CN218462543U - Prestressed tensioning and recovering device for concrete prefabricated part - Google Patents
Prestressed tensioning and recovering device for concrete prefabricated part Download PDFInfo
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- CN218462543U CN218462543U CN202222727145.4U CN202222727145U CN218462543U CN 218462543 U CN218462543 U CN 218462543U CN 202222727145 U CN202222727145 U CN 202222727145U CN 218462543 U CN218462543 U CN 218462543U
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Abstract
The utility model provides a precast concrete component prestressing force stretch-draw and recovery unit for carry out stretch-draw and recovery to the reinforcing bar among the precast concrete component, precast concrete component includes along vertical setting's anchor section and free segment, pre-buried a plurality of there being bonding finish-binding twisted steel in the anchor section, pre-buried a plurality of there being no bonding finish-binding twisted steel in the free segment, there being bonding finish-binding twisted steel and no bonding finish-binding twisted steel one-to-one and through connector threaded connection, the device includes stretch-draw nut, twisted piece and locating part, stretch-draw nut is twisted on no bonding finish-binding twisted steel, twisted piece is used for rotatory stretch-draw nut, the locating part is fixed on no bonding finish-binding twisted steel; can stretch-draw to unbonded finish tie twisted steel when revolving to a dextrorotation stretch-draw nut, when revolving to a levogyration stretch-draw nut, can make unbonded finish tie twisted steel deviate from the connector with the locating part together, realized unbonded finish tie twisted steel's recovery.
Description
Technical Field
The utility model relates to a civil engineering construction technical field especially relates to a precast concrete component prestressing force is stretched and is drawn and recovery unit.
Background
Foundation pit enclosure concrete member is mostly temporary structure like drilling bored concrete pile and prefabricated component, and the underground works construction is accomplished the back, and the mission is just accomplished to the concrete member, no longer plays a role, can keep somewhere usually in the soil body, causes huge material and wasting of resources. If the stressed reinforcing steel bars in the concrete member can be recycled, a large amount of resources can be saved, and the foundation pit support cost is reduced.
Therefore, how to recover the stressed steel bars in the foundation pit enclosure concrete member is one of the research focuses in the current foundation pit engineering technology.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a precast concrete component prestressing force stretch-draw and recovery unit can realize the recovery of atress reinforcing bar among the precast concrete component, reduces the cost of foundation ditch enclosure.
In order to achieve the above object, the present invention provides a prestressed tensioning and recovering device for a concrete prefabricated component, which is used for tensioning and recovering steel bars in the concrete prefabricated component, wherein the concrete prefabricated component includes an anchoring section and a free section which are vertically arranged, a plurality of bonded fine-pitch twisted steel bars are vertically pre-embedded in the anchoring section, a plurality of unbonded fine-pitch twisted steel bars are vertically pre-embedded in the free section, the bonded fine-pitch twisted steel bars and the unbonded fine-pitch twisted steel bars are in one-to-one correspondence and are connected through a connector thread, and the device includes a tensioning nut, a screwing piece and a limiting piece, the tensioning nut is screwed on the unbonded fine-pitch twisted steel bars, the screwing piece is used for rotating the tensioning nut, and the limiting piece is fixed on the unbonded fine-pitch twisted steel bars and is located at one end of the tensioning nut which is far away from the concrete prefabricated component;
when screwing the right hand of piece can be right when stretch-draw nut unbonded finish twist twisted steel bar carries out stretch-draw, when screwing the left hand of piece can make unbonded finish twist twisted steel bar follow during the stretch-draw nut connector is deviate from.
Optionally, concrete prefabricated component prestressing force stretch-draw and recovery unit still includes the bearing plate, the bearing plate is pre-buried in the free section, unbonded finish tie twisted steel is along vertical running through the bearing plate, it is right when unbonded finish tie twisted steel carries out the stretch-draw nut with bearing plate looks butt.
