CN201965079U - Multi-gradient seepage tester - Google Patents

Multi-gradient seepage tester Download PDF

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Publication number
CN201965079U
CN201965079U CN2011200088387U CN201120008838U CN201965079U CN 201965079 U CN201965079 U CN 201965079U CN 2011200088387 U CN2011200088387 U CN 2011200088387U CN 201120008838 U CN201120008838 U CN 201120008838U CN 201965079 U CN201965079 U CN 201965079U
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water
test specimen
groove
water inlet
seepage
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CN2011200088387U
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张争奇
雷宗建
周亮
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Changan University
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Changan University
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Abstract

The utility model discloses a multi-gradient seepage tester, which comprises a test piece groove. One end of the test piece groove is provided with a water outlet seam. The water inlet seam is connected with a water inlet groove. The water inlet groove is connected with a water inlet pipe. The water inlet pipe is provided with a water inlet valve. The water inlet pipe is connected with a measuring cylinder. The bottom of the test piece groove is provided with a threaded gasket. The threaded gasket is positioned below the water inlet seam. The threaded gasket is provided with an expansion ruler with scales. The threaded gasket is also provided with a lifting screw. The other end of the test piece groove is provided with a non-seepage water outlet and an influent seepage water outlet groove. The non-seepage water outlet is positioned above the influent seepage water outlet groove and is lower than the upper edge of the test piece groove. The multi-gradient seepage tester not only can be used for measuring the seepage condition of a test piece in the horizontal state, but also can be used for testing a seepage coefficient of the test piece at different gradients, has a simple structure, is convenient to use, has high measurement accuracy and a low production cost and is convenient to popularize and use.

Description

Many gradients water test instrument
Technical field
The utility model relates to a kind of water test instrument, particularly relates to a kind of many gradients water test instrument.
Background technology
The early damage of bituminous pavement is quite serious now, wherein, because the road surface infiltration causes the destruction that subgrade rating decline takes place to account for sizable ratio.Although the structural design of asphalt emphasizes that it is fluid-tight substantially that asphalt mat must have more than one deck, but because the match ratio design phase does not require infiltration coefficient, the infiltration situation on road surface is felt unsure of, and can only arrive compound and be taped against on the road surface and each layer making could be done water penetration test to bituminous pavement after finishing.At this moment, even the road surface is permeable serious, there has not been remedial measure yet.Thus, the water penetration test that the Bitumen Mix Design stage is carried out asphalt is very important, so that the ability of prediction bituminous pavement anti-water damage.
The method of testing of tradition infiltration coefficient tester is: the bitumen mixture specimen of making 30cm * 30cm * 5cm with the roller-compaction legal system, test specimen is positioned on the solid plane, smear the skim encapsulant in test specimen surface upper edge infiltration instrument base circled positions, close the switch of infiltration instrument water inlet pipe, in the graduated cylinder of instrument top, inject pink water to full, open the water inlet pipe switch rapidly, when treating in the graduated cylinder water surface decline 100ml, start stopwatch immediately, every interval 60s reads to remember the scale of instrumentation tube, till water surface decline 500ml, then according to water percolating capacity and infiltration time, the infiltration coefficient of calculation testing piece.
Though this method can record the infiltration coefficient of test specimen, there are some defectives in it in the simulation actual condition:
(1) in traditional infiltration coefficient method of testing, test specimen keeps flat, and can only simulate the seepage of water of asphalt on the surface road, and in fact road not only has flat, also have horizontal wall inscription and longitudinal gradient, and under the different gradient because the water velocity difference, water percolating capacity also is inequality;
(2) in traditional infiltration coefficient method of testing, water is to ooze under the form static state with ponding under certain hydraulic pressure, and the water on the road surface in fact not only has the form of oozing under the ponding, oozes under in the cross flow process under the more susceptible condition;
(3) in traditional infiltration coefficient method of testing, because the restriction of test apparatus and test condition, the test point area of selection is very little, and test point is chosen has contingency, and test result differs greatly.
The utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, and a kind of many gradients water test instrument is provided.This many gradients water test instrument not only can be measured the infiltration situation of test specimen under the horizontality, can also test the infiltration coefficient of test specimen under different gradient, and it is simple in structure, easy to use, measuring accuracy is high, production cost is low, is convenient to promote the use of.
For achieving the above object, the technical solution adopted in the utility model is: many gradients water test instrument, it is characterized in that: comprise the test specimen groove, one end of described test specimen groove is provided with watering slot, described watering slot is connected with intake chamber, described intake chamber is connected with water inlet pipe, and described water inlet pipe is provided with water intaking valve, and described water inlet pipe is connected with graduated cylinder; The bottom of described test specimen groove is provided with thread spacer, and described thread spacer is positioned at the below of watering slot, and described thread spacer is provided with the shrinkage-rule that is carved with scale, also is provided with lifting screw on the described thread spacer; The other end of described test specimen groove is provided with the do not seep water water delivering orifice and the effluent trough that seeps water down, and the described water delivering orifice that do not seep water is positioned at the top of the effluent trough that seeps water down and is lower than the upper edge of described test specimen groove.
Above-mentioned many gradients water test instrument, the bottom of the described test specimen groove other end is provided with cushion block.
Above-mentioned many gradients water test instrument, the described effluent trough of infiltration down is downward-sloping with respect to the test specimen groove.
The utility model compared with prior art has the following advantages:
1, the utility model not only can be measured the infiltration coefficient of test specimen under the horizontality, and the different operating modes of energy simulated roadway, measures the infiltration coefficient of test specimen under different gradient.The utility model is provided with shrinkage-rule and lifting screw, and the scale unit on the shrinkage-rule is angled by height conversion, raises test specimen groove one end by turning lifting screw, can directly read gradient from shrinkage-rule.
2, ooze under the form of the water on the test specimen with cross flow, more approaching with actual condition.After asphalt is taped against on the road surface, because road camber and longitudinal gradient, inevitably have some gradients, water is being to ooze under while trickling on the road surface.Tradition is surveyed in the method for infiltration coefficient, and water is directly to ooze down in the mode of ponding (water column) in test point, and this does not conform to reality.In this many gradients water test instrument, water evenly flows on the test specimen from watering slot, oozes under while flowing, and is more realistic.
3, adopt the water inlet form of intake chamber and watering slot, water can flow through the whole section of test specimen uniformly.If water flows to test specimen by water inlet pipe, current can only be spread towards periphery by water-drop point, and especially on the inclination test specimen, current direction is dirty but can not so just cause the water to ooze under the part of test specimen to test specimen both sides stream, does not conform to the actual conditions.
4, the precision and the correlativity of different test specimen test results have been improved.With respect to classic method, test area reaches 900cm 2, enlarged test area greatly, reduced the contingency that test point is selected to a great extent., also just reduced different test specimen test result differences.
5, not only can analog stream ooze mode under water, and after the water delivering orifice that do not seep water is blocked, can also simulate under the ponding and ooze mode.The water that trickling is not only arranged on the road surface also has ponding, the following mode difference of oozing of water under two kinds of situations, and infiltration coefficient is also different, need compare the comprehensive evaluation seepage of water to the infiltration coefficient that oozes under the mode under two kinds.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is a main TV structure synoptic diagram of the present utility model.
Fig. 2 is the structural representation of the utility model test specimen groove.
Description of reference numerals:
The 1-lifting screw; The 2-shrinkage-rule; The 3-watering slot;
The 4-water delivering orifice that do not seep water; 5-is the infiltration effluent trough down; 6-test specimen groove;
The 7-thread spacer; The 8-cushion block; The 9-water intaking valve;
The 10-intake chamber; The 11-water inlet pipe; The 12-graduated cylinder.
Embodiment
A kind of many gradients water test instrument as depicted in figs. 1 and 2, comprise test specimen groove 6, one end of described test specimen groove 6 is provided with watering slot 3, described watering slot 3 is connected with intake chamber 10, described intake chamber 10 is connected with water inlet pipe 11, described water inlet pipe 11 is provided with water intaking valve 9, and described water inlet pipe 11 is connected with graduated cylinder 12; The bottom of described test specimen groove 6 is provided with thread spacer 7, and described thread spacer 7 is positioned at the below of watering slot 3, and described thread spacer 7 is provided with the shrinkage-rule 2 that is carved with scale, also is provided with lifting screw 1 on the described thread spacer 7; The other end of described test specimen groove 6 is provided with the do not seep water water delivering orifice 4 and the effluent trough 5 that seeps water down, and the described water delivering orifice 4 that do not seep water is positioned at the top of the effluent trough 5 that seeps water down and is lower than the upper edge of described test specimen groove 6.
As depicted in figs. 1 and 2, preferred way is that the bottom of the other end of described test specimen groove 6 is provided with cushion block 8.Be the lifting of test specimen groove 6 one ends by cushion block 8 is set, an effective fulcrum is provided.
As shown in Figure 2, preferred as another kind, the described effluent trough 5 of infiltration down is downward-sloping with respect to test specimen groove 6.Infiltration effluent trough 5 can be discharged infiltration fast.
During use, test specimen put into test specimen groove 6 fixing after, expect around test specimen groove 6 sealed test piece (the water delivering orifice 4 places blow-by of not seeping water) with sealings such as butter or plasticine; Turn lifting screw 1 and raise an end of test specimen groove 6, measure the angle that test specimen groove 6 tilts with shrinkage-rule 2 simultaneously, till being lifted to the pre-determined tilt gradient; Open water intaking valve 9, allow water flow in the intake chamber 10, and then by watering slot 3, evenly cross flow is to test specimen; Timing and measurement flow into test specimen groove 6 and flow out the volume of the water of the do not seep water water delivering orifice 4 and the effluent trough 5 that seeps water down, calculate infiltration coefficient.
Wherein, shrinkage-rule 2 scale transfer principles are: the length l of test specimen groove 6 is known, turns the end that lifting screw 1 is raised test specimen groove 6, according to shrinkage-rule 2 extended length h, then as can be known:
Figure BDA0000043609700000041
So can calculate the gradient
Figure BDA0000043609700000042
And corresponding gradient α value is marked on the shrinkage-rule 2.Like this, α is corresponding mutually with h, has reduced loaded down with trivial details calculating in the gradient adjustment process.
Be described further in conjunction with the using method of example more below this utility model:
Step 1, preliminary work.Splashing into several red ink in the bucket of cleaning, make water become pale red, is that the bitumen mixture specimen of 30cm * 30cm * 5cm is standby according to roller-compaction method manufacturing specification.
Step 2, should be placed on the test platform by many gradients water test instrument, the test specimen of making is put into test specimen groove 6, fix test specimen.Along the engagement edge of test specimen groove 6 with test specimen, smear one deck encapsulant, tight while being coated with hand, make the slit of the full test specimen of encapsulant embedding surface compound, and be bonded in securely on the test specimen, the girth on the girth of O-ring seal and test specimen plane is similar.But notice that the water delivering orifice 4 that do not seep water is not wanted sealed material and blocked, and will guarantee that water can smooth and easy outflow.
Step 3, turn the end that lifting screw 1 is raised test specimen groove 6, measure the gradient that test specimen grooves 6 tilt with shrinkage-rule 2 simultaneously, till being lifted to the pre-determined tilt gradient.
Step 4, close all switches, in graduated cylinder 12, inject pink water to full, the about 2000ml of total amount, simultaneously, the water delivering orifice 4 and the effluent trough 5 that seeps water down do not place the water receiving graduated cylinder seeping water.
Step 5, open water inlet pipe 11 and water intaking valve 9 rapidly, water begins slowly to flow into the intake chamber 10 from water inlet pipe 11, evenly flows in the test specimen of test specimen groove 6 by the form of watering slot 3 with cross flow again.When treating in the graduated cylinder 12 water surface decline 100ml, start stopwatch immediately, the scale in graduated cylinder 12 of 60s record, when water surface decline 2000ml till.Very slow as water surface decline rate, from water surface decline 100ml, the water percolating capacity that records 3min can stop.If it is motionless that to a certain degree basic maintenance is reduced in the underwater during test, illustrate that test specimen is waterproof substantially or not permeable, then in report, indicate.
Step 6, test a test specimen after, read and write down the volume of the water that the water receiving graduated cylinder at water delivering orifice 4 places collects of not seeping water.
Step 7, calculating.It is standard that the infiltration coefficient of bitumen mixture specimen drops to the required time of 2000ml with the water surface from 100ml when calculating, if the infiltration overlong time, the water yield that also can adopt 3min to pass through is calculated.When measuring the infiltration coefficient that water oozes under with flowing water, directly calculate according to formula (1); When measuring the infiltration coefficient that water oozes under with ponding, block the water delivering orifice 4 that do not seep water during test, open the water delivering orifice 4 that do not seep water after the end of test (EOT) immediately and emit and do not seep water and measure, calculate according to formula (1) again;
C w = V 2 - V 1 - V 3 t 2 - t 1 × 60 - - - ( 1 )
In the formula: C w---the infiltration coefficient of bitumen mixture specimen, ml/min;
V 1---the water yield (being generally 100ml) during reading for the first time, ml;
V 2---the water yield (being generally 2000ml) during reading for the second time, ml;
V 3---the water yield that the water delivering orifice graduated cylinder that do not seep water is collected, ml;
t 1---time during reading for the first time, s;
t 2---time during reading for the first time, s.
Step 8, according to above step commaterial is made three test specimens and measure infiltration coefficients, get its mean value, as testing result.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; every according to the utility model technical spirit to any simple modification, change and equivalent structure transformation that above embodiment did, all still belong in the protection domain of technical solutions of the utility model.

Claims (3)

1. many gradients water test instrument, it is characterized in that: comprise test specimen groove (6), one end of described test specimen groove (6) is provided with watering slot (3), described watering slot (3) is connected with intake chamber (10), described intake chamber (10) is connected with water inlet pipe (11), described water inlet pipe (11) is provided with water intaking valve (9), and described water inlet pipe (11) is connected with graduated cylinder (12); The bottom of described test specimen groove (6) is provided with thread spacer (7), and described thread spacer (7) is positioned at the below of watering slot (3), described thread spacer (7) is provided with the shrinkage-rule (2) that is carved with scale, also is provided with lifting screw (1) on the described thread spacer (7); The other end of described test specimen groove (6) is provided with the water delivering orifice that do not seep water (4) and the effluent trough (5) that seeps water down, and the described water delivering orifice that do not seep water (4) is positioned at the top of the effluent trough (5) that seeps water down and is lower than the upper edge of described test specimen groove (6).
2. many gradients water test instrument according to claim 1 is characterized in that: the bottom of described test specimen groove (6) other end is provided with cushion block (8).
3. many gradients water test instrument according to claim 1 is characterized in that: described infiltration effluent trough (5) down is downward-sloping with respect to test specimen groove (6).
CN2011200088387U 2011-01-12 2011-01-12 Multi-gradient seepage tester Expired - Fee Related CN201965079U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102507410A (en) * 2011-10-14 2012-06-20 河海大学 Device and method for simultaneously testing water seepage and drainage capacities of asphalt mixture
CN103323381A (en) * 2013-06-09 2013-09-25 河海大学 Method for evaluating attenuation degree of porous asphalt mixture void
CN104677800A (en) * 2015-02-03 2015-06-03 云南省交通规划设计研究院 Simulated rainfall pattern macro-porous pavement water drainage capacity testing equipment and method
CN106840997A (en) * 2016-12-29 2017-06-13 河海大学 The estimation device and method of big space bituminous paving horizontal infiltration flow
CN107843538A (en) * 2017-11-29 2018-03-27 长安大学 Pave-load layer infiltration emits Fluid Dynamics tester
CN108732328A (en) * 2018-05-14 2018-11-02 安徽省（水利部淮河水利委员会）水利科学研究院（安徽省水利工程质量检测中心站） A kind of bracing means for preventing hillside fields lysimeter from falling after rise
CN112730199A (en) * 2021-02-01 2021-04-30 温州市市政工程建设开发公司 Water permeability detection device and method for permeable asphalt concrete

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102507410A (en) * 2011-10-14 2012-06-20 河海大学 Device and method for simultaneously testing water seepage and drainage capacities of asphalt mixture
CN103323381A (en) * 2013-06-09 2013-09-25 河海大学 Method for evaluating attenuation degree of porous asphalt mixture void
CN104677800A (en) * 2015-02-03 2015-06-03 云南省交通规划设计研究院 Simulated rainfall pattern macro-porous pavement water drainage capacity testing equipment and method
CN106840997A (en) * 2016-12-29 2017-06-13 河海大学 The estimation device and method of big space bituminous paving horizontal infiltration flow
CN106840997B (en) * 2016-12-29 2019-08-20 河海大学 The estimation device and method of big gap bituminous pavement horizontal infiltration flow
CN107843538A (en) * 2017-11-29 2018-03-27 长安大学 Pave-load layer infiltration emits Fluid Dynamics tester
CN108732328A (en) * 2018-05-14 2018-11-02 安徽省（水利部淮河水利委员会）水利科学研究院（安徽省水利工程质量检测中心站） A kind of bracing means for preventing hillside fields lysimeter from falling after rise
CN112730199A (en) * 2021-02-01 2021-04-30 温州市市政工程建设开发公司 Water permeability detection device and method for permeable asphalt concrete

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Granted publication date: 20110907

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