CN110057688A - A kind of cold area's pipeline pipeclay interface mechanical characteristic parameter experiment system - Google Patents
A kind of cold area's pipeline pipeclay interface mechanical characteristic parameter experiment system Download PDFInfo
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- CN110057688A CN110057688A CN201910333370.XA CN201910333370A CN110057688A CN 110057688 A CN110057688 A CN 110057688A CN 201910333370 A CN201910333370 A CN 201910333370A CN 110057688 A CN110057688 A CN 110057688A
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- pipeclay
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- soil sample
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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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- 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
- G01N2203/0025—Shearing
Abstract
The invention discloses a kind of cold area's pipeline pipeclay interface mechanical characteristic parameter experiment system, it includes for monitoring soil sample frost-heaving deformation during the temperature control box of steady temperature needed for containing the shear box for freezing soil sample, guarantee test, test and the monitoring device for freezing soil sample change in displacement, vertical load size, horizontal direction displacement and load during the test device of pipeclay relative motion, real-time monitoring test, the loading system and data collection system of offer horizontal direction load and vertical load.The configuration of the present invention is simple designs reasonable and practical easy to operate, good practical effect, can simulate the relative motion at cold area's pipeclay interface indoors, and can carry out validity test to freeze soil sample internal temperature, the relative displacement of pipeclay boundary layer and load during test.
Description
Technical field
Present invention relates particularly to cold area's pipeline pipe-Soil Interface mechanical property parameters pilot system and measuring methods, belong to soil
Work test apparatus technical field.
Background technique
Pipe-Soil Interface problem is the hot issue of pipe-soil interaction research field, pipe-pedosphere surface layer mechanical response
The character in oil pipeline in cold region road is had a major impact.In recent years, a large amount of emerging with the area oil/gas pipe line Deng Han lifeline engineering
It builds, frozen swell and melt settlement has become the most important engineering project disaster faced in the cold area's lifeline engineering process of construction in China, serious prestige
Coerce the operation safety of lifeline engineering.China's frozen soil area distributions are extensive, and wherein ever-frozen ground accounts for about national territorial area
22.3%, high mountain permafrost area the first in the world, and frost zone distribution is more extensive.Land petroleum pipeline is after above-mentioned
When the complicated geologies location such as permafrost region, due to high temperature and pressure oil gas of its conveying easily make along frozen soil frost heave and thaw collapse calamity occurs
Harmful, " dew pipe " phenomenon easily occurs for cold area's buried pipeline, and bending deformation (1) cold area's oil and gas pipeline line of project soil is generated when serious
The variation of temperature, the frost-heaving deformation of the migration of (2) inside soil body moisture and freezing and expansion and (3) soil body.The soil body becomes in frost heave
During shape, internal temperature changes with the variation of environment temperature, and water freezing expansion, volume increase in soil, and therefore, temperature becomes
Change causes water content in the soil body, pore water pressure etc. to change, and causes the major parameters such as the porosity of the soil body, Penetration Signature
And the change of liquid-heat-stress coupling characteristic；Temperature change easily makes inside soil body generate temperature gradient, and water is because of temperature gradient in soil
It migrates, part water is because of temperature gradient freezing and expansion in soil, so that body frost heaving thaw collapse be caused to deform, it is buried defeated to induce cold area
Oil-gas pipeline bending deformation even destroys, and crude oil leakage causes serious environmental pollution and huge economic loss.
Currently, pipeclay interface problem causes domestic and international researcher and designer in cold area pipeclay interaction field
The extensive concern of member, the interaction method studied between body frost heaving or thaw collapse and buried pipeline mainly have theoretical research, have
Finite element analysis and model test.Wherein, theoretical research and finite element method are mainly studied draws under frost heave or thaw collapse effect
The ess-strain for playing the displacement of buried pipeline bending deformation and pipeline itself is horizontal；Model test method studies pipeline passively by masterpiece
Vertical motion under and its pipe deforming under varying environment temperature action are tested than ruler, obtain resistance of soil and pipeline position
Variation relation between shifting, and influence the vital pipeclay interface mechanics characteristic of pipeline bending deformation and seldom have been reported that, it is detailed in
Document < Nixon, J.F., Morgenstern, N.R., Reesor, S.N., 1983.Frost heave-pipeline
interaction using continuum mechanics.Canadian Geotechnical Journal,20(2):
251-261.>, document<Selvadurai, A.P.S., Hu, J., Konuk, I., 1999b.Computational modelling
of frost heave induced soil-pipeline interaction II:Modelling of experiments
at the Caen test facility.Cold Regions Science and Technology,29(3):229-257.
