CN102680398B - Indoor experiment device for testing anti-stripping strength of composite lining materials - Google Patents
Indoor experiment device for testing anti-stripping strength of composite lining materials Download PDFInfo
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- CN102680398B CN102680398B CN201210179023.4A CN201210179023A CN102680398B CN 102680398 B CN102680398 B CN 102680398B CN 201210179023 A CN201210179023 A CN 201210179023A CN 102680398 B CN102680398 B CN 102680398B
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Abstract
The invention discloses an indoor experiment device for testing anti-stripping strength of composite lining materials. The device comprises a test block and a flexible composite lining. A resin binder layer is arranged on one side of the flexible composite lining, an impermeable membrane is arranged on the other side of the flexible composite lining, the resin binder layer of the flexible composite lining is adhered to the upper surface of the test block, a through hole penetrating through the upper surface and the lower surface of the test block is arranged on the test block, a thread water nozzle is arranged at one end of the through hole chose to the lower surface of the test block, and a slot is arranged at one end of the through hole close to the upper surface of the test block. According to the indoor experiment device, the structure is simple, different test blocks, slot shapes, sizes, flexible lining structures, resin formulations, curing conditions, test pressure and the like can be changed flexibly in a laboratory, and the device can really simulate the actual curing process of the lining layer and the actual force bearing condition of external water pressure resistance of the lining layer adhered to the test block, and test limit values of the external water pressure resistance of the lining layer.
Description
Technical field
The present invention relates to test unit field, be specifically related to a kind of indoor experimental apparatus of peel resistance strength of composite lining material, be applicable to measure the compound lining that is bonded in experiment material surface, the peel strength under the effect of compound lining dorsal part external water pressure.
Background technology
The small reservoir enormous amount that China's water conservancy industry is to be reinforced, because most of reservoir is all built in five sixties of last century and is gone in for water conservancy period in a big wag, because of historical reasons, culvert pipe ubiquity variety of problems and defect under dam.The reinforcing mode of at present culvert pipe under dam generally being taked mainly contains, and dam body is reinforced, excavated to modular repair by ways such as Pipe shaped culvert demolition reconstruction and the reinforcings of cover lined steel pipe.But in application, find, excavate dam body dismounting reconstruction expenses higher, segment length when construction, dam body crosses flood outstanding problem, excavate the dam body of rear backfill and originally between the dam body through settlement stability for many years, be not easy in conjunction with good, easily because non-uniform settling causes new dam body crack.Cover lined steel pipe is reinforced, and in order to make steel pipe send into smoothly former culvert pipe, it is even more that outer diameter of steel pipes must be less than former culvert pipe internal diameter 5～10cm, former caliber is dwindled too much, and once run into culvert pipe bending distortion or local faulting of slab ends, projection, very easily stuck, cause crag-fast awkward situation.In addition, grouting treatment must be carried out in the gap between steel pipe and former culvert pipe, but that grouting quality is not easy is closely knit, when culvert pipe is longer more so.To having bending or non-circular pipeline, steel pipe socket lining rule is at all at one's wit's end.In order to overcome above-mentioned drawback, in recent years, water conservancy system, is called the non-excavation pipeline based technique for in-situ remediation that flexible pipe turns over lining method or pull method into and introduces reinforcement culvert under dam in industry widespread uses such as oil, chemical industry, rock gas, municipal administrations a kind of.
But in industries such as oil, chemical industry, rock gas, municipal administrations, repairing the object of culvert pipe, is mainly that the fluid media (medium) that prevents conveying is revealed from pipe wall crack; Inner lining material is mainly subject to internal fluid pressure, does not have situation about being stripped under pipe external pressure.At water conservancy industry, the period of opening a sluice gate and drawing out some water between annual during irrigation period is not long, in culvert pipe, majority is free flow, the situation that occurs pressure current is few, now, inner lining material is to prevent that overpressure water is through the pipe wall crack intrusion dam body that leaks, and the stress of inner lining material is identical with industries such as oil, chemical industry, rock gas, municipal administrations.In most cases, culvert pipe upstream closing gate, culvert pipe inside is anhydrous, and inner lining material is mainly to prevent from managing outer infiltration dam body to be banketed in fine grained band inlet pipe through the rejected region such as pipe wall crack, hole, causes dam body seepage failure.Now, the industries such as the stress of inner lining material and oil, chemical industry, rock gas, municipal administration are different: be bonded in the inner liner of culvert pipe inwall under dam, cross over crack, in both sides, crack and concrete tube wall tight bond, bear the seepage pressure in crack.Known in the industry, the defect under dam on culvert pipe inwall is various, but to the most dangerous be penetrability crack or hole on inwall, fracture width or hole diameter are more dangerous more greatly.For the crack of same penetrability width or the penetrability hole of same diameter, if seepage pressure head is excessive, inner liner will be peeled off from concrete tube wall along edge of crack, or peel off together with the local tube wall concrete in crack.For this reason, must the peel strength of test inner liner under seepage pressure.
