CN207751816U - A kind of dynamic water washout test device of semi-rigid sub-base material - Google Patents
A kind of dynamic water washout test device of semi-rigid sub-base material Download PDFInfo
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- CN207751816U CN207751816U CN201820201057.1U CN201820201057U CN207751816U CN 207751816 U CN207751816 U CN 207751816U CN 201820201057 U CN201820201057 U CN 201820201057U CN 207751816 U CN207751816 U CN 207751816U
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Abstract
The utility model belongs to pavement engineering technical field of test equipment, and specifically a kind of semi-rigid sub-base material moves water washout test device, and experimental rig includes pedestal, wash away cylinder, scouring head, driving motor and transmission device；It washes away cylinder and driving motor is fixedly mounted on pedestal, the side for washing away cylinder is equipped with sponge, and the top for washing away cylinder is equipped with head cover, and head cover is equipped with gas vent；Transmission device includes eccentric wheel, first connecting rod, second connecting rod, third connecting rod and column；Scouring head, which is located at, to be washed away in cylinder, multiple intercommunicating pores is evenly equipped on scouring head, the axial direction of intercommunicating pore is in vertical direction.Compared with the existing technology, the utility model can more accurate, comprehensive simulating semi-rigid base the case where being washed away by dynamic water, improve test accuracy.
Description
Technical field
The utility model belongs to pavement engineering technical field of test equipment, and specifically a kind of semi-rigid sub-base material moves water punching
Brush experimental rig.
Background technology
China's weather is based on the torrid zone, subtropical monsoon climate, and precipitation is sufficient, so China's road Moisture Damage phenomenon is general
Time, road Moisture Damage is mainly manifested in, and road surface has certain hole and crack, and the moisture generated in natural environment can be by splitting
Seam penetrates into inside road, and vehicle travels when on the road for have water, and meeting road pavement generates normal pressure and negative pressure, makes in road surface
Portion generates flowing pressure, causes road surface impaired, seriously affects the performance of road.Dynamic water washout test is dynamic for simulated roadway
Water pressure passes through the scour resistance of evaluation of test result pavement material.It is mixed that CN104483257B discloses a kind of road cement
The solidifying dynamic water washout test instrument of soil, including wash away cylinder, test specimen hoop, piston and be located at the dynamic water circulation channel for washing away a side, it tries
When testing, washing away for simulated flow is moved back and forth up and down by piston, water is washing away two in cylinder by dynamic water circulation channel
Chamber body-internal-circulation.The tester is not particularly suited for base for doing water washout test to the road cement concrete.Base
Positioned at face layer hereinafter, face layer directly and tire interface, and base is not directly and tire interface, the flowing pressure suffered by base
Come from internal dynamic caused by the interlayer flowing pressure of the gap infiltration generation of face layer and the gap of base's self-growth formation
Water pressure, interlayer flowing pressure are mainly vertical direction, and extend with the development in crack equally can be right for internal flowing pressure
Crack laterally generates lateral pressure, if using above-mentioned tester, has the following disadvantages：（1）Water is moved from the side for washing away cylinder
It is into and out, lateral scouring force is mainly generated to the upper surface of test specimen, and interlayer flowing pressure is mainly vertical direction
Pressure, therefore above-mentioned tester can not simulate the case where base is by interlayer flowing pressure, and error is caused to test result；（2）
The case where flowing pressure generates lateral pressure inside base can not be simulated.
Invention content
Purpose of the utility model is to solve above-mentioned the deficiencies in the prior art, and it is dynamic to provide a kind of semi-rigid sub-base material
Water washout test device, can more accurate, comprehensive simulating semi-rigid base the case where being washed away by dynamic water, improve experiment essence
Degree.
Technical problem to be solved in the utility model is realized using following technical scheme：A kind of semi-rigid sub-base material
Dynamic water washout test device, including pedestal, wash away cylinder, scouring head, driving motor and transmission device；It is described to wash away cylinder and driving electricity
Machine is fixedly mounted on pedestal, and the side for washing away cylinder is equipped with sponge, and the top for washing away cylinder is equipped with head cover, is set on the head cover
There is gas vent；The transmission device includes eccentric wheel, first connecting rod, second connecting rod, third connecting rod and column, and the column is fixed
On pedestal, the second connecting rod is articulated on column, and the driving motor is connect with eccentric wheel, the first connecting rod respectively with
Eccentric wheel and second connecting rod are hinged, and the rotation of eccentric wheel can drive second connecting rod reciprocally swinging, the third by first connecting rod
One end of connecting rod is hinged with second connecting rod, and the other end of third connecting rod is connect by spring with scouring head；The scouring head is located at
It washes away in cylinder, multiple intercommunicating pores is evenly equipped on scouring head, the axial direction of the intercommunicating pore is in vertical direction.
The technical solution of the utility model also has：The intercommunicating pore is bellmouth of the major diameter under.In Driving Loading
Under, road surface produces crack, is continued to develop with the increase crack of number of loading, according to mechanics principle, the crack roads Hui
Face face layer expands at base's interface, so that crack end formation " inverted funnel " shape of face layer and base intersection, from
And to generate " emptying " phenomenon in use afterwards, and when layer is by negative pressure after wheel face to face, due to above-mentioned
The presence of phenomenon makes face layer act on enhancing to the vacuum suction of base, has seriously affected the performance of base.In order to more
True simulation base stressing conditions, using the technical program.When scouring head moves upwards, this design can not only make
Vacuum area increases below scouring head, also due to aperture becomes smaller so that moisture film is formed above scouring head, to which enhancing exists above
Suction intensity during experiment drives the water washed away in cylinder to move upwards.And this design energy when scouring head moves downward
Enough increase thrust, ensures that water can be flowed out from scouring head during the experiment, provide a buffer area for flow, reduce water
Stream is precipitated from scouring head side, increases the accuracy of test simulation.
The technical solution of the utility model also has：The bottom for washing away cylinder is equipped with rubber ring and is prevented for blocking test specimen
Test specimen moves at the trial.
The technical solution of the utility model also has：The bottom for washing away cylinder is equipped with drain valve.
The technical solution of the utility model also has：The head cover, which is detachably arranged in, to be washed away on cylinder, head cover and washes away cylinder
Between be equipped with sealing ring.
The technical solution of the utility model also has：The material of the scouring head is rubber, plays cushioning effect, anti-locking apparatus
It is impaired.
The technical solution of the utility model also has：The material for washing away cylinder is steel.
Compared with the existing technology, the utility model semi-rigid sub-base material moves having the beneficial effect that for water washout test device：
（1）The axial direction of intercommunicating pore be in vertical direction, therefore test in test specimen upper surface only by vertical direction positive pressure or negative pressure, to examination
The upper surface of part mainly generates vertical scouring force, can more accurately simulate the case where base is by interlayer flowing pressure, and
And the case where flowing pressure is vertical direction inside base can also be simulated, improve test accuracy；（2）Hole on sponge being capable of mould
Quasi- base internal void, dynamic water can be generated inside base due to crack by the side of sponge seepage flow to test specimen with simulating
The case where flowing pressure is lateral pressure improves test accuracy；（3）Third connecting rod is connect by spring with scouring head, is played slow
Punching acts on, and anti-locking apparatus is impaired；（4）Whole device is integrated on pedestal, easy to remove.
The utility model additionally provides a kind of method that semi-rigid sub-base material moves water washout test, includes the following steps：
A, by after the test specimen constant temperature immersion for 24 hours by maintenance, surface of test piece moisture is wiped, weighing obtains before test specimen is washed
Quality m1；
B, the inside of cylinder is washed away with water identical with test water temperature moistening；
C, test specimen is put into and is washed away in cylinder；
D, water is poured into inside cylinder to washing away, height of water level is the 2/3 of height of specimen, then connects scouring head and third connecting rod
It connects, head cover is fixed on to the top for washing away cylinder；
E, start driving motor, scouring head vertically moves back and forth under the driving of driving motor, under scouring head
Positive pressure and negative pressure are alternately produced in the cavity of side, water washes away the upper surface of test specimen under the action of positive pressure and negative pressure and passes through sponge
Wash away the side of test specimen；
F, after washing away, surface of test piece moisture is wiped, weighing obtains the quality m after test specimen is washed2；
G, be calculated test specimen be washed it is forward and backward of poor quality= m1-m2, withAs measurement semi-rigid type base material
Expect the index of scour resistance,It is bigger, illustrate that the scour resistance of the semi-rigid sub-base material is poorer.
Preferably, the height of the test specimen is 150mm, a diameter of 150mm.
Preferably, the temperature of the test water is 5 DEG C ~ 25 DEG C.
Compared with the existing technology, the utility model semi-rigid sub-base material moves having the beneficial effect that for water scouring test methods：
（1）Water-saturated state is in after washing away inside test specimen, constant temperature, which impregnates 24H, before washing away makes test specimen internal interstices be in full watery
State, therefore test error can be reduced, improve experiment accuracy；（2）The meeting of different temperature makes to generate different answer in test specimen
Power, and then lead to different test results, the inside of cylinder, drop are washed away with water identical with test water temperature moistening before washing away
Influence of the low ambient temperature to test result improves experiment accuracy.
Description of the drawings
Fig. 1 is the front view that the utility model semi-rigid sub-base material moves water washout test device.
Fig. 2 is the vertical view that the utility model semi-rigid sub-base material moves water washout test device.
In figure：1, pedestal, 2, wash away cylinder, 3, scouring head, 4, driving motor, 5, sponge, 6, head cover, 7, gas vent, 8, partially
Heart wheel, 9, first connecting rod, 10, second connecting rod, 11, third connecting rod, 12, column, 13, spring, 14, intercommunicating pore, 15, rubber ring,
16, drain valve, 17, test specimen.
Specific implementation mode
In order to clarify the technical characteristics of the invention, below according to attached drawing to specific embodiment of the present invention make into
One step explanation.
As shown in Figure 1 and Figure 2, a kind of semi-rigid sub-base material moves water washout test device, including pedestal 1, washes away cylinder 2, punching
Brush head 3, driving motor 4 and transmission device.
The material for washing away cylinder 2 is steel.Cylinder 2 is washed away to be bolted on pedestal 1.The internal diameter for washing away cylinder 2 is 170
Millimeter.The side for washing away cylinder 2 is equipped with sponge 5, and the bottom for washing away cylinder 2 is equipped with rubber ring 15.The top for washing away cylinder 2 is equipped with head cover 6,
Head cover 6, which is detachably arranged in, to be washed away on cylinder 2, head cover 6 and is washed away and is equipped with sealing ring between cylinder 2.Head cover 6 is equipped with gas vent 7.
The bottom for washing away cylinder 2 is equipped with drain valve 16.
Transmission device includes eccentric wheel 8, first connecting rod 9, second connecting rod 10, third connecting rod 11 and column 12.Column 12 is solid
It is scheduled on pedestal 1, second connecting rod 10 is articulated on column 12.Driving motor 4 is fixedly mounted on pedestal 1, driving motor 4 with partially
Heart wheel 8 connects, and first connecting rod 9 is hinged with eccentric wheel 8 and second connecting rod 10 respectively, eccentric wheel 8, first connecting rod 9, second connecting rod 10
Crank and rocker mechanism is constituted with column 12, the rotation of eccentric wheel 8 can drive 10 reciprocally swinging of second connecting rod by first connecting rod 9.
One end of third connecting rod 11 is hinged with second connecting rod 10, and the other end of third connecting rod 11 is connect by spring 13 with scouring head 3, bullet
Spring 13 plays in test cushioning effect, and anti-locking apparatus is impaired.The drive third connecting rod 11 of second connecting rod 10 moves up and down and a left side
The compound motion of right swing, therefore it is equipped with hole at the center of head cover 6, prevent head cover 6 from interfering with third connecting rod 11.
The material of scouring head 3 is rubber, and cushioning effect is played in experiment, and anti-locking apparatus is impaired.Scouring head 3, which is located at, washes away cylinder
In 2, multiple intercommunicating pores 14 are evenly equipped on scouring head 3, intercommunicating pore 4 is bellmouth of the major diameter under, and the axial direction of intercommunicating pore 14 is in perpendicular
Histogram to.
It is a kind of to be washed away using the dynamic dynamic water of water washout test device progress semi-rigid sub-base material of above-mentioned semi-rigid sub-base material
The method of experiment, includes the following steps：
A, by after 17 constant temperature of the test specimen immersion for 24 hours by maintenance, 17 surface moisture of test specimen is wiped, weighing obtains 17 quilt of test specimen
Quality m before washing away1；
B, the inside that cylinder 2 is washed away with 10 DEG C of water moistenings, to reduce influence of the environment temperature to test result；
C, test specimen 17 is put into and is washed away in cylinder 2, the height of test specimen 17 is 150mm, a diameter of 150mm, and test specimen 17 is caught in punching
Fixed in the rubber ring 15 of 2 lower end of brush pot, test specimen 17 shakes or shifts and generate and collide with during preventing experiment；
D, water is poured into washing away inside cylinder 2, height of water level is the 2/3 of 17 height of test specimen, then connects scouring head 3 and third
Bar 11 connects, and head cover 6 is fixed on to the top for washing away cylinder 2；
E, start driving motor 4, scouring head 3 vertically moves back and forth under the driving of driving motor 4, in scouring head
It is alternately produced positive pressure and negative pressure in the cavity of 3 lower sections, specifically, when scouring head 3 moves down, since intercommunicating pore 14 is damping hole,
The cavity of 3 lower section of scouring head will produce positive pressure, and similarly, when scouring head 3 moves up, the cavity of 3 lower section of scouring head will produce negative pressure,
Water washes away the upper surface of test specimen 17 under the action of positive pressure and negative pressure and washes away the side of test specimen 17 across sponge 5；
F, after washing away, 17 surface moisture of test specimen is wiped, weighing obtains the quality m2 after test specimen 17 is washed；
G, be calculated test specimen 17 be washed it is forward and backward of poor quality=m1-m2, withAs the semi-rigid base of measurement
The index of layer material scour resistance,It is bigger, illustrate that the scour resistance of the semi-rigid sub-base material is poorer.
The embodiments of the present invention are elaborated above in conjunction with attached drawing, but the utility model is not limited to
Embodiment is stated, within the knowledge of a person skilled in the art, the utility model aims can also not departed from
Under the premise of make a variety of changes.
Claims (7)
1. a kind of semi-rigid sub-base material moves water washout test device, including pedestal（1）, wash away cylinder（2）, scouring head（3）, driving
Motor（4）And transmission device, it is characterised in that：It is described to wash away cylinder（2）And driving motor（4）It is fixedly mounted on pedestal（1）On, institute
It states and washes away cylinder（2）Side be equipped with sponge（5）, wash away cylinder（2）Top be equipped with head cover（6）, the head cover（6）It is equipped with exhaust
Hole（7）；The transmission device includes eccentric wheel（8）, first connecting rod（9）, second connecting rod（10）, third connecting rod（11）And column
（12）, the column（12）It is fixed on pedestal（1）On, the second connecting rod（10）It is articulated with column（12）On, the driving electricity
Machine（4）With eccentric wheel（8）Connection, the first connecting rod（9）Respectively with eccentric wheel（8）And second connecting rod（10）It is hinged, eccentric wheel
（8）Rotation can pass through first connecting rod（9）Drive second connecting rod（10）Reciprocally swinging, the third connecting rod（11）One end and the
Two connecting rods（10）It is hinged, third connecting rod（11）The other end pass through spring（13）With scouring head（3）Connection；The scouring head（3）
Positioned at washing away cylinder（2）In, scouring head（3）On be evenly equipped with multiple intercommunicating pores（14）, the intercommunicating pore（14）Axial direction in vertical side
To.
2. semi-rigid sub-base material according to claim 1 moves water washout test device, it is characterised in that：The intercommunicating pore
（14）For bellmouth of the major diameter under.
3. semi-rigid sub-base material according to claim 1 moves water washout test device, it is characterised in that：It is described to wash away cylinder
（2）Bottom be equipped with rubber ring（15）.
4. semi-rigid sub-base material according to claim 1 moves water washout test device, it is characterised in that：It is described to wash away cylinder
（2）Bottom be equipped with drain valve（16）.
5. moving water washout test device according to any semi-rigid sub-base material of claim 1 ~ 4, it is characterised in that：It is described
Head cover（6）It is detachably arranged in and washes away cylinder（2）On, head cover（6）With wash away cylinder（2）Between be equipped with sealing ring.
6. moving water washout test device according to any semi-rigid sub-base material of claim 1 ~ 4, it is characterised in that：It is described
Scouring head（3）Material be rubber.
7. moving water washout test device according to any semi-rigid sub-base material of claim 1 ~ 4, it is characterised in that：It is described
Wash away cylinder（2）Material be steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820201057.1U CN207751816U (en) | 2018-02-06 | 2018-02-06 | A kind of dynamic water washout test device of semi-rigid sub-base material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820201057.1U CN207751816U (en) | 2018-02-06 | 2018-02-06 | A kind of dynamic water washout test device of semi-rigid sub-base material |
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| CN207751816U true CN207751816U (en) | 2018-08-21 |
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| CN201820201057.1U Active CN207751816U (en) | 2018-02-06 | 2018-02-06 | A kind of dynamic water washout test device of semi-rigid sub-base material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225961A (en) * | 2018-02-06 | 2018-06-29 | 山东省交通科学研究院 | A kind of semi-rigid sub-base material moves water washout test device and test method |
| CN113029797A (en) * | 2021-03-15 | 2021-06-25 | 河海大学 | Rock hydraulic coupling creep test equipment |
| CN113277173A (en) * | 2021-06-01 | 2021-08-20 | 周生宝 | Traditional chinese medicine powder encapsulation equipment |
-
2018
- 2018-02-06 CN CN201820201057.1U patent/CN207751816U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225961A (en) * | 2018-02-06 | 2018-06-29 | 山东省交通科学研究院 | A kind of semi-rigid sub-base material moves water washout test device and test method |
| CN108225961B (en) * | 2018-02-06 | 2023-11-07 | 山东省交通科学研究院 | Semi-rigid base material dynamic water scouring test device and test method |
| CN113029797A (en) * | 2021-03-15 | 2021-06-25 | 河海大学 | Rock hydraulic coupling creep test equipment |
| CN113277173A (en) * | 2021-06-01 | 2021-08-20 | 周生宝 | Traditional chinese medicine powder encapsulation equipment |
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