CN104458532B - Device and method for testing water permeability resistance of concrete joint under action of controllable lateral restriction - Google Patents
Device and method for testing water permeability resistance of concrete joint under action of controllable lateral restriction Download PDFInfo
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Abstract
A device and method for testing water permeability resistance of a concrete joint under the action of controllable lateral restriction are disclosed. The device comprises a double-layer square cylinder used for placing a new-old concrete impervious test block, wherein the bottom of the square cylinder is sealed; an outer flange is formed in an upper opening of the square cylinder; an inner flange with a middle opening is formed in the lower part of the square cylinder; the square cylinder is separated into two parts, namely a test block compartment and a water inlet compartment by virtue of the inner flange; a force adjustment hole which is used for conveniently adjusting and clamping the new-old concrete impervious test block and transversely penetrates through double-thread screws on two sides of the test block compartment is formed in the test block compartment; the concrete impervious test block is pressed by a left cover plate and a right cover plate on the top and cover plate fastening bolts; an elastic sealing gasket is arranged on the inner flange; and the left cover plate and the right cover plate are fixedly pressed on the outer flange of the square cylinder by virtue of the fastening bolts. According to the device and the method disclosed by the invention, the water permeability resistance of the new-old concrete joint part under the action of controllable lateral restriction can be tested.
Description
Technical field
The present invention relates to one kind due to building interval to causing to there is new, old concrete structure seam areas water resistant infiltration
The assay device of performance.
Background technology
In architecture industry, the position for causing the presence of seam in xoncrete structure due to building interval time is there is,
Such as the concrete joint and post-cast strip, Metro Station Structure, the assembled underground structure of employing overlapping wall construction pattern of basement
Joint area, the concrete of underpass connects a batch position, the later stage of Other Engineering structure repairs position etc..When these engineering knots
It is often the position that seepage is more concentrated in operation operational phase these seam areas when below structure waterline located underground, it is right
The structure in later stage causes considerable influence using, durability of concrete etc., will also result in certain loss, even meeting when serious
Engineering is caused to scrap.
It is difficult to ensure that completely because the construction quality of waterproof layer in current underground engineering is subject to more multifactorial impact
Waterproof effect, thus for these new-old concrete seam areas anti-permeability performances improve also propose successively some prevent
Water measure, such as patent 1 (publication number CN2801916Y, publication date 2006.08.02), patent 2 (publication number CN201908363U, public affairs
Open a day 2011.07.27), patent 3 (publication number CN202787526U, publication date 2013.03.13), (publication number of patent 4
CN201110154743, publication date 2011.11.23) etc., by increasing the water proof structure pattern of seam, improving new-old concrete
The methods such as adhesive property, the shape of change seam areas are strengthened its anti-permeability performance.But, at present for concrete impervious
The test of performance, mainly foundation《GB/T50082-2009 Standard for test methods of longterm performance and durability of ordinary concrete standards》
(implementation date：On July 1st, 2010, the 6th chapter water resistant permeability test) using the round table-like concrete test block of disposable one-piece casting
(up-small and down-big) is tested its anti-permeability performance, be not directed to new-old concrete seam areas anti-permeability performance test method and
Device, it is impossible to which the effect of the waterproof measure at this kind of position is tested.Some other disclosed document, the such as (publication number of patent 5
CN102608014A, publication date 2012.07.25), patent 6 (publication number CN101806702B, publication date 2011.04.27), specially
Sharp 6 (publication number CN201120371533, publication date 2012.05.23) etc., are also the overall anti-permeability performance for concrete test block
Detected, be not directed to the impervious detection that there is the xoncrete structure position of seam.
Document disclosed in Xu Hongfa et al. (《Concrete joint impermeability test method is studied》,《Sichuan University's journal (engineering
Science version)》, the 4th phase of volume 42, the 7-12 page, in July, 2010), it is proposed that one kind utilizes existing concrete anti-leakage detector for water
Concrete joint impermeability test method after improvement.In the method, the impervious test block of the concrete joint of circular platform type is poured using 2 times
The mode built makes, and the joint form of concrete considers trapezoidal and two kinds of arc, with conventional concrete impervious instrument (such as afterwards
《GB/T50082-2009 Standard for test methods of longterm performance and durability of ordinary concrete standards》It is described) from the bottom of concrete test block
Portion's pressure that adds water carries out impermeability test.The subject matter for existing in this way is：To prevent concrete test block from being ejected by hydraulic pressure
Come off, the 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 the bottom of from
Portion adds and can cause in Hydraulic Process one hoop effect of contraction of formation between concrete impervious test block and steel bushing, increases new, old
Extruding force and the extruding force between concrete can not directly control (main to be affected by loading hydraulic pressure), cause seam different
The closure of degree, and impermeability of the seam areas under actual working state can not be reflected；And work as connecing for some engineering structures
(as prefabricated construction joint area may adopt screwed joint reinforcing, post-cast strip position when there is pre-applied force in seam position
Place concrete often have expansive force to act on), the test method cannot effectively or control impermeability test during seam areas it is pre-
Plus force value, cannot also reflect the actual working state of structure.
Observation in practice of construction and research shows, carries out to concrete joint water resistant under the effect of controllable lateral restriction
The test of permeance property has strong necessity, for example, in some underground structures, such as basement, underpass, subway
Stand, immersed tube tunnel etc., be to reduce the cracking risk that xoncrete structure self-constriction and differential settlement cause, need to set in the structure
Put post-cast strip or expansion reinforcing band.As record it is big it is strong disclosed in document (Basement Concrete Structures expansion reinforcing band substitutes post-cast strip
Construction Technique,《Jiangxi building materials》, the 4th phase in 2012, the 57-58 page), the disclosed document of Zhao Penghui et al. is (after immersed tube
Band expansive concrete construction technology is poured,《Construction technology》, the supplementary issue of volume 43, the 136-138 page, in June, 2014) in the ground that carried
The new-old concrete seam areas such as lower room expansion reinforcing band, immersed tube tunnel post-cast strip, using with certain expansile concrete
Poured, the extruding force produced using expansive concrete goes to compensate crack and the space that the position concrete shrinkage is produced.
The position of such xoncrete structure, because the expansive concrete at post-cast strip position is in the relative feelings for limiting of two lateral boundaries
Condition, the expansive force produced by newly-laid concrete causes the new-old concrete joint face at post-cast strip to be subject to certain squeezing action,
To improve its impervious effect.The impermeability at such position is tested, at present existing concrete impervious instrument cannot be in impervious examination
The extruding force with control action in new-old concrete seam areas is simulated on block, therefore cannot reasonably to the reality at such position
Impermeability is evaluated.
The content of the invention
In view of prior art is not enough above, it is an object of the invention to provide one kind is right under the effect of controllable lateral restriction
Xoncrete structure seam areas carry out the assay device of water resistant permeance property, eliminate concrete impervious instrument steel bushing and concrete is tried
The hoop effect of contraction of block, it is also possible to the pre-add lateral restriction of adjustment and control new-old concrete seam areas, can more connect
The water resistant permeance property of new-old concrete seam areas is tested under conditions of nearly actual working environment, is such engineering knot
The design and construction of structure provides more accurate foundation, reduces the seepage of operation stage in later stage appearance.
To realize goal of the invention, the technical solution used in the present invention is：
The assay device of concrete joint water resistant permeance property under a kind of controllable lateral restriction effect, for new and old mixed
The seam areas test block of solidifying soil carries out water resistant permeance property test.With for placing the double-deck square tube of the impervious test block of new-old concrete 5
4, the sealed bottom of square tube, square tube it is suitable for reading with outward flange 14, square tube bottom is provided with the inward flange with middle opening 10
9, square tube 4 is divided into test block cabin 6 and the two parts of enter water tank 13 by inward flange 9；Test block cabin is provided with to be easy to adjust and clamps new and old mixing
Coagulate native impervious test block 5 and cross the force adjustment hole 16 of the double threaded screw 15 of test block cabin both sides；Concrete impervious test block is by top left cover
Plate 1 and right cover plate 2 and cover plate fastening bolt 3 are fixed；Elastic packing packing ring 8 is provided with inward flange 9；Left cover 1 and 2 by
Fastening bolt 3 is pressed abd fixed on the outward flange of square tube 4；The connection water inlet of enter water tank 13 of the bottom of square tube 4 and hydraulic devices 11,
And connect water pressure gauge 12；It is provided with and is easy to observation to ooze according to the shape of concrete joint and region between left cover 1 and right cover plate 2
The observation panel of regimen condition.
It is a further object of the present invention to provide concrete joint water resistant permeance property under a kind of controllable additional restraining forceies effect
Test method, its specific means is：Using the experimental provision of said structure, with test block cabin 6 and the two parts of enter water tank 13
Double-deck square tube in install the new-old concrete being made up of novel concrete and old concrete clamped by double threaded screw 15 impervious
Test block 5, to new-old concrete seam interface 7 hydraulic pressure is applied；The inside dimensions of square tube are adapted with concrete impervious test block, to disappear
Except impact of the square tube side wall to the lateral restriction of concrete test block surrounding in process of the test；In the side of vertical concrete joint face
To the centre of the impervious test block 5 of the new-old concrete being made up of novel concrete and old concrete is reserved to be easy to by double end spiral shell
The via of bar 15；Concrete impervious test block is fixed by top left cover 1 and the Jing fastening bolts 3 of right cover plate 2, by double end spiral shell
Bar 15 adjusts the controllable pre-applied force at the new-old concrete seam interface 7 of the impervious test block 5 of new-old concrete, and by the He of left cover 1
The pressuring action of right cover plate 2 cause concrete impervious test block bottom elastic packing packing ring 8 formed crimp sealing limit into
Press water flows out from test block bottom side in water tank 13；The press water of enter water tank 13 is pressed into impervious in test block cabin by middle opening 10
Test block seam areas；Connect water inlet and hydraulic devices 11 at the enter water tank 13 of the bottom of square tube 4, and connect water pressure gauge 12；Experiment
Person observes infiltration situation by the observation panel on cover plate, when seam areas stop test, record test when seeping water occurs in top
During maximum hydraulic pressure value.
During specific experiment, by the impervious test block of new-old concrete, (general size is 15cm × 15cm × 15cm, but is not limited to
This) it is positioned in a double-deck square tube upper space that therewith size is adapted (be slightly larger than test block size), square tube upper strata inner side
In advance brushing lubricant to be to eliminate constraint of the side to test block, at concrete impervious test block center prefabricated hole, in square groove side
The hole for being easily installed double threaded screw is opened on wall, has been applied to concrete impervious test block by the way of insertion double threaded screw fastening
The external force in vertical joint face is realizing acting on the controllable pre-applied force effect at concrete joint position.Cover plate is divided into two pieces of left and right,
Closely it is connected to fix test block with square tube top outer rim with fastening bolt.In the direction of vertical concrete joint face, by newly mixing
Reserve the via being easy to by double threaded screw in the centre of the test block that solidifying soil and old concrete are constituted.During installation, new, old coagulation
The hole reserved in soil point-blank aligns；Double threaded screw through the hole inside concrete test block, two install pad,
Nut clamps concrete test block；Realize adjusting and controlling concrete impervious test block seam upside by modes such as torque wrenches
To the size of effect of contraction power.Two cover plates stitching portion reserves a fixed gap and opening along concrete joint position, is used for
Observation permeability test result；Square tube lower floor is enter water tank, connection hydraulic pressure feedway and water pressure gauge；Open between the levels of square tube
Square orifice, makes the water in enter water tank act on concrete joint position by this position；To prevent water from test block bottom side stream
Go out, one layer of certain thickness silicone rubber kinds elastic packing packing ring is set in concrete impervious test block bottom and square tube contact site
(inward flange shape is consistent between size and square tube inside levels), cause concrete test block tight by the fastening effect of top cover
Compression seal packing ring is formed and closes water ring, it is ensured that infiltration site of action flows out in concrete seam and not from test block bottom side.
The controllable pre-add lateral restriction of the new-old concrete seam of test block is adjusted by double threaded screw.
When needing multiple concrete impervious test blocks to be tested simultaneously, can be in parallel by multiple same apparatus, using identical
Hydraulic pressure feedway supply water, with the hydraulic pressure that maintains like and action time.
The water resistant of the lower new-old concrete seam areas of controllable lateral restriction effect can be conveniently implemented in using the present invention
Permeance property is detected.
Description of the drawings
Fig. 1 is the top view (figure of the assay device of controllable lateral restriction concrete joint water resistant permeance property of the invention
In be not drawn into the nut and pad at double threaded screw and two).
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the A-A sectional drawings of Fig. 2.
In figure：1. left cover, 2. right cover plate, 3. fastening bolt, 4. square tube, the impervious test block of 5 new-old concretes, 6. test block
Cabin, 7. new-old concrete seam interface, 8. elastic packing packing ring, 9. inward flange, 10. middle opening, 11. water inlets and hydraulic pressure are filled
Put, 12. water pressure gauges, 13. enter water tanks, 14. outward flanges, 15. double threaded screws, 16. force adjustment holes.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further described.
Embodiment
As shown in Figure 1-Figure 3, specific embodiment of the invention is, using apparatus of the present invention and method, in new and old coagulation
The prefabricated hole in the impervious test block center of soil, on the wall of square tube side hole is opened, by the way of insertion double threaded screw fastening to new
The impervious test block of old concrete applies the lateral restriction in vertical joint face to realize acting on the controllable side at concrete joint position
To restraining forceies effect, implementation step is as follows：
(1) make the impervious test block 5 of new-old concrete and new-old concrete seam interface 7 is processed, pour test block and mix
At its center a pvc pipe (external diameter of the external diameter slightly larger than double threaded screw 15) is inserted at position during solidifying soil, treats that concrete reaches
Extract pvc pipe during to demoulding strength out, a reserved straight hole is formed, through the impervious test block of new-old concrete；
(2) assay device described in technical solution of the present invention is connected into water inlet and hydraulic devices 11 and water pressure gauge 12,
And elastic packing packing ring 8 is installed, fill water in bottom enter water tank 13；
(3) in the assay device square tube 4 that the impervious test block of concrete joint is fitted into described in technical solution of the present invention (in square tube
Wall brushing lubricant), the via in concrete test block central authorities is alignd with the force adjustment hole 16 of square tube side wall, and double threaded screw 15 is inserted
Enter the hole in concrete test block central authorities；
(4) left cover 1, right cover plate 2 are covered and cover plate fastening bolt 3 is tightened；
(5) double threaded screw 15 is tentatively tightened, the nut of double threaded screw 15 is subsequently tightened with torque wrench, it is certain to apply
Pre-add lateral restriction；
(6) applied to permeate hydraulic pressure by water inlet and hydraulic devices 11, test the water resistant permeance property of concrete seam, when
Seam areas stop test when seeping water occurs in top, and record the maximum hydraulic pressure value in process of the test.
Using the experiment equipment and progress of this example, surface dabbing is taken to new-old concrete seam interface 7 and is brushed mixed
Solidifying Soil Interface agent is processed, and different pre-applied force sidewise restraint concrete joint interfaces is applied with afterwards, under the conditions of different pre-applied forces
The result of the test of the impervious test block of concrete joint is as shown in the table.
| Sequence number | Seam interface processing mode | Pre-add force value (Nm) | Infiltration hydraulic pressure/MPa |
| 1 | Surface dabbing and brushing interfacial agents | 0 | 0.50 |
| 2 | Surface dabbing and brushing interfacial agents | 30 | 0.60 |
| 3 | Surface dabbing and brushing interfacial agents | 60 | 0.65 |
| 4 | Surface dabbing and brushing interfacial agents | 90 | 0.80 |
Knowable to result in table, sidewise restraint is carried out to concrete joint position using different degrees of pre-applied force or measure
Certain impact can be produced to its anti-permeability performance, can be tested out under different side force constraintss by technical solution of the present invention
The impermeability of new-old concrete seam crossing.