Because existing technical manual does not also specify experimental technique or the device of the peel strength of inner liner under outside tube water pressure, general with reference to mean of access in the industry, between experiment liner and concrete, just draw cohesive strength or 90 ° of anti tear peel strengths.
Wherein, China Engineering Construction Standardization Association's standard " Carbon Fiber Sheet-Reinforced rehabilitating concrete structure technology code " (CECS 146:2003) has specified just to draw the assay method of cohesive strength, the mensuration of just drawing cohesive strength between the method is applicable to and carbon fiber plate is supporting resene binding material individual layer or composite coating and concrete.What it was tested out is that sample and concrete are subject at whole surface of contact under the condition of pulling force simultaneously, just draws cohesive strength along adhesive surface normal direction.
90 ° of anti tear peel strengths are measured, specified by national standard " peeling strength test method " (GB/T 2790-1995), generally on 90 °, 180 ° peeling strength test machines, carry out, what measure is that flexible material is along or 180 ° directions in 90 ° with bonding substrates face, the cohesive strength while being got off by tearing.
Above-mentioned two kinds of assay methods all can not react the actual forced status of crack place inner lining material, therefore also just can not accurately measure the actual peel strength of liner under outside tube water pressure.
Patent of invention " a kind of measurement mechanism of compound lining peel strength " (patent No. 201010214055.4) has proposed the home position testing method of the anti-external water pressure of culvert pipe compound lining under a kind of dam, also be a kind of destructive test method, test complete need reparation dam body boring and tube wall experiment position.When building site is without boring, when grouting equipment, need transport specially boring, grouting equipment, testing expenses are higher, test consuming time longer.In addition, when culvert pipe diameter less, culvert pipe inwall test prepare and test after during to the repair of pilot region, personnel are difficult to maybe cannot enter, and need to adopt industrial robot, cause operating difficulties maybe cannot operate, the difficulty of implementing test is larger.
Summary of the invention
The object of the invention is the problems referred to above that exist for prior art, a kind of indoor experimental apparatus of peel resistance strength of composite lining material is provided, simulation be bonded in culvert pipe inwall under dam compound lining actual condition of cure and solidify after actual loading situation under anti-external water pressure, obtain the peel strength of liner under the effect of culvert pipe external water pressure.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of indoor experimental apparatus of peel resistance strength of composite lining material, comprise test block and be simultaneously provided with resin adhesive layer and another side the flexible compound liner that is provided with impermeable layer, the upper surface adhesion of the resin adhesive layer of flexible compound liner and test block, in test block, be provided with and run through the upper surface of test block and the through hole of lower surface, through hole is provided with screw thread water nozzle near one end of the lower surface of test block, and through hole is provided with slotted eye near one end of the upper surface of test block.
A kind of indoor experimental apparatus of peel resistance strength of composite lining material, also comprise cover plate, packing ring, pressure thick stick, bolt and water nozzle, packing ring is arranged in flexible compound and is lining with, cover plate is arranged on packing ring, press thick stick comprise pressure thick stick and press down thick stick, upper pressure thick stick and press down thick stick and by bolt, packing ring and cover plate are pressed in flexible compound and are lining with successively, cover plate is provided with installation through hole, through hole one end is installed and is communicated with water nozzle, cover plate lower surface curvature is identical with the upper surface curvature of test block.
The present invention compared with prior art, has the following advantages:
1, the present invention is simple in structure, and without employing, boring, grouting equipment are holed at dam facing, grouting, sealing of hole etc., reinforces on-the-spotly during without ready-made boring, grouting equipment when dam, can significantly save test fee and test period.
2, the present invention at indoor real simulation be bonded in the actual condition of cure of the resinoid bond being lining with in the flexible compound of culvert pipe inwall under dam, all can carry out flexible transformation and combination to following condition as required: the impregnation method of the structure of the geometric configuration of slotted eye and size, flexible compound liner, resin-bonded agent prescription, resinoid bond and temperature humidity condition, resinoid bond curing mode (solidifying under time, temperature, pressure, hydraulic pressure or water vapour or ultraviolet ray irradiation) in the material of test block, the roughness of test block surface and humidity, test block, wide adaptability.
If 3, test block of the present invention directly intercepts culvert pipe appropriate location under dam, the actual condition of cure and the actual conditions that are bonded in the resinoid bond being lining with in the flexible compound of culvert pipe inwall under dam are in full accord.
4, after the resinoid bond on inner liner of the present invention is bonded in and completes in test block and to solidify, can apply water pressure at the dorsal part of inner liner, at indoor real simulation be bonded in the actual loading situation of the anti-external water pressure of the compound lining of culvert pipe inwall under dam, test out the anti-external water pressure ultimate value of the inner liner of different curing, different curing times, convenient and practical.
Brief description of the drawings
Fig. 1 is plan structure schematic diagram of the present invention;
Fig. 2 is M-M direction sectional structure schematic diagram in Fig. 1;
Fig. 3 is that composite lining material is solidificated in the plan structure schematic diagram in test block;
Fig. 4 is N-N direction sectional structure schematic diagram in Fig. 3.
In figure: 1-test block; 2-flexible compound liner; 3-slotted eye; 4-screw thread water nozzle; 5-packing ring; 6-cover plate; 7-water nozzle; 8-presses thick stick; 9-bolt.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail.
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of indoor experimental apparatus of peel resistance strength of composite lining material, comprise test block 1 and be simultaneously provided with resin adhesive layer and another side the flexible compound liner 2 that is provided with impermeable layer, the upper surface adhesion of the resin adhesive layer of flexible compound liner 2 and test block 1, in test block 1, be provided with and run through the upper surface of test block 1 and the through hole of lower surface, through hole is provided with screw thread water nozzle 4 near one end of the lower surface of test block 1, and through hole is provided with slotted eye 3 near one end of the upper surface of test block 1.
A kind of indoor experimental apparatus of peel resistance strength of composite lining material, also comprise cover plate 6, packing ring 5, press thick stick 8, bolt 9 and water nozzle 7, packing ring 5 is arranged on flexible compound liner 2, cover plate 6 is arranged on packing ring 5, press thick stick 8 comprise pressure thick stick and press down thick stick, upper pressure thick stick and press down thick stick and by bolt 9, packing ring 5 and cover plate 6 are pressed on flexible compound liner 2 successively, cover plate 6 is provided with installation through hole, through hole one end is installed and is communicated with water nozzle 7, cover plate 6 lower surface curvature are identical with the upper surface curvature of test block 1.
Adjusting bolt 9, is pressed on the upper surface of test block 1 cover plate 6, packing ring 5, flexible compound liner 2, and forms a cavity between cover plate 6, packing ring 5, flexible compound liner 2.Water or the gas with uniform temperature and pressure enter in this cavity by the water nozzle 7 on cover plate 6, and a side of flexible compound liner 2 impregnating resins is bonded on the upper surface of test block 1 until resin completes curing.
Remove after hold down gag, as shown in Figure 3, Figure 4, test external water pressure source enters into slotted eye 3 places by screw thread water nozzle 4 and through hole, in a side of curing flexible compound liner 2 resin adhesive layers, inner liner is applied to test hydraulic pressure.
The geometric configuration of slotted eye 3 as above and size are that under simulation dam, culvert pipe inner wall defect arranges, and can be circle, polygon, slit etc., and slotted eye 3 both sides, in the time that test block 1 upper surface is provided with the discrepancy in elevation, can simulates culvert pipe inwall faulting of slab ends under dam, fall bank defect.
As a kind of preferred version, test block 1 directly intercepts culvert pipe appropriate location under dam, and the slotted eye 3 in test block 1 forms with cutting piece made from diamond (or water cutter) cutting in test block 1 by culvert pipe crack situation under dam.Through hole in test block 1 is closely provided with screw thread water nozzle 4 near one end of the lower surface of test block 1, and its effect is to be connected with test pressure source in next step process of the test, and ensures that screw thread water nozzle 4 is water-tight in test.
The inner ring that makes packing ring 5 is from the hole of slotted eye 3 along away from as far as possible, but is no more than farthest test block upper surface outer and makes packing ring have certain width.Packing ring 5 adopts the sheet material of neoprene plate or silicane rubber plate or similar material, cuts away core and makes.
The cover plate 6 of hold down gag adopts the upper surface of test block 1 as template, be separated by with plastic sheeting, watering resinoid bond (or the similar material such as epoxy resin or sand-cement slurry) is made, the cover plate 6 lower surface curvature of hold down gag are identical with the upper surface curvature of test block 1 like this, in the time that packing ring is pressed to test block upper surface by hold down gag, cover plate lower surface, packing ring, liner and test block upper surface are just easily realized and being closely cooperated.Bore one in cover plate 6 centers through hole is installed, water nozzle 7 one end are closely inserted and are installed in through hole after smearing resinoid bond.Solidify if resin adhesive layer adopts under UV-irradiation, cover plate 6 adopts the thick poly (methyl methacrylate) plate of a printing opacity, and its lower surface curvature is ground to identical with the upper surface curvature of test block 1, also closely inserts a water nozzle 7 in drill flute hole, center 3.
On flexible compound liner 2 after immersion test resinoid bond, flexible lining 2 is bondd by resin bed and test block 1, bolt on 9, by cover plate 5, packing ring 4, flood the flexible compound liner 2 of resin, test block 1 forces together, packing ring 4 has formed a cavity between cover plate 5 and flexible compound liner 2, there is water or the gas of test temperature and pressure, enter cover plate 6 by water nozzle 7, in the cavity that packing ring 4 and flexible lining layer 2 impermeable layer one side surround, in flexible lining 2 impermeable layer one sides, it is exerted pressure, it is close in test block 1, until that resin completes is curing.
Afterwards, remove bolt 9, cover plate 6, packing ring 5, screw thread water nozzle 4 is connected to and provides and show on the pressure source of testing hydraulic pressure, the water with test pressure enters into slotted eye 3 places through screw thread water nozzle 4, having cured the dorsal part of the flexible compound liner 2 on the testing surface being bonded in test block 1 (side of resin bed), flexible compound liner 2 is applied to test water pressure.Keep test water pressure to stablize after certain hour, read the pressure gauge reading on test pressure source.Improve step by step test water pressure, until peeled off and leak by water pressure in flexible compound liner 2 and the upper surface somewhere of test block 1, this one-level test pressure value is exactly the anti-external water pressure ultimate value of flexible compound liner 2.
In fact, the present invention is not limited in culvert pipe and the anti-external water pressure ultimate value of flexible lining under test dam, flexible compound liner 2 materials, structure or thickness (for example adopt the multi-layer compound structure of geomembrane and dacron felt, with the composite structure of glass fibre, with composite structure of carbon fiber etc., every kind of material can adopt the different numbers of plies or thickness, can have braiding or nonwoven etc.); Changing the material of test block 1 or the shape and size of slotted eye 3 (for example can adopt the concreting of different intensity grades or cut out difformity or the test block of size 1, can build or cut out the slotted eye 3 of difformity or size in test block 1; Change cementing agent kind or formula (for example epoxy adhesive or polyester resin binder etc.); Change curing mode, set time etc., by above-mentioned steps, all can test out under various corresponding test conditions the anti-external water pressure ultimate value of flexible compound liner 2.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (1)
1. the indoor experimental apparatus of a peel resistance strength of composite lining material, comprise test block (1) and be simultaneously provided with resin adhesive layer and another side the flexible compound liner (2) that is provided with impermeable layer, the upper surface adhesion of the resin adhesive layer of flexible compound liner (2) and test block (1), it is characterized in that: in test block (1), be provided with and run through the upper surface of test block (1) and the through hole of lower surface, through hole is provided with screw thread water nozzle (4) near one end of the lower surface of test block (1), through hole is provided with slotted eye (3) near one end of the upper surface of test block (1), also comprise cover plate (6), packing ring (5), press thick stick (8), bolt (9) and water nozzle (7), packing ring (5) is arranged on flexible compound liner (2), cover plate (6) is arranged on packing ring (5), press thick stick (8) to comprise pressure thick stick and press down thick stick, upper pressure thick stick and press down thick stick and by bolt (9), packing ring (5) and cover plate (6) are pressed on flexible compound liner (2) successively, cover plate (6) is provided with installation through hole, through hole one end is installed to be communicated with water nozzle (7), cover plate (6) lower surface curvature is identical with the upper surface curvature of test block (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210179023.4A CN102680398B (en) | 2012-06-01 | 2012-06-01 | Indoor experiment device for testing anti-stripping strength of composite lining materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210179023.4A CN102680398B (en) | 2012-06-01 | 2012-06-01 | Indoor experiment device for testing anti-stripping strength of composite lining materials |
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| Publication Number | Publication Date |
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| CN102680398A CN102680398A (en) | 2012-09-19 |
| CN102680398B true CN102680398B (en) | 2014-06-11 |
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| CN201210179023.4A Active CN102680398B (en) | 2012-06-01 | 2012-06-01 | Indoor experiment device for testing anti-stripping strength of composite lining materials |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994001279A1 (en) * | 1992-07-08 | 1994-01-20 | Mann George E | Adhesion testing |
| NL1006760C2 (en) * | 1997-08-11 | 1999-02-12 | Univ Eindhoven Tech | Apparatus and method for determining the adhesive strength of a coating on a substrate. |
| CN101881721B (en) * | 2010-06-22 | 2012-04-04 | 湖北省水利水电勘测设计院 | Device for measuring peel resistance strength of composite lining material |
| CN202661365U (en) * | 2012-06-01 | 2013-01-09 | 湖北省水利水电规划勘测设计院 | Indoor experimental device for stripping resistance of composite inner lining material |
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