CN204116185U - Porous pavement rain flood runoff is similar to experiment simulator - Google Patents
Porous pavement rain flood runoff is similar to experiment simulator Download PDFInfo
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- CN204116185U CN204116185U CN201420535082.5U CN201420535082U CN204116185U CN 204116185 U CN204116185 U CN 204116185U CN 201420535082 U CN201420535082 U CN 201420535082U CN 204116185 U CN204116185 U CN 204116185U
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Abstract
The utility model discloses a kind of porous pavement rain flood runoff and be similar to experiment simulator, comprise a tank, the support that one can regulate the porous pavement model gradient is provided with in the bottom of tank, a porous pavement model is provided with in tank, a porous pavement model is provided with in tank, the back up pad extending to tank head and afterbody is provided with at the head of porous pavement model and afterbody, drainpipe is provided with in the bottom of back up pad, and the back up pad being positioned at tank entry position is provided with the device causing vortex and bubble for reducing streamflow regime change, device is formed by suction pipe array, the head of tank be provided with one with the water tank I of its inner constant head is communicated with, be provided with a water tank II be communicated with its inside at the afterbody of tank, the water in water tank I, II by water pump at Experimental mimic system internal circulation flow, a set of particle velocimetry for measuring velocity field is provided with above porous pavement model.
Description
Technical field
The utility model relates to the determination that a kind of porous pavement rain flood runoff is similar to test simulation method, belongs to field of civil engineering.
Background technology
Porous pavement, also referred to as porous pavements, comprises pervious concrete pavement and OGFC (open-shelf range) bituminous pavement etc., has a large amount of connectivity holes in coarse aggregate skeleton inside.The high pore texture of water-permeable pavement can allow rainwater effectively permeate the ground, and reduces city overland runoff.Under sustainable development idea instructs, the application of China's porous pavement engineering research in recent years develops rapidly, and this plays huge effect by solution metropolitan city impeded drainage problem.Coarse porous pavement has very large impact to the Free Surface runoff on it and the flow characteristics near road surface and momentum transfer.The depth of water of the function influence rainwash of these complexity and flow velocity, and will greatly affect runoff and carry the ability of silt, but the research of this aspect is relatively less at present, is therefore necessary to carry out more deep research to the flow phenomenon of this complexity.
Utility model content:
In order to solve the shortcoming existed in prior art, the utility model proposes a kind of porous pavement rain flood runoff and be similar to test simulation method, the interaction of the method for approximate simulation to porous pavement and rain flood runoff is utilized to carry out comprehensive research, the parameters such as flow, seepage discharge, the gradient that become a mandarin with the methods analyst of numerical simulation are by experiment satisfied the need and are shown the impact of rain flood runoff, for the hydraulics improving porous pavement lays the foundation, set up a kind of porous pavement rain flood runoff and be similar to experiment simulator, determine rain flood runoff approximate simulation test method.
The technical solution adopted in the utility model is as follows:
A kind of porous pavement rain flood runoff is similar to experiment simulator, comprise a tank, the support that one can regulate the porous pavement model gradient is provided with in the bottom of described tank, a porous pavement model is provided with in described tank, a porous pavement model is provided with in described tank, the back up pad extending to tank head and afterbody is provided with at the head of porous pavement model and afterbody, drainpipe is provided with in the bottom of back up pad, and the back up pad being positioned at tank entry position is provided with the device causing vortex and bubble for reducing streamflow regime change, described device is formed by suction pipe array, the head of tank be provided with one with the water tank I of its inner constant head is communicated with, be provided with a water tank II be communicated with its inside at the afterbody of tank, the water in water tank I, II by water pump at Experimental mimic system internal circulation flow, a set of particle velocimetry for measuring velocity field is provided with above porous pavement model, current (Q) flow through the structure being arranged on tank middle part approximate simulation porous pavement subsequently, a part of current (Q
1) drainpipe of bottom is penetrated into through porous pavement, and all the other current (Q
2) flow directly into water tank along road surface.
The pipeline be communicated with between the head of described tank and the water tank I of constant head is provided with variable valve.
The bottom of described water tank II is provided with an electronic balance.
Described porous pavement model, comprises the porous pavement be made up of by cubic close stacked arrangement magnetic stainless steel ball, the pervious bed be made up of man-made fiber under described porous pavement, is back up pad with holes below pervious bed.
At described porous pavement model bottom by shore supports, and the current that porous pavement infiltrates by a drainpipe are set in the downstream end of porous pavement model discharge tank.
Described porous pavement moulded dimension is 201mm × 30mm × 9mm; The magnetic stainless steel ball being 3mm by 2010 diameters forms by cubic close stacked arrangement, its porosity 47.64%.
The back up pad at the forward and backward two ends of porous pavement model is covered with one deck magnetic ball, makes upstream and downstream tank and porous pavement be in sustained height.
Described particle velocimetry, comprises laser light sheet, high speed camera, time schedule controller and computing machine; Described laser light sheet is arranged on directly over porous pavement, provides light source for giving the flow field near porous pavement; Described high speed camera is arranged on the side of porous pavement, for taking the flow field situation on porous pavement; Described time schedule controller is used for the shooting of cooperation control lasing light emitter and high speed camera; The image of high speed camera shooting is sent to computing machine and carries out velocity field analysis.
Described tank is the organic glass tank of 200cm (length) × 3cm (wide) × 8.5cm (height), and both direction has fine visual angle.
Described straw diameter is 5mm, long 10cm.
Water in described water tank I, II by water pump at Experimental mimic system internal circulation flow.
The test method that porous pavement rain flood runoff is similar to experiment simulator is as follows:
Step (1) gradient of motor adjustment porous pavement analogue means;
Step (2) is opened water pump and recirculated water is injected constant water header tank, utilize variable valve and electronic balance adjustment become a mandarin flow and infiltrate flow.
Step (3), after waterflow stabilization, utilizes PIV systematic survey velocity field, and analyzes the flow field change in tank near porous pavement according to measured velocity field;
Step (4) changes the gradient, become a mandarin the variable such as flow and infiltration flow, repeats step 1 ~ 3.
The two two field picture of each experiment collection 100 groups, the time between two frames of one group of two two field picture is 500 μ s.The size of the particle that PIV uses is approximately 50 μm.
The beneficial effects of the utility model are as follows:
The utility model is of a size of in the organic glass tank of 200cm (length) × 3cm (wide) × 8.5cm (height) at one and carries out, and both direction has fine visual angle.Tank is placed on smooth marble surface, is supported by the steel frame construction of gradient adjustable, and the gradient of steelframe is regulated by motor.Water is injected into the water tank of a constant head, and then arrive tank entrance, it is 5mm that a series of diameter is placed in tank porch, and the device of the suction pipe array of long 10cm reduces the vortex that causes due to streamflow regime change and bubble etc.
Current (Q) flow through the structure being arranged on tank middle part approximate simulation porous pavement subsequently, a part of current (Q
1) drainpipe of bottom is penetrated into through porous pavement, and all the other current (Q
2) flow directly into water tank along road surface.Water in water tank by water pump at Experimental mimic system internal circulation flow.
The porous pavement rain flood runoff that the utility model proposes is similar to test simulation method, utilize the interaction of the method for approximate simulation to porous pavement and rain flood runoff to carry out comprehensive research, the parameters such as flow, seepage discharge, the gradient that become a mandarin with the methods analyst of numerical simulation are by experiment satisfied the need and are shown the impact of rain flood runoff.For the hydraulics improving porous pavement lays the foundation, set up a kind of porous pavement rain flood runoff and be similar to experiment simulator, determine rain flood runoff approximate simulation test method.
Accompanying drawing explanation
Fig. 1 porous pavement rain flood runoff is similar to experimental simulation device;
The approximate simulation device of Fig. 2 (a)-Fig. 2 (b) porous pavement;
Two two field pictures that Fig. 3 (a)-Fig. 3 (b) one group of PIV obtains;
Porous pavement runoff velocity curve under Fig. 4 different gradient;
Fig. 5 difference becomes a mandarin porous pavement runoff velocity curve under flow;
In figure: 1, the water tank I of constant head; 2, variable valve; 3, high speed camera; 4, porous pavement model; 5, laser light sheet; 6, water tank II; 7, water pump, 8 tanks, 9 suction pipe arrays, 4-1, porous pavement; 4-2, pervious bed; 4-3, hole; 4-4, pillar; 4-5, drainpipe, 4-6 plastic plate.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail:
Porous pavement rain flood runoff is similar to experimental simulation device, through repetition test demonstration, determines porous pavement rain flood runoff and is similar to experimental simulation device, as shown in Figure 1.
This test is of a size of in the organic glass tank 8 of 200cm (length) × 3cm (wide) × 8.5cm (height) at one to be carried out, and both direction has fine visual angle.Tank 8 is placed on smooth marble surface, is supported by the steel frame construction of gradient adjustable, and the gradient of steelframe is regulated by motor.Water is injected into the water tank I1 of a constant head, then by arriving tank 8 entrance after variable valve 2, it is 5mm that a series of diameter is placed in tank 8 porch, and the device of the suction pipe array 9 of long 10cm reduces the vortex that causes due to streamflow regime change and bubble etc.
A porous pavement model 4 is provided with in tank 8, the plastic plate 4-6 extending to tank head and afterbody is provided with at the head of porous pavement model 4 and afterbody, drainpipe 4-5 is provided with in the bottom of plastic plate 4-6, and the plastic plate being positioned at tank entry position is provided with the device causing vortex and bubble for reducing streamflow regime change, described device is formed by suction pipe array 9; The afterbody of tank be provided with one with its inner water tank II6 be communicated with, the water in water tank I, II by water pump at Experimental mimic system internal circulation flow; The bottom of water tank II is provided with an electronic balance, is provided with a set of particle velocimetry for measuring velocity field above porous pavement model 4;
Current (Q) flow through the structure being arranged on tank middle part approximate simulation porous pavement subsequently, a part of current (Q
1) drainpipe of bottom is penetrated into through porous pavement, and all the other current (Q
2) flow directly into water tank along road surface.Water in water tank by water pump at Experimental mimic system internal circulation flow.
The flowing be similar in experimental simulation device of porous pavement rain flood runoff utilizes PIV to measure instantaneous two-dimentional velocity field after reaching and stablizing.PIV system is by laser light sheet 5, high speed camera 3, time schedule controller and computing machine.
Described laser light sheet 5 is arranged on directly over porous pavement, provides light source for giving the flow field near porous pavement; Described high speed camera 3 is arranged on the side of porous pavement, for taking the flow field situation on porous pavement; Described time schedule controller is used for the shooting of cooperation control lasing light emitter and high speed camera; The image of high speed camera shooting is sent to computing machine and carries out velocity field analysis.
The two two field picture of each experiment collection 100 groups, the time between two frames of one group of two two field picture is 500 μ s.The size of the particle that PIV uses is approximately 50 μm.
Figure 4 shows that the example (flow state: become a mandarin flow Q=6L/min, gradient S of two two field pictures that one group of PIV obtains
0=0.0105).
Porous pavement analogue means is arranged on (distance tank upstream extremity 100cm place) in the middle part of tank, and its structure as shown in Figure 2.
Porous pavement model 4 is of a size of 201mm × 30mm × 9mm, be made up of magnetic stainless steel bead, be that the magnetic stainless steel ball of 3mm forms (porosity 47.64%) by cubic close stacked arrangement by 2010 diameters, the pervious bed 4-2 be made up of man-made fiber under porous pavement 4-1, its lower plastic plate 4-6 for 4-3 with holes.Supported by pillar 4-4 at model bottom, and the current (Q that porous pavement infiltrates by a drainpipe is set in downstream end
1) discharge tank.Plastic plate in tank outside removing porous pavement model is covered with one deck magnetic ball, makes upstream and downstream tank and porous pavement be in sustained height.
The measurement of runoff rate
The electronic balance of the connection computer that sink outlet is placed can record the change of water tank quality continuously, so just can control total flow (Q) and the porous pavement seepage discharge (Q of runoff
1):
Q＝(m
Δt+1-m
Δt)×60/1000
(m in formula
Δ t+1-m
Δ t) be the change of water tank quality p.s..Because the precision of electronic balance is 0.01g, so the standard deviation of flow measurement is 0.0009L/min.The metering system of this flow can provide very high precision and can not cause the loss of flood peak.
Porous pavement rain flood runoff is similar to the test method of experiment simulator, as follows:
Step (1) gradient of motor adjustment porous pavement analogue means.
Step (2) is opened water pump and recirculated water is injected constant water header tank, utilize variable valve and electronic balance adjustment become a mandarin flow and infiltrate flow.
Step (3), after waterflow stabilization, utilizes PIV systematic survey velocity field.
Step (4) changes the gradient, become a mandarin the variable such as flow and infiltration flow, repeats step 1 ~ 3.
Example one:
This test have selected the four groups of gradient (S
0) test the impact of road gradient on rain flood runoff on porous pavement, be respectively: 0.0035,0.0105,0.0175 and 0.0244, the flow that becomes a mandarin (Q) is fixed as 6.00l/min, seepage discharge (Q
1) be 5% of the flow that becomes a mandarin.
Fig. 4 gives the porous pavement runoff velocity distribution curve of different gradient.Obviously, the larger gradient will cause flow velocity higher in fluid/porous pavement interface and turbulent flow region.Therefore, utilize mild slope and can effectively reduce storm runoff flow velocity during porous pavement design.The water depth ratio under different gradient can be obtained according to Fig. 4 equally, test the depth of water obtained and all reduce along with the increase of the gradient.
Example two:
This test have selected four groups of flows that become a mandarin (Q) and tests the impact of flow on rain flood runoff on porous pavement that become a mandarin, and is respectively: 3.20L/min, 4.50L/min, 6.00L/min, and 6.80L/min, the gradient is fixed as 0.0105, seepage discharge (Q
1) be 5% of the flow that becomes a mandarin.
Fig. 5 gives the porous pavement runoff velocity distribution curve that difference becomes a mandarin flow, and test flow velocity all increases significantly along with the increase of the flow that becomes a mandarin; The variation tendency that the depth of water under the different flows that becomes a mandarin increases with the increase of the flow that becomes a mandarin can be obtained equally according to Fig. 5.
Claims (9)
1. a porous pavement rain flood runoff is similar to experiment simulator, it is characterized in that: comprise a tank, the support that one can regulate the porous pavement model gradient is provided with in the bottom of described tank, a porous pavement model is provided with in described tank, the back up pad extending to tank head and afterbody is provided with at the head of porous pavement model and afterbody, drainpipe is provided with in the bottom of back up pad, and the back up pad being positioned at tank entry position is provided with the device causing vortex and bubble for reducing streamflow regime change, described device is formed by suction pipe array; The head of tank be provided with one with the water tank I of its inner constant head is communicated with, be provided with a water tank II be communicated with its inside at the afterbody of tank, the water in water tank I, II by water pump at Experimental mimic system internal circulation flow; A set of particle velocimetry for measuring velocity field is provided with above porous pavement model.
2. porous pavement rain flood runoff as claimed in claim 1 is similar to experiment simulator, it is characterized in that: described particle velocimetry, comprises laser light sheet, high speed camera, time schedule controller and computing machine;
Described laser light sheet is arranged on directly over porous pavement, provides light source for giving the flow field near porous pavement;
Described high speed camera is arranged on the side of porous pavement, for taking the flow field situation on porous pavement;
Described time schedule controller is used for the shooting of cooperation control lasing light emitter and high speed camera;
Described computing machine, carries out velocity field analysis for the image taken high speed camera.
3. porous pavement rain flood runoff as claimed in claim 1 is similar to experiment simulator, it is characterized in that: the pipeline be communicated with between the head of described tank and the water tank I of constant head is provided with variable valve.
4. porous pavement rain flood runoff as claimed in claim 1 is similar to experiment simulator, it is characterized in that: the bottom of described water tank II is provided with an electronic balance.
5. porous pavement rain flood runoff as claimed in claim 1 is similar to experiment simulator, it is characterized in that: described porous pavement model, comprise the porous pavement be made up of by cubic close stacked arrangement magnetic stainless steel ball, the pervious bed be made up of man-made fiber under described porous pavement is back up pad with holes below pervious bed.
6. porous pavement rain flood runoff as claimed in claim 4 is similar to experiment simulator, it is characterized in that: at described porous pavement model bottom by shore supports, and the current that porous pavement infiltrates by a drainpipe are set in the downstream end of porous pavement model discharge tank.
7. porous pavement rain flood runoff as claimed in claim 1 is similar to experiment simulator, it is characterized in that: described porous pavement moulded dimension is 201mm × 30mm × 9mm; The magnetic stainless steel ball being 3mm by 2010 diameters forms by cubic close stacked arrangement, its porosity 47.64%.
8. porous pavement rain flood runoff as claimed in claim 1 is similar to experiment simulator, it is characterized in that: in the back up pad at the forward and backward two ends of porous pavement model, be covered with one deck magnetic ball, makes upstream and downstream tank and porous pavement be in sustained height.
9. porous pavement rain flood runoff as claimed in claim 1 is similar to experiment simulator, it is characterized in that: described straw diameter is 5mm, long 10cm.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198353A (en) * | 2014-09-17 | 2014-12-10 | 山东大学 | Device and method for simulating permeable pavement stormwater runoff approximate test |
| CN108106981A (en) * | 2017-12-18 | 2018-06-01 | 大连理工大学 | A kind of method of liquid flow measurement in saturated porous media |
| CN108645772A (en) * | 2018-03-30 | 2018-10-12 | 重庆大学 | A kind of rainfall infiltration experimental system for simulating considering slope runoff |
| CN112326485A (en) * | 2020-09-29 | 2021-02-05 | 华北水利水电大学 | System and method for testing erosion resistance of downstream slope of check dam |
| CN112730095A (en) * | 2020-12-30 | 2021-04-30 | 长安大学 | Multi-factor coupling simulation test device and method for service performance of permeable pavement |
-
2014
- 2014-09-17 CN CN201420535082.5U patent/CN204116185U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198353A (en) * | 2014-09-17 | 2014-12-10 | 山东大学 | Device and method for simulating permeable pavement stormwater runoff approximate test |
| CN108106981A (en) * | 2017-12-18 | 2018-06-01 | 大连理工大学 | A kind of method of liquid flow measurement in saturated porous media |
| CN108645772A (en) * | 2018-03-30 | 2018-10-12 | 重庆大学 | A kind of rainfall infiltration experimental system for simulating considering slope runoff |
| CN108645772B (en) * | 2018-03-30 | 2021-05-25 | 重庆大学 | Rainfall infiltration simulation experiment system considering slope runoff |
| CN112326485A (en) * | 2020-09-29 | 2021-02-05 | 华北水利水电大学 | System and method for testing erosion resistance of downstream slope of check dam |
| CN112326485B (en) * | 2020-09-29 | 2024-01-12 | 华北水利水电大学 | System and method for testing scouring resistance of downstream slope of silt dam |
| CN112730095A (en) * | 2020-12-30 | 2021-04-30 | 长安大学 | Multi-factor coupling simulation test device and method for service performance of permeable pavement |
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Legal Events
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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: 20150121 Termination date: 20150917 |
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| EXPY | Termination of patent right or utility model |