CN1945321A - Natural leakage detector for micro crack state concrete - Google Patents
Natural leakage detector for micro crack state concrete Download PDFInfo
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- CN1945321A CN1945321A CN 200610117573 CN200610117573A CN1945321A CN 1945321 A CN1945321 A CN 1945321A CN 200610117573 CN200610117573 CN 200610117573 CN 200610117573 A CN200610117573 A CN 200610117573A CN 1945321 A CN1945321 A CN 1945321A
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Abstract
The present invention relates to measuring and testing technology, and is especially one kind of natural permeation instrument for concrete in micro crack state. The natural permeation instrument includes water head testing pipe, top plate, ring top water tank, ring bottom water tank, bottom plate, nut and screw. The present invention can obtain the permeation property of concrete in micro crack state and its quantitative evaluating parameter, natural permeation coefficient K. In addition, the instrument is simple in making and operation and convenient.
Description
Technical field
What the present invention relates to is a kind of device of technical field of measurement and test, particularly a kind of natural leakage detector for micro crack state concrete.
Background technology
Anti-permeability performance is an importance that embodies concrete durability, and this just needs the concrete perviousness of quantitative test.The quantitative test of concrete permeability has two kinds of methods, the one, anti-penetration grade method, the 2nd, permeated height method at present.These two the suitable tests of test are comparatively fine and close, are not subjected to the concrete perviousness under the state of nature of external force effect.In underground waterproof engineering, the impervious requirement of xoncrete structure is divided with classification of waterproof.From classification of waterproof three, the level Four criterion can draw: the concrete that is in the fine fisssure faulted condition also can satisfy the waterproof requirement of underground works different brackets (three grades, level Four), and by conventional anti-penetration grade method, the anti-penetration grade that institute's micrometer rhegma is hindered state concrete all is lower than S2, and this anti-penetration grade is unallowed in the conventional structure design, and this explanation anti-penetration grade method is not suitable for quantitatively evaluating and testing the permeance property of fine fisssure state concrete.Another kind method is that concrete sample is forced into 0.8MPa, tests the infiltration height after its splitting again, or calculates concrete anti-permeability performance parameter thus: relative coefficient of permeability Sk.For the fine fisssure state concrete, learn by test: under the constant voltage of 0.8MPa, test specimen the situation of end face seepage just all occurs under less than 24 hours situation, so the height method that seeps water lost efficacy; And the principle of relative coefficient of permeability method institute foundation: the Darcy's law research object is comparatively fine and close homogeneous material, but not has the concrete sample of microfissure, so the relative coefficient of permeability method also lost efficacy.In sum, two kinds of methods of quantitatively evaluating and testing concrete permeability commonly used at present all are not suitable for evaluating and testing the fine fisssure state concrete.
Find through literature search prior art, (standard is numbered the common up-to-date standard " concrete for hydraulic structure testing regulations " of working out of Nanjing hydro science research section and China Water Resources ﹠ Hydropower Science Research Institute: DL/T 5150-2001) propose two kinds of concrete component testing permeability test methods and instrument requirement in 4.21 regulations (177 pages) and 4.22 regulations (178 pages), the former regulation is used concrete impervious instrument, and classification adds hydraulic pressure to concrete, provides concrete anti-penetration grade; The latter uses concrete impervious instrument that concrete sample is forced into 0.8MPa earlier, tests the infiltration height after its splitting again, or calculates concrete anti-permeability performance parameter thus: relative coefficient of permeability Sk.The weak point of concrete for hydraulic structure testing regulations is: can only test concrete perviousness comparatively fine and close under the state of nature, can't have damage by testing inner, the perviousness that has the concrete component of microfissure, and these two kinds of test methods all require to use concrete impervious instrument, complicated operation, consuming time more and must carry out indoor, reduced the convenience of experimental study.
In further literature search, find identical with theme of the present invention or similar device as yet.
Summary of the invention
Can't evaluate and test the problem of concrete permeability for solving conventional impermeability test, the invention provides a cover natural leakage detector for micro crack state concrete, make it can quantitatively evaluate and test the concrete perviousness of fine fisssure faulted condition, for splitting of allow occurring in the underground works do not oozed or little concrete material and structural design of oozing state provides reference and foundation.
The present invention is achieved by the following technical solutions, the present invention includes: hydraulic head test tube, top board, top annulus water tank, bottom annulus water tank, base plate, nut, screw rod.
Top board, base plate are linked together by the screw rod that four and nut are complementary, and four jiaos of top board and base plate are provided with screw, and screw passes top board and base plate.Top board and base plate all have a hole, and roof hole is a blasthole, and bottom plate hole is an apopore, and two Kong Kongxin coincide with the horizontal projection point of top board, base plate diagonal line intersection point respectively.Hydraulic head test tube is positioned at the top board upper end, and the hydraulic head test tube hole heart coincides at the projection and the top board preformed hole hole heart of surface level.Top annulus water tank and bottom annulus water tank size are in full accord.The bottom of top board is connected with top annulus water tank, and the bottom of bottom annulus water tank is connected with the top of base plate, and the center of circle of top annulus water tank and bottom annulus water tank all coincides with the top board preformed hole hole heart in the projection of surface level.
Microfissure right cylinder concrete sample to be measured is between top annulus water tank and bottom annulus water tank.During test, initial head is at scale 350mm place in the control hydraulic head test tube.The record test is carried out the time, accurately to minute, apart from water filling in the time of t writing time hour, measure the head height value, accurately to millimeter mm, utilize formula (1) to calculate fine fisssure concrete naturally osmotic COEFFICIENT K, wherein ht is a t hydraulic head test tube head height (unit is mm) constantly, and this highly comprises hydraulic head test tube head indicated value, top plate thickness, top annulus water tank height and specimen thickness.Splitting the concrete crack of drawing test to produce is the simple check crack, and the seepage flow in the naturally osmotic test is simple check crack laminar flow, can obtain computing formula (1) according to crack current cubic law.
Utilize naturally osmotic instrument provided by the present invention, and test according to the above-mentioned course of work, can obtain the permeance property of the fine fisssure state concrete test specimen that conventional impermeability test instrument can't evaluate and test, and draw its permeance property and quantitatively evaluate and test parameter: the naturally osmotic COEFFICIENT K; This cover instrumentation is simpler with operation simultaneously, has improved the convenience of experimental study.
Description of drawings
Fig. 1 structural representation of the present invention
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment has provided detailed embodiment being to implement under the prerequisite with the technical solution of the present invention, but that protection scope of the present invention is not limited to is following
Embodiment.
As shown in Figure 1, present embodiment comprises: hydraulic head test tube 1, top board 2, top annulus water tank 3, bottom annulus water tank 4, base plate 5, nut 6, screw rod 7.Top board 2 tops and hydraulic head test tube 1 glueds joint, and glued joint with annulus water tank 3 top board 2 bottoms, base plate 5 and 4 splicing of bottom annulus water tank, and this two-part annulus is relative, and links together by the screw rod 7 that is complementary with nut 6.
Described hydraulic head test tube 1 is positioned at the top board upper end, and the hydraulic head test tube 1 hole heart coincides at the projection and the top board 2 preformed hole hole hearts of surface level.Described hydraulic head test tube 1 internal diameter is 10mm, and external diameter is 20mm, and length is 400mm.Standard length scale value on the described hydraulic head test tube 1 is zero at the surface of contact place with top board 2, and total scale length is 350mm.
Described top board 2, base plate 5 are measure-alike: longly be 300mm, wide is 200mm, and thick is 10mm.
Described top board 2 all has a hole with base plate 3, and top board 2 holes are blasthole, and base plate 3 holes are apopore, and two Kong Kongxin coincide with the horizontal projection point of top board 2, base plate 3 diagonal line intersection points respectively, and two pore radius are 10mm.
Described top annulus water tank 3 is in full accord with bottom annulus water tank 4 sizes, and the two internal diameter is 100mm, and external diameter is 120mm, and height is 30mm.
Described top annulus water tank 3 all coincides with the top board 2 preformed hole hole hearts in the projection of surface level with the center of circle of bottom annulus water tank 4.
The manufacturing materials of described top board 2, base plate 5, top annulus water tank 3, bottom annulus water tank 4 and hydraulic head test tube 1 is organic glass.
Described nut 6 is the M10 nut.
Described screw rod 7 has four, is complementary with the M10 nut, and long is 300mm, and material is the Q235A steel.
The distance of the pairwise orthogonal edges of boards at the Kong Xinyu top board 2 of described screw rod 7, place, base plate 5 every right angle is 20mm.
Before the test, test specimen 8 is between top annulus water tank 3 and bottom annulus water tank 4, and by regulating disc and the surface level keeping parallelism that eight nuts 6 make test specimen 8, test specimen 8 is sealing with silica gel 9 with top annulus water tank 3, annulus water tank 4 contact positions, bottom.During test, initial head is at scale 350mm place in the control hydraulic head test tube 1.Record test carrying out time t, and measure head height value ht, utilize formula (1) to calculate fine fisssure concrete naturally osmotic COEFFICIENT K at last.
Claims (9)
1, a kind of natural leakage detector for micro crack state concrete, comprise: hydraulic head test tube, top board, top annulus water tank, bottom annulus water tank, base plate, nut, screw rod, it is characterized in that, top board top and hydraulic head test tube glued joint, glued joint with the annulus water tank top board bottom, base plate and bottom annulus water tank glued joint, this two-part annulus is relative, and link together by the screw rod that is complementary with nut, top board and base plate all have a hole, and roof hole is a blasthole, and bottom plate hole is an apopore, two Kong Kongxin respectively with top board, the horizontal projection point of base plate diagonal line intersection point coincides, and the hydraulic head test tube hole heart coincides at the projection and the top board preformed hole hole heart of surface level.
2, natural leakage detector for micro crack state concrete according to claim 1 is characterized in that, the standard length scale value on the described hydraulic head test tube is zero at the surface of contact place with top board, and total scale length is 350mm.
According to claim 1 or 2 described natural leakage detector for micro crack state concrete, it is characterized in that 3, described hydraulic head test tube internal diameter is 10mm, external diameter is 20mm, and length is 400mm.
4, natural leakage detector for micro crack state concrete according to claim 1 is characterized in that, described top board, base plate size are identical: longly be 300mm, wide is 200mm, and thick is 10mm.
5, natural leakage detector for micro crack state concrete according to claim 1 is characterized in that, described roof hole and bottom plate hole, and two pore radius are 10mm.
6, natural leakage detector for micro crack state concrete according to claim 1 is characterized in that, described top annulus water tank and bottom annulus water tank are measure-alike, and the two internal diameter is 100mm, and external diameter is 120mm, and height is 30mm.
According to claim 1 or 6 described natural leakage detector for micro crack state concrete, it is characterized in that 7, the center of circle of described top annulus water tank and bottom annulus water tank all coincides with the top board preformed hole hole heart in the projection of surface level.
8, natural leakage detector for micro crack state concrete according to claim 1 is characterized in that, the distance of the pairwise orthogonal edges of boards at the Kong Xinyu top board of described screw rod, place, the every right angle of base plate is 20mm.
According to claim 1 or 8 described natural leakage detector for micro crack state concrete, it is characterized in that 9, described screw rod 7 has four, long is 300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101175738A CN100557443C (en) | 2006-10-26 | 2006-10-26 | Natural leakage detector for micro crack state concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101175738A CN100557443C (en) | 2006-10-26 | 2006-10-26 | Natural leakage detector for micro crack state concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1945321A true CN1945321A (en) | 2007-04-11 |
| CN100557443C CN100557443C (en) | 2009-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006101175738A Expired - Fee Related CN100557443C (en) | 2006-10-26 | 2006-10-26 | Natural leakage detector for micro crack state concrete |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482470B (en) * | 2009-02-13 | 2010-12-08 | 西北农林科技大学 | Test method for anti-permeability performance of fluid sealant and substrate bonding sample interface |
| CN103196808A (en) * | 2013-03-27 | 2013-07-10 | 山东大学 | Water seepage collecting and testing system for fluid-solid coupling test |
| CN105842125A (en) * | 2016-05-19 | 2016-08-10 | 成都理工大学 | Fracture simulation adjusting mechanism of grouting expansion testing device |
| CN107765328A (en) * | 2017-12-01 | 2018-03-06 | 黄河勘测规划设计有限公司 | Portable compact type slug test tester |
| CN112665789A (en) * | 2020-12-17 | 2021-04-16 | 深圳地铁建设集团有限公司 | Underground building concrete structure waterproof quality field detection method |
-
2006
- 2006-10-26 CN CNB2006101175738A patent/CN100557443C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482470B (en) * | 2009-02-13 | 2010-12-08 | 西北农林科技大学 | Test method for anti-permeability performance of fluid sealant and substrate bonding sample interface |
| CN103196808A (en) * | 2013-03-27 | 2013-07-10 | 山东大学 | Water seepage collecting and testing system for fluid-solid coupling test |
| CN103196808B (en) * | 2013-03-27 | 2015-04-22 | 山东大学 | Water seepage collecting and testing system for fluid-solid coupling test |
| CN105842125A (en) * | 2016-05-19 | 2016-08-10 | 成都理工大学 | Fracture simulation adjusting mechanism of grouting expansion testing device |
| CN105842125B (en) * | 2016-05-19 | 2018-07-17 | 成都理工大学 | A kind of crack analog regulation mechanism of slip casting diffusion test set |
| CN107765328A (en) * | 2017-12-01 | 2018-03-06 | 黄河勘测规划设计有限公司 | Portable compact type slug test tester |
| CN107765328B (en) * | 2017-12-01 | 2023-08-01 | 黄河勘测规划设计研究院有限公司 | Portable impact micro-water test tester |
| CN112665789A (en) * | 2020-12-17 | 2021-04-16 | 深圳地铁建设集团有限公司 | Underground building concrete structure waterproof quality field detection method |
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| Publication number | Publication date |
|---|---|
| CN100557443C (en) | 2009-11-04 |
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