CN103266571B - A kind of gap bridge type steel strand stopping means - Google Patents
A kind of gap bridge type steel strand stopping means Download PDFInfo
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- CN103266571B CN103266571B CN201310209615.0A CN201310209615A CN103266571B CN 103266571 B CN103266571 B CN 103266571B CN 201310209615 A CN201310209615 A CN 201310209615A CN 103266571 B CN103266571 B CN 103266571B
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Abstract
The invention discloses a kind of gap bridge type steel strand stopping means, belong to building engineering field.It comprises crossbeam, the first junction plate, the second junction plate and base, and described crossbeam is made by rectangular steel plates; It is inverted U-shaped that described crossbeam lower end has groove described in groove; Described first junction plate, the second junction plate are vertically fixed on the side-walls at the two ends of crossbeam respectively; Described base is made by rectangular steel plates, and its two ends all have through hole; Described first junction plate, the second junction plate have the circular hole corresponding with the through hole on base.Gap bridge type steel strand stopping means of the present invention, adopts upper and lower combining structure, and utilizes the placement of inverted U-shaped groove to crossbeam to lead, easy to operate, effectively can prevent post-rift steel strand from flying up and hurt sb.'s feelings.
Description
Technical field
The invention belongs to building engineering field, more particularly, relate to a kind of gap bridge type steel strand stopping means.
Background technology
Prestressed concrete is through the development of over half a century and progressively ripe along with prestressing technique, and having breached concrete can not the constraint of tension and cracking, greatly extends its range of application.At present, prestressed concrete has become the topmost a kind of structural meterials of domestic and abroad bridge engineering, for the bridge that span is larger, the prestressing steel used mostly is steel strand, but the disadvantages such as weight is large, easy-to-rust that this kind of steel still have, add that the stretching process of steel strand carries out the external of stretch-draw crossbeam, the pulling force of the large ton amount from hydraulic tests such as jack need be accepted, very easily stress the reason such as to concentrate and burst apart, the accident such as fracture, and the steel wire of bounce-back can produce great life danger to the construction worker of surrounding.Steel wire of some bounce-back rebound people on the face or with it, the lighter can cause skin trauma, and severe one then may threat to life.How respectively can better stretching steel strand, the seldom rear problem rebounded of consideration steel strand fracture but existing equipment only take into account when design.Such as: China Patent No. is 201220019698.8, publication date is on October 3rd, 2012, disclose the patent document that a name is called two dimension prestressing anti-fatigue girder, this invention is made up of girder steel, prestress wire, arc cushion block, Flat gasket, prestressed high-strength bolt, nut, crimping anchor head, bearing stiffener and bearing.Be apply girder steel longitudinal prestressing at the web place of the nearly bottom flange of girder steel with two steel strand be arranged symmetrically with, and in beam length range, be symmetrical in web both sides, with suitable spacing high-strength bolt, transverse prestress is applied to girder steel.Under this two dimension prestressing effect, girder steel bottom flange does not enter tension stress state under Fatigue Load, under the shearing action that web produces in wheel load, sloping section main stress bar does not also enter tension state, thus guarantees that steel beam flange and web all can not produce fatigue failure.Thus make the girder steel controlled by fatigue capacity to effectively utilize high-strength steel, economize on resources, improve safety, stop fatigue failure.
China Patent No. is 201110145481.1, and publication date is on December 28th, 2011, and disclose the patent document that a name is called prestressing force anti-fatigue girder, this invention belongs to technical field of civil engineering, is specifically related to a kind of prestressing force anti-fatigue girder.By top flange, bottom flange, web, bearing stiffener is held concurrently prestressing force anchor slab, anchor hole, high-strength prestress steel strand, anchoring stiffening plate, anchor head, arc, bearing steel corbel and anti-sidesway cushion block composition, penetrating prestress wire in the anchor hole of tension flange about web symmetry, anchor head anchoring is used after stretch-draw, thus precompression is produced to the tensile region of girder steel, after making it consider Relaxation of prestressing, compressive stress is greater than the lower tensile stress of deadweight and adds tired tensile stress amplitude, then the bottom flange of beam also can not enter tension under deadweight and fatigue loading compound action, thus solve fatigue problem.This invention makes design Fatigue Stress Amplitude in bottom flange allow Fatigue Stress Amplitude to bring up to close to design strength f from former being confined to, anti-fatigue ability significantly improves, the brittle fracture of the labor that weakens is the strength problem of ductility, the ultimate strength of bottom flange almost doubles, and significantly improves the stock utilization of high strength steel.
