CN108267370A - A kind of one-dimensional cylinder test device and method for simulating the kinetic head boundary effect soil body - Google Patents
A kind of one-dimensional cylinder test device and method for simulating the kinetic head boundary effect soil body Download PDFInfo
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- CN108267370A CN108267370A CN201810099186.9A CN201810099186A CN108267370A CN 108267370 A CN108267370 A CN 108267370A CN 201810099186 A CN201810099186 A CN 201810099186A CN 108267370 A CN108267370 A CN 108267370A
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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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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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- 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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0266—Cylindrical specimens
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Abstract
The invention discloses a kind of one-dimensional cylinder test device and method for simulating the kinetic head boundary effect soil body, which includes main body cylinder, GDS standard controllers, plexiglass cylinder device, data collecting instrument；Main body cylinder includes sequentially connected section top cylinder, several section middle cylinders, a section bottom barrel and trolley from top to bottom；The different height upper installing hole gap water pressure gauge fixing device of main body cylinder；The bottom of bottom barrel is connect respectively with GDS standard controllers and plexiglass cylinder device；The present invention can in ground foundation simulation artesian water dynamic changing process；The Water And Earth Pressures for calculating the lower ground of dynamic artesian water effect and deformation are measured, the problems such as arranging correlation test data and determine ground stress and development of deformation rule；The influence of the amplitude and rate of the variation of dynamic artesian water to foundation stability is sought, ground Study on Problems caused by being acted on for dynamic artesian water provides effective test data and supports, and provides foundation for theoretical analysis model later.
Description
Technical field
The present invention relates to a kind of foundation model experimental rigs more particularly to a kind of kinetic head boundary of simulating to act on the soil body
One-dimensional cylinder test device and method, can in simulate confined water regime variation when the weak water penetration foundation soil body of overlying response feelings
Condition, the failure condition and failure mode of the lower ground of research trends artesian water effect.
Background technology
China has a vast territory, and water resource is enriched, and groundwater occurrence is extensive, especially in coastal riverine region, along with soil
The complex distributions of layer, often there is have the phenomenon that artesian water below aquiclude.Flood peak passes by, tidal action, large-scale rainfall,
The artesian head dynamic change that will lead to aquiclude bottom using pressure reduction well etc. in engineering, so as to further influence aquiclude
In Water And Earth Pressures, deformation and stabilization.In engineering construction in such area, such as slope project, the foundation pit in aquiclude
Excavation, shield driving etc., the effect of dynamic artesian water often influence the distribution of Water And Earth Pressures in Engineering Zone, and then to engineering
Construction brings risk.
Practical Project comprising numerous factors, supervise in real time by the Water And Earth Pressures in the aquiclude influenced by dynamic artesian water
Survey is often difficult to.In addition, hydrologic condition is ever-changing in engineering, it is desirable to carry out statistical by a large amount of measured datas
Analysis, and then sum up the universal law and not of the response of water and soil in the aquiclude influenced by dynamic artesian water and foundation deformation
Reality；In current existing research means, numerical software simulation and economics analysis are more convenient, but both methods is being ground
Generally first it need to assume a kind of constitutive model for foundation soil when studying carefully.Therefore, the water in the soil body caused by confined water regime variation is calculated
When soil pressure and deformation, as a result whether the credible constitutive model for being largely dependent on the soil body is reasonable and calculating parameter
Specific value.
Compared with parsing with numerical method, model test can overcome above-mentioned shortcomings.Geotechnical model under the conditions of 1g
Experiment can easily apply stablize, the boundary condition of rule, without assuming constitutive relation, can directly observation experiment phenomenon and obtain
Obtain data.In addition, the normal gravity environment under 1g model experiments will not destroy soil structures, the size of soil particle and mutual
Interactively is identical with actual formation, and the interaction between aquiclude bottom soil particle and its underpart artesian water can also
Really simulated.Therefore, 1g model experiments are widely used among the microexamination of the soil body.