>, document<Hawlader, B.C., Morgan, V., Clark, J.I., 2006.Modelling of pipeline under
differential frost heave considering post-peak reduction of uplift resistance
In frozen soil.Canadian geotechnical journal, 43 (3): 282-293.>and document<Nishimura,
S.,Gens,A.,Olivella,S.,Jardine,R.J.2009.THM-coupled finite element analysis
of frozen soil:formulation and application.Géotechnique,59(3),159.>；It is main both at home and abroad
To use " Oil Transportation Pipeline Engineering design specification " (GB 50253-2014), " long oil and gas pipeline engineering construction and acceptance specification "
(GB50369-2014), " ALA Guidelines for the design of buried steel pipe (2001) " and
These specifications of U.S. API petroleum specification are designed cold area's oil/gas pipe line, wherein to the interface of pipeclay interface mechanics characteristic
Nothing clearly defines.In order to study changing rule of the pipeclay interface mechanics characterisitic parameter under different temperatures gradient effect, by applying
Add vertical displacement, vertical stress, shear displacemant, shear stress, according to the pipeclay interface angle Mo Cha and shearing strength, establishes pipeclay circle
The ess-strain physical model in face.
Pipe-pedosphere surface layer mechanical characteristic is pipe-pedosphere surface layer when oil pipeline in cold region road and frozen soil generation relative movement
Antiskid dynamic characteristic, this antiskid dynamic characteristic RmIt may be defined as pipe-pedosphere surface layer shearing strength (and antiskid kinetic force) and frozen soil
The ratio between itself shearing strength, i.e.,
R in formulam- Han Qu pipe-pedosphere surface layer anti-slide ability；
τpsf- Han Qu pipe-pedosphere surface layer shearing strength；
τsf- frozen soil shearing strength；
Therefore, Han Qu pipe-pedosphere surface layer anti-slide performance and temperature, roughness, frozen soil character, pipe-Soil Interface rub Cha Jiao, anti-
It is related to cut the factors such as intensity.The interaction property of same pipe surface material and various soil mass is different, i.e., for freezing
Tie sand and frozen clay, Han Qu pipe-pedosphere surface layer anti-slide performance RmValue is different, it is necessary to pass through different pipe surface materials
Freeze soil sample with difference and carries out experimental study determination at different temperatures.
Therefore cold area's pipeline pipe-Soil Interface mechanical property parameters pilot system and measuring method are needed, is tested by applying
Required load monitors the relative displacement of pipeclay interface, obtains the load-displacement curve and stress-strain relation between pipeclay interface.
Summary of the invention
It is an object of the present invention to provide a kind of cold area's pipeline pipeclay interface mechanical characteristic parameter experiment systems, it can effectively be solved
Certainly in the presence of background technique the problem of.
In the presence of solving the problems, such as background technique, including holder device, pipeclay interface device, detection device, number
According to acquisition device, loading device, the holder device includes temperature control box, pedestal, column, crossbeam, and temperature control box is provided needed for test
Constant low temperature, and install on the base, the stability that column and crossbeam are used to guarantee vertically to load；The pipeclay interface device peace
It on bottom plate, is placed in temperature control box comprising freeze soil sample, shear box, pipe surface thermal insulation material and structural panel；Institute
Stating detection device includes temperature sensor, axial force sensor, displacement sensor, and temperature sensor, which is placed in, to be freezed inside soil sample, axis
Force snesor is mounted on transmission rod, and displacement sensor is mounted on the inside of structural panel side, pressurization loading plate and temperature control box；Institute
Data acquisition device is stated to include laptop, data collecting instrument, data acquisition line connection all sensors and adopt by data
Collect instrument and connects laptop；The loading device includes that servomotor, gear reducer, transmission rod, counterweight, guide rod, pressurization are held
Support plate, servo motor and speed reducer be mounted on the base, transmission rod be used to transmit the horizontal direction load of application in structural panel,
Guide rod is fixed on inside pressurization loading plate and temperature control box, and counterweight is installed on the guide bar.