Above-mentioned girder steel is applied very extensive in the manufacture process of the larger bridge of span; it is in work progress; do not prevent the protective device flown up because fractureing of steel strand; steel strand are in the external tension of girder steel; and need operative to adjust the connecting portion of steel strand; if still do not solve steel strand to break accident, the problem threatened is produced to the life of workman.And if do not arrange safeguard measure, the life security of great threat workman.
Summary of the invention
the problem that 1, will solve
For the above-mentioned problems in the prior art, the invention provides a kind of gap bridge type steel strand stopping means, it adopts upper and lower combining structure, and utilizes the placement of inverted U-shaped groove to crossbeam to lead, easy to operate, effectively can prevent post-rift steel strand from flying up and hurt sb.'s feelings.
2, technical scheme
In order to solve the problem, the technical solution adopted in the present invention is as follows.
A kind of gap bridge type steel strand stopping means, comprise crossbeam, the first junction plate, the second junction plate and base, described crossbeam is made by rectangular steel plates; Described crossbeam lower end has N number of groove; Described N equals 15-25; Described groove is inverted U-shaped, and its width is 4-4.8cm; The vertical wall height of described groove is 13cm; Separation between described adjacent grooves is 0.1-0.4cm; Described first junction plate, the second junction plate are vertically fixed on the side-walls at the two ends of crossbeam respectively; The lower surface of described first junction plate, the second junction plate is parallel with the lower surface of crossbeam; Described base is made by rectangular steel plates, and its two ends all have through hole; Described first junction plate, the second junction plate have the circular hole corresponding with the through hole on base.
Further, the length of described crossbeam is 103-127cm.
Further, described N equals 20.
Further, the pitch of holes of the circular hole on described first junction plate, the second junction plate is identical with the pitch of holes of two through holes on base.
3, beneficial effect
Adopt technical scheme provided by the invention, compared with existing technology, there is following beneficial effect:
(1) gap bridge type steel strand stopping means of the present invention, comprise crossbeam, the first junction plate, the second junction plate, base, described crossbeam is made by rectangular steel plates; Described crossbeam lower end has groove; Described groove is inverted U-shaped, and steel crossbeam effectively can limit the steel strand broken and fly up and hurt sb.'s feelings, easy and simple to handle, and it is little to take up an area space;
(2) pitch of holes of the circular hole on the first junction plate of gap bridge type steel strand stopping means of the present invention, the second junction plate is identical with the pitch of holes of two through holes on base, makes the connection of crossbeam and base more convenient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, crossbeam; 2, the first junction plate; 3, base; 4, the second junction plate; 5, groove.
Detailed description of the invention
Invention to be further described below in conjunction with accompanying drawing for the ease of it will be appreciated by those skilled in the art that.
embodiment 1
As shown in Figure 1, a kind of gap bridge type steel strand stopping means, comprise crossbeam 1, first junction plate 2, second junction plate 4 and base 3, crossbeam 1 is made by rectangular steel plates; Crossbeam 1 lower end has 20 grooves 5; Groove 5 is in inverted U-shaped, and its width is 4.4cm; The vertical wall height of groove 5 is 13cm; Separation between adjacent grooves 5 is 0.2cm; First junction plate 2, second junction plate 4 is vertically fixed on the side-walls at the two ends of crossbeam 1 respectively; The lower surface of the first junction plate 2, second junction plate 4 is parallel with the lower surface of crossbeam 1; Base 3 is made by rectangular steel plates, and its two ends all have through hole; First junction plate 2, second junction plate 4 has the circular hole corresponding with the through hole on base 3.
The length of crossbeam 1 is 118cm; The pitch of holes of the circular hole on the first junction plate 2, second junction plate 4 is identical with the pitch of holes of two through holes on base 3.
Before stretch-draw is carried out to steel strand, in the junction of steel strand and finish rolling screw thread, base 3 is laterally vertically put into below steel wire bundle, again by the inverted U-shaped groove 5 of steel strand through crossbeam 1, hole on first junction plate 2 and the second junction plate 4 is coordinated with the hole on base 3 respectively, connect with screw, now crossbeam 1 and base 3 form an entirety again.
embodiment 2
With embodiment 1, difference is, crossbeam 1 lower end has 15 grooves 5, and recess width is 4cm, and the separation between adjacent grooves 5 is 0.4cm, and crossbeam length is 103cm.
embodiment 3
With embodiment 1, difference is, crossbeam 1 lower end has 25 grooves 5, and recess width is 4.8cm, and the separation between adjacent grooves 5 is 0.1cm, and crossbeam length is 127cm.