At present, in the existing and relevant 1g experimental studies of dynamic artesian water, most of research is the three of drawdown ratio ruler
Dimension module experimental study, the experimental study of soil unit is almost blank.Scale (model) test under geotechnological monomer scale is often
Local place behavior in different Practical Projects is simulated, such as excavation of foundation pit, tunnel excavation.These scale (model) tests
Pore pressure distribution, deformation rule, geostatic shield and structural internal force in entire test area etc. is often paid close attention to, so as to reality
Certain critical values in the engineering of border are predicted, are simulated, but can not disclose the inherent law under these the apparent phenomenons, to new
This structure, computational theory foundation without too big use.It is corresponding to be, using triaxial test as the soil unit of representative
Experiment is then intended to solve the problem above-mentioned, more to pay close attention to the various constitutive relations of the soil bodys in itself, with the relevant section of artesian water
It learns in research, how artesian pressure is propagated then in the soil body as the critical issue in soil unit research.
On the other hand, a large amount of soil tests at present generally increase artesian pressure classification when simulating artesian water variation
Or reduce, pressure values at different levels are discrete, therefore can not achieve artesian water and continuously dynamically change, with pressure-bearing true in engineering
Water variation pattern has notable difference, and influence of the artesian water rate of change to parameters such as Water And Earth Pressures in the soil body can not also obtain
Research；In addition, the most models experiment in the field is studied using the model casing of rectangular cross section, rectangular cross section model casing
Four angles may cause earth stress at this, the mutation deformed, so as to be interfered to experiment；In addition, gassy water is passed through the soil body
After the soil body is made to become unsaturated soil, it is existing often not consider this problem with the relevant experimental study of artesian water, by the soil body by
Solid, liquid, gas composition three-phase material is reduced to the two-phase substance of only solid and liquid, influence quilt of the air in soil body to soil body character
Ignore.
Invention content
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of kinetic head boundaries of simulating to act on the soil body
One-dimensional cylinder test device and method obtains what is influenced by bottom dynamic artesian water by designing one-dimensional soil unit model test
Water And Earth Pressures in aquiclude, and response of the aquiclude under the effect of bottom dynamic artesian water is disclosed according to result of the test and is advised
Rule, learns the pattern that pore pressure is propagated in the soil body, and Rule Summary simultaneously and then is applied among engineering calculation.For many engineering constructions
In certain large area region, can be reduced to one-dimensional foundation model with application the model caused by research into
Fruit such as the hole bottom central area of large-scale excavation, far field of tunneling etc., and is solved with GDS experimental rigs in experiment
The problem of modelling of the continuous dynamic change of soil body lower part artesian water.
Soil unit is taken as under cylindrical inspiration in by basic soil test, by the way that model section is arranged to
Circle solves the problems, such as earth stress caused by four angular positions of rectangular cross section model casing test in the past in, deformation mutation.
When confined water regime variation effect is arranged at the aquiclude lower part that the device can be used in one-dimensional ground, the water and soil pressure in the soil body is measured
Power size observes ground deformation, and experimental data and one-dimensional theory analytic method is compared, and deepens the research in this field
Work.
The technical solution adopted by the present invention to solve the technical problems is：A kind of kinetic head boundary of simulating acts on the soil body
One-dimensional cylinder test device, the device include main body cylinder, GDS standard controllers, plexiglass cylinder device and data acquisition
Four parts of instrument；
The main body cylinder includes sequentially connected section top cylinder, several section middle cylinders, a section bottom from top to bottom
Portion's cylinder and trolley；The top cylinder, middle cylinder and bottom barrel are made of organic glass, can facilitate in observation experiment
The deformation of the soil body；Outlet valve is installed, the outlet valve bottom flushes with experiment soil body top surface, tests on the top cylinder barrel
Outlet valve is stayed open so as to timely draining in the process so that water level line is kept constant in the experiment soil body；
The different height upper installing hole gap water pressure gauge fixing device of the top cylinder, middle cylinder and bottom barrel,
For measuring the pore water pressure size of fixed position；The pore pressure gauge fixing device by bolt, organic glass square toes,
Pore pressure gauge forms；The bolt and pore pressure gauge are described by being threadably mounted on the organic glass square toes
Organic glass square toes are connected by permeable stone and glass cement with top cylinder, middle cylinder and bottom barrel respectively；The hole
Gap water pressure gauge is connect with the data collecting instrument, can acquire confined water regime water pressure delta data；
Installation waterproof rubber ring among two adjacent pitch circle cylinders of the main body cylinder prevents that leak occurs during experiment；
The bottom barrel is by plexiglass cylinder unit, permeable stone, organic glass pillar, the first water flowing valve, second
Water flowing valve is formed；The organic glass short column is fixed on the bottom of the plexiglass cylinder unit, the permeable stone installation
Above the organic glass short column, ensure soil body saturation uniformly, fully；The plexiglass cylinder unit bottom side installation
There is the first water flowing valve for connecting the plexiglass cylinder device, the soil body in saturation main body cylinder, opposite side is equipped with
Second water flowing valve is used to connect the GDS standard controllers；The GDS standard controllers can control main body bottom of cylinder
Artesian head.