Optionally, the bearing plate is embedded in the free section, and the upper surface of the bearing plate is flush with the upper surface of the free section.
Optionally, the pressure bearing plate has a limiting groove, and the tensioning nut has an abutting portion adapted to the limiting groove.
Optionally, the limiting groove is in a cup shape.
Optionally, the limiting member is a limiting nut adapted to the unbonded fine-rolled twisted steel bar.
Optionally, a fastening gasket is arranged between the tensioning nut and the limiting nut.
Optionally, the screwing element is a hollow hydraulic wrench.
The utility model provides a pair of among concrete prefabricated component prestressing force stretch-draw and recovery unit, through revolve wrong piece dextrorotation stretch-draw nut can be right unbonded finish tie twisted steel carries out the stretch-draw, works as revolve wrong piece levogyration can make during the stretch-draw nut unbonded finish tie twisted steel is followed deviate from in the connector, and then realized right unbonded finish tie twisted steel's recovery, whole device simple structure, design benefit has effectively reduced the cost of foundation ditch enclosure.
Drawings
Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:
fig. 1 is a schematic view of a concrete prefabricated part according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a prestressed tensioning and recycling device for a concrete prefabricated component according to an embodiment of the present invention;
fig. 3 is a schematic view of the pre-stressed tension and recovery device for concrete prefabricated parts according to an embodiment of the present invention.
In the drawings:
1-an anchoring section; 2-a free segment; 3-binding fine-rolled twisted steel bars; 4-no binding fine binding twisted steel; 5-a connector; 6-tensioning the nut; 7-a limiting member; 8-a pressure bearing plate; 9-limiting groove.
Detailed Description
To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and are not to precise scale, and are provided for convenience and clarity in order to assist in describing embodiments of the present invention. To make the objects, features and advantages of the present invention more comprehensible, please refer to the accompanying drawings. It should be understood that the drawings attached to the present specification are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not intended to limit the scope of the present invention, and any modifications of the structure, changes of the proportion relation or adjustments of the size should still fall within the scope of the present invention, which can be covered by the present invention, under the same or similar conditions as the present invention can produce the effect and the purpose.
As used in this application, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this disclosure, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. As used in the present application, the term "plurality" is generally used in a sense including "at least one" unless the content clearly dictates otherwise. As used in the present application, the term "at least two" is generally used in a sense including "two or more" unless the content clearly dictates otherwise. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or at least two of the features.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
Referring to fig. 1 to 3, fig. 1 is a schematic view of a concrete prefabricated component according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a prestressed tensioning and recycling device for a concrete prefabricated part according to an embodiment of the present invention; fig. 3 is a schematic view of the pre-stressed tension and recovery device for concrete prefabricated parts according to an embodiment of the present invention. The embodiment provides a prestressed tensioning and recycling device for a concrete prefabricated part, which is used for tensioning and recycling steel bars in the concrete prefabricated part, wherein the concrete prefabricated part comprises an anchoring section 1 and a free section 2 which are vertically arranged, a plurality of bonded fine-pitch twisted steel bars 3 are vertically pre-embedded in the anchoring section 1, a plurality of unbonded fine-pitch twisted steel bars 4 are vertically pre-embedded in the free section 2, the bonded fine-pitch twisted steel bars 3 and the unbonded fine-pitch twisted steel bars 4 correspond to each other one by one and are in threaded connection through a connector 5, the prestressed tensioning and recycling device for the concrete prefabricated part comprises a nut 6, a screwing piece (not shown in a tensioning figure) and a limiting piece 7, the tensioning nut 6 is screwed on the unbonded fine-pitch twisted steel bars 4, the screwing piece is used for rotating the tensioning nut 6, and the limiting piece 7 is fixed on the unbonded fine-pitch twisted steel bars 4 and is located at one end of the tensioning nut, which is far away from the concrete prefabricated part;
when the screwing piece rotates rightwards and the tensioning nut 6, the unbonded fine-pitch threaded steel bar 4 can be tensioned, and when the screwing piece rotates leftwards and the tensioning nut 6, the unbonded fine-pitch threaded steel bar 4 can be separated from the connector 5.
The utility model discloses a principle lies in, work as revolve wrong dextrorotation when stretch-draw nut 6, stretch-draw nut 6 is relative unbonded finish tie twisted steel 4 closes downwards soon, works as stretch-draw nut 6 rotatory to with during the concrete surface of free section 2 or the bearing plate 8 butt of mentioning at the back, continue rotatory this moment stretch-draw nut 6, stretch-draw nut 6 can to unbonded finish tie twisted steel 4 applys an ascending prestressing force. After the construction is accomplished, through revolve wrong piece levogyration stretch-draw nut 6 can release prestressing force on the unbonded finish rolling twisted steel 4, through this moment stretch-draw nut 6's top is fixed a locating part 7, makes stretch-draw nut 6 can't be relative unbonded finish rolling twisted steel 4 makes progress and closes, so pass through it continues the levogyration to revolve wrong piece during stretch-draw nut 6, stretch-draw nut 6 can drive unbonded finish rolling twisted steel 4 is rotatory in the lump, until unbonded finish rolling twisted steel 4 is followed deviate from in the connector 5, thereby realize unbonded finish rolling twisted steel 4's recovery, whole device simple structure, design benefit has effectively reduced the cost of foundation ditch enclosure. On the contrary, if the limiting member 7 is not fixed on the unbonded fine-pitch twisted steel 4, when the tensioning nut 6 is screwed left by the screwing member, the tensioning nut 6 moves upward relative to the unbonded fine-pitch twisted steel 4 and gradually separates from the unbonded fine-pitch twisted steel 4.
It should be understood that "right-handed" and "left-handed" are mentioned herein for convenience of description, and represent two opposite directions of rotation, rather than limiting the actual direction of rotation. Furthermore, the "left-hand" should correspond to the direction in which the unbonded finish-threaded steel bar 4 is disengaged from the connector 5.
Specifically, please refer to fig. 1, the precast concrete component includes an anchoring section 1 and a free section 2 which are vertically arranged, a plurality of bonded fine-pitch twisted steel bars 3 are vertically pre-embedded in the anchoring section 1, a plurality of unbonded fine-pitch twisted steel bars 4 are vertically pre-embedded in the free section 2, the bonded fine-pitch twisted steel bars 3 and the unbonded fine-pitch twisted steel bars 4 are in one-to-one correspondence and are in threaded connection through connectors 5, the connectors 5 are special connectors 5 for common fine-pitch twisted steel bars on the market, and internal threads for connecting the bonded fine-pitch twisted steel bars 3 and the unbonded fine-pitch twisted steel bars 4 are arranged at two ends of the connectors 5.
In this embodiment, have bonding finish rolling twisted steel 3 with no bonding finish rolling twisted steel 4 is the atress reinforcing bar, having bonding finish rolling twisted steel 3 to be conventional finish rolling twisted steel, its reinforcing bar main part is direct to contact with the concrete, can guarantee the reinforcing bar main part with sufficient cohesive force has between the concrete, realizes common atress. And the unbonded finish rolling twisted steel comprises a steel bar main body, an inner sheath and an outer sheath, wherein the inner sheath is sleeved outside the steel bar main body, and the outer sheath is sleeved outside the inner sheath and can slide relative to the inner sheath under the action of external force. By adopting the unbonded finish-rolled twisted steel 4, not only can the cracks be effectively controlled, but also the advantage of high strength of the finish-rolled twisted steel can be fully exerted, and the steel consumption is greatly reduced. And because the inner sheath and the outer sheath of the unbonded finish-rolled twisted steel can slide relatively, after the prestress on the unbonded finish-rolled twisted steel is released, the steel body can be conveniently taken out for recycling, and the cost of foundation pit enclosure is saved.
Preferably, the precast concrete unit prestressing force stretch-draw and recovery unit further includes a bearing plate 8, the bearing plate 8 is pre-buried in the free section 2, the unbonded finish-rolled twisted steel 4 vertically penetrates through the bearing plate 8, and the stretch-draw nut 6 abuts against the bearing plate 8 when the unbonded finish-rolled twisted steel 4 is tensioned. The pressure bearing plate 8 is provided to diffuse the prestress applied by the tension nut 6, thereby preventing the concrete from being damaged due to the concentration of the prestress. In this embodiment, the bearing plate 8 is, for example, a square steel plate, which is not limited in this application.
In this embodiment, the bearing plate 8 is pre-buried in the free section 2 and the upper surface with the upper surface of free section 2 flushes, so that with stretch-draw nut 6 carries out the butt.
Preferably, the bearing plate 8 has a limit groove 9, and the tension nut 6 has an abutting portion adapted to the limit groove 9. Through setting up 9 can be better right in spacing groove stretch-draw nut 6 carries on spacingly, so that it is right to revolve wrong piece of twisting can be right during stretch-draw nut 6 it carries out the stretch-draw not to have bonding finish rolling twisted steel 4.
Further preferably, the limiting groove 9 is in a cup shape, and facilitates the diffusion of the prestress while limiting the tensioning nut 6.
In this embodiment, the limiting member 7 is a limiting nut adapted to the unbonded fine-rolled twisted steel 4. Stop nut have with the internal thread of the external screw thread looks adaptation on the fine-pitch twisted steel of unbonded 4, only need with stop nut revolve bind extremely the realization that can be convenient on the fine-pitch twisted steel of unbonded 4 is right stretch-draw nut 6 spacing.
Preferably, a fastening gasket is arranged between the tensioning nut 6 and the limiting nut. The fastening gasket is additionally arranged to improve the limiting effect on the tensioning nut 6.
Preferably, the screwing piece is a hollow hydraulic wrench.
Based on this, with reference to fig. 1 to fig. 3, the present embodiment further provides a method for prestressed tensioning and recycling of a concrete prefabricated component, which utilizes the apparatus for prestressed tensioning and recycling of a concrete prefabricated component as described above to perform prestressed tensioning and recycling of a concrete prefabricated component, and includes the following steps:
s1, screwing a tensioning nut 6 on an unbonded fine-pitch threaded steel bar 4 of the concrete prefabricated part, and enabling a screwing piece to rotate the tensioning nut 6 rightwards to tension the unbonded fine-pitch threaded steel bar 4;
s2, after tensioning is finished, inserting the concrete prefabricated part into cement soil;
s3, after the cement soil is maintained to meet design requirements, excavating a foundation pit and constructing an underground structure;
s4, completing construction of the underground structure, and after backfilling a fertilizer tank, enabling the screwing piece to rotate the tensioning nut 6 leftwards to release the prestress of the unbonded fine-rolled twisted steel bar 4;
s5, fixing a limiting piece 7 on the unbonded fine-pitch threaded steel bar 4, and continuing to enable the screwing piece to rotate the tensioning nut 6 leftwards so as to enable the unbonded fine-pitch threaded steel bar 4 to be separated from the connector 5;
and S6, recovering the unbonded and finely-rolled twisted steel bars 4.
In this embodiment, after the prefabrication of the concrete prefabricated part is completed, the concrete prefabricated part is prestressed and tensioned and then inserted into cement soil.
In this embodiment, the concrete prefabricated parts may be inserted to a predetermined depth of the cement soil by means of stirring implantation or drilling implantation.
In this embodiment, it is right when precast concrete component prefabricates, can be in precast concrete component's a pre-buried bearing plate 8 in the free section 2 makes unbonded finish tie twisted steel 4 along vertical running through bearing plate 8, and right when unbonded finish tie twisted steel 4 carries out the stretch-draw tensioning nut 6 with 8 looks butts of bearing plate.
To sum up, the embodiment of the utility model provides a concrete prefabricated component prestressing force stretch-draw and recovery unit works as it revolves to revolve wrong piece dextrorotation stretch-draw nut 6 time can be right unbonded finish tie twisted steel 4 carries out the stretch-draw, works as it revolves to revolve wrong piece levogyration can make during stretch-draw nut 6 unbonded finish tie twisted steel 4 is followed deviate from in the connector 5, and then realized right unbonded finish tie twisted steel 4's recovery, whole device simple structure, design benefit has effectively reduced the cost of foundation ditch enclosure.
The above description is only for the description of the preferred embodiments of the present invention, and not for any limitation of the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure all belong to the protection scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations fall within the scope of the present invention and the equivalent technology thereof, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A prestressed tensioning and recovery device for a concrete prefabricated part is used for tensioning and recovering steel bars in the concrete prefabricated part, the concrete prefabricated part comprises an anchoring section and a free section which are vertically arranged, a plurality of bonded fine-pitch twisted steel bars are vertically pre-embedded in the anchoring section, a plurality of unbonded fine-pitch twisted steel bars are vertically pre-embedded in the free section, the bonded fine-pitch twisted steel bars and the unbonded fine-pitch twisted steel bars are in one-to-one correspondence and are in threaded connection through connectors, the prestressed tensioning and recovery device is characterized by comprising a tensioning nut, a screwing piece and a limiting piece, the tensioning nut is screwed on the unbonded fine-pitch twisted steel bars, the screwing piece is used for rotating the tensioning nut, and the limiting piece is fixed on the unbonded fine-pitch twisted steel bars and is positioned at one end, deviating from the concrete prefabricated part, of the tensioning nut;
when screwing the piece and rightly screwing the tensioning nut, the unbonded fine-binding threaded steel bar can be tensioned, and when screwing the piece and leftwards screwing the tensioning nut, the unbonded fine-binding threaded steel bar can be separated from the connector.
2. The pre-stressed stretching and recovering device for the concrete prefabricated part according to claim 1, further comprising a bearing plate, wherein the bearing plate is pre-embedded in the free section, the unbonded threaded rebar vertically penetrates through the bearing plate, and the tensioning nut abuts against the bearing plate when the unbonded threaded rebar is tensioned.
3. The pre-stressed tension and recovery apparatus for concrete precast elements according to claim 2, wherein the bearing plate is pre-buried in the free section and has an upper surface flush with an upper surface of the free section.
4. The pre-stressed tension and recovery device for concrete prefabricated parts according to claim 2, wherein said bearing plate has a limiting groove, and said tension nut has an abutment portion fitted to said limiting groove.
5. The pre-stressed tension and recovery device for concrete precast elements according to claim 4, wherein the limiting groove is formed in a cup shape.
6. The pre-stressed tension and recovery apparatus for concrete precast elements according to claim 1, wherein the stopper is a stopper nut fitted to the unbonded fine twisted steel.
7. The pre-stressed tension and recovery device for concrete prefabricated parts according to claim 6, wherein a fastening washer is disposed between the tension nut and the limiting nut.
8. The pre-stressed tension and recovery device for concrete precast elements according to claim 1, wherein the screw is a hollow hydraulic wrench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222727145.4U CN218462543U (en) | 2022-10-17 | 2022-10-17 | Prestressed tensioning and recovering device for concrete prefabricated part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222727145.4U CN218462543U (en) | 2022-10-17 | 2022-10-17 | Prestressed tensioning and recovering device for concrete prefabricated part |
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| Publication Number | Publication Date |
|---|---|
| CN218462543U true CN218462543U (en) | 2023-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222727145.4U Active CN218462543U (en) | 2022-10-17 | 2022-10-17 | Prestressed tensioning and recovering device for concrete prefabricated part |
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|---|---|
| CN (1) | CN218462543U (en) |
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- 2022-10-17 CN CN202222727145.4U patent/CN218462543U/en active Active
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