Above content is only to structure example of the present invention and explanation; affiliated those skilled in the art make various amendment to described specific embodiment or supplement or adopt similar mode to substitute; only otherwise depart from the design of invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (1)
1. a gap bridge type steel strand stopping means, is characterized in that: comprise crossbeam (1), the first junction plate (2), the second junction plate (4) and base (3), described crossbeam (1) is made by rectangular steel plates; Described crossbeam (1) lower end has N number of groove (5); Described N equals 15-25; Described groove (5) is in inverted U-shaped, and its width is 4-4.8cm; The vertical wall height of described groove (5) is 13cm; Separation between described adjacent grooves (5) is 0.1-0.4cm; Described first junction plate (2), the second junction plate (4) are vertically fixed on the side-walls at the two ends of crossbeam (1) respectively; The lower surface of described first junction plate (2), the second junction plate (4) is parallel with the lower surface of crossbeam (1); Described base (3) is made by rectangular steel plates, and its two ends all have through hole; Described first junction plate (2), the second junction plate (4) have the circular hole corresponding with the through hole on base (3); The length of described crossbeam (1) is 103-127cm; Described N equals 20; The pitch of holes of the circular hole on described first junction plate (2), the second junction plate (4) is identical with the pitch of holes of upper two through holes of base (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310209615.0A CN103266571B (en) | 2013-05-31 | 2013-05-31 | A kind of gap bridge type steel strand stopping means |
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| CN201310209615.0A CN103266571B (en) | 2013-05-31 | 2013-05-31 | A kind of gap bridge type steel strand stopping means |
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| CN103266571A CN103266571A (en) | 2013-08-28 |
| CN103266571B true CN103266571B (en) | 2015-10-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067202A (en) * | 2019-04-15 | 2019-07-30 | 中铁广州工程局集团有限公司 | A kind of steel nose girder and trough girder connection method |
Citations (6)
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| KR100621539B1 (en) * | 2003-12-23 | 2006-09-13 | 동양종합건업 주식회사 | Method for connecting continuously P.S.C-Ibeam by steel bracket and its structure |
| DE19928445B4 (en) * | 1999-06-23 | 2007-10-04 | Suspa Spannbeton Gmbh | Forming a deflection sliding point for tendons |
| CN201033945Y (en) * | 2007-03-05 | 2008-03-12 | 柳州欧维姆机械股份有限公司 | Short strand wire stretching stopping means |
| CN101260741A (en) * | 2007-03-05 | 2008-09-10 | 柳州欧维姆机械股份有限公司 | Short bundle cable stretching caging device and method for stretching and anchoring |
| CN102943437A (en) * | 2012-12-04 | 2013-02-27 | 中铁二十一局集团有限公司 | Device for limiting and protecting anchoring end of vertical steel strand |
| CN203347246U (en) * | 2013-05-31 | 2013-12-18 | 中交二航局第四工程有限公司安徽分公司 | Gap bridged limiting device for steel strand |
-
2013
- 2013-05-31 CN CN201310209615.0A patent/CN103266571B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19928445B4 (en) * | 1999-06-23 | 2007-10-04 | Suspa Spannbeton Gmbh | Forming a deflection sliding point for tendons |
| KR100621539B1 (en) * | 2003-12-23 | 2006-09-13 | 동양종합건업 주식회사 | Method for connecting continuously P.S.C-Ibeam by steel bracket and its structure |
| CN201033945Y (en) * | 2007-03-05 | 2008-03-12 | 柳州欧维姆机械股份有限公司 | Short strand wire stretching stopping means |
| CN101260741A (en) * | 2007-03-05 | 2008-09-10 | 柳州欧维姆机械股份有限公司 | Short bundle cable stretching caging device and method for stretching and anchoring |
| CN102943437A (en) * | 2012-12-04 | 2013-02-27 | 中铁二十一局集团有限公司 | Device for limiting and protecting anchoring end of vertical steel strand |
| CN203347246U (en) * | 2013-05-31 | 2013-12-18 | 中交二航局第四工程有限公司安徽分公司 | Gap bridged limiting device for steel strand |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067202A (en) * | 2019-04-15 | 2019-07-30 | 中铁广州工程局集团有限公司 | A kind of steel nose girder and trough girder connection method |
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