Claims (2)
1. a kind of controllable lateral restriction acts on the test method of lower concrete joint water resistant permeance property, it is characterised in that adopt
Use following assay device：With for placing the double-deck square tube (4) of the impervious test block of new-old concrete (5), the sealed bottom of square tube,
Square tube it is suitable for reading with outward flange (14), square tube bottom is provided with the inward flange with middle opening (10) (9), inward flange (9)
Square tube (4) is divided into into test block cabin (6) and enter water tank (13) two parts；Test block cabin is provided with to be easy to adjust clamping new-old concrete
Impervious test block (5) and cross test block cabin both sides double threaded screw (15) force adjustment hole (16)；Concrete impervious test block is by top left
Cover plate (1) and right cover plate (2) and cover plate fastening bolt (3) are fixed；Elastic packing packing ring (8) is provided with inward flange (9)；
Left cover (1) and right cover plate (2) are pressed abd fixed on the outward flange of square tube (4) by fastening bolt (3)；Square tube (4) bottom is entered
Water tank (13) connects water inlet and hydraulic devices (11), and connects water pressure gauge (12)；Root between left cover (1) and right cover plate (2)
According to concrete joint shape and region be provided be easy to observe infiltration situation observation panel；With test block cabin (6) and water inlet
Being made up of novel concrete and old concrete by double threaded screw (15) clamping is installed in the two-part double-deck square tube in cabin (13)
The impervious test block of new-old concrete (5), to new-old concrete seam interface (7) hydraulic pressure is applied；The inside dimensions and concrete of square tube
Impervious test block be adapted, to eliminate process of the test in impact of the square tube side wall to the lateral restriction of concrete test block surrounding；
The direction of vertical concrete joint face, the center of the impervious test block of the new-old concrete (5) being made up of novel concrete and old concrete
The reserved via being easy to by double threaded screw (15) in position；Concrete impervious test block is by top left cover (1) and right cover plate (2) Jing
Fastening bolt (3) is fixed, and by double threaded screw (15) the new-old concrete seam of the impervious test block (5) of new-old concrete is adjusted
The controllable pre-add lateral restriction at interface (7), and the pressuring action by left cover (1) and right cover plate (2) causes agent on crack resistance of concrete
The elastic packing packing ring (8) for oozing test block bottom forms crimp sealing and limits in enter water tank (13) press water from test block bottom side
Flow out on side；The press water of enter water tank (13) is pressed into new-old concrete seam circle of impervious test block in test block cabin by middle opening (10)
Face (7) position；Enter water tank (13) the place connection water inlet of square tube (4) bottom and hydraulic devices (11), and connect water pressure gauge (12)；
Experimenter observes infiltration situation by the observation panel on cover plate, when seam areas stop test, record when seeping water occurs in top
Maximum hydraulic pressure value in process of the test.
2. test method according to claim 1, it is characterised in that by multiple single test devices by the way of parallel connection
Connection, there is provided identical hydraulic pressure, while carrying out water resistant permeability test.
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| CN201410730047.3A CN104458532B (en) | 2014-12-04 | 2014-12-04 | Device and method for testing water permeability resistance of concrete joint under action of controllable lateral restriction |
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| 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 |
| CN108106992B (en) * | 2017-12-19 | 2020-12-08 | 中建材中岩科技有限公司 | Method for testing adhesive property of coating material under pressure water seepage condition |
| CN108872041B (en) * | 2018-04-25 | 2020-10-23 | 广西大学 | Tunnel segment waterproof layer performance testing device and testing method |
| CN111157422B (en) * | 2019-12-30 | 2021-03-30 | 中国地质大学（武汉） | Device capable of quantitatively adjusting rock rough fracture opening and using method thereof |
| CN113959921B (en) * | 2021-09-23 | 2023-09-26 | 宁波市杭州湾大桥发展有限公司 | Device and method for testing impermeability and durability of precast concrete joint |
| CN114354081B (en) * | 2022-01-10 | 2023-12-05 | 镇江市建设工程质量检测中心有限公司 | Concrete slab leakage point detection device and detection method |
| CN117517174A (en) * | 2023-12-29 | 2024-02-06 | 中铁十七局集团第二工程有限公司 | Building concrete water-resistant permeability test device |
| CN117589656B (en) * | 2024-01-18 | 2024-03-19 | 安徽建工三建集团有限公司 | Underground engineering concrete quality inspection device |
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| CN202330232U (en) * | 2011-11-15 | 2012-07-11 | 山东大学 | Device for testing permeability coefficient of pervious concrete |
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| JP3350197B2 (en) * | 1993-12-29 | 2002-11-25 | 大成建設株式会社 | Permeability test equipment and water path exploration method |
| CN201429560Y (en) * | 2009-06-09 | 2010-03-24 | 西南交通大学 | Anti-penetrating quality trial installation simulating waterproof membrane materials under pressures |
| CN204461962U (en) * | 2014-12-04 | 2015-07-08 | 西南交通大学 | The test unit of concrete joint water resistant permeance property under a kind of controlled lateral restriction effect |
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