CN104458531A - Device and method for testing water permeability resistance of lateral restriction-free concrete joint - Google Patents
Device and method for testing water permeability resistance of lateral restriction-free concrete joint Download PDFInfo
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- CN104458531A CN104458531A CN201410728387.2A CN201410728387A CN104458531A CN 104458531 A CN104458531 A CN 104458531A CN 201410728387 A CN201410728387 A CN 201410728387A CN 104458531 A CN104458531 A CN 104458531A
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Abstract
The invention discloses a device and a method for testing the water permeability resistance of a lateral restriction-free concrete joint. The device is used for testing the water permeability resistance of a test block at a new-old concrete joint part, and comprises a double-layer square cylinder 4 used for placing a new-old concrete joint anti-permeability test block 5, wherein the bottom of the square cylinder is sealed; an outer flange 14 is arranged at the upper opening of the square cylinder; an inner flange 9 with an intermediate opening 10 is arranged at the lower part of the square cylinder; the square cylinder is separated into two parts, namely a test block compartment 6 and a water inlet compartment 13 by virtue of the inner flange; an elastic sealing gasket 8 is arranged on the inner flange; a left cover plate 1 and a right cover plate 2 are fixedly pressed on the outer flange of the square cylinder by virtue of fastening bolts 3; the water inlet compartment in the lower part of the square cylinder is connected with a water pressure device 11 and inlet water and is also connected with a water pressure gauge 12; and a viewing opening through which the water seepage condition is conveniently observed is formed between the left cover plate and the right cover plate according to the shape and the area of the concrete joint. According to the device and the method disclosed by the invention, the water permeability resistance of the new-old concrete joint part can be realized under the lateral restriction-free action.
Description
Technical field
The present invention relates to and a kind ofly there is test unit that is new, old concrete structure seam areas water resistant permeance property to causing owing to building interval.
Background technology
In architecture industry, there is the position of causing in xoncrete structure owing to building interval time and there is seam, as the concrete joint of basement and post-cast strip, the Metro Station Structure of the superimposed wall construction pattern of employing, the joint area of assembled underground structure, the concrete joint stubble position of underpass, the later stage of Other Engineering structure repair position etc.When these engineering structures are positioned at below phreatic line, in operation operational phase these seam areas seepage position of comparatively concentrating often, use the structure in later stage, concrete permanance etc. causes considerable influence, also can cause certain loss, engineering time serious, even can be caused to scrap.
Be difficult to ensure waterproof effect completely because the construction quality of water barrier in current underground works is subject to more multifactorial impact, therefore also some waterproof measures are proposed successively for improving of these new-old concrete seam areas anti-permeability performances, as patent 1 (publication number CN2801916Y, publication date 2006.08.02), patent 2 (publication number CN201908363U, publication date 2011.07.27), patent 3 (publication number CN202787526U, publication date 2013.03.13), patent 4 (publication number CN201110154743, publication date 2011.11.23) etc., by increasing the water proof structure pattern of seam, improve new-old concrete adhesive property, change the methods such as the shape of seam areas to strengthen its anti-permeability performance.But, at present for the test of concrete impermeability, mainly according to " GB/T50082-2009 Standard for test methods of longterm performance and durability of ordinary concrete standard " (implementation date: on July 1st, 2010,6th chapter water resistant permeability test) the round table-like concrete test block (up-small and down-big) that adopts disposable integral to build tests its anti-permeability performance, do not relate to anti-permeability performance test method and the device of new-old concrete seam areas, cannot test to the effect of the waterproof measure at this kind of position.Some other disclosed document, as patent 5 (publication number CN102608014A, publication date 2012.07.25), patent 6 (publication number CN101806702B, publication date 2011.04.27), patent 6 (publication number CN201120371533, publication date 2012.05.23) etc., also be detect for the overall anti-permeability performance of concrete test block, do not relate to the impervious detection at the xoncrete structure position that there is seam.
Document disclosed in the people such as Xu Hongfa (" research of concrete joint impermeability test method ", " Sichuan University's journal (engineering science version) ", 42nd volume the 4th phase, 7-12 page, in July, 2010), propose a kind of utilize existing concrete anti-leakage detector for water improve after concrete joint impermeability test method.In the method, the impervious test block of concrete joint of circular platform type adopts the mode of building for 2 times to make, concrete joint form considers trapezoidal and arc two kinds, uses conventional concrete impervious instrument (as described in " GB/T50082-2009 Standard for test methods of longterm performance and durability of ordinary concrete standard ") to add water from the bottom of concrete test block afterwards and compresses into row impermeability test.Adopting the subject matter existed in this way is: to be ejected by hydraulic pressure for preventing concrete test block and come off, steel bushing on concrete impervious instrument is circular platform type (up-small and down-big), therefore in the concrete impervious test block of installation and add from bottom Hydraulic Process and can make to form a hoop effect of contraction between concrete impervious test block and steel bushing, increase the extruding force between new, old concrete, cause seam in various degree closed, and the impermeability of seam areas under actual working state can not be reflected.
Summary of the invention
The object of this invention is to provide a kind of test unit xoncrete structure seam areas being carried out to water resistant permeance property, eliminate the hoop effect of contraction of concrete impervious instrument steel bushing to concrete test block, can test the water resistant permeance property of new-old concrete seam areas under closer to the condition of actual working environment, design and construction for such engineering structure provides foundation more accurately, reduces the seepage of appearance operation stage in later stage.
For realizing goal of the invention, the technical solution used in the present invention is:
Without a test unit for lateral restriction concrete joint water resistant permeance property, for carrying out the test of water resistant permeance property to the test block of new-old concrete seam areas.There is the double-deck square tube 4 for placing the impervious test block of new-old concrete seam 5, the sealed bottom of square tube, the suitable for reading of square tube has outward flange 14, and square tube bottom is provided with the inward flange 9 with middle opening 10, and square tube is divided into test block cabin 6 and water inlet cabin 13 two parts by inward flange; Inward flange 9 is provided with resilient seal packing ring 8; Left cover 1 and right cover plate 2 are pressed abd fixed on the outward flange of square tube by fastening bolt 3; The water inlet cabin 13 of square tube bottom connects hydraulic devices 11 and water inlet, and connects water pressure gauge 12; Be provided with the observation panel being convenient to observe infiltration situation according to the shape of concrete joint and region between left cover and right cover plate.
Another object of the present invention is to provide a kind of test method without lateral restriction concrete joint water resistant permeance property, its concrete means are: the test unit adopting said structure, having in the two-part double-deck square tube in test block cabin 6 and water inlet cabin 13 the impervious test block 5 formed of installing by novel concrete and old concrete, hydraulic pressure is applied to new-old concrete seam 7; Inside dimensions and the concrete impervious test block of square tube adapt, with the impact of the lateral restriction of concrete test block surrounding in Elimination test process; Concrete impervious test block is fixed through fastening bolt 3 by top left cover plate 1 and right cover plate 2, and makes the resilient seal packing ring 8 bottom concrete impervious test block to form in crimp sealing restriction water inlet cabin 13 press water by the pressuring action of left cover and right cover plate to flow out from side bottom test block; The press water in water inlet cabin 13 is pressed into impervious test block seam areas 7 in test block cabin by middle opening 10; The water inlet cabin place of square tube bottom connects hydraulic devices 11 and water inlet, and connects water pressure gauge; Experimenter observes infiltration situation by the observation panel on cover plate, stops test when infiltration appears in seam areas at top, the maximum hydraulic pressure value in record process of the test.
During specific experiment, by impervious for new-old concrete test block, (general size is 15cm × 15cm × 15cm, but be not limited thereto) be positioned over one with it size adapt in the double-deck square tube upper space of (slightly larger than test block size), inside square tube upper strata, prior brushing lubricant is to eliminate the constraint of side to test block; Cover plate is divided into two pieces, left and right, all uses fastening bolt and square tube top outer rim compact siro spinning technology with fixing test block; Two cover plates stitching portion reserves a fixed gap and opening along concrete joint position, for observing permeability test result; Square tube lower floor is water inlet cabin, connects hydraulic pressure feedway and water pressure gauge; Open square orifice between the levels of square tube, make to act on concrete joint position into the water in water cabin by this position; For anti-sealing oozes out from test block side, one deck certain thickness silicone rubber kinds resilient seal packing ring (between size with the inner levels of square tube, inward flange shape conforms to) is set with square tube contact site bottom concrete impervious test block, by the fastening effect of top cover, concrete test block tight compression packing washer is formed and close water ring, ensure that infiltration site of action at concrete seam and does not flow out from side bottom test block.
When the multiple concrete impervious test block of needs is tested simultaneously, can be in parallel by multiple same apparatus, adopt identical hydraulic pressure feedway to supply water, to keep same hydraulic pressure and action time.This scheme is applicable to new-old concrete seam crossing without the water resistant permeance property test under lateral restriction condition.
At square tube both sides or surrounding side-wall hole, square tube 4 sidewall can be reduced or eliminated to the lateral restriction of concrete impervious test block.
The invention has the beneficial effects as follows, when carrying out water resistant permeability test to new-old concrete seam areas, the hoop effect of contraction of concrete impervious instrument steel bushing can be eliminated, realize testing without the anti-permeability performance of External Force Acting when seam areas.
Note: the present invention is subject to the subsidy of state natural sciences fund youth fund project (bullets 51108385), state natural sciences fund general project (bullets 51178401), expresses thanks at this.
Accompanying drawing explanation
Fig. 1 is the front view of the present invention without the test unit of lateral restriction concrete joint water resistant permeance property.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the A-A sectional drawing of this Fig. 1.
In figure: 1. left cover, 2. right cover plate, 3. fastening bolt, 4. square tube, the 5. impervious test block of new-old concrete, 6. test block cabin, 7. new-old concrete seam, 8. resilient seal packing ring, 9. inward flange, 10. inward flange middle opening, 11. water inlets and hydraulic devices, 12. water pressure gauges, 13. water inlet cabins, 14. outward flanges.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention is further described.
Embodiment
As shown in Figure 1-Figure 3, a kind of embodiment of the present invention is, can realize new-old concrete seam without the water resistant permeance property test under lateral restriction state, implementation step is as follows:
(1) in concrete cube die trial, make half concrete test block and simulate old pouring concrete, after the demoulding, its surface 7 is processed, afterwards maintenance 28d;
(2) old concrete test block is loaded concrete cube die trial, upward, top casting concrete simulation newly-laid concrete, forms the impervious test block 5 of complete concrete joint, maintenance 28d after the demoulding at new-old concrete seam interface 7;
(3) test unit described in technical solution of the present invention is connected hydraulic devices 11 and water pressure gauge 12, and install resilient seal packing ring 8, in water inlet cabin, bottom 13, fill water;
(4) impervious for concrete joint test block is loaded in square tube 4 (square tube 4 inwall brushing lubricant), cover left cover 1 and right cover plate 2 and tighten fastening bolt 3;
(5) applied to permeate hydraulic pressure by hydraulic devices 11, the water resistant permeance property of test concrete seam, stop test when infiltration appears in seam areas at top, the maximum hydraulic pressure value in record process of the test.
Adopt the experiment equipment and progress of this example, to concrete joint interface 7 take wire brush process laitance, surperficial dabbing and clean, dabbing the process of three kinds of modes such as painted concrete interfacial agents, the test findings of the impervious test block of all kinds of concrete joint is as shown in the table.
| Sequence number | Seam interface processing mode | Infiltration hydraulic pressure/MPa |
| 1 | Wire brush process laitance | 0.20 |
| 2 | Surface dabbing is also cleaned | 0.30 |
| 3 | Surface dabbing brushing interfacial agents | 0.50 |
Known from the test result table, the processing mode at new-old concrete interface 7 is different, its impermeability has certain difference, distinguishes under adopting technical solution of the present invention can test out different interface processing mode without the impermeability of lateral restriction new-old concrete seam crossing.
Claims (6)
1. the test unit without side direction additional constraining force concrete joint water resistant permeance property, for carrying out the test of water resistant permeance property to the test block of new-old concrete seam areas, it is characterized in that, there is the double-deck square tube (4) for placing the impervious test block of new-old concrete seam (5), the sealed bottom of square tube, the suitable for reading of square tube has outward flange (14), square tube bottom is provided with the inward flange (9) with middle opening (10), and square tube is divided into test block cabin (6) and water inlet cabin (13) two parts by inward flange; Inward flange is provided with resilient seal packing ring (8); Left cover (1) and right cover plate (2) are pressed abd fixed on the outward flange of square tube by fastening bolt (3); The water inlet cabin (13) of square tube bottom connects hydraulic devices (11) and water inlet, and connects water pressure gauge (12); Be provided with the observation panel being convenient to observe infiltration situation according to the shape of concrete joint and region between left cover (1) and right cover plate (2).
2. the test unit without lateral restriction concrete joint water resistant permeance property according to claim 1, it is characterized in that, left cover (1) and right cover plate (2) form a monoblock type cover plate, and it offers viewport according to the shape of concrete joint and region correspondence.
3. the test unit without lateral restriction concrete joint water resistant permeance property according to claim 1, it is characterized in that, square tube both sides or surrounding side-wall hole, reduce or eliminate square tube (4) sidewall to the lateral restriction of concrete impervious test block.