Further, the top bottom of cylinder inner wall has screw thread, for splicing with the middle cylinder；The middle circle
The inner wall of cylinder top and bottom contains screw thread, for being connected with upper and lower two pitch circles cylinder.
Further, the second water flowing valve is two-part with that will connect this with pressure ring on the GDS standard controllers
Water pipe is fixed.
Further, the experiment soil body in the main body cylinder is the weak water penetration soil body, using air free water saturation.
Further, the weak water penetration soil body is clay silt.
Further, the liquid in the plexiglass cylinder device is air free water.
Further, the position of the pore pressure gauge fixing device can be adjusted according to the needs of experiment, number
Amount can need to increase according to experiment；The pore pressure gauge fixing device installation is at various height.
It is a kind of to utilize a kind of test method for the one-dimensional cylinder test device for simulating the kinetic head boundary effect soil body, the party
Method includes the following steps：
(1) lead to air free water into main body cylinder from the first water flowing valve, the second water flowing valve remains turned-off, and treats that liquid level is higher than
The first water flowing valve is closed during valve 20mm；Main body cylinder and GDS standard controllers are connected by the second water flowing valve, open second
Water flowing valve, opens GDS standard controllers and carries out emptying operation, and it is logical that second is closed after gas in GDS standard controllers drains
Penstock；
(2) in pore pressure gauge fixing device upper installing hole gap water pressure gauge, by the signal transmission of pore pressure gauge
Line is connected to data collecting instrument；Then permeable stone is packed into main body cylinder；Layering is loaded the weak water penetration soil body and is tamped, each
One layer of wire netting is placed on plexiglass cylinder unit first during secondary sample-adding, the soil sample of certain mass is then penetrated into iron wire
Net is added in plexiglass cylinder unit, and the sample-adding process of each plexiglass cylinder unit is divided into three times, until filling out
Soil is completed；
(3) the weak water penetration soil body of air free water saturation was led to main body cylinder with the speed of 6L/ days from the first water flowing valve, treats soil
The first water flowing valve is closed after body is fully saturated；Outlet valve is opened, outlet valve is kept it turned on during entire experiment
So as to timely draining so that the water level line for testing the soil body is kept constant；
(4) reading of the pore pressure gauge under data collecting instrument acquisition and recording experiment original state is opened；Open second
Water flowing valve sets Pressure rise rates by GDS standard controllers, the stage pressure is recorded using data collecting instrument continuous acquisition
The reading of lower pore pressure gauge；Until the weak water penetration soil body, which occurs to dash forward, gushes destruction, the second water flowing valve, pause GDS marks are closed
Collimator controller and data collecting instrument read and record pressure reading on GDS standard controllers；Then remove the reality in main body cylinder
The soil body is tested, resets GDS standard controllers；
(5) it repeats to test using method as described above, changes the rate of artesian pressure variation, carry out multigroup experiment；It is logical
Cross the reading of data collecting instrument acquisition and recording each group confined water regime variation Pore Pressure meter；Every group of experimental result is carried out
It arranges, analyzes the reading of the confined water regime change procedure Pore Pressure meter of data collecting instrument acquisition and recording；By each group reality
It tests result to be compared, the lower foundation soil body failure mechanism of analysis dynamic artesian water effect.
Compared with the prior art, the beneficial effects of the invention are as follows：
1. the present invention takes circular cross-section model casing to carry out one-dimensional soil unit research after research object is simplified, avoid
Rectangular section model casing four angles may cause earth stress at this, deformation mutation.Breach previous scale (model) test
The defects of can be only formed simple experiment phenomenon and cannot illustrating inherent mechanism, the experiment carried out using the present invention can be from this structure
The angle of relationship discloses propagation law of the dynamic artesian water in aquiclude.
2. the present invention using the air free water saturation testing soil body, provides during experiment before the test and presses water environment without air bearing,
So that the hole of the experiment soil body has operated as above 2 benefits full of air free water：First, underwater bubble is avoided to enter weak water penetration
Soil layer causes the unsaturation problem of the soil body, and (compared with saturated soil, there are larger differences and uncertain for the mechanical characteristic of unsaturated soil
Property)；Second is that underwater bubble interference pore water pressure sensor is avoided to influence its measurement accuracy.
3. the present invention accurately adjusts the variation width of the pressure of the artesian water in main body cylinder using GDS standard controllers
Value and rate of change, so as to fulfill the simulation of the continuous dynamic change of artesian water in model casing；The signal transmission of pore pressure gauge
Line can continuously record the dynamic change situation of artesian water after being connect with multi-Channels Data Acquisition, realize dynamic change pressure-bearing hydraulic pressure
The monitoring of power.
4. the present invention fixes miniature pore water pressure sensor using sensor fastening device, during effectively avoiding experiment
Soil deformation leads to sensor measurement change in location and influences measuring accuracy.
Description of the drawings
Fig. 1 is the overall structure diagram for the one-dimensional cylinder test device that can simulate the kinetic head boundary effect soil body；
Fig. 2 is pore pressure gauge fixing device details detail drawing；
Fig. 3 (a) is bottom barrel sectional view；
Fig. 3 (b) is bottom barrel vertical view；
In figure：Main body cylinder 1；Top cylinder 1-1；Outlet valve 1-1-1；Pore pressure gauge fixing device 1-2；Bolt 1-
2‐1；Organic glass square toes 1-2-2；Pore pressure gauge 1-2-3；Waterproof rubber ring 1-3；Middle cylinder 1-4；Bottom barrel 1-
5；Plexiglass cylinder unit 1-5-1；Permeable stone 1-5-2；Organic glass pillar 1-5-3；First water flowing valve 1-5-4；Second
Water flowing valve 1-5-5；Trolley 1-6；GDS standard controllers 2；Plexiglass cylinder device 3；Data collecting instrument 4；Weak water penetration soil
Body 5；Air free water 6.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in Figure 1, the present invention can simulate the one-dimensional cylinder test device of the kinetic head boundary effect soil body, justify including main body
4 four cylinder 1, GDS standard controllers 2, plexiglass cylinder device 3, data collecting instrument parts.
The main body cylinder 1 by a section top cylinder 1-1, pore pressure gauge fixing device 1-2, waterproof rubber ring 1-3,
Several section middle cylinder 1-4, a section bottom barrel 1-5, trolley 1-6 are formed, and are made of per pitch circle cylinder one piece of organic glass, can
Facilitate the deformation of the soil body in observation experiment；Outlet valve 1-1-1, outlet valve 1-1-1 bottoms are installed on the top cylinder 1-1 barrels
It is flushed with experiment soil body top surface, outlet valve 1-1-1 is stayed open so as to timely draining during experiment so that the experiment soil body is put into
Water level line is kept constant；The top cylinder 1-1 bottom interior walls have screw thread, for splicing with middle cylinder 1-4；The pore water
Pressure gauge fixing device 1-2 is made of bolt 1-2-1, organic glass square toes 1-2-2, pore pressure gauge 1-2-3, per pitch circle cylinder
Different height upper installing hole gap water pressure fixing device 1-2, for measuring the pressure size of fixed position；The bolt 1-2-1
It is mounted on pore pressure gauge 1-2-3 containing on threaded organic glass square toes 1-2-2, organic glass square toes 1-2-2 passes through
Permeable stone and glass cement are connected with cylinder；The pore pressure gauge fixing device 1-2 passes through conducting wire and 4 phase of data collecting instrument
Even, confined water regime water pressure delta data can be acquired；The waterproof rubber ring 1-3 is mounted among two adjacent cylinders,
It prevents that leak occurs during experiment；Inner wall at the top and bottom of the middle cylinder 1-4 contains screw thread, for upper and lower two
Pitch circle cylinder is connected；The bottom barrel 1-5 is by plexiglass cylinder unit 1-5-1, permeable stone 1-5-2, organic glass pillar 1-
5-3, the first water flowing valve 1-5-4, the second water flowing valve 1-5-5 are formed；The organic glass short column 1-5-3 is fixed on organic glass
The bottom of glass cylinder unit 1-5-1, permeable stone 1-5-2 are mounted on above organic glass short column 1-5-3, ensure in the saturation soil body
Water can be uniformly upper in the process；The plexiglass cylinder unit 1-5-1 bottom sides are equipped with the first water flowing valve 1-5-4
For the saturation soil body, opposite side installs the second water flowing valve 1-5-5 for connecting GDS standard controllers 2；Second water-through valve
There is pressure ring on door 1-5-5 and GDS standard controllers 2, can will be used to connecting this two-part water pipe and fix；The trolley 1-6
For placing each pitch circle cylinder；The GDS standard controllers 2, can control the hydraulic pressure in main body cylinder；The plexiglass cylinder
Device 3 is for the soil body in saturation main body cylinder 1.Further, the soil body is the weak water penetration soil body 5 in main body cylinder 1, using nothing
Air water saturation.The position of the pore pressure gauge fixing device 1-2 can be adjusted according to the needs of experiment, and quantity can root
It needs to increase according to experiment；Pore pressure gauge fixing device 1-2 should be installed at various height.Experiment in main body cylinder 1
The soil body is the weak water penetration soil body 5 (such as clay silt), using air free water saturation.
As shown in Fig. 2, the organic glass square toes 1-2-2 on the pore pressure gauge fixing device 1-2 is provided with mounting hole
The threaded circular hole needed for threaded circular hole and installation bolt 1-2-1 needed for gap water pressure gauge 1-2-3.
As shown in Fig. 3 (a), 3 (b), the permeable stone 1-5-2 causes air free water and powder soil horizon hydraulic communication, provides silt
The artesian pressure of layer；The arrangement of the thickness and organic glass short column 1-5-3 of the permeable stone 1-5-2 should meet Force Calculation will
It asks so that it is enough to bear the weight of the experiment soil body.
The course of work of the present invention is as follows：Lead to air free water into main body cylinder 1-1 from the first water flowing valve 1-5-4 first
(the second water flowing valve 1-5-5 is remained turned-off) closes the first water flowing valve 1-5-4 when liquid level is higher than valve 20mm；By second
Water flowing valve 1-5-5 connection main body cylinder 1-1 and GDS standard controller 2 opens the second water flowing valve 1-5-5, opens GDS marks
Collimator controller 2 carries out emptying operation, and the second water flowing valve 1-5-5 is closed after gas in GDS standard controllers 2 drains.
In pore pressure gauge fixing device 1-2 upper installing hole gap water pressure gauge 1-2-3, by pore pressure gauge 1-2-3
Signal transmssion line be connected to data collecting instrument 4；Then permeable stone 1-5-2 is packed into main body cylinder 1-1；Layering filling cement
Silt is simultaneously tamped, and one layer of wire netting is placed on plexiglass cylinder unit 1-5-1 first when being loaded each time, then by one
The soil sample for determining quality is added to through wire netting in plexiglass cylinder unit 1-5-1, each plexiglass cylinder unit 1-
The sample-adding process of 5-1 is divided into three times, until completion of banketing.Justified from the first water flowing valve 1-5-4 with the speed of 6L/ days to main body
Cylinder 1-1 leads to air free water saturation testing soil body clay silt, treats to close the first water flowing valve 1-5-4 after the soil body is fully saturated.It beats
Water valve 1-1-1 is outputed, outlet valve 1-1-1 is kept it turned on so as to timely draining during entire experiment so that experiment soil
The water level line of body is kept constant.
After the completion for the treatment of above-mentioned experiment preparation, the hole under 4 acquisition and recording of data collecting instrument experiment original state is opened
The reading of water pressure gauge 1-2-3；The second water flowing valve 1-5-5 is opened, Pressure rise rates are set by GDS standard controllers 2,
The reading of pore pressure gauge under the stage pressure is recorded using 4 continuous acquisition of data collecting instrument；Until prominent gush occurs for clay silt
It destroys, closes the second water flowing valve 1-5-5, pause GDS standard controllers 2 and data collecting instrument 4, read and record GDS standards
Pressure reading on controller 2；Then remove the experiment soil body in main body cylinder 1-1, resetting GDS standard controllers 2.
