CN204626260U - A kind of construction equipment of box bridge vertical prestressing steel strand tension - Google Patents
A kind of construction equipment of box bridge vertical prestressing steel strand tension Download PDFInfo
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- CN204626260U CN204626260U CN201520318787.6U CN201520318787U CN204626260U CN 204626260 U CN204626260 U CN 204626260U CN 201520318787 U CN201520318787 U CN 201520318787U CN 204626260 U CN204626260 U CN 204626260U
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- stretch
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- steel strand
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Abstract
The utility model discloses a kind of construction equipment of box bridge vertical prestressing steel strand tension, the stretch-draw anchor cup it is characterized in that comprising anchor plate, being provided with work clip sheet, back nut, limiting plate, overall jack, stretch-draw spike and be provided with the moveable anchor of tool clamping piece; Described stretch-draw anchor cup is located on anchor plate, back nut is enclosed within stretch-draw anchor cup, and limiting plate is located on stretch-draw anchor cup, and overall jack is located on limiting plate, moveable anchor is located on overall jack, and stretch-draw spike to be located on anchor plate and between anchor plate and overall jack.The utility model adopts integral tension jack to complete the stretch-draw overall process of many steel strand simultaneously, and have tensioning equipment single, operate easier and safety, construction precision is high, the advantage that construction cost is low.
Description
Technical field
The utility model belongs to method for bridge construction, is specifically related to a kind of construction equipment of box bridge vertical prestressing steel strand tension.
Background technology
At present, in the construction of bridge low retraction vertical prestressing steel strand tension, generally adopt the construction of two times tensioning low retraction anchoring system vertical prestressing steel strand, its first time stretch-draw adopts single cable stretching jack to be stretched to 1.0 σ com by root, to put, second time stretch-draw be stretch-draw adapter sleeve is installed, tension connecting rod, spike, overall jack, tension connecting rod nut complete two times tensioning.
The limitation of existing construction technology:
1, single tension adopts single rope jack, and two times tensioning adopts overall jack, and stretch-draw corollary equipment is many, and for preventing oil meter from damaging, the jack of a type generally need demarcate the oil meter of more than 2, and the jack of two types need demarcate the oil meter of more than 4.
2, stretch-draw adapter sleeve, tension connecting rod, stretch-draw attaching nut need be configured, in tension operation process, because these connectors belong to the instrument repeatedly used; existing external screw thread, has internal thread again, and it is improper slightly to protect; silk mouth easily sustains damage, and affects the carrying out of stretch-draw work.
3, stretch-draw jack is when upwards jacking and release are measured, gap must be had owing to being threaded, and gap progressively increases along with the Reusability of fastening means, the requirement of design second time stretch-draw anchor neck-in≤1 mm can not be met, site operation is in order to meet data requirement, have to random Update Table, cause data deficiency authenticity.
4, because stretch-draw adapter sleeve and tension connecting rod occupy most of position of cave groove, in order to expand the operating space that back nut screws, have to kickstand to prop up on the outer concrete surface of cave groove, and concrete surface is not necessarily smooth, this and support should prop up in stretch-draw plane by frame, to ensure that meeting the designing requirement vertical with backing plate face of stretch-draw axis is not inconsistent (because the impact of cave groove by concrete surface layer vertical, horizontal distribution reinforcement can not arbitrarily expand, otherwise affecting structural safety).
5, tension connecting rod is long and heavy, and efficiency of construction is low, and personnel are long in the dangerous operation district time.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of construction equipment of safer, box bridge vertical prestressing steel strand tension that convenient and quick construction, construction precision are high.
The technical scheme realizing the employing of the utility model object is as follows:
The construction equipment of box bridge vertical prestressing steel strand tension, comprises anchor plate, is provided with the stretch-draw anchor cup of work clip sheet, back nut, limiting plate, overall jack, stretch-draw spike and is provided with the moveable anchor of tool clamping piece; Described stretch-draw anchor cup is located on anchor plate, back nut is enclosed within stretch-draw anchor cup, and limiting plate is located on stretch-draw anchor cup, and overall jack is located on limiting plate, moveable anchor is located on overall jack, and stretch-draw spike to be located on anchor plate and between anchor plate and overall jack.
The beneficial effects of the utility model:
The utility model adopts integral tension jack to complete the stretch-draw overall process of three steel strand simultaneously, tensioning equipment is single, operate easier, construction cost is low, overcomes prior art and first time stretch-draw must adopt the defect of single rope jack stretching single steel strand one by one; Eliminate stretch-draw adapter sleeve that prior art must use, tension connecting rod, stretch-draw attaching nut, only retain stretch-draw anchor cup and back nut, the function of moveable anchor and the tool clamping piece automatic locking steel strand be arranged on jack is utilized to drive stretch-draw anchor cup to be upwards synchronized with the movement, then locking back nut, to realize perpetuity vertical prestressing reliable and stable, construction data is accurate, precision is high, and workmanship can well be ensured.
