CN104776977B - A kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure - Google Patents

A kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure Download PDF

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CN104776977B
CN104776977B CN201510207061.XA CN201510207061A CN104776977B CN 104776977 B CN104776977 B CN 104776977B CN 201510207061 A CN201510207061 A CN 201510207061A CN 104776977 B CN104776977 B CN 104776977B
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pressure sensor
physical experiments
sediment
wave
total powerstation
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CN104776977A (en
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梁丙臣
李华军
刘勇
潘新颖
尹志清
齐静静
王俊
杨正通
徐照妍
王振鲁
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Ocean University of China
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Abstract

The present invention provides a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure, is characterized in:It is included in the total powerstation set on the outside of silt physical experiments tank, high-speed camera, miniature soil pressure sensor and pore water pressure sensor in bottom are arranged in silt physical experiments tank, observation procedure includes high speed video process, dual sensor synchronously visits point method, total powerstation profile survey method, high speed video process is used to shoot bottom dynamic evolution and wave changing course from the glass side wall of silt physical experiments tank, it is to isolate the dynamic pressure produced by wave by pore water pressure sensor to obtain the actual change of bottom elevation that dual sensor, which synchronously visits point method, total powerstation profile survey method scatterplot scanning is carried out to section with total powerstation after ripple completes slowly to discharge water and then is obtained final landform and corrected making.It is adapted to use in flume test, realizes the synchronous real-time monitored to whole physical experiments bottom dynamic evolution.

Description

A kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure
Technical field
Gone to the bottom the present invention relates to harbour, coastal engineering field physical experiments, more particularly to two-dimensional flume wave action The observation procedure that bed section is dynamically adjusted, specifically a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation Method.
Background technology
In coastal engineering physical experiments field, the particularly experiment comprising sediment movement, landform is used as influence ripple The key factor of wave motion, is constantly in the process of dynamic change, therefore, the acquisition of dynamic terrain data is for development test The mechanism of action is most important.Traditional topographic survey method is mainly by means of total powerstation, the instrument such as ultrasonic distance measuring apparatus, although they Have the advantages that precision is high, but due to can not be used in the case where there is water body, therefore, there is significant limitation, can not expire The requirement of foot modern times harbor work's experiment.The methods such as new test measurement method such as LIDAR, Profiler, although can realize pair The dynamic monitoring of landform, but can not realize simultaneous observation, complex operation and cost is too high is not appropriate for making in flume test With.Therefore, deepening continuously along with experimental study, a kind of low cost and the strong physical experiments of feasibility(Particularly mud Husky exercise test)Observation procedure is urgently found.
The content of the invention
The technical problems to be solved by the invention are:There is provided a kind of sediment of coastal engineerings physical experiments bottom dynamically comprehensive Observation procedure is closed, is solved not realizing in the prior art in process of the test to the observation of the dynamic of bottom, new test measurement The defect of method cost height and complex operation, is adapted to use in flume test, realizes dynamic to whole physical experiments bottom The synchronous real-time monitored that state is developed, and easy to operate, cost is relatively low.
The technical scheme that the present invention is provided is that a kind of sediment of coastal engineerings physical experiments bottom that the present invention is provided is moved State INTEGRATED SIGHT method, it is characterised in that including the INTEGRATED SIGHT method laid observation system and carried out using observation system;Institute Observation system is stated to be included in the total powerstation set outside silt physical experiments tank, high-speed camera, be arranged on silt physics Miniature soil pressure sensor and pore water pressure sensor in model test tank in bottom, it is comprehensive that the observation system is carried out Closing observation procedure includes CCTV(Closed Circuit Television)High speed video process, dual sensor synchronously visit a point method, complete Stand instrument profile survey method, wherein, the CCTV high speed video process is using high-speed camera from silt physical experiments tank Glass side wall shoots bottom dynamic evolution and wave changing course, and by setting up the relation between graphical rule and physical size Image correction parameters are obtained, so as to obtain physical size spatially, it is by miniature soil pressure that the dual sensor, which synchronously visits point method, Force snesor and pore water pressure sensor are fixed together and are embedded in certain depth under the bottom(Guarantee is not etched), lead to Cross pore water pressure sensor and isolate the dynamic pressure produced by wave so as to obtain the actual change of bottom elevation, the total powerstation Profile survey method is carried out scatterplot scanning to section with total powerstation and then obtained finally making after ripple completes slowly to discharge water Shape, total powerstation the data obtained is used to be corrected the final landform that high speed video process and dual sensor synchronously visit point method.
CCTV high speed video process as described above, in order to improve knowing for water body and bottom interface, air and water body interface Do not spend, uniform strong light should be arranged above silt physical experiments tank(Such as searchlight)Or laser apparatus, to reduce Interference of the suspended load to bottom elevation in the identification process of interface.
CCTV high speed video process as described above, in order to improve measurement accuracy, the high-speed camera should be big according to pixel Small and required precision covers correspondingly sized target zone, and it is 2-4 m that the high-speed camera, which shoots effective coverage, then its precision (Physical length/pixel number)For 0.1-0.3 cm,(Such as:Horizontal pixel point 1920, shooting effective coverage is 3 m, then its precision About 300/1920=0.156 cm).
CCTV high speed video process as described above, in order to obtain the topographic(al) data of time-histories, generally takes the picture of per half a minute Information, but in order that result is more accurate, the minimum value of elevation in previous and latter wave period of each moment can be taken As the actual elevation of bottom, to reduce the error that suspended load under wave action is likely to result in.In addition provided to obtain wave height Material, according to wave period, general setting high-speed video camera shooting speed is 8-12 frames/second, and otherwise frequency is too high to cause the later stage Data volume is too very much not disposable, and frequency is too low to cause the increase of wave height measurement error.
CCTV high speed video process as described above, the information of all pixels point in overlay area can be captured by video, So as to can not only calculate the elevation change of bottom and water body Free Surface, the time-histories evolution process of landform and wave height is obtained, also Bed load, suspended load, information content very abundant can be distinguished according to image aberration, and instrument layout is relative to wave-height gauge For spatially without limitation.
Dual sensor as described above synchronously visits point method, to record the overall process that water front is corroded and sand bar is moved, visits an edge Bottom entirety gradient direction arrangement, wave breaking point is nearby and the wave band that swashes need to arrange more intensive, and arrangement interval takes 0.4-0.6m, and between break-up point, visiting, point arrangement is more sparse playing slope point, arrangement interval takes 1.4-1.6m.
Dual sensor as described above synchronously visits point method, to ensure while record the entire profile change procedure, to reduce husky The lower dynamic pressure influence of layer, miniature soil pressure sensor and pore water pressure sensor depth of placement need to be below the bed surface of the bottom Between 1-3 times of wave height depth, because the maximum place of climbing is often the most serious region that weathers, Probe arrangement depth should not be excessively shallow, The 2-3 times of wave height depth bounds about below bed surface.
Dual sensor as described above synchronously visits point method, to ensure miniature soil pressure sensor and pore water pressure sensor 2 probe sampling points it is identical, and prevent in process of the test the sliding of position or sink, the same miniature soil visited on point Two probes of pressure sensor and pore water pressure sensor need to be fixed on one block of lucite or smooth ceramic tile, and are ensured The block density fixed is water density more than 2 times.
Dual sensor as described above synchronously visits point method, to explain in detail action rule of the wave motion to sediment movement, Miniature soil pressure sensor used sample frequency identical with pore water pressure sensor setting, to ensure the waveform energy of survey region Complete description.
Dual sensor as described above synchronously visits a point method, be in reprocessing analysis, set up miniature soil pressure sensor with Electric signal relation between pore water pressure sensor, accurately measures miniature soil pressure sensor and pore water pressure sensor Calibration coefficient.
Total powerstation profile survey method as described above, using measurement accuracy for ± 1mm guest obtain R-202NE total powerstations to regarding Frequency is shot near placement side glass side wall(Also near pressure sensor settlement)The longitudinal landform of bottom carry out elevation survey Amount, measurement step-length is determined according to the Variation Features and requirement of experiment of actual landform.Generally relatively regular simple section is tested, Wave effect less than bottom upper zone, measurement interval is larger(Example takes 14-16cm);Wave can influence but change Gently, the simple section of form, measurement interval suitably reduces(9-11cm is taken in example);The more complicated region of topography variation, is surveyed Amount interval is smaller(5 ~ 8cm is taken in example).Each section of measurement interval all considers features of terrain and specific change, it is ensured that topographic profile Feature is reflected.
Total powerstation profile survey method as described above, in terms of details is measured, due to total powerstation using laser reflection come really Set the goal position, and the track of light is straight line, light be blocked or abnormal reflection can cause the landform such as depression can not direct measurement, R. concomitans levelling rod obtains these data;In addition, can cause to shine when the light of Laser emission and smaller target point angle to be measured The hot spot penetrated in target point is larger, causes measurement error or measurement difficult, therefore the erection selection of total powerstation high position as far as possible, entirely Instrument stand in measurement, laser beam is with horizontal direction minimum angle more than 3 °.
The present invention has the following advantages that and good effect compared with prior art:The sediment of coastal engineerings thing that the present invention is provided Model test bottom dynamic comprehensive observation procedure is managed, solution can not realize the dynamic in process of the test to bottom in the prior art The defect of observation, new test measurement method cost height and complex operation.The present invention is adapted to use in flume test, realizes To the synchronous real-time monitored of whole physical experiments bottom dynamic evolution.With simple to operate, precision it is high, rational in infrastructure, make The advantages of valency is relatively low.
Brief description of the drawings
Fig. 1 is the interior schematic diagram for arranging dual sensor of silt physical experiments tank in the present invention;
Fig. 2 sets the top view of high-speed camera for silt physical experiments tank side in the present invention;
Fig. 3 is video correction grid schematic diagram in present example;
Fig. 4 is that miniature soil pressure sensor and pore water pressure sensor are arranged on into one piece of organic glass in present example Schematic diagram on glass;
Fig. 5 is Fig. 4 upward view.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The all other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Referring to Fig. 1-Fig. 3, a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure of the invention Embodiment, including lay observation system and the INTEGRATED SIGHT method carried out using observation system;Silt physical experiments tank 1 Include the bottom 2 of cement base 5, glass side wall 4 and inside, the bottom 2 is formed by sand accumulation, forms certain slope, examination When testing, the horizontal horizontal line added in silt physical experiments tank 1 in a certain amount of water, Fig. 1 below SWL is net Water level.The observation system is included in the outer total powerstation set of silt physical experiments tank 1 and high-speed camera 6, set Miniature soil pressure sensor 3-2 machines water pressure sensor 3-1 in the bottom 2 of silt physical experiments tank 1, observation system The INTEGRATED SIGHT method of progress includes CCTV(Closed Circuit Television)High speed video process, dual sensor are synchronous Visit point method, total powerstation profile survey method.Wherein, the CCTV high speed video process is tried using the silt physical model of high-speed camera 6 Test the glass side wall 4 of tank 1 and shoot the dynamic evolution of bottom 2 and wave changing course, and by setting up graphical rule and physical size Between relation obtain image correction parameters, so as to obtain physical size spatially.The dual sensor synchronously visits point method Miniature soil pressure sensor 3-2 and pore water pressure sensor 3-1 are fixed together and the next depthkeeping of the bottom 2 is embedded in Degree, isolates the dynamic pressure produced by wave to obtain the actual change of bottom elevation by pore water pressure sensor 3-1.Institute State total powerstation profile survey method be make ripple complete water is slowly discharged after section is carried out with total powerstation scatterplot scanning so that must To final landform, total powerstation the data obtained is used to carry out school to the final landform that high speed video process and dual sensor synchronously visit point method Just.
CCTV high speed video process as described above, in order to improve knowing for water body and the interface of bottom 2, air and water body interface Do not spend, the searchlight or laser apparatus of uniform strong light should be arranged in the top of silt physical experiments tank 1, to reduce Interference of the suspended load to the elevation of bottom 2 in the identification process of interface.
CCTV high speed video process as described above, in order to improve measurement accuracy, the high-speed camera 6 should be big according to pixel Small and required precision covers correspondingly sized target zone, and it is 2-4 m that the high-speed camera 6, which shoots effective coverage, then its essence Degree(Physical length/pixel number)For 0.1-0.3 cm,(Such as:Horizontal pixel point 1920, shooting effective coverage is 3 m, then its essence Degree is about 300/1920=0.156 cm).
CCTV high speed video process as described above, in order to obtain the topographic(al) data of time-histories, generally takes the picture of per half a minute Information, but in order that result is more accurate, the minimum value of elevation in previous and latter wave period of each moment can be taken As the actual elevation of bottom 2, to reduce the error that suspended load under wave action is likely to result in.In addition provided to obtain wave height Material, according to wave period, general setting high-speed video camera shooting speed is 8-12 frames/second, and otherwise, frequency is too high to be caused the later stage Data volume is too very much not disposable, and frequency is too low to cause the increase of wave height measurement error.
CCTV high speed video process as described above, the information of all pixels point in overlay area can be captured by video, So as to can not only calculate the elevation change of bottom 2 and water body Free Surface, the time-histories evolution process of landform and wave height is obtained, also Bed load, suspended load, information content very abundant can be distinguished according to image aberration, and instrument layout is relative to wave-height gauge For spatially without limitation.
Dual sensor as described above synchronously visits point method, to record the overall process that water front is corroded and sand bar is moved, visits an edge The overall gradient direction arrangement of bottom 2, wave breaking point is nearby and the wave band that swashes need to arrange more intensive, and arrangement interval takes 0.4-0.6m, and between break-up point, visiting, point arrangement is more sparse playing slope point, arrangement interval takes 1.4-1.6m.
Dual sensor as described above synchronously visits point method, to ensure while record the entire profile change procedure, miniature soil Pressure sensor 3-2 and pore water pressure sensor 3-1 depth of placement need to below the bed surface of the bottom 2 1-3 times of wave height depth Between degree, because the maximum place of climbing is often the most serious region that weathers, Probe arrangement depth should not be excessively shallow, about in bottom 2 2-3 times of wave height depth bounds below bed surface.
Upper described dual sensor synchronously visits point method, to ensure that miniature soil pressure sensor 3-2 is sensed with pore water pressure Device 3-1 2 probe sampling points are identical, and prevent the sliding of position or sagging in process of the test, as shown in Figure 4, Figure 5, same One piece of organic glass need to be fixed on by visiting the miniature soil pressure sensor 3-2 on point and pore water pressure sensor 3-1 two probes On glass 3-3 or smooth ceramic tiles(What miniature soil pressure sensor 3-2, pore water pressure sensor 3-1 and lucite 3-3 were constituted Integrative-structure is referred to as dual sensor 3), it is ensured that the density for the lucite 3-3 or smooth ceramic tiles fixed be water density 2 again with On.In use, only needing to a miniature soil pressure sensor 3-2 and a hole on one block of lucite 3-3 or smooth ceramic tile Water pressure sensor 3-1, still, because pore water pressure sensor 3-1 is easily damaged, may make to reduce replacing instrument Into trouble, in one piece of lucite 3-3 in the present embodiment(Or smooth ceramic tile)On secure a miniature soil pressure sensor 3-2 and two pore water pressure sensor 3-1, wherein, it is standby to have a pore water pressure sensor 3-1.
Dual sensor as described above synchronously visits point method, to explain in detail action rule of the wave motion to sediment movement, Miniature soil pressure sensor 3-2 used sample frequency identical with pore water pressure sensor 3-1 settings, to ensure survey region Waveform can be described completely.
Dual sensor as described above synchronously visits point method, is in reprocessing analysis, to set up miniature soil pressure sensor 3-1 Electric signal relation between pore water pressure sensor 3-1, accurately measures miniature soil pressure sensor 3-2 and pore water pressure Sensor 3-1 calibration coefficient.
Total powerstation profile survey method as described above, using measurement accuracy for ± 1mm guest obtain R-202NE total powerstations to regarding Frequency is shot near placement side glass side wall 4(Also near the settlement of dual sensor 3)Topographic profile carry out the measurement of higher degree, survey Step-length is measured to be determined according to the Variation Features and requirement of experiment of actual landform.Generally relatively regular simple section is tested, in wave The upper zone not affected, measurement interval is larger(Example takes 14-16cm);Wave can influence but change gentle, shape The simple section of state, measurement interval suitably reduces(9-11cm is taken in example);The more complicated region of topography variation, measurement interval compared with It is small(5 ~ 8cm is taken in example).Each section of measurement interval all considers features of terrain and specific change, it is ensured that obtain the characteristics of topographic profile Reflection.
Total powerstation profile survey method as described above, in terms of details is measured, due to total powerstation using laser reflection come really Set the goal position, and the track of light is straight line, light be blocked or abnormal reflection can cause the landform such as depression can not direct measurement, R. concomitans levelling rod obtains these data;In addition, can cause to shine when the light of Laser emission and smaller target point angle to be measured The hot spot penetrated in target point is larger, causes measurement error or measurement difficult, therefore the erection selection of total powerstation high position as far as possible, entirely Instrument stand in measurement, laser beam is with horizontal direction minimum angle more than 3 °.
As shown in figure 1, being the schematic diagram of present invention arrangement dual sensor 3 in silt physical experiments tank 1, because of mud Husky physical experiments tank 1 is very long, and Fig. 1 is only the partial schematic diagram containing the part of bottom 2;
As shown in Fig. 2 setting bowing for high-speed camera 6 for the side of silt physical experiments tank 1 in present example View, because silt physical experiments tank 1 is very long, Fig. 2 is only the partial schematic diagram containing the part of bottom 2;In the present embodiment Video monitoring system used is that South Korea HD IP Box Camera are equipped with FUJIFILM 8-80 mm F1.6 camera lenses, and setting is shot Frame number is 10fps, and gained is 1680 × 1920 per frame picture pixels.High-speed camera 6 is disposed side by side on the examination of silt physical model Test the same side of tank 1, two pieces of glass side walls 4 of the every camera lens of high-speed camera 6 covering silt physical experiments tank 1 (Horizontal length:1.5 m × 2), the rear portion of high-speed camera 6 is equipped with gobo to reduce the glass-reflected caused by external light Interference, intense light source is installed on the top of silt physical experiments tank 1(About 100W-150W)Or feux rouges(Wavelength 650nm or so) Laser is to strengthen interface identification degree.High-speed camera 6 is highly answered sufficiently low with guarantee shooting silt physical experiments water The phenomenon of glass side wall 4 of groove 1, it is to avoid occur object in silt physical experiments tank 1 in video and disturb.In addition, taking the photograph at a high speed Camera 6 should try one's best level and positioned at photographic subjects horizontal centre vertical line on, to reduce the error caused by scalloping, improve Precision.
Fig. 3 show the image rectification principle of CCTV high speed video process.As shown in figure 3, in glass edge before on-test Adhesive correction grid 7 on wall 4(The cm of grid level spacing 20, the cm of vertical interval 10), the closeer precision of calibration grid 7 is higher, school The crosspoint of positive grid 7 is check point 8, by analyzing pixel position and the relation of actual size of the correction picture, is passed through Fitting can set up the relation that image coordinate fastens all pixels point and actual size.
Fig. 4 show synchronous visit of dual sensor and puts a method basic layout, miniature soil pressure sensor 3-2 range 50Kpa, directly Footpath 16mm, thickness 4.8mm, Full-span output about 300, quasi- trueness error≤0.3F.S, overload capacity 120%, bridge resistance, For 350, can be worked in saturation aqueous medium, using U.S.'s UEI data collecting systems, sample frequency is controllable;Pore water pressure Sensor 3-1 range 10Kpa, diameter 20mm, error one thousandth, sample frequency is controllable.
Above content is taken from ocean engineering key lab of Shandong Province bottom and develops physical experiments example.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that:It still may be used To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic; And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and Scope.

Claims (10)

1. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure, it is characterised in that seen including laying Examining system and the INTEGRATED SIGHT method carried out using observation system;The observation system is included in silt physical experiments tank The total powerstation of outer setting, high-speed camera, it is arranged on the miniature soil pressure sensing in bottom in silt physical experiments tank Device and pore water pressure sensor, the INTEGRATED SIGHT method that the observation system is carried out include CCTV high speed video process, double-sensing Device synchronously visits point method, total powerstation profile survey method, wherein, the CCTV high speed video process uses high-speed camera from silt physics The glass side wall of model test tank shoots bottom dynamic evolution and wave changing course, and by setting up graphical rule and reality Relation between yardstick obtains image correction parameters, so as to obtain physical size spatially, the dual sensor synchronously visits point Method is that miniature soil pressure sensor and pore water pressure sensor are fixed together and certain depth under the bottom is embedded in, and is led to Cross pore water pressure sensor and isolate the dynamic pressure produced by wave so as to obtain the actual change of bottom elevation, the total powerstation Profile survey method is carried out scatterplot scanning to section with total powerstation and then obtained finally making after ripple completes slowly to discharge water Shape, total powerstation the data obtained is used to be corrected the final landform that high speed video process and dual sensor synchronously visit point method.
2. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure according to claim 1, its It is characterised by, the searchlight or laser apparatus of uniform strong light is arranged above the silt physical experiments tank.
3. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure according to claim 1 or 2, Characterized in that, described CCTV high speed video process, the high-speed camera shoots effective coverage for 2-4 m, its physical length/ The value of pixel number is 0.1-0.3 cm.
4. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure according to claim 3, its It is characterised by, described CCTV high speed video process, in order to obtain the topographic(al) data of time-histories, takes the pictorial information of per half a minute, and And, the minimum value of elevation in previous and latter wave period of each moment is taken as the actual elevation of bottom, setting high-speed Video camera shooting speed is 8-12 frames/second, and the information of all pixels point in overlay area can be captured by video.
5. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure according to claim 1 or 2, Characterized in that, described dual sensor synchronously visits point method, the overall process moved for the erosion of record water front and sand bar visits point the bottom of along The overall gradient direction arrangement of bed, wave breaking point is nearby and the swash spy point arrangement interval of band of wave takes 0.4-0.6m, and Play slope point and take 1.4-1.6m, miniature soil pressure sensor and the pore water pressure sensing to point arrangement interval between break-up point, is visited Device depth of placement is between 1-3 times of wave height depth below the bed surface of the bottom, and the same miniature soil pressure visited on point is passed Two probes of sensor and pore water pressure sensor are fixed on one block of lucite or smooth ceramic tile, and the lucite Or the density of smooth ceramic tile is water density more than 2 times.
6. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure according to claim 5, its It is characterised by, described dual sensor is synchronously visited in point method, and the miniature soil pressure sensor is set with pore water pressure sensor Determine identical sample frequency.
7. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure according to claim 6, its It is characterised by, is the electric signal set up between miniature soil pressure sensor and pore water pressure sensor in reprocessing analysis Relation, accurately measures the calibration coefficient of miniature soil pressure sensor and pore water pressure sensor.
8. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure according to claim 1 or 2, Characterized in that, described total powerstation profile survey method, using measurement accuracy for ± 1mm guest obtain R-202NE total powerstations to regarding Frequently shoot the longitudinal landform of the bottom near placement side glass side wall and carry out the measurement of higher degree, measure change of the step-length according to actual landform Change feature and requirement of experiment are determined, relatively regular simple section is tested, wave effect less than bottom upper zone, measurement Interval takes 14-16cm;Wave can influence but change gentle, the simple section of form, and measurement interval takes 9-11cm;Topography variation More complicated region, measurement interval takes 5 ~ 8cm.
9. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure according to claim 7, its It is characterised by, described total powerstation profile survey method, R-202NE total powerstations is obtained to video for ± 1mm guest using measurement accuracy Shoot the longitudinal landform of the bottom near placement side glass side wall and carry out the measurement of higher degree, measure change of the step-length according to actual landform Feature and requirement of experiment are determined, relatively regular simple section is tested, wave effect less than bottom upper zone, between measurement Every taking 14-16cm;Wave can influence but change gentle, the simple section of form, and measurement interval takes 9-11cm;Topography variation compared with Complicated region, measurement interval takes 5 ~ 8cm.
10. a kind of sediment of coastal engineerings physical experiments bottom dynamic comprehensive observation procedure according to claim 8, its It is characterised by, described total powerstation profile survey method, in terms of details is measured, it is impossible to landform measured directly, R. concomitans water Object staff obtains these data;Total powerstation is in measurement, and laser beam is with horizontal direction minimum angle more than 3 °.
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