CN2456151Y - Determiner for soil surface shearing strength - Google Patents
Determiner for soil surface shearing strength Download PDFInfo
- Publication number
- CN2456151Y CN2456151Y CN 00267031 CN00267031U CN2456151Y CN 2456151 Y CN2456151 Y CN 2456151Y CN 00267031 CN00267031 CN 00267031 CN 00267031 U CN00267031 U CN 00267031U CN 2456151 Y CN2456151 Y CN 2456151Y
- Authority
- CN
- China
- Prior art keywords
- weight
- soil
- soil surface
- shear strength
- heavy object
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a measuring device for the shearing strength of the soil surface. The utility model is characterized in that a heavy object is placed horizontally on the surface of the soil to be measured, the lower surface of the heavy object is provided with abrasive paper which is used for shearing media, and a pull cord used for pulling the heavy object is fixed to one side of the heavy object; after the pull cord passes through a pulley, the other end of the pull cord is tied to a water bottle, the pull cord is provided with a ruler, and the weight of the water bottle is equal to the weight of the heavy object. The new device provided by the utility model can overcome the defects that the defining of a shearing fracture surface is not easy in the prior art, etc., and can well simulate the interconnecting action of the surface soil coacervate with the thickness of 2mm or the interconnecting action among soil granules, and measuring results have good repeatability.
Description
The utility model relates to a kind of determinator of shear strength of soil surface.
The soil erosion and soil crust are to one of factor of agricultural and environmental hazard maximum.In the process of rainfall, the raindrop impact ground and the face of land, the water movement that has silt can produce bigger shearing force, causes the local soil in the soil erosion process to destroy.Meanwhile, the soil layer of the high unit weight of face of land formation 1-10mm and low-porosity, low hydraulic conductivity improves the intensity of this soil layer.Soil educational circles has the people to propose to represent the resistance that the soil opposing is corroded with shear strength of soil surface, and therefore in the research work of pedology, the mensuration of shear strength of soil surface is one of big event.The method of measuring shear strength of soil surface in the prior art has following several traditional equipment or method: the one, and the tapered instrument that penetrates; The 2nd, the spiral boxshear apparatus; The 3rd, the torsional shear box; Also has the direct shear method.But the precision that these apparatus and method measurement results are reached all can not be explained the required parameter of erosion process topsoil intensity.Newer achievement in research is Collis-George et al in 1993 annual reports " resinous flat method ": resin is injected soil surface, it is solidified, the pulling soil block of having solidified is measured the required power of pulling then, can determine shear strength of soil surface.This method is simple and efficient, good reproducibility, and also experimental expenses is cheap.But the weak point of this method is to be difficult for definition shear fracture face, therefore calculates the shear area difficulty.Simultaneously, during casting resin, around resin plate, form tension crack and way fracture easily.Continuing to seek a kind of desirable soil shear strength measurement method and device, is the needs of the soil erosion and soil crust research.
The purpose of this utility model provides a kind of new equipment of measured soil surface strength parameter, and new equipment can be simulated the interconnected effect between 2mm thick surface soil aggregate or the soil particle, thereby measures from sandy soil to the clay resistance of soil of differing texture.Its measurement result should have good repeatability, and its result should meet the soil weight and the water cut theoretical analysis to the resistance of soil parameter influence.
In order to finish the foregoing invention task, the application provides a kind of determinator of new shear strength of soil surface, the primary structure of this device is: a weight that lies in a horizontal plane in tested soil surface, lower surface at this weight is provided with as the sand paper of shearing medium, side at weight is fixed with the backguy that spurs this weight, and backguy is behind pulley, and there is water bottle in system at the other end, backguy is provided with scale, and the weight of water bottle equates with weight of heavy.Here the floorage of weight can be designed as the circle of diameter 6.8cm; The specification of sand paper is 30 particles cm
-2Normal stress is defined as: weight of heavy is designed to five levels of 2,5,8,10 and 20 hpa divided by its floorage.During water filling, the weight that water bottle increases gives weight with horizontal stress by backguy, and it is subjected to displacement in water bottle, when its displacement during greater than 10mm, stops water filling.At this moment the weight of water is the horizontal stress that records under the normal stress divided by the floorage of weight in the water bottle.For conversion weight of heavy easily, the design's prioritization scheme is: weight is served as by the heavy flat capsule of interior loading; For the convenience of water filling in water bottle, another prioritization scheme is: the water tank, pipeline and the valve that are provided with water filling in bottle.
The new equipment of the measured soil surface strength parameter that the utility model provides, overcome prior art and be difficult for deficiencies such as definition shear fracture face, can simulate the interconnected effect between 2mm thick surface soil aggregate or the soil particle well, with this device with penetrate instrument and measure from sandy soil to the clay, the resistance of soil of differing texture, its measurement result repeated fine, and the soil weight and water cut can use broken equation of Mohr-Coulomb ' s and effective pressure principle to explain to the resistance of soil parameter influence.In soil weight difference only is 0.01-0.09g cm
-3Situation under, measurement result still can show its influence to the resistance of soil parameter.
Now be described further with embodiment in conjunction with the accompanying drawings.
Fig. 1 is embodiment 1 an apparatus structure synoptic diagram.
Embodiment 1, the determinator of shear strength of soil surface, and with reference to Fig. 1: a diameter is the flat plastics capsule 1 of 6.8cm, the interior loading weighs, lie in a horizontal plane in the surface of tested soil 2, be provided with as the sand paper of shearing medium at the lower surface of this capsule, the specification of sand paper is 30 particles cm
-2Side at capsule is fixed with the backguy 6 that spurs this weight through spring 3, and backguy is behind pulley 5, and system has water bottle 9, backguy to be provided with scale and counterweight 4 at the other end, and the weight of water bottle equates with weight of heavy.At the water tank 7 that is provided with water filling in bottle above the water bottle, pipeline and valve 8.Normal stress is defined as: the weight of capsule load-carrying is designed to five levels of 2,5,8,10 and 20 hpa divided by its floorage.During water filling, the weight that water bottle increases gives capsule with horizontal stress by backguy, and capsule is subjected to displacement in water bottle, when its displacement during greater than 10mm, stops water filling.At this moment the weight of water is the horizontal stress that records under the normal stress divided by the floorage of capsule in the water bottle.
Claims (6)
1, a kind of determinator of shear strength of soil surface, it is characterized in that: a weight that lies in a horizontal plane in tested soil surface, lower surface at this weight is provided with as the sand paper of shearing medium, be fixed with the backguy of this weight of pulling in a side of weight, backguy is behind pulley, there is water bottle in system at the other end, and backguy is provided with scale, and the weight of water bottle equates with weight of heavy.
2, according to the determinator of the described shear strength of soil surface of claim 1, it is characterized in that: said weight is the heavy flat capsule of interior loading.
3, according to the determinator of the described shear strength of soil surface of claim 1, it is characterized in that: the water tank, pipeline and the valve that also are provided with water filling in water bottle.
4, according to the determinator of claim 1 or 2 or 3 described shear strength of soil surface, it is characterized in that: said sand paper specification is 30 particles cm
-2
5, according to the determinator of claim 1 or 2 or 3 described shear strength of soil surface, it is characterized in that: the specification of the heavy capsule of said weight or interior loading is circle, diameter 6.8cm.
6, according to the determinator of the described shear strength of soil surface of claim 4, it is characterized in that: the specification of the heavy capsule of said weight or interior loading is circle, diameter 6.8cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00267031 CN2456151Y (en) | 2000-12-22 | 2000-12-22 | Determiner for soil surface shearing strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00267031 CN2456151Y (en) | 2000-12-22 | 2000-12-22 | Determiner for soil surface shearing strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2456151Y true CN2456151Y (en) | 2001-10-24 |
Family
ID=33620961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00267031 Expired - Fee Related CN2456151Y (en) | 2000-12-22 | 2000-12-22 | Determiner for soil surface shearing strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2456151Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386615C (en) * | 2005-09-23 | 2008-05-07 | 中国石油天然气股份有限公司 | Water bulk antishearing strength detecting instrument |
| CN105319134A (en) * | 2015-11-09 | 2016-02-10 | 航天晨光股份有限公司 | Shearing stiffness measurement device for metal hose |
-
2000
- 2000-12-22 CN CN 00267031 patent/CN2456151Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386615C (en) * | 2005-09-23 | 2008-05-07 | 中国石油天然气股份有限公司 | Water bulk antishearing strength detecting instrument |
| CN105319134A (en) * | 2015-11-09 | 2016-02-10 | 航天晨光股份有限公司 | Shearing stiffness measurement device for metal hose |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |