CN211848856U - Clamping type prestressed tendon self-anchoring device - Google Patents
Clamping type prestressed tendon self-anchoring device Download PDFInfo
- Publication number
- CN211848856U CN211848856U CN201922010974.9U CN201922010974U CN211848856U CN 211848856 U CN211848856 U CN 211848856U CN 201922010974 U CN201922010974 U CN 201922010974U CN 211848856 U CN211848856 U CN 211848856U
- Authority
- CN
- China
- Prior art keywords
- anchoring
- pushing
- cavity
- clamping
- tendon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a clamping type prestressed tendon self-anchoring device, which comprises a tendon-penetrating pore passage, an anchoring cavity and a filling cavity which are sequentially communicated, wherein the anchoring cavity is provided with filling tendon materials, at least two clamping pieces, pushing elastic pieces and pushing sliding blocks, and the quantity of the pushing elastic pieces is the same as that of the clamping pieces; the two ends of the clamping piece are in a conical structure, and the outer diameter of the filling rib material is larger than the inner diameter of the rib penetrating hole; the inner wall of the anchoring cavity is provided with a conical surface matched with the conical surface at the first end of the clamping piece and a supporting surface for supporting the pushing sliding block, and the pushing sliding block is provided with a conical surface matched with the conical surface at the second end of the clamping piece; the pushing elastic piece is used for pushing the pushing sliding block to drive the clamping piece to clamp the filling rib material. The utility model discloses a centre gripping type prestressing tendons is from anchor can improve the work efficiency of wearing the muscle to promote the anchor reliability, when frictional force became invalid or when not enough, can enlarge the end and push away the top with the clamping piece and get into the toper cavity of anchor cavity through the prestressing tendons, and form dual anchor mechanism.
Description
Technical Field
The utility model relates to an anchor especially relates to a centre gripping type prestressing tendons is from anchor.
Background
At present, vertical prefabrication and assembly technologies are often adopted in the construction process of infrastructures such as large bridge piers and wind turbine tower towers, and the adoption of vertical prestress tensioning to enable all prefabricated parts to be smoothly spliced in place is an important construction means. Different from horizontal prestress, the lower anchoring end of vertical prestress is deeply buried in an abutment or a foundation in the construction process, and stable anchoring cannot be formed through manual operation. The existing technology is that when the bottom section is constructed, the bar material is anchored, and as the construction section is continuously raised, the prestressed bar is continuously lengthened, the construction process is complicated, and the prestressed bar is exposed for a long time to cause rusting and corrosion, thereby reducing the safety performance of the structure. The existing clamp piece type prestressed tendon anchorage device needs manual intervention to push the clamp piece into the anchor ring to form anchoring, and cannot be applied to a self-anchoring system.
In the prior art, for example, chinese patent CN106245850A discloses a closed automatic anchor, which includes: the cover plate is matched with the cover plate rubber sealing gasket and used for sealing the inner cavity of the anchorage device; the base is arranged below the cover plate, is connected with the cover plate through bolts and is used for providing an inner cavity space for automatically anchoring the prestressed tendons under the condition of no working space and a connecting carrier of related components; the clamping piece with the guide surface is arranged in the inner cavity of the base, is connected with the base through a spring and a spring supporting plate and is used for automatically engaging and anchoring the prestressed tendons; the shuttle pipe is connected with the base through end threads and is used for shuttling the steel strand; the clamping piece with the guide surface is adopted for guiding the installation of the prestressed tendons in the prior art, but the self-anchoring device can only be arranged above the self-anchoring device when the self-anchoring device is used for vertical prefabrication and assembly, and the self-anchoring device is not suitable for pre-embedding; and in the work progress, though the clamping piece has the spigot surface, the body of two clamping pieces lower parts still is in the state of hugging closely, wears the muscle in-process and needs to adopt great vertical force to offset the clamping-force of two clamping pieces horizontal direction, consequently, wears the muscle degree of difficulty in the work progress big, the efficiency of construction low.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a clamping type prestressed tendon self-anchoring device, aiming at solving the problems of complex construction process, long construction period, low anchoring efficiency, insufficient stability and the like of the existing self-anchoring system; the failure of the prestressed anchorage system and the like when the spring is deviated or the prestressed tendon is loosened, disturbed and insufficient in friction force.
The utility model discloses take following technical scheme to realize above-mentioned purpose:
a clamping type prestressed tendon self-anchoring device comprises a tendon-penetrating pore passage, an anchoring cavity and a filling cavity which are sequentially connected in a penetrating manner, wherein filling tendon materials, at least two clamping pieces, pushing elastic pieces and pushing sliding blocks which are the same in number as the clamping pieces are arranged in the anchoring cavity; the two ends of the clamping piece are in a conical structure, and the outer diameter of the filling rib material is larger than the inner diameter of the rib penetrating hole; the inner wall of the anchoring cavity is provided with a conical surface matched with the conical surface of the first end of the clamping piece and a supporting surface matched with the bottom surface of the pushing sliding block, and the bottom surface of the pushing sliding block is positioned on the supporting surface; the pushing sliding block is provided with a conical surface matched with the conical surface of the second end of the clamping piece; the pushing elastic piece is used for pushing the pushing sliding block to drive the clamping piece to clamp the filling rib material.
The working principle of the self-anchoring device in the technical scheme is as follows: before the prestressed tendons are not anchored: the pushing elastic piece is in a compressed state, the pushing sliding block is pushed to move along the supporting surface, the conical surface of the pushing sliding block is matched with the conical surface of the second end of the clamping piece, and the pushing clamping piece moves towards the direction of the conical surface of the first end of the anchoring cavity along the conical surface of the inner wall of the anchoring cavity, so that the filling rib is clamped; the prestressed tendon inserting process: pushing the filling position reinforcing material to continuously move downwards to enter a filling position cavity at the lower part of the anchoring cavity in the process of lowering the prestressed tendon, clamping the prestressed tendon by the clamping piece under the action of the pushing elastic piece when the prestressed tendon is lower than the bottom edge of the clamping piece, and keeping the pushing elastic piece in a semi-compression state at the moment; the prestressed tendon anchoring state: and lifting the prestressed tendons, wherein the clamping pieces move upwards along the conical parts of the inner wall of the anchoring cavity under the action of friction force, and anchoring is formed by utilizing the wedge principle. All parts in this scheme all shaping before the construction, the mill is prefabricated, can reduce job site work load and construction complexity, places before wearing the muscle and fills a position muscle material, improves the work efficiency of wearing the muscle and promotes the anchor reliability.
The further technical proposal is that a limit stop is arranged on the supporting surface and is positioned between the inner wall of the anchoring cavity and the pushing slide block. Prevent the filling rib material from sliding off due to the fact that the double-cone clamping piece is too large in opening.
The anchoring device further comprises a prestressed tendon, wherein the outer diameter of the anchoring end head of the prestressed tendon is larger than that of the tendon body of the prestressed tendon, and is smaller than the inner diameter of the tendon-penetrating hole. In the installation process, the expanded head prestressed tendon pushes the filling position reinforcing material, when the end head of the anchoring end is lower than the bottom edge of the clamping piece, the clamping piece clamps the prestressed tendon body under the action of the pushing elastic piece, and the pushing elastic piece is continuously in a semi-compression state; and lifting the prestressed tendon, and moving the clamping piece upwards along the conical surface of the anchoring cavity inner wall matched with the first section of the clamping piece in a conical manner under the pushing action of the friction force and the end head of the anchoring end of the prestressed tendon to form anchoring. By adopting the scheme of the self-anchoring device containing the prestressed tendon with the expansion head, when the spring is deviated or the prestressed tendon is loosened, disturbed and the friction force fails, the expansion head of the prestressed tendon is utilized to exert a pushing action on the double-cone-shaped clamping piece, so that the prestressed tendon can smoothly enter the cone-shaped cavity of the anchoring cavity to form mechanical anchoring.
The further technical proposal is that the pushing elastic element is one of a spring, a plate spring or a rubber block.
The further technical scheme is that the inner surface of the clamping piece is provided with fine teeth, and the outer surface of the clamping piece is smooth.
The mounting method of the clamping type prestressed tendon self-anchoring device comprises the following steps:
prefabricating and molding the self-anchoring device;
pre-burying the self-anchoring device in concrete;
installing an upper concrete member after the concrete reaches the designed strength, wherein a reinforcement penetrating hole channel needs to be reserved in the concrete member;
inserting the prestressed reinforcement into the reinforcement through hole, lowering the prestressed reinforcement into the anchoring cavity, and pushing the filling position reinforcement to fall into the lower filling position cavity;
and lifting the prestressed reinforcement to drive the clamping piece to enter the conical area of the anchoring cavity to form mechanical anchoring.
The utility model has the advantages that:
the utility model provides a clamping type prestressed tendon self-anchoring device, its all parts all shape before the construction, the mill prefabricates, can reduce job site work load and construction complexity, and can guarantee construction quality, place the position muscle material of filling before wearing the muscle, improve the work efficiency of wearing the muscle and promote the anchoring reliability, avoided the self-anchoring device of the existing spring bayonet socket in the process of wearing the muscle, two clamping pieces hug closely difficult wearing the muscle and the anchor inefficiency of prestressed muscle; the clamping piece of device can rely on the frictional force of clamping piece and prestressing tendons to bring the clamping piece into the toper cavity of anchor cavity and form mechanical anchoring when forming mechanical clamping, under the condition that frictional force became invalid or is not enough, can push away the toper cavity that gets into the anchor cavity with the clamping piece top through the expansion end of prestressing tendons to form the duplicate protection mechanism, improve the security of anchor.
Drawings
FIG. 1 is a diagram: a centre gripping type prestressing tendons is from anchor device prestressing tendons schematic structure before the anchoring.
FIG. 2 is a diagram of: a centre gripping type prestressing tendons is from anchor device prestressing tendons insertion process's schematic structure.
FIG. 3 is a diagram of: a centre gripping type prestressing tendons is from anchor device prestressing tendons anchor state's schematic structure view.
In the figure:
1. a self-anchoring device; 11. a tendon-penetrating duct; 12. an anchoring cavity; 13. a support surface; 14. filling the cavity; 2. a clip; 3. pushing the elastic element; 4. pushing the sliding block; 5. filling the rib material; 6. prestressed tendons; 61. an anchoring end head; 7. and a limit stop.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings 1 to 3 and the embodiments, and features in the following embodiments and examples may be combined with each other without conflict.
As shown in fig. 1, the present embodiment provides a clamping type prestressed tendon self-anchoring device 1, where the self-anchoring device 1 is prefabricated and formed in a factory, and can be pre-embedded in concrete in a factory prefabricated component or a construction site, an upper concrete component is installed after the concrete reaches a designed strength, and a tendon passing hole 11 needs to be reserved in advance for the upper concrete component, and the self-anchoring device 1 includes a tendon passing hole 11, an anchoring cavity 12 and a filling cavity 14 which are sequentially connected in a penetrating manner, and the above components may be prefabricated and integrally formed in a factory, or may be assembled and formed; two clamping pieces 2, two pushing elastic pieces 3, two pushing sliding blocks 4 and a filling rib material 5 are arranged in the anchoring cavity 12, the two clamping pieces 2 form a structure with two conical ends, and tooth-shaped ripples are arranged on the inner surface of each clamping piece 2 and used for improving the friction force between the clamping pieces 2 and the pre-stressed rib material 6 or the filling rib material 5; in the embodiment, the pushing elastic part 3 is a spring, the two clamping pieces 2 clamp the filling rib 5 under the action of the pushing elastic part 3, and the outer diameter of the filling rib 5 is larger than the inner diameter of the rib penetrating channel 11; the inner wall of the anchoring cavity 12 is provided with a conical surface which is matched with the first end (the end close to the tendon-penetrating duct 11) of the clamping piece 2 in a conical shape, and is also provided with a supporting surface 13 which is matched with the bottom surface of the pushing sliding block 4, the bottom surface of the pushing sliding block 4 is positioned on the supporting surface 13, and the pushing sliding block 4 is provided with a conical surface which is matched with the conical surface of the second end of the clamping piece 2; the support surface 13 may be an annular surface inside the anchoring cavity 12, or may be a plane extending from the inner wall of the anchoring cavity 12 to the inside thereof below the corresponding position of each pushing slider 4; the pushing elastic part 3 is used for pushing the pushing sliding block 4 so as to drive the clamping piece 2 to clamp the filling rib 5, in the embodiment, one end of a spring is propped against the inside of the anchoring cavity 12, and the other end of the spring is propped against the pushing sliding block 4; wherein, the external diameter of the anchoring end head 61 of the prestressed tendon 6 for anchoring is larger than the external diameter of the tendon body and smaller than the internal diameter of the tendon-passing hole 11.
The self-anchoring process of the embodiment is as follows:
as shown in fig. 1, before the tendon 6 is anchored: the pushing elastic piece 3 is in a compressed state, the pushing sliding block 4 is pushed to move along the supporting surface 13, the conical surface of the pushing sliding block 4 is matched with the second end conical surface of the clamping piece 2, and the pushing clamping piece 2 moves towards the direction of the first end conical surface along the conical surface of the inner wall of the anchoring cavity 12, so that the filling rib material 5 is clamped;
as shown in fig. 2, the tendon 6 insertion process: when the anchoring end head 61 of the prestressed tendon 6 moves downwards, the filling position bar 5 is pushed to continuously move downwards to enter the filling position cavity 14 at the lower part of the anchoring cavity, the filling position cavity 14 is used for accommodating the filling position bar 5 after the tendon is penetrated, when the anchoring end head 61 is lower than the bottom edge of the clamping piece 2, the clamping piece 2 clamps the prestressed tendon under the action of the pushing elastic piece 3, and at the moment, the pushing elastic piece 3 is continuously in a compressed state;
as shown in fig. 3, the tendon 6 is anchored: the prestressed tendon 6 is lifted, and the clip 2 moves upwards along the conical surface of the inner wall of the anchoring cavity 12 and the first section of the clip 2 in a conical fit manner under the friction force of the tendon 6 and the pushing action of the anchoring end head of the prestressed tendon 6 to form anchoring.
The installation method of the clamping type prestressed tendon self-anchoring device of the embodiment comprises the following steps:
a. the self-anchoring device is prefabricated and molded and can be an integrally molded structure or an assembled structure of the rib hole channel 11, the anchoring cavity 12 and the filling cavity 14; the embodiment specifically adopts an integrally formed structure;
b. pre-burying the self-anchoring device in concrete, wherein the self-anchoring device can be pre-buried in a factory prefabricated part or pre-buried in a construction site;
c. installing an upper concrete member after the concrete reaches the designed strength, wherein a reinforcement penetrating hole 11 needs to be reserved in the concrete member;
d. inserting the prestressed reinforcement material 6 with the anchoring end head 61 into the reinforcement penetrating hole 11, lowering the prestressed reinforcement material 6 into the anchoring cavity 12, and pushing the filling position reinforcement material 5 to fall into the lower filling position cavity 14;
e. the prestressed reinforcement material 6 is lifted, the double-cone clamping piece 2 rises along with the prestressed reinforcement material 6 under the action of friction force between the fine teeth arranged on the inner surface and the reinforcement material, and enters the conical part of the anchoring cavity 12 to form mechanical clamping.
The adoption of the prestressed reinforcement 6 with the enlarged end 61 can ensure that the double-cone clip 2 smoothly enters the conical part of the anchoring cavity 12 under the condition of friction failure, and forms double guarantee of mechanical anchoring. In other embodiments or practical applications, the present installation method can also be applied to self-anchoring devices of traditional tendons.
All parts in the embodiment are molded before construction and are prefabricated in factories, so that the workload of a construction site and the construction complexity can be reduced, the construction quality can be ensured, and the filling rib material 5 is placed before rib penetration, so that the working efficiency of the rib penetration is improved, and the anchoring reliability is improved; by adopting the self-anchoring device 1 containing the expanded head prestressed tendon 6 (namely, the outer diameter of the anchoring end head 61 of the prestressed tendon 6 is larger than the outer diameter of the tendon body and smaller than the inner diameter of the tendon-penetrating pore canal 11), when the friction force of the clamping piece 2 is insufficient, the anchoring end head 61 of the prestressed tendon 6 can exert a pushing effect on the clamping piece 2, so that the clamping piece can smoothly enter the conical cavity of the anchoring cavity 12 to form mechanical anchoring.
The above embodiment exemplarily shows a technical solution that the pushing elastic member 3 is a spring, and according to other embodiments or practical applications, a plate spring, a rubber block, or the like may be used instead.
The self-anchoring scheme of the tendon 6 with the enlarged head is exemplarily shown in the above embodiments, the tendon 6 with the enlarged head is a preferred scheme, but not necessary technical features, according to other embodiments or practical applications, the conventional tendon 6 may also be anchored by the self-anchoring device in the present embodiment, and the tendon 6 is inserted: the filling bar material 5 is pushed to continuously move downwards to enter the lower part of the anchoring cavity in the downward movement process of the prestressed bar 6, when the end part of the prestressed bar 6 is lower than the bottom edge of the clamping piece 2, the clamping piece 2 clamps the prestressed bar 6 under the action of the pushing elastic piece 3, and the pushing elastic piece 3 is continuously in a compressed state; the anchoring state of the prestressed tendon 6 is as follows: the prestressed tendon 6 is lifted, and the clip 2 moves upwards along the conical part of the inner wall of the anchoring cavity 12 under the action of friction force to form anchoring.
The above embodiment exemplarily shows an embodiment of two clips 2, and according to other embodiments and practical applications, the number of the clips 2 may be two or more conical structures at two ends, which are surrounded by the clips, and the clips are used for clamping the filling position reinforcement material 5 before anchoring and used for clamping the prestressed reinforcement material 6 after anchoring.
In another embodiment, on the basis of the above embodiment, the self-anchoring device 1 further comprises a limit stop 7 disposed on the supporting surface 13, the limit stop 7 is located between the inner wall of the anchoring cavity 12 and the pushing slide block 4, and the limit stop 7 can limit the downward movement amount of the clip 2 caused by downward movement along with the tendon 6, so as to prevent the clip 2 from excessively downward movement.
The utility model provides a clamping type prestressed tendon self-anchoring device, its all parts all shape before the construction, the mill prefabricates, can reduce job site work load and construction complexity, and can guarantee construction quality, place and fill position muscle material 5 before wearing the muscle, improve the work efficiency of wearing the muscle and promote the anchoring reliability, avoided the self-anchoring device of the existing spring bayonet socket in the process of wearing the muscle, two clamping pieces are hugged closely and are difficult to wear the muscle and the prestressed tendon anchoring efficiency is low; clamping piece 2 of device can rely on the frictional force of clamping piece 2 and prestressing tendons 6 to bring the clamping piece into the toper cavity of anchor cavity 12 and form mechanical anchor when forming mechanical clamping, under the frictional force inefficacy or not enough condition, clamping piece 2 can get into the toper cavity of anchor cavity 12 through the top of the anchor end 61 that prestressing tendons 6 enlarge to form the duplicate protection mechanism, improve the security of anchor.
Claims (5)
1. A clamping type prestressed tendon self-anchoring device is characterized by comprising a tendon-penetrating pore passage (11), an anchoring cavity (12) and a filling cavity (14) which are sequentially connected in a penetrating way; a filling rib (5), at least two clamping pieces (2), pushing elastic pieces (3) and pushing sliding blocks (4) which are the same as the clamping pieces (2) in number are arranged in the anchoring cavity (12);
the two ends of the clamping piece (2) are of conical structures, and the outer diameter of the filling rib material (5) is larger than the inner diameter of the rib penetrating hole (11);
the inner wall of the anchoring cavity (12) is provided with a conical surface matched with the conical surface at the first end of the clamping piece (2), and is also provided with a supporting surface (13) matched with the bottom surface of the pushing sliding block (4), and the bottom surface of the pushing sliding block (4) is positioned on the supporting surface (13);
the pushing sliding block (4) is provided with a conical surface matched with the conical surface of the second end of the clamping piece (2); the pushing elastic piece (3) is used for pushing the pushing sliding block (4) to drive the clamping piece (2) to clamp the filling rib material (5).
2. The self-anchoring device for the prestressed tendon of claim 1, wherein the supporting surface (13) is further provided with a limit stop (7), and the limit stop (7) is located between the inner wall of the anchoring cavity (12) and the pushing slide block (4).
3. The self-anchoring device of the clamping prestressed tendon as claimed in claim 1, wherein the anchoring device further comprises a prestressed tendon (6) having an anchoring end head (61) with an outer diameter larger than the outer diameter of the tendon body and smaller than the inner diameter of the tendon-passing channel (11).
4. The self-anchoring device of the clamping prestressed tendon as claimed in claim 1, wherein said pushing elastic member (3) is one of a spring, a plate spring or a rubber block.
5. The self-anchoring device for prestressed tendons as claimed in claim 1, wherein said clip (2) has serrations on its inner surface and the clip (2) has a smooth outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922010974.9U CN211848856U (en) | 2019-11-20 | 2019-11-20 | Clamping type prestressed tendon self-anchoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922010974.9U CN211848856U (en) | 2019-11-20 | 2019-11-20 | Clamping type prestressed tendon self-anchoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211848856U true CN211848856U (en) | 2020-11-03 |
Family
ID=73218990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922010974.9U Active CN211848856U (en) | 2019-11-20 | 2019-11-20 | Clamping type prestressed tendon self-anchoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211848856U (en) |
-
2019
- 2019-11-20 CN CN201922010974.9U patent/CN211848856U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110359363B (en) | Partially-bonded prestressed assembly type self-resetting bridge pier column node and method | |
| CN110820539A (en) | Clamping type prestressed tendon self-anchoring device and installation method | |
| KR101072527B1 (en) | Retaining wall structure using twisted steel wire | |
| CN107386127B (en) | Bridge pier assembling device | |
| CN108086130B (en) | Assembled T-shaped steel pipe constraint reinforced concrete bridge pier beam column connection node | |
| CN102808422A (en) | Bonded post-tensioned prestressed construction method for cast-in-place reinforced concrete structure | |
| US6634830B1 (en) | Method and apparatus for post-tensioning segmented concrete pilings | |
| CN211848856U (en) | Clamping type prestressed tendon self-anchoring device | |
| CN109339087B (en) | Infrastructure system of low-rise building | |
| CN202031026U (en) | Finished cable type anchorage anchoring system | |
| KR100860796B1 (en) | Continuationization method by which psc which used upper and lower symmetry or asymmetric fixed bracket | |
| CN205421045U (en) | Local reinforcing structure that mixes of festival segmentation dry joint seam T web | |
| CN113882368B (en) | Structure for tensioning anchor rod by utilizing anchor | |
| CN111997204B (en) | Transverse position-adjustable assembled vertical component connecting structure and construction method thereof | |
| CN213203782U (en) | Bridge expansion joint device for bridge | |
| CN210563543U (en) | External unbonded prestressed underpinning node | |
| KR100977524B1 (en) | Construction method for bridge structure | |
| JP2001303592A (en) | Method for installing and fixing block | |
| EP3118386B1 (en) | Wedge for post tensioning tendon | |
| CN205152948U (en) | Solid stake of internal prestressed anchorage of prefabricated pin -connected panel | |
| CN220183794U (en) | Assembled bridge girder plate structure | |
| CN213389741U (en) | Clamping piece mounting pipe for prestress | |
| KR102231568B1 (en) | Inner-Prestress Anchor Device by hydro pressure cylinder system | |
| CN113323108B (en) | Internal anchor PE plate composite large-diameter drainage pipeline installation structure and construction method thereof | |
| CN219528165U (en) | Steel wire anchoring piece and corresponding concrete slab structure thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |