CN103698491B - The device without unsaturated soil soil-water characteristic curve under the limit condition of side is measured for dialysis - Google Patents
The device without unsaturated soil soil-water characteristic curve under the limit condition of side is measured for dialysis Download PDFInfo
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- CN103698491B CN103698491B CN201310645618.9A CN201310645618A CN103698491B CN 103698491 B CN103698491 B CN 103698491B CN 201310645618 A CN201310645618 A CN 201310645618A CN 103698491 B CN103698491 B CN 103698491B
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Abstract
The present invention is used for the device of dialysis measurement without unsaturated soil soil-water characteristic curve under the limit condition of side, comprise interior steel loop, outer steel loop, permeable stone, semi-permeable diaphragm, rubber ring and latex film, inside and outside steel loop is bolted, outer steel loop center arranges permeable stone, arranges three road rubber rings for sealing between inside and outside steel loop; The latex film two ends that sample is housed be each passed through two interior steel loop center holes and be instead enclosed within outside interior steel loop, fix latex film two ends with the outside rubber ring of interior steel loop, semi-permeable diaphragm is placed between inside and outside steel loop, utilizes bolt to be clamped by inside and outside steel loop.The present invention can utilize dialysis to carry out without the mensuration of relation between water percentage and suction under the limit condition of side to the uneven unsaturated soil sample of large-size, make up existing method and only can measure deficiency compared with small sample, can be used for measuring uneven unsaturated soil soil-water characteristic curve, for the association area such as Geological Engineering, Geotechnical Engineering provides unsaturated soil parameter.
Description
Technical field
The invention belongs to Geological Engineering, Geotechnical Engineering field, especially relate to a kind of for the device of dialysis measurement without unsaturated soil soil-water characteristic curve under the limit condition of side.
Background technology
Soil-water characteristic curve (Soil-Water Characteristic Curve, be called for short SWCC) be soil is described in unsaturated soils theory unsaturated state on an important tool of its waterpower, mechanical characteristic impact, its position in " water cut-suction " space and shape can reflect the feature (size of hole and the regularity of distribution) of native mesoporosity structure and the moisture holding capacity of soil; Many research fields in unsaturated soils theory, as strength theory, seepage theory, consolidation theory, constitutive theoryr all relate to the application of SWCC.At present existing method is measured the easiest and conventional in SWCC bargain-hunting power value (being less than 2MPa) part is dialysis, but, dialysis was measured unsaturated soil sample soil-water characteristic curve and is often directly used semi-permeable diaphragm to be wrapped up by sample to put into predetermined concentration polyglycol (PEG) solution and carry out suction equalization thus obtain the relation between unsaturated soil water percentage and suction in the past, but because the restriction being subject to semi-permeable diaphragm size cannot be tested large-size, therefore when unsaturated soil sample homogeneity is poor, because the difference of sample position often cannot obtain authentic and valid test findings.
Summary of the invention
The object of the invention is a kind ofly to measure device without unsaturated soil soil-water characteristic curve under the limit condition of side for dialysis in order to what overcome that above-mentioned technological deficiency provides.
Object of the present invention can be achieved through the following technical solutions:
A kind of for the device of dialysis measurement without unsaturated soil soil-water characteristic curve under the limit condition of side, it is characterized in that, a pair retaining element that this device comprises soil sample, latex film and mutually places axisymmetricly, described soil sample is measurand and is made into right cylinder, right cylinder soil sample is stuffed in resilient sleeve shaped latex film, and be placed between two retaining elements
Described each retaining element comprises outer steel loop, permeable stone, interior steel loop and semi-permeable diaphragm, and described permeable stone is arranged in outer steel loop intracardiac, and described semi-permeable diaphragm is placed between inside and outside steel loop as the key feature of proving installation,
By adopting seal approach to ensure the leakproofness between inside and outside steel loop in its surface of contact between the two between described inside and outside steel loop,
The two ends of described flexible sleeve shaped latex film are each passed through the interior steel loop center hole of its each avris, and stretch out in inside and outside steel loop gap and its outer portion is counter is enclosed within interior steel loop outside surface, adopt rubber ring clamping to limit at described anti-cover place, airtight to ensure;
Axially by bolt, outer steel loop, semi-permeable diaphragm, interior steel loop being clamped of whole device.
Described " by adopting seal approach in its surface of contact between the two between inside and outside steel loop ", be designed specifically to: some roads are set in surface of contact between inside and outside steel loop and close rubber ring, be equipped with some corresponding annular grooves for fixing described each rubber ring at inside and outside steel loop connecting portion simultaneously.
So, in this device, between soil sample and external environment condition, the interchange channel of hydrone is defined as: permeable stone--semi-permeable diaphragm--soil sample.Need to carry out vacuumizing and exhausting before apparatus of the present invention experiment, measurand sample need make cylindric and diameter equals latex film internal diameter in device.
Use of the present invention: sample is made cylindric and diameter equals latex film internal diameter, utilization holds film cylinder by emulsion film a set of outside sample, the latex film two ends that sample is housed are each passed through two interior steel loop center holes, and to stretch out in inside and outside steel loop gap and its outer portion is counter is enclosed within interior steel loop outside surface, anti-cover place adopts rubber ring clamping to limit, semi-permeable diaphragm is placed between inside and outside steel loop, utilizes bolt outer steel loop, semi-permeable diaphragm and interior steel loop to be clamped.Put into predetermined concentration polyglycol (PEG) solution after vacuumizing and exhausting is carried out to whole device and carry out suction equalization.
Sample loads in latex film by the present invention, utilizes two ends steel loop sealing to make it only carry out hydraulic connection by two ends semi-permeable diaphragm and the external world, overcomes original method and directly uses semi-permeable diaphragm parcel sample to cause sample size to be subject to the restriction of semi-permeable diaphragm size.Simultaneously because the present invention uses latex film parcel in sample radial direction, without being rigidly connected between the steel loop of axial two ends, therefore Free Transform can be carried out when sample has swelling property and unfettered realization limits condition without side.Therefore the present invention can be used for measuring the uneven unsaturated soil soil-water characteristic curve (SWCC) of large-size, for the association area such as Geological Engineering, Geotechnical Engineering provides unsaturated soil parameter, has higher scientific research, practical value.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present invention;
Fig. 2 is inside and outside steel loop structural representation of the present invention;
Fig. 3 is device using method schematic diagram of the present invention;
In Fig. 1,1 is interior steel loop, and 2 is outer steel loop, and 21 is permeable stone, and 3 is bolt, and 4 is rubber ring, and 5 is latex film, and 6 is test soil sample.
In Fig. 2,1 is interior steel loop, circular hole centered by 11, and 12 is bolt hole, and 13 is rubber ring, and 14 is semi-permeable diaphragm, and 2 is outer steel loop, and 21 is permeable stone, and 22 is bolt hole, and 23 is rubber ring, and 4 is rubber ring.
In Fig. 3,7 is that apparatus of the present invention are overall, and 8 is predetermined concentration polyglycol (PEG) solution, and 9 is beaker.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
In specific embodiment, by arranging seal approach to ensure the leakproofness between inside and outside steel loop in its surface of contact between the two between inside and outside steel loop, be designed specifically to: three road rubber rings are set between inside and outside steel loop for sealing: be designed with a groove at interior steel loop surface of contact, steel loop surface of contact is designed with two to groove outside; Meanwhile, be designed with a slat gum circle at interior steel loop surface of contact, steel loop surface of contact is designed with two slat gum circles outside, and as shown in Figure 2, in rubber ring press-in groove, groove is used for outside the rubber ring of better fixing correspondence.Two slat gum circles are arranged on outer steel loop surface, and its rubber ring 23 diameter value size is unequal; Be fixed on interior steel loop surface together, its rubber ring 13 diameter value mediates value, as shown in Figure 2.
As shown in Figure 1, a pair retaining element that apparatus of the present invention comprise soil sample 6, latex film 5 and mutually place axisymmetricly, described soil sample is that measurand is made into right cylinder, and cylindrical soil sample is stuffed in resilient sleeve shaped latex film 5, and be placed between two retaining elements
Described each retaining element comprises outer steel loop 2, permeable stone 21, interior steel loop 1 and semi-permeable diaphragm 14, and described permeable stone is arranged in outer steel loop intracardiac, and described semi-permeable diaphragm is placed between inside and outside steel loop as the key feature of proving installation,
By arranging three seals measure to ensure the leakproofness between inside and outside steel loop in its surface of contact between the two between described inside and outside steel loop,
The two ends of described flexible sleeve shaped latex film are each passed through the interior steel loop center hole of its each avris, and stretch out in inside and outside steel loop gap and its outer portion is counter is enclosed within interior steel loop outside surface, adopt rubber ring 4 to step up to limit at described anti-cover place;
Outer steel loop 2, semi-permeable diaphragm 14, interior steel loop 1 are clamped by bolt 3 by the axis of whole device.
Described inside and outside steel loop and bolt 3 are made by 738 mould stainless steels.Described permeable stone 21 is experiment high osmosis permeable stone.
First sample 6 is made cylindric and diameter equals latex film 5 internal diameter when device uses, utilization is held film cylinder and is enclosed within outside sample 6 by latex film 5, latex film 5 two ends that sample 6 is housed be each passed through two interior steel loop 1 center holes 11 and stretch out in inside and outside steel loop gap and its outer portion is counter is enclosed within interior steel loop 1 outside surface, anti-cover place clamps with the outside rubber ring 4 of interior steel loop 1 and limits latex film 5 two ends, semi-permeable diaphragm 14 is placed between interior steel loop 1 and outer steel loop 2, bolt 3 is each passed through bolt hole 12,22 and interior steel loop 1, semi-permeable diaphragm 14 is clamped with outer steel loop 2.Put into the beaker 9 that predetermined concentration polyglycol (PEG) solution 8 is housed after vacuumizing and exhausting is carried out to whole device 7 and carry out suction equalization, as shown in Figure 3.
Claims (2)
1. measure without the device of unsaturated soil soil-water characteristic curve under the limit condition of side for dialysis for one kind, it is characterized in that, a pair retaining element that this device comprises soil sample, latex film and mutually places axisymmetricly, described soil sample is that measurand is made into right cylinder, cylindrical soil sample is stuffed in resilient sleeve shaped latex film, and be placed between two retaining elements
Described each retaining element comprises outer steel loop, permeable stone, interior steel loop and semi-permeable diaphragm, and described permeable stone is arranged in outer steel loop intracardiac, and described semi-permeable diaphragm is placed between inside and outside steel loop as the key feature of proving installation,
By adopting seal approach to ensure the leakproofness between inside and outside steel loop in its surface of contact between the two between described inside and outside steel loop,
The two ends of described flexible sleeve shaped latex film are each passed through the interior steel loop center hole of its each avris, and stretch out in inside and outside steel loop gap and its outer portion is counter is enclosed within interior steel loop outside surface, adopt rubber ring to step up to limit at described anti-cover place;
Axially by bolt, outer steel loop, semi-permeable diaphragm, interior steel loop being clamped of whole device.
2. device as claimed in claim 1, it is characterized in that, described " by adopting seal approach in its surface of contact between the two between inside and outside steel loop ", be designed specifically to: some roads are set in surface of contact between inside and outside steel loop and close rubber ring, be equipped with some corresponding annular grooves for fixing described each rubber ring at inside and outside steel loop connecting portion simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310645618.9A CN103698491B (en) | 2013-12-05 | 2013-12-05 | The device without unsaturated soil soil-water characteristic curve under the limit condition of side is measured for dialysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310645618.9A CN103698491B (en) | 2013-12-05 | 2013-12-05 | The device without unsaturated soil soil-water characteristic curve under the limit condition of side is measured for dialysis |
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| Publication Number | Publication Date |
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| CN103698491A CN103698491A (en) | 2014-04-02 |
| CN103698491B true CN103698491B (en) | 2015-08-19 |
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| CN201310645618.9A Expired - Fee Related CN103698491B (en) | 2013-12-05 | 2013-12-05 | The device without unsaturated soil soil-water characteristic curve under the limit condition of side is measured for dialysis |
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| CN108414715A (en) * | 2018-04-08 | 2018-08-17 | 中国地质调查局西安地质调查中心 | A kind of field original position river is to underground water pollution monitoring method |
| CN111487106B (en) * | 2020-06-02 | 2021-09-10 | 东北大学 | Unsaturated rock uniaxial creep test device in constant humidity environment and use method |
| CN115979880B (en) * | 2022-11-25 | 2023-06-20 | 中国矿业大学 | Device and method for testing near-surface soil water retention curve under low-stress environment |
| CN115541851B (en) * | 2022-11-28 | 2023-04-07 | 深圳大学 | Unsaturated soil multi-field coupling water holding capacity measuring method and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201340382Y (en) * | 2009-01-23 | 2009-11-04 | 长安大学 | Soil-water characteristic curve testing arrangement for cohesionless soil |
| CN102680665A (en) * | 2012-06-11 | 2012-09-19 | 长安大学 | Suction accurately controlled pressure plate instrument capable of directly saturating soil sample |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7412875B2 (en) * | 2004-12-08 | 2008-08-19 | Board Of Regents, The University Of Texas System | Centrifuge permeameter for unsaturated soils system |
| US7367218B2 (en) * | 2005-12-08 | 2008-05-06 | Board Of Regents, The University Of Texas System | Centrifuge permeameter for unsaturated soils system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201340382Y (en) * | 2009-01-23 | 2009-11-04 | 长安大学 | Soil-water characteristic curve testing arrangement for cohesionless soil |
| CN102680665A (en) * | 2012-06-11 | 2012-09-19 | 长安大学 | Suction accurately controlled pressure plate instrument capable of directly saturating soil sample |
Non-Patent Citations (2)
| Title |
|---|
| 叶为民等.温控高压实GMZ01膨润土-砂混合物土水特性.《工程地质学报》.2013,第21卷(第3期),第385-390页, 图1a-b. * |
| 非饱和土的土—水特征曲线的试验研究及应用;刘翠然等;《云南水力发电》;20051231;第21卷(第1期);第11－15页,图1 * |
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