CN104142223A - Small-scale solidified cohesive sediment incipient motion measuring system - Google Patents
Small-scale solidified cohesive sediment incipient motion measuring system Download PDFInfo
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- CN104142223A CN104142223A CN201310168885.1A CN201310168885A CN104142223A CN 104142223 A CN104142223 A CN 104142223A CN 201310168885 A CN201310168885 A CN 201310168885A CN 104142223 A CN104142223 A CN 104142223A
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Abstract
Disclosed is a small-scale solidified cohesive sediment incipient motion measuring system. Water circulation and flow control are finished through a pipeline system, the function of continuously supplying soil samples along with scour development is achieved through a soil sample cylinder and a soil ejection device, and the flow rate and sediment motion are measured through a DANTEC two-dimensional PIV speed measuring system. The small-scale solidified cohesive sediment incipient motion measuring system has the advantages of the small scale, high precision and high practicability.
Description
Affiliated technical field
The present invention relates to utilize organic glass tube to form the small-sized measuring system of fixed Cohesive Sediment starting in conjunction with DANTEC2 dimension PIV velocity-measuring system.
Background technology
Cohesive Sediment is occupied a part of proportion in heavily silt-carrying river, (to comprise riverbed, riverbank and beach), and simultaneously it is also present in reservoir, Hekou Area in a large number, and under these regional current factor effects consolidation gradually.The starting of Cohesive Sediment is different from non-sticky silt, and it is relevant with consolidation condition, and is subject to multifactorial impacts the such as silt material composition, physicochemical property.
Wash away in problem in Cohesive Sediment starting at present, most of researcher adopts the method for artificial paving sand to wash away and carried out more research the starting of new silt Cohesive Sediment, and consolidation lasts length, the difference of Sediment Siltation consolidation characteristics is just obvious, and artificial paving is husky also has a certain distance with natural accretion; Some researcher has carried out more research by sampling to fixed Cohesive Sediment or viscosity undisturbed soil on the spot, but due to different regions Cohesive Sediment consolidation condition difference, and sampling is unavoidably to soil sample disturbance to some extent on the spot, cause sampling difference larger, make the randomness of testing data, be difficult to draw more regular achievement.In fixed Cohesive Sediment starting research process, need small and exquisite, practical, effective measuring system badly.
Summary of the invention
For meeting the correlation parameter in the fixed Cohesive Sediment starting process of needs, simple and effective measurement of studying fixed Cohesive Sediment starting problem, the invention provides a kind of fixed Cohesive Sediment small-sized, practical, that measurement accuracy is high and start measuring system.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention is by overflow means, soil sample placing device, measuring equipment, and composition and the function of various piece are as follows:
Overflow means is the rectangular water tubes of an organic glass material, realizes the function of water circulation and flow control.
Soil sample placing device mainly contains soil sample tube and pushes up native device and forms, and realizes with washing away and develops the function that continues supply soil sample.
Measuring equipment is mainly DANTEC2 dimension PIV velocity-measuring system, the tabula rasa that enters that mainly contains laser instrument, camera, computing machine and glass material forms, realize the measurement of flow velocity and sediment movement, specific works flow process is as follows: laser instrument transmitting illuminant enters into tabula rasa and forms measurement plane, two cameras carry out side image data acquisition, and computing machine carries out storage and the processing of view data.
This measuring equipment has following characteristics:
(1) miniaturization.Change the experiment research of tradition to silt basic exercise rule, do not re-use common open channel tank and annular water tank, adopt the organic glass pipe tank of sealing to start the experimental provision washing away as fixed Cohesive Sediment, compare existing experimental apparatus, can effectively reduce the volume of experimental facilities, under the prerequisite that realizes set objective, there is the cost of minimizing, simple advantage is set.
(2) measurement accuracy is high.The measurement of flow velocity and sediment movement speed adopts DANTEC2 dimension PIV velocity-measuring system, this system has that measuring accuracy is high, sample frequency Automatic Optimal and the advantage such as spatial resolution is high, measurement range is wide, to solve the powerful of measuring flow field under various unconventional flow fields or complex flowfield condition, for the measuring accuracy improving in fixed Cohesive Sediment starting research provides technical support.
(3) practicality.Interpretation of result by experiment, the measurement achievement of this small-sized measuring system can be used as the Experiment Result of fixed Cohesive Sediment starting experimental study.
Brief description of the drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further illustrated:
Fig. 1 is work schematic diagram of the present invention
Adopt the organic glass pipe tank of sealing to start the experimental provision washing away as fixed Cohesive Sediment.Sealing flume is the rectangular cross section of 3cm × 12cm (being high 3cm, wide 12cm), and tank is long is 2.0m.When experiment, sediment sample is placed in soil sample tube of the same size with it, and soil sample tube internal diameter is 7cm, and central point is 1.2m apart from import, apart from outlet 0.8m.The native device in top, soil sample tube below is a rubber piston, in experimentation, adopt hand-operated lifting screw rod to control rubber piston, thereby can adjust the height of sediment sample in soil sample tube with the situation of washing away of current according to sediment sample, its surface is flushed with bottom of gullet.The glass material that one 3cm × 20cm is placed in rectangular water tubes cavity the inside following current directly over soil sample tube enters tabula rasa, laser instrument transmitting illuminant enters into tabula rasa and forms measurement plane, two cameras carry out side image data acquisition, and computing machine carries out storage and the processing of view data.
Claims (2)
1. a small-sized fixed Cohesive Sediment starting measuring system, measure and obtain relevant data by washing away of fixed Cohesive Sediment soil sample, it is characterized in that: complete the circulation of current and the control of flow by piping system, by soil sample tube and push up native device and realize with the Erosion Length that washes away development and continue function and the measurement soil sample of supply soil sample, tie up PIV velocity-measuring system and realize the measurement of flow velocity and sediment movement by DANTEC2.
2. small-sized fixed Cohesive Sediment starting measuring system according to claim 1, there is miniaturization, high precision, practical feature, the high precision that is mainly reflected in the small and exquisite and DANTEC2 dimension PIV velocity-measuring system of experimental provision, experimental result meets the needs of fixed Cohesive Sediment starting research.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310168885.1A CN104142223A (en) | 2013-05-10 | 2013-05-10 | Small-scale solidified cohesive sediment incipient motion measuring system |
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| CN201310168885.1A CN104142223A (en) | 2013-05-10 | 2013-05-10 | Small-scale solidified cohesive sediment incipient motion measuring system |
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| CN104142223A true CN104142223A (en) | 2014-11-12 |
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| CN201310168885.1A Pending CN104142223A (en) | 2013-05-10 | 2013-05-10 | Small-scale solidified cohesive sediment incipient motion measuring system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596584A (en) * | 2015-01-23 | 2015-05-06 | 清华大学 | Device for in-situ real-time measurement of cobble movement in test model or natural river |
| CN104634538A (en) * | 2015-02-03 | 2015-05-20 | 哈尔滨工业大学（威海） | Experiment device for measuring flow resistance of flat panel |
| CN105841920A (en) * | 2016-03-23 | 2016-08-10 | 河海大学 | Riverbed bed load vertical section separating model test device and use method thereof |
| CN106645791A (en) * | 2017-02-13 | 2017-05-10 | 常州大学 | Orifice jet velocity measuring experimental device suitable for multi-field coupling condition |
| CN108534985A (en) * | 2018-03-13 | 2018-09-14 | 河海大学 | Intertidal zone sediment incipient motion measuring device and its measurement method |
| CN108982271A (en) * | 2018-07-20 | 2018-12-11 | 河海大学 | A kind of experimental rig and test method for simulating soil body contact scour development process |
| CN109029916A (en) * | 2018-09-21 | 2018-12-18 | 河海大学 | A kind of self feed back silt underwashing rate measuring system and measurement method |
| CN110146396A (en) * | 2019-05-22 | 2019-08-20 | 河海大学 | Measure the device and method of the anti-current scour erosion performance of the cementing soil body of microorganism |
| CN112798221A (en) * | 2020-12-07 | 2021-05-14 | 河海大学 | Method for calculating starting shear stress of viscous silt bed surface based on agglomeration starting mechanism |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596584A (en) * | 2015-01-23 | 2015-05-06 | 清华大学 | Device for in-situ real-time measurement of cobble movement in test model or natural river |
| CN104596584B (en) * | 2015-01-23 | 2017-01-25 | 清华大学 | Device for in-situ real-time measurement of cobble movement in test model or natural river |
| CN104634538A (en) * | 2015-02-03 | 2015-05-20 | 哈尔滨工业大学（威海） | Experiment device for measuring flow resistance of flat panel |
| CN105841920A (en) * | 2016-03-23 | 2016-08-10 | 河海大学 | Riverbed bed load vertical section separating model test device and use method thereof |
| CN106645791A (en) * | 2017-02-13 | 2017-05-10 | 常州大学 | Orifice jet velocity measuring experimental device suitable for multi-field coupling condition |
| CN106645791B (en) * | 2017-02-13 | 2019-03-22 | 常州大学 | It tests the speed experimental provision suitable for the orifice jet under the conditions of multi- scenarios method |
| CN108534985A (en) * | 2018-03-13 | 2018-09-14 | 河海大学 | Intertidal zone sediment incipient motion measuring device and its measurement method |
| CN108982271A (en) * | 2018-07-20 | 2018-12-11 | 河海大学 | A kind of experimental rig and test method for simulating soil body contact scour development process |
| CN109029916A (en) * | 2018-09-21 | 2018-12-18 | 河海大学 | A kind of self feed back silt underwashing rate measuring system and measurement method |
| CN110146396A (en) * | 2019-05-22 | 2019-08-20 | 河海大学 | Measure the device and method of the anti-current scour erosion performance of the cementing soil body of microorganism |
| CN112798221A (en) * | 2020-12-07 | 2021-05-14 | 河海大学 | Method for calculating starting shear stress of viscous silt bed surface based on agglomeration starting mechanism |
| CN112798221B (en) * | 2020-12-07 | 2021-12-14 | 河海大学 | Method for calculating starting shear stress of viscous silt bed surface based on agglomeration starting mechanism |
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