CN201247115Y - Minitype pre-stress anchorage cable for model experiment - Google Patents
Minitype pre-stress anchorage cable for model experiment Download PDFInfo
- Publication number
- CN201247115Y CN201247115Y CNU2008201877398U CN200820187739U CN201247115Y CN 201247115 Y CN201247115 Y CN 201247115Y CN U2008201877398 U CNU2008201877398 U CN U2008201877398U CN 200820187739 U CN200820187739 U CN 200820187739U CN 201247115 Y CN201247115 Y CN 201247115Y
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- steel strand
- anchorage cable
- anchor cable
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Abstract
The utility model relates to a mini-type prestressed anchorage cable for model tests, which comprises an adjusting bolt and a steel strand, wherein a nut of the adjusting bolt is fixed on the chamber side wall, a bolt is screwed in the nut as an anchorage cable head together, the steel strand is threaded through the bolt and is fixed on a bolt head through a thin section, and the other end of the steel strand is connected with a spring which is arranged in an inner anchorage section in models. The utility model has the following advantages that firstly, the model prestressed anchorage cable size can be adjusted arbitrarily through changing the length of the steel strand and the spring, and the similarity rate requirements of the model tests are satisfied, secondly, the prestressed range of the model prestressed anchorage cable can be controlled to satisfy requirements of the model tests through selecting the spring rigidity, thirdly, the prestressing force of the model anchorage cable can be conveniently and accurately regulated and controlled, the anchorage cable can be used under worse working conditions, fourthly, the anchorage cable can be applied in rock-soil geomechanics model test research of the engineering fields such as water conservancy, traffic, energy resources, mines and the like.
Description
Technical field
The utility model relates to the supporting ground tackle of the geomechanical model test of underground workss such as a kind of tunnel, subway, underground power house, especially a kind of miniature pre-stress anchor wire of the geomechanical model test that is used for underground works and burying underground and loading method.
Background technology
Model test based on similarity theory originates from the 17th century, and the development of process several centuries and perfect to the seventies in 20th century, has obtained unprecedented development and application widely, and its application almost relates to all subjects of scientific research.The underground chamber model test originates in this period just, mainly is owing to the scale of some underground chambers in the engineerings such as traffic, water power is increasing, need conscientiously study the stability of its country rock.This needs have effectively promoted the development of underground chamber model test; Conversely, the underground chamber model test has solved the many insoluble at that time problem in the engineering reality, has promoted the construction of large underground hole engineering.At home, the underground chamber model test starts from initial stage eighties phase late 1970s, also is that the needs owing to engineering construction grow up.Carry out geomechanical model test, corresponding model anchor will be arranged, therefore, below at first once with the anchor cable device simple declaration of more domestic main geomechanical model tests:
(1) rock mechanics and engineering journal (2007, the 26th phase) have been introduced a kind of anchor cable system of being made up of bolt and copper wire, and this device is controlled the size of anchor cable pulling force by the process of bolt.The subject matter of its existence is: the elastic modulus of anchor cable material can not be regulated arbitrarily, it is very difficult finding in strict conformity with the model anchor cable material of likelihood requirement, need in model test synthetic one of many anchor cables in the actual engineering, the anchor cable that can not simulate accurately in the actual engineering distributes; In the bigger model test of likelihood, be difficult to use; Control to model anchor cable pulling force is also accurate inadequately.
(2) Chinese highway journal (2004, the 3 phase) has been introduced a kind of anchor cable system of being made up of bolt and rope, and this device is applied to the size that power on the rope is controlled the anchor cable pulling force by pulley-weight system.It applies the method complicated operation of anchor cable pulling force, is difficult to use in the model test cavern excavation.
(3) underground space (2006, the 6 phase) has been introduced a kind of anchor cable system of being made up of bolt and steel strand wires, and this device is controlled the size of anchor cable pulling force by lifting jack.It applies the method complicated operation of anchor cable pulling force, is difficult to use in the model test cavern excavation.
Above-mentioned test unit and the following shortcoming of loading system ubiquity:
(1) selected anchor cable material stiffness is more fixing, can not satisfy the requirement of various likelihoods.
(2) find in strict conformity with the anchor cable material of cast material elastic modulus likelihood very difficultly, need in model test synthetic one of many anchor cables in the actual engineering, the anchor cable that can not simulate accurately in the actual engineering distributes; In the bigger model test of likelihood, be difficult to use.
