CN114135058A - Grouting-free low-retraction anchor cable system - Google Patents
Grouting-free low-retraction anchor cable system Download PDFInfo
- Publication number
- CN114135058A CN114135058A CN202110522660.6A CN202110522660A CN114135058A CN 114135058 A CN114135058 A CN 114135058A CN 202110522660 A CN202110522660 A CN 202110522660A CN 114135058 A CN114135058 A CN 114135058A
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- Prior art keywords
- anchor
- cable body
- hole
- retraction
- anchor head
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a grouting-free low-retraction anchor cable system which comprises an anchor, a cable body and a heat-shrinkable sleeve, wherein the anchor comprises a tensioning-end anchor and a fixed-end anchor, and the cable body comprises a protective sleeve, anti-corrosion grease and a steel strand. One end of the cable body is provided with an anchorage device at the tensioning end, and the other end of the cable body can be provided with an anchorage device at the fixed end and also can be provided with an anchorage device at the tensioning end. The tensioning end anchorage device comprises an anchor head, a bearing nut and a steel base plate. A first inner hole is drilled in the end face of one end of the anchor head, and the head of the cable body is inserted into the first inner hole and is fastened and connected. The invention has the beneficial effects that: the problems of overlarge retraction value and incompact pore channel grouting of the conventional anchorage device are solved, and the problem caused by easy fracture of the prestressed steel bar during tensioning is also avoided.
Description
Technical Field
The invention relates to an anchor cable system, in particular to a grouting-free low-retraction anchor cable system.
Background
At present, clip type anchorage devices for prestressed tendons, prestressed steel bars and finish-rolled deformed steel bars are mainly adopted in short-beam prestress at home and abroad, and the defects that the prestressed steel bars are easy to generate stress concentration due to self structure, the tendons are easy to break in the using process and the repair is extremely difficult exist; the finish-rolled deformed steel bar has low strength and large retraction value, and influences the engineering quality and the service life of the bridge; the prestressed clip type anchorage has the problems of large stretching retraction amount and incompact grouting after stretching, and the service life of prestressed tendons is influenced; the prestressed tendon clamping piece type low-retraction anchorage device adopts a secondary tensioning construction process, and is inconvenient to operate.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a grouting-free low-retraction anchor cable system.
The invention provides a grouting-free low-retraction anchor cable system which comprises an anchor, a cable body and a heat-shrinkable sleeve, wherein the anchor comprises a tensioning-end anchor and a fixed-end anchor, the anchor consists of a protective sleeve, anti-corrosion grease and a steel strand, one end of the cable body is provided with the tensioning-end anchor, the other end of the cable body is provided with the fixed-end anchor, and the tensioning-end anchor can also be arranged. The tensioning end anchorage device comprises an anchor head, a bearing nut and a steel base plate. A first inner hole is drilled in the end face of one end of the anchor head, and the head of the cable body is inserted into the first inner hole and is fastened and connected.
As a further improvement of the invention, the cable body comprises a steel strand, anticorrosive grease and a protective sleeve, and the anticorrosive grease is filled between the steel strand and the protective sleeve.
As a further improvement of the invention, the tensioning end anchorage comprises an anchor head, a steel backing plate and a bearing nut, wherein a first inner hole is drilled on the end face of one end of the anchor head, the head of the cable body is inserted into the first inner hole to be fastened and connected, an external thread is arranged on the outer surface of the other end of the cable body, a second inner hole is arranged on the steel backing plate, an external thread section of the anchor head penetrates through the second inner hole, the bearing nut is in threaded connection with the external thread of the anchor head, and the bearing nut is tightly attached to the end face of the steel backing plate.
As a further improvement of the invention, the steel backing plate is positioned between the bearing nut and the cable body.
As a further improvement of the invention, an orifice of the second inner hole is provided with a chamfer, the chamfer is close to the first inner hole of the anchor head, the aperture of the second inner hole is larger than the outer diameter of the anchor head, the outer diameter of the bearing nut is larger than the aperture of the second inner hole, the second inner hole is a through hole, and the first inner hole is a blind hole.
As a further improvement of the invention, the aperture of the first inner hole is larger than the outer diameter of the cable body.
As a further improvement of the invention, a heat-shrinkable sleeve is arranged at the joint of the anchor head and the cable body.
As a further improvement of the invention, the cable body can be a single steel strand or a plurality of steel strands.
The invention has the beneficial effects that: the method solves the quality problems caused by the overlarge retraction value of the conventional anchorage device and the incompact pore grouting in the prestressed concrete structure, and also avoids the quality problems caused by the easy fracture of the prestressed steel bar during tensioning.
Drawings
Fig. 1 is a schematic view of a grouting-free low-retraction anchor cable system according to the present invention.
Fig. 2 is a schematic view of a tensioning end anchor of a grouting-free low-retraction anchor cable system according to the present invention.
Fig. 3 is a schematic view of a grouting-free low-retraction anchor cable system of the present invention after installation of a heat-shrinkable sleeve.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
As shown in fig. 1 to 3, a grouting-free low-retraction anchor cable system comprises an anchorage device 1 at a tensioning end, a heat-shrinkable sleeve 2 and a cable body 3, wherein one end of the anchorage device 1 is an anchorage device containing the tensioning end, the other end of the anchorage device 1 can be the anchorage device at the tensioning end or a fixed end, and the anchorage device 11 at the tensioning end comprises an anchor head 11-1, a bearing nut 11-2 and a steel backing plate 11-3. The anchor head 11-1 is provided with a first inner hole on one end face of the anchor head, and the head of the cable body 3 is inserted into the first inner hole and is fastened and connected.
The cable body 3 comprises a steel strand 3-1, anticorrosive grease 3-2 and a protective sleeve 3-3, and the anticorrosive grease 3-2 is filled between the steel strand 3-1 and the protective sleeve 3-3.
The tensioning end anchorage device comprises an anchor head 11-1, a steel backing plate 11-2 and a bearing nut 11-3, wherein a first inner hole is drilled in one end face of the anchor head 11-1, the head of the cable body 3 is inserted into the first inner hole and is fastened and connected, an external thread is arranged on the outer surface of the other end of the cable body, a second inner hole is formed in the steel backing plate 11-3, an external thread section of the anchor head 11-1 penetrates through the second inner hole, the bearing nut 11-2 is in threaded connection with the external thread of the anchor head 11-1, and the bearing nut 11-2 is tightly attached to the end face of the steel backing plate 11-3.
The steel backing plate 11-3 is positioned between the bearing nut 11-2 and the cable body 3.
The hole opening of the second inner hole in the steel base plate 11-3 is provided with a chamfer, the chamfer is close to the first inner hole of the anchor head 11-1, the hole diameter of the second inner hole in the steel base plate 11-3 is larger than the outer diameter of the anchor head 11-1, and the outer diameter of the bearing nut 11-2 is larger than the hole diameter of the second inner hole in the steel base plate 11-3.
The second inner hole on the steel backing plate 11-3 is a through hole, and the first inner hole on the anchor head 11-1 is a blind hole.
The connecting part of the anchor head 11-1 and the cable body 3 is provided with a heat shrinkable sleeve 2.
The steel shim plate 11-3 is a round or polygonal steel plate with a certain thickness.
The grouting-free low-retraction anchor cable system provided by the invention has the following advantages:
1. the prestressed reinforcing steel adopts high-strength steel strands, and compared with a finish rolling deformed steel anchor and a prestressed steel bar, the material is saved;
2. the standard thread knob is adopted for follow-up after the first tensioning, the second tensioning is not needed, the operation is simple, and the problem that the retraction value of the conventional anchor is overlarge is solved;
3. can adopt the construction of unbonded, avoided the not closely knit risk that leads to prestressed reinforcement corrosion fracture of grout.
The grouting-free low-retraction anchor cable system provided by the invention can be applied to the fields of concrete bridges, building structures, slope rock-soil anchoring, hanging basket anchoring and the like.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (6)
1. The utility model provides a low anchor rope system that contracts of exempting from to grout, includes ground tackle and cable body, pyrocondensation cover, ground tackle contains stretch-draw end ground tackle and stiff end ground tackle, the cable body includes protective sheath, anticorrosive grease, steel strand wires, stretch-draw end ground tackle is all installed at the both ends of the cable body, perhaps, stretch-draw end ground tackle is installed to one of them end of the cable body, stiff end ground tackle is installed to the other end of the cable body.
2. The grouting-free low-retraction anchor cable system as claimed in claim 1, wherein: and anti-corrosion grease is filled between the steel strand and the protective sleeve.
3. The grouting-free low-retraction anchor cable system as claimed in claim 1, wherein: the tension end anchorage device comprises an anchor head, a steel base plate and a bearing nut, wherein a first inner hole is formed in one end face of the anchor head, the head of the cable body is inserted into the first inner hole to be fastened and connected, an external thread is arranged on the outer surface of the other end of the anchor head, a second inner hole is formed in the steel base plate, an external thread section of the anchor head penetrates through the second inner hole, the bearing nut is connected with the external thread of the anchor head in a threaded mode, and the bearing nut is tightly attached to the end face of the steel base plate.
4. The grout-free low retraction anchor cable system of claim 3, wherein: the steel backing plate is positioned between the bearing nut and the cable body.
5. The grout-free low retraction anchor cable system of claim 3, wherein: the drill way of second hole is equipped with the chamfer, the chamfer is close to the first hole of anchor head, the aperture of second hole is greater than the external diameter of anchor head, the external diameter of bearing nut is greater than the aperture of second hole, the second hole is the through-hole, first hole is the blind hole.
6. The grouting-free low-retraction anchor cable system as claimed in claim 1, wherein: and a heat-shrinkable sleeve is arranged at the joint of the anchor head and the cable body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110522660.6A CN114135058A (en) | 2021-05-13 | 2021-05-13 | Grouting-free low-retraction anchor cable system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110522660.6A CN114135058A (en) | 2021-05-13 | 2021-05-13 | Grouting-free low-retraction anchor cable system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114135058A true CN114135058A (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110522660.6A Pending CN114135058A (en) | 2021-05-13 | 2021-05-13 | Grouting-free low-retraction anchor cable system |
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| Country | Link |
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| CN (1) | CN114135058A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2581508Y (en) * | 2002-07-30 | 2003-10-22 | 江苏法尔胜新日制铁缆索有限公司 | High-fitigue strength cold-hot mould anchor |
| JP2006112189A (en) * | 2004-10-18 | 2006-04-27 | Kazuo Kazama | Tensional material anchoring tool |
| CN203034689U (en) * | 2013-01-11 | 2013-07-03 | 柳州欧维姆机械股份有限公司 | Waterproofing device of single steel strand tie bar rope at anchoring region inlet |
| CN203174889U (en) * | 2013-03-26 | 2013-09-04 | 天津圣文预应力机械有限公司 | Extrusion screw anchorage device |
| CN103850181A (en) * | 2014-01-28 | 2014-06-11 | 柳州欧维姆机械股份有限公司 | Separable sealing structure of dragline anchor and method for realizing sealing of anchor |
| CN205558044U (en) * | 2016-01-28 | 2016-09-07 | 开封市天力桥建工程结构有限公司 | Parallel steel strand wires cable of chill casting extrusion anchor formula |
| CN110924594A (en) * | 2019-12-26 | 2020-03-27 | 天津鹏旭预应力机械有限公司 | Unbonded prestressed anchorage device anticorrosion structure |
| CN112593660A (en) * | 2020-12-11 | 2021-04-02 | 柳州欧维姆机械股份有限公司 | Extrusion anchorage sleeve inhaul cable and manufacturing method thereof |
| CN217268360U (en) * | 2021-05-13 | 2022-08-23 | 柳州市桥厦工程管材有限公司 | Grouting-free low-retraction anchor cable system |
-
2021
- 2021-05-13 CN CN202110522660.6A patent/CN114135058A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2581508Y (en) * | 2002-07-30 | 2003-10-22 | 江苏法尔胜新日制铁缆索有限公司 | High-fitigue strength cold-hot mould anchor |
| JP2006112189A (en) * | 2004-10-18 | 2006-04-27 | Kazuo Kazama | Tensional material anchoring tool |
| CN203034689U (en) * | 2013-01-11 | 2013-07-03 | 柳州欧维姆机械股份有限公司 | Waterproofing device of single steel strand tie bar rope at anchoring region inlet |
| CN203174889U (en) * | 2013-03-26 | 2013-09-04 | 天津圣文预应力机械有限公司 | Extrusion screw anchorage device |
| CN103850181A (en) * | 2014-01-28 | 2014-06-11 | 柳州欧维姆机械股份有限公司 | Separable sealing structure of dragline anchor and method for realizing sealing of anchor |
| CN205558044U (en) * | 2016-01-28 | 2016-09-07 | 开封市天力桥建工程结构有限公司 | Parallel steel strand wires cable of chill casting extrusion anchor formula |
| CN110924594A (en) * | 2019-12-26 | 2020-03-27 | 天津鹏旭预应力机械有限公司 | Unbonded prestressed anchorage device anticorrosion structure |
| CN112593660A (en) * | 2020-12-11 | 2021-04-02 | 柳州欧维姆机械股份有限公司 | Extrusion anchorage sleeve inhaul cable and manufacturing method thereof |
| CN217268360U (en) * | 2021-05-13 | 2022-08-23 | 柳州市桥厦工程管材有限公司 | Grouting-free low-retraction anchor cable system |
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Application publication date: 20220304 |