Due to using above technical scheme, the invention has the following advantages: the present invention is directed to directly test pipeline
Relative motion between the soil body applies horizontal direction, vertical load by loading system, simulation pipeline relative motion, on pipeline
Floating resistance of soil, by the relative displacement and axial resistance of soil size of monitoring system measurements pipeline and the soil body, obtain pipeline with
Displacement-load relationship of the shearing layer soil body of soil body contact surface, so that the stress-strain relation of contact surface shearing layer soil body is obtained,
Analysis obtains the Specifeca tion speeification for influencing shear resistance between pipeline interface and the soil body, for area's pipeline pipe-Soil Interface mechanics of trembling with fear
Performance and cold area's pipe design provide parameter foundation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the top view of insole board of the present invention；
Fig. 3 is the bottom view of insole board of the present invention；
Fig. 4 is the bottom view of structural panel in the present invention；
Fig. 5 is the bottom view of shear box in the present invention.
1-pedestal；2-columns；3-temperature control boxs；
4-stabilizer blades；5-bottom plates；6-orientation pulleys；
8-pipe surface thermal insulation materials
7-structural panels；(hard polyethylene plastics, blanket of glass wool)；9-shear boxs；
10-freeze soil sample；11-fixed links；12-temperature sensors；
13-pressurization loading plates；14-counterweights；15-displacement sensors；
16-guide rods；17-crossbeams；18-fixture nuts；
19-axial force sensors；20-data acquisition lines；21-data collecting instruments；
22-laptops；23-speed reducers；24-servo motors；
25-pedestals；26-transmission rods；27-guide rails.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below will
In conjunction with the attached drawing in the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described.
Embodiment 1
Referring to Fig. 1-5, the present embodiment includes holder device, pipeclay interface device, detection device, data acquisition device, adds
It carrying and sets, the holder device includes temperature control box 3, pedestal 1, column 2, crossbeam 17, and temperature control box, which provides, tests required constant low temperature,
And it is mounted on pedestal 1, the stability that column 2 and crossbeam 17 are used to guarantee vertically to load；The pipeclay interface device is mounted on
It on bottom plate 5, is placed in temperature control box 3 comprising freeze soil sample 10, shear box 9, pipe surface thermal insulation material 8 and structural panel
7；The detection device includes temperature sensor 12, axial force sensor 19, displacement sensor 15, and temperature sensor 12, which is placed in, to be freezed
Inside soil sample 10, axial force sensor 19 is mounted on transmission rod 26, and displacement sensor 15 is mounted on 7 side of structural panel, pressurization
3 inside of loading plate 13 and temperature control box；The data acquisition device includes laptop 22, data collecting instrument 21, data acquisition
Line 20 connects all sensors and connects laptop 22 by data collecting instrument 21；The loading device includes servo motor
24, speed reducer 23, transmission rod 26, counterweight 14, guide rod 16, pressurization loading plate 13, servo motor 24 and speed reducer 23 are mounted on
On pedestal 25, transmission rod 26 be used for transmit apply horizontal direction load in structural panel 7, guide rod 16 be fixed on pressurization carry
Inside plate 13 and temperature control box 3, counterweight 14 is installed on the guide bar.
Temperature control box 3:Xutemp XT5402-TC150 in the present embodiment；
Data collecting instrument 21:Campbell CR3000；
Temperature sensor 12:Geo-expert Thermo PT100；
Displacement sensor 15:Geo-expert LVDT100；
Axial force sensor 19:JLBM (production of Shanghai peacekeeping observing and controlling Science and Technology Ltd.), can also select according to physical condition
With the device of other models.
Embodiment 2
In the present embodiment, technical solution of the present invention has holder device, the temperature control box 3 including guarantee test required temperature, will
It is placed on pedestal 1, guarantees the stabilization of temperature control box.Temperature control box 3 provides test temperature (- 20 DEG C~40 for entire pilot system
DEG C), in order to ensure the stability vertically loaded, column 2, crossbeam 17 and fixture nut 18 are used for fixed guide pole 16, guarantee weight
14 load of code is located at vertical centerline.
In the present embodiment, technical solution of the present invention has pipeclay interface device, including freezes soil sample 10, is installed in shearing
In box 9, experiment required temperature is freezed to, is placed on pipe surface thermal insulation material 8.Wherein, shear box 9 is fixed through fixed link 11
In temperature control box 3, prevent shear box from horizontal direction displacement occurs.In order to measure the internal temperature variation for freezing soil sample, temperature is passed
Sensor 12, which is embedded in, to be freezed in soil sample 10, and with 22 data real-time, interactive of Acquisition Instrument 21 and laptop；Pipe surface heat preservation
Material 8 is fixed on structural panel 7, and oriented pulley 6 is placed on bottom plate 5, in order to guarantee that loading system provides horizontal direction lotus
It carries, adjusts the height of stabilizer blade 4, it is ensured that transmission rod 26 is fixed at 7 left side center of structural panel, and exports lotus with speed reducer 23
Sustained height is kept at load.
