CN104499493A - Deformable prestressed anchor pier - Google Patents
Deformable prestressed anchor pier Download PDFInfo
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- CN104499493A CN104499493A CN201510002750.7A CN201510002750A CN104499493A CN 104499493 A CN104499493 A CN 104499493A CN 201510002750 A CN201510002750 A CN 201510002750A CN 104499493 A CN104499493 A CN 104499493A
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- hole
- backing plate
- gear shaping
- plate
- intermediate plate
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a deformable prestressed anchor pier which is simple in structure and convenient to manufacture, and aims at adapting to the change on tension of anchor ropes as well as preventing the anchor rope from failure caused by the breaking of a steel strand due to the increase deformation of the surrounding rock or side slope. According to the technical scheme, the deformable prestressed anchor pier comprises a convex cushion board and a concave cushion board; the convex cushion board comprises a bearing plate; a through hole I through which the anchor rope passes is formed in the center of the bearing plate; a plurality of inserting teeth which are vertical to the bearing plate are uniformly fixed in one side of the bearing plate and around the through hole I; the concave cushion board comprises a supporting plate; a through hole II through which the anchor rope passes is formed in the center of the supporting plate; a plurality of clamping sheet groups, corresponding to the inserting teeth on the convex cushion board in the positions, are arranged at one side of the supporting plate and around the through hole II; each clamping sheet set comprises two clamping sheets which are arranged in parallel with each other and are vertical to the supporting plate; the inserting teeth are inserted between every two clamping sheets of the corresponding clamping sheet sets and are in tight fit with the clamping sheet sets by a connecting manner.
Description
Technical field
The present invention relates to a kind of deformable prestressing force anchor pier.Be applicable in underground chamber or the support engineering such as side slope, foundation ditch, in order to replace traditional prestressing force anchor pier.
Background technology
In the support engineering of underground chamber or side slope, foundation ditch etc., prestressing anchor support, as ensureing the important means that underground chamber or side slope, foundation ditch are stable, is widely used in underground construction.The Main Function of prestress anchorage cable reinforces underground chamber or side slope, foundation ditch etc. by suspention, precompressed country rock, makes engineering reach homeostasis.
Traditional prestressing force anchor pier is fixed structure, but the reasons such as geostatic stress adjustment are caused due to construction and excavation, cavern or side slope face can deform toward free face, thus cause anchor cable steel strand to extend, anchor cable stress increases, and even can exceed the ultimate tensile strength of anchor cable steel strand, cause steel strand to rupture under extreme case, make failure of cable, consequence is very serious.
The measure of reserved stretch-draw intensity is generally have employed in current anchorage cable design and construction, this considers the ability of the adaptive deformation of anchor cable to a certain extent, but in the process of stage excavation afterwards, country rock progressively Unloading Deformation, anchor cable stress also progressively strengthens thereupon.Initial tension tonnage is too high, and the later stage progressively strengthens along with stress, and anchor cable stress is by overload or even reach destruction.Initial tension tonnage is too low, then effectively can not play the performance of material, need increase a large amount of anchor cables, not only increase investment, also increase the construction period, and therefore, the value of initial stretch-draw intensity needs to carry out case study and determines.In addition, because the excavation initial stage reduces supporting intensity, can not well play the support action of anchor cable at the excavation initial stage.
Summary of the invention
The technical problem to be solved in the present invention is: for above-mentioned Problems existing, the deformable prestressing force anchor pier that a kind of structure is simple, easily manufactured is provided, to adapt to anchorage cable stretching change, avoid causing steel strand to rupture the failure of cable caused because country rock or slope deforming increase.
The technical solution adopted in the present invention is: a kind of deformable prestressing force anchor pier, is characterized in that: be made up of male backing plate and female backing plate,
Wherein public backing plate comprises bearing plate, and bearing plate center has the through hole I passed for anchor cable, and evenly fix some gear shapings around this bearing plate side, through hole I, gear shaping is vertical with bearing plate;
Described female backing plate comprises gripper shoe, gripper shoe center has the through hole II passed for anchor cable, on this gripper shoe side, the corresponding public backing plate of through hole II surrounding, some intermediate plate groups are fixed in gear shaping position, and intermediate plate group has two pieces of intermediate plates arranged that are parallel to each other, and intermediate plate is arranged perpendicular to gripper shoe;
Described gear shaping is plugged between two intermediate plates of corresponding intermediate plate group, with intermediate plate group tight fit connection.
Two intermediate plate tops of described intermediate plate group have bolt hole, and described gear shaping has slotted eye, and the vertical bearing plate of this slotted eye length direction is arranged; Described intermediate plate group and gear shaping are fixedly clamped through the bolt attaching nut successively through bolt hole, slotted eye and another bolt hole.
Frictional force sum between each gear shaping and intermediate plate group is the anchorage cable design stretch-draw intensity of 1.0 ~ 1.2 times.
On described public backing plate, gear shaping has 4 ~ 8, is evenly arranged in around through hole I in 360 ° of annulars; Described female backing plate upper clip group number is identical with male backing plate gear shaping number, is also evenly arranged in around through hole II in 360 ° of annulars.
Described gripper shoe evenly has 4 boltholes.
Described gear shaping height is generally 20 ~ 25cm, and intermediate plate height is identical with gear shaping height.
The invention has the beneficial effects as follows: structure of the present invention is simple, easy to make, uniform force, safe and reliable, when anchorage cable stretching power exceedes the frictional force between male backing plate and female backing plate, male backing plate starts to female backing plate direction slippage, anchor cable elongation rate is reduced, thus anchor cable stress is controlled all the time within allowed band, steel strand will be caused to rupture because country rock or slope deforming increase, avoid failure of cable.For making the frictional force between male backing plate and female backing plate meet the demands in the present invention, adopt bolt intermediate plate group and gear shaping to be fixedly clamped, and on gear shaping, have the slotted eye that can supply bolt movement.
Accompanying drawing explanation
Fig. 1 is the stereogram of public backing plate in embodiment.
Fig. 2 is the stereogram of female backing plate in embodiment.
Fig. 3 is anchor pier structure installment sectional drawing in embodiment.
Detailed description of the invention
The present embodiment is a kind of deformable prestressing force anchor pier, by forming along the male backing plate of the axial relative sliding of anchor cable and female backing plate (steel).
As shown in Figure 1, in the present embodiment, public backing plate comprises bearing plate 1, bearing plate 1 center has the through hole I 101 passed for anchor cable, 4 gear shapings 2 are circumferentially evenly fixed around the side of bearing plate, through hole I, arrange in cross, gear shaping is vertical with bearing plate 1, and gear shaping height is generally 20 ~ 25cm.Gear shaping 2 has slotted eye 201, and the vertical bearing plate 1 of this slotted eye length direction is arranged.
As shown in Figure 2, female backing plate comprises gripper shoe 3, gripper shoe 3 evenly has 4 boltholes 6, gripper shoe 3 center has the through hole II 301 passed for anchor cable, 4 intermediate plate groups are fixed around the side of this gripper shoe, through hole II, arrange in cross, gear shaping 2 position one_to_one corresponding on intermediate plate group and public backing plate.In this example, intermediate plate group has two pieces of intermediate plates 4 arranged that are parallel to each other, and intermediate plate 4 is arranged perpendicular to gripper shoe 3, and stay seam in the middle of two intermediate plates of intermediate plate group, gear shaping 2 thickness stitching wide and public backing plate is identical, and intermediate plate height is identical with gear shaping height.Bolt hole 401 is all had on two intermediate plate 4 tops (away from gripper shoe 3 end) of intermediate plate group.
Between two intermediate plates 4 in the present embodiment, the gear shaping 2 of male backing plate being plugged in corresponding intermediate plate group on female backing plate, gear shaping 2 is fixedly clamped through bolt 5 attaching nut successively through bolt hole 401, slotted eye 201 and another bolt hole 401 with intermediate plate group, gear shaping 2 and intermediate plate group tight fit connection.The frictional force sum (total frictional force between male backing plate and female backing plate) guaranteeing between 4 gear shapings 2 and 4 intermediate plate groups is the anchorage cable design stretch-draw intensity of 1.0 ~ 1.2 times.
