CN215164737U - Steel strand stretching brace structure and stretching anchorage device - Google Patents
Steel strand stretching brace structure and stretching anchorage device Download PDFInfo
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- CN215164737U CN215164737U CN202120789889.1U CN202120789889U CN215164737U CN 215164737 U CN215164737 U CN 215164737U CN 202120789889 U CN202120789889 U CN 202120789889U CN 215164737 U CN215164737 U CN 215164737U
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Abstract
The utility model relates to a stretch-draw construction appurtenance field, concretely relates to steel strand wires stretch-draw spike structure and stretch-draw ground tackle, this steel strand wires stretch-draw ground tackle includes: annular plate, arc bearing structure, anchor, jack and fastening ground tackle. Wherein, the middle part of the annular plate is provided with a through hole, and one side of the annular plate is provided with a groove with the diameter larger than that of the through hole; one end of the arc-shaped supporting structure is arranged at the other side of the annular plate, the other end of the arc-shaped supporting structure is used for abutting against the concrete structure, a channel for the steel strand to pass through is reserved in the middle of the arc-shaped supporting structure, and an opening is reserved on the side surface of the arc-shaped supporting structure; the anchoring device is arranged in the channel and is used for anchoring the steel strand; the bottom of the jack is clamped on the groove of the annular plate; the fastening anchorage device is used for being arranged at the telescopic end of the jack and anchoring the steel strand. The utility model discloses artificial prestressing loss appears in anchor district prestressing force among the prior art can be solved, lead to reducing the engineering security.
Description
Technical Field
The utility model relates to a stretch-draw construction appurtenance field, concretely relates to steel strand wires stretch-draw spike structure and stretch-draw ground tackle.
Background
At present, in the process of prestress construction of an anchoring area of a main tower of a bridge, construction is carried out by adopting a construction method of secondary tensioning of steel strands more and more. The construction of the secondary tensioning of the steel strand has the advantages of small prestress loss, high safety performance and the like.
However, in the process of secondary tensioning of the steel strand, the problem that the anchorage device jumps out of the groove of the anchor backing plate due to the influence of the tensioning space and the sight line often occurs, so that the artificial prestress loss occurs to the prestress of the anchoring area, the engineering safety can be reduced, the engineering service life is shortened, and finally great loss is caused to the engineering.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the prior art, the utility model aims to provide a steel strand wires stretch-draw spike structure and stretch-draw ground tackle can solve among the prior art anchor district prestressing force and appear artificial prestressing loss, leads to reducing the engineering security.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
in one aspect, the utility model provides a steel strand wires stretch-draw spike structure, include:
the middle part of the annular plate is provided with a through hole, and one side of the annular plate is provided with a groove with the diameter larger than that of the through hole;
and one end of the arc-shaped supporting structure is arranged on the other side of the annular plate, the other end of the arc-shaped supporting structure is used for abutting against the concrete structure, a channel for the steel strand to pass through is reserved in the middle of the arc-shaped supporting structure, and an opening is reserved in the side surface of the arc-shaped supporting structure.
In some optional embodiments, the method further comprises: and the stiffening plates are arranged on the inner side of the arc-shaped supporting structure and are connected with the annular plate.
In some alternative embodiments, the stiffener plates have a right-angled triangle cross-section in the radial direction of the annular plate.
In some optional embodiments, the arc-shaped supporting structure comprises at least two arc-shaped supporting plates, and the arc-shaped supporting plates are circumferentially and uniformly arranged at the other side of the annular plate at intervals.
On the other hand, the utility model provides a steel strand wires stretch-draw ground tackle, include:
the middle part of the annular plate is provided with a through hole, and one side of the annular plate is provided with a groove with the diameter larger than that of the through hole;
one end of the arc-shaped supporting structure is arranged on the other side of the annular plate, the other end of the arc-shaped supporting structure is used for abutting against the concrete structure, a channel for the steel strand to pass through is reserved in the middle of the arc-shaped supporting structure, and an opening is reserved in the side face of the arc-shaped supporting structure;
the anchoring device is arranged in the channel and used for anchoring the steel strand;
the bottom of the jack is clamped on the groove of the annular plate;
and the fastening anchorage device is used for being arranged at the telescopic end of the jack and anchoring the steel strand.
In some optional embodiments, the anchoring device comprises:
a retraction anchor for anchoring on the steel strand;
the pressure-bearing nut is sleeved on the retraction anchorage device and can be adjusted in the axial direction of the steel strand to be opposite to the retraction anchorage device, so that the pressure-bearing nut is abutted against the concrete structure.
In some optional embodiments, the anchoring device further comprises a stress nut, which is sleeved on the bearing nut and used for adjusting the relative position of the bearing nut and the retraction anchor.
In some optional embodiments, the retraction anchor comprises an anchor plate and a working clamping piece, the anchor plate is provided with at least one cable hole for passing through the steel strand, and the working clamping piece is sleeved on the steel strand and clamped in the cable hole at the side close to the jack so as to clamp the anchor plate and the steel strand.
In some optional embodiments, the anchoring device further comprises a locking mechanism disposed in the channel between the retraction anchor and the annular plate for limiting the position of the working clip.
In some optional embodiments, the anti-loosening mechanism comprises:
one end of the outer sleeve is sleeved at the end part of the anchor plate, and the other end of the outer sleeve extends inwards to form a connecting plate;
and the pressing plate is arranged in the outer sleeve, is connected with the connecting plate through a connecting bolt, is positioned between the anchor plate and the connecting plate and is used for limiting the position of the working clamping piece. Compared with the prior art, the utility model has the advantages of: when the steel strand tensioning brace structure is used and secondary tensioning is needed, the arc-shaped supporting structure is sleeved on a retraction anchorage device which is anchored on the steel strand and clings to a concrete structure to be tensioned, the bottom of the jack is clamped on the groove of the annular plate, and the fastening anchorage device is anchored on the telescopic end of the jack and the steel strand. The channels of the arc-shaped supporting structures are tightly attached to the retraction anchorage devices, so that the retraction anchorage devices can be limited, and the groove jumping of the retraction anchorage devices is avoided during secondary tensioning. The bottom of the jack is clamped on the groove of the annular plate, the position of the jack can be limited, and the opening reserved on the side surface of the arc-shaped supporting structure can adjust the retraction anchor to be abutted against the concrete structure after the steel strand is tensioned and can also avoid being influenced by a tensioning space and sight lines during tensioning.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a steel strand stretching brace structure in an embodiment of the present invention;
fig. 2 is a schematic top view of a steel strand stretching brace structure in an embodiment of the present invention;
fig. 3 is a schematic structural view of a tension anchor in an embodiment of the present invention.
In the figure: 1. an annular plate; 11. a through hole; 12. a groove; 2. an arcuate support structure; 21. a channel; 22. an arc-shaped supporting plate; 3. a stiffening plate; 4. an anchoring device; 41. retracting the anchorage device; 42. a pressure-bearing nut; 43. a stress application nut; 44. a locking mechanism; 441. an outer sleeve; 442. a connecting plate; 443. pressing a plate; 444. a connecting bolt; 5. a jack; 6. a base plate; 7. a concrete structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
The embodiments of the steel strand stretching brace structure and the stretching anchor of the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, in one aspect, the utility model provides a steel strand stretching brace structure, include: an annular plate 1 and an arcuate support structure 2.
Wherein, the middle part of the annular plate 1 is provided with a through hole 11, and one side is provided with a groove 12 with the diameter larger than that of the through hole 11; one end of the arc-shaped supporting structure 2 is arranged at the other side of the annular plate 1, the other end of the arc-shaped supporting structure is used for abutting against the concrete structure 7, a channel 21 for enabling the steel strand to pass through is reserved in the middle of the arc-shaped supporting structure 2, and an opening is reserved in the side face of the arc-shaped supporting structure.
When the steel strand stretching brace structure is used and secondary stretching is needed, the arc-shaped supporting structure 2 is sleeved on a retraction anchorage device which is anchored on the steel strand and clings to a concrete structure to be stretched, the bottom of the jack 5 is clamped on the groove 12 of the annular plate 1, and the fastening anchorage device is anchored on the telescopic end of the jack 5 and the steel strand. In this example, the channel 21 of the arc-shaped support structure 2 is tightly attached to the retraction anchorage device, so that the retraction anchorage device can be limited, and the groove jumping of the retraction anchorage device during secondary tensioning is avoided. And the bottom of the jack 5 is clamped on the groove 12 of the annular plate 1, the position of the jack 5 can be limited, and the opening left on the side surface of the arc-shaped supporting structure 2 can adjust the retraction anchorage to be abutted against the concrete structure 7 after the steel strand is tensioned, and can also avoid the influence of a tensioning space and sight line during tensioning.
The tensioning steps are as follows: after the steel strand tensioning brace structure, the retracting anchorage device, the jack 5 and the fastening anchorage device are installed, the jack 5 is jacked, and in the jacking process, the position of the retracting anchorage device during tensioning is observed through an opening reserved on the side surface of the arc-shaped supporting structure 2. When the steel strand is tensioned to a set length or reaches the prestress, the retraction anchorage device is adjusted to be abutted against the concrete structure 7 through the opening reserved on the side surface of the arc-shaped supporting structure 2 to bear the prestress.
In some optional embodiments, the steel strand tensioning brace structure further comprises: the stiffening plates 3 with set number are all arranged on the inner side of the arc-shaped supporting structure 2 and are connected with the annular plate 1. In this embodiment, the stiffening plates 3 are disposed on the inner side of the arc-shaped support structure 2, which can improve the strength of the arc-shaped support structure 2.
In some alternative embodiments, the stiffening plates 3 have a cross-section in the radial direction of the annular plate 1 in the form of a right-angled triangle. In this embodiment, two right-angled sides of the stiffener 3 in the shape of a right triangle are respectively connected with the annular plate 1 and the arc-shaped supporting structure 2.
In some alternative embodiments, the arc support structure 2 comprises at least two arc supporting plates 22, and the arc supporting plates are circumferentially and uniformly spaced on the other side of the annular plate 1. In this embodiment, the arc-shaped supporting structure 2 includes two arc-shaped supporting plates 22, and the gap between two arc-shaped supporting plates 22 is the side opening of the arc-shaped supporting structure 2, and can be used for adjusting the retraction anchor to make it support on the concrete structure 7, and the gap between two arc-shaped supporting plates 22 of accessible is used as an observation channel, observes the state of the retraction anchor, avoids not discovering the problem of jumping out of time.
As shown in fig. 3 in combination with fig. 1 and 2, on the other hand, the present invention further provides a steel strand tension anchor, including: the device comprises an annular plate 1, an arc-shaped supporting structure 2, an anchoring device 4, a jack 5 and a fastening anchor.
Wherein, the middle part of the annular plate 1 is provided with a through hole 11, and one side of the annular plate is provided with a groove 12 with the diameter larger than that of the through hole 11; one end of the arc-shaped supporting structure 2 is arranged at the other side of the annular plate 1, the other end of the arc-shaped supporting structure is used for abutting against the concrete structure 7, a channel 21 for enabling the steel strand to pass through is reserved in the middle of the arc-shaped supporting structure 2, and an opening is reserved in the side face of the arc-shaped supporting structure; the anchoring device 4 is arranged in the channel 21 and is used for anchoring the steel strand; the bottom of the jack 5 is clamped on the groove 12 of the annular plate 1; the fastening anchorage device is used for being arranged at the telescopic end of the jack 5 and anchoring the steel strand.
When the steel strand tensioning anchorage is used and secondary tensioning is needed, the arc-shaped supporting structure 2 is sleeved on the anchoring device 4 which is anchored on the steel strand and clings to a concrete structure to be tensioned, the bottom of the jack 5 is clamped on the groove 12 of the annular plate 1, and the fastening anchorage is anchored on the telescopic end of the jack 5 and the steel strand. And (5) jacking the jack, and observing the position of the retracted anchorage device during tensioning through an opening reserved on the side surface of the arc-shaped supporting structure 2 in the jacking process. When the steel strand is tensioned to a set length or reaches the prestress, the retraction anchorage is adjusted through the opening reserved on the side surface of the arc-shaped supporting structure 2 to be abutted against the concrete structure 7 to bear the prestress. In this example, the channel 21 of the arc-shaped support structure 2 is tightly attached to the retraction anchorage device, so that the retraction anchorage device can be limited, and the groove jumping of the retraction anchorage device during secondary tensioning is avoided. And the bottom of the jack 5 is clamped on the groove 12 of the annular plate 1, the position of the jack 5 can be limited, and the opening left on the side surface of the arc-shaped supporting structure 2 can adjust the retraction anchorage to be abutted against the concrete structure 7 after the steel strand is tensioned, and can also avoid the influence of a tensioning space and sight line during tensioning. In the scheme, the opening is reserved on the side surface of the arc-shaped supporting structure 2, the supporting foot structure is optimized, the operation space of the anchoring device 4 is increased, and the problem that the operation space of the anchoring device 4 is small is solved.
In this example, a backing plate 6 is further arranged between the concrete structure 7 and the arc-shaped supporting structure 2, and the backing plate 6 can bear the pressure of the arc-shaped supporting structure 2 to the concrete structure 7, so that the arc-shaped supporting structure 2 is prevented from damaging the concrete structure 7.
In other embodiments, the arc-shaped supporting structure 2 may also be composed of two arc-shaped supporting plates 22, the gap between the two arc-shaped supporting plates 22 is the side opening of the arc-shaped supporting structure 2, and may be used to adjust the retraction anchor to abut against the concrete structure 7, and the gap between the two arc-shaped supporting plates 22 may be used as an observation channel to observe the state of the retraction anchor, so as to avoid the problem of groove jump which cannot be found in time.
In some alternative embodiments, the anchoring means 4 comprise: a retraction anchor 41 and a compression nut 42. Wherein, the retraction anchorage device 41 is used for anchoring on the steel strand; the pressure-bearing nut 42 is sleeved on the retraction anchorage 41, and the relative position of the pressure-bearing nut 42 and the retraction anchorage 41 can be adjusted along the axial direction of the steel strand, so that the pressure-bearing nut 42 is abutted against the concrete structure 7.
In the embodiment, the retraction anchor 41 and the bearing nut 42 are connected through threads, the relative positions of the retraction anchor 41 and the bearing nut 42 in the axial direction of the steel strand can be adjusted through the threads, and the adjusted threads can bear certain axial force. When the steel strand is stretched for the first time, the steel strand is stretched according to the conventional method, and the steel strand is stretched for the first time to reach a stress state, so that the uniform stress of the steel strand is ensured. Is anchored by the anchoring device 4, wherein the retraction anchorage 41 or the compression nut 42 is held against the concrete structure. After the second tensioning by the jack 5, the retraction anchor 41 and the bearing nut 42 are no longer held against the concrete structure 7 at this time, since the steel strand is again stretched. The pressure-bearing nut 42 and the pressure-bearing nut 42 are adjusted through the opening reserved on the side surface of the arc-shaped supporting structure 2 and are abutted against the concrete structure 7, so that the stretched steel strand cannot retract when the jack 5 is used for relieving pressure.
In some alternative embodiments, the anchoring device 4 further comprises a forcing nut 43, which is sleeved on the bearing nut 42 and is used for adjusting the relative position of the bearing nut 42 and the retraction anchorage 41. In this embodiment, the stress application nut 43 is sleeved on the bearing nut 42, so that the relative position between the bearing nut 42 and the retraction anchor 41 can be conveniently adjusted, and the problem that the bearing nut 42 is difficult to adjust in a narrow space is avoided.
In some alternative embodiments, the retraction anchor 41 comprises an anchor plate having at least one cable hole for passing the steel strand and a working clip for fitting over the steel strand and engaging in the cable hole on the side adjacent to the jack 5 to clamp the anchor plate and the steel strand.
In this embodiment, be equipped with a plurality of cable holes on the anchor slab, every cable hole is furnished with a work clamping piece, the work clamping piece is round platform shape, two four-open type, its and steel strand wires contact surface is opened there is the pawl shape screw thread, it has the elasticity groove to open on the work clamping piece, when steel strand wires atress has the removal trend to the cable hole in, the work clamping piece of cover on the steel strand wires moves to the cable hole is downthehole, receives the extrusion in cable hole, can be tighter with steel strand wires extrusion, consequently the work clamping piece is retracted and is made steel strand wires, work clamping piece and anchor slab anchor relatively.
In some alternative embodiments, the anchoring device 4 further comprises a locking mechanism 44, provided in the passage between the retraction anchorage 41 and the annular plate 1, for limiting the position of the working jaws.
In this embodiment, since the steel strand tends to move out of the cable hole during the second tensioning, the working clamping piece tends to jump out of the cable hole. Therefore, the anti-loosening mechanism 44 is arranged to limit the position of the working clamping piece, so that the working clamping piece is left in the cable hole, the steel strand, the working clamping piece and the anchor plate can move simultaneously during secondary tensioning, and the working clamping piece is prevented from jumping out of the cable hole.
In some alternative embodiments, the anti-loosening mechanism 44 includes: an outer sleeve 441 and a pressure plate 443.
One end of the outer sleeve 441 is sleeved on the end of the anchor plate, and the other end of the outer sleeve extends inwards to form a connecting plate 442; a pressure plate 443 is disposed within the outer sleeve 441 and is connected to the connecting plate 442 by a connecting bolt 444 and is positioned between the anchor plate and the connecting plate 442 for limiting the position of the working jaw.
In this embodiment, the outer sleeve 441 is sleeved on the inner side of one end of the end portion of the anchor plate, and a groove is formed in the end portion of the anchor plate, and a corresponding protrusion is formed on the anchor plate. The projection at the end of the anchor plate is snapped into the groove of the outer sleeve 441. The anti-loose mechanism 44 and the anchor plate form a relatively fixed integral body. The connecting plate 442 is a circular plate, and a through hole for allowing the steel strand to freely pass through is formed in the connecting plate, but the diameter of the through hole is smaller than that of the working clamping piece, so that the working clamping piece can be pressed, the pressing plate 443 is connected with or abutted against the connecting plate 442 through the connecting bolt 444, the pressure for pressing the working clamping piece by the pressing plate 443 can be adjusted by adjusting the extension length of the connecting bolt 444, and the working clamping piece is prevented from jumping out of the cable hole.
The following construction steps for tensioning are also provided:
stretching for the first time:
(1) after the connection of the oil pipe is checked, the oil pump is started to slightly tighten the steel strand and then the position of the jack is adjusted to make the center of the steel strand basically consistent with the axis of the channel, so that the steel strand can be freely extended, and the friction resistance is reduced.
(2) The clamping piece of the tool is adjusted to clamp the steel strand so as to ensure that the stress of each steel strand is uniform.
(3) Slowly filling oil to the main oil cylinder of the jack for tensioning, and loading to the initial tensioning stress (0.2 sigma)k) And stopping oil supply, checking that the clamping piece is in good condition, and drawing a line for marking. And measuring the exposed amount a of the oil cylinder, marking and measuring the exposed amount of the anchor clamping piece of the tool.
(4) Oil is fed to the jack and loaded to 0.4 sigmakFinally, the tension stress sigma is controlledk. And measuring the exposed amount b of the oil cylinder, marking and measuring the exposed amount of the anchor clamping piece of the tool.
(5) And closing an oil way of the main oil cylinder after the oil pressure reaches the tension control stress, holding the load for 5min, measuring and marking the exposed amount c of the oil cylinder, measuring the exposed amount of the anchor clamping piece of the tool, and checking the elongation of the steel strand. After holding the load for 5min, if the oil pressure is slightly reduced, the oil is supplemented to the oil pressure value of the designed tonnage, the jack returns oil, the clamping piece is automatically locked, and the tensioning of the bundle is finished. And measuring the exposed amount d of the oil cylinder and recording the exposed amount d in time. The total number of broken and sliding threads is not more than the specification.
Tensioning for the second time: and dismantling the working tool which is not used in the second tensioning after the first tensioning, and sequentially installing a secondary tensioning anti-loosening device, a supporting foot structure, a jack and an anchoring device. The centers of the working anchor, the supporting foot, the jack and the tool anchor are required to be positioned on the same axis, so that the secondary tensioning working anchor is prevented from jumping out of the slot of the anchor backing plate spigot.
(1) After the connection of the oil pipes is checked, an oil pump is started, the oil cylinder extends out by 5cm, the position of the jack is adjusted after the steel strand is slightly tensioned, and the center of the jack is basically consistent with the axis of the pore channel, so that the steel strand can be freely extended, and friction resistance is reduced.
(2) The clamping piece of the tool is adjusted to clamp the steel strand so as to ensure that the stress of each steel strand is uniform.
(3) And (5) closing the oil way of the main oil cylinder after the oil pressure reaches the tensioning tonnage, and holding the load for 5 min. The anchorage device leaves the end face of the anchor backing plate, and the bearing nut is screwed down by the stressing nut through the supporting leg opening.
(4) And the jack can return oil for anchoring after the nut is determined to be closely attached to the anchor backing plate and cannot be screwed.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a steel strand wires stretch-draw spike structure which characterized in that includes:
the middle of the annular plate (1) is provided with a through hole (11), and one side of the annular plate is provided with a groove (12) with the diameter larger than that of the through hole (11);
and one end of the arc-shaped supporting structure (2) is arranged on the other side of the annular plate (1), the other end of the arc-shaped supporting structure is used for abutting against the concrete structure (7), a channel (21) for enabling the steel strand to pass through is reserved in the middle of the arc-shaped supporting structure (2), and an opening is reserved in the side face of the arc-shaped supporting structure.
2. The steel strand tensioning brace construction of claim 1, further comprising: the stiffening plates (3) are arranged on the inner sides of the arc-shaped supporting structures (2) and connected with the annular plates (1).
3. A steel strand tensioning brace construction as claimed in claim 2, characterized in that the cross-section of the stiffening plate (3) in the radial direction of the annular plate (1) is in the form of a right triangle.
4. A steel strand tensioning brace construction as claimed in claim 1, wherein the arcuate support structure (2) comprises at least two arcuate support plates (22) and are circumferentially evenly spaced on the other side of the annular plate (1).
5. A steel strand tensioning anchorage, characterized by comprising:
the middle of the annular plate (1) is provided with a through hole (11), and one side of the annular plate is provided with a groove (12) with the diameter larger than that of the through hole (11);
one end of the arc-shaped supporting structure (2) is arranged on the other side of the annular plate (1), the other end of the arc-shaped supporting structure is used for being abutted against the concrete structure (7), a channel (21) for enabling the steel strand to penetrate through is reserved in the middle of the arc-shaped supporting structure (2), and an opening is reserved in the side face of the arc-shaped supporting structure;
the anchoring device (4) is arranged in the channel (21) and is used for anchoring the steel strand;
the bottom of the jack (5) is clamped on the groove (12) of the annular plate (1);
and the fastening anchorage device is used for being arranged at the telescopic end of the jack (5) and anchoring the steel strand.
6. A steel strand tensioning brace construction as claimed in claim 5, wherein the anchoring means (4) comprises:
a retraction anchorage (41), the retraction anchorage (41) for anchoring on the steel strand;
the pressure-bearing nut (42) is sleeved on the retraction anchor (41) and can adjust the relative position with the retraction anchor (41) along the axial direction of the steel strand so that the pressure-bearing nut (42) is abutted against the concrete structure (7).
7. A steel strand tensioning brace structure as claimed in claim 6, wherein the anchoring device (4) further comprises a stressing nut (43) which is fitted over the bearing nut (42) for adjusting the relative position of the bearing nut (42) and the retraction anchor (41).
8. A steel strand tensioning brace construction as claimed in claim 6, wherein the retraction anchorage (41) comprises an anchor plate provided with at least one cable hole for the passage of the steel strand and a working jaw for fitting over the steel strand and for being clamped in a cable hole on the side close to the jack (5) for clamping the anchor plate and the steel strand.
9. A steel strand tensioning brace construction as claimed in claim 8, wherein the anchoring device (4) further comprises a locking mechanism (44) provided in the passage between the retraction anchor (41) and the annular plate (1) for limiting the position of the working jaw.
10. A steel strand tensioning brace construction as claimed in claim 9, wherein the anti-loosening mechanism (44) comprises:
an outer sleeve (441) with one end sleeved on the end of the anchor plate and the other end extending inwards to form a connecting plate (442);
and a pressing plate (443) which is arranged in the outer sleeve (441), is connected with the connecting plate (442) through a connecting bolt (444), and is positioned between the anchor plate and the connecting plate (442) and used for limiting the position of the working clamping piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120789889.1U CN215164737U (en) | 2021-04-16 | 2021-04-16 | Steel strand stretching brace structure and stretching anchorage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120789889.1U CN215164737U (en) | 2021-04-16 | 2021-04-16 | Steel strand stretching brace structure and stretching anchorage device |
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| Publication Number | Publication Date |
|---|---|
| CN215164737U true CN215164737U (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120789889.1U Active CN215164737U (en) | 2021-04-16 | 2021-04-16 | Steel strand stretching brace structure and stretching anchorage device |
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| Country | Link |
|---|---|
| CN (1) | CN215164737U (en) |
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2021
- 2021-04-16 CN CN202120789889.1U patent/CN215164737U/en active Active
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