CN102279090A - Density flow model test method applicable to canyon-type reservoir - Google Patents
Density flow model test method applicable to canyon-type reservoir Download PDFInfo
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Abstract
The invention relates to a hydraulic model test method, in particular to a density flow model test method applicable to a canyon-type reservoir, and belongs to the technical field of water conservancy projects. The international patent classification (IPC) number of the density flow model test method is E02B 1/02. In the test method, rails are arranged on both sides of the model; a sampling bridge capable of moving along the upper streams and the lower streams of the rails is arranged on the model; a sampling device consisting of sampling tubes and copper tubes is integrally arranged on a detection rod of the sampling bridge; the sampling tubes are communicated with a negative pressure device; and the negative pressure device comprises a water ring pump, an air storage tank and a pressure exhaust tube. By using the negative pressure device and the sampling tubes arranged at different water depths, a plurality of sections at different water depths can be sampled conveniently and immediately; therefore, the sampling efficiency and the effectiveness of sand-containing samples are improved, the data quantity of test data is increased, the test precision is improved and the working efficiency is improved remarkably.
Description
Technical field:
The present invention relates to a kind of hydraulic model test method, particularly a kind of density current model test method that is applicable to valley type reservoir belongs to the hydraulic engineering technical field, and its IPC international Patent classificating number is E02B 1/02.
Background technology:
Two or more fluid contacts with each other, and its severe has certain still less difference, if wherein a kind of fluid is mobile along the direction of interface, blending phenomenon of overall importance does not take place in flow process, and this flowing is called density current.Density current is a kind of peculair motion form of sediment laden flow, and it appears at reservoir, caecum section usually, dig formula river port and lock approach etc. locates, and these local sediment movements and river bed change are had material impact.The muddy water that the reservoir upstream is come slips into the bottom of the reservior in the somewhere of reservoir, and before over one hundred kilometer arrival dam of the operation that has, and top layer Ku Shui is limpid not muddy, and this is the formed reservoir density current of carrying muddy water.In reservoir running, because the generation of density current is difficult for finding,, density current in time finds and opens lines of orifices sand if having arrived on the dam before, and muddy water stop before the dam in a large number, cause sedimentation before the dam, and storage capacity can dwindle very soon.But, if found out the generation and the moving law of reservoir density current, when on heavily silt-carrying river, building storage reservoir and power station, bottom outlet being set, the Turbid Density Flow that rationally is used in the bottom of the reservior motion can be drained silt, reduces reservoir sedimentation.
Because condition differences such as the water sand of each reservoir, the hydrology, geology, landform, therefore, must be by accurate reservoir density current model test, accurately simulate the generation and the ruuning situation of density current under the various boundary conditions, find out the generation and the moving law of reservoir density current, utilize density current to reduce reservoir sedimentation.Even can manually mould density current according to its generation and moving law, to drain the reservoir silt, prolong reservoir serviceable life.
Generally speaking, the river model or the river-like reservoir model depth of water are superficial, utilize the sample spoon direct sample during test, contain pycnometer, utilize the quick weighing of electronic balance, and the input computer calculates in real time, obtains the real-time silt content numerical value of each sampling spot.This value reality is sampling spot place mean sediment concentration numerical value.
But the mountain reservoir major part of China is a valley type reservoir, and the reservoir area side slope is very steep, after its hydraulic model was handled through metamorphosis, it is more steep that side slope becomes, and the side slope of most of storehouse section is all more than 70 °, part libraries section even near 90 ° makes each section silt content key element sampling be restricted.
Especially in the period that density current takes place, have water-accumulating body in the reservoir, the clear water depth of water is bigger, and after density current slipped into, in the operation of clear water lower floor, each section silt content key element sampling was difficult unusually, and traditional silt content sampling method can not be taken a sample.The difficulty height of density current test is pressed for time, under many circumstances, can not testing or testing untimely, can have a strong impact on the precision of density current test findings.
In order to guarantee sampling precision, need slowly or fast sample according to the different fluidised forms of current, in the reservoir of the big depth of water, high sediment concentration, carry out the density current sampling, increase the workload and the difficulty of model test widely.
At above-mentioned situation, exploitation is applicable to the method for valley type reservoir density current model test, become the major issue of urgent solution, the staff of Xiaolangdi Reservoir model test project team is in the making and process of the test of model, sum up model test working experience for many years, by repeatedly groping trial, in conjunction with novel model silt content sampling equipment, invented the method that is applicable to valley type reservoir density current hydraulic model test, and on the Xiaolangdi Dam Project solid model, found broad application.
Summary of the invention:
The objective of the invention is to overcome the deficiencies in the prior art, a kind of valley type reservoir density current model test method is provided.Technical scheme of the present invention is as follows:
A kind of density current model test method that is applicable to valley type reservoir comprises following key step:
(1), select how much suitable guides for use according to field data: horizontal guide 300, vertical scale 60 is set up the reservoir physical model;
(2) in the two sides of model, fixedly install a track respectively, the trend of two the described tracks trend with two sides respectively is consistent; Section quantity according to model plan is measured is provided with a plurality of sampling bridges across the model two sides, and sampling bridge width is a 0.5-1.5 rice; Both sides at described sampling bridge are set with guide rail, are provided with carriage at the two ends of described sampling bridge, described carriage can be simultaneously along the guide rail slip of described track (1) and sampling bridge (2) both sides;
(3) a metal feeler lever is installed on the guide rail of described sampling bridge upstream side, described feeler lever is provided with level and vertical adjustment bolt with described guide rail junction, utilize described horizontal adjusting bolt, described feeler lever is moved horizontally along described guide rail, utilize described vertical adjustment bolt, make described feeler lever vertical moving; Be installed with on described feeler lever and touch base plate, described to touch base plate vertical with feeler lever;
(4) on described feeler lever sampler is installed, described sampler comprises 1 auxiliary staff gauge and 4 stopple coupons; Described auxiliary staff gauge is fixed on the described feeler lever, is used to sound the depth of the water; 4 described stopple coupons are soft sebific duct, be bundled on the described feeler lever, the water inlet end of every described stopple coupon is equipped with copper pipe, and the water inlet of 4 copper pipes is towards reservoir upland water direction, and the height and position difference of every copper pipe on feeler lever is used for leaving and taking water sample in the different depth of water; The other end of 4 stopple coupons extends to the outside of model body of wall, in the intake pipe water side sampling by-pass valve control is installed, and is used for beginning or stops sampling; The elevation of intake pipe water side should be lower than the elevation of described copper pipe;
(5) at the outer setting negative pressure device of model of reservoir, described negative pressure device by water ring vacuum pump, gas-holder, take out pressure pipe and sampling bucket is formed, water ring vacuum pump connects gas-holder, gas-holder connects takes out pressure pipe, take out pressure pipe and comprise taking out and press dry pipe and take out the pressure arm, take out and press dry pipe and press arm to be connected, take out and press dry the outside that pipe is laid in the model body of wall by threeway with taking out, take out and press arm to be laid in the place of closing on the stopple coupon water side, take out and press the arm entrance point that by-pass valve control is installed; The top of described sampling bucket is provided with 2 interfaces, and one of them interface presses the endpiece of arm to be communicated with by soft sebific duct with described taking out, and another interface is equipped with the connection-peg with described sampling pipe water side coupling; In the model wall outer side of closing on the stopple coupon water side 1 water receiving tank is installed, the bottom of described water receiving tank and described sampling bucket all with dump cross current, be used to drain the water of abandoning of intake pipe;
(6) be provided with and abandon water flushing device, described flusher comprises a clarified water pump and drinking-water pipe, and described clarified water pump extracts clear water in the cistern by drinking-water pipe, and what be used to wash sampling bucket and water receiving tank abandons deposit silt in dumping water pipe of water;
(7) in the place of closing on sampling bridge, water receiving tank and water ring vacuum pump simple and easy communication device is set respectively, the operating personnel that are used for above-mentioned three places get in touch at any time, carry out the cooperation of test;
(8) come husky field data according to the reservoir upland water, carry out model of reservoir and discharge water;
(9) open negative pressure device, make to take out to press dry pipe and take out the air pressure of pressing in the arm to be negative 1 atmospheric pressure; 4 stopple coupon water sides are plugged into successively on the connection-peg of sampling bucket, open stopple coupon and take out the by-pass valve control of pressing arm, under the effect of negative pressure, make to be full of muddy water in the stopple coupon, closing control valve is placed on the stopple coupon water side in the water receiving tank then;
When (10) taking a sample, length according to stopple coupon, earlier the muddy water in the stopple coupon is drained 20-60 second in water receiving tank, make the muddy water emptying of before having saved in the stopple coupon, guarantee that each sampling is real-time silt content sampling, then, pycnometer is placed in the water receiving tank, the stopple coupon water delivering orifice is placed the proportion bottleneck, utilize pycnometer to carry out the silt content sampling, close the sampling by-pass valve control when pycnometer is full;
(11) by test data analyzer, perhaps,, should encrypt test slipping into the section downstream observing on the model after density current slips into, the observation density current arrives the time that each intends measuring section;
(12) after certain hour is carried out in test, start and abandon water flushing device, flushing dumps silt in the water pipe.
Preferably, described track is made by joist steel.
Preferably, described taking out press dry pipe and takes out pressure arm employing PPR pipe.
Test method of the present invention, the equipment manufacturing cost of employing is low, installs easily, and is easy to operate, improved the efficient of sampling and the validity of silt content sample, increased the data volume of test figure, improved test accuracy, and work efficiency significantly improves.
Description of drawings:
Fig. 1 is the floor map of the hydraulic model of test method employing of the present invention.
Fig. 2 is the longitudinal profile synoptic diagram of the hydraulic model of test method employing of the present invention.
Among the figure, 1 is track, and 2 are the sampling bridge, 3 is feeler lever, and 4 is stopple coupon, and 5 for touching base plate, 6 is copper pipe, and 7 is water ring vacuum pump, and 8 is gas-holder, 9 for taking out pressure pipe, and 10 are the sampling bucket, and 11 is connection-peg, 12 is water receiving tank, and 13 for dumping water pipe, and 14 is the model body of wall, 15 is cistern, and 16 is clarified water pump, and 17 is stirring pool.
Embodiment:
Xiaolangdi Dam Project is a typical valley type reservoir, and the Xiaolangdi Reservoir model is the important component part of " model the Yellow River ".To hydrometric station, the Sanmenxia Gorge, the about 125km of prototype library segment length, elevation are from 155m to 285m from Xiaolangdi Dam for whole model, and model comprises the tributary storage capacity of the original storage capacity in the master stream of reservoir area 100% and nearly 95%.Behind how much selected guide (horizontal guide 300, vertical scale 60) reduced scales, model is about 440m, the about 15m of model mean breadth, high about 2.4m.
In the two sides of model, the trend with two sides is roughly consistent respectively to fixedly install the trend of 1, two described track 1 of a track respectively.Track 1 can be made by joist steel.According to the length and the boundary condition of reservoir, determine the section quantity that model plan is measured, then, every 50-100m, sampling bridge 2 across the model of reservoir two sides is set, and the width of sampling bridge 2 is a 0.5-1.5 rice, and operating personnel are Operational Test Equipment in the above.Both sides at sampling bridge 2 are set with guide rail (among the figure for illustrating), and described guide rail can adopt the shaped steel of U type or H type to make, and also can adopt the shaped steel of other shapes to make.Two ends at the sampling bridge are provided with carriage, and described carriage can slide on the described track 1 of two sides and on the guide rail of sampling bridge 2 both sides simultaneously, and described slip can provide power by the motor on the carriage.This carriage that the present invention adopts is common mechanical hook-up, those skilled in the art are easy to manufacture and design out, as long as can realize two-way slip on the described track 1 of two sides and on the guide rail of sampling bridge 2 both sides simultaneously, just can realize purpose of the present invention, no longer its concrete structure be elaborated herein.By such slip, operating personnel can handle sampling bridge 2 easily along track 1, move towards the upstream or the downstream of model of reservoir, measure on a plurality of sections that close on.
A metal feeler lever 3 is installed on the guide rail of described sampling bridge 2 upstream sides, described feeler lever 3 is provided with level and vertical adjustment bolt with described guide rail junction, utilize described horizontal adjusting bolt, described feeler lever is moved horizontally along described guide rail, utilize described vertical adjustment bolt, can make described feeler lever vertical moving, like this, on same testing section, can measure the water cut at diverse location, different depth of waters place.Be installed with on described feeler lever 3 and touch base plate 5, it is vertical with feeler lever 3 to touch base plate 5, and the effect of touching base plate 5 is the positions that can make the accurate perception of operating personnel river bed.
On described feeler lever 3 sampler is installed, described sampler comprises an auxiliary staff gauge and four stopple coupons 4.Auxiliary staff gauge is fixed on institute's feeler lever 3, is used to sound the depth of the water; Four described stopple coupons 4 are soft sebific duct, it is hydraulic test rubber hose commonly used, stopple coupon 4 is bundled on the feeler lever 3, the water inlet end of every stopple coupon 4 all is equipped with copper pipe 6, copper pipe 6 length are 5-10cm, the water inlet of four copper pipes 6 is all towards reservoir upland water direction, and the height and position difference of every copper pipe 6 on feeler lever 3, is used for leaving and taking water sample in the different depth of water.The other end of four stopple coupons 4 extends to the outside of model body of wall 14, near place, intake pipe 4 water sides the sampling by-pass valve control is being installed, and is used for beginning or stops sampling.The elevation of intake pipe 4 water sides all should be lower than the elevation of described copper pipe 6.The length of stopple coupon 4 is determined concrete length according to the measuring section boundary condition, and is generally unsuitable long.
Outer setting negative pressure device in model of reservoir, described negative pressure device by water ring vacuum pump 7, gas-holder 8, take out pressure pipe 9 and sampling bucket 10 is formed, water ring vacuum pump 7 connects gas-holder 8, gas-holder 8 connects takes out pressure pipe 9, take out pressure pipe 9 and comprise taking out and press dry pipe and take out the pressure arm, take out and press dry pipe and press arm to be connected, take out and press dry the outside that pipe is laid in model body of wall 14 by threeway with taking out, take out and press arm to be laid in the place of closing on stopple coupon 4 water sides, take out and press the arm entrance point that by-pass valve control is installed; The top of described sampling bucket 10 is provided with two interfaces, and one of them interface presses the endpiece of arm to be communicated with by soft sebific duct with described taking out, and another interface is equipped with the connection-peg 11 that mates with the water side of described sampling pipe 10; In the model wall outer side of closing on stopple coupon 4 water sides water receiving tank 12 is installed, the bottom of described water receiving tank 12 and described sampling bucket 10 all with dump water pipe 13 and be communicated with, be used to drain the water of abandoning of intake pipe 4.
Water ring vacuum pump 7 (abbreviation water ring pump) is a kind of black vacuum pump, and its obtainable end vacuum is 2000-4000Pa, and series connection atmosphere thrower can reach 270-670Pa.Water ring pump also can be used as compressor, is called liquid piston compressor, is the compressor that belongs to low pressure, and its pressure limit is 1-2 * 105Pa gauge pressure.
Through comparative analysis, take out pressure pipe and adopt PPR pipe and PPR pipe fitting thereof.Dumping water pipe is pre-buried pipeline, and a cover backup line can be installed during modelling again, and material adopts the PP pipe.
An amount of water is housed as working fluid in the pump housing.When impeller was pressed among the figure clockwise direction rotation, around water was thrown to by impeller, because action of centrifugal force, water had formed a closed circle that is similar to equal thickness that is decided by the pump chamber shape.The lower part inside surface of water ring is lucky and impeller hub is tangent, and the upper inside surface of water ring just contacts (in fact blade has certain insertion depth in water ring) with blade tip.Form a crescent-shaped space between impeller hub and the water ring this moment, and this space is divided into several loculuses that equate with lobe numbers by impeller.If the bottom with impeller is a starting point for 0 °, the volume of impeller loculus when preceding 180 ° of rotation changes from small to big so, and communicates with air entry on the end face, and this moment, gas was inhaled into, when air-breathing loculus at the end then isolated with air entry; When impeller continued rotation, loculus was compressed gas from large to small; When loculus communicated with exhausr port, gas just was discharged from outside the pump.
Water flushing device is abandoned in setting, and described flusher comprises a clarified water pump 16 and drinking-water pipe, and described clarified water pump 16 is by the clear water in the drinking-water pipe extraction cistern 15, and silts wash in the water pipe 13 to dumping.Alluvial is because stopple coupon 4 is longer, drain water is more in the sampling process, abandoning water enters from stopple coupon 4 and dumps water pipe 13 back flow velocitys and reduce, the silt alluvial, take care of the pence, untimely flushing will be stopped up and be dumped water pipe 13, therefore is provided with and abandons water flushing device, is used to get rid of the alluvial of abandoning water formation in pipe.
In the place of closing on sampling bridge 2, water receiving tank 12 and water ring vacuum pump 7 simple and easy communication device is set respectively, as simple and easy telephone device, electronic pointer or talkback unit etc., the operating personnel that are used for above-mentioned three places get in touch at any time, carry out the cooperation of test, with the continuity of warranty test.
After above-mentioned every testing equipment is ready, come husky field data, carry out discharging water toward model of reservoir according to the reservoir upland water, simulation different flow, different silt contents come the husky situation of water.According to testing requirements, the husky process of inbound/outbound process water, reservoir application since the utilization of analysis-by-synthesis Xiaolangdi Dam Project, consider that the husky condition of demonstration test water should be representative to later stage operational mode research, the husky series of the water in selected in June, 2004 to August is as the husky condition of the water of demonstration test.This period has comprised husky test of the Yellow River accent of water transfer for the third time and the husky process of " 04.8 " flood water.
Open negative pressure device, make to take out to press dry pipe and take out the air pressure of pressing in the arm to reach negative 1 atmospheric pressure.The water side of four stopple coupons 4 is plugged on the connection-peg 11 of sampling bucket 10 successively, open stopple coupon 4 and take out the by-pass valve control of pressing on the arm, under the effect of negative pressure, make in the stopple coupon 4 and be full of muddy water, closing control valve then, the water side of stopple coupon 4 is placed in the water receiving tank 12, in order to sampling.
During sampling, length according to stopple coupon 4, earlier the muddy water in the stopple coupon 4 is drained 20-60 second in water receiving tank 12, make the muddy water emptying of before having saved in the stopple coupon 4, guarantee that the water sample that the back is left and taken is the sampling real-time water sample of reservoir constantly, then, pycnometer is placed in the water receiving tank 12, the water delivering orifice of stopple coupon 4 is placed the proportion bottleneck, utilize pycnometer to carry out the silt content sampling, close the sampling by-pass valve control when pycnometer is full.
By the sampled data analysis, or observing on the model after density current slips into, slipping into the section downstream, should encrypt test, the observation density current arrives the time that each intends measuring section.
After certain hour is carried out in test, start and abandon water flushing device, flushing dumps silt in the water pipe 13.
After every on-test, can not be interrupted, test figure will be with surveying with note.
Utilize simulation experiment method of the present invention, water transfer in 2004 of simulation playback is transferred during the sand, and except that indivedual sections slightly the deviation, all the other each sections and prototype meet better each section different flow of model along Cheng Shuiwei.It all is to increase gradually from top to bottom that flow main cross sections models at different levels and prototype silt content distribute, and the variation tendency of silt content still is all basically identicals of size, illustrates that model simulated preferably with playback prototype.
Test method of the present invention, the sampling equipment of employing, simple in structure, easy operating only needs in the installation process pipeline and pipe fitting are coupled together, and control pressurization valve is housed on the soft sebific duct; Principle is clear, is more suitable for the test of reservoir density current, the technological value height.Pressure source adopts the automatic controlling plumbing fixtures of motor to add negative pressure; The efficient of sampling and the validity of silt content sample have been improved; Easy to operate, increased the quantity of experimental data, for accurately moulding and forecasting that the reservoir density current provides the data support, the overall efficiency of work can improve more than 3 times.
At present, Yellow River mud key lab of Ministry of Water Resources has adopted simulation experiment method of the present invention comprehensively in carrying out the non-engineering measure project of downstream, the Yellow River flood control subtracting silt, obtained good test findings.Guaranteed carrying out smoothly of research of Xiaolangdi Dam Project sediment trapping phase muddy water reservoir and the special Xiaolangdi Dam Project retaining phase efficient sediment transport gordian technique research of Ministry of Water Resources's public welfare, to instructing the solution formulation of Xiaolangdi Dam Project Real-Time Scheduling significant.
The test method of this law can be widely used in the density current simulation test to the numerous valley type reservoir of China, and the operational mode of these reservoirs is had important significance.
Claims (3)
1. a density current model test method and a test unit that is applicable to valley type reservoir is characterized in that, comprises following key step:
(1), select how much suitable guides for use according to field data: horizontal guide 300, vertical scale 60 is set up the reservoir physical model;
(2) in the two sides of model, fixedly install a track (1) respectively, the trend of two described tracks (1) trend with two sides respectively is consistent; Section quantity according to model plan is measured is provided with a plurality of sampling bridges (2) across the model two sides, and sampling bridge (2) width is a 0.5-1.5 rice; Both sides at described sampling bridge (2) are set with guide rail, are provided with carriage at the two ends of described sampling bridge (2), described carriage can be simultaneously along the guide rail slip of described track (1) and sampling bridge (2) both sides;
(3) a metal feeler lever (3) is installed on the guide rail of described sampling bridge (2) upstream side, described feeler lever (3) is provided with level and vertical adjustment bolt with described guide rail junction, utilize described horizontal adjusting bolt, described feeler lever (3) can be moved horizontally along described guide rail, utilize described vertical adjustment bolt, make the described feeler lever (3) can vertical moving; Be installed with on described feeler lever (3) and touch base plate (5), described to touch base plate (5) vertical with feeler lever (3);
(4) go up the installation sampler at described feeler lever (3), described sampler comprises 1 auxiliary staff gauge and 4 stopple coupons (4); Described auxiliary staff gauge is fixed on the described feeler lever (3), is used to sound the depth of the water; 4 described stopple coupons (4) are soft sebific duct, be bundled on the described feeler lever (3), the water inlet end of every described stopple coupon (4) is equipped with copper pipe (6), the water inlet of 4 copper pipes (6) is towards reservoir upland water direction, and the height and position difference of every copper pipe (6) on feeler lever (3) is used for leaving and taking water sample in the different depth of water; The other end of 4 stopple coupons (4) extends to the outside of model body of wall (14), in intake pipe (4) water side the sampling by-pass valve control is installed, and is used for beginning or stops sampling; The elevation of intake pipe (4) water side should be lower than the elevation of described copper pipe (6);
(5) at the outer setting negative pressure device of model of reservoir, described negative pressure device by water ring vacuum pump (7), gas-holder (8), take out pressure pipe (9) and sampling bucket (10) is formed, water ring vacuum pump (7) connects described gas-holder (8), described gas-holder (8) connects the described pressure pipe (9) of taking out, taking out pressure pipe (9) comprises taking out and press dry pipe and take out the pressure arm, taking out to press dry to manage with taking out presses arm to be connected by threeway, take out and press dry the outside that pipe is laid in model body of wall (14), take out and press arm to be laid in the place of closing on stopple coupon (4) water side, take out and press the arm entrance point that by-pass valve control is installed; The top of described sampling bucket (10) is provided with 2 interfaces, and one of them interface presses the endpiece of arm to be communicated with by soft sebific duct with described taking out, and another interface is equipped with the connection-peg (11) with described sampling pipe (4) water side coupling; In model body of wall (14) outside of closing on stopple coupon (4) water side 1 water receiving tank (12) is installed, the bottom of described water receiving tank (12) and described sampling barrel (10) all with dump water pipe (13) and be communicated with, be used to drain the water of abandoning of intake pipe;
(6) water flushing device is abandoned in setting, described flusher comprises a clarified water pump (16) and drinking-water pipe, described clarified water pump (16) extracts clear water in the cistern (15) by drinking-water pipe, and what be used for flushing sampling bucket (10) and water receiving tank (12) abandons deposit silt in dumping water pipe (13) of water;
(7) in the place of closing on sampling bridge (2), water receiving tank (12) and water ring vacuum pump (7) simple and easy communication device is set respectively, the operating personnel that are used for above-mentioned three places get in touch at any time, carry out the cooperation of test;
(8) come husky field data according to the reservoir upland water, carry out model of reservoir and discharge water;
(9) open negative pressure device, make to take out to press dry pipe and take out the air pressure of pressing in the arm to be negative 1 atmospheric pressure; 4 stopple coupons (4) water side is plugged into successively on the connection-peg (11) of sampling bucket (10), open stopple coupon (4) and take out the by-pass valve control of pressing arm, under the effect of negative pressure, make in the stopple coupon (4) and be full of muddy water, closing control valve is placed on stopple coupon (4) water side in the water receiving tank (12) then;
When (10) taking a sample, length according to stopple coupon (4), earlier the muddy water in the stopple coupon (4) is drained 20-60 second in water receiving tank (12), make the muddy water emptying of before having saved in the stopple coupon (4), guarantee that each sampling is real-time silt content sampling, then, pycnometer is placed in the water receiving tank (12), stopple coupon (4) water delivering orifice is placed the proportion bottleneck, utilize pycnometer to carry out the silt content sampling, close the sampling by-pass valve control when pycnometer is full;
(11) by test data analyzer, perhaps,, should encrypt test slipping into the section downstream observing on the model after density current slips into, the observation density current arrives the time that each intends measuring section;
(12) after certain hour is carried out in test, start and abandon water flushing device, flushing dumps the interior silt of water pipe (13).
2. a kind of density current model test method that is applicable to valley type reservoir according to claim 1 is characterized in that described track (1) is made by joist steel.
3. a kind of density current model test method that is applicable to valley type reservoir according to claim 1 is characterized in that, described taking out press dry pipe and take out pressure arm employing PPR pipe.
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| CN106017426B (en) * | 2016-05-06 | 2018-07-06 | 浙江大学 | The Forecasting Methodology of formula density current separation depth is opened a sluice gate in linear stratified water environment |
| CN106017426A (en) * | 2016-05-06 | 2016-10-12 | 浙江大学 | Method for predicting gate opening type density flow separation depth in linear stratified water environment |
| CN106886652A (en) * | 2017-03-09 | 2017-06-23 | 武汉大学 | Reservoir on hyperconcentration river muddy water free flow and density current coupled simulation method |
| CN108385600A (en) * | 2018-01-18 | 2018-08-10 | 河海大学 | The lateral straight tube inlet method of the open double water of river model test |
| CN108398237A (en) * | 2018-04-26 | 2018-08-14 | 浙江大学 | It is a kind of to simulate the experimental rig and method that density current moves in valley |
| CN109537521A (en) * | 2018-11-25 | 2019-03-29 | 中国船舶重工集团公司第七〇九研究所 | A kind of removable passageway of achievable large range displacement compensation |
| CN109537521B (en) * | 2018-11-25 | 2023-11-24 | 中国船舶重工集团公司第七一九研究所 | Detachable aisle capable of realizing large-range displacement compensation |
| CN110158536A (en) * | 2019-06-21 | 2019-08-23 | 黄河水利委员会黄河水利科学研究院 | A kind of more tributary reservoir density current simulation test devices and more tributary reservoir density current experimental methods |
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