It repeats to test using method as described above, changes the rate of artesian pressure variation, carry out multigroup experiment；Pass through number
According to the reading of 4 acquisition and recording each group confined water regime of Acquisition Instrument variation Pore Pressure meter 1-2-3.Finally to every group of experiment knot
Fruit is arranged, and analyzes the reading of the confined water regime change procedure Pore Pressure meter of 4 acquisition and recording of data collecting instrument；It will
Each group experimental result is compared, the lower foundation soil body failure mechanism of analysis dynamic artesian water effect.
Above-described embodiment is a preferred embodiment of the present invention, be to the content of present invention and its application furtherly
It is bright, it should not be construed as the present invention and be only applicable to above-described embodiment.All technologies realized based on the principle of the invention and invention content
It all belongs to the scope of the present invention.
Claims (8)
1. a kind of one-dimensional cylinder test device for simulating the kinetic head boundary effect soil body, which is characterized in that including main body cylinder
(1), (4) four GDS standard controllers (2), plexiglass cylinder device (3) and data collecting instrument parts；
The main body cylinder (1) includes a sequentially connected section top cylinder (1-1) from top to bottom, several section middle cylinder (1-
4), a section bottom barrel (1-5) and trolley (1-6)；The top cylinder (1-1), middle cylinder (1-4) and bottom barrel (1-
5) it is made of organic glass；Outlet valve (1-1-1), the outlet valve (1-1-1) are installed on top cylinder (1-1) barrel
Bottom is flushed with experiment soil body top surface, and outlet valve (1-1-1) is stayed open so as to timely draining during experiment so that experiment soil
Internal water level line is kept constant；
The different height upper installing hole gap water pressure of the top cylinder (1-1), middle cylinder (1-4) and bottom barrel (1-5)
Count fixing device (1-2)；The pore pressure gauge fixing device (1-2) is by bolt (1-2-1), organic glass square toes (1-2-
2), pore pressure gauge (1-2-3) forms；The bolt (1-2-1) and pore pressure gauge (1-2-3) are by being threadably mounted at
On the organic glass square toes (1-2-2), the organic glass square toes (1-2-2) by permeable stone and glass cement respectively with top
Cylinder (1-1), middle cylinder (1-4) are connected with bottom barrel (1-5)；The pore pressure gauge (1-2-3) and the number
It is connected according to Acquisition Instrument (4), acquires confined water regime water pressure delta data；In two adjacent pitch circle cylinders of the main body cylinder (1)
Between installation waterproof rubber ring (1-3)；
The bottom barrel (1-5) is by plexiglass cylinder unit (1-5-1), permeable stone (1-5-2), organic glass pillar (1-
5-3), the first water flowing valve (1-5-4), the second water flowing valve (1-5-5) are formed；The organic glass short column (1-5-3) is fixed
In the bottom of the plexiglass cylinder unit (1-5-1), the permeable stone (1-5-2) is mounted on the organic glass short column
Above (1-5-3)；Plexiglass cylinder unit (1-5-1) bottom side is equipped with the first water flowing valve (1-5-4) and is used for
Connect the plexiglass cylinder device (3), the soil body in saturation main body cylinder (1), opposite side is equipped with the second water flowing valve
(1-5-5) is for connecting the GDS standard controllers (2)；The GDS standard controllers (2) are for controlling main body cylinder (1) bottom
The artesian head in portion.
2. a kind of one-dimensional cylinder test device for simulating the kinetic head boundary effect soil body according to claim 1, special
Sign is that top cylinder (1-1) bottom interior wall has screw thread, for splicing with the middle cylinder (1-4)；The middle circle
Inner wall at the top and bottom of cylinder (1-4) contains screw thread, for being connected with upper and lower two pitch circles cylinder.
3. a kind of one-dimensional cylinder test device for simulating the kinetic head boundary effect soil body according to claim 1, special
Sign is that the second water flowing valve (1-5-5) is two-part with that will connect this with pressure ring on the GDS standard controllers (2)
Water pipe is fixed.
