CN103969183A - Test device and method for testing bonding strength of anchor rod or anchor rope and concrete - Google Patents
Test device and method for testing bonding strength of anchor rod or anchor rope and concrete Download PDFInfo
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- CN103969183A CN103969183A CN201410214882.1A CN201410214882A CN103969183A CN 103969183 A CN103969183 A CN 103969183A CN 201410214882 A CN201410214882 A CN 201410214882A CN 103969183 A CN103969183 A CN 103969183A
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Abstract
The invention relates to the technical field of the test of concrete mechanical property, and discloses a test device for testing the bonding strength of an anchor rod or an anchor rope and concrete. The test device comprises a sleeve for installation of the anchor rod or the anchor rope and a drawing device for axially drawing the anchor rod or the anchor rope, wherein a positioning hole is arranged on the center of the bottom of the sleeve and used for positioning one end of the anchor rod or the anchor rope, concrete is filled in the sleeve so as to fix the anchor rod or the anchor rope in the sleeve, the other end of the anchor rod or the anchor rope extends out of the sleeve, and the drawing device is connected to the extension end of the anchor rod or the anchor rope so as to carry out the drawing test. The invention also relates to a method for testing the bonding strength of the anchor rod or the anchor rope in a laboratory. The test device is simple in structure, the test process is time-saving and labor-saving, and the test result is accurate and easy to obtain.
Description
Technical field
The present invention relates to mechanical performance of concrete experimental technique field, particularly relate to a kind of test unit and method of testing anchor pole or anchor cable and Concrete Bond Strength.
Background technology
Anchor sprayed concrete combined supporting (abbreviation bolt-spray support) is one of surrounding rock supporting technology being most widely used in current ground and underground Geotechnical Engineering, is all used widely in the roadway chamber of mine engineering, the tunnel slope of road and rail, the dam foundation Gao Po of water conservancy and hydropower, the field such as deep basal pit, the underground installation of defence engineering of civil engineering work with its unique technological merit and outstanding economic benefit.In field, colliery, bolt-spray support is usually used in the permanent supporting of pit shaft, pit bottom and main developing, preparatory workings.In coal mine down-hole tunnel working-yard, concrete is ejected on the country rock that sets anchor pole, from the bonding initial set starting to last setting and hardening, the cohesive action of concrete spray coating and anchor pole is most important, cohesive strength too small or lose, spray-up will with anchor pole even country rock peel off, ftracture, cannot bring into play its sealing aqueous vapor, supporting country rock effect, also cannot reach with anchor pole and member thereof and coordinate stressed effect.Therefore, accurately test anchor pole and concrete cohesive strength, very important to Concrete Injection Rock Bolting Design In Openings.
At present, the anchor pole that home and abroad colliery is generally applied and Concrete Bond Strength method of testing are pulling out method, and the mode that is embedded in the reinforcing pull rod in concrete sample by drawing reaches the object of testing cohesive strength, is used for site test.Although the method test principle is simple, experimental enviroment complexity, particularly inferior in the exigent occasion of test unit explosion proof ratings for coal mine, test meeting causes potential danger to down-hole at the scene, but there is no at present in laboratory large-scale application.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is how to test quickly and easily anchor pole or anchor cable and Concrete Bond Strength in laboratory.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of test unit of testing anchor pole or anchor cable and Concrete Bond Strength, it comprises for the sleeve of skyhook or anchor cable and the draw-off gear for described anchor pole or anchor cable are carried out to axial drawing, the bottom center of described sleeve is provided with pilot hole, for one end of described anchor pole or anchor cable is positioned, by loading full concrete by described anchor pole in described sleeve or anchor cable is fixed in described sleeve and the other end of described anchor pole or anchor cable extends described sleeve, the external part that is connected to described anchor pole or anchor cable by described draw-off gear carries out pull-out test.
Wherein, this test unit also comprises the cover plate of the openend for being set in described sleeve, and the center of top of described cover plate is provided with the through hole identical with described pilot hole size, for the external part of described anchor pole or anchor cable is positioned.
Wherein, the outer wall of described sleeve is provided with external thread, and the inwall of described cover plate is provided with internal thread, and described sleeve and cover plate are threaded.
Wherein, the bore of described cover plate is greater than the bore of described sleeve, and described cover plate is connected on described sleeve.
Wherein, described draw-off gear is anchor rod drawing meter or anchorage cable stretching meter.
Wherein, described anchor rod drawing meter or anchorage cable stretching meter are provided with tensimeter.
Wherein, described anchor rod drawing meter or anchorage cable stretching meter are provided with hydraulic jack.
Wherein, described anchor rod drawing meter or anchorage cable stretching meter are provided with the oil pump for driving described hydraulic jack.
The present invention also provides the test unit of the test anchor pole of a kind of utilization as described in technique scheme or anchor cable and Concrete Bond Strength to carry out the laboratory testing method of anchor pole or anchor cable and Concrete Bond Strength, and it comprises the steps:
S1: test specimen is made and maintenance: first plug anchor pole or anchor cable in the middle of sleeve, one end of described anchor pole or anchor cable is through the pilot hole of sleeve bottom, keep anchor pole or anchor cable placed in the middle, then in sleeve, fill up the good concrete of mixing in advance, and be placed in vibration compacting on shaking table, then the test specimen after, concrete initial set complete by vibrating is placed in mark and supports indoor maintenance a period of time, after the concrete in sleeve solidifies completely, finally makes standard specimen;
S2: test specimen is installed: the external part of anchor pole or anchor cable is connected with the link of described draw-off gear, after fixing, prepares to read pulling force;
S3: drawing test specimen: utilize described draw-off gear to described anchor pole or the reinforcing of anchor cable continuous uniform, observe the variation of the pulling force registration showing on described draw-off gear, until test specimen is pulled out simultaneously;
S4: reading: when pulling force reading no longer changes, test specimen is while being extracted completely, stops the application of force, finally records drawing load, single test is complete.
(3) beneficial effect
Compared with prior art, the present invention has the following advantages:
A kind of test unit and method of testing anchor pole or anchor cable and Concrete Bond Strength provided by the invention, wherein for testing the test unit of anchor pole or anchor cable and Concrete Bond Strength, comprise for the sleeve of skyhook or anchor cable and the draw-off gear for described anchor pole or anchor cable are carried out to axial drawing, by load full concrete in described sleeve, described anchor pole or anchor cable are fixed in described sleeve, the external part that is connected to described anchor pole or anchor cable by described draw-off gear carries out pull-out test, this test unit is simple in structure, utilize simple device just can realize the test to concrete and anchor pole or anchor cable cohesive strength, in addition for testing the laboratory testing method of anchor pole or anchor cable and Concrete Bond Strength, from being fabricated into applying of load and can easily realizing in laboratory of test specimen, and process of the test is time saving and energy saving, and test findings is accurately easy to get.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of test unit of testing anchor pole or anchor cable Concrete Bond Strength of the present invention.
In figure: 1: sleeve; 2: pilot hole; 3: concrete; 4: anchor pole; 5: cover plate.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following instance is used for illustrating the present invention, but is not used for limiting the scope of the invention.
In description of the invention, it should be noted that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of instructions such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
As shown in Figure 1, for a kind of test unit of testing anchor pole or anchor cable and Concrete Bond Strength provided by the invention, it comprises for the sleeve 1 of skyhook 4 or anchor cable and the draw-off gear for described anchor pole 4 or anchor cable are carried out to axial drawing, the bottom center of described sleeve 1 is provided with pilot hole 2, for one end of described anchor pole 4 or anchor cable is positioned, by at the full concrete 3 of the interior filling of described sleeve 1 by described anchor pole 4 or anchor cable is fixed in described sleeve 1 and the other end of described anchor pole 4 or anchor cable extends described sleeve 1, the external part that is connected to described anchor pole 4 or anchor cable by described draw-off gear carries out pull-out test, the direction of arrow shown in figure is drawing direction.Particularly, for simulated field situation, described anchor pole 4, anchor cable adopt the most general material of current ore deposit down-hole application to make, and the specification of preferred described anchor pole 4 is: diameter is that 22mm, length are that 350mm, yield strength are that the body of rod of 335MPa, anchor pole 4 is that the vertical muscle screw-thread steel of left-handed nothing, bottom thread are M24; The specification of anchor cable is: diameter is that 22mm, length are that 350mm, Breaking load are that 600kN, material are 1 × 19 strand of birdcage steel strand wires.
This test unit also comprises the cover plate 5 of the openend for being set in described sleeve 1, and the center of top of described cover plate 5 is provided with the through hole identical with described pilot hole 2 sizes, for the external part of described anchor pole 4 or anchor cable is positioned.Described sleeve 1 is steel hollow cylinder, and preferably internal diameter is that 55mm, external diameter are that 60mm, wall thickness are that 5mm, axial length are 200mm, and top is uncovered, and pilot hole 2 diameters of bottom are 25mm; Described cover plate 5 is steel short cylinder, and preferably internal diameter is that 60mm, external diameter are that 65mm, thickness are that 5mm, axial length are 30mm, and the through-hole diameter in card is 25mm; Insert in the pilot hole 2 of sleeve 1 bottom described anchor pole 4 or anchor cable one end, and the other end is through the through hole of described cover plate 5, and described cover plate 5 is overlapped to the top of sleeve 1, can ensure that in the time of shaking concrete 3 anchor pole 4 or anchor cable can be interior placed in the middle at sleeve 1.
For the reliability that described sleeve 1 is connected with cover plate 5, be preferably provided with external thread at the outer wall of described sleeve 1, the inwall of described cover plate is provided with internal thread, and described sleeve 1 and cover plate are threaded; The bore of common described cover plate 5 is greater than the bore of described sleeve 1, also described cover plate 5 directly can be connected on described sleeve 1, simple in structure.
Described draw-off gear is anchor rod drawing meter or anchorage cable stretching meter, and described anchor rod drawing meter uses LDZ300-100 type rockbolt tension meter, and draft is 300kN, and stroke is 100mm; Described anchorage cable stretching meter uses YCN300-180 type anchorage cable stretching meter, and draft is 300kN, and stroke is 180mm.
In order conveniently to read pulling force numerical value F, described anchorage cable stretching meter or anchor rod drawing meter are provided with tensimeter, are preferably YS-1 type digital display type tensimeter, and it has peak value maintenance, storage and query function.
Described anchor rod drawing meter or anchorage cable stretching meter are provided with hydraulic jack, be preferably feed-through hydraulic lifting jack, the lifting jack of described anchor rod drawing meter is furnished with screw rod and gland nut, screw rod one end is provided with internal thread, the other end is provided with external thread, screw rod is through described lifting jack, internal thread one end connects spiral thread on anchor bolt external part, external thread one end connects gland nut, by tightening the fixing described anchor pole of gland nut and described lifting jack, jack piston reach when voltage supply, withstand described sleeve uncovered, after the relative piston of jack cylinder, move, drive gland nut hauls screw rod and anchor pole moves backward, thereby realize the process of outside drawing bolt, the built-in cone anchorage that can block described anchor cable external part of lifting jack of described anchorage cable stretching meter, jack piston reach when voltage supply, the conehead that promotes conical ground tackle shrinks locking anchor cable, and it is uncovered to withstand described sleeve, after the relative piston of jack cylinder, move, drive ground tackle sticks anchor cable and outwards moves, thereby realizes the process of outside stretch-draw anchor.
Described anchor rod drawing meter or anchorage cable stretching meter are provided with the oil pump for driving described hydraulic jack, are preferably hand oil pump, by manual pressure, draw force feed and oil return for described lifting jack.
The present invention also provides the test unit of the test anchor pole of a kind of utilization as described in technique scheme or anchor cable and Concrete Bond Strength to carry out the laboratory testing method of anchor pole or anchor cable and Concrete Bond Strength, and it comprises the steps:
S1: test specimen is made and maintenance: first plug anchor pole 4 or anchor cable in the middle of sleeve 1, one end of described anchor pole 4 or anchor cable is through the pilot hole 2 of sleeve 1 bottom, then fill up toward 1 li, sleeve the concrete 3 that mixing is good in advance, then overlap upper sheath cover 5 at the other end of described anchor pole 4 or anchor cable, be fixedly connected with described sleeve 1, keep anchor pole or anchor cable placed in the middle, and be placed on vibration compacting on shaking table, then will vibrate complete, test specimen after concrete 3 initial sets is placed on mark and supports indoor maintenance a period of time, preferably 28 days, after the complete setting and hardening of concrete 3 in sleeve 1, finally make standard specimen,
S2: test specimen is installed: the inside groove that the external part of anchor pole 4 or anchor cable is inserted to corresponding lifting jack, utilize the supporting screw rod of described lifting jack and gland nut by fixing anchor pole 4, or utilize the built-in ground tackle of lifting jack by anchorage cable anchoring, after fixing, with high-pressure rubber pipe connection oil pump and jack cylinder, open tensimeter and prepare reading;
S3: drawing test specimen: open the valve of oil pump, regulate described valve to keep the reinforcing of described lifting jack continuous uniform, afterburning speed is controlled at 20～40N/s, observes described tensimeter registration simultaneously and changes, until test specimen is pulled out;
S4: reading: when pressure gauge reading no longer changes, test specimen is while being extracted completely, stops the application of force, finally records drawing load, single test is complete.
The present invention is simple in structure, can test quickly and easily in laboratory the cohesive strength of anchor pole or anchor cable and concrete 3, has simplified the experimentation of on-the-spot drawing.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. test the test unit of anchor pole or anchor cable and Concrete Bond Strength for one kind, it is characterized in that, comprise for the sleeve of skyhook or anchor cable and the draw-off gear for described anchor pole or anchor cable are carried out to axial drawing, the bottom center of described sleeve is provided with pilot hole, for one end of described anchor pole or anchor cable is positioned, by loading full concrete by described anchor pole in described sleeve or anchor cable is fixed in described sleeve and the other end of described anchor pole or anchor cable extends described sleeve, the external part that is connected to described anchor pole or anchor cable by described draw-off gear carries out pull-out test.
2. the test unit of test anchor pole as claimed in claim 1 or anchor cable and Concrete Bond Strength, it is characterized in that, also comprise the cover plate of the openend for being set in described sleeve, the center of top of described cover plate is provided with the through hole identical with described pilot hole size, for the external part of described anchor pole or anchor cable is positioned.
3. the test unit of test anchor pole as claimed in claim 2 or anchor cable and Concrete Bond Strength, is characterized in that, the outer wall of described sleeve is provided with external thread, and the inwall of described cover plate is provided with internal thread, and described sleeve and cover plate are threaded.
4. the test unit of test anchor pole as claimed in claim 2 or anchor cable and Concrete Bond Strength, is characterized in that, the bore of described cover plate is greater than the bore of described sleeve, and described cover plate is connected on described sleeve.
5. the test unit of test anchor pole as claimed in claim 1 or anchor cable and Concrete Bond Strength, is characterized in that, described draw-off gear is anchor rod drawing meter or anchorage cable stretching meter.
6. the test unit of test anchor pole as claimed in claim 5 or anchor cable and Concrete Bond Strength, is characterized in that, described anchor rod drawing meter or anchorage cable stretching meter are provided with tensimeter.
7. the test unit of test anchor pole as claimed in claim 6 or anchor cable and Concrete Bond Strength, is characterized in that, described anchor rod drawing meter or anchorage cable stretching meter are provided with hydraulic jack.
8. the test unit of test anchor pole as claimed in claim 7 or anchor cable and Concrete Bond Strength, is characterized in that, described anchor rod drawing meter or anchorage cable stretching meter are provided with the oil pump for driving described hydraulic jack.
9. utilize the test unit of test anchor pole as claimed in claim 1 or anchor cable and Concrete Bond Strength to carry out a laboratory testing method for anchor pole or anchor cable and Concrete Bond Strength, it is characterized in that, comprise the steps:
S1: test specimen is made and maintenance: first plug anchor pole or anchor cable in the middle of sleeve, one end of described anchor pole or anchor cable is through the pilot hole of sleeve bottom, keep anchor pole or anchor cable placed in the middle, then in sleeve, fill up the good concrete of mixing in advance, and be placed in vibration compacting on shaking table, then the test specimen after, concrete initial set complete by vibrating is placed in mark and supports indoor maintenance a period of time, after the concrete in sleeve solidifies completely, finally makes standard specimen;
S2: test specimen is installed: the external part of anchor pole or anchor cable is connected with the link of described draw-off gear, after fixing, prepares to read pulling force;
S3: drawing test specimen: utilize described draw-off gear to described anchor pole or the reinforcing of anchor cable continuous uniform, observe the variation of the pulling force registration showing on described draw-off gear, until test specimen is pulled out simultaneously;
S4: reading: when pulling force no longer changes, test specimen is while being extracted completely, stops the application of force, finally records drawing load, single test is complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410214882.1A CN103969183B (en) | 2014-05-20 | 2014-05-20 | The assay device and method of test anchor pole or anchor cable and Concrete Bond Strength |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410214882.1A CN103969183B (en) | 2014-05-20 | 2014-05-20 | The assay device and method of test anchor pole or anchor cable and Concrete Bond Strength |
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| CN103969183A true CN103969183A (en) | 2014-08-06 |
| CN103969183B CN103969183B (en) | 2017-04-05 |
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Cited By (10)
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| CN104655562A (en) * | 2015-02-14 | 2015-05-27 | 广州发展环保建材有限公司 | Method for testing pull-breaking value of bonding strength of autoclaved aerated concrete interface material |
| CN104897566A (en) * | 2015-06-11 | 2015-09-09 | 安庆市德创机电产品设计有限公司 | Positioning detection device for combination degree between protective sleeve and terminal |
| CN107620387A (en) * | 2016-07-15 | 2018-01-23 | 上海宝冶工程技术有限公司 | The detection method of assembled architecture component branch sleeve internal flaw |
| CN107817168A (en) * | 2017-08-28 | 2018-03-20 | 北京工业大学 | The reduction coefficient measurement apparatus and measuring method of concrete blinding lateral pressure |
| CN108982183A (en) * | 2018-08-07 | 2018-12-11 | 宁波联城住工科技有限公司 | A kind of preparation method and test method, mold of concrete sample |
| CN109187341A (en) * | 2018-10-23 | 2019-01-11 | 厦门建研建筑产业研究有限公司 | A kind of anti-method for beating stone material adhesion strength of sample detection exterior finish |
| CN109406389A (en) * | 2018-10-09 | 2019-03-01 | 南京林业大学 | Mud cake bond strength test device and test method on shield model test cutterhead |
| CN109959606A (en) * | 2019-04-29 | 2019-07-02 | 中国水利水电第十二工程局有限公司 | The device of on-site test gunite concrete and country rock bonding strength test |
| CN110411828A (en) * | 2019-07-17 | 2019-11-05 | 长沙理工大学 | Fiber based on drawing stand-concrete drawing experimental rig and its application method |
| CN114136877A (en) * | 2021-12-10 | 2022-03-04 | 成都理工大学 | Device and method for monitoring cementing strength of cement paste for anchor cable |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655562A (en) * | 2015-02-14 | 2015-05-27 | 广州发展环保建材有限公司 | Method for testing pull-breaking value of bonding strength of autoclaved aerated concrete interface material |
| CN104897566A (en) * | 2015-06-11 | 2015-09-09 | 安庆市德创机电产品设计有限公司 | Positioning detection device for combination degree between protective sleeve and terminal |
| CN107620387B (en) * | 2016-07-15 | 2020-04-10 | 上海宝冶工程技术有限公司 | Method for detecting internal defects of connecting sleeve of assembly type building component |
| CN107620387A (en) * | 2016-07-15 | 2018-01-23 | 上海宝冶工程技术有限公司 | The detection method of assembled architecture component branch sleeve internal flaw |
| CN107817168A (en) * | 2017-08-28 | 2018-03-20 | 北京工业大学 | The reduction coefficient measurement apparatus and measuring method of concrete blinding lateral pressure |
| CN107817168B (en) * | 2017-08-28 | 2020-09-04 | 北京工业大学 | Concrete formwork side pressure reduction coefficient measuring device and measuring method |
| CN108982183A (en) * | 2018-08-07 | 2018-12-11 | 宁波联城住工科技有限公司 | A kind of preparation method and test method, mold of concrete sample |
| CN109406389A (en) * | 2018-10-09 | 2019-03-01 | 南京林业大学 | Mud cake bond strength test device and test method on shield model test cutterhead |
| CN109187341A (en) * | 2018-10-23 | 2019-01-11 | 厦门建研建筑产业研究有限公司 | A kind of anti-method for beating stone material adhesion strength of sample detection exterior finish |
| CN109959606A (en) * | 2019-04-29 | 2019-07-02 | 中国水利水电第十二工程局有限公司 | The device of on-site test gunite concrete and country rock bonding strength test |
| CN110411828A (en) * | 2019-07-17 | 2019-11-05 | 长沙理工大学 | Fiber based on drawing stand-concrete drawing experimental rig and its application method |
| CN110411828B (en) * | 2019-07-17 | 2022-03-25 | 长沙理工大学 | Using method of fiber-concrete drawing test device based on drawing bench |
| CN114136877A (en) * | 2021-12-10 | 2022-03-04 | 成都理工大学 | Device and method for monitoring cementing strength of cement paste for anchor cable |
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| CN103969183B (en) | 2017-04-05 |
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Free format text: CORRECT: INVENTOR; FROM: FANG SHULIN KANG HONGPU WU YONGZHENG WU ZHIGANG CAI JIAFANG TO: FANG SHULIN KANG HONGPU WU YONGZHENG WU ZHIGANG CAI JIAFANG TAN GUOQIANG ZHANG CHENGJUN LEI XUEYI LI YINGFEI Free format text: CORRECT: ADDRESS; FROM: 100013 CHAOYANG, BEIJING TO: 839003 HAMI, XINJIANG UYGUR AUTONOMOUS REGION |
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Effective date of registration: 20150126 Address after: 839003 No. 1 South Renmin Road, three Ling mining area, the Xinjiang Uygur Autonomous Region, Hami Applicant after: Lu'an Xinjiang coal chemical industry (Group) Co., Ltd. Applicant after: Tiandi Science & Technology Co., Ltd. Address before: 100013 Chaoyang District, Hepingli Youth Ditch Road, No. 5, No. Applicant before: Tiandi Science & Technology Co., Ltd. |
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