CN102706733A - Guide bracket of concrete core sample extraction instrument - Google Patents
Guide bracket of concrete core sample extraction instrument Download PDFInfo
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- CN102706733A CN102706733A CN2012101878599A CN201210187859A CN102706733A CN 102706733 A CN102706733 A CN 102706733A CN 2012101878599 A CN2012101878599 A CN 2012101878599A CN 201210187859 A CN201210187859 A CN 201210187859A CN 102706733 A CN102706733 A CN 102706733A
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- core sample
- concrete
- concrete core
- guide bracket
- cylindrical shell
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a guide bracket of a concrete core sample extraction instrument. The guide bracket is characterized by consisting of a cylinder body (1d) and an end cover (1b) connected to one end of the cylinder body; a supporting positioning ring (1c) is arranged on the outer cylindrical surface of the cylinder body (1d), a guide sleeve (1a) is arranged in the center f the end cover (1b), a guide hole (1h) is formed in the guide sleeve, and a conical hole (1f) is formed in the cylinder body (1d). The guide bracket is put into an annular groove (6) drilled by a special drilling machine, so that the axial force of the concrete core sample extraction instrument in a drilling tensile method can be applied in the axis direction of a core sample, and the problem that the axial force is difficult to apply in the process of testing the tensile strength of a concrete axis on a structural solid body is solved.
Description
Technical field
The present invention relates to the device of on-the-spot test concrete tensile strength, particularly a kind of concrete core sample is extracted the appearance guiding trestle.
Background technology
The test of structural concrete compressive strength is very ripe at present both at home and abroad; A lot of corresponding technical standard have also been worked out; But concrete axial tensile strength for new construction design, old building thing transform with reinforce often even more important, as the checking computations structural concrete whether ftracture, fracture width etc.
Still there are not the directly instrument and the method for test concrete tensile strength on structural solid at present both at home and abroad; Have in the standard a kind of in testing laboratory the production standard test specimen be placed on the universal testing machine; Do the method for axle center tensile test; The shortcoming of this method is that to make test specimen inconvenient, and test value can not intuitively reflect the situation of engineering entity, with structural solid certain difference is arranged; Especially for existing building and bond between fresh and hardened concretes situation, because of can not get its tensile strength by the production standard test specimen.Have a kind of method can the concrete split tensile strength of test structure in the standard, be converted into concrete axial tensile strength then, but conversion itself is exactly data by rule of thumb, accuracy be difficult to guarantee.The researchist is devoted to utilize the brill daraf(reciprocal of farad) to carry out the test of on-the-spot axial tensile strength always, but how to guarantee axially to apply does not also solve all the time.
Summary of the invention
The object of the invention is exactly to be difficult to guarantee the shortcoming axially executed when solving the test of existing axial tensile strength, and a kind of concrete core sample that provides is extracted the appearance guiding trestle, is used for solving the problem that applies of boring the daraf(reciprocal of farad) axial force.
The present invention has taked following technical scheme:
A kind of concrete core sample is extracted the appearance guiding trestle, it is characterized in that it is made up of cylindrical shell and the end cap that is connected in cylindrical shell one end, and the cylindrical shell external cylindrical surface is provided with the support locating ring one, and the end cap center is provided with an orienting sleeve, is provided with pilot hole in the orienting sleeve.
On the basis of technique scheme, following further technical scheme is arranged:
The cylindrical shell internal control is provided with one section bellmouth.
The present invention has following beneficial effect: when having realized at the scene on the structural solid test concrete axial tensile strength, and accurately the applying of axial force, thus guaranteed the accuracy of test data.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is that the present invention and concrete core sample are extracted appearance and be used constitutional diagram.
Embodiment
As shown in Figure 1; A kind of concrete core sample provided by the invention is extracted the appearance guiding trestle; It is characterized in that it is made up of cylindrical shell 1d and the end cap 1b that is connected in cylindrical shell one end; Cylindrical shell 1d external cylindrical surface is provided with one and supports locating ring 1c, and end cap 1b center is provided with an orienting sleeve 1a, is provided with pilot hole 1h in the orienting sleeve.Cylindrical shell 1d internal control is provided with one section bellmouth 1f.
As shown in Figure 2 is the present invention and concrete core sample extracted appearance and is used state,
Use rig on structural concrete, to get out the core 5 of diameter, keep core to link to each other with structure parent concrete as 80mm～110mm, degree of depth 160mm～220mm.Form circumferential groove 6 between core and structure parent; Guarantee that circumferential groove 6 degree of depth are greater than guiding trestle cylindrical shell 1a length; Cylindrical shell 1a outer wall cooperates closely with circumferential groove, and can guarantee that cylindrical shell 1a can insert in the circumferential groove, and cylindrical shell 1a endoporus is provided with bellmouth 1f; Do not contact with the core outer wall, the gap of 2mm～3mm is arranged approximately.
Guiding trestle is put into circumferential groove 6, owing to cylindrical shell 1a outer wall cooperates closely with circumferential groove, so the axis coinciding of the axle center of orienting sleeve 1a and core.And support locating ring 1c with vertical to cover 1a, so no matter the structural concrete surface whether with the core axis normal, can both guarantee to support end face and core axis normal.
Connect universal drawing bar 2 on the reaction frame 3, extract pulling out of appearance and 4 be connected with the pulling block of core 5 ends, universal drawing bar 2 with pull out 4 and be connected and passed certain thickness pull bar pilot hole 1h, the axial property of the axial force that has further guaranteed to apply.
Claims (2)
1. a concrete core sample is extracted the appearance guiding trestle; It is characterized in that: it is made up of cylindrical shell (1d) and the end cap (1b) that is connected in cylindrical shell one end; Cylindrical shell (1d) external cylindrical surface is provided with one and supports locating ring (1c); End cap (1b) center is provided with an orienting sleeve (1a), is provided with pilot hole (1h) in the orienting sleeve.
2. a kind of concrete core sample according to claim 1 is extracted the appearance guiding trestle, it is characterized in that: cylindrical shell (1d) internal control is provided with one section bellmouth (1f).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101878599A CN102706733A (en) | 2012-06-08 | 2012-06-08 | Guide bracket of concrete core sample extraction instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101878599A CN102706733A (en) | 2012-06-08 | 2012-06-08 | Guide bracket of concrete core sample extraction instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102706733A true CN102706733A (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101878599A Pending CN102706733A (en) | 2012-06-08 | 2012-06-08 | Guide bracket of concrete core sample extraction instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN102706733A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149148A (en) * | 2013-02-22 | 2013-06-12 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Bonding strength tester of concrete carbonation protective layer |
| CN107907367A (en) * | 2018-01-06 | 2018-04-13 | 广东逸华交通工程检测有限公司 | A kind of old pavement core boring sampling cylinder equipped with thrustor |
| CN112051149A (en) * | 2020-09-25 | 2020-12-08 | 新疆生产建设兵团建筑工程科学技术研究院有限责任公司 | Top-pulling type detection method for concrete strength |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2081533U (en) * | 1990-12-01 | 1991-07-24 | 中国建筑第一工程局建筑科学研究所 | Electric draw-off instrument for concrete drawing test |
| CN201575955U (en) * | 2009-12-30 | 2010-09-08 | 广东省建筑科学研究院 | Testing system used for drawing inspection tests on lifting hooks |
| CN202256049U (en) * | 2011-08-03 | 2012-05-30 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Guiding device of drawing apparatus |
| CN202599747U (en) * | 2012-06-08 | 2012-12-12 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Guide support for concrete core sample extractor |
-
2012
- 2012-06-08 CN CN2012101878599A patent/CN102706733A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2081533U (en) * | 1990-12-01 | 1991-07-24 | 中国建筑第一工程局建筑科学研究所 | Electric draw-off instrument for concrete drawing test |
| CN201575955U (en) * | 2009-12-30 | 2010-09-08 | 广东省建筑科学研究院 | Testing system used for drawing inspection tests on lifting hooks |
| CN202256049U (en) * | 2011-08-03 | 2012-05-30 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Guiding device of drawing apparatus |
| CN202599747U (en) * | 2012-06-08 | 2012-12-12 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Guide support for concrete core sample extractor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149148A (en) * | 2013-02-22 | 2013-06-12 | 安徽省（水利部淮河水利委员会）水利科学研究院 | Bonding strength tester of concrete carbonation protective layer |
| CN107907367A (en) * | 2018-01-06 | 2018-04-13 | 广东逸华交通工程检测有限公司 | A kind of old pavement core boring sampling cylinder equipped with thrustor |
| CN112051149A (en) * | 2020-09-25 | 2020-12-08 | 新疆生产建设兵团建筑工程科学技术研究院有限责任公司 | Top-pulling type detection method for concrete strength |
| CN112051149B (en) * | 2020-09-25 | 2022-12-02 | 新疆生产建设兵团建筑工程科学技术研究院有限责任公司 | Top-pulling type detection method for concrete strength |
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Application publication date: 20121003 |