CN102704970A - Pre-stressed anchor rod for underground engineering model test and operation method for pre-stressed anchor rod - Google Patents
Pre-stressed anchor rod for underground engineering model test and operation method for pre-stressed anchor rod Download PDFInfo
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- CN102704970A CN102704970A CN2012102210471A CN201210221047A CN102704970A CN 102704970 A CN102704970 A CN 102704970A CN 2012102210471 A CN2012102210471 A CN 2012102210471A CN 201210221047 A CN201210221047 A CN 201210221047A CN 102704970 A CN102704970 A CN 102704970A
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Abstract
The invention discloses a pre-stressed anchor rod for an underground engineering model test. The pre-stressed anchor rod comprises a rod body, trays, a spring and a nut, wherein the two trays and the nut are sleeved on the rod body in sequence; and the spring is also sleeved on the rod body and arranged between the two trays. The invention also discloses an operation method for the pre-stressed anchor rod for the underground engineering model test. The operation method comprises three steps including drilling, installing the anchor rod and applying pre-stress. By the pre-stressed anchor rod. the problem of simulation of the pre-stressed anchor rod in the model test is solved, and the pre-stressed anchor rod has the advantages that (1), the manufacturing is simple and the cost is low; (2), the dimension of the anchor rod and the pre-stress are adjustable, so as to satisfy various similarity ratio requirements of the model test; (3), and the pre-stressed anchor rod can be widely used for geomechnical model test research in such underground engineering fields as water conservancy, traffic, mine and the like.
Description
Technical field
The present invention relates to a kind of geomechanical model testing technology, relate in particular to a kind of underground project model test with prestressed anchor and execute the method for work.
Background technology
Geomechanical model test is to convert actual engineering into the indoor model simulation that makes an experiment according to the theory of similarity; It helps outstanding principal contradiction in the process of the test of complicacy; Be convenient to hold, find the inner link of phenomenon; Wherein, underground project model test is that underground constructions such as tunnel, coal road are carried out analogue simulation, instructs a kind of effective ways and the means of underground construction design and construction.In underground project model test; Behind the cavern excavation; The supporting that needs the simulation cavern is like the simulation bolt support, but model testing also lacks effective means for the prestressed anchor of simulating in the actual engineering especially with the making of anchor pole with execute the prematurity still of work technology at present; Be difficult to truly reflect the support action of prestressed anchor in the actual engineering in the model testing, reduced the accuracy of model testing.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of effective underground project model test with prestressed anchor and execute the method for work, to solve the problem of modelling of prestressed anchor in the model testing.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
A kind of underground project model test is used prestressed anchor, comprises the body of rod, pallet, spring, nut; Said pallet is two, and pallet and nut are enclosed within on the body of rod successively, and spring also is enclosed within on the body of rod, is between two pallets.
The said body of rod is a metallic rod body, and it confirms size according to the similar guide of model testing and than selection material.
The body of rod one end is provided with and the corresponding screw thread of nut, scribbles cementing agent at the body of rod other end, said cementing agent can the bond body of rod and model body.
A kind of underground project model test may further comprise the steps with the method for work of executing of prestressed anchor:
(1) boring.Anchor pole position, location then according to the bolthole projected depth, utilizes miniature pneumatic drill on model body, to hole;
(2) skyhook.Prefabricated anchor pole is inserted in the boring, and keep the anchor pole transfixion, produce anchored force until anchor rod anchored end and model body bonding;
(3) apply prestressing force.After the anchor pole installation, according to the relation rotation n ring nut of spring force and nut rotating cycle, thereby promote the pallet extrusion spring, this moment, spring produced elastic force owing to compressing, thereby stretching anchor rod makes it produce prestressing force and reaches design load.Wherein, anchor pole design prestressing force size equals the elastic force size that spring produces, and the relation of itself and nut rotating cycle is:
F=K×L；
In the formula, F designs prestressing force for anchor pole, and K is a spring rate, the displacement when L is nut rotation n circle on anchor pole, n >=0.
The invention solves the problem of prestressed anchor simulation in the model testing, have following beneficial effect:
(1) make simply, cost is low, can satisfy model testing and produce the requirement of using in batches;
(2) through change rod body material with and length and diameter, can regulate model prestressed anchor size arbitrarily, can satisfy the requirement of the various likelihoods ratio of model testing, thereby make model testing anchor pole and actual Engineering anchor rod corresponding one by one.
(3) through selecting spring rate and length, can control the prestressing force magnitude range of model prestressed anchor, can satisfy the requirement of the various likelihoods ratio of model testing, truly reflect the prestressing force effect of actual Engineering anchor rod.
(4) this invention can be widely used in the geomechanical model test research of underground engineering field such as water conservancy, traffic, mine.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention.
Fig. 2 is a use sketch map of the present invention.
Marginal data: 1-body of rod; 2-pallet; 3-spring; 4-nut; 5-cementing agent; 6-boring; 7-model body.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is explained further details.
Among Fig. 1, the underground project model test of present embodiment is used prestressed anchor, comprises the body of rod 1, pallet 2, spring 3, nut 4; Said pallet 2 is two, and pallet 2 is enclosed within on the body of rod 1 with nut 4 successively, and spring 3 also is enclosed within on the body of rod 1, is between two pallets 2; The said body of rod 1 is a metallic rod body, and it confirms size according to the similar guide of model testing and than selection material; The said body of rod 1 one ends are provided with and nut 4 corresponding screw threads, scribble cementing agent 5 at the body of rod 1 other end, said cementing agent 5 can bond the fast body of rod 1 and model body 7.
A kind of underground project model test may further comprise the steps with the method for work of executing of prestressed anchor:
(1) boring.Anchor pole position, location then according to the bolthole projected depth, utilizes miniature pneumatic drill on model body 7, to hole;
(2) skyhook.Prefabricated anchor pole is inserted in the boring 6, and keep the anchor pole transfixion, produce anchored force until anchor rod anchored end and model body 7 bondings;
(3) apply prestressing force.After the anchor pole installation, according to the relation rotation n ring nut 4 of spring 3 elastic force and nut 4 rotating cycles, thereby promote pallet 2 extrusion springs 3, spring 3 produces elastic force owing to compressing at this moment, thereby stretching anchor rod makes it produce prestressing force and reaches design load.Wherein, anchor pole design prestressing force size equals the elastic force size that spring 3 produces, and the relation of itself and nut 4 rotating cycles is: F=K * L;
In the formula, F designs prestressing force for anchor pole, and K is the rigidity of spring 3, the displacement when L is nut 4 rotation n circles on anchor pole, n >=0.
Can know that by technological general knowledge the present invention can realize through other the embodiment that does not break away from its spirit or essential feature.Therefore, with regard to each side, all just illustrating, is not only.All within the scope of the present invention or the change in being equal to scope of the present invention all comprised by the present invention.
Claims (4)
1. a underground project model test is used prestressed anchor, it is characterized in that, comprises the body of rod, pallet, spring, nut; Said pallet is two, and pallet and nut are enclosed within on the body of rod successively, and spring also is enclosed within on the body of rod, is between two pallets.
2. underground project model test as claimed in claim 1 is used prestressed anchor, it is characterized in that, the said body of rod is a metallic rod body, and it confirms size according to the similar guide of model testing and than selection material.
3. underground project model test as claimed in claim 1 is used prestressed anchor, it is characterized in that, the said body of rod one end is provided with and the corresponding screw thread of nut, scribbles cementing agent at the body of rod other end, said cementing agent can the bond body of rod and model body.
4. underground project model test as claimed in claim 1 may further comprise the steps with the method for work of executing of prestressed anchor:
(1) boring; Anchor pole position, location then according to the bolthole projected depth, utilizes miniature pneumatic drill on model body, to hole earlier;
(2) skyhook; Prefabricated anchor pole is inserted in the boring, and keep the anchor pole transfixion, produce anchored force until anchor rod anchored end and model body bonding;
(3) apply prestressing force; After the anchor pole installation, according to the relation rotation n ring nut of spring force and nut rotating cycle, thereby promote the pallet extrusion spring, this moment, spring produced elastic force owing to compressing, thereby stretching anchor rod makes it produce prestressing force and reaches design load; Wherein, anchor pole design prestressing force size equals the elastic force size that spring produces, and the relation of itself and nut rotating cycle is:
F=K×L；
In the formula, F designs prestressing force for anchor pole, and K is a spring rate, the displacement when L is nut rotation n circle on anchor pole, n >=0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210221047.1A CN102704970B (en) | 2012-06-29 | 2012-06-29 | Pre-stressed anchor rod for underground engineering model test and operation method for pre-stressed anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210221047.1A CN102704970B (en) | 2012-06-29 | 2012-06-29 | Pre-stressed anchor rod for underground engineering model test and operation method for pre-stressed anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102704970A true CN102704970A (en) | 2012-10-03 |
| CN102704970B CN102704970B (en) | 2014-10-15 |
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| CN201210221047.1A Expired - Fee Related CN102704970B (en) | 2012-06-29 | 2012-06-29 | Pre-stressed anchor rod for underground engineering model test and operation method for pre-stressed anchor rod |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021421A (en) * | 2015-08-06 | 2015-11-04 | 中国矿业大学(北京) | Coal roadway support physical model experiment method capable of positioning and guiding |
| CN108037012A (en) * | 2017-12-04 | 2018-05-15 | 兰州空间技术物理研究所 | A kind of sensor cable mechanical test simulator suitable for space electric field detection |
| CN109632483A (en) * | 2018-12-24 | 2019-04-16 | 长安大学 | For the application of model test prestressd anchor cable and the device and method of real-time monitoring |
| CN110925000A (en) * | 2019-11-25 | 2020-03-27 | 绍兴文理学院 | Multi-stage yielding large-deformation tray with prestress self-applying function and using method |
| CN111535843A (en) * | 2020-04-25 | 2020-08-14 | 青岛科技大学 | Wax-melting type combined supporting one-step forming device for model test |
| CN114934795A (en) * | 2022-06-17 | 2022-08-23 | 中国矿业大学 | Similar model test anchor rod capable of self-injecting anchoring agent and applying pretightening force |
Citations (6)
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|---|---|---|---|---|
| GB950552A (en) * | 1961-08-22 | 1964-02-26 | William George Burton Mcclean | Improvements in or relating to visual warning devices for indicating loss of tensionin bolts |
| US4062229A (en) * | 1977-02-22 | 1977-12-13 | General Electric Company | Method of testing the integrity of installed rock bolts |
| CN2338489Y (en) * | 1998-10-12 | 1999-09-15 | 张德稳 | Anchoring-bolt having tension indicating means |
| CN2830644Y (en) * | 2004-06-03 | 2006-10-25 | 中国科学院武汉岩土力学研究所 | Controllable prestressed super-strength anchor arm |
| CN201981537U (en) * | 2010-12-28 | 2011-09-21 | 中国科学院武汉岩土力学研究所 | Water expansion type elastic anchor rod for resisting rock burst |
| CN202690095U (en) * | 2012-06-29 | 2013-01-23 | 山东大学 | Pre-stress anchor rod for underground engineering model test |
-
2012
- 2012-06-29 CN CN201210221047.1A patent/CN102704970B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB950552A (en) * | 1961-08-22 | 1964-02-26 | William George Burton Mcclean | Improvements in or relating to visual warning devices for indicating loss of tensionin bolts |
| US4062229A (en) * | 1977-02-22 | 1977-12-13 | General Electric Company | Method of testing the integrity of installed rock bolts |
| CN2338489Y (en) * | 1998-10-12 | 1999-09-15 | 张德稳 | Anchoring-bolt having tension indicating means |
| CN2830644Y (en) * | 2004-06-03 | 2006-10-25 | 中国科学院武汉岩土力学研究所 | Controllable prestressed super-strength anchor arm |
| CN201981537U (en) * | 2010-12-28 | 2011-09-21 | 中国科学院武汉岩土力学研究所 | Water expansion type elastic anchor rod for resisting rock burst |
| CN202690095U (en) * | 2012-06-29 | 2013-01-23 | 山东大学 | Pre-stress anchor rod for underground engineering model test |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021421A (en) * | 2015-08-06 | 2015-11-04 | 中国矿业大学(北京) | Coal roadway support physical model experiment method capable of positioning and guiding |
| CN105021421B (en) * | 2015-08-06 | 2018-04-03 | 中国矿业大学(北京) | A kind of coal roadway support physical model experiment method of energy positioning and guiding |
| CN108037012A (en) * | 2017-12-04 | 2018-05-15 | 兰州空间技术物理研究所 | A kind of sensor cable mechanical test simulator suitable for space electric field detection |
| CN109632483A (en) * | 2018-12-24 | 2019-04-16 | 长安大学 | For the application of model test prestressd anchor cable and the device and method of real-time monitoring |
| CN110925000A (en) * | 2019-11-25 | 2020-03-27 | 绍兴文理学院 | Multi-stage yielding large-deformation tray with prestress self-applying function and using method |
| CN110925000B (en) * | 2019-11-25 | 2021-03-16 | 绍兴文理学院 | Multi-stage yielding large-deformation tray with prestress self-applying function and using method |
| CN111535843A (en) * | 2020-04-25 | 2020-08-14 | 青岛科技大学 | Wax-melting type combined supporting one-step forming device for model test |
| CN114934795A (en) * | 2022-06-17 | 2022-08-23 | 中国矿业大学 | Similar model test anchor rod capable of self-injecting anchoring agent and applying pretightening force |
| CN114934795B (en) * | 2022-06-17 | 2023-12-12 | 中国矿业大学 | Similar model test anchor rod capable of self-injecting anchoring agent and applying pretightening force |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102704970B (en) | 2014-10-15 |
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