CN209069796U - The concrete impermeability test device of elimination of level circumferential pressure - Google Patents
The concrete impermeability test device of elimination of level circumferential pressure Download PDFInfo
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- CN209069796U CN209069796U CN201821783117.1U CN201821783117U CN209069796U CN 209069796 U CN209069796 U CN 209069796U CN 201821783117 U CN201821783117 U CN 201821783117U CN 209069796 U CN209069796 U CN 209069796U
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- punching block
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- concrete
- elimination
- upper plate
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- 238000012360 testing method Methods 0.000 title claims abstract description 80
- 230000008030 elimination Effects 0.000 title claims abstract description 14
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 14
- 238000004080 punching Methods 0.000 claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 25
- 238000001764 infiltration Methods 0.000 description 25
- 230000008595 infiltration Effects 0.000 description 25
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000003487 anti-permeability effect Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
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- 238000005303 weighing Methods 0.000 description 2
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- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
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- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- 230000003313 weakening effect Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of concrete impermeability test device of elimination of level circumferential pressure, including punching block and limit adjusting mechanism；For punching block with the inner cavity with test specimen with identical taper, the upper section of the punching block lateral wall is straight wall section, and external thread section is equipped in straight wall section；The limit adjusting mechanism includes rotation steel bushing, connecting rod and steel washer, and the rotation steel bushing includes upper plate and encloses in upper plate excircle and the cylindric coaming plate that extends downwardly, and the inner wall of coaming plate is equipped with the internal thread segment cooperated with external thread section；Multiple connecting rods, multiple connecting rods annular equidistant placement centered on punching block axle center are fixed in steel washer coaxial arrangement inside punching block, on steel washer；The other end of connecting rod is fixedly connected on the lower end surface of upper plate.The device can obvious elimination of level circumferential pressure, improve test efficiency and precision, test specimen stress during the test and water percolating capacity can be made to be more evenly distributed, objective and accurate obtains the actual impermeability of concrete, and the test result obtained is more reliable.
Description
Technical field
The utility model relates to a kind of concrete impermeability test devices of elimination of level circumferential pressure, belong to concrete experiments
Technical field.
Background technique
The anti-permeability performance of concrete is a basic performance of concrete, in underground engineering or other has antiseepage requirement
The performance is particularly important in engineering structure.The performance is detected using impermeability test detection device by impermeability test.It is common
Impervious detection device be the concrete impervious instrument of HP-4.0 type, mainly by rack die trial, separator, water pump, water tank and electrical
Control device composition, the pressure principle of the pipe-line system communicated therewith using sealing container everywhere, is pressed, and lead to water pump
Crossing intelligent numerical control meter keeps pressure to be tested within the limits prescribed.
Wherein rack die trial (punching block) is taper type without upper cover telescoping structure, and internal diameter gradually becomes smaller from the bottom to top,
During carrying out concrete impermeability test with existing rack die trial, the pressure of water along the bottom-up application of test specimen axis, and
Vertical direction is according to the equilibrium condition of power, the component straight down of the pressure between concrete test block and punching block and upward water pressure
It balances each other, due to the punching block inclined angle very little, the water pressure to balance upward just needs great concrete and steel
The pressure of intermode, and the horizontal component of this pressure will circumferential direction be applied in concrete impervious test block, cause water-tight concrete to try
Block is by biggish horizontal direction compression.
Since the presence of horizontal circumferential pressure effect causes impervious so that the vertical hole of concrete, hole are compressed
The anti-permeability performance of test block concrete greatly improves, and then can over-evaluate the anti-permeability performance of concrete, and mixed in Practical Project
The horizontal circumferential pressure is then not present in solidifying soil, and the practical anti-permeability performance of concrete is much smaller than the impermeability that experiment obtains, therefore
There is biggish security risk in engineer application, concrete structure infiltration situation can be found everywhere.
Summary of the invention
In view of the above-mentioned problems of the prior art, the utility model provides a kind of concrete of elimination of level circumferential pressure
Anti-leakage detector for water, the obvious elimination of level circumferential pressure of device energy, improves test efficiency and precision, test specimen can be made to test
Stress and water percolating capacity in journey are more evenly distributed, and objective and accurate obtains the actual impermeability of concrete, the test knot obtained
Fruit is more reliable.
To achieve the goals above, the utility model provides a kind of concrete impermeability test dress of elimination of level circumferential pressure
It sets, including punching block and limit adjusting mechanism；Punching block with test specimen have identical taper inner cavity, the punching block lateral wall it is upper
Section is straight wall section, and external thread section is equipped in straight wall section；
The limit adjusting mechanism includes rotation steel bushing, connecting rod and steel washer, the rotation steel bushing include upper plate with
It encloses in upper plate excircle and the cylindric coaming plate that extends downwardly, the inner wall of coaming plate is equipped with the interior spiral shell cooperated with external thread section
Line section；
Multiple connecting rods are fixed in steel washer coaxial arrangement inside punching block, on steel washer, and multiple connecting rods are with punching block axle center
Centered on annular equidistant placement；The other end of connecting rod is fixedly connected on the lower end surface of upper plate.
Further, the upper plate center opens up through-hole.
Further, the connecting rod is equipped with 6.
Compared with prior art, which makes steel pad by the way that height-adjustable steel washer is arranged inside punching block
The lower end surface of circle can be in close contact in test with the upper surface of test specimen, to jack during impermeability test to test specimen
To position-limiting action, greatly reduce and the effect of elimination of level circumferential pressure, test specimen stress during the test and infiltration can be made
Amount is more evenly distributed, and seepage velocity can be made to accelerate, and the liquid level that makes to seep water is in horizontal line distribution, so that objective and accurate obtains concrete
Actual impermeability improves test validity and precision.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the utility model；
Fig. 2 is the longitudinal sectional drawing of Fig. 1；
Fig. 3 is that the vertical section infiltration situation after being tested under 1.2MPa pressure test specimen one using existing punching block is shown
It is intended to；
Fig. 4 is that the vertical section infiltration situation after being tested under 1.2MPa pressure test specimen two using existing punching block is shown
It is intended to；
Fig. 5 is that the vertical section infiltration situation after being tested under 1.2MPa pressure test specimen three using existing punching block is shown
It is intended to；
Fig. 6 is that the vertical section infiltration situation after being tested under 1.2MPa pressure test specimen four using existing punching block is shown
It is intended to；
Fig. 7 is that the vertical section infiltration situation after being tested under 3.6MPa pressure test specimen five using existing punching block is shown
It is intended to；
Fig. 8 is that the vertical section infiltration situation after being tested under 3.6MPa pressure test specimen six using existing punching block is shown
It is intended to；
Fig. 9 is the infiltration situation schematic diagram using existing punching block to the vertical section after a specimen test；
Figure 10 is illustrated using infiltration situation of the punching block in the utility model to the vertical section after another specimen test
Figure；
Figure 11 is the schematic diagram for establishing contact squeeze model to existing punching block using finite element analysis software；
Figure 12 is the concrete test block internal water concora crush obtained under traditional punching block 3.6MPa water pressure by numerical simulation
Stress distribution cloud atlas；
In figure: 1, punching block, 2, external thread section, 3, limit adjusting mechanism, 4, rotation steel bushing, 5, connecting rod, 6, steel washer, 7,
Upper plate, 8, coaming plate, 9, internal thread segment, 10, through-hole.
Specific embodiment
Below with reference to embodiment, the utility model is described in further detail.
As depicted in figs. 1 and 2, a kind of concrete impermeability test device of elimination of level circumferential pressure, including punching block 1 and limit
Position regulating mechanism 3；Punching block 1 is straight wall section with the inner cavity with test specimen with identical taper, the upper section of 1 lateral wall of punching block,
And external thread section 2 is equipped in straight wall section；
The limit adjusting mechanism 3 includes rotation steel bushing 4, connecting rod 5 and steel washer 6, and the rotation steel bushing 4 includes upper top
It plate 7 and encloses in 7 excircle of upper plate and the cylindric coaming plate 8 that extends downwardly, the inner wall of coaming plate 8 is equipped with and external thread section 2
The internal thread segment 9 of cooperation；
Steel washer 6 is coaxially disposed inside punching block 1, fixes multiple connecting rods 5 on steel washer 6, and multiple connecting rods 5 are with punching block
Annular equidistant placement centered on 1 axle center；The other end of connecting rod 5 is fixedly connected on the lower end surface of upper plate 7.
For convenience of observing and adjusting steel washer 6,7 center of upper plate opens up through-hole 10, the diameter of through-hole 10
It can be 20mm.
Weakening of the setting concentrated in order to avoid connecting rod 5 to the local bearing capacity of steel washer 6, the connecting rod 5 are equipped with 6
It is a.
Preferential as one kind, the inner ring radius of the steel washer 6 is 40mm, and outer ring radius is 70mm.The thickness of steel washer 10
Degree is preferably 16mm.
The utility model additionally provides a kind of impermeability test method for concrete of elimination of level circumferential pressure, including walks as follows
It is rapid:
S1: test solution is injected into the water tank of Anti-leakage instrument, air extra in Anti-leakage instrument is removed；
S2: top fixed setting and the concentric steel washer of punching block 1 at the die cavity center of punching block 1, steel washer 6 is for limiting
Determine the height of test specimen upper surface；
S3: the outer circumference surface sealing material for the test specimen that forming has conserved uniformly is coated and forms sealant, and is packed into steel
Mould 1, then carry out the weighing of Initial total weight T1；
S4: it will be fixedly connected on the test platform of Anti-leakage instrument equipped with steel model 1；
S5: being arranged the water pressure of load, and disposable pressurization reaches setting pressure, opens the valve of corresponding test specimen, is resisted
Seep test；
S6: after a period of time, the valve of corresponding test specimen is closed, will be removed equipped with steel model 1, and carry out subsequent gross weight
The weighing for measuring T2 calculates total infiltration weight T3 by T2-T1 and records；
S7: test specimen is removed into punching block 1, and splits test specimen with pressure testing machine and forms section, measurement infiltration height simultaneously records.
In S2, height of the steel washer 6 in the die cavity of punching block 1 is adjustable.
Detailed process is as follows by the S3: taking out the test specimen shaped from fog room in the previous day of test, and will
It is heated to 35 DEG C~45 DEG C with punching block 1 together, meanwhile, the sealing material of sealing is heated to melt completely to form sealing molten
Liquid, then by test specimen periphery, uniform roll forms uniform sealant in sealing solution, and test specimen is then pressed into punching block 1 again
In.
As a preference, the sealing material is paraffin, become liquid after heating paraffin dissolution, is frozen at room temperature solid
Body, good seal performance, in addition solid paraffin is very stable, it is very difficult to and other materials react；Sealing material can certainly
Using the mixture or butter of paraffin and rosin and the mixture of absorption resin of sodium polyacrylate.
According in impermeability test to test solution requirement, the test solution be one of water or various salting liquids,
As a preference, using 10% metabisulfite solution.
Verifying analysis:
Under 1.2MP pressure, test specimen made of four same ratio of mud similarity conditions is carried out using existing punching block same
The infiltration of the same duration of one batch is tested, and the infiltration altitudes of four test specimens are as shown in Figures 3 to 6, under the same pressure,
Moisture penetration height is irregular.Under same infiltration duration, substantially all it is distributed at U-typed.Wherein test specimen shown in fig. 6 can be very
, it is evident that central part is almost without infiltration.Test specimen central part infiltration height shown in fig. 5 also only reaches 1.5~2cm.
Find that the shape of its height that seeps water is related with the height that test specimen is jacked during impervious in multiple examination, with high by jacking
The infiltration height of the increase of degree, test block reduces, and it is aobvious that utility model is got in the U-shaped distribution for the curve that seeps water.
Under 3.6MP pressure, test specimen made of two same ratio of mud similarity conditions is carried out using existing punching block same
The infiltration of the same duration of one batch is tested, as shown in Figure of description Fig. 7 and Fig. 8, when the lifting height of test block reaches 2cm or more
When, there is the phenomenon that delamination failure in prominent punching block, test specimen for test block upper surface.
It is soft by means of ANSYS finite element analysis for loading process of the simulating test pieces in the uphill process that hydraulic pressure acts on
Part can establish contact squeeze model as shown in figure 11: wherein punching block lower boundary is fixed boundary, is set between test block and punching block
Surface-to-surface contact is set, test block bottom surface applies water pressure.Main models parameter is as shown in table 1:
The existing punching block finite element analysis fitting parameter of table 1
It is as follows that result is obtained by numerical simulation:
As shown in Figure of description Figure 12, concrete test block generates biggish level under the action of horizontal circumferential pressure
Direction compression, the compression is gradually increased from concrete test block top to lower part as can be seen from Figure 12, the level of lowest part
Compression can achieve 20Mpa or more, and the distribution of the lower part compression in concrete test block also shows periphery broad in the middle
Small distribution of the compressive stress rule, this is corresponding with the height regularity of distribution that seeps water in Fig. 3 to Fig. 6, due to concrete test block middle and lower part
Concrete it is internal under the action of horizontal circumferential pressure there are biggish horizontal compression, and horizontal compression tries concrete
Hole, hole and microcrack compression compact inside block, hinder the infiltration of water or solution to top；And the edge water of test block
Concora crush stress is relatively small, so infiltration height is larger, therefore obtained infiltration altitude curve is U-typed distribution.
Fig. 9 gives the infiltration situation using existing punching block to the vertical section after a specimen test, it is seen that in Fig. 9
Infiltration is seriously affected due to by circumferential pressure in the middle part of test specimen to be normally carried out.And use the experimental rig of the utility model
Afterwards, water pressure straight up no longer balances the vertical component of the pressure at right angle of concrete test block by punching block, but directly
Or major part is balanced by the limiting device on top, it is thus eliminated that the horizontal circumferential pressure of inside concrete, inside concrete
It is no longer influenced by the compression of horizontal direction, vertical hole, gap and the microcrack of concrete keep original size to be no longer influenced by
Compress it is compacted, so the substantially horizontal line of infiltration altitude curve (as shown in Figure 10) obtained at this time, and the seepage velocity of water
Also more original impervious device has great raising.
It can be seen that presence of traditional anti-leakage detector for water due to horizontal circumferential pressure, leads to measured concrete
Anti-permeability performance is obviously higher, by the investigation of utility model people it has also been found that few in concrete impervious detection impervious be unsatisfactory for
The phenomenon that occur, and the seepage problem of underground concrete structure can be found everywhere in Practical Project, this and traditional impermeability test
The inherent shortcoming of device has direct relationship.And pass through the utility model, after the influence for eliminating horizontal circumferential pressure, ability
The actual impermeability of obtained concrete eliminates the hidden danger to seep water in engineering.
Claims (3)
1. a kind of concrete impermeability test device of elimination of level circumferential pressure, including punching block (1), punching block (1) has and test specimen
Inner cavity with identical taper, which is characterized in that further include limit adjusting mechanism (3)；The upper section of punching block (1) lateral wall is
Straight wall section, and external thread section (2) are equipped in straight wall section；
The limit adjusting mechanism (3) includes rotation steel bushing (4), connecting rod (5) and steel washer (6), rotation steel bushing (4) packet
It includes upper plate (7) and encloses and set on upper plate (7) excircle and the cylindric coaming plate (8) that extends downwardly, the inner wall of coaming plate (8)
There is the internal thread segment (9) with external thread section (2) cooperation；
Steel washer (6) coaxial arrangement is internal in punching block (1), fixes multiple connecting rods (5) on steel washer (6), multiple connecting rods (5)
The annular equidistant placement centered on punching block (1) axle center；The other end of connecting rod (5) is fixedly connected on the lower end surface of upper plate (7)
On.
2. a kind of concrete impermeability test device of elimination of level circumferential pressure according to claim 1, which is characterized in that
Upper plate (7) center opens up through-hole (10).
3. a kind of concrete impermeability test device of elimination of level circumferential pressure according to claim 1 or 2, feature exist
In the connecting rod (5) is equipped with 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821783117.1U CN209069796U (en) | 2018-10-31 | 2018-10-31 | The concrete impermeability test device of elimination of level circumferential pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821783117.1U CN209069796U (en) | 2018-10-31 | 2018-10-31 | The concrete impermeability test device of elimination of level circumferential pressure |
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| Publication Number | Publication Date |
|---|---|
| CN209069796U true CN209069796U (en) | 2019-07-05 |
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ID=67097117
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| CN201821783117.1U Expired - Fee Related CN209069796U (en) | 2018-10-31 | 2018-10-31 | The concrete impermeability test device of elimination of level circumferential pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283113A (en) * | 2018-10-31 | 2019-01-29 | 中国矿业大学 | A kind of the concrete impermeability test device and test method of elimination of level circumferential pressure |
-
2018
- 2018-10-31 CN CN201821783117.1U patent/CN209069796U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283113A (en) * | 2018-10-31 | 2019-01-29 | 中国矿业大学 | A kind of the concrete impermeability test device and test method of elimination of level circumferential pressure |
| CN109283113B (en) * | 2018-10-31 | 2023-12-29 | 中国矿业大学 | Concrete impermeability test device and test method for eliminating horizontal hoop pressure |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20190705 Termination date: 20201031 |