CN107192535A - 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
- Publication number
- CN107192535A CN107192535A CN201710576016.0A CN201710576016A CN107192535A CN 107192535 A CN107192535 A CN 107192535A CN 201710576016 A CN201710576016 A CN 201710576016A CN 107192535 A CN107192535 A CN 107192535A
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- sample cap
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- soil body
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- 239000002689 soil Substances 0.000 title claims abstract description 37
- 230000003628 erosive effect Effects 0.000 title claims abstract description 20
- 238000011160 research Methods 0.000 title claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 238000002474 experimental method Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 4
- 238000013508 migration Methods 0.000 abstract description 4
- 230000005012 migration Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 229920000965 Duroplast Polymers 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention 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 sample cap setting bakie and sample cap outlet conduit, and the sample cap outlet conduit two 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 is resulted in 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 developed for full appreciation piping provides new angle.
Description
Technical field
The present invention relates to Geotechnical Engineering experimental test field, and in particular to soil body piping under one kind research complex stress condition
The experimental rig of Erosion Law.
Background technology
In earth-rock works, soil particle migration often occurs for the effect inside levee foundation due to seepage flow, ultimately results in soil body hair
Raw seepage failure, jeopardizes dam safety；The soil body in levee foundation is generally in the stress shape of complexity due to the effect of soil pressure simultaneously
Under state.Therefore, what soil body penetration was destroyed under the true actual stress state for simulating the soil body in levee foundation, development complex stress condition grinds
Study carefully with important engineering practical value.The seepage direction of piping mouthful 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 for determining soil particle, so that
To the erosion mechanism of piping；The true stress state that can not be simulated residing for the soil body having, what is had can not then consider stress state
Under conditions of apply seepage flow straight up.
The content of the invention
The technical problem to be solved in the present invention is：Soil body piping Erosion Law under a kind of research complex stress condition is provided
Experimental rig, to solve the technical problem in above-mentioned background technology.
The technical scheme that the present invention solves technical problem is as follows：
A kind of experimental rig for studying soil body piping Erosion Law under complex stress condition of the present invention, including base, confined pressure
Room, axial pressure device, axial pressure bar, sample, sample cap, water inlet pipe, outlet pipe, heat-shrink tube, are characterized in：Pressure indoor is set
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 is tightly connected with base, its
Resistance strain gage is provided with pipe shaft；Sample is arranged on the inside of heat-shrink tube, and it is provided with cobble filtering layer between base, its with
Stephanoporate steel plate is provided between sample cap；Sample cap has bakie and sample cap outlet conduit, and the one of the sample cap outlet conduit
End is connected with the outlet of bakie, and the other end is connected with the outlet pipe outside sample cap, and the end of the outlet pipe is provided with measuring cup；Water inlet
Pipe one end is connected through base with cobble filtering layer, and the other end is connected with seepage flow pressurizer；Water inlet pipe on outlet pipe with being provided with
Water pressure sensor；Axial pressure device is arranged on the outside of pressure indoor；Axial pressure bar one end through pressure indoor top and with
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 outlet diameter of the bakie on the sample cap and the diameter of sample cap outlet conduit are 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 that the present invention is provided is it can be considered that actual stress state in levee foundation suffered by the soil body, while the device is applied
Plus seepage flow straight up, water inlet pipe is connected with the water pressure sensor outside confined pressure room with outlet pipe, accurate can survey
The water pressure situation of change in soil body erosion process under seepage effect is measured, strain data collector and displacement transducer can be monitored
The soil body under complex stress condition is in erosion process, the dynamic changing process of soil deformation, and the present invention can be well
Piping mouthful bottom and the curtain downstream soil body are studied under seepage effect straight up, the migration rule of soil particle is comprehensive
The development mechanism for recognizing piping provides theoretical foundation.