(3) selected anchor cable material stiffness is general bigger, and under the bigger situation of model test likelihood, the rigidity of anchor cable can not satisfy.
(4) anchor cable loading method more complicated can not satisfy the working condition requirement of constructing in the model test cavern.
The utility model content
The utility model is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of and can satisfy various model test working condition requirements, make anchor cable radical in the model test and position can with actual engineering in corresponding one by one, size can be as far as possible little, it is big also can to try one's best, and the prestressed loading method of anchor cable is used for the miniature pre-stress anchor wire of model test simply accurately and buries underground and loading method.
The purpose of this utility model is to adopt following technical proposals to realize: a kind of miniature pre-stress anchor wire that is used for model test, and comprise and regulate bolt, steel strand wires, the nut of regulating bolt is fixed on cavern's abutment wall, and bolt screws in the nut, jointly as the anchor cable head; Steel strand wires pass bolt, and are fixed on the bolt head by a thin slice.The other end of steel strand wires is connected with spring in the interior anchoring section of being located at model the inside.
Described bolt is provided with axially extending bore.
Anchoring section is made up of a closed system that is surrounded by spring in described, closed system comprises housing, screw, and the two ends of housing seal by screw, is provided with spring in the housing, one end of spring is fixedlyed connected with one of them screw, and the other end is connected with the steel strand wires that pass another screw.
Described screw is provided with axially extending bore.
The utlity model has following advantage:
(1) by changing the length of steel strand wires and spring, can regulate model prestress anchorage cable size arbitrarily, the length minimum can be accomplished 1cm, can maximum possible satisfy anchor cable requirement one to one in model test anchor cable and the actual engineering, satisfy the requirement of model test likelihood.
(2) by selecting spring rate, prestress scope that can the controlling models prestress anchorage cable, can maximum possible satisfy anchor cable requirement one to one in model test anchor cable and the actual engineering, satisfy the various likelihood requirements of model test.
(3) the prestressed control of model anchor cable is convenient, accurate, can use under more abominable operating mode.
(4) this system can be widely used in the ground geomechanical model test research in engineering fields such as water conservancy, traffic, the energy, mine.
Description of drawings
Fig. 1 is the utility model structural representation;
1. thin slices wherein, 2. bolt, 3. nut, 4. steel strand wires, 5. screw, 6. in anchoring section, 7. spring, 8. housing.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Among Fig. 1, the nut 3 of regulating bolt 2 is fixed on cavern's abutment wall, bolt 2 screws in the nut 3, jointly as the anchor cable head, steel strand wires 4 pass the bolt 2 of band through hole, and be fixed on 2 on the bolt by a flakelet 1, the other end of steel strand wires 4 is connected with the spring 7 of 6 li of the interior anchoring sections of being located at the model the inside.
This model anchor cable total length 24cm (length can free adjustment), the pattern that adopts thin steel strand wires 4 to connect with spring 7, steel strand wires 4 satisfy the requirement of model test anchor cable pulling force with the maximum pull of spring 7.The interior anchoring section 6 of model anchor cable is made up of a closed system that is surrounded by spring 7, is embedded in the model the inside, and on the anchoring section 6, the other end connected thin steel strand wires 4 in an end of spring 7 was fixed on.The adjusting bolt 2 that the anchor cable head of cavern's abutment wall adopts size to calculate according to likelihood, the nut 3 of regulating bolt 2 is fixed on the abutment wall, bolt with holes 2 is screwed in the nut 3, jointly as the anchor cable head again.Thin steel strand wires 4 pass bolt with holes 2, and are fixed on 2 on the bolt with a flakelet 1.Pre-buried anchor cable is required to be embedded in the prefabricated model block according to modelling, and the interior anchoring section 6 and the cast material of anchor cable are put into mould simultaneously, by the controlled pressure machine pressure and the dwell time compaction model material position of reserving anchoring section.The block that is embedded with pre-buried anchor cable is installed in the model according to arrangement and method for construction.In the cavern excavation process of model test, excavate the anchor cable head the time, swivel bolt makes anchor cable reach just strong state, according to the swivel bolt that concerns of anchor cable pulling force and bolt rotating cycle, makes anchor cable prestress reach designing requirement again.
The technical requirement of this model anchor cable:
(1) model anchor cable Design of length
According to similarity theory, the anchor cable length that model experiment is used
l′＝l/c (1)
In the formula (1), 1 ' be model anchor cable length, l is actual anchor cable length, c is the geometric similarity rate of model test and actual engineering.
(2) prestress of model anchor cable design
According to similarity theory, the anchor cable prestress that model test is used is:
f′＝f/c (2)
In the formula (2), f ' is the prestress of model anchor cable, and f is the prestress of actual anchor cable, and c is the physical similarity rate of model test and actual engineering.
(3) the prestressed loading of model anchor cable.
According to the prestress of the model test anchor cable that calculates in the formula (2), choose the spring of corresponding rigidity, demarcate bolt revolves bolt when turning around in nut process, pass through formula:
F＝K×X (3)
Can calculate bolt and revolve the pulling force that anchor cable when turning around produces, in the formula (3), F is the prestress of model anchor cable, and K is the rigidity of spring, and X is the process of bolt bolt when rotate n enclosing in nut.In view of the above, can calculate the relation of anchor cable pulling force and bolt rotation, concern by this and carry out the prestressed Loading Control of model anchor cable.
(4) method of operating of model anchor cable prestress loading
In the cavern excavation process of model test, excavate the anchor cable head the time, swivel bolt makes anchor cable reach just strong state, according to the swivel bolt that concerns of anchor cable pulling force and bolt rotating cycle, makes anchor cable prestress reach designing requirement again.
Claims (4)
1. miniature pre-stress anchor wire that is used for model test, comprise and regulate bolt, steel strand wires, it is characterized in that: the nut of regulating bolt is fixed on cavern's abutment wall, bolt screws in the nut, jointly as the anchor cable head, steel strand wires pass bolt, and are fixed on the bolt head by a thin slice, and the other end of steel strand wires is connected with spring in the interior anchoring section of being located at model the inside.
2. the miniature pre-stress anchor wire that is used for model test according to claim 1 is characterized in that: described bolt is provided with axially extending bore.
3. the miniature pre-stress anchor wire that is used for model test according to claim 1, it is characterized in that: anchoring section is made up of a closed system that is surrounded by spring in described, closed system comprises housing, screw, the two ends of housing seal by screw, be provided with spring in the housing, one end of spring is fixedlyed connected with one of them screw, and the other end is connected with the steel strand wires that pass another screw.
4. the miniature pre-stress anchor wire that is used for model test according to claim 3 is characterized in that: described screw is provided with axially extending bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201877398U CN201247115Y (en) | 2008-08-18 | 2008-08-18 | Minitype pre-stress anchorage cable for model experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201877398U CN201247115Y (en) | 2008-08-18 | 2008-08-18 | Minitype pre-stress anchorage cable for model experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201247115Y true CN201247115Y (en) | 2009-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201877398U Expired - Lifetime CN201247115Y (en) | 2008-08-18 | 2008-08-18 | Minitype pre-stress anchorage cable for model experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201247115Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100582390C (en) * | 2008-08-18 | 2010-01-20 | 山东大学 | Miniature pre-stress anchor wire used for model experiment and its burying and loading method |
| CN103063385A (en) * | 2012-12-21 | 2013-04-24 | 北京工业大学 | Device and method for efficiently imitating artificial quality in subsurface structure shaking table test |
| CN103959939A (en) * | 2014-04-29 | 2014-08-06 | 吉林大学 | Press wheel with press force monitoring function |
| CN112857848A (en) * | 2021-01-13 | 2021-05-28 | 中国建设基础设施有限公司 | Shield tunnel model test device and method capable of adjusting and controlling bolt prestress |
-
2008
- 2008-08-18 CN CNU2008201877398U patent/CN201247115Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100582390C (en) * | 2008-08-18 | 2010-01-20 | 山东大学 | Miniature pre-stress anchor wire used for model experiment and its burying and loading method |
| CN103063385A (en) * | 2012-12-21 | 2013-04-24 | 北京工业大学 | Device and method for efficiently imitating artificial quality in subsurface structure shaking table test |
| CN103959939A (en) * | 2014-04-29 | 2014-08-06 | 吉林大学 | Press wheel with press force monitoring function |
| CN103959939B (en) * | 2014-04-29 | 2015-12-02 | 吉林大学 | A kind of press wheel with suppression power monitoring function |
| CN112857848A (en) * | 2021-01-13 | 2021-05-28 | 中国建设基础设施有限公司 | Shield tunnel model test device and method capable of adjusting and controlling bolt prestress |
| CN112857848B (en) * | 2021-01-13 | 2023-03-03 | 中国建设基础设施有限公司 | Shield tunnel model test device and method capable of adjusting and controlling bolt prestress |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080818 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |