CN207396289U - A kind of bituminous concrete has pressure flexible wall infiltration experiment device - Google Patents
A kind of bituminous concrete has pressure flexible wall infiltration experiment device Download PDFInfo
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- CN207396289U CN207396289U CN201721569641.4U CN201721569641U CN207396289U CN 207396289 U CN207396289 U CN 207396289U CN 201721569641 U CN201721569641 U CN 201721569641U CN 207396289 U CN207396289 U CN 207396289U
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- cap
- pedestal
- bituminous concrete
- outer sleeve
- cushion block
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Abstract
The utility model discloses a kind of bituminous concretes pressure flexible wall infiltration experiment device, including pedestal, be uniformly arranged the first screw rod at susceptor edges, outer sleeve be set on pedestal；Rubber membrane is provided on the inside of outer sleeve；Lower cushion block is provided on pedestal, lower cushion block peripheral-edge lower is provided with the first rubber seal；Lower cushion block has been sequentially arranged above cap on first, cap on second, is provided with the second rubber seal on second below cap outer rim, and pedestal, lower cushion block are both provided with water passage through cylinder on first in the middle part of cap on cap and second；Graduated cylinder is connected with above the water passage of cap on first, graduated cylinder lower part is provided with the first valve；Upper cover plate is provided with above outer sleeve；Snorkel is embedded on outer sleeve barrel, lead to rubber membrane for snorkel one end, and the other end is connected to barometric air accumulator and vacuum pump, and the air accumulator other end is connected with air compressor.The utility model can provide authentic data for correct evaluation bituminous concrete durability and water stability.
Description
Technical field
The utility model is related to RC axial loading column technical fields, have pressure flexibility more particularly to a kind of bituminous concrete
Wall infiltration experiment device.
Background technology
Current country's bituminous concrete infiltration coefficient test, no matter indoor asphalt coagulation local soil type is dripped into design or scene
Blue or green concrete road surface final acceptance of construction is all directly placed on bituminous concrete specimen surface with a kind of varying head, chassis and permeates system
Number tester.Such device is susceptible between chassis and specimen surface and seeps water, while in calculation permeability coefficient, exists without considering water
Bituminous concrete inner transverse seepage flow, and truth is water not only vertical seepage flow, but also horizontal seepage flow in bituminous concrete.
Therefore the osmotic coefficient ratio actual value is bigger than normal.Geotechnique's aspect also has device for testing permeability coefficient at present, but such test device makes
Sample is small, while cannot use prefabricated sample, it is thus impossible to be tested for the infiltration coefficient of bituminous concrete.
Such external device, can only carry out varying head infiltration coefficient sample, the confining pressure being applied to around rubber pattern only has
100Kpa or so.
Therefore those skilled in the art, which are directed to exploitation one kind, can overcome chassis infiltration and horizontal seepage flow, accurate testing
Bituminous concrete has pressure flexible wall infiltration experiment device.
Utility model content
In view of the drawbacks described above of the prior art, the technical problem to be solved by the utility model is to provide one kind can gram
Chassis infiltration and horizontal seepage flow are taken, the bituminous concrete of accurate testing has pressure flexible wall infiltration experiment device.
To achieve the above object, the utility model, which provides a kind of bituminous concrete, pressure flexible wall infiltration experiment device,
Including the pedestals being in the form of a column, several first screw rods are uniformly arranged at the susceptor edges, outer sleeve is provided on the pedestal,
The outer sleeve is stood on the inside of first screw rod；Rubber membrane is provided on the inside of the outer sleeve；In the rubber on the pedestal
Glued membrane is internally provided with columnar lower cushion block, and the lower cushion block peripheral-edge lower is provided with the first rubber seal；The lower cushion block
Top is provided with cap on columnar first, is provided with cap on columnar second on described first above cap, on described second outside cap
It is provided with the second rubber seal below edge, the pedestal, lower cushion block are both provided on first in the middle part of cap on cap and second and run through
The water passage of cylinder；Graduated cylinder is connected with above the water passage of cap on described first, the graduated cylinder lower part is provided with the first valve
Door；
Upper cover plate is provided with above the outer sleeve, described upper cover plate one end is fixed on first screw rod by nut
On, the other end is stretched into inside the outer sleeve, and adjusting screw rod is in contact through the upper cover plate with cap on described second；
Snorkel is embedded on the outer sleeve barrel, lead to the rubber membrane for described snorkel one end, other end difference
It is connected with barometric air accumulator and vacuum pump, the air accumulator other end is connected with air compressor；The snorkel and
The first air pressure regulator is provided between air accumulator, the second valve is provided between the snorkel and vacuum pump.
Preferably, being equipped with rubber pad on the pedestal, the outer sleeve is stood on the rubber pad.
Preferably, the lower cushion block peripheral-edge lower is provided with the first chamfering, to accommodate first rubber seal；It is described
The second chamfering is provided with below cap outer rim on second, to accommodate second rubber seal.
Preferably, the pedestal, lower cushion block, the water passage diameter on first in the middle part of cap are identical, on described first in cap
The diameter of portion's water passage is less than the diameter of water passage in the middle part of cap on described second.
Preferably, tapered above the lower cushion block, the angle of the conical surface and horizontal plane is 10 ° above the lower cushion block.
Preferably, in horn-like below cap on described first.
Preferably, it is provided with interface below the water passage of the pedestal.
Preferably, it is provided with bearing below the pedestal.
Preferably, the quantity of first screw rod is 3.
Preferably, being provided with water tank above the graduated cylinder, gap is provided on the graduated cylinder side wall, the gap leads to
It crosses check valve and is connected with closed tank, the closed tank is connected by the second air pressure regulator and the snorkel and air accumulator
It is logical.
The beneficial effects of the utility model are：The utility model can accurately test bituminous concrete infiltration coefficient, can be objective
Reflect water in the influence of the vertical seepage flow of bituminous concrete and carload to bituminous concrete infiltration coefficient, dripped for correct evaluation
Blue or green concrete durability and water stability provide authentic data, and strong technology is provided for the design of bituminous concrete composition, construction
It supports, ensures the good road quality of asphalt concrete pavement.
Description of the drawings
Fig. 1 is the structure diagram of one specific embodiment of the utility model.
Fig. 2 is the partial enlargement structural representation at A in Fig. 1.
Fig. 3 is the partial enlargement structural representation at B in Fig. 2.
Fig. 4 is the partial enlargement structural representation at C in Fig. 2.
Fig. 5 is the structure diagram of outer sleeve in one specific embodiment of the utility model.
Fig. 6 is the structure diagram of lower cushion block in one specific embodiment of the utility model.
Fig. 7 is the schematic cross-sectional view of the e-e lines along Fig. 6.
Fig. 8 be first in one specific embodiment of the utility model on cap structure diagram.
Fig. 9 is the schematic cross-sectional view of the f-f lines along Fig. 8.
Figure 10 be second in one specific embodiment of the utility model on cap structure diagram.
Figure 11 is the schematic cross-sectional view of the g-g lines along Figure 10.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples：
As shown in Figure 1 to 11, a kind of bituminous concrete has pressure flexible wall infiltration experiment device, including the pedestal being in the form of a column
1,1 lower section of pedestal is provided with bearing 7, and rubber pad 32 is equipped on pedestal 1.1 edge of pedestal has been uniformly arranged 3 the first screw rods
10, outer sleeve 6 is provided on pedestal 1, outer sleeve 6 is stood on rubber pad 32 and positioned at 10 inside of the first screw rod.6 inside of outer sleeve
It is provided with rubber membrane (not shown).Columnar lower cushion block 2 is internally provided in rubber membrane on pedestal 1,2 top of lower cushion block is in cone
The angle α of shape, the 2 top conical surface of lower cushion block and horizontal plane is 10 °.2 peripheral-edge lower of lower cushion block is provided with the first chamfering, the first chamfering
Inside it is provided with the first rubber seal 21.2 top of lower cushion block is provided with cap 4 on columnar first, and 4 lower section of cap is in loudspeaker on first
Shape.4 top of cap is provided with cap 5 on columnar second on first, and 5 outer rim of cap lower section is provided with the second chamfering on second, and second falls
The second rubber seal 22 is provided in angle.It is both provided with and runs through in the middle part of cap 5 on cap 4 and second on pedestal 1, lower cushion block 2, first
The water passage of cylinder, the water passage diameter at 4 middle part of cap is identical on pedestal 1, lower cushion block 2, first, 4 middle part mistake of cap on first
The diameter D4 of aquaporin is less than the diameter D5 of 5 middle part water passage of cap on second.Interface is provided with below the water passage of pedestal 1
20.Graduated cylinder 33 is connected on first above the water passage of cap 4,33 lower section of graduated cylinder is provided with the first valve 19.
6 top of outer sleeve is provided with upper cover plate 8, and 8 one end of upper cover plate is fixed on by nut on the first screw rod 10, another
End is stretched into inside outer sleeve 6, and adjusting screw rod 30 is in contact through upper cover plate 8 with cap on second 5.
Snorkel 31 is embedded on 6 barrel of outer sleeve, rubber membrane is led in 31 one end of snorkel, and the other end is connected to band
The air accumulator 15 of air gauge (not shown) and vacuum pump 13,15 other end of air accumulator are connected with air compressor 14.Snorkel 31
The first air pressure regulator 11 is provided between air accumulator 15, the second valve 12 is provided between snorkel 31 and vacuum pump 13.
33 top of graduated cylinder is provided with water tank 24, gap 18 is provided on 33 side wall of graduated cylinder, gap 18 passes through check valve
17 are connected with closed tank 25, and closed tank 25 is connected by the second air pressure regulator 16 with snorkel 31 and air accumulator 15.
The utility model can meet varying head, permanent head and have pressure permeability test, obtain the pitch coagulation under different condition
The infiltration coefficient of soil provides authentic data for Concrete Pavement Durability, water stability evaluation.It is specific as follows：
A. variable head permeability test：
Rubber membrane is inserted in outer sleeve 6, and outer sleeve 6 is inserted on the pedestal 1 with rubber pad 32, then by lower cushion block 2, first
Rubber seal 21 closes the first air pressure regulator 11 loaded in outer sleeve 6, opens the second valve 12, starts vacuum pump 13 and takes out
Vacuum makes rubber membrane be adjacent to by outer sleeve 6, bituminous concrete test specimen 3 is put into rubber membrane, then cap on first 4 is placed in drip
On blue or green concrete sample 3, the second rubber seal 22 is put into, places into and 5 is emitted on second.Upper cover plate 8 is pierced into the first screw rod 10,
Be inserted into and tighten adjusting screw rod 30, the first rubber seal 21, the second rubber seal 22 are squeezed deformation, outer sleeve 6 with
Gastight confined space is formed between rubber membrane, the second valve 12 and vacuum machine is closed, stops vacuumizing.
The first air pressure regulator 11 is opened, starts air compressor 14 and starts to inflate confined space, reach certain pressure intensity,
0.1MPa is selected in the present embodiment, this step reaches side wall primarily to rubber membrane is made to be close to 3 side wall of bituminous concrete test specimen
It is water-tight.Water is filled into graduated cylinder 33, opens the first valve 19, water is allowed to flow out a period of time at the first valve 19, water is allowed to fill
Full entire bituminous concrete test specimen 3, to reduce error.Start timing t1 and register liquid level H in graduated cylinder, register off-test
Moment t2 simultaneously reads liquid level h in graduated cylinder.It is tested by permeability test, when using the very low test specimen that can not be seeped water of voidage
When, it tests after 1 hour that liquid level is unchanged in graduated cylinder, illustrates that side wall without leak, point-device can measure oozing for test specimen
Permeability.
Varying head osmotic coefficient k calculation formula (1)：
In formula, k is infiltration coefficient, unit cm/s.
A be graduated cylinder inner section area, unit cm2。
L is to permeate test specimen average height, unit cm.
A is to permeate test specimen cross-sectional area, unit cm2。
T is time of penetration t2-t1, unit s.
H be start timing liquid level, unit cm.
H be timing at the end of liquid level, unit cm.
B. constant head permeability test
Rubber membrane is inserted in outer sleeve 6, and outer sleeve 6 is inserted on the pedestal 1 with rubber pad 32, then by lower cushion block 2, first
Rubber seal 21 closes the first air pressure regulator 11 loaded in outer sleeve 6, opens the second valve 12, starts vacuum pump 13 and takes out
Vacuum makes rubber membrane be adjacent to by outer sleeve 6, bituminous concrete test specimen 3 is put into rubber membrane, then cap on first 4 is placed in drip
On blue or green concrete sample 3, the second rubber seal 22 is put into, places into and 5 is emitted on second.Upper cover plate 8 is pierced into the first screw rod 10,
Be inserted into and tighten adjusting screw rod 30, the first rubber seal 21, the second rubber seal 22 are squeezed deformation, outer sleeve 6 with
Gastight confined space is formed between rubber membrane, the second valve 12 and vacuum machine is closed, stops vacuumizing.
The first air pressure regulator 11 is opened, starts air compressor 14 and starts to inflate confined space, reach certain pressure intensity,
0.1MPa is selected in the present embodiment, this step reaches side wall primarily to rubber membrane is made to be close to 3 side wall of bituminous concrete test specimen
It is water-tight.Water is filled into graduated cylinder 33, opens the first valve 19, water is allowed to flow out a period of time at the first valve 19, water is allowed to fill
Full entire bituminous concrete test specimen 3, to reduce error.Water tank 24 is provided on graduated cylinder 33, water fills graduated cylinder 33, entirely tested
Keep water level constant by gap 18 in journey.Graduated cylinder is disposed in interface 20, is measured with stopwatch and examination is flowed through in specific time interval t
The total Water Q of sample, you can by formula (2) calculation permeability coefficient k.
Wherein, k is infiltration coefficient, unit cm/s；
A accumulates for specimen cross section, unit cm2；
L be seepage paths (i.e. specimen height), unit cm；
Q is total amount of seepage in t seconds time, unit cm3；
H is constant head, unit cm, present apparatus 25cm；
T is test period, unit s.
C. there is pressure permeability test
Rubber membrane is inserted in outer sleeve 6, and outer sleeve 6 is inserted on the pedestal 1 with rubber pad 32, then by lower cushion block 2, first
Rubber seal 21 closes the first air pressure regulator 11 loaded in outer sleeve 6, opens the second valve 12, starts vacuum pump 13 and takes out
Vacuum makes rubber membrane be adjacent to by outer sleeve 6, bituminous concrete test specimen 3 is put into rubber membrane, then cap on first 4 is placed in drip
On blue or green concrete sample 3, the second rubber seal 22 is put into, places into and 5 is emitted on second.Upper cover plate 8 is pierced into the first screw rod 10,
Be inserted into and tighten adjusting screw rod 30, the first rubber seal 21, the second rubber seal 22 are squeezed deformation, outer sleeve 6 with
Gastight confined space is formed between rubber membrane, the second valve 12 and vacuum machine is closed, stops vacuumizing.
The first air pressure regulator 11 is opened, starts air compressor 14 and starts to inflate confined space, reach certain pressure intensity,
0.1MPa is selected in the present embodiment, this step reaches side wall primarily to rubber membrane is made to be close to 3 side wall of bituminous concrete test specimen
It is water-tight.Water is filled into graduated cylinder 33, opens the first valve 19, water is allowed to flow out a period of time at the first valve 19, water is allowed to fill
Full entire bituminous concrete test specimen 3, to reduce error.
Water fills graduated cylinder 33, opens the first valve 19, allows 3 abundant water conservation of bituminous concrete test specimen for a period of time.Closing amount
33 tops of cylinder.Starting air compressor 14 makes air pressure reach specified value, adjusts the second air pressure regulator 16, air pressure is allowed to reach experiment
Required pressure value, hydraulic pressure is value shown by air gauge in closed tank 25 at this time.It should be noted that the pressure of air compressor machine is necessary
Higher than the value 0.1Mp of air gauge 7, this is the osmotic pressure in order to which permeameter side wall confining pressure is made to be more than water, prevents high pressure water from washing open
It is close to the rubber membrane of test specimen side wall, so as to prevent water from being leaked out from side wall.Graduated cylinder is put in interface 20, between measuring the stipulated time with stopwatch
Every the total Water Q that sample is flowed through in t, you can by formula (3) calculation permeability coefficient k.
In formula, k is infiltration coefficient, unit cm/s；
A accumulates for specimen cross section, unit cm2；
L be seepage paths, that is, specimen height, unit cm；
Q is total amount of seepage in t seconds time, unit cm3；
H is constant head, unit cm, present apparatus 25cm；
P be apply pressure, unit kpa；
ρ be water density, unit g/cm3；
G is acceleration of gravity, unit N/g；
T is test period, unit s.
The preferred embodiment of the utility model described in detail above.It should be appreciated that the ordinary skill people of this field
Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to the design of the utility model in domain
Available technical solution is tested, it all should be in the protection domain being defined in the patent claims.
Claims (10)
1. a kind of bituminous concrete has pressure flexible wall infiltration experiment device, it is characterized in that：It is described including the pedestal (1) being in the form of a column
Pedestal (1) edge has been uniformly arranged several first screw rods (10), and outer sleeve (6), the housing are provided on the pedestal (1)
Cylinder (6) is stood on the inside of first screw rod (10)；Rubber membrane is provided on the inside of the outer sleeve (6)；In institute on the pedestal (1)
It states rubber membrane and is internally provided with columnar lower cushion block (2), lower cushion block (2) peripheral-edge lower is provided with the first rubber seal
(21)；It is provided with cap (4) on columnar first above the lower cushion block (2), is provided on described first above cap (4) columnar
Cap (5) on second are provided with the second rubber seal (22), the pedestal (1), underlay on described second below cap (5) outer rim
Block (2) is both provided with water passage through cylinder on first in the middle part of cap (5) on cap (4) and second；Cap (4) on described first
Water passage above be connected with graduated cylinder (33), be provided with the first valve (19) below the graduated cylinder (33)；
Upper cover plate (8) is provided with above the outer sleeve (6), described upper cover plate (8) one end is fixed on described first by nut
On screw rod (10), it is internal that the other end stretches into the outer sleeve (6), and adjusting screw rod (30) is through the upper cover plate (8) and described the
Cap (5) is in contact on two；
Snorkel (31) is embedded on outer sleeve (6) barrel, the rubber membrane is led in described snorkel (31) one end, another
End is connected to barometric air accumulator (15) and vacuum pump (13), and air accumulator (15) other end is connected with air pressure
Contracting machine (14)；The first air pressure regulator (11), the snorkel are provided between the snorkel (31) and air accumulator (15)
(31) the second valve (12) is provided between vacuum pump (13).
2. bituminous concrete as described in claim 1 has pressure flexible wall infiltration experiment device, it is characterized in that：The pedestal (1)
On be equipped with rubber pad (32), the outer sleeve (6) is stood on the rubber pad (32).
3. bituminous concrete as described in claim 1 has pressure flexible wall infiltration experiment device, it is characterized in that：The lower cushion block
(2) peripheral-edge lower is provided with the first chamfering, to accommodate first rubber seal (21)；On described second under cap (5) outer rim
Side is provided with the second chamfering, to accommodate second rubber seal (22).
4. bituminous concrete as described in claim 1 has pressure flexible wall infiltration experiment device, it is characterized in that：The pedestal (1),
Lower cushion block (2), the water passage diameter on first in the middle part of cap (4) are identical, on described first in the middle part of cap (4) water passage diameter
(D4) it is less than the diameter (D5) of water passage in the middle part of cap (5) on described second.
5. bituminous concrete as described in claim 1 has pressure flexible wall infiltration experiment device, it is characterized in that：The lower cushion block
(2) top is tapered, and the angle (α) of the conical surface and horizontal plane is 10 ° above the lower cushion block (2).
6. bituminous concrete as described in claim 1 has pressure flexible wall infiltration experiment device, it is characterized in that：Cap on described first
(4) lower section is in horn-like.
7. bituminous concrete as described in claim 1 has pressure flexible wall infiltration experiment device, it is characterized in that：The pedestal (1)
Water passage below be provided with interface (20).
8. bituminous concrete as described in claim 1 has pressure flexible wall infiltration experiment device, it is characterized in that：The pedestal (1)
Lower section is provided with bearing (7).
9. bituminous concrete as described in claim 1 has pressure flexible wall infiltration experiment device, it is characterized in that：First screw rod
(10) quantity is 3.
10. the bituminous concrete as described in claim 1 to 9 is any has pressure flexible wall infiltration experiment device, it is characterized in that：It is described
Water tank (24) is provided with above graduated cylinder (33), gap (18), the gap (18) are provided on graduated cylinder (33) side wall
Closed tank (25) is connected with by check valve (17), the closed tank (25) by the second air pressure regulator (16) with it is described
Snorkel (31) is connected with air accumulator (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721569641.4U CN207396289U (en) | 2017-11-22 | 2017-11-22 | A kind of bituminous concrete has pressure flexible wall infiltration experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721569641.4U CN207396289U (en) | 2017-11-22 | 2017-11-22 | A kind of bituminous concrete has pressure flexible wall infiltration experiment device |
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| Publication Number | Publication Date |
|---|---|
| CN207396289U true CN207396289U (en) | 2018-05-22 |
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ID=62324112
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721569641.4U Expired - Fee Related CN207396289U (en) | 2017-11-22 | 2017-11-22 | A kind of bituminous concrete has pressure flexible wall infiltration experiment device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856026A (en) * | 2018-11-15 | 2019-06-07 | 华中科技大学 | A kind of device and method for testing seepy material coefficient of permeability |
| BE1026123B1 (en) * | 2018-08-10 | 2020-04-29 | Univ Xian Technology | PERMEABILITY DETECTION DEVICE FOR DAMAGED CONCRETE |
| CN112067529A (en) * | 2020-10-12 | 2020-12-11 | 长沙理工大学 | Permeable asphalt concrete permeability testing device and method |
| CN114235593A (en) * | 2021-12-16 | 2022-03-25 | 河海大学 | Hydraulic building high-molecular waterproof coating hydraulic pressure bonding failure test device and test method |
-
2017
- 2017-11-22 CN CN201721569641.4U patent/CN207396289U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1026123B1 (en) * | 2018-08-10 | 2020-04-29 | Univ Xian Technology | PERMEABILITY DETECTION DEVICE FOR DAMAGED CONCRETE |
| CN109856026A (en) * | 2018-11-15 | 2019-06-07 | 华中科技大学 | A kind of device and method for testing seepy material coefficient of permeability |
| CN109856026B (en) * | 2018-11-15 | 2020-06-02 | 华中科技大学 | Device and method for testing water permeability coefficient of water permeable material |
| CN112067529A (en) * | 2020-10-12 | 2020-12-11 | 长沙理工大学 | Permeable asphalt concrete permeability testing device and method |
| CN114235593A (en) * | 2021-12-16 | 2022-03-25 | 河海大学 | Hydraulic building high-molecular waterproof coating hydraulic pressure bonding failure test device and test method |
| CN114235593B (en) * | 2021-12-16 | 2024-04-19 | 河海大学 | Hydraulic bond damage test device and test method for high molecular waterproof coating of hydraulic building |
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