CN207147753U - The experimental rig of soil body piping Erosion Law under a kind of research complex stress condition - Google Patents
The experimental rig of soil body piping Erosion Law under a kind of research complex stress condition Download PDFInfo
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- CN207147753U CN207147753U CN201720860320.3U CN201720860320U CN207147753U CN 207147753 U CN207147753 U CN 207147753U CN 201720860320 U CN201720860320 U CN 201720860320U CN 207147753 U CN207147753 U CN 207147753U
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Abstract
The utility model discloses a kind of experimental rig for studying soil body piping Erosion Law under complex stress condition, including base, pressure indoor, axial pressure device, axial pressure bar, sample, sample cap, water inlet pipe, outlet pipe, heat-shrink tube, it is mainly characterized by setting bakie and sample cap outlet conduit on sample cap, and the sample cap outlet conduit both ends are connected with bakie outlet and outlet pipe respectively, water pressure sensor and measurement apparatus are set on the outlet pipe；Water pressure sensor is set on water inlet pipe and its one end is located to the bottom of sample, other end connection seepage flow pressurizer.Using the deformation rule and the migration rule of particle that accurate complex stress soil under action body can be obtained during this experimental rig, piping evolution of the soil body under seepage effect straight up under complex stress condition can be studied well, and the mechanism for full appreciation piping development provides new angle.
Description
Technical field
It the utility model is related to Geotechnical Engineering experimental test field, and in particular to the soil body under one kind research complex stress condition
The experimental rig of piping Erosion Law.
Background technology
In earth-rock works, because soil particle migration often occurs for the effect of seepage flow inside levee foundation, soil body hair is ultimately resulted in
Raw seepage failure, jeopardizes dam safety；The soil body in levee foundation is generally in complicated stress shape due to the effect of soil pressure simultaneously
Under state.Therefore, in real simulation levee foundation the soil body actual stress state, carry out complex stress condition under soil body penetration destroy grind
Study carefully with important engineering practical value.The seepage direction of piping mouth bottom and the curtain downstream soil body is often upward, is showed
Some experimental rigs can not combine seepage flow straight up with stress state the migration rule of measure soil particle, so as to
To the erosion mechanism of piping；The true stress state that can not be simulated residing for the soil body having, some can not then consider stress state
Under conditions of apply seepage flow straight up.
Utility model content
The technical problems to be solved in the utility model is：Soil body piping under a kind of research complex stress condition is provided and corrodes rule
The experimental rig of rule, to solve the technical problem in above-mentioned background technology.
The technical scheme that the utility model solves technical problem is as follows：
A kind of experimental rig for studying soil body piping Erosion Law under complex stress condition of the utility model, including base,
Pressure indoor, axial pressure device, axial pressure bar, sample, sample cap, water inlet pipe, outlet pipe, heat-shrink tube, are characterized in：Pressure indoor
It is arranged on base；Heat-shrink tube is arranged on the inside of pressure indoor, and its upper end is provided with sample cap, and its lower end connects with base sealing
Connect, resistance strain gage is provided with its pipe shaft；Sample is arranged on the inside of heat-shrink tube, and it is provided with cobble filter between base
Layer, it is provided with stephanoporate steel plate between sample cap；Sample cap has bakie and sample cap outlet conduit, the sample cap outlet pipe
The one end in road is connected with the outlet of bakie, and the other end is connected with the outlet pipe outside sample cap, the end amount of being provided with of the outlet pipe
Cup；Water inlet pipe one end is connected through base with cobble filtering layer, and the other end is connected with seepage flow pressurizer；On water inlet pipe and outlet pipe
It is provided with water pressure sensor；Axial pressure device is arranged on the outside of pressure indoor；Axial pressure bar one end passes through the top of pressure indoor
Hold and with being connected at the top of axial pressure device, the other end and sample cap top contact.
Further, the through-hole aperture on the stephanoporate steel plate is 5mm.
Further, the diameter of the outlet diameter of the bakie on the sample cap and sample cap outlet conduit is 5mm.
Further, the outlet pipe is hard plastic tube, and its caliber is 5mm.
Further, the outlet pipe is connected by screw thread valve with sample cap outlet conduit.
Further, described device also includes confined pressure pressurizer, displacement transducer and strain data collector；Described encloses
Pressure pressurizer is connected through base and with pressure indoor by pipeline；Institute's displacement sensors are arranged on the top of pressure indoor；It is described
Strain data collector is connected with resistance strain gage.
Experimental rig provided by the utility model is it can be considered that actual stress state in levee foundation suffered by the soil body, while the dress
The seepage flow applied straight up is put, water inlet pipe is connected with outlet pipe with the water pressure sensor outside pressure indoor, can be more accurate
Measurement seepage effect under water pressure situation of change in soil body erosion process, strain data collector and displacement transducer can
The soil body that monitoring is under complex stress condition is in erosion process, the dynamic changing process of soil deformation, the utility model energy
Enough piping mouth bottom and curtain downstream soil bodys studied well are under seepage effect straight up, the migration rule of soil particle
Rule, the development mechanism for full appreciation piping provide theoretical foundation.
Brief description of the drawings
Fig. 1 is the experimental rig structural representation of the present utility model；
Fig. 2 is the floor map of stephanoporate steel plate described in the utility model；
Fig. 3 is the schematic elevation view of sample cap described in the utility model；
Fig. 4 is the schematic side view of sample cap described in the utility model；
Fig. 5 is the schematic top plan view of sample cap described in the utility model；
1. base in figure, 2. pressure indoors, 3. axial pressure devices, 4. axial pressure bars, 5. samples, 6. cobble filtering layers, more than 7.
Hole steel plate, 8. sample caps, 9. water inlet pipes, 10. outlet pipes, 11. measuring cups, 12. water pressure sensors, 13. resistance strain gages, 14.
Heat-shrink tube, 15. bakies, 16. sample cap outlet conduits, 17. seepage flow pressurizers, 18. confined pressure pressurizers, the collection of 19. strain datas
Device, 20. displacement transducers.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in Figures 1 to 5, a kind of experiment for studying soil body piping Erosion Law under complex stress condition of the utility model
Device, including base 1, pressure indoor 2, axial pressure device 3, axial pressure bar 4, sample 5, sample cap 8, water inlet pipe 9, outlet pipe 10
With heat-shrink tube 14, it is characterized in：The pressure indoor 2 is arranged on base 1；The heat-shrink tube 14 is arranged on the inside of pressure indoor 2,
Its upper end is provided with sample cap 8, and its lower end is tightly connected with base 1, and resistance strain gage 13 is provided with its pipe shaft；The sample
5 are arranged on the inside of heat-shrink tube 14, and it is provided with cobble filtering layer 6 between base 1, and it is provided with porous between sample cap 8
Steel plate 7；The sample cap 8 has bakie 15 and sample cap outlet conduit 16, one end of the sample cap outlet conduit 16 and bakie
15 outlet is connected, and the other end is connected with the outlet pipe 10 outside sample cap 8, and the end of the outlet pipe 10 is provided with measuring cup 11；Institute
State the one end of water inlet pipe 9 through base 1 with cobble filtering layer 6 to be connected, the other end is connected with seepage flow pressurizer 17；The water inlet pipe 9
With being provided with water pressure sensor 12 on outlet pipe 10；The axial pressure device 3 is arranged on the outside of pressure indoor 2；Axially add
The one end of depression bar 4 is connected through the top of pressure indoor 2 and with the top of axial pressure device 3, the other end and the top contact of sample cap 8.
Through-hole aperture on stephanoporate steel plate 7 described in the present embodiment is 5mm, and so setting is advantageous in that and can prevent
Grain blocks at stephanoporate steel plate 7, so as to influence gushing out for particle.
The outlet diameter of bakie 15 on sample cap described in the present embodiment 8 and the diameter of sample cap outlet conduit 16 are
5mm, so setting is advantageous in that the situation that can effectively prevent particle from being blocked during taking out of.
Outlet pipe 10 described in the present embodiment is hard plastic tube, can effectively prevent the water big in pressure indoor 2 in pressurization
The crimp of outlet pipe 10 is made particle be blocked in pipe, so as to influence result of the test, the caliber of outlet pipe 10 is arranged to by pressure
5mm, the particle that effectively can ensure to gush out are carried over outside pressure indoor 2 when passing through pipeline.
Outlet pipe 10 described in the present embodiment is connected by screw thread valve with sample cap outlet conduit 16, uses screw thread valve
It may insure the quality of pipeline connection, and then the accuracy of guarantee test result.
The experimental rig described in the present embodiment also includes confined pressure pressurizer 18, displacement transducer 20 and strain data collection
Device 19；Described confined pressure pressurizer 18 is connected through base 1 and with pressure indoor 2 by pipeline；Institute's displacement sensors 20 are set
On the top of pressure indoor 2；The strain data collector 19 is connected with resistance strain gage 13.The dress centers confined pressure pressurizer
18 can be that pressure indoor 2 provides pressure, and setting displacement transducer 20 and strain data collector 19 can monitor should in complexity
The soil body under power state is in erosion process, the dynamic changing process of soil deformation.
A kind of work for studying the experimental rig of soil body piping Erosion Law under complex stress condition described in the utility model
Principle is as follows：
Confined pressure can be applied to sample 5 by experimental rig described in the utility model and biased true suffered by the soil body to simulate
Real stress state, bakie 15 and sample cap outlet conduit 16 are arranged on sample cap 8, pass through duroplasts outlet pipe 10 and pressure indoor
Measurement apparatus (i.e. measuring cup 11) outside 2 is connected with water pressure sensor 12, and the water inlet of water inlet pipe 9 connects with cobble filtering layer 6 to be set
Putting in the bottom of sample 5, can simulate seepage flow straight up suffered by the soil body.Increased step by step by seepage flow pressurizer 17 during experiment
Seepage force makes sample 5 that seepage deformation occur, and is recorded by strain data collector 19, displacement transducer 20 and measuring cup 11 etc.
The deformation of water pressure situation of change and the soil body under different seepage flow in soil body erosion process, finally gives complex stress condition
The Erosion Law and development mechanism of lower piping, the piping dangerous situation to forecast and administering in Practical Project provide effective technical support
And theoretical foundation.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (6)
1. it is a kind of study complex stress condition under soil body piping Erosion Law experimental rig, including base (1), pressure indoor (2),
Axial pressure device (3), axial pressure bar (4), sample (5), sample cap (8), water inlet pipe (9), outlet pipe (10) and heat-shrink tube
(14), it is characterized in that：Pressure indoor (2) is arranged on base (1)；Heat-shrink tube (14) is arranged on the inside of pressure indoor (2), its upper end
Sample cap (8) is provided with, its lower end is tightly connected with base (1), and resistance strain gage (13) is provided with its pipe shaft；Sample (5)
The inside of heat-shrink tube (14) is arranged on, it is provided with cobble filtering layer (6) between base (1), and it is set between sample cap (8)
There is stephanoporate steel plate (7)；Sample cap (8) has bakie (15) and sample cap outlet conduit (16), the sample cap outlet conduit (16)
One end be connected with the outlet of bakie (15), outlet pipe (10) of the other end with sample cap (8) outside is connected, the outlet pipe (10)
End is provided with measuring cup (11)；Water inlet pipe (9) one end is connected through base (1) with cobble filtering layer (6), and the other end is connected with seepage flow
Pressurizer (17)；Water inlet pipe (9) on outlet pipe (10) with being provided with water pressure sensor (12)；Axial pressure device (3) is set
In the outside of pressure indoor (2)；Axial pressure bar (4) one end is through the top of pressure indoor (2) and with connecting at the top of axial pressure device (3)
Connect, the other end and sample cap (8) top contact.
2. a kind of experimental rig for studying soil body piping Erosion Law under complex stress condition according to claim 1, it is special
Sign is：Through-hole aperture on the stephanoporate steel plate (7) is 5mm.
3. a kind of experimental rig for studying soil body piping Erosion Law under complex stress condition according to claim 1, its
It is characterized in：The outlet diameter of bakie (15) on the sample cap (8) and the diameter of sample cap outlet conduit (16) are 5mm.
4. a kind of experimental rig for studying soil body piping Erosion Law under complex stress condition according to claim 1, its
It is characterized in：The outlet pipe (10) is hard plastic tube, and its caliber is 5mm.
5. a kind of experimental rig for studying soil body piping Erosion Law under complex stress condition according to claim 1, its
It is characterized in：The outlet pipe (10) is connected by screw thread valve with sample cap outlet conduit (16).
6. a kind of experimental rig for studying soil body piping Erosion Law under complex stress condition according to claim 1, its
It is characterized in：Also include confined pressure pressurizer (18), displacement transducer (20) and strain data collector (19)；Described confined pressure pressurization
Device (18) is connected through base (1) and with pressure indoor (2) by pipeline；Institute's displacement sensors (20) are arranged on pressure indoor (2)
Top；The strain data collector (19) is connected with resistance strain gage (13).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720860320.3U CN207147753U (en) | 2017-07-14 | 2017-07-14 | The experimental rig of soil body piping Erosion Law under a kind of research complex stress condition |
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| CN201720860320.3U CN207147753U (en) | 2017-07-14 | 2017-07-14 | The experimental rig of soil body piping Erosion Law under a kind of research complex stress condition |
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| CN207147753U true CN207147753U (en) | 2018-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192535A (en) * | 2017-07-14 | 2017-09-22 | 中冶华天工程技术有限公司 | The experimental rig of soil body piping Erosion Law under a kind of research complex stress condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192535A (en) * | 2017-07-14 | 2017-09-22 | 中冶华天工程技术有限公司 | The experimental rig of soil body piping Erosion Law under a kind of research complex stress condition |
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