The concrete using method of the present embodiment is as follows: the present embodiment prestressing force anchor pier does not change the construction technology of traditional prestress anchorage cable substantially, just changes anchor pier structure.As shown in Figure 3, the construction technology of this anchor pier structure comprises the following steps:
(1) complete the construction of the operations such as anchor cable boring, aperture leveling concrete by traditional construction mode, and the slip casting of anchoring section is treated by force;
(2) bolt anchor pole 7 is utilized to be fixed on anchor cable hole 8 mouthfuls of leveling concretes by the bolthole 6 in gripper shoe 3 by female backing plate, require that gripper shoe 3 and anchor cable aperture leveling concrete fit tightly, the through hole II 301 of female backing plate aligns with anchor cable drill center simultaneously;
(3) gear shaping 2 of male backing plate is inserted in the intermediate plate group of female backing plate (require that insertion depth is identical), and with bolt 5 through female backing plate bolt hole 401 and male backing plate gear shaping slotted eye 201, then symmetrical operational manner (employing torque spanner) screwing bolts 5 is one by one pressed, the tightness of bolt 5 is calculated by specialty to be determined, ensures that the total frictional force between male backing plate and female backing plate reaches the anchorage cable design stretch-draw intensity of 1.0 ~ 1.2 times;
(4) on public backing plate bearing plate 1, anchor cable 9 stretch-draw is carried out by traditional construction mode and the working procedure such as anchor cable is fixed, slip casting.
Wherein, step (3) can combine installation in advance at factory floor or job site, only need the prestressing force anchor pier combined to be fixed on the leveling concrete of aperture during construction, then equally carry out anchor cable construction with conventional prestress anchorage cable anchor head structure.
For ensureing that prestressed anchor pier structure is at the job stability of runtime, prevents the erosion of natural environment, after anchor head structure installment completes, protection can be closed by the peripheral steel cage that adopts; And after tending towards stability in cavern or slope deforming, carry out permanent protection to carrying out the means such as concrete perfusion or grouting in prestressed anchor pier structure space.
The operating principle of the present embodiment is as follows:
1, when the ground tackle pressure acted on male backing plate bearing plate 1 of anchor cable is less than or equal to the total frictional force between male backing plate and female backing plate, the relative position of male backing plate and female backing plate will remain unchanged.
2, when the anchor cable pressure acted on male backing plate bearing plate 1 is greater than the total frictional force between male backing plate and female backing plate, public backing plate axially will produce slippage along anchor cable, now anchor cable axle power can reduce because of the reduction of elongation rate, until when the anchor cable pressure acted on male backing plate equals the total frictional force between male backing plate and female backing plate, public backing plate stops slippage, again reaches equilibrium state.
The length range of the rectangular shaped slot 201 of public backing plate gear shaping 2 is effective anchor cable extended length, namely can by customization slotted eye length to adapt to different Deformation Demands.
In the present invention, the gear shaping of anchor pier structure male and female backing plate is not limit quantity, and male backing plate gear shaping and female backing plate intermediate plate number and bolt pretightening, need determine according to anchor cable tonnage, can freely customize under the prerequisite meeting mounting condition.
Claims (6)
1. a deformable prestressing force anchor pier, is characterized in that: be made up of male backing plate and female backing plate,
Wherein public backing plate comprises bearing plate (1), bearing plate (1) center has the through hole I (101) passed for anchor cable, evenly fix some gear shapings (2) around this bearing plate side, through hole I, gear shaping is vertical with bearing plate (1);
Described female backing plate comprises gripper shoe (3), gripper shoe (3) center has the through hole II (301) passed for anchor cable, on this gripper shoe side, the corresponding public backing plate of through hole II surrounding, some intermediate plate groups are fixed in gear shaping (2) position, intermediate plate group has two pieces of intermediate plates (4) arranged that are parallel to each other, and intermediate plate (4) is arranged perpendicular to gripper shoe (3);
Described gear shaping (2) is plugged between two intermediate plates (4) of corresponding intermediate plate group, with intermediate plate group tight fit connection.
2. deformable prestressing force anchor pier according to claim 1, it is characterized in that: two intermediate plates (4) top of described intermediate plate group has bolt hole (401), described gear shaping (2) has slotted eye (201), the vertical bearing plate of this slotted eye length direction is arranged; Described intermediate plate group and gear shaping (2) are fixedly clamped through bolt (5) attaching nut successively through bolt hole (401), slotted eye (201) and another bolt hole (401).
3. deformable prestressing force anchor pier according to claim 1 and 2, is characterized in that: the frictional force sum between each gear shaping (2) and intermediate plate group is the anchorage cable design stretch-draw intensity of 1.0 ~ 1.2 times.
4. deformable prestressing force anchor pier according to claim 1 and 2, is characterized in that: on described public backing plate, gear shaping (2) has 4 ~ 8, is evenly arranged in through hole I (101) around in 360 ° of annulars; Described female backing plate upper clip group number is identical with male backing plate gear shaping number, is also evenly arranged in through hole II (301) around in 360 ° of annulars.
5. deformable prestressing force anchor pier according to claim 1 and 2, is characterized in that: described gripper shoe (3) evenly has 4 boltholes (6).
6. deformable prestressing force anchor pier according to claim 1 and 2, is characterized in that: described gear shaping (2) is highly 20 ~ 25cm, and intermediate plate (4) height is identical with gear shaping height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002750.7A CN104499493B (en) | 2015-01-05 | 2015-01-05 | Deformable prestressing force anchor pier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002750.7A CN104499493B (en) | 2015-01-05 | 2015-01-05 | Deformable prestressing force anchor pier |
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| Publication Number | Publication Date |
|---|---|
| CN104499493A true CN104499493A (en) | 2015-04-08 |
| CN104499493B CN104499493B (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510002750.7A Active CN104499493B (en) | 2015-01-05 | 2015-01-05 | Deformable prestressing force anchor pier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547647A (en) * | 2018-06-22 | 2018-09-18 | 四川大学 | A kind of underground chamber high strength support structure |
| CN114575906A (en) * | 2022-03-12 | 2022-06-03 | 北京工业大学 | Energy dissipation lets presses anchor backing plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU711234A1 (en) * | 1975-10-31 | 1980-01-25 | Всесоюзный Ордена Ленина Проектно- Изыскательский И Научно-Исследовательский Институт "Гидропроект" Им. С.Я.Жука | Ground anchor |
| CN2289830Y (en) * | 1997-03-14 | 1998-09-02 | 中国科学院武汉岩土力学研究所 | Sand consolidation anchor head prestressed rockbolt |
| CN203160240U (en) * | 2013-03-29 | 2013-08-28 | 许年春 | Prestress self-generated and self-adjusted anchor cable anchoring device |
| CN104061010A (en) * | 2014-07-10 | 2014-09-24 | 中国电建集团中南勘测设计研究院有限公司 | Rock anchor rod capable of conducting segmented anchoring |
| CN204456143U (en) * | 2015-01-05 | 2015-07-08 | 中国电建集团华东勘测设计研究院有限公司 | Deformable prestressing force anchor pier |
-
2015
- 2015-01-05 CN CN201510002750.7A patent/CN104499493B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU711234A1 (en) * | 1975-10-31 | 1980-01-25 | Всесоюзный Ордена Ленина Проектно- Изыскательский И Научно-Исследовательский Институт "Гидропроект" Им. С.Я.Жука | Ground anchor |
| CN2289830Y (en) * | 1997-03-14 | 1998-09-02 | 中国科学院武汉岩土力学研究所 | Sand consolidation anchor head prestressed rockbolt |
| CN203160240U (en) * | 2013-03-29 | 2013-08-28 | 许年春 | Prestress self-generated and self-adjusted anchor cable anchoring device |
| CN104061010A (en) * | 2014-07-10 | 2014-09-24 | 中国电建集团中南勘测设计研究院有限公司 | Rock anchor rod capable of conducting segmented anchoring |
| CN204456143U (en) * | 2015-01-05 | 2015-07-08 | 中国电建集团华东勘测设计研究院有限公司 | Deformable prestressing force anchor pier |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547647A (en) * | 2018-06-22 | 2018-09-18 | 四川大学 | A kind of underground chamber high strength support structure |
| CN108547647B (en) * | 2018-06-22 | 2024-05-10 | 四川大学 | High-strength supporting structure for underground cavern |
| CN114575906A (en) * | 2022-03-12 | 2022-06-03 | 北京工业大学 | Energy dissipation lets presses anchor backing plate |
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| Publication number | Publication date |
|---|---|
| CN104499493B (en) | 2016-05-04 |
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