4. a kind of one-dimensional cylinder test device for simulating the kinetic head boundary effect soil body according to claim 1, special
Sign is that the experiment soil body in the main body cylinder (1) is the weak water penetration soil body (5), using air free water saturation.
5. a kind of one-dimensional cylinder test device for simulating the kinetic head boundary effect soil body according to claim 4, special
Sign is that the weak water penetration soil body (5) is clay silt.
6. a kind of one-dimensional cylinder test device for simulating the kinetic head boundary effect soil body according to claim 1, special
Sign is that the liquid in the plexiglass cylinder device (3) is air free water (6).
7. a kind of one-dimensional cylinder test device for simulating the kinetic head boundary effect soil body according to claim 1, special
Sign is that the position of the pore pressure gauge fixing device (1-2) can be adjusted according to the needs of experiment, and quantity can root
It needs to increase according to experiment；Pore pressure gauge fixing device (1-2) installation is at various height.
8. a kind of test method that the effect soil body in simulation kinetic head boundary is carried out using any one of claim 1-7 described devices,
It is characterized in that, this method includes the following steps：
(1) lead to air free water into main body cylinder (1-1) from the first water flowing valve (1-5-4), the second water flowing valve (1-5-5) is kept
It closes, the first water flowing valve (1-5-4) is closed when liquid level is higher than valve 20mm；It is connected and led by the second water flowing valve (1-5-5)
Body cylinder (1-1) and GDS standard controllers (2), open the second water flowing valve (1-5-5), open GDS standard controllers (2) into
Row emptying operation, the second water flowing valve (1-5-5) is closed after GDS standard controllers (2) interior gas drains；
(2) in pore pressure gauge fixing device (1-2) upper installing hole gap water pressure gauge (1-2-3), by pore pressure gauge (1-
Signal transmssion line 2-3) is connected to data collecting instrument (4)；Then permeable stone (1-5-2) is packed into main body cylinder (1-1)；Point
Layer loads the weak water penetration soil body (5) and tamps, and one layer of wire netting is placed on plexiglass cylinder list first when being loaded each time
On first (1-5-1), then soil sample is added to through wire netting in plexiglass cylinder unit (1-5-1), each organic glass
The sample-adding process of glass cylinder unit (1-5-1) is divided into three times, until completion of banketing；
(3) the weak water penetration of air free water saturation was led to main body cylinder (1-1) with the speed of 6L/ days from the first water flowing valve (1-5-4)
The soil body (5) is treated to close the first water flowing valve (1-5-4) after the soil body is fully saturated；Outlet valve (1-1-1) is opened, is entirely being tried
Outlet valve (1-1-1) is kept it turned on so as to timely draining during testing so that the water level line for testing the soil body is kept constant；
(4) reading of the pore pressure gauge (1-2-3) under data collecting instrument (4) acquisition and recording experiment original state is opened；It beats
The second water flowing valve (1-5-5) is opened, Pressure rise rates are set by GDS standard controllers (2), are utilized data collecting instrument (4)
Continuous acquisition records the reading of pore pressure gauge (1-2-3) under the stage pressure；Until prominent gush brokenly occurs for the weak water penetration soil body (5)
It is bad, the second water flowing valve (1-5-5), pause GDS standard controllers (2) and data collecting instrument (4) are closed, reads and records GDS
Pressure reading on standard controller (2)；The experiment soil body in main body cylinder (1-1) is then removed, resets GDS standard controllers
(2)；
(5) it repeats to test using method as described above, changes the rate of artesian pressure variation, carry out multigroup experiment；Pass through number
According to the reading of Acquisition Instrument (4) acquisition and recording each group confined water regime variation Pore Pressure meter (1-2-3)；To every group of experiment knot
Fruit is arranged, and analyzes the confined water regime change procedure Pore Pressure meter (1-2-3) of data collecting instrument (4) acquisition and recording
Reading；Each group experimental result is compared, the lower foundation soil body failure mechanism of analysis dynamic artesian water effect.
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| CN109187913A (en) * | 2018-08-28 | 2019-01-11 | 西安近代化学研究所 | A kind of cylinder test Simplified Test Equipment |
| CN111474047A (en) * | 2020-05-09 | 2020-07-31 | 合肥工业大学 | Test method for verifying hydrodynamic pressure in bank slope soil body |
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