CN86210083U - Soil hydraulic-cleavage-strength measuring meter - Google Patents
Soil hydraulic-cleavage-strength measuring meter Download PDFInfo
- Publication number
- CN86210083U CN86210083U CN 86210083 CN86210083U CN86210083U CN 86210083 U CN86210083 U CN 86210083U CN 86210083 CN86210083 CN 86210083 CN 86210083 U CN86210083 U CN 86210083U CN 86210083 U CN86210083 U CN 86210083U
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- China
- Prior art keywords
- test specimen
- pressure
- soil
- measure sample
- cleavage
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- Expired - Lifetime
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Abstract
The utility model discloses a soil hydraulic-cleavage-strength measuring meter, which is formed by making the following two improvements to the already existed meter of the same type. The hollow cavity of a hollow circular cylinder soil measure sample is no longer filled with the fine sand or other permeable materials, and is replaced by the arrangement of a pressure bladder; the pressure value can be regulated at will, and therefore, the measure sample has the definite initial stress condition. In addition, the inner surface of the hollow cavity of the measure sample and the outer surface of the measure sample are both provided with flexible drainage layers, and therefore, the surface of the measure sample is in the stable seepage condition. Therefore, the utility model can be used to carry out the strict dynamics mechanism analysis for the destruction of the soil hydraulic-cleavage-strength.
Description
The utility model belongs to soil hydraulic fracture surveying instrument.
At present domestic and international existing same quasi-instrument, hollow garden post soil test specimen (1) (hereinafter to be referred as test specimen), cover are with elastic membrane (21), and the two ends envelope is filled out with sand or other seepy materials in the cavity (25) of test specimen (1) with waterproof plate (3) and (26).During test, test specimen (1) is placed in the hydraulic pressure chamber (23) the confined pressure power σ of test specimen (1)
3Provide pressure at right angle σ by hydraulic pressure chamber (23)
1Provide by the piston rod that passes hydraulic pressure chamber (23) (24), it has constituted the initial stress state of test specimen (1), by in the cavity (25) of test specimen (1), applying water pressure, and improve constantly the water pressure value, until test specimen (1) hydraulic fracture takes place and destroy, institute adds the water pressure value when writing down destruction.
The weak point of above-mentioned prior art is, the first, owing to filled seepy material such as sand etc. in the cavity (25), and sand is different with the elastic modulus of test specimen (1), at the confined pressure power σ of test specimen (1)
3And pressure at right angle σ
1Effect makes the section primary stress of test specimen (1) indeterminate down; Second, because test specimen (1) cover is with rubber membrane (21), seepage flow state labile during the therefore impeded drainage of test specimen (1) outer boundary, so test specimen (1) cavity (25) interior water infiltrate test specimen (1) section can't strictly be analyzed the influence that infiltration power is adjusted test specimen (1) section stress.Therefore, utilize the existing hydraulic fracture water pressure U that records with quasi-instrument
IfValue is qualitative results just, is difficult to carry out in view of the above quantitative mechanical mechanism analysis.
The utility model is exactly the deficiency at above-mentioned prior art, provides a kind of novel soil hydraulic fracture to measure instrument, and it is improved by prior art and forms.This instrument is by the sample assembly, waterproof plate (3) (26), hydraulic pressure chamber (23) and force transmission mechanism are formed up and down, the sample assembly comprises hollow garden column soil test specimen (1) and is enclosed within the elastic membrane (21) of its outside, it is characterized in that, in the cavity (25) of test specimen (1) pressure bladder (2) is set, between the inside surface of test specimen (1) and the pressure bladder (2), between the outside surface of test specimen (1) and the elastic membrane (21) flexible water drainage layer (22) is set.
Owing to take pressure bladder (2) to replace sand, make test specimen (1) section that clear and definite initial stress state just arranged, again owing to be provided with the flexible water drainage layer, make the inside and outside draining at the interface of test specimen (1) unobstructed, form stable seepage flow state, thereby can be quantitatively carry out strict mechanical mechanism analysis, undoubtedly, the development of soil waterpower cleavage fracture theory be played good impetus soil waterpower cleavage fracture.
Below in conjunction with accompanying drawing, introduce an embodiment of the present utility model, Fig. 1 is the utility model--the soil hydraulic fracture measures the sectional view of instrument, above-mentioned pressure bladder (2), what adopt here is the pressure rubber pocket, this pressure rubber pocket is connected with the pipeline (4) through waterproof plate (3), through valve (5) (6) (7) (8), receive again on the pressure buret (9) (10), the interior water pressure of water pressure in the pressure rubber pocket and pressure buret (9) (10) equates, regulate by pressure regulator valve (11), it can be equal to or less than confined pressure power σ
3Water pressure in test specimen (1) cavity (25) sends by pipeline (12), pipeline (12) is connected with pressure buret (18) (19) through valve (13) (14) (15) (16) and (17), pass through pressure regulator valve (20) in the test, pressure in the continuous rising pressure buret (18) (19) is up to the U that produces hydraulic fracture
IfValue.Above-mentioned in addition flexible water drainage layer (22), usefulness is the foaming water discharge layer here, makes the draining smoothness, the water of discharge is exactly the water that oozes out through the test specimen section, is measured by buret (27) and (28).
Utilize the utility model, owing to adopted pressure bladder, make test specimen (1) section that clear and definite initial stress state arranged, again owing to adopted the flexible water drainage layer, can form stable seepage flow state, quantitatively soil waterpower cleavage fracture be carried out strict mechanical mechanism analysis and be achieved thereby make.
Simple declaration about accompanying drawing:
Fig. 1 is the utility model---the sectional view of soil hydraulic fracture measuring instrument
1.---test specimen, 2.---and pressure bladder, 3 and 26---waterproof plate,
4,12---pipeline, 5,6,7,8---valve, 9,10---the pressure buret,
11.---pressure regulator valve, 13,14,15,16,17---valve,
18,19---pressure buret 20---pressure regulator valve
21.---elastic membrane, 22.---the flexible water drainage layer,
23.---hydraulic pressure chamber, 24.---piston rod,
25.---cavity, 27,28---buret.
Claims (1)
- The instrument that a kind of measured soil hydraulic fracture destroys, by sample assembly, waterproof plate [3] up and down, [26], hydraulic pressure chamber [23] and force transmission mechanism are formed, the sample assembly comprises hollow garden column soil test specimen [1] and is enclosed within the elastic membrane [21] of its outside surface, it is characterized in that in the cavity [25] of test specimen [1] pressure bladder [2] being set, between the inside surface of test specimen [1] and the pressure bladder [2], between the outside surface of test specimen [1] and the elastic membrane [21] flexible water drainage layer [22] is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86210083 CN86210083U (en) | 1986-12-13 | 1986-12-13 | Soil hydraulic-cleavage-strength measuring meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86210083 CN86210083U (en) | 1986-12-13 | 1986-12-13 | Soil hydraulic-cleavage-strength measuring meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86210083U true CN86210083U (en) | 1987-11-07 |
Family
ID=4811836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86210083 Expired - Lifetime CN86210083U (en) | 1986-12-13 | 1986-12-13 | Soil hydraulic-cleavage-strength measuring meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86210083U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841020A (en) * | 2012-09-06 | 2012-12-26 | 中国水利水电科学研究院 | Test model and method for simulating capacity of resisting cracking caused by high-pressure water of flexible impermeable material |
| CN103389249A (en) * | 2013-07-18 | 2013-11-13 | 河海大学 | Device and method for clay core wall hydraulic fracturing experiments |
| CN103776703A (en) * | 2014-01-24 | 2014-05-07 | 山东大学 | Hydro-fracturing water injection loading device based on rock-like resin sample and test method |
| CN104865131A (en) * | 2015-04-21 | 2015-08-26 | 同济大学 | Bentonite hydraulic fracturing feature determination device |
-
1986
- 1986-12-13 CN CN 86210083 patent/CN86210083U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841020A (en) * | 2012-09-06 | 2012-12-26 | 中国水利水电科学研究院 | Test model and method for simulating capacity of resisting cracking caused by high-pressure water of flexible impermeable material |
| CN102841020B (en) * | 2012-09-06 | 2015-06-10 | 中国水利水电科学研究院 | Test model and method for simulating capacity of resisting cracking caused by high-pressure water of flexible impermeable material |
| CN103389249A (en) * | 2013-07-18 | 2013-11-13 | 河海大学 | Device and method for clay core wall hydraulic fracturing experiments |
| CN103389249B (en) * | 2013-07-18 | 2015-08-05 | 河海大学 | A kind of clay core wall Hydraulic fracturing test device and test method |
| CN103776703A (en) * | 2014-01-24 | 2014-05-07 | 山东大学 | Hydro-fracturing water injection loading device based on rock-like resin sample and test method |
| CN103776703B (en) * | 2014-01-24 | 2015-11-18 | 山东大学 | Based on hydrofracturing water filling charger and the test method of rocks resin test specimen |
| CN104865131A (en) * | 2015-04-21 | 2015-08-26 | 同济大学 | Bentonite hydraulic fracturing feature determination device |
| CN104865131B (en) * | 2015-04-21 | 2017-11-07 | 同济大学 | A kind of measure device of bentonite hydraulic fracture characteristic |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |