CN113897863A - Combined prestressed anchorage device - Google Patents
Combined prestressed anchorage device Download PDFInfo
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- CN113897863A CN113897863A CN202111039038.6A CN202111039038A CN113897863A CN 113897863 A CN113897863 A CN 113897863A CN 202111039038 A CN202111039038 A CN 202111039038A CN 113897863 A CN113897863 A CN 113897863A
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- 210000003205 muscle Anatomy 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 46
- 239000010959 steel Substances 0.000 description 46
- 238000013461 design Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The utility model relates to the technical field of air detection and monitoring, in particular to a combined type prestress anchor, which comprises a shell, wherein a support rod is fixedly connected to the lower part of the inner side wall of the shell, a corrugated pipe is fixedly connected to the lower end of the support rod, a threaded rib is fixedly connected to the lower end of the shell, a round hole is formed in the top of the shell, a threaded cylinder is slidably connected to the inner side wall of the round hole, a clamping piece is movably connected to the upper end of the threaded cylinder, a sleeve is in threaded connection with the outer side of the threaded cylinder, cavities are formed in the left side and the right side of the inner part of the threaded cylinder, a limiting rod is fixedly connected to the lower end of the inner part of the shell, after the clamping piece enters the inner part of the threaded cylinder, the threaded cylinder is driven to move upwards by rotating the sleeve, prestress lost in the inward movement during the recovery of the clamping piece can be compensated, and the prestress can reach a set ideal preset value as much as possible, the possibility of damage to later buildings due to substandard prestressing is avoided as much as possible.
Description
Technical Field
The utility model relates to the technical field of air detection and monitoring, in particular to a combined type pre-stressed anchor.
Background
The prestressed anchorage is usually used in bridge construction, is pre-installed and positioned, then is poured with concrete and is buried at two ends of the concrete, namely two ends of the corrugated pipe, and is an end face arranged for the stabilizing effect of the jack during tensioning.
The utility model provides a prestressed anchorage device, which belongs to the prestressed anchorage device of the prior patent (publication number: CN 212026860U). The prestressed anchorage device comprises a base plate; the steel strands penetrate through the base plate and are linearly distributed on the base plate; the plurality of extrusion anchors are all installed on one side of the base plate, and the plurality of steel strands penetrate through the plurality of extrusion anchors respectively; the corrugated pipe is positioned on one side, away from the extrusion anchor, of the base plate, and the corrugated pipe is sleeved on the outer sides of the steel strands; the grouting pipe is arranged on the corrugated pipe; the threaded ribs are sleeved on the outer sides of the corrugated pipe and the steel strands; and the guide mechanisms are respectively arranged on one sides of the base plates, which are far away from the extrusion anchor. The prestressed anchorage device provided by the utility model has the advantages of convenience in use, repeated utilization and convenience in installation of steel strands.
In foretell case, can be more convenient when using, but still have some problems, current ground tackle is of a great variety, has one kind for porous clamping piece mould, and this ground tackle is when tensile good dynamics, and the clamping piece has the action that a steel strand wires were retrieved to the inside shrink of round hole, can lead to like this and has certain error with the prestressing force that calculates, makes the quality of water congeals soil not up to standard, makes the building have certain risk like this in the later stage:
therefore, a combined type prestressed anchorage device is provided.
Disclosure of Invention
The utility model aims to provide a combined type pre-stressed anchor, after a clamping piece enters the interior of a threaded cylinder, the threaded cylinder is driven to move upwards by rotating a sleeve, and the pre-stress lost by the inward movement of the clamping piece can be compensated, so that the pre-stress can reach ideal strength as much as possible, the stability of concrete is improved, and the problems in the background art are solved.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a modular prestressed anchorage utensil, includes the shell, the inside wall lower part fixedly connected with bracing piece of shell, the lower extreme fixedly connected with bellows of bracing piece, the lower extreme fixedly connected with screw thread muscle of shell, the round hole has been seted up at the top of shell, the inside wall sliding connection of round hole has the screw thread drum, the upper end swing joint of screw thread drum has the clamping piece, the outside threaded connection of screw thread drum has the sleeve, the cavity has all been seted up to the inside left and right sides of screw thread drum, the inside lower extreme fixedly connected with gag lever post that is located the cavity of shell.
The during operation, pass through the inside of bellows with the steel strand wires, rethread screw thread drum stretches out the steel strand wires, carry out the increasement of prestressing force with chest expanders such as jack this moment, when reaching the prestressing force of this building, the steel strand wires are loosened to tools such as chest expander, the steel strand wires drives the clamping piece and retrieves this moment, steel strand wires and the inside that the clamping piece got into the screw thread drum, there is certain prestressing force loss, at this moment, the rotating sleeve, the screw thread drum rises when the sleeve rotates, can drive screw thread drum rotation when the sleeve pivoted, because the gag lever post of design, the direction of rotation has been restricted, so the rotation of screw thread drum has been avoided, because the screw thread drum drives the steel strand wires when shifting up and moves upward.
Preferably, the inside lower extreme of shell is located the screw thread drum left and right sides and all has seted up the recess, the inside fixedly connected with first spring of recess, the one side fixedly connected with horizontal pole that is close to the screw thread sleeve of first spring, the right side fixedly connected with semi-circular bearing block of horizontal pole, semi-circular bearing block is for contacting in proper order.
When the threaded cylinder moves upwards, a gap appears at the bottom, the first spring in the groove pushes the cross rod, the cross rod pushes the semicircular bearing block, and the gap can be filled up by designing the plurality of semicircular bearing blocks.
Preferably, the upper ends of two sides of the interior of the sleeve are respectively provided with a sliding chute, the interior of each sliding chute is fixedly connected with a second spring, and one side of each second spring, which is close to the threaded cylinder, is fixedly connected with a stop lever.
When the clamping piece is installed, the clamping piece is in a conical shape, so that when the clamping piece approaches to the threaded cylinder, the two stop rods are extruded to move towards the left side and the right side of the threaded sleeve, the two stop rods extrude the second spring, when the clamping piece passes over the stop rods, the second spring resets, and at the moment, the second spring resets the stop rods.
Preferably, the inner walls of the two sides of the threaded cylinder are fixedly connected with connecting rods, and the lower ends of the connecting rods are rotatably connected with triangular blocks.
When the screw thread drum moved up, drive the connecting rod rebound this moment, remove the triangle-shaped piece rebound on the connecting rod, because it is the triangle-shaped design to remove the triangle-shaped piece, so when removing the inside that the triangle-shaped piece got into the round hole, the bottom cross-section of screw thread drum can contract.
Preferably, the left side and the right side of the sleeve are both in threaded connection with threaded rods, and one side of each threaded rod, which is close to the threaded cylinder, is rotatably connected with a semicircular clamping block.
When the steel strand wires are fixed, the two threaded rods are rotated at the moment, the two threaded rods move inwards, and the two threaded rods drive the semicircular clamping blocks to move inwards.
Preferably, the inner side wall of the semicircular fixture block is provided with a circular groove.
The friction force between the semicircular fixture block and the steel strand can be increased, and the fixing performance is further improved.
Compared with the prior art, the utility model has the beneficial effects that:
1. after the clamping pieces enter the interior of the threaded cylinder, the threaded cylinder is driven to move upwards through the rotating sleeve, and prestress lost by the inward movement of the clamping pieces can be supplemented, so that the prestress can reach ideal strength as far as possible, and the stability of concrete is improved;
2. through the design of shelves pole, after the installation clamping piece, can not follow the steel hank silk and outwards remove, make the device use more convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of a front view of the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 according to the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 3B according to the present invention;
fig. 5 is a structural diagram of the semi-circular latch of the present invention.
In the figure: 1. a housing; 2. a support bar; 3. a threaded rib; 4. a circular hole; 5. a threaded cylinder; 6. a clip; 7. a sleeve; 8. a cavity; 9. a limiting rod; 10. a first spring; 11. a semicircular bearing block; 12. a chute; 13. a second spring; 14. a gear lever; 15. a threaded rod; 16. a semicircular clamping block; 17. a connecting rod; 18. a triangular block; 19. a circular groove; 20. a bellows; 21. a groove; 22. a cross bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, the present invention provides a technical solution:
a combined prestressed anchorage device, as shown in fig. 1 to 3, comprising a housing 1, wherein a support rod 2 is fixedly connected to the lower portion of the inner side wall of the housing 1, a corrugated pipe 20 is fixedly connected to the lower end of the support rod 2, a threaded rib 3 is fixedly connected to the lower end of the housing 1, a round hole 4 is formed in the top of the housing 1, a threaded cylinder 5 is slidably connected to the inner side wall of the round hole 4, a clamping piece 6 is movably connected to the upper end of the threaded cylinder 5, a sleeve 7 is threadedly connected to the outer side of the threaded cylinder 5, cavities 8 are formed in the left side and the right side of the interior of the threaded cylinder 5, and a limit rod 9 is fixedly connected to the lower end of the interior of the housing 1, which is located in the cavity 8;
when the steel strand is pulled to a certain value, the steel strand drives the clamping piece 6 to be recovered, the prestress force is reduced, the pulling force is increased when the steel strand is pulled, and the elastic coefficient of the steel strand can be exceeded, so that the steel strand is damaged;
when in work, the steel strand passes through the interior of the corrugated pipe 20 and then extends out through the threaded cylinder 5, at the moment, the prestress is increased by using a tension device such as a jack and the like, when the prestress of the building is reached, the steel strand is loosened by tools such as a chest expander and the like, the steel strand drives the clamping piece 6 to be recovered, the steel strand and the clamping piece 6 enter the interior of the threaded cylinder 5, certain prestress loss exists, the sleeve 7 is rotated, the threaded cylinder 5 rises when the sleeve 7 rotates, the sleeve 7 can drive the threaded cylinder 5 to rotate when rotating, and the designed limiting rod 9 limits the rotation direction, therefore, the self-rotation of the threaded cylinder 5 is avoided, because the threaded cylinder 5 drives the steel strand to move upwards when moving upwards, therefore, the lost prestress can be pulled back for the second time, the loss of the prestress is effectively reduced, and the quality of the concrete is improved.
As an embodiment of the present invention, as shown in fig. 1 to 4, grooves 21 are formed in the lower end of the inside of the housing 1 on both left and right sides of the threaded cylinder 5, a first spring 10 is fixedly connected to the inside of the groove 21, a cross bar 22 is fixedly connected to one side of the first spring 10 close to the threaded cylinder 5, a semicircular bearing block 11 is fixedly connected to the right side of the cross bar 22, and the semicircular bearing blocks 11 are sequentially in contact with each other;
the during operation, when screw thread drum 5 rebound, the space appears in the bottom, recess 21 inside first spring 10 promotes horizontal pole 22 this moment, horizontal pole 22 promotes semi-circular bearing piece 11, through designing a plurality of semi-circular bearing pieces 11, can give the space through semi-circular bearing piece 11 like this and mend, appear the space below when having avoided screw thread drum 5 to move up, lead to screw thread drum 5 to be in unsettled state, lead to screw thread drum 5 to be pulled unstably by the steel strand wires, the device's stability has further been improved.
As an embodiment of the present invention, as shown in fig. 1 to 3, sliding grooves 12 are formed at upper ends of two sides of the interior of the sleeve 7, a second spring 13 is fixedly connected to the interior of the sliding grooves 12, and a stop lever 14 is fixedly connected to one side of the second spring 13 close to the threaded cylinder 5;
when the steel strand is pulled after the clamping piece 6 is fixed, the clamping piece 6 may be driven by the steel strand to move outwards, and extra pushing is needed manually, so that the complexity of the working procedure is increased;
during operation, when the clamping piece 6 is installed, because the clamping piece 6 is conical, when the clamping piece 6 approaches the threaded cylinder 5, the two stop rods 14 are extruded to move towards the left side and the right side of the threaded sleeve 5, the two stop rods 14 extrude the second spring 13, when the clamping piece 6 crosses the stop rods 14, the second spring 13 resets the stop rods 14, and in this way, when steel strand pulling force is carried out, manual resetting is not needed, so that the device can be used more conveniently.
As an embodiment of the present invention, as shown in fig. 3 and 5, a connecting rod 17 is fixedly connected to both inner walls of the threaded cylinder 5, and a triangular block 18 is rotatably connected to a lower end of the connecting rod 17;
the during operation, when screw thread drum 5 upwards removed, drive connecting rod 17 and upwards remove this moment, connecting rod 17 upwards removes and drives triangle-shaped piece 18 rebound, because it is the triangle-shaped design to remove triangle-shaped piece 18, so when removing triangle-shaped piece 18 and get into the inside of round hole 4, the bottom cross-section of screw thread drum 5 can contract, further plays fixed effect to the steel strand wires.
As an embodiment of the present invention, as shown in fig. 1, fig. 2, fig. 3 and fig. 5, threaded rods 15 are connected to both left and right sides of the sleeve 7 by threads, a semicircular clamping block 16 is rotatably connected to one side of the threaded rod 15 close to the threaded cylinder 5, and a circular groove 19 is formed in an inner side wall of the semicircular clamping block 16;
during operation, when fixing the steel strand wires, rotating two threaded rods 15 at the moment, moving the two threaded rods 15 towards the inside of the sleeve 7, and driving the semicircular clamping blocks 16 to move towards the surfaces of the steel strand wires by the two threaded rods 15, so that the steel strand wires are fixed, and the fixation of the steel strand wires can be further enhanced.
The working principle is as follows:
when the concrete is in work, the steel stranded wires pass through the interior of the corrugated pipe 20 and then extend out of the threaded cylinder 5, the prestress is increased by using a tension device such as a jack, when the prestress of the building is reached, the steel stranded wires are loosened by using tools such as the tension device, the steel stranded wires drive the clamping pieces 6 to be recovered, the steel stranded wires and the clamping pieces 6 enter the interior of the threaded cylinder 5, certain prestress loss exists, the sleeve 7 is rotated, the threaded cylinder 5 rises when the sleeve 7 rotates, the threaded cylinder 5 is driven to rotate when the sleeve 7 rotates, the self-rotation direction of the threaded cylinder 5 is limited due to the designed limiting rod 9, the self-rotation of the threaded cylinder 5 is avoided, the steel stranded wires are driven to move upwards when the threaded cylinder 5 moves upwards, so that the lost prestress can be pulled back for two times, the loss of the prestress is effectively reduced, and the quality of the concrete is improved, when the threaded cylinder 5 moves upwards, a gap is formed at the bottom, the first spring 10 in the groove 21 pushes the cross rod 22, the cross rod 22 pushes the semicircular bearing block 11, and the plurality of semicircular bearing blocks 11 are designed, so that the gap can be filled up through the semicircular bearing blocks 11, the phenomenon that when the threaded cylinder 5 moves upwards, the gap is formed below the threaded cylinder 5, the threaded cylinder 5 is in a suspended state, the threaded cylinder 5 is pulled by a steel strand and is unstable, the stability of the device is further improved, when the clamping piece 6 is installed, because the clamping piece 6 is in a conical shape, when the clamping piece 6 approaches the threaded cylinder 5, the two blocking rods 14 are extruded to move towards the left side and the right side of the threaded sleeve 5, the two blocking rods 14 extrude the second spring 13, when the clamping piece 6 passes over the blocking rods 14, the second spring 13 resets, the blocking rods 14 are reset by the second spring 13, like this when carrying out steel strand wires pulling force, do not need the manual work to reset, can make the device use more portably like this, in screw thread drum 5 upwards removal, drive connecting rod 17 upwards removal this moment, connecting rod 17 upwards removes and drives triangle-shaped piece 18 rebound, because it is the triangle-shaped design to remove triangle-shaped piece 18, so when removing triangle-shaped piece 18 and get into the inside of round hole 4, the bottom cross-section of screw thread drum 5 can contract, further play fixed effect to the steel strand wires, when fixing steel strand wires, two rotatory threaded rods 15 this moment, two threaded rods 15 are to the inside removal of sleeve 7, two threaded rods 15 drive the surface removal of semicircle fixture block 16 to the steel strand wires, thereby fix the steel strand wires, can further strengthen the fixed to the steel strand wires like this.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A combined prestressed anchorage device comprises a shell (1), and is characterized in that: the utility model discloses a screw thread drum, including shell (1), the inside wall lower part fixedly connected with bracing piece (2) of shell (1), lower extreme fixedly connected with bellows (20) of bracing piece (2), lower extreme fixedly connected with screw thread muscle (3) of shell (1), round hole (4) have been seted up at the top of shell (1), the inside wall sliding connection of round hole (4) has screw thread drum (5), the upper end swing joint of screw thread drum (5) has clamping piece (6), the outside threaded connection of screw thread drum (5) has sleeve (7), cavity (8) have all been seted up to both sides about the inside of screw thread drum (5), the inside of shell (1) is located inside lower extreme fixedly connected with gag lever post (9) of cavity (8).
2. The combined prestressed anchorage device of claim 1, wherein the lower inner end of the housing (1) is provided with a groove (21) on each of the left and right sides of the threaded cylinder (5), a first spring (10) is fixedly connected to the inside of the groove (21), a cross bar (22) is fixedly connected to one side of the first spring (10) close to the threaded cylinder (5), a semicircular bearing block (11) is fixedly connected to the right side of the cross bar (22), and the semicircular bearing blocks (11) are sequentially in contact with each other.
3. The combined prestressed anchorage of claim 1, wherein the sleeve (7) has a sliding groove (12) formed at the upper end of each of the two inner sides thereof, a second spring (13) is fixedly connected to the inside of the sliding groove (12), and a stop lever (14) is fixedly connected to the side of the second spring (13) close to the threaded cylinder (5).
4. The combined prestressed anchorage of claim 1, wherein the threaded cylinder (5) has a connecting rod (17) fixedly connected to both inner walls thereof, and the connecting rod (17) has a triangular block (18) rotatably connected to the lower end thereof.
5. The combined prestressed anchorage of claim 1, wherein a threaded rod (15) is threadedly connected to each of the left and right sides of the sleeve (7), and a semicircular clamping block (16) is rotatably connected to one side of the threaded rod (15) close to the threaded cylinder (5).
6. The combined prestressed anchorage of claim 5, wherein the inner side wall of said semicircular fixture block (16) is provided with a circular groove (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111039038.6A CN113897863B (en) | 2021-09-06 | 2021-09-06 | Use method of combined prestress anchorage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111039038.6A CN113897863B (en) | 2021-09-06 | 2021-09-06 | Use method of combined prestress anchorage device |
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| Publication Number | Publication Date |
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| CN113897863A true CN113897863A (en) | 2022-01-07 |
| CN113897863B CN113897863B (en) | 2024-04-30 |
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| CN202111039038.6A Active CN113897863B (en) | 2021-09-06 | 2021-09-06 | Use method of combined prestress anchorage device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030407A (en) * | 2022-05-07 | 2022-09-09 | 卫晓娟 | Prestressed porous anchorage device |
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| EP2372036A1 (en) * | 2010-03-22 | 2011-10-05 | Hermann Thal | Anchoring device for pre-stressed reinforcement |
| CN208763678U (en) * | 2018-08-08 | 2019-04-19 | 河南省中交路桥工程材料有限公司 | A kind of protective device suitable for flat anchorage |
| CN209277395U (en) * | 2018-12-18 | 2019-08-20 | 袁慧 | A kind of prestressed anchor |
| CN111173294A (en) * | 2019-12-31 | 2020-05-19 | 中建交通建设集团有限公司 | Spring reset type ultrashort prestressed beam low-retraction tensioning anchoring device and construction method |
| CN111173293A (en) * | 2019-12-31 | 2020-05-19 | 中建交通建设集团有限公司 | Manual reset type prestressed tendon low-retraction tensioning anchoring device and construction method |
| CN111535507A (en) * | 2020-05-29 | 2020-08-14 | 合肥铂特精密工具有限公司 | Combined prestressed anchorage device |
| CN112227223A (en) * | 2020-11-09 | 2021-01-15 | 北京工业大学 | One-time jacking reverse support device of low-retraction anchorage device |
| CN213740593U (en) * | 2020-10-28 | 2021-07-20 | 柳州宣桥预应力机械有限公司 | Low-retraction anchorage device applied to vertical tensioning of bridge |
| CN113322779A (en) * | 2021-05-08 | 2021-08-31 | 林玲 | Prestressed anchorage device |
| CN214090608U (en) * | 2020-11-25 | 2021-08-31 | 衡阳市新德力交通材料有限公司 | Prestressed anchorage utensil for construction |
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2021
- 2021-09-06 CN CN202111039038.6A patent/CN113897863B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2372036A1 (en) * | 2010-03-22 | 2011-10-05 | Hermann Thal | Anchoring device for pre-stressed reinforcement |
| CN208763678U (en) * | 2018-08-08 | 2019-04-19 | 河南省中交路桥工程材料有限公司 | A kind of protective device suitable for flat anchorage |
| CN209277395U (en) * | 2018-12-18 | 2019-08-20 | 袁慧 | A kind of prestressed anchor |
| CN111173294A (en) * | 2019-12-31 | 2020-05-19 | 中建交通建设集团有限公司 | Spring reset type ultrashort prestressed beam low-retraction tensioning anchoring device and construction method |
| CN111173293A (en) * | 2019-12-31 | 2020-05-19 | 中建交通建设集团有限公司 | Manual reset type prestressed tendon low-retraction tensioning anchoring device and construction method |
| CN111535507A (en) * | 2020-05-29 | 2020-08-14 | 合肥铂特精密工具有限公司 | Combined prestressed anchorage device |
| CN213740593U (en) * | 2020-10-28 | 2021-07-20 | 柳州宣桥预应力机械有限公司 | Low-retraction anchorage device applied to vertical tensioning of bridge |
| CN112227223A (en) * | 2020-11-09 | 2021-01-15 | 北京工业大学 | One-time jacking reverse support device of low-retraction anchorage device |
| CN214090608U (en) * | 2020-11-25 | 2021-08-31 | 衡阳市新德力交通材料有限公司 | Prestressed anchorage utensil for construction |
| CN113322779A (en) * | 2021-05-08 | 2021-08-31 | 林玲 | Prestressed anchorage device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030407A (en) * | 2022-05-07 | 2022-09-09 | 卫晓娟 | Prestressed porous anchorage device |
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| CN113897863B (en) | 2024-04-30 |
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