CN103266571A - Gap bridge type steel strand limiting device - Google Patents
Gap bridge type steel strand limiting device Download PDFInfo
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- CN103266571A CN103266571A CN2013102096150A CN201310209615A CN103266571A CN 103266571 A CN103266571 A CN 103266571A CN 2013102096150 A CN2013102096150 A CN 2013102096150A CN 201310209615 A CN201310209615 A CN 201310209615A CN 103266571 A CN103266571 A CN 103266571A
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- steel strand
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- type steel
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Abstract
The invention discloses a gap bridge type steel strand limiting device and belongs to the field of constructional engineering. The gap bridge type steel strand limiting device comprises a beam, a first connecting plate, a second connecting plate and a base, wherein the beam is made of a rectangular steel plate, grooves are formed in the lower end of the beam, each groove is of an inverted U shape, the first connecting plate and the second connecting plate are perpendicularly fixed at the side wall positions of two ends of the beam respectively, the base is made of a rectangular steel plate, through holes are formed in two ends of the base respectively, and the first connecting plate and the second connecting plate are provided with circular holes which correspond to the through holes of the base. According to the gap bridge type steel strand limiting device, an up-and-down combined structure is adopted, the inverted U-shaped grooves is used for guiding placement of the beam, and the gap bridge type steel strand limiting device is convenient to operate and can effectively prevent a steel strand from flying up and hurting people after the steel strand is broken.
Description
Technical field
The invention belongs to building engineering field, more particularly, relate to a kind of bridge-type steel strand stopping means of crossing.
Background technology
Prestressed concrete is through the development of over half a century and progressively ripe along with prestressing technique, and having broken through concrete can not tension and the constraint of cracking, has expanded its range of application greatly.At present, prestressed concrete has become the topmost a kind of structural meterials of domestic and abroad bridge engineering, for the bigger bridge of span, employed prestressing steel mostly is steel strand, but disadvantages such as weight is big, easy-to-rust that these class steel still have, the stretching process that adds steel strand is to carry out the external of stretch-draw crossbeam, need acceptance from the pulling force of the big ton amount of hydraulic tests such as jack, very easily stress is concentrated etc. former thereby accident such as burst apart, fracture, and the steel wire of bounce-back can produce great life danger to construction workman on every side.The steel wire of some bounce-back rebound the people on the face or on one's body, the lighter can cause skin trauma, weight person then may threat to life.How but existing equipment the time has only considered that in design each can better stretching steel strand, seldom considers the problem of steel strand fracture back bounce-back.For example: China Patent No. is 201220019698.8, open day is on October 3rd, 2012, disclose the patent document that a name is called two dimension prestressing antifatigue girder steel, this invention is made of girder steel, prestress wire, arc cushion block, plain cushion piece, prestressed high-strength bolt, nut, crimping anchor head, bearing stiffener and bearing.Be that two steel strand with symmetric arrangement apply the girder steel longitudinal prestressing at the web place of the nearly bottom flange of girder steel, and in the beam length range, be symmetrical in the web both sides, with high-strength bolt girder steel is applied transverse prestress with suitable spacing.Under this two dimension prestressing effect, the girder steel bottom flange does not enter under Fatigue Load and is subjected to tensile stress state, web sloping section main stress bar under the shearing action that wheel load produces does not enter tension state yet, thereby guarantees that the girder steel edge of a wing and web all can not produce fatigue failure.Thereby make the girder steel of being controlled by fatigue capacity can effectively utilize high-strength steel, economize on resources, improve safety, stop fatigue failure.
China Patent No. is 201110145481.1, and open day is on December 28th, 2011, discloses the patent document that a name is called prestressing force antifatigue girder steel, and this invention belongs to technical field of civil engineering, is specifically related to a kind of prestressing force antifatigue girder steel.By the top flange, the bottom flange, web, the bearing stiffener prestressing force anchor slab of holding concurrently, anchor hole, the high-strength prestress steel strand, the anchoring stiffener, anchor head, arc, bearing steel corbel and anti-sidesway cushion block are formed, be near the anchor hole of the tension edge of a wing about the web symmetry, to penetrate prestress wire, use the anchor head anchoring after the stretch-draw, thereby the tensile region to girder steel produces precompression, make it consider that the lax back of prestressing force compressive stress adds tired tensile stress amplitude greater than tensile stress under the deadweight, then the bottom flange of beam can not enter tension yet under deadweight