In the present embodiment, technical solution of the present invention has detection device and data acquisition device, including horizontally two positions
Displacement sensor 15 monitors the horizontal direction displacement of pipe surface thermal insulation material 8, and vertical symmetrical two displacement sensors 15 monitoring is frozen
The variation of knot 10 top displacement of soil sample, its purpose being arranged symmetrically are the change in displacement of monitoring pressure loading plate two sides.Horizontal direction
Axial force sensor 19 monitor the horizontal direction load that servo motor 24 and speed reducer 23 are applied, and vertical axle power sensing
Device 19 monitors the vertical load size that counterweight 14 is applied.The monitoring of temperature sensor 12 is freezed internal temperature in soil sample 10 and is changed,
To ensure that soil sample temperature reaches test requirements document.Its displacement sensor 15, axial force sensor 19 and temperature sensor 12 are adopted through data
Line concentration 20 and 22 data real-time, interactive of Acquisition Instrument 21 and laptop, can real-time monitoring freeze the temperature field of soil sample, deformation field
And the relative displacement of pipeclay boundary layer, and carry out data processing and finishing analysis.
In the present embodiment, technical solution of the present invention has loading device, including servo motor 24 and speed reducer 23 apply experiment
Required horizontal direction displacement or axle power, and servo motor 24 and speed reducer 23 are placed on pedestal 25, guarantee its stabilization, does not have
The displacement of any direction.Axial force sensor 19 applies pipeline axial force size for monitoring, and pipe surface material displacement is passed by displacement
Sensor 15 detects, and structural panel 7 and the oriented pulley of pipe surface material 8 are placed on bottom plate 5.It is pressurized by counterweight 14
Loading plate 13 applies the load-displacement for freezing 10 top of soil sample, and it is perpendicular in freezing soil sample 10 that guide rod 16 guarantees that counterweight 14 is further applied load
To at position of center line, the change in displacement of soil sample 10 during the whole test process is freezed by the monitoring of displacement sensor 15, and pass through
Data acquisition line 20 and 22 data real-time, interactive of Acquisition Instrument 21 and laptop
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (1)
1. a kind of cold area's pipeline pipeclay interface mechanical characteristic parameter experiment system, including holder device, pipeclay interface device, detection
Device, data acquisition device, loading device, which is characterized in that the holder device includes temperature control box, pedestal, column, crossbeam,
Temperature control box, which provides, tests required constant low temperature, and installs on the base, the stability that column and crossbeam are used to guarantee vertically to load；
The pipeclay interface device is mounted on bottom plate, is placed in temperature control box comprising is freezed soil sample, shear box, pipe surface and is protected
Adiabator and structural panel；The detection device includes temperature sensor, axial force sensor, displacement sensor, temperature sensor
It is placed in and freezes inside soil sample, axial force sensor is mounted on transmission rod, and displacement sensor is mounted on structural panel side, pressurization is held
On the inside of support plate and temperature control box；The data acquisition device includes computer, data collecting instrument, data acquisition line connection all sensors
And computer is connected by data collecting instrument；The loading device include servomotor, gear reducer, transmission rod, counterweight, guide rod,
Pressurize loading plate, and servo motor and speed reducer are mounted on the base, transmission rod is used to transmit the horizontal direction load applied in structure
On panel, guide rod be fixed on pressurization loading plate and temperature control box inside, counterweight install on the guide bar.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110849930A (en) * | 2019-09-11 | 2020-02-28 | 东北石油大学 | Experimental device for measuring interaction between frozen soil and buried pipeline and preparation method |
| CN112255118A (en) * | 2020-09-28 | 2021-01-22 | 浙大宁波理工学院 | Testing device and testing method for interaction between soil and underground building structure |
| CN112748023A (en) * | 2020-12-29 | 2021-05-04 | 广西科技大学 | Geosynthetic material temperature control oblique shear test device and test method |
| CN113237763A (en) * | 2021-01-22 | 2021-08-10 | 中国地质大学（武汉） | Vehicle-mounted in-situ deep frozen soil thawing and sinking test device and implementation method |
| CN113504175A (en) * | 2021-06-21 | 2021-10-15 | 中山大学 | Pipe-soil contact interface friction coefficient measuring method |
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| CN113504175A (en) * | 2021-06-21 | 2021-10-15 | 中山大学 | Pipe-soil contact interface friction coefficient measuring method |
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Application publication date: 20190726 |