CN204944967U - The directed washout test instrument of structure between cement concrete pavement layer - Google Patents
The directed washout test instrument of structure between cement concrete pavement layer Download PDFInfo
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- CN204944967U CN204944967U CN201520618491.6U CN201520618491U CN204944967U CN 204944967 U CN204944967 U CN 204944967U CN 201520618491 U CN201520618491 U CN 201520618491U CN 204944967 U CN204944967 U CN 204944967U
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Abstract
The utility model provides the directed washout test instrument of structure between cement concrete pavement layer, the directed washout test instrument of structure between cement concrete pavement layer, interlayer structure directed washout test instrument in described road surface comprises scour trough, drive system and control system three part, control system control-driven system produces Wash flow, and the passage orientation reserved in scour trough of Wash flow washes away structural test piece between the supercrust that is placed in advance in scour trough; Scour trough is connected by the X-over with current meter with drive system; Control system connects drive system and X-over.The utility model relates to the directed washout test instrument of structure between a kind of cement concrete pavement layer, by scour trough, drive system and control system three part form, the accurate control-driven system of control system produces Wash flow, and the passage orientation that Wash flow is reserved in scour trough washes away the road surface interlayer structure be placed in advance in scour trough.
Description
Technical field
The utility model belongs to field of road, relates to structure washout test instrument between a kind of cement concrete pavement layer, is specifically related to a kind of for simulating the directed test instrument washed away between cement concrete pavement surface and basic unit.
Background technology
In road engineering, pavement structure is generally divided into surface layer, basic unit and bed course.Compact siro spinning technology between surface layer and basic unit, for driving provides stable support.But during rainfall, if impeded drainage, rainwater oozes under seam or crack, microfissure between surface layer and basic unit gathers, under the effect of driving, the moisture in crack can by continuous " extrude-suck-extruding ", and between road pavement structural sheet, especially the generation of sub-surface surface is washed away, come to nothing under causing cement concrete slab gradually, the problems such as pavement cracking, disconnected plate.
The process " extrude-suck-extruded " due to Wash flow all the time from crack in layer to transverse joint again to crack in layer, therefore wash away direction and fix, and all carry out along substrate surface.
At present, the testing equipment evaluating cement concrete pavement erosion resistibility mainly contains rotating brush, shaking table, and rotating brush adopts rotatable wire brush road pavement structural test piece surface to carry out dry grinding and brushes, can not the effect of effective Simulated Water; Shaking table effectively can not be held souring power and wash away number of times, and wash surface is not fixed, and test error is larger.In addition, 201410834673.7 also disclose a kind of circulating washout test instrument Deng test instrument, but it washes away object is bottom cement concrete slab, but not the main object substrate top surface that interlayer washes away, moreover its current major part provided not is parallel to surface of test piece, can not the effective scour process " extrude-suck-extruded " along surface of test piece of simulated flow.
In a word, above-mentioned test unit is all evaluate the erosion resistibility of ground surface material itself, cannot simulate this ground surface material and be in erosion resistibility in actual working environment, namely effectively can not simulate the actual working state of this pavement structure material.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of for the measurement mechanism that washes away of Simulated Water cement concrete pavement structure interlayer orientation, and what can measure structure between cement concrete pavement layer accurately, easily washes away situation.It solve the problems referred to above.
The technical scheme that the utility model adopts is as follows:
The directed washout test instrument of structure between cement concrete pavement layer, interlayer structure directed washout test instrument in described road surface comprises scour trough, drive system and control system three part, control system control-driven system produces Wash flow, and the passage orientation reserved in scour trough of Wash flow washes away structural test piece between the supercrust that is placed in advance in scour trough; Scour trough is connected by the X-over with current meter with drive system; Control system connects drive system and X-over.
Scour trough is made up of cell body bottom, cell body top and rubber blanket, and cell body bottom is provided with test specimen chamber, flush chamber and the bolt for being connected cell body top, and test specimen chamber is for installing basic unit to be measured test specimen, and flush chamber has opening to connect with external water stream.
Cell body top is provided with test specimen chamber, the duct can passed for the bolt of corner, cell body bottom and buffered chimney filter, test specimen chamber is for installing surface layer test specimen to be measured, after surface layer test specimen is installed, the available latch that screws is fixed, and buffered chimney filter is clear hard pipe, is in communication with the outside, buffered chimney filter top is provided with the first valve, be carved with lower water level and upper water level two scale marks below first valve, upper waterline is concordant with the first valve, and lower waterline is positioned at the first bend place of the S bend pipe of buffered chimney filter.
Drive system is made up of motor, T-shaped leading screw and piston body.
Test specimen chamber can be right cylinder or cube.
The area of plane of flush chamber can be equal to or greater than test specimen cavity area, general identical with test specimen chamber, high 1 ~ 2cm.
The cell body top of scour trough is provided with buffered chimney filter, and buffered chimney filter generally should be S type, diameter 16 ~ 22mm.
Compared with prior art, the utility model has the advantage of:
The utility model relates to the directed washout test instrument of structure between a kind of cement concrete pavement layer, by scour trough, drive system and control system three part form, the accurate control-driven system of control system produces Wash flow, and the passage orientation that Wash flow is reserved in scour trough washes away the road surface interlayer structure be placed in advance in scour trough.
The utility model provides the scour trough washed away between simulated roadway structural sheet, the scour trough real simulation interlayer of cement concrete pavement (surface layer and basic unit) structure, and the directed access " extrude-suck-extruded " for current is provided at interlayer, Wash flow can arrive left side again on the left of substrate surface orientation to right side is washed away.Meanwhile, the salable test specimen side of scour trough and bottom surface, and then ensure that the wash surface of test specimen is known and constant.
The utility model additionally provides accuracy-control system, can regulate drive system in real time according to the signal of current meter feedback, in time the speed of adjustment Wash flow and frequency, and then realizes acceleration and wash away.
In addition, because the utility model provides closed experimental enviroment, in scour process, the particle washed away can be blended in Wash flow, and the interlayer simulating actual pavement structure more really washes away.After washing away end, by parts such as washing and filtering scour troughs, get final product the particle that complete collection washes away, in order to the interlayer erosion resistibility of exact evaluation pavement structure.
Accompanying drawing explanation
Fig. 1 is the using state reference diagram of the directed washout test instrument of structure between the utility model cement concrete pavement layer.
Wherein: 1-scour trough; 2-drive system; 3-control system; 4-X-over; 11-cell body bottom; 12-cell body top; 13-rubber blanket; 14-bolt; 21-motor; 22-T type leading screw; 23-piston body; 24-valve; 111-basic unit test specimen chamber; 112-flush chamber; 121-test specimen chamber; 122-duct; The buffered chimney filter of 123-; 124-first valve; 125-screws latch; Waterline under 126-.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
See Fig. 1, the utility model provides the directed washout test instrument of structure between a kind of cement concrete pavement layer, it is characterized in that: interlayer structure directed washout test instrument in described road surface comprises scour trough 1, drive system 2 and control system 3 three part, control system 3 accurately control-driven system 2 produces Wash flow, and the passage reserved through scour trough 1 in of Wash flow is directed washes away structural test piece between the supercrust that is placed in advance in scour trough 1.
Scour trough 1 connects by being connected 4 with the X-over of current meter with drive system 2; Control system 3 connects drive system 2 and X-over 4, can regulate drive system 2 in real time, adjust speed and the frequency of Wash flow in time according to the signal of current meter feedback in X-over 4.Scour trough 1 is made up of cell body bottom 11, cell body top 12 and rubber blanket 13, cell body bottom 11 is provided with test specimen chamber 111, flush chamber 112 and the bolt 14 for being connected cell body top 12, test specimen chamber 111 is for installing basic unit to be measured test specimen, and flush chamber 112 has opening to connect with external water stream.Cell body top 12 is provided with test specimen chamber 121, the duct 122 can passed for the bolt 14 of 11 4 jiaos, cell body bottom and buffered chimney filter 123, test specimen chamber 121 is for installing surface layer test specimen to be measured, after installation, the available latch 125 that screws is fixed, buffered chimney filter 123 is in communication with the outside, and buffered chimney filter top is provided with the first valve 124.Drive system 2 is made up of motor 21, T-shaped leading screw 22 and piston body 23, piston body 23 bottom water-filling, the rotational transform that motor 21 can provide by T-shaped leading screw 22 is for pumping, and then the water ordered about in piston body 23 realizes " discharging-suck-discharge " reciprocation cycle.
Use the test method of this test instrument as follows, to wash away structure between semi-rigid type base cement concrete pavement layer:
1. the cement stabilized macadam base test specimen of forming diameter 15cm height 5cm; The Portland Cement Concrete Surface Course test specimen of forming diameter 15cm height 5cm, surface layer test specimen reserves apart from 6cm position, the center of circle right cylinder passage that diameter is 20mm;
2. after surface layer and basic unit's test specimen health complete, soak 48 hours in water, weigh surface drying quality, be designated as m face, m base respectively, m face=2.121kg, m base=2.110kg;
3. surface layer and basic unit's test specimen are respectively charged in the test specimen chamber of cell body top 12 and cell body bottom 11, the position of adjustment surface layer test specimen, access the buffered chimney filter 123 of transparent hard, make the bottom of buffered chimney filter 123 concordant with surface layer lower surface, use screws latch 121 and is fixed by surface layer test specimen; Use epoxy resin adhesive by test specimen periphery and test specimen chamber contact portion, buffered chimney filter 123 and surface layer channel seal;
4. install the rubber blanket 13 that thickness is 5mm, use bolt 14 by cell body bottom 11 and cell body top 12 compact siro spinning technology, for preventing seeping water between top and the bottom, periphery epoxy resin adhesive seals;
5. scour trough 1, X-over 4 and drive system 2 is connected, the tachograph of connection control system 3, X-over 4 and motor 21;
6. Open valve 24 and the first valve 124, examination is washed away, and regulates Wash flow by control system 3, and when making piston body 23 discharge water, the water surface elevation in buffered chimney filter arrives lower waterline 126;
7. regulate and wash away frequency to 1 circulation per second;
8. start washout test, after 10000 circulations, close drive system 2, terminate to wash away;
9. rinse scour trough 1, X-over 4 and piston body 23, collect and wash away particle, weigh surface drying quality m2, m2=0.177kg;
Calculated mass loss percentage t, t=m2/ (m face+m base)=0.177/ (2.121+2.022)=4.3%.
Above-mentioned embodiment is a preferred embodiment of the present utility model; be not for limiting enforcement of the present utility model and right; all equivalences made according to the content described in the utility model patent protection scope change and modify, and all should be included in the utility model patent claim.
Claims (7)
1. the directed washout test instrument of structure between cement concrete pavement layer, it is characterized in that: interlayer structure directed washout test instrument in described road surface comprises scour trough (1), drive system (2) and control system (3) three part, control system (3) control-driven system (2) produces Wash flow, and the passage orientation that Wash flow is reserved through scour trough (1) in washes away structural test piece between the supercrust that is placed in advance in scour trough (1); Scour trough (1) is connected by the X-over (4) with current meter with drive system (2); Control system (3) connects drive system (2) and X-over (4).
2. the directed washout test instrument of structure between cement concrete pavement layer according to claim 1, it is characterized in that: scour trough (1) is made up of cell body bottom (11), cell body top (12) and rubber blanket (13), cell body bottom (11) is provided with test specimen chamber (111), flush chamber (112) and the bolt (14) for being connected cell body top (12), test specimen chamber (111) is for installing basic unit to be measured test specimen, and flush chamber (112) has opening to connect with external water stream.
3. the directed washout test instrument of structure between cement concrete pavement layer according to claim 2, it is characterized in that: cell body top (12) are provided with test specimen chamber (121), the duct (122) can passed for the bolt (14) of cell body bottom (11) corner and buffered chimney filter (123), test specimen chamber (121) is for installing surface layer test specimen to be measured, after installation, the available latch (125) that screws is fixed, buffered chimney filter (123) is clear hard pipe, be in communication with the outside, buffered chimney filter (123) top is provided with the first valve (124), first valve (124) is carved with lower water level (126) and upper water level two scale marks below, upper waterline is concordant with the first valve (124), lower waterline (126) is positioned at the first bend place of the S bend pipe of buffered chimney filter (123).
4. the directed washout test instrument of structure between cement concrete pavement layer according to claim 1, is characterized in that: drive system (2) is made up of motor (21), T-shaped leading screw (22) and piston body (23).
5. the directed washout test instrument of structure between cement concrete pavement layer according to claim 2, is characterized in that: test specimen chamber (111) can be right cylinder or cube.
6. the directed washout test instrument of structure between cement concrete pavement layer according to claim 2, is characterized in that: the area of plane of flush chamber (112) can be equal to or greater than test specimen cavity area, general identical with test specimen chamber, high 1 ~ 2cm.
7. the directed washout test instrument of structure between cement concrete pavement layer according to claim 1 and 2, it is characterized in that: the cell body top of scour trough (1) is provided with buffered chimney filter, buffered chimney filter generally should be S type, diameter 16 ~ 22mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520618491.6U CN204944967U (en) | 2015-08-17 | 2015-08-17 | The directed washout test instrument of structure between cement concrete pavement layer |
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| CN201520618491.6U CN204944967U (en) | 2015-08-17 | 2015-08-17 | The directed washout test instrument of structure between cement concrete pavement layer |
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| CN204944967U true CN204944967U (en) | 2016-01-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092402A (en) * | 2015-08-17 | 2015-11-25 | 山西省交通科学研究院 | Orientated washout test instrument for cement concrete pavement interlayer structure and use method of orientated washout test instrument |
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2015
- 2015-08-17 CN CN201520618491.6U patent/CN204944967U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092402A (en) * | 2015-08-17 | 2015-11-25 | 山西省交通科学研究院 | Orientated washout test instrument for cement concrete pavement interlayer structure and use method of orientated washout test instrument |
| CN105092402B (en) * | 2015-08-17 | 2018-03-02 | 山西省交通科学研究院 | A kind of method of structure orientation washout test between cement concrete pavement layer |
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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: 20160106 Termination date: 20190817 |
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| CF01 | Termination of patent right due to non-payment of annual fee |