CN203587317U - Artificial liquefaction flushing testing apparatus - Google Patents
Artificial liquefaction flushing testing apparatus Download PDFInfo
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- CN203587317U CN203587317U CN201320783435.9U CN201320783435U CN203587317U CN 203587317 U CN203587317 U CN 203587317U CN 201320783435 U CN201320783435 U CN 201320783435U CN 203587317 U CN203587317 U CN 203587317U
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Abstract
The utility model provides an artificial liquefaction flushing testing apparatus. When testing is carried out, a valve connected to a water tank is opened, so that a water flow flows at the silt surface inside a rectangular groove; and at this time, the silt is only affected by the dragging force and the uplift force of the water flow. The flow is increased gradually and the state of the silt surface is observed; when the silt just appears and is washed away by the water flow, a relation between the needed water yield and the silt flushing amount within the certain time is established. When the artificial vertical liquefaction technology is used to reduce the starting stress and the starting flow rate of the silt, the valve connected to the water tank is opened and then the lower-portion pressure leakage pipe is opened, and the certain pressure is applied. When the silt just appears and is washed away by the water flow, the relation between the needed water yield and the silt flushing amount within the certain time is established. On the basis of comparison validation, the artificial vertical liquefaction technology is utilized to realize high-efficient accumulated silt washing under the circumstances that the flow is low, thereby reducing the water consumption amount and providing a scientific basis for the silt accumulation problem in the water conservancy project construction.
Description
Technical field
The utility model relates to the test unit of hydraulic engineering, is particularly useful for the test of LIQUEFACTION APPLICATION OF THE TECHNIQUE sand surfing.
Background technology
Along with some large reservoirs and important river course after building in the short time Sediment Siltation comparatively serious, affect the water-holding capacity of reservoir and the conveyance capacity in river course, how to carry out efficient sand discharge and become a current important subject.People mainly take " block, arrange, adjust, put, dig " comprehensive control measures in sand control practice in recent years, also the measures such as " flow-sediment regulation ", density current sand discharge have been taked, in theoretical analysis and application in practice, obtained a collection of important achievement in research, but the transportability of sediments of current is still lower, for the fully fixed soil body, especially muck soil, the drag while only depending on flow and uplift force starting silt are more difficult, and scouring effect is not obvious, water consumption is more." clearing sands with converging flow, forced erosion, Gao Qu draw sand " technology that some hydraulic engineerings are at present taked, the concentrated water yield is dropped, and washes away river channel sedimentation silt, carried out preliminary trial, but its cost is to carry 1t sand approximately to need 40m for solving " kind silt " problem
3water, show that " flow-sediment regulation " do not improve the transportability of sediments of current significantly, its reason is that flow-sediment regulation technology is not broken away from the principle of utilizing current top layer drag and uplift force starting silt, can be under the condition of normal work, effectively solve the few present situation of husky many water, reaching the sand surfing object of high-efficiency water-saving, is a very good problem to study.
The utility model has designed artificial sand surfing liquefaction test device, utilize artificial vertical liquefaction technology to reduce the principle that plays dynamic stress and initial velocity of silt, research also can realize efficient sand surfing in the situation that of low flow velocity low discharge, greatly save sand surfing water, for the efficient sand discharge of hydraulic engineering provides foundation.
Summary of the invention
The purpose of this utility model is: by the test unit providing, checking artificial vertical liquefaction technology improves the imagination of sand surfing efficiency, for the efficient sand discharge of hydraulic engineering provides scientific basis.
The purpose of this utility model is achieved in that LIQUEFACTION APPLICATION OF THE TECHNIQUE sand surfing test unit, and device regulates water injection valve 13 to form by tank 1, compressive force leak canal 2, upper water box 3, lower header 4, permeable dividing plate 5, multistage sand basin 6, water pump 7, valve 8, flow valve 9, pressurized equipment 10, pressure water tank 11, tensimeter 12, pressure; Tensimeter 12, pressure adjusting water injection valve 13 and the pipeline that is connected pressurized equipment 10 are installed at the top of the pressure water tank 11 of test unit; Left upper portion in tank 1 arranges upper water box 3, and right side arranges lower header 4, wherein in the bottom, left side of lower header 4, permeable dividing plate 5 is set; Between lower header 4 and upper water box 3, at the middle part of tank 1, be fixed wtih diaphragm plate, lay compressive force leak canal 2 above, wherein Bonding pressure oozes on pipe 2 and the pipeline of pressure water tank 11 flow valve 9 is installed; Uniform settling basin 6 between the water pump 7 of the setting of tank 1 bottom and permeable dividing plate 5 arranges vertical clapboard on settling basin 6, and wherein vertical clapboard is fixed in respectively the bottom surface of tank 1; On the external pipeline that connects water pump 7 and upper water box 3, valve 8 is installed.
Principle of work of the present utility model: traditional concept thinks that it is a kind of harm to engineering that seepage force makes the soil body produce seepage deformation, routine always adopts variety of way prevented or control, seldom how consideration utilizes native seepage deformation to process the practical problems in engineering, and this device has been broken traditional concept, the mode of pressurizeing by artificial pipe laying, at the inner excess pore water pressure that produces of silt, make sand grain produce liquefaction and in suspended state, cause effective unit weight to decline, finally make sediment incipient motion shearing stress and initial velocity decline, at low flow velocity, in the situation of low discharge, also can realize efficient sand surfing, improve the transportability of sediments of current.
The utility model, for the test of research transportability of sediments provides best experiment porch, has obtained when not opening bottom compressive force leak canal silt and being taken away by current the relation of required flow velocity and flow and the silt amount of going out; When opening bottom compressive force leak canal silt and being taken away by current, the relation of required flow velocity and flow and the silt amount of going out; Top flow velocity is certain, when silt is pulled away, and the required relation that pressure and shoal materials thickness are provided of bottom compressive force leak canal; Bottom compressive force leak canal provides pressure one timing, the relation between Sediment Siltation thickness and required flow rate; This quantizating index has important using value, shows technical progress.
Accompanying drawing explanation
The utility model is described further by reference to the accompanying drawings.
Accompanying drawing is the structural representation of this test unit;
As shown in the figure: 1-tank, 2-compressive force leak canal, 3-upper water box, 4-lower header, the permeable dividing plate of 5-, the multistage sand basin of 6-, 7-water pump, 8-valve, 9-flow valve, 10-pressurized equipment, 11-pressure water tank, 12-tensimeter, 13-pressure regulate water injection valve.
Embodiment
The utility model is described further in conjunction with the embodiments.
Embodiment
Device design: tensimeter, pressure adjusting water injection valve and the pipeline that is connected pressurized equipment are installed at the top of the pressure water tank of test unit; Left upper portion in tank arranges upper water box, and right side arranges lower header, wherein in the bottom, left side of lower header, permeable dividing plate is set; Between lower header and upper water box, at the middle part of tank, be fixed wtih diaphragm plate, lay compressive force leak canal above, wherein Bonding pressure oozes on pipe and the pipeline of pressure water tank flow valve is installed; Uniform settling basin between the water pump of the setting of tank bottom and permeable dividing plate arranges vertical clapboard on settling basin, and wherein vertical clapboard is fixed in respectively the bottom surface of tank; On the external pipeline that connects water pump and upper water box, valve is installed.
The tank of described device is rectangle.
Uniform stepped vertical clapboard in the settling basin of described device.
Essential implementation:
1) upper water box: in feed trough, silt upstream provides stable water source; In water tank right side partition, there is uniform circular hole, so that current flow in the silt of bottom equably;
2) lower header: be used for storing water and the silt gone out in rectangular channel, realize the deposition of silt in tank simultaneously;
3) permeable dividing plate: reduce the water delivery case of the silt inflow bottom in lower header, realize the first filtration to silt;
4) multistage sand basin: formed by the multistage dividing plate progressively highly reducing, realize step by step the barrier effect to silt, reach the effect of further filtration;
5) water pump: after step sand basin water purification, water is evacuated to upper water box, realizes recycling of water resource;
6) valve: for controlling the current size of silt top layer sand surfing;
7) flow valve: the aquifer yield that oozes pipe for controlled pressure;
8) pressurized equipment (high slope pressure tank or the pressure water tank with air compressor machine): provide test required pressure head to seepage pressure pipe laying;
9) pressure water tank: for a stable pressure source is provided to compressive force leak canal;
10) tensimeter: be used for showing pressure head;
11) the pressure-regulating valve water injection valve of holding concurrently: be used for regulating the size of pressure head and toward water filling in pressure water tank.
Concrete operation steps:
1) Rectangular Water Trough is set, inside arranges diaphragm plate, lays compressive force leak canal on diaphragm plate, then on compressive force leak canal, lays silt, and laying depth is 5cm first, and it is deposited in water, according to the needs of experimental study, progressively adds the thickness of silt.
2) then open the valve of controlling water flow on upper water box, make sandy soil discharging consolidation, the pore water of observation sandy soil changes, observe the sedimentation and deformation on sandy soil surface simultaneously, choose the position of six points and observe, within every 1 hour, measure once, when the deflection of continuous three times is not more than 2mm, the preliminary excess pore water stress of determining inside soil body is zero, and surface settlement tends towards stability, and silt is substantially fixed.
3) open water injection valve closes after water filling in pressure water tank, then open the switch of air compressor machine, carry out repressing, by variable valve, make the pressure of pressure water tank reach stationary value, be 0.5KPa, now tensimeter can show pressure head, open flow valve, controlled pressure oozes the aquifer yield in pipe, makes mineralization pressure water source, silt bottom, thereby produces excess pore water pressure; If provide pressure enough large, make sand grain produce liquefaction and in suspended state, now above pipe laying, occur " sand boils " phenomenon;
4) in upper water box, add water, making water surface elevation in water tank is 10cm, makes current in rectangular channel, form stabilization of fluidized simultaneously; And start water pump, and by the size of flow regulating valve control current, the sand grain after liquefaction is just washed away by current, after stablizing by a period of time, the flow velocity while measuring sand grain starting, the sand surfing amount in calculating 2h and the relation between water consumption;
5) close the compressive force leak canal of bottom, to silt, do not provide bottom pressure water source, under original flow conditions, silt can not be flushed away; Progressively strengthen the flow of upper tank, when sand grain just also moves with current, stop enlargement discharge, after a period of stabilisation, the flow velocity while measuring sand grain starting calculates the relation between the interior sand surfing amount of 2h and water consumption simultaneously; It is compared, analyze by after compressive force leak canal effect, impact the water-saving result of certain content silt.
The material of device:
Rectangular Water Trough, the water tank that the utility model is made, the material of dividing plate are poly (methyl methacrylate) plate, according to concrete size cutting, are bonded.
Claims (3)
1. LIQUEFACTION APPLICATION OF THE TECHNIQUE sand surfing test unit, is characterized in that: device regulates water injection valve (13) to form by tank (1), compressive force leak canal (2), upper water box (3), lower header (4), permeable dividing plate (5), multistage sand basin (6), water pump (7), valve (8), flow valve (9), pressurized equipment (10), pressure water tank (11), tensimeter (12), pressure; Tensimeter (12), pressure adjusting water injection valve (13) and the pipeline that is connected pressurized equipment (10) are installed at the top of the pressure water tank (11) of test unit; Left upper portion in tank (1) arranges upper water box (3), and right side arranges lower header (4), wherein in the bottom, left side of lower header (4), permeable dividing plate (5) is set; Between lower header (4) and upper water box (3), at the middle part of tank (1), be fixed wtih diaphragm plate, lay compressive force leak canal (2) above, wherein Bonding pressure oozes on the pipeline of pipe (2) and pressure water tank (11) flow valve (9) is installed; Uniform settling basin (6) between the water pump (7) of the setting of tank (1) bottom and permeable dividing plate (5) arranges vertical clapboard on settling basin (6), and wherein vertical clapboard is fixed in respectively the bottom surface of tank (1); On the external pipeline that connects water pump (7) and upper water box (3), valve (8) is installed.
2. install according to claim 1, it is characterized in that: the tank (1) of device is rectangle.
3. device according to claim 1, is characterized in that: uniform stepped vertical clapboard in the settling basin (6) of device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320783435.9U CN203587317U (en) | 2013-12-02 | 2013-12-02 | Artificial liquefaction flushing testing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320783435.9U CN203587317U (en) | 2013-12-02 | 2013-12-02 | Artificial liquefaction flushing testing apparatus |
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| CN203587317U true CN203587317U (en) | 2014-05-07 |
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| CN201320783435.9U Expired - Fee Related CN203587317U (en) | 2013-12-02 | 2013-12-02 | Artificial liquefaction flushing testing apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977149A (en) * | 2015-07-06 | 2015-10-14 | 中国矿业大学 | Simulated test apparatus and method for flow and sediment transport |
| CN106759072A (en) * | 2017-03-09 | 2017-05-31 | 长江水利委员会长江科学院 | Take into account the river model drainage system and method for designing of bed surface stability and Quick drainage |
| CN108680342A (en) * | 2018-07-09 | 2018-10-19 | 长江大学 | A kind of sand body sedimentation simulation pressue device |
-
2013
- 2013-12-02 CN CN201320783435.9U patent/CN203587317U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977149A (en) * | 2015-07-06 | 2015-10-14 | 中国矿业大学 | Simulated test apparatus and method for flow and sediment transport |
| CN104977149B (en) * | 2015-07-06 | 2016-04-20 | 中国矿业大学 | The husky transported simulation test unit of a kind of water and method |
| CN106759072A (en) * | 2017-03-09 | 2017-05-31 | 长江水利委员会长江科学院 | Take into account the river model drainage system and method for designing of bed surface stability and Quick drainage |
| CN108680342A (en) * | 2018-07-09 | 2018-10-19 | 长江大学 | A kind of sand body sedimentation simulation pressue device |
| CN108680342B (en) * | 2018-07-09 | 2023-08-29 | 长江大学 | Sand body subsides simulation pressurizing device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20141202 |
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| EXPY | Termination of patent right or utility model |