The technical solution of the utility model is further illustrated below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Schematic diagram when Fig. 2 is the utility model first time stretch-draw.
Schematic diagram when Fig. 3 is the stretch-draw of the utility model second time.
Different conditions schematic diagram when Fig. 4 is the stretch-draw of the utility model second time.
Detailed description of the invention
As shown in Figure 1, Figure 3, the construction equipment of box bridge vertical prestressing steel strand tension, comprises anchor plate 2, is provided with the stretch-draw anchor cup 10 of work clip sheet 9, back nut 3, limiting plate 4, overall jack 8, stretch-draw spike 11 and is provided with the moveable anchor 5 of tool clamping piece 6; Described anchor plate 2 is located on box bridge 1, stretch-draw anchor cup 10 is located on anchor plate 2, back nut 3 is enclosed within stretch-draw anchor cup 10, limiting plate 4 is located on stretch-draw anchor cup 10, overall jack 8 is located on limiting plate 4, moveable anchor 5 is located on overall jack 8, and stretch-draw spike 11 to be located on anchor plate 2 and between anchor plate 2 and overall jack 8.
The construction method of the utility model tension steel strand is as follows:
First time stretch-draw, see Fig. 2, start overall jack 8 upwards jacking tool anchor 5, by tool clamping piece 6 integral tension three steel strand 7 power muscle to the stress value 1.05 σ con designed, hold lotus 2min, put and open, make work clip sheet 9 anchoring whole steel strand power muscle by stretch-draw anchor cup 10, unload overall jack 8 and limiting plate 4;
Second time stretch-draw: see Fig. 3, treat that work clip sheet 9 anchoring bounces back, interval is after 48 hours, stretch-draw spike 11 is set between anchor plate 2 and overall jack 8, see Fig. 4, again start jack 8 upwards jacking tool anchor 5 and tool clamping piece 6, along with the increase of jack 8 pressure, after tool clamping piece 6 automatic locking steel strand 7, stretching force is produced to whole rope steel strand, because work clip sheet 9 in lower end stretch-draw anchor cup 10 is locked on steel strand 7 when first time stretch-draw is put, therefore work clip sheet 7 drives stretch-draw anchor cup 10 and back nut 3 to be upwards synchronized with the movement, will with group steel strand 7 integral tension to 1.0 σ com, steel strand 7 are made to drive stretch-draw anchor cup 10 to rise 3 ~ 10mm, hold lotus 2min, back nut 3 on downward turn-knob stretch-draw anchor cup 10 contacts to anchor plate 2, eliminate the gap between back nut 3 lower surface and stretching end anchor plate 2, put and open.
Claims (1)
1. a construction equipment for box bridge vertical prestressing steel strand tension, the stretch-draw anchor cup it is characterized in that comprising anchor plate, being provided with work clip sheet, back nut, limiting plate, overall jack, stretch-draw spike and be provided with the moveable anchor of tool clamping piece; Described stretch-draw anchor cup is located on anchor plate, back nut is enclosed within stretch-draw anchor cup, and limiting plate is located on stretch-draw anchor cup, and overall jack is located on limiting plate, moveable anchor is located on overall jack, and stretch-draw spike to be located on anchor plate and between anchor plate and overall jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318787.6U CN204626260U (en) | 2015-05-18 | 2015-05-18 | A kind of construction equipment of box bridge vertical prestressing steel strand tension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318787.6U CN204626260U (en) | 2015-05-18 | 2015-05-18 | A kind of construction equipment of box bridge vertical prestressing steel strand tension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204626260U true CN204626260U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520318787.6U Active CN204626260U (en) | 2015-05-18 | 2015-05-18 | A kind of construction equipment of box bridge vertical prestressing steel strand tension |
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| CN (1) | CN204626260U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166489A (en) * | 2017-12-27 | 2018-06-15 | 中国科学院武汉岩土力学研究所 | New Anchor Cable tensioner and anchor cable two times tensioning system |
| CN108166490A (en) * | 2017-12-27 | 2018-06-15 | 中国科学院武汉岩土力学研究所 | Hung and buckled anchor cable tensioning machine tool and anchor cable two times tensioning system |
| CN110644366A (en) * | 2019-09-06 | 2020-01-03 | 中铁大桥(郑州)缆索有限公司 | Stay cable tensioning device for narrow anchoring space and operation method thereof |
-
2015
- 2015-05-18 CN CN201520318787.6U patent/CN204626260U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166489A (en) * | 2017-12-27 | 2018-06-15 | 中国科学院武汉岩土力学研究所 | New Anchor Cable tensioner and anchor cable two times tensioning system |
| CN108166490A (en) * | 2017-12-27 | 2018-06-15 | 中国科学院武汉岩土力学研究所 | Hung and buckled anchor cable tensioning machine tool and anchor cable two times tensioning system |
| CN110644366A (en) * | 2019-09-06 | 2020-01-03 | 中铁大桥(郑州)缆索有限公司 | Stay cable tensioning device for narrow anchoring space and operation method thereof |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |