CN201273877Y - Measurement apparatus for maximum static friction coefficient of artificial fish reef - Google Patents
Measurement apparatus for maximum static friction coefficient of artificial fish reef Download PDFInfo
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- CN201273877Y CN201273877Y CNU200820153033XU CN200820153033U CN201273877Y CN 201273877 Y CN201273877 Y CN 201273877Y CN U200820153033X U CNU200820153033X U CN U200820153033XU CN 200820153033 U CN200820153033 U CN 200820153033U CN 201273877 Y CN201273877 Y CN 201273877Y
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- static friction
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Abstract
The utility model discloses a measurer for the coefficient of maximum static friction of artificial fish reef, which relates to the field of measuring technology. The measurer is used for measuring the coefficient of maximum static friction of the artificial fish reef, and comprises a flat plate, a measurement model and an angle measurer, wherein, the measurement model is used for carrying a reef body of the artificial fish reef; the angle measurer is arranged at a fixed (lower) end of the flat plate; the flat plate can rotate around the measuring center of the angle measurer; the upper surface of the flat plate is provided with a sand grain layer; a scale model of the reef body of the artificial fish reef is placed on the sand grain layer; and the lower part of the rotating (higher) end of the flat plate is supported by a press jack. The utility model has the characteristics that the accuracy of the technical parameter measurement of the artificial fish reef is improved, the production period for manufacturing the artificial fish reef is shortened, and the production cost of the artificial fish reef is reduced.
Description
Technical field
The utility model relates to measuring technique, particularly relates to the measuring technique of a kind of artificial marine habitat reefs and sea bottom surface coefficient of maximum static friction.
Background technology
Artificial marine habitat is to throw in marine, is used to improve the manual construction thing of marine site ecologic environment, propagation fishery resources.Up to now, the research of artificial marine habitat and construction have been brought into play better effects in the existing nearly 30 years history of China to coastal waters ecologic environment reparation and fishery resources propagation.But, China's artificial marine habitat construction at present rests on the foreign imitation experience mostly or directly uses the level of foreign study achievement, still lack effective support of gordian technique, as the reefs antiskid corresponding to marine site ecologic environment characteristics move, antidumping, anti-depression and the anti-equistability technology of burying, thereby the selection that artificial marine habitat reefs shape, structure and material often occur is not suitable for China's marine site characteristics, cause in the reefs launch process topple over, engineering accident such as collision, drift both caused unnecessary economic loss, and can not fully produce due effect again.The lasting existence of this present situation is very unfavorable to the ongoing artificial marine habitat building cause of China.Therefore, reach the desired design purpose, reefs is carried out stability check particularly important for making artificial marine habitat performance maximum efficiency.
The artificial marine habitat construction is an engineering project that investment is bigger, millions of at least several at most ten million even more than one hundred million unit, so the research of carrying out science for the key technique that relates to security that project construction implements and reliability before construction is very necessary.And artificial marine habitat whether to have good stability be to be related to reefs to throw in the key technical index that can its function of back and effect obtain bringing into play.Thereby, before throwing in, artificial marine habitat at first to estimate its performance for stability in conjunction with the substrate sediment and the sea conditions in sea area, and the reefs type practical to guarantee is fit to the marine site actual state.
Artificial marine habitat is thrown in behind the seabed, is subjected to the influence of acting forces such as ripple, stream, the phenomenon of loses stability such as slippage can occur and topple.And judge whether fish shelter produces slippage, mainly be according under action of ocean current, whether occurring slip between fish shelter and the marine bottom sediment.Thereby grasping different reefs types is very crucial technical parameter with the sedimental friction factor of different substrates.Therefore, reefs is being carried out antiskid moves and antidumping when analyzing, normally utilizing the coefficient of maximum static friction conduct in reefs and seabed is most important parameter substantially the most also, and fish shelter stability is analyzed and judged.
Artificial marine habitat renders to after marine that it slippage takes place, topples, buries and produce often under current and wave long term.If take the method for seabed actual measurement, need in advance the artificial marine habitat that designs to be built, and render to corresponding sea area, carry out submarine observation then, be subjected to the restriction of production cost and production cycle, waste time and energy.And, cause the feasibility of seabed measurement method relatively poor because seabed situation complexity and artificial marine habitat reefs weight are bigger.And checked because not relevant measured data supports through corresponding stability before throwing in the past, the seabed coefficient of maximum static friction choose most employing empirical value only by virtue of experience formula carry out simple computation and judge, thereby check calculating for stability and bring very mistake, be difficult to dope the performance for stability of fish shelter, if the stability of artificial marine habitat can not guarantee, the performance of the function of artificial marine habitat will be had a strong impact on so, also can bring very big loss to the artificial marine habitat construction simultaneously.
The utility model content
At the defective that exists in the above-mentioned prior art, technical problem to be solved in the utility model provides a kind of accuracy that can improve the artificial marine habitat measurement of technical parameter, shorten the production cycle that artificial marine habitat is made, the measurement mechanism of the maximum static friction coefficient of artificial fish reef of the production cost of reduction artificial marine habitat
In order to solve the problems of the technologies described above, the measurement mechanism of a kind of maximum static friction coefficient of artificial fish reef provided by the utility model, it is characterized in that, measurement mechanism comprises a flat sheet, be used to carry the measurement model of artificial marine habitat reefs, fixing (low) end of flat sheet is established angel measuring instrument, flat sheet can be rotated around the measuring center of angel measuring instrument, the upper surface of flat sheet is provided with the sand grain layer, place the scaled down model of artificial marine habitat reefs to be measured on the sand grain layer, the bottom of the rotation of flat sheet (height) end is supported by pressing lifting jack.
Further, described lifting jack top is provided with calotte, is used for contacting with the steady of bottom of flat sheet.
Utilize the measurement mechanism and the method thereof of the maximum static friction coefficient of artificial fish reef that the utility model provides, owing to adopt analogue means conveniently to determine the friction factor of the actual construction of artificial marine habitat marine site bed mud on land to dissimilar fish shelters, thereby can be used as the foundation of reefs design and selection and reef section planning in the fish shelter construction plan stage, for the check of performance for stability in the artificial marine habitat construction provides the reliable technique parameter, improved the accuracy of measuring, shortened the production cycle that artificial marine habitat is made, reduce the production cost of artificial marine habitat, guaranteed the security that artificial marine habitat is built.
Description of drawings
Fig. 1 is the structural representation of the proving installation of the utility model embodiment.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.
By shown in Figure 1, the measurement mechanism of a kind of maximum static friction coefficient of artificial fish reef that the utility model embodiment is provided, it is characterized in that, measurement mechanism comprises a flat sheet 2, be used to carry artificial marine habitat reefs 4, fixing (low) end of flat sheet 2 is established angel measuring instrument 1, flat sheet 2 can be rotated around the measuring center of angel measuring instrument 1, the upper surface of flat sheet 2 is provided with sand grain layer 3, place the scaled down model 4 of artificial marine habitat reefs to be measured on the sand grain layer 3, the bottom of the rotation of flat sheet 2 (height) end is supported by pressing lifting jack 6, and the lifting jack top is provided with calotte 5, is used for contacting with the steady of bottom of flat sheet 2.
The preparation of the sand grain layer 3 of flat sheet 2: the seabed sand grain sample that on-site inspection sampling is obtained is tiled in is dried into bone dry or different water cut rate state in the electric heating constant temperature air dry oven in the glass dish.At the even brushing cementing agent in flat sheet 2 surfaces, the sand grain sample evenly is sieved to flat sheet 2 surfaces of brushing cementing agent with separating mesh screen, place a period of time, wait for that cementing agent and sample bonding is firm, form sand grain layer 3.
The measuring method of the measurement mechanism of the described maximum static friction coefficient of artificial fish reef of a kind of the utility model embodiment, its step comprises:
1) the scaled down model 4 of artificial marine habitat reefs to be measured is put down gently sand grain layer 3 surface in flat sheet 2;
2) press lifting jack 6, rotation (height) end of flat sheet 2 is risen, change the angle of inclination of flat sheet 2, when waiting to observe reefs model 4 tendency of slip being arranged, stop to press lifting jack 6, and read the numerical value of bevel angle θ this moment by the drift indicator 1 of both sides, inclined-plane respectively;
3) repeating step 1 repeatedly), 2) operation, try to achieve the mean value θ of tilt angle theta;
4) according to the formula between the mean value θ at coefficient of maximum static friction μ and angle of inclination, μ=tan θ can be in the hope of the coefficient of maximum static friction of the type reefs between this marine site and substrate.By installing calotte 6 additional at the lifting jack top, the bottom, inclined-plane is contacted with the lifting jack holding point, the assurance bevel angle rises and does not steadily undergo mutation.
The inclined plane method of taking when the measuring method of this friction factor is measured coefficient of maximum static friction according to classical physics.Pass between coefficient of maximum static friction μ and the inclined-plane level angle θ is μ=tan θ.
These apparatus and method can conveniently determine the friction factor of the actual construction of artificial marine habitat marine site bed mud to dissimilar fish shelters before the fish shelter construction, thereby can be used as the foundation of reefs design and selection and reef section planning in the fish shelter construction plan stage, for the check of performance for stability in the artificial marine habitat construction provides the reliable technique parameter, guaranteed the security that artificial marine habitat is built.
Claims (2)
1, a kind of measurement mechanism of maximum static friction coefficient of artificial fish reef, it is characterized in that, measurement mechanism comprises a flat sheet, be used to carry the measurement model of artificial marine habitat reefs, the stiff end of flat sheet is established angel measuring instrument, and flat sheet can be rotated around the measuring center of angel measuring instrument, and the upper surface of flat sheet is provided with the sand grain layer, place the scaled down model of artificial marine habitat reefs to be measured on the sand grain layer, the bottom of the rotation end of flat sheet is supported by pressing lifting jack.
2, the measurement mechanism of maximum static friction coefficient of artificial fish reef according to claim 1 is characterized in that, described lifting jack top is provided with calotte, is used for contacting with the steady of bottom of flat sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820153033XU CN201273877Y (en) | 2008-09-12 | 2008-09-12 | Measurement apparatus for maximum static friction coefficient of artificial fish reef |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820153033XU CN201273877Y (en) | 2008-09-12 | 2008-09-12 | Measurement apparatus for maximum static friction coefficient of artificial fish reef |
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| Publication Number | Publication Date |
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| CN201273877Y true CN201273877Y (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU200820153033XU Expired - Fee Related CN201273877Y (en) | 2008-09-12 | 2008-09-12 | Measurement apparatus for maximum static friction coefficient of artificial fish reef |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694678B (en) * | 2009-10-27 | 2011-07-13 | 上海海洋大学 | Method for measuring and calculating regulation scale of artificial fish shelter flow field |
| CN101650295B (en) * | 2008-09-12 | 2011-09-14 | 张硕 | Device and method for measuring maximum static friction coefficient of artificial fish reef |
| CN103091245A (en) * | 2012-12-17 | 2013-05-08 | 江苏大学 | Device and method for measuring poultry egg static friction coefficient |
-
2008
- 2008-09-12 CN CNU200820153033XU patent/CN201273877Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101650295B (en) * | 2008-09-12 | 2011-09-14 | 张硕 | Device and method for measuring maximum static friction coefficient of artificial fish reef |
| CN101694678B (en) * | 2009-10-27 | 2011-07-13 | 上海海洋大学 | Method for measuring and calculating regulation scale of artificial fish shelter flow field |
| CN103091245A (en) * | 2012-12-17 | 2013-05-08 | 江苏大学 | Device and method for measuring poultry egg static friction coefficient |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 |