4. the test method without lateral restriction concrete joint water resistant permeance property, it is characterized in that, adopt the test unit of claim 1 or 2 or 3 structure, having in test block cabin (6) and water inlet cabin (13) two-part double-deck square tube the impervious test block (5) formed of installing by novel concrete and old concrete, hydraulic pressure is applied to new-old concrete seam (7); Inside dimensions and the concrete impervious test block of square tube (4) adapt, with square tube sidewall in Elimination test process on the impact of the lateral restriction of concrete test block surrounding; Concrete impervious test block is fixed through fastening bolt (3) by top left cover plate (1) and right cover plate (2), and makes the resilient seal packing ring (8) bottom concrete impervious test block to form in crimp sealing restriction water inlet cabin press water by the pressuring action of left cover and right cover plate to flow out from side bottom test block; The press water in water inlet cabin is pressed into impervious test block seam (7) position in test block cabin by middle opening (10); The water inlet cabin place of square tube bottom connects hydraulic devices and water inlet, and connects water pressure gauge; Experimenter observes infiltration situation by the observation panel on cover plate, stops test when infiltration appears in seam areas at top, the maximum hydraulic pressure value in record process of the test.
5. test method according to claim 4, is characterized in that, adopts mode in parallel to be connected by multiple single test device, provides identical hydraulic pressure, carry out water resistant permeability test simultaneously.
6. test method according to claim 4, is characterized in that, fluid under pressure can be water, also can be the solution of other compositions.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181554A (en) * | 2015-09-18 | 2015-12-23 | 中国矿业大学(北京) | Waterproof test method for horizontal joint applying grouting layer |
| CN105738267A (en) * | 2016-03-04 | 2016-07-06 | 南京德阳科技有限公司 | Test block side surface sealing device for concrete anti-permeation instrument |
| CN105806764A (en) * | 2016-03-25 | 2016-07-27 | 河海大学 | Device and method for testing permeability anisotropy of large-porosity bituminous mixture |
| CN107796745A (en) * | 2017-11-24 | 2018-03-13 | 招商局重庆交通科研设计院有限公司 | A kind of tunnel-liner infiltration hydraulic pressure water determination experiment device and method |
| 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 |
| CN109765354A (en) * | 2018-12-14 | 2019-05-17 | 重庆市排水有限公司 | A kind of pond body crack repairing test pond |
| CN110514586A (en) * | 2019-09-10 | 2019-11-29 | 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 piece water-stop glue water resistant compression testing device and test method |
| CN113008761A (en) * | 2021-04-27 | 2021-06-22 | 东南大学 | Self-repairing concrete water-resistant permeability detection device |
| CN116735457A (en) * | 2023-08-16 | 2023-09-12 | 中国建筑第五工程局有限公司 | Concrete performance detection equipment |
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Cited By (14)
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| CN105181554A (en) * | 2015-09-18 | 2015-12-23 | 中国矿业大学(北京) | Waterproof test method for horizontal joint applying grouting layer |
| CN105738267A (en) * | 2016-03-04 | 2016-07-06 | 南京德阳科技有限公司 | Test block side surface sealing device for concrete anti-permeation instrument |
| CN105806764A (en) * | 2016-03-25 | 2016-07-27 | 河海大学 | Device and method for testing permeability anisotropy of large-porosity bituminous mixture |
| CN107796745B (en) * | 2017-11-24 | 2023-12-08 | 招商局重庆交通科研设计院有限公司 | Tunnel lining seepage water pressure and water volume measurement experiment device and method |
| CN107796745A (en) * | 2017-11-24 | 2018-03-13 | 招商局重庆交通科研设计院有限公司 | A kind of tunnel-liner infiltration hydraulic pressure water determination experiment device and method |
| 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 |
| CN109765354A (en) * | 2018-12-14 | 2019-05-17 | 重庆市排水有限公司 | A kind of pond body crack repairing test pond |
| CN109765354B (en) * | 2018-12-14 | 2023-12-22 | 重庆市排水有限公司 | Cell body crack repair test pool |
| CN110514586A (en) * | 2019-09-10 | 2019-11-29 | 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 piece water-stop glue water resistant compression testing device and test method |
| CN110514586B (en) * | 2019-09-10 | 2024-05-28 | 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） | Device and method for testing water pressure resistance of water stop glue of splice joint |
| CN113008761A (en) * | 2021-04-27 | 2021-06-22 | 东南大学 | Self-repairing concrete water-resistant permeability detection device |
| CN116735457B (en) * | 2023-08-16 | 2023-10-13 | 中国建筑第五工程局有限公司 | Concrete performance detection equipment |
| CN116735457A (en) * | 2023-08-16 | 2023-09-12 | 中国建筑第五工程局有限公司 | Concrete performance detection equipment |
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