CN103293287A - A two-point slope determination method for a navigable mud density - Google Patents
A two-point slope determination method for a navigable mud density Download PDFInfo
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- CN103293287A CN103293287A CN201310256008XA CN201310256008A CN103293287A CN 103293287 A CN103293287 A CN 103293287A CN 201310256008X A CN201310256008X A CN 201310256008XA CN 201310256008 A CN201310256008 A CN 201310256008A CN 103293287 A CN103293287 A CN 103293287A
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Abstract
The present invention discloses a two-point slope determination method for a navigable mud density, and the method comprises the following steps of: a) mixing an on-site collected mud sample with a sea water sample of a corresponding sea area to prepare samples with different densities, determining yield stresses of samples with different densities at different shear rates, and drawing a relation curve of the mud density and the yield stress; b) calculating the slope of the straight line between two adjacent points to obtain a series of slope values; and c) analyzing the obtained series of slope values, wherein the density value corresponding to the starting point of a slope abrupt change is employed as the navigable mud density of the test mud sample. By using the method, subjectivity from a tester can be eliminated, and more subjective navigable mud density can be obtained, improving navigable depth application security, and providing a more objective basis for the application navigable depth technologies, and at the same time, further standardizing the application study of navigable depth.
Description
Technical field
The present invention relates to a kind of definite method of seaworthiness mud severe value, particularly 2 slopes of a kind of seaworthiness mud severe value are determined method.
Background technology
Seaworthy water depth utilizes the part mud scum to use as the depth of water exactly.Seaworthy water depth application technology parameter comprises under the seaworthy water depth interface mud characterisitic parameter and seaworthy water depth measuring period, and wherein mud characterisitic parameter in interface adopts seaworthiness mud severe to represent under the seaworthy water depth.
We were when chief editor's " mud matter harbour seaworthy water depth application technology standard " in 2006, with reference to the method for determining seaworthiness mud severe value both at home and abroad, provided " bathmometry ", as follows: the mud sample that gather the enchashment field and the water sample in corresponding marine site are mixed with the sample of different severes, measure the yield stress of sample under different shearings rate of different severes, draw mud severe and yield stress relation curve respectively.The existing method of determining seaworthiness mud severe is: get the apparent in view corresponding mud severe of starting point (catastrophe point or flex point) of curvature variation on corresponding mud severe and the yield stress relation curve as seaworthiness mud severe.
But, the relation curve of mud severe and yield stress is generally the exponential relationship curve, in theory, this curve does not exist the catastrophe point of stricti jurise or flex point (just to know this problem when we write " standard ", but because there not being better method, can only be by everybody this method of adopting usually in the past).Therefore, it just can only be subjective judgement that the method for existing definite seaworthiness mud severe is namely looked for flex point from smooth curve, then everyone flex point judged just has big gap, more seriously, from visually, the what is called of curve " flex point " obviously is subjected to the influence of figure coordinate axle displaying ratio, as illustrated in fig. 1 and 2, same data, the vacation " flex point " that different figure coordinate axis scale shows just has very big difference, and different seaworthiness mud severe values is namely arranged, and the seaworthiness mud severe value of determining like this is objective inadequately, very big artificial property is arranged, and the while also brings bigger hidden danger to the application security of seaworthy water depth.Therefore need to propose a kind of method of more objectively determining, improve the security of using seaworthy water depth, in addition, this repaiies volume and also important meaning will be arranged " mud matter harbour seaworthy water depth application technology standard ".
Summary of the invention
The present invention provides 2 slopes of a kind of seaworthiness mud severe value to determine method for solving the technical matters that exists in the known technology, this method can be removed the subjective artificial property when determining seaworthiness mud severe, draws seaworthiness mud severe value more objective, that more gear to actual circumstances.
The technical scheme that the present invention takes for the technical matters that exists in the solution known technology is: 2 slopes of a kind of seaworthiness mud severe value are determined method, and step is as follows:
One) the mud sample of collection in worksite and the water sample in corresponding marine site are mixed with the sample of different severes, measure the yield stress of sample under different shearings rate of different severes, draw mud severe and yield stress relation curve;
Two) get 2 adjacent points successively, calculate the slope of point-to-point transmission straight line, draw a series of slope value;
Three) a series of slope value finishing analysis to drawing are got the slope mutation initiation and are put corresponding severe value as the seaworthiness mud severe value of tested mud sample.
Advantage and good effect that the present invention has are: adopt 2 slope methods to determine seaworthiness mud severe value, can remove the subjective artificial property when determining seaworthiness mud severe, draw more objective seaworthiness mud severe value, improve the seaworthy water depth application security, for the enforcement of seaworthy water depth technology provides more objective foundation, simultaneously, the further applied research of standard seaworthy water depth.
Description of drawings
Fig. 1 is mud severe adopting of background technology bathmometry of the present invention and the graph of relation of yield stress;
Fig. 2 is another mud severe of background technology bathmometry employing of the present invention and the graph of relation of yield stress;
Fig. 3 is the mud severe of 2 slope methods employings of the present invention and the graph of relation of yield stress.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
2 slopes of a kind of seaworthiness mud severe value are determined method, and step is as follows:
One) the mud sample of collection in worksite and the water sample in corresponding marine site are mixed with the sample of different severes, measure the yield stress of sample under different shearings rate of different severes, draw mud severe and yield stress relation curve, as shown in Figure 3.
Preferably make the severe of sample identical or equal as far as possible at interval during preparation mud sample, to draw the more seaworthiness severe value of objective reality.
Two) get 2 adjacent points successively, calculate the slope of point-to-point transmission straight line, draw a series of slope value.
Please refer to Fig. 3, in the present embodiment, press mud severe value order from small to large, get 2 points successively, point (10.32,1.0638) and point (10.79,1.077) between straight-line equation be y=0.0281x+0.774, point (10.79,1.077) and point (11.33,1.1246) between straight-line equation be y=0.0881x+0.1259, point (11.33,1.1246) and point (11.76,2.1894) between straight-line equation be y=2.4763x-26.932, point (11.76,2.1894) and point (12.05,3.655) between straight-line equation be y=5.0538x-57.243, point (12.05,3.655) and point (12.24,4.6822) between straight-line equation be y=5.4063x-61.491, point (12.24,4.6822) and point (12.54,7.8976) between straight-line equation be y=10.718x-126.51, point (12.54,7.8976) and point (12.81,12.477) between straight-line equation be y=16.961x-204.79, point (12.81,12.477) and point (13.25,32.624) between straight-line equation be y=45.789x-574.08, point (13.25,32.624) and point (13.76,93.064) between straight-line equation be y=118.51x-1537.6, straight-line equation between point (13.76,93.064) and point (14.08,114.47) is y=66.894x-827.39, point (14.08,114.47) and the point 14.34,147.12) between straight-line equation be y=125.58x-1653.7, it is as follows to draw a series of slope value thus: 0.0281,0.0081,2.4763,5.0538,5.4063,10.718,16.961,45.789,118.51,66.894,125.58.
Three) a series of slope value finishing analysis to drawing are got the slope mutation initiation and are put corresponding severe value as the seaworthiness mud severe value of tested mud sample.
Please refer to Fig. 3, in the present embodiment, some row slope value that draw in the step 2 are analyzed, slope value is since 10.718 sudden changes as can be known, therefore slope value is that the starting point of 10.718 line segment is slope mutation initiation point, the mud severe value that this point is corresponding is 12.54, thereby the seaworthiness mud severe value that draws in the present embodiment is 12.54.
The present invention is not merely from visually judging, also just no longer as the method for " mud matter harbour seaworthy water depth application technology standard " regulation at present the obvious displaying ratio of the coordinate axis of figure that is subjected to influence, also be not subjected to simultaneously person in charge's decision influence of personnel, therefore new method of the present invention can draw seaworthiness mud severe more objective, that more gear to actual circumstances.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (1)
1. 2 slopes of a seaworthiness mud severe value are determined method, it is characterized in that step is as follows:
One) the mud sample of collection in worksite and the water sample in corresponding marine site are mixed with the sample of different severes, measure the yield stress of sample under different shearings rate of different severes, draw mud severe and yield stress relation curve;
Two) get 2 adjacent points successively, calculate the slope of point-to-point transmission straight line, draw a series of slope value;
Three) a series of slope value finishing analysis to drawing are got the slope mutation initiation and are put corresponding severe value as the seaworthiness mud severe value of tested mud sample.
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| CN201310256008XA CN103293287A (en) | 2013-06-25 | 2013-06-25 | A two-point slope determination method for a navigable mud density |
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| CN201310256008XA CN103293287A (en) | 2013-06-25 | 2013-06-25 | A two-point slope determination method for a navigable mud density |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042871A (en) * | 2016-12-30 | 2017-08-15 | 交通运输部天津水运工程科学研究所 | The method for determining the suitable pool silt density value in Muddy Bottoms harbour |
| CN110361295A (en) * | 2019-07-24 | 2019-10-22 | 东北石油大学 | A kind of w/o type waxy crude oil emulsion yield point determines method |
| CN112016216A (en) * | 2020-09-08 | 2020-12-01 | 上海新暴威电子科技有限公司 | Method for determining press-fitting curve inflection point |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201110770Y (en) * | 2007-11-27 | 2008-09-03 | 天津水运工程勘察设计院 | Seaworthiness bathymetric survey integrated processing unit |
| EP2522953A1 (en) * | 2011-05-09 | 2012-11-14 | Baggerwerken Decloedt en Zoon N.V. | Method and device for determining the nautical depth of a water mass |
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2013
- 2013-06-25 CN CN201310256008XA patent/CN103293287A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201110770Y (en) * | 2007-11-27 | 2008-09-03 | 天津水运工程勘察设计院 | Seaworthiness bathymetric survey integrated processing unit |
| EP2522953A1 (en) * | 2011-05-09 | 2012-11-14 | Baggerwerken Decloedt en Zoon N.V. | Method and device for determining the nautical depth of a water mass |
Non-Patent Citations (1)
| Title |
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| 万军等: "洋山深水港区进港外航道台风期适航水深研究", 《水运工程》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042871A (en) * | 2016-12-30 | 2017-08-15 | 交通运输部天津水运工程科学研究所 | The method for determining the suitable pool silt density value in Muddy Bottoms harbour |
| CN107042871B (en) * | 2016-12-30 | 2018-09-18 | 交通运输部天津水运工程科学研究所 | The method for determining the suitable pool silt density value in Muddy Bottoms harbour |
| CN110361295A (en) * | 2019-07-24 | 2019-10-22 | 东北石油大学 | A kind of w/o type waxy crude oil emulsion yield point determines method |
| CN110361295B (en) * | 2019-07-24 | 2022-06-21 | 东北石油大学 | Method for determining yield point of W/O type wax-containing crude oil emulsion |
| CN112016216A (en) * | 2020-09-08 | 2020-12-01 | 上海新暴威电子科技有限公司 | Method for determining press-fitting curve inflection point |
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Application publication date: 20130911 |