually observed out during model Change in surrounding rocks
The relativeness before and after Change in surrounding rocks occurs with cast material.
As shown in Figure 1-3, the experimental provision of simulation constructing tunnel drift-sand stratum Progressive failure includes transparent model casing
The gentle mould 1 of body, the model cabinet middle part are equipped with the reserved Tunnel-hole 7 through cabinet antetheca and rear wall；As shown in figure 4, described
Gas mould 1 is column, and size is identical as model tunnel, and end is equipped with the air valve 5 for inflation/deflation, and horizontal by reserved Tunnel-hole 7
To being arranged in model cabinet；Its complementary space is filled with the mould for closely surrounding the simulation drift-sand stratum of gas mould 1 in model casing body
Profile material 3, the cast material 3 are particulate matter of the cohesive strength of layer dyeing close to zero；The external face of model casing is pre-
It stays and sets camera 2 at Tunnel-hole 7, have for being recorded in the process that cast material 3 changes after gas mould 1 is deflated rapidly.Wherein, model casing
Body includes cabinet steelframe 4, and four wall of model cabinet is the glass plate 6 being fixed on cabinet steelframe 4.
Model tunnel is simulated with gas mould, and gas mould inflation/deflation has Air Valve Control, and gas mould tamps design in the layering of model country rock
Inflation is put into when position, and air pressure is not less than earthing weight stress on country rock, to guarantee that it will not occur before model tunnel excavation again
Obvious deformation.When needing tunneling, gas mould is deflated, gas mould can freely become after deflating under the action of model pressure from surrounding rock
Shape does not influence the stress of country rock；Meanwhile camera will be placed in tunnel model front, and regulate acquisition parameters, it can be complete
The overall process that complete record model country rock changes after tunnel excavation, so as to the rule of post analysis model Change in surrounding rocks.
Cast material is done close to zero particulate matter with cohesive strength, simulates drift-sand country rock.Determining country rock model material
After material, country rock is dyed to different colors with ink, sunning is stood after dyeing and is volatilized completely to moisture, to exclude coloring material water
Divide the influence to model country rock material cohesive strength, is then layered again and the material is put into model casing and is compacted to certain density.
Model cabinet is made of fashioned iron and organic glass, in order to the change procedure of experimenter's observing and nursing country rock.It crosses
Cheng Qian's certain distance before model casing installs a camera, during the experiment the change in displacement mistake of whole record cast country rock
Journey.Cast material dyes different colours with dyestuff, and layering inserts model casing and is densified to design density after sunning, and cast material exists
The color selection of adjacent two layers is upper should be convenient for distinguishing, and should stand after being completely filled with country rock and can be tested for a period of time.
Experimentation is as follows:
Step 1: cohesive strength is chosen close to zero particulate matter as cast material, and is divided into several pieces, every part of dye
Upper different color stands sunning and volatilizees completely to moisture；
Step 2: the cast material after drying is packed into model casing body by color layering and reserves Tunnel-hole position below,
And it is compacted；
Step 3: after the inflation of gas mould, being placed in reserved Tunnel-hole；
Step 4: continuing that cast material is packed into model casing body to preset position by color layering；
Step 5: opening air valve, gas mould is deflated；The cast material filled by color layering is continuously shot with camera simultaneously
Change procedure.
Claims (2)
1. a kind of experimental provision for simulating constructing tunnel drift-sand stratum Progressive failure, which is characterized in that including transparent model
The gentle mould of cabinet (1), the model cabinet middle part are equipped with the reserved Tunnel-hole (7) through cabinet antetheca and rear wall；The gas mould
It (1) is column, size is identical as model tunnel, and end is equipped with the air valve (5) for inflation/deflation, and by reserving Tunnel-hole (7)
Laterally it is arranged in model cabinet；Its complementary space is filled with the simulation drift-sand stratum for closely surrounding gas mould (1) in model casing body
Cast material (3), the cast material (3) is particulate matter of the cohesive strength of layer dyeing close to zero；The model cabinet
Outer face, which is reserved, sets camera (2) at Tunnel-hole (7), have for being recorded in cast material (3) variation after gas mould (1) is deflated rapidly
Process.
2. the experimental provision of simulation constructing tunnel drift-sand stratum Progressive failure according to claim 1, which is characterized in that
The model cabinet includes cabinet steelframe (4), and four wall of model cabinet is the glass plate (6) being fixed on cabinet steelframe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821991150.3U CN209280713U (en) | 2018-11-30 | 2018-11-30 | Simulate the experimental provision of constructing tunnel drift-sand stratum Progressive failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821991150.3U CN209280713U (en) | 2018-11-30 | 2018-11-30 | Simulate the experimental provision of constructing tunnel drift-sand stratum Progressive failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209280713U true CN209280713U (en) | 2019-08-20 |
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ID=67609271
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821991150.3U Expired - Fee Related CN209280713U (en) | 2018-11-30 | 2018-11-30 | Simulate the experimental provision of constructing tunnel drift-sand stratum Progressive failure |
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| Country | Link |
|---|---|
| CN (1) | CN209280713U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374864A (en) * | 2018-11-30 | 2019-02-22 | 西南交通大学 | Simulate the experimental provision and experimental method of constructing tunnel drift-sand stratum Progressive failure |
-
2018
- 2018-11-30 CN CN201821991150.3U patent/CN209280713U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374864A (en) * | 2018-11-30 | 2019-02-22 | 西南交通大学 | Simulate the experimental provision and experimental method of constructing tunnel drift-sand stratum Progressive failure |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20190820 Termination date: 20201130 |