CN200968922Y - Extrusion side wall and flexible concrete drainage indicator - Google Patents
Extrusion side wall and flexible concrete drainage indicator Download PDFInfo
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- CN200968922Y CN200968922Y CN 200620157280 CN200620157280U CN200968922Y CN 200968922 Y CN200968922 Y CN 200968922Y CN 200620157280 CN200620157280 CN 200620157280 CN 200620157280 U CN200620157280 U CN 200620157280U CN 200968922 Y CN200968922 Y CN 200968922Y
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Abstract
The utility model discloses an extrusion side wall and flexible concrete permeameter, including a test piece cylinder, a drainpipe, a base and a vent pipe; the test piece cylinder has a taper structure and is connected with the base by a bolt through a lower board of the test piece cylinder; a porous disc is arranged between the test piece cylinder and the base, the top of the test piece cylinder is provided with a drainpipe and the bottom of the test piece cylinder is provided with the vent pipe; a support angle steel is arranged below the base, and the bottom of the base is provided with a tee. One side of the tee is communicated with the test piece cylinder, and other two sides of the tee are respectively communicated with a water pipe and a glass tube with scales. By adopting such structure, the utility model has the advantages of that the permeameter can be easily unloaded, the vent pipe is arranged below the taper test piece cylinder after installing the test piece behind the taper test piece cylinder thereby be convenient to exhaust when the cylinder is saturated; the utility model can not only carry out the low head permeability test but the high head permeability test; the utility model integrates the concrete permeability test equipment and the soil permeability test equipment together. The utility model also has the advantages of a simple structure, a convenient use and safety.
Description
Technical field
The utility model relates to a kind of instrument of measuring extrusion side wall and flexible concrete infiltration coefficient, particularly a kind of extrusion side wall and permeability testing machine of flexible concrete.
Background technology
Extrusion side wall is a kind of new material that development in recent years is got up, and between concrete slab and enrockment, its principal feature is low strong, low-elasticity-modulus, can adapt to the bigger distortion of earth and rockfill dam.Flexible concrete is positioned at the centre of earth and rockfill dam cofferdam, dykes and dams, mainly plays the antiseepage effect.Available coagulation soil permeameter adopts the taper test specimen, test be concrete anti-penetration grade, the pressure when promptly seeping water.Only observe the time and the pressure of top of concrete infiltration during test, this instrument can not write down the size of water percolating capacity, and output is not enough to provide the infiltration capacity of extrusion side wall, again because the section of test specimen is inhomogeneous, so can not adopt the concrete penetrometer device to calculate the infiltration coefficient of extrusion side wall and flexible material according to Darcy's law.The infiltration of existing coarse-grained soil is at diameter 300mm, test behind the infiltration instrument higher slice dress sample of height 600mm, because amount of seepage is big, head is generally about 10m, because the size of test chamber is bigger, be not suitable for the sealing and the loading and unloading of φ 150mm * 150mm right cylinder test specimen, and can not carry out the test of flexible material sample, the about 500kPa of the test pressure of flexible material.Extrusion side wall and flexible material all can not utilize the permeameter of existing soil or concrete penetrometer to test.
Summary of the invention
The purpose of this utility model will provide a kind of extrusion side wall and permeability testing machine of flexible concrete exactly, and it can overcome above-mentioned the deficiencies in the prior art, can test the infiltration coefficient of extrusion side wall and these two kinds of materials of flexible concrete more easily.
The purpose of this utility model is achieved in that a kind of extrusion side wall and permeability testing machine of flexible concrete, comprise test specimen tube 2, drainpipe 1, base 3 and gas outlet 4, test specimen tube 2 is a pyramidal structure, test specimen tube 2 links to each other with base 3 by bolt 6 by test specimen tube lower plate 5, be provided with porous disc 7 between test specimen tube 2 and the base 3, the top of test specimen tube 2 is provided with drainpipe 1, the bottom is provided with gas outlet 4, base 3 has and supports angle steel 11, the bottom of base 3 is provided with threeway 8, one end of threeway 8 communicates with test specimen tube 2, and two ends communicate with water pipe 9 and graduated glass tube 10 respectively in addition.
Owing to adopt said structure, so the utlity model has following characteristics: 1. test specimen is diameter 150mm, highly is the right cylinder of 150mm, the test specimen tube adopts taper, the material that adopts infiltration coefficient to be lower than test specimen between test specimen and the test specimen tube is filled, taper test specimen tube and base adopt the O-ring seal sealing, and be for convenience detach; 2. after test specimen was installed in taper test specimen tube, there was gas outlet its underpart, was convenient to exhaust when saturated; 3. can carry out the permeability test of low water head, also can carry out the permeability test of high water head, low water head is 0～2m, and high water head is 0～50m, can expand to 100m in case of necessity; 4. combine the advantage of the permeability test equipment of concrete permeability test equipment and soil.The utility model also has advantages such as simple in structure, easy to use, safe.
Description of drawings
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an embodiment synoptic diagram of the present utility model.
Wherein, Fig. 1 double as Figure of abstract.
Among the figure: 1, drainpipe, 2, the test specimen tube, 3, base, 4, gas outlet, 5, test specimen tube lower plate, 6, bolt, 7, porous disc, 8, threeway, 9, water pipe, 10, glass tube, 11, support angle steel, 12, test specimen.
Embodiment
As shown in Figure 1, a kind of extrusion side wall and permeability testing machine of flexible concrete, comprise test specimen tube 2, drainpipe 1, base 3 and gas outlet 4, test specimen tube 2 is a pyramidal structure, test specimen tube 2 links to each other with base 3 by bolt 6 by test specimen tube lower plate 5, be provided with porous disc 7 between test specimen tube 2 and the base 3, the top of test specimen tube 2 is provided with drainpipe 1, the bottom is provided with gas outlet 4, base 3 has and supports angle steel 11, the bottom of base 3 is provided with threeway 8, and an end of threeway 8 communicates with test specimen tube 2, and two ends communicate with water pipe 9 and graduated glass tube 10 respectively in addition.
The test philosophy of infiltration coefficient: according to Darcy's law, the permeance property of soil sample is meant the ability of current by the soil pores, after sample is saturated, under certain head effect, pass through the water percolating capacity of sample and the ratio of hydraulic slope in unit interval, the unit area, hydraulic slope is that the ratio of head and test specimen height is infiltration coefficient, and concrete computing formula is as follows:
K in the formula
T---the infiltration coefficient of sample (cm/s) when water temperature is T ℃
Ooze out the water yield (cm in Q---time t second
3)
The height of L---test specimen (cm)
H---head difference (cm)
T---the time (s)
Generally speaking, the infiltration coefficient of extrusion side wall is 10
-2～10
-3About cm/s, the infiltration coefficient of flexible concrete is 10
-7About cm/s, consider that the amount of seepage difference of the two is bigger, the utility model adopts constant head to test, and to the head of extrusion side wall employing 0～2m, with the test of the steel ruler behind glass tube upstream head, amount of seepage adopts the graduated cylinder of 1000ml to measure; Flexible concrete then adopts nitrogen cylinder to pressurize by the water in the glass tube, and its pressure is generally 0～500kPa, and amount of seepage adopts the decline of glass tube middle water level to calculate.
As shown in Figure 2, the step of extrusion side wall and flexible concrete infiltration coefficient test is:
1. the preparation of instrument and equipment and material
1) extrusion side wall and permeability testing machine of flexible concrete
2) pressurized equipment (glass tube that has scale) of band nitrogen cylinder, the infiltration coefficient of test flexible concrete is used
3) tap water
4) be installed in glass tube on the wall, with steel tape, about 4m height
5) right cylinder die trial, internal diameter 150mm, height 150mm
6) glass cylinder of 1000ml
2. testing procedure
1) carries out the making and the maintenance of test specimen 12 according to " the indoor mixing method of concrete mix " and " moulding of concrete sample and maintenance process ".3 test specimens are one group.
2) after test specimen 12 form removals, brush away the grout of flexible concrete test specimen 12 both ends of the surface with wire brush, extrusion side wall then need not, send into the fog room maintenance.
3) the previous day in the length of time is tested in arrival, takes out test specimen 12, wiped clean, and the height L of test test specimen 12 is measured test specimen 12 diameters and is 90 ° of height of locating, averages.After treating that the surface is dried, test specimen 12 is changed in the test specimen tube 2, sand-cement slurry or cement butter are filled in the gap.Notice that test specimen 12 must not stop up gas outlet 4.Test specimen 12 is installed and is seen Fig. 2.
4) promptly arrive test in second day during the length of time, adopt bolts 6 to fix the base 3 of test specimen tube 2 and permeameter, require to place O-ring seal.
5) for extrusion side wall, tap water is inserted the threeway 8 of permeameter bottom by water pipe 9, glass tube on another termination wall of threeway 8 (please noting the bottom of the scale 0 of steel tape during erecting equipment) corresponding to test specimen, in order to test upstream head, permeameter is tilted, make gas outlet 4 upwards, get rid of test specimen 12 and the interior air of base 3 cavitys, it is saturated to carry out test specimen 12 then, until test specimen 12 end face water outlets, and the scale h1 of record steel tape.Adjust the size of inflow, the height h2 at water surface distance test specimen top is write down out at the top that makes the water at test specimen top not overflow drainpipe 1.Formally begin test, the aquifer yield Q (cm in the record certain hour t (s)
3), aquifer yield has the graduated cylinder at drainpipe 1 place to measure.Head difference is H=h1-h2-L (cm).
6) for flexible material, glass tube 10 usefulness flexible pipes in the pressurized equipment (glass tube that has scale) of band nitrogen cylinder are inserted the threeway 8 of permeameter bottom, the other end sealing of threeway 8, permeameter is tilted, make gas outlet 4 upwards, get rid of test specimen 10 and the interior air of base 3 cavitys, then to test specimen 12 pressurizations, it is saturated to carry out test specimen 12, until test specimen 12 end face water outlets, exerting pressure initially can tune to 50kPa, as test specimen 12 not water outlets of end face in 8 hours, can increase progressively according to the force value of 50kPa or 100kPa, saturated until test specimen 12.After test specimen 12 is saturated, read pressure P (kPa) and voltage stabilizing, the drop-out value Q (cm of the water yields in the glass tube 10 in the record record certain hour t (s)
3), the drop-out value of the water yield is read by the scale in the glass tube 10.Head difference is H=P * 10, the cm of unit.
7) be calculated as follows infiltration coefficient:
K in the formula
T---the infiltration coefficient of sample (cm/s) when water temperature is T ℃
Ooze out the water yield (cm in Q---time t second
3)
The height of L---test specimen (cm)
H---head difference (cm)
T---the time (s)
8) infiltration coefficient under the standard temperature is calculated as follows:
K in the formula
T---the infiltration coefficient of sample (cm/s) when water temperature is T ℃
K
20---the infiltration coefficient of sample (cm/s) when water temperature is 20 ℃
η
T---the coefficient of dynamic viscosity of sample (kPas) when water temperature is T ℃
η
20---the coefficient of dynamic viscosity of sample (kPas) when water temperature is 20 ℃
9) result treatment
Each test specimen 12 carries out permeability test three times, averages.The infiltration coefficient of three test specimens 12 adopts scientific notation to represent as the infiltration coefficient of this group test specimen 12, is accurate to behind the radix point 1.
Claims (1)
1, a kind of extrusion side wall and permeability testing machine of flexible concrete, comprise test specimen tube (2), drainpipe (1), base (3) and gas outlet (4), it is characterized in that: test specimen tube (2) is pyramidal structure, test specimen tube (2) links to each other with base (3) by bolt (6) by test specimen tube lower plate (5), be provided with porous disc (7) between test specimen tube (2) and the base (3), the top of test specimen tube (2) is provided with drainpipe (1), the bottom is provided with gas outlet (4), base (3) has and supports angle steel (11), the bottom of base (3) is provided with threeway (8), one end of threeway (8) communicates with test specimen tube (2), and two ends communicate with water pipe (9) and graduated glass tube (10) respectively in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620157280 CN200968922Y (en) | 2006-11-10 | 2006-11-10 | Extrusion side wall and flexible concrete drainage indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620157280 CN200968922Y (en) | 2006-11-10 | 2006-11-10 | Extrusion side wall and flexible concrete drainage indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200968922Y true CN200968922Y (en) | 2007-10-31 |
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|---|---|---|---|
| CN 200620157280 Expired - Fee Related CN200968922Y (en) | 2006-11-10 | 2006-11-10 | Extrusion side wall and flexible concrete drainage indicator |
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| CN (1) | CN200968922Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644822A (en) * | 2016-12-15 | 2017-05-10 | 嘉华特种水泥股份有限公司 | Concrete permeability coefficient testing method and concrete permeability coefficient testing device |
| CN109696387A (en) * | 2018-12-27 | 2019-04-30 | 青岛理工大学 | The device and method of accurate measurement concrete permeability |
-
2006
- 2006-11-10 CN CN 200620157280 patent/CN200968922Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644822A (en) * | 2016-12-15 | 2017-05-10 | 嘉华特种水泥股份有限公司 | Concrete permeability coefficient testing method and concrete permeability coefficient testing device |
| CN109696387A (en) * | 2018-12-27 | 2019-04-30 | 青岛理工大学 | The device and method of accurate measurement concrete permeability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GEZHOUBA GROUP TEST DETECTION CO., LTD. Free format text: FORMER OWNER: HUBEI GEZHOUBA TESTING MEASURE CO., LTD. Effective date: 20090605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090605 Address after: Hubei province Yichang City Qing Road No. 25, zip code: 443002 Patentee after: Gezhouba Testing Co., Ltd. Address before: Hubei province Yichang City Qing Road No. 25, zip code: 443002 Patentee before: Hubei Gezhouba Testing Detection Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071031 Termination date: 20131110 |