Brief description of the drawings
Fig. 1 is the experimental rig structural representation of the invention；
Fig. 2 is the floor map of stephanoporate steel plate of the present invention；
Fig. 3 is the schematic elevation view of sample cap of the present invention；
Fig. 4 is the schematic side view of sample cap of the present invention；
Fig. 5 is the schematic top plan view of sample cap of the present invention；
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 embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in Figures 1 to 5, a kind of experiment dress for studying soil body piping Erosion Law under complex stress condition of the present invention
Put, including base 1, pressure indoor 2, axial pressure device 3, axial pressure bar 4, sample 5, sample cap 8, water inlet pipe 9, the and of outlet pipe 10
Heat-shrink tube 14, 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
The inside of heat-shrink tube 14 is arranged on, it is provided with cobble filtering layer 6 between base 1, it is provided with Multi-hole steel between sample cap 8
Plate 7；The sample cap 8 has bakie 15 and sample cap outlet conduit 16, one end and the bakie 15 of the sample cap outlet conduit 16
Outlet be connected, 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；It is described
The one end of water inlet pipe 9 is connected through base 1 with cobble filtering layer 6, and the other end is connected with seepage flow pressurizer 17；The water inlet pipe 9 with
Water pressure sensor 12 is provided with outlet pipe 10；The axial pressure device 3 is arranged on the outside of pressure indoor 2；Axial pressure
The one end of bar 4 is through the top of pressure indoor 2 and is connected 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, so sets and is advantageous in that and can prevent
Grain is blocked 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 sets the situation for being advantageous in that and can effectively preventing 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 by pressure, so as to influence result of the test, the caliber of outlet pipe 10 is set to
5mm, is carried over outside pressure indoor 2 when can effectively ensure the particle gushed out by 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 provide pressure for pressure indoor 2, and setting displacement transducer 20 and strain data collector 19 to monitor should in complexity
The soil body under power state is in erosion process, the dynamic changing process of soil deformation.
A kind of operation principle for studying the experimental rig of soil body piping Erosion Law under complex stress condition of the present invention
It is as follows：
It can apply confined pressure and bias to sample 5 to simulate truly should suffered by the soil body by experimental rig of the present invention
Power state, bakie 15 and sample cap outlet conduit 16 are arranged on sample cap 8, by outside duroplasts outlet pipe 10 and pressure indoor 2
Measurement apparatus (i.e. measuring cup 11) be connected with water pressure sensor 12, the water inlet of water inlet pipe 9 is connected with cobble filtering layer 6 to be arranged on
The bottom of sample 5, can simulate the seepage flow straight up suffered by the soil body.Seepage flow is increased by seepage flow pressurizer 17 step by step during experiment
Power makes sample 5 occur seepage deformation, and records different 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 seepage flow in soil body erosion process, finally gives complex stress condition down tube
The Erosion Law and development mechanism gushed, effective technical support and reason are provided for the piping dangerous situation forecast and administer in Practical Project
By foundation.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
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), 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
Outside in 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
Levying 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. the experiment of soil body piping Erosion Law under a kind of research complex stress condition according to claim any one of 1-5
Device, it is characterized in that：Also include confined pressure pressurizer (18), displacement transducer (20) and strain data collector (19)；Described
Confined pressure pressurizer (18) is connected through base (1) and with pressure indoor (2) by pipeline；Institute's displacement sensors (20), which are arranged on, to be enclosed
The top of pressure chamber (2)；The strain data collector (19) is connected with resistance strain gage (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710576016.0A CN107192535A (en) | 2017-07-14 | 2017-07-14 | The experimental rig of soil body piping Erosion Law under a kind of research complex stress condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710576016.0A CN107192535A (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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| Publication Number | Publication Date |
|---|---|
| CN107192535A true CN107192535A (en) | 2017-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710576016.0A Pending CN107192535A (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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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632139A (en) * | 2017-10-17 | 2018-01-26 | 中交第公路勘察设计研究院有限公司 | Consider each salt marsh earth salt expansive force test device and usage to confined pressure |
| CN108444786A (en) * | 2018-03-30 | 2018-08-24 | 青岛理工大学 | Soft rock cutting system appearance integrated device |
| CN110146395A (en) * | 2019-05-14 | 2019-08-20 | 浙江大学 | An indoor test device for measuring the seepage and erosion characteristics of multi-layer soil samples under in-situ pressure |
| CN110208123A (en) * | 2019-05-14 | 2019-09-06 | 浙江大学 | A kind of laboratory testing rig measuring soil sample seepage inflow erosion characteristic under pressure in situ |
| CN111024577A (en) * | 2019-08-27 | 2020-04-17 | 华南农业大学 | A test device and method for the effect of water immersion-underground corrosion coupling on soil mechanical properties |
| CN112964562A (en) * | 2021-01-28 | 2021-06-15 | 浙江工业大学 | Triaxial test equipment for measuring eroded soil particles under action of seepage force |
| CN114577440A (en) * | 2022-03-11 | 2022-06-03 | 浙江大学 | Physical model for generation and development of dike foundation piping and monitoring method |
| CN115112531A (en) * | 2022-07-07 | 2022-09-27 | 中铁南方投资集团有限公司 | Multifunctional osmotic piping test device and method |
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| CN102323159A (en) * | 2011-08-12 | 2012-01-18 | 河海大学 | Permeameter for contact surface of soil and works at high stress, high hydraulic gradient, and large shear deformation |
| CN102411042A (en) * | 2011-08-23 | 2012-04-11 | 河海大学 | Piping test device of seepage corrosion stress coupling |
| CN204389350U (en) * | 2015-01-05 | 2015-06-10 | 河海大学 | A kind of test unit studying curtain surface of contact soil particle migration rule |
| JP2016217043A (en) * | 2015-05-22 | 2016-12-22 | 国立研究開発法人土木研究所 | Method and device for assessing piping phenomenon |
| CN207147753U (en) * | 2017-07-14 | 2018-03-27 | 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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| CN102323159A (en) * | 2011-08-12 | 2012-01-18 | 河海大学 | Permeameter for contact surface of soil and works at high stress, high hydraulic gradient, and large shear deformation |
| CN102411042A (en) * | 2011-08-23 | 2012-04-11 | 河海大学 | Piping test device of seepage corrosion stress coupling |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632139A (en) * | 2017-10-17 | 2018-01-26 | 中交第公路勘察设计研究院有限公司 | Consider each salt marsh earth salt expansive force test device and usage to confined pressure |
| CN108444786A (en) * | 2018-03-30 | 2018-08-24 | 青岛理工大学 | Soft rock cutting system appearance integrated device |
| CN110146395A (en) * | 2019-05-14 | 2019-08-20 | 浙江大学 | An indoor test device for measuring the seepage and erosion characteristics of multi-layer soil samples under in-situ pressure |
| CN110208123A (en) * | 2019-05-14 | 2019-09-06 | 浙江大学 | A kind of laboratory testing rig measuring soil sample seepage inflow erosion characteristic under pressure in situ |
| WO2020228230A1 (en) * | 2019-05-14 | 2020-11-19 | 浙江大学 | Indoor test apparatus for measuring seepage erosion characteristics of multilayer soil samples under in-situ pressure |
| CN111024577A (en) * | 2019-08-27 | 2020-04-17 | 华南农业大学 | A test device and method for the effect of water immersion-underground corrosion coupling on soil mechanical properties |
| CN111024577B (en) * | 2019-08-27 | 2021-04-13 | 华南农业大学 | A test device and method for the influence of water immersion-subsurface corrosion coupling on soil mechanical properties |
| CN112964562A (en) * | 2021-01-28 | 2021-06-15 | 浙江工业大学 | Triaxial test equipment for measuring eroded soil particles under action of seepage force |
| CN114577440A (en) * | 2022-03-11 | 2022-06-03 | 浙江大学 | Physical model for generation and development of dike foundation piping and monitoring method |
| CN114577440B (en) * | 2022-03-11 | 2023-12-15 | 浙江大学 | Physical model for generating and developing dyke base piping and monitoring method |
| CN115112531A (en) * | 2022-07-07 | 2022-09-27 | 中铁南方投资集团有限公司 | Multifunctional osmotic piping test device and method |
| CN115112531B (en) * | 2022-07-07 | 2024-08-06 | 中铁南方投资集团有限公司 | A multifunctional penetration piping test device and method |
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Application publication date: 20170922 |
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