CN204154610U - Loess increase and decrease green deformation process simulation experimental provision - Google Patents
Loess increase and decrease green deformation process simulation experimental provision Download PDFInfo
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- CN204154610U CN204154610U CN201420610090.1U CN201420610090U CN204154610U CN 204154610 U CN204154610 U CN 204154610U CN 201420610090 U CN201420610090 U CN 201420610090U CN 204154610 U CN204154610 U CN 204154610U
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Abstract
The utility model discloses a kind of loess increase and decrease green deformation process simulation experimental provision, it relates to a kind of experimental provision.It comprises cylindrical shell, base, heating arrangement, detection instrument and data acquisition unit, is provided with heating arrangement in base, and base is provided with cylindrical shell, and inner barrel is provided with detection instrument, detection instrument external data collector; Described cylindrical shell comprises inner core and urceolus, is marked with water between inner core and urceolus, and inner core, built with soil sample, urceolus is provided with vertical rule, the stack shell of cylindrical shell is distributed with two vertical setting of types circular holes, and the angle between two vertical setting of types is 135 °; Bottom described inner core, sidewall is also provided with the circular hole of the distribution in plum blossom-shaped.The utility model structure is simple, easy to operate, can measure crack tension force, measures accurately and reliably.
Description
Technical field
The utility model relates to a kind of experimental provision, be specifically related to a kind of loess increase and decrease green deformation process simulation experimental provision.
Background technology
Loess is a kind of quaternary sediment, is distributed in the large areas of NORTHWEST CHINA and Little Valleys In The Middle Reaches of The Yellow.Due to the origin cause of formation that it is special, loess inner structure and formalness feature very unique, he has based on powder, macropore, and vertical cranny development, is rich in the series of features such as soluble salt.Just because of this special nature, loess is made to have settlement by soaking in various degree.The settlement by soaking of loess refers to that loess is under the effect of upper overburden layer gravity stress, or under gravity stress and extra-stress acting in conjunction, and the character of remarkable additional deformation occurs because of the structural failure of soil after soaking.
Loess is in the large area distribution of NORTHWEST CHINA area, and the distribution area of collapsible loess is about 3/4 of the loess distribution total area.Along with the propelling of China's west development policy, more Human dried bloodstains (railway, highway, workshop building etc.) need to carry out in these Collapsible Loess District, so to the research of collapsible loess and closely related to the development of the engineering constructions such as the agricultural of the research of the relation of the percolation law of moisture in loess and sedimentation and this area, industry, water conservancy, traffic and building.Past 50 Years comes, and respond to the call of one's country, vast ground worker has put in the research of collapsible loess and loess seepage flow.
The main experimental methods of Assessment of loess collapsibility is divided into on-the-spot original position to test and laboratory experiment.Field experiment is divided into field static load test stabilization and immersion test of testing pits, and laboratory experiment is divided into single compression curve method and two compression curve method.In addition by doing Seepage Experiment, water translocation situation in loess is observed to the study general of seepage flow.
1, field static load test stabilization
On-the-spot static loading experiment refers to that the mode utilizing top to add static load applies axial stress, the relation of observation time and sedimentation.Utilize the actual observed value of settling amount to evaluate the settlement by soaking of loess.Needed for the method, experimental facilities has: lifting jack, load sensor, displacement transducer and dial gauge.
2, to test pits immersion test
Excavate one circular or squarely to test pits at the scene, make it soak, measure the saturated yielding amount after immersion by arranging dark punctuate, shallow punctuate and ground observation punctuate thus judge settlement by soaking simultaneously.
3, single compression curve method
Be called for short single line method.With (or multiple) sample be compressed to certain pressure stable after soak again, the graph of relation of saturated yielding settling amount and pressure obtains a compression curve, determines collapse initial compression etc.
4, two compression curve method
Be called for short Double-Line Method.With two pieces of cutting ring samplings of same sampled point, one piece is done compression experiment under natural moisture content, and another block, after the contracting of 25kPa pressure is stable, adds water saturation continuation and is forced into stable under immersion condition.Experiment draws two compression curves, calculates coefficient of collapsibility, thus determines initial collapsed pressure.
5, Seepage Experiment
Seepage Experiment is a kind of hydrogeological experimental technique.Its experimental principle is based on famous Darcy's law, for measuring the infiltration coefficient of moisture in certain medium, percolation flow velocity etc., thus reflection soil body feature.
Above-mentioned experimental technique has following shortcoming:
(1), the construction of on-the-spot load test stabilization is complicated, and experimental cost is high, because load is generally laid particular stress on, loads more difficult.And required instrument is more, comprise lifting jack, load sensor, displacement transducer and dial gauge, relative laboratory experiment is more coarse, and error is larger.
(2), immersion test of testing pits also is field trial, and first experimental cost is high, and secondly due to construction site complicated condition, foundation soil uneven, limit, hole has load or people experiment all can be caused to occur comparatively big error for draining, wayward.
(3), indoor single line method can not ensure the homogeneity of the every character of the soil body can cause error, and its experiment to take time and effort in sampling.Apply not too extensive.
(4), the relative single line method of indoor Double-Line Method has greater advantage, but also there is sampling and be difficult to ensure its homogeneity problem, and after immersion in advance more step by step pressurization be not inconsistent with the actual Collapse Process of collapsible loess.
Generally speaking, field trial is more coarse, and influence factor is many, and cost is high, and difficult operation, error is large.Laboratory experiment, because soil sample is by disturbance, is difficult to accurately reflect on-the-spot truth.
Utility model content
For the deficiency that prior art exists, the utility model object is to provide a kind of loess to increase and decrease green deformation process simulation experimental provision, structure is simple, easy to operate, the crack tension force that Loess Collapsibility settling amount, the inner different depth of loess and different time sections matric suction and water cut and soil body surface chap can be measured, measure accurately and reliably.
To achieve these goals, the utility model realizes by the following technical solutions: loess increase and decrease green deformation process simulation experimental provision, comprise cylindrical shell, base, heating arrangement, detection instrument and data acquisition unit, heating arrangement is provided with in base, base is provided with cylindrical shell, inner barrel is provided with detection instrument, detection instrument external data collector; Described cylindrical shell comprises inner core and urceolus, is marked with water between inner core and urceolus, and inner core, built with soil sample, urceolus is provided with vertical rule, the stack shell of cylindrical shell is distributed with two vertical setting of types circular holes, and the angle between two vertical setting of types is 135 °; Bottom described inner core, sidewall is also provided with the circular hole of the distribution in plum blossom-shaped.
As preferably, described base comprises cement tub, steel substrate, angle sheave and handrail, is provided with cement tub between steel substrate and cylindrical shell, is also provided with heating arrangement between cement tub, steel substrate, be provided with angle sheave bottom steel substrate, steel substrate side is fixed with handrail.
As preferably, described heating arrangement is separable portable electric stone or metal plate for standing a stove on as a precaution against fire.
As preferably, described detection instrument is moisture probe, tension probe and foil gauge, and moisture probe, tension probe are embedded in the different depth position of soil sample respectively by the circular hole of two vertical setting of types on cylindrical shell, and foil gauge is arranged on the surface of soil sample.
As preferably, described data acquisition unit adopts the EM50 data acquisition unit of Beijing genome company, conveniently stores, safe and reliable.Can simultaneously external multiple probe.
As preferably, described cylindrical shell adopts acrylic cylindrical shell.
The beneficial effects of the utility model:
(1), this experimental provision scale is large, and volume is greater than 3m
3, more accurately can reflect field condition, solve the limitation of cutting ring sampling;
(2), this experimental provision experimental cost is low, effective, solves the problem of field trial high cost;
(3), bottom of device is equipped with 4 angle sheaves, conveniently moves position back and forth;
(4), dress soil sample cylinder is transparent acrylic pipe, conveniently observes Moisture Transfer Rule;
(5), this device is that two diameters cylindrical tube not etc. is nested together, one circle aperture is set, water filling between two barrels, interior wound packages soil sample bottom inner core stack shell, simulate upwards seepage flow situation with this utilized head difference, study the impact of different seepage direction on loess.This is that other experimental facilitiess are inaccessiable.
(6), this experimental provision utilizes electric furnace heating wire to the heating of steel chassis, and chassis contacts with the soil body, thus the speed of manual control moisture upwards seepage flow, make experiment reach the condition oneself wanted.
(7), by stack shell one vertical setting of types aperture, by the water cut (experiment of the multilayer soil body can be realized) of soil body different time different depth in moisture probe Real-Time Monitoring cylinder.
(8), by stack shell one vertical setting of types aperture, with the matric suction (experiment of the multilayer soil body can be realized) of soil body different time different depth in tension probe Real-Time Monitoring cylinder.
(9), by the rule of transparent stack shell soil body settling amount can be read by naked eyes, very accurately convenient.
(10), after dress soil sample, the large (3.14m of soil sample surface area
2), easily observe soil body surface be full of cracks situation after seepage flow, arrange foil gauge simultaneously, can measure crack tension force in soil body surface, this experiment has larger contribution to loess be full of cracks research.
Accompanying drawing explanation
The utility model is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is structural representation of the present utility model;
Fig. 2 is understructure schematic diagram of the present utility model.
Embodiment
The technological means realized for making the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the utility model further.
With reference to Fig. 1, this embodiment is by the following technical solutions: loess increase and decrease green deformation process simulation experimental provision, comprise cylindrical shell 1, base 2, heating arrangement 3, detection instrument 4 and data acquisition unit 5, heating arrangement 3 is provided with in base 2, base 2 is provided with cylindrical shell 1, cylindrical shell 1 inside is provided with detection instrument 4, detection instrument 4 external data collector 5; Adopt transparent acrylic pipe as stack shell material, be divided into inside and outside two, inner diameter of steel flue 90cm, the thick 1cm of barrel; Outer barrel diameter 100cm, the thick about 1cm of barrel.Two are nested on base in concentrically ringed form in the plane.Separate with cement tub between inner core and bottom steel plate, prevent heating from damaging (during heating, urceolus is dismantled, and inner/outer tube is all detachable) cylinder.Urceolus there is vertical rule, conveniently observe sedimentation.Stack shell is distributed with the small sircle hole of two vertical setting of types diameter 1cm interval 10cm, and angle about 135 ° between two vertical setting of types, Bound moisture sub-probe and tension probe, this some holes is used for measuring diverse location water content of soil and matric suction respectively.Also have equivalent specifications aperture arrangement bottom stack shell, interval 5cm, in plum blossom-shaped along barrel distribution one circle, this some holes makes the moisture between two infiltrate in the inner core soil body from bottom, simulates the situation of upwards seepage flow.
Base 2 is divided into three parts: cement tub, steel substrate, angle sheave and handrail; Cement tub is positioned in steel substrate, and diameter is about 90cm, wide about 3cm, and height is 3cm about, groove depth 1cm, wide 1cm, for fixing inner core and heat insulation.Steel substrate is a diameter 100cm, and the disk of thick 1cm, mainly fixes load-bearing effect and heat conduction.Angle sheave and handrail are welded on base plate, convenient mobile, make experiment be easy to operation.
Heating arrangement 3 is a separable portable electric stone or metal plate for standing a stove on as a precaution against fire, and energising can meet heating, by the soil body in steel substrate heat conduction to cylinder, and the experiment condition that manual control seepage flow speed is wanted to reach experimenter.
Detection instrument 4 is divided into moisture probe, tension probe and foil gauge.Be embedded in soil body different depth place respectively, come Real-Time Monitoring water content of soil and matric suction; Foil gauge is arranged in soil body surface, measures crack tension force.Moisture probe and the equal external data collector of tension probe.
Data acquisition unit 5 adopts the EM50 data acquisition unit of Beijing genome company, convenient storage, safe and reliable.Can simultaneously external multiple probe.
This embodiment can do soil body be full of cracks experiment, observes soil body infiltration rear surface be full of cracks process and measures crack tension force; Achieve indoor seepage tests from the top down and from bottom to top simultaneously; By controlling head difference manual control Seepage Experiment condition; By heating manual control seepage flow speed from bottom to top; The soil body that can detect by an unaided eye be full of cracks process, percolation law and settling amount, Binding experiment Instrument measuring, synthetic study.Comparatively field trial is more accurate, easy to operate, and experimental cost reduces greatly.Large compared with laboratory, be widely used, and closer to field soil body actual conditions.By the combination of two kinds of experiments, study the relation of different seepage flow condition and settlement by soaking sedimentation.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. loess increase and decrease green deformation process simulation experimental provision, it is characterized in that, comprise cylindrical shell (1), base (2), heating arrangement (3), detection instrument (4) and data acquisition unit (5), heating arrangement (3) is provided with in base (2), base (2) is provided with cylindrical shell (1), cylindrical shell (1) inside is provided with detection instrument (4), detection instrument (4) external data collector (5); Described cylindrical shell (1) comprises inner core (11) and urceolus (12), water is marked with between inner core (11) and urceolus (12), inner core (11) is built with soil sample, (11) are provided with vertical rule with urceolus, the stack shell of cylindrical shell (1) is distributed with two vertical setting of types circular holes, the angle between two vertical setting of types is 135 °; Described inner core (11) bottom sidewall is also provided with the circular hole of the distribution in plum blossom-shaped.
2. loess increase and decrease green deformation process simulation experimental provision according to claim 1, it is characterized in that, described base (2) comprises cement tub (21), steel substrate (22), angle sheave (23) and handrail (24), cement tub (21) is provided with between steel substrate (22) and cylindrical shell (1), heating arrangement (3) is also provided with between cement tub (21), steel substrate (22), steel substrate (22) bottom is provided with angle sheave (23), and steel substrate (22) side is fixed with handrail (24).
3. loess increase and decrease green deformation process simulation experimental provision according to claim 1, it is characterized in that, described heating arrangement (3) is separable portable electric stone or metal plate for standing a stove on as a precaution against fire.
4. loess increase and decrease green deformation process simulation experimental provision according to claim 1, it is characterized in that, described detection instrument (4) is moisture probe, tension probe and foil gauge, moisture probe, tension probe are embedded in the different depth position of soil sample respectively by the circular hole of two vertical setting of types on cylindrical shell (1), and foil gauge is arranged on the surface of soil sample.
5. loess increase and decrease green deformation process simulation experimental provision according to claim 1, it is characterized in that, described data acquisition unit (5) adopts the EM50 data acquisition unit of Beijing genome company.
6. loess increase and decrease green deformation process simulation experimental provision according to claim 1, it is characterized in that, described cylindrical shell (1) adopts acrylic cylindrical shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420610090.1U CN204154610U (en) | 2014-10-12 | 2014-10-12 | Loess increase and decrease green deformation process simulation experimental provision |
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| CN201420610090.1U CN204154610U (en) | 2014-10-12 | 2014-10-12 | Loess increase and decrease green deformation process simulation experimental provision |
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| CN204154610U true CN204154610U (en) | 2015-02-11 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784564A (en) * | 2016-03-24 | 2016-07-20 | 青岛理工大学 | Improved double-ring infiltration process visual test device and test method thereof |
| CN105954499A (en) * | 2016-06-26 | 2016-09-21 | 兰州理工大学 | Method and device for evaluating collapsible site after carrying out fracturing grouting reinforcement on collapsible loess site |
| CN106596268A (en) * | 2017-01-23 | 2017-04-26 | 长安大学 | Multi-soaking condition simulation test model box and test method thereof |
| RU178608U1 (en) * | 2017-08-01 | 2018-04-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный технический университет" | DEVICE FOR CONTROL OF MOISTURE OF SOIL |
| CN108956414A (en) * | 2018-04-25 | 2018-12-07 | 长安大学 | A kind of sponge urban biology is detained facility model experimental rig and method |
| CN110308674A (en) * | 2019-05-28 | 2019-10-08 | 云南农业大学 | The measurement method of moisture penetration rule in a kind of mountain plateau red soil |
| CN110672497A (en) * | 2019-11-08 | 2020-01-10 | 宁夏大学 | Multifunctional infiltration piping tester |
| CN110887766A (en) * | 2019-11-01 | 2020-03-17 | 中国石油化工股份有限公司石油勘探开发研究院 | Compact gas-seal-layer mining fluid-solid coupling gas-water nonlinear seepage experimental device and method |
| CN112763692A (en) * | 2020-12-30 | 2021-05-07 | 长沙学院 | Slope wet swelling opposite sex characteristic test device and method under dynamic water environment |
| CN112858633A (en) * | 2021-01-14 | 2021-05-28 | 三门峡职业技术学院 | Large-thickness collapsible loess humidifying deformation experimental device |
| WO2021120366A1 (en) * | 2019-12-19 | 2021-06-24 | 中南大学 | Device for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state |
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2014
- 2014-10-12 CN CN201420610090.1U patent/CN204154610U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784564A (en) * | 2016-03-24 | 2016-07-20 | 青岛理工大学 | Improved double-ring infiltration process visual test device and test method thereof |
| CN105784564B (en) * | 2016-03-24 | 2019-04-19 | 青岛理工大学 | A kind of improvement double-ring infiltration process visualization experimental rig and method |
| CN105954499A (en) * | 2016-06-26 | 2016-09-21 | 兰州理工大学 | Method and device for evaluating collapsible site after carrying out fracturing grouting reinforcement on collapsible loess site |
| CN106596268A (en) * | 2017-01-23 | 2017-04-26 | 长安大学 | Multi-soaking condition simulation test model box and test method thereof |
| RU178608U1 (en) * | 2017-08-01 | 2018-04-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный технический университет" | DEVICE FOR CONTROL OF MOISTURE OF SOIL |
| CN108956414A (en) * | 2018-04-25 | 2018-12-07 | 长安大学 | A kind of sponge urban biology is detained facility model experimental rig and method |
| CN110308674A (en) * | 2019-05-28 | 2019-10-08 | 云南农业大学 | The measurement method of moisture penetration rule in a kind of mountain plateau red soil |
| CN110887766A (en) * | 2019-11-01 | 2020-03-17 | 中国石油化工股份有限公司石油勘探开发研究院 | Compact gas-seal-layer mining fluid-solid coupling gas-water nonlinear seepage experimental device and method |
| CN110887766B (en) * | 2019-11-01 | 2022-05-06 | 中国石油化工股份有限公司石油勘探开发研究院 | Compact gas-seal-layer mining fluid-solid coupling gas-water nonlinear seepage experimental device and method |
| CN110672497A (en) * | 2019-11-08 | 2020-01-10 | 宁夏大学 | Multifunctional infiltration piping tester |
| WO2021120366A1 (en) * | 2019-12-19 | 2021-06-24 | 中南大学 | Device for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state |
| CN112763692A (en) * | 2020-12-30 | 2021-05-07 | 长沙学院 | Slope wet swelling opposite sex characteristic test device and method under dynamic water environment |
| CN112858633A (en) * | 2021-01-14 | 2021-05-28 | 三门峡职业技术学院 | Large-thickness collapsible loess humidifying deformation experimental device |
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Granted publication date: 20150211 Termination date: 20151012 |
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