CN108181173A - It can be with the test model of simulative immersion embankment - Google Patents
It can be with the test model of simulative immersion embankment Download PDFInfo
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- CN108181173A CN108181173A CN201810098594.2A CN201810098594A CN108181173A CN 108181173 A CN108181173 A CN 108181173A CN 201810098594 A CN201810098594 A CN 201810098594A CN 108181173 A CN108181173 A CN 108181173A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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Abstract
The present invention relates to it is a kind of can be with the test model of simulative immersion embankment, including accommodate for simulate embankment the soil body model casing (10), water tank and static force loading device, static force loading device is used to apply pressure to simulation embankment, water tank is two, first water tank (3) and the second water tank (4) are connected respectively by the first water check valve (6) and the second water check valve (7) with the both sides of model casing (10), for implementing to soak to the simulation embankment of corresponding side；First water tank (3) and the second water tank (4) are seal case, and the upper cavity of the two is connected respectively with the first expansion box (13), the second expansion box (14) gas circuit；First expansion box (13) is connected by the first valve positioner with air compressor, and the second expansion box (14) is connected by the second valve positioner with air compressor, realizes that the water filling to model casing both sides controls by adjusting gas pressure.
Description
Technical field
The present invention relates to it is a kind of can be with the test model of simulative immersion embankment.
Background technology
In recent years, input of the country in terms of infrastructure is huge, and the investment construction in terms of highway is especially prominent.According to
《National highway network planning draws (2013-2030)》, the road network gross investment newly planned reaches 4.7 trillion yuans.It is big with highway construction
Scale carry out, engineering construction pass through area topographic and geologic condition become increasingly complex, including Plain rolling terrain, Freeway of Mountain Range,
Coastal Soft Soil Area, Coastal Area etc..Under these geological conditions, highway embankment will inevitably be corroded by flow,
Including tidal water at hills area intermountain gully water, rainwater, Lake Water and tidal-flat area etc..It is this to be built along rivers,lakes and seas,
It may be known as immerseable embankment by the embankment that one or both sides are soaked.
Immerseable embankment is also acted in addition to dead weight and Driving Loading is born by water buoyancy and flowing pressure.
Embankment is for a long time by embankment at the infringement and coastal waters beach soaked repeatedly caused by rain erosion and the change of level of ground water condition
It is washed away by the periodicity of tide seawater under the conditions of the impact of intermountain streams water etc., the strength softening that bankets of immerseable embankment is held
Loading capability deteriorates, and fine filler is largely lost in embankment, generates larger sedimentation and deformation and lateral deformation, and de-stabilise occurs for embankment
It destroys.Finally, it influences traffic safety even to suspend traffic, causes life and property loss.Therefore, to the stability of immerseable embankment,
Deformation and behaviors of settlement are analyzed, it has also become the major issue of engineering construction and field of scientific study urgent need to resolve.
At present, the research work of immerseable embankment can substantially be divided into three aspect theoretical researches, experimental study and numerical value
Simulation.Since the stressing conditions of immerseable embankment are more complicated, other than conducting oneself with dignity with traffic load, also by water buoyancy and dynamic water
The effect of pressure, therefore, the theoretical research factor needed to be considered of immerseable embankment is more, and derivation is relatively complicated, and formula is non-
Often complicated and applicable elements are more harsh, are unfavorable for being promoted and applied in engineering practice；Field test cost is higher, controllably
Factor is less, and research variable is difficult to control, and cannot repeat to test, and is often rarely employed；And if individually carrying out numerical value
Simulation, result generally cannot be convincing, needs to be used in combination with other research methods, can only be used as a kind of supplementary means；
Indoor model test, can preferably simulate embankment immersion situation, study various variables to embankment deformation and stability influence,
And cost is very low compared with field test, is a kind of method of the deformation and stability of good research immerseable embankment.
There are many deficiencies for laboratory test model in relation to immerseable embankment.Most of experiments use half of embankment model, very
System-wide dike model is used less.Laboratory test mainly studies the factors such as depth of fill, the gradient, Penetration Signature and immersion height and satisfies the need
The deformation of dike and the influence of stability, less influence of the kinetic factor to immerseable embankment for considering embankment immersion speed, water.In mould
In type experimental design to embankment immersion height division it is very coarse, typically just study embankment do not soak, high water level, low water level three
Kind situation；The definition of wherein water level height is by virtue of experience determining, in relation to immersion height to embankment deformation and stability influence
Research is not careful enough.In addition, most of in model test consider embankment unilateral side immersion situation, rarely have experiment to carry out embankment bilateral
Immersion research.In test model to that in the simulation of embankment immersion and draining, can not realize that embankment both sides difference water level height satisfies the need
Dike and the influence of deformation, every time experiment are required for the water filling into model casing, make test procedure relatively complicated, and waste water resource,
In addition to this, most model tests can not influence of the dynamic analog flux and reflux to embankment.
For the above problem of immerseable embankment laboratory test model, there is an urgent need for being improved to existing test model, fully examine
It is deformed many factors of worry embankment immersion and the influence of stability, simplify the realization method of embankment immersion, so as to design
A kind of repeatable indoor model test method of intuitive practicality, one kind is provided simply for immerseable embankment deformation and the research of stability
The analysis method of practical low cost.Therefore, the present invention designs a kind of laboratory test model that can repeat simulative immersion embankment.
Invention content
Can be with the experimental rig of simulative immersion embankment in view of the above-mentioned problems, present invention design is a kind of, studying influences embankment
Deformation and the factors of stability, design and construction for immerseable embankment provide theoretical direction.Technical solution is as follows：
It is a kind of can with the test model of simulative immersion embankment, including accommodate for simulate embankment the soil body model casing 10,
Water tank and static force loading device, static force loading device are used to apply pressure to simulation embankment, which is characterized in that the water tank
For two i.e. the first water tank 3 and the second water tank 4, the first water tank 3 and the second water tank 4 pass through the first water check valve 6 respectively
It is connected with the second water check valve 7 with the both sides of model casing 10, for implementing to soak to the simulation embankment of corresponding side；First storage
3 and second water tank 4 of water tank is seal case, the upper cavity of the two respectively with the first expansion box 13,14 gas of the second expansion box
Road is connected；First expansion box 13 is connected by the first valve positioner with air compressor, and the second expansion box 14 passes through the second valve
Door controller is connected with air compressor, realizes that the water filling to model casing both sides controls by adjusting gas pressure.
Preferably, pore pressure meter is distributed in the inside of simulation embankment, displacement meter is distributed in surface.
The upper cavity of two water tanks is both provided with gas gauge.
The present invention studies immerseable embankment laboratory test model and opens up new approach for construction and R＆D institution.The present invention exists
The advantages of the following aspects：
(1) new thinking is provided for scientific research.The immersion of embankment unilateral side and bilateral can be simulated with water level and high-low water level
Three kinds of situations of immersion, the deformation of embankment and stability and immersed depth under the conditions of research immersion, immersion speed, depth of fill,
The gradient and embankment whether there is the relationship between reinforcement etc..Experiment can accurately control embankment immersion height, and convenient and efficient simulation is not
The deformation soaked with embankment under operating mode and stability characteristic (quality).
(2) model test cost is relatively low.In this experiment required instrument be in laboratory common instrument, cost it is relatively low.With
Field test is compared, this model cost advantage is apparent.
(3) test operation is simple.The assembling of this test model Instrumental is very convenient, and test operation step is simple, simulation leaching
Canal embankment is more convenient.
(4) experiment influence factor is controllable.Compared to field test, indoor model test can be according to research variable not
Together, various experimental conditions are controlled, reach research purpose.
Description of the drawings
Fig. 1 test models
Fig. 2 sensor placement figures.
Figure label explanation：1 valve positioner a；2 valve positioner b；3 water tank a；4 water tank b；5 water check valve a；6 stop
Water valve b；7 hoses；8 fine grained soils；9 coarse-grained soils；10 model casings；11 pore pressure meters；12 displacement meters；13 air storage chamber a；14 air storage chamber b.
Specific embodiment
The present invention will be described with embodiment below in conjunction with the accompanying drawings.
The present invention is a kind of novel immerseable embankment test model layout drawing, using pressure equilibrium principle in physics, is passed through
Air pressure size and water check valve valve size carry out dynamic analog embankment by tiding to embankment deformation and stabilization in adjustment water tank
The influence situation of property.Referring to Fig. 1, the present invention provides a kind of laboratory testing rig that can simulate embankment difference immersion situation, examination
Experiment device connection includes air pressure flood pattern and model casing system.Air pressure flood pattern is by air compressor, air storage chamber a 13, storage
Gas chamber a 14, valve positioner a 1, valve positioner b 2, water tank a 13 and water tank b 14 are formed；Model casing system
The embankment model and static force loading device three parts built by model casing 10, coarse-grained soil 9 and 8 heap of fine grained soil form.
It is sequentially placed into model casing 10 by coarse-grained soil 9 and fine grained soil 8, forms embankment model, heap, which is built the road, to exist during dike
Embedding pore pressure meter 11 inside embankment, in embankment surface layout displacement meter 12, (pore pressure meter 11, displacement meter 12 are specifically arranged such as Fig. 2 institutes
Show)；After the completion of embankment heap is built, static force loading device is set up on it, completes the connection of model casing system.
Inside air pressure flood pattern, 3 tops of water tank a are connected with 13 tops of air storage chamber a by hose, water tank b
4 tops are connected with 14 tops of air storage chamber b using hose.Water tank side wall marks scale and is used for reading into and out of water, and
Setting pressure gauge at the top of water tank, for monitoring pressure in water tank.Utilize 13 bottoms of hose left end connection air storage chamber a, right end
14 bottoms of air storage chamber b are connected, hose is respectively arranged on the left side and the right side valve positioner a 1, valve positioner b 2, valve positioner
It is connected with computer, meanwhile, valve positioner is connected by hose with air compressor.
10 left side of model casing is connected with water tank a 3 using the hose with water check valve a 5.10 right side of model casing and storage
Water tank b 4 is connected by carrying the hose of water check valve 6, the connection of the gentle pressure injection water system of implementation model case system, is completed entire
Experimental rig connects.
The present invention can simulate the immersion of embankment unilateral side and bilateral two kinds of situations of immersion, and wherein bilateral immersion has embankment both sides water
The identical and water level different situations in position.Tests below step will introduce the immersion of embankment unilateral side respectively and two kinds of situations of bilateral immersion are (double
Side immersion illustrates so that embankment both sides water level is equal, and test procedure is identical during the water level difference of both sides, only need to change two water tanks
Middle relative water content).
Embankment unilateral side submerging test test procedure embodiment：
(1) the gentle pressure injection water system of link model case system, check device air-tightness；
(2) the embankment model being made of coarse-grained soil 9 and fine grained soil 8 is put into model casing 10, is buried in advance by test requirements document
Measuring instrument pore pressure meter 11 and displacement meter 12 are put, and static force loading device is set on embankment；
(3) the water V of appropriate volume is added in water tank a 31, not water filling in water tank b 4.
(4) start air compressor, utilize computer regulated valve positioner a 1；And left pressure table is observed, treat pressure
Water check valve a 5 is opened when appropriate；
(5) control valve controller a 5 makes the water in water tank a 3 slowly enter in model casing；Open water check valve b 6；
(6) when water fully enters model casing in water tank a 3, left pressure meter reading is observed, keeps air storage chamber a 13
Interior stable gas pressure；
(7) after stable level on the left of embankment, certain time t is kept, to simulate the situation of embankment unilateral side immersion；
(8) after time t, air compressor is closed, the opening degree of valve positioner 1 is adjusted by computer, controls mould
The water level decreasing speed of molding box 10 observes embankment physical index situation of change during water level raising and lowering；
(9) 4-8 steps are repeated, and number of repetition is completed according to test requirements document；
(10) reading V in water tank a 13 and water tank b 14 is read2、V3；
(11) experiment finishes, and cuts off the power, cleans each test apparatus and set back.
The submerging test of embankment bilateral (by taking both sides water level is identical as an example) test procedure embodiment：
(1) the gentle pressure injection water system of link model case system, check device air-tightness；
(2) the embankment model being made of coarse-grained soil 9 and fine grained soil 8 is put into model casing 10, is buried in advance by test requirements document
Measuring instrument pore pressure meter 11 and displacement meter 12 are put, and static force loading device is placed on embankment；
(3) water of appropriate volume is added in water tank a 3 and water tank b 4；
(4) start air compressor, control valve controller a 1 and valve positioner b 2；And pressure at both sides table is observed,
Water check valve a 5 and water check valve b 6 is opened when air pressure is appropriate；
(5) made in water tank a 3 and water tank b 4 using computer regulated valve positioner a 1 and valve positioner b 2
Water slowly enter in model casing；
(6) when water fully enters model casing in water tank a 3 and water tank b 4, air storage chamber a 13 and air storage chamber b is kept
Stable gas pressure in 14, and make embankment both sides water level identical；
(7) it keeps embankment both sides water level constant, after certain time t, closes air compressor, valve is adjusted by computer
The opening degree of controller 1 and valve positioner 2,10 both sides water level decreasing speed of Controlling model case, observation water level rise and under
Embankment physical index situation of change situation during drop；
(8) 4-7 steps are repeated, and number of repetition is completed according to test requirements document.
(9) experiment finishes, and cuts off the power, cleans each test apparatus and set back.
Claims (3)
1. it is a kind of can with the test model of simulative immersion embankment, including accommodate for simulate embankment the soil body model casing (10),
Water tank and static force loading device, static force loading device are used to apply pressure to simulation embankment, which is characterized in that the water tank
For two i.e. the first water tank (3) and the second water tank (4), the first water tank (3) and the second water tank (4) pass through first respectively
Water check valve (6) and the second water check valve (7) are connected with the both sides of model casing (10), for implementing to soak to the simulation embankment of corresponding side
Water；First water tank (3) and the second water tank (4) are seal case, the upper cavity of the two respectively with the first gas storage
Case (13), the second expansion box (14) gas circuit are connected；First expansion box (13) passes through the first valve positioner and air compressor phase
Even, the second expansion box (14) is connected by the second valve positioner with air compressor, is realized by adjusting gas pressure to mould
The water filling control of molding box both sides.
2. test model according to claim 1, which is characterized in that pore pressure meter, table is distributed in the inside of simulation embankment
EDS maps have displacement meter.
3. test model according to claim 1, which is characterized in that the upper cavity of two water tanks is both provided with gas
Pressure gauge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810098594.2A CN108181173A (en) | 2018-01-31 | 2018-01-31 | It can be with the test model of simulative immersion embankment |
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| CN201810098594.2A CN108181173A (en) | 2018-01-31 | 2018-01-31 | It can be with the test model of simulative immersion embankment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709757A (en) * | 2018-06-21 | 2018-10-26 | 江苏远致达轨道交通发展有限公司 | A kind of rail traffic detection device |
| CN110133214A (en) * | 2019-05-15 | 2019-08-16 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of experimental rig for the cold area's canal for water conveyance fluctuation in stage of centrifugal field Imitating |
| CN112709266A (en) * | 2020-12-18 | 2021-04-27 | 武汉理工大学 | Test system and method for simulating coral reef sand bearing capacity in tidal environment |
| CN114839352A (en) * | 2022-05-25 | 2022-08-02 | 聊城大学 | Model test device for simulating stability of submerged roadbed |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709757A (en) * | 2018-06-21 | 2018-10-26 | 江苏远致达轨道交通发展有限公司 | A kind of rail traffic detection device |
| CN110133214A (en) * | 2019-05-15 | 2019-08-16 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of experimental rig for the cold area's canal for water conveyance fluctuation in stage of centrifugal field Imitating |
| CN110133214B (en) * | 2019-05-15 | 2021-07-13 | 水利部交通运输部国家能源局南京水利科学研究院 | Test device for simulating water level rise and fall of cold region water delivery channel under centrifugal field |
| CN112709266A (en) * | 2020-12-18 | 2021-04-27 | 武汉理工大学 | Test system and method for simulating coral reef sand bearing capacity in tidal environment |
| CN114839352A (en) * | 2022-05-25 | 2022-08-02 | 聊城大学 | Model test device for simulating stability of submerged roadbed |
| CN114839352B (en) * | 2022-05-25 | 2024-02-06 | 聊城大学 | Model test device for simulating stability of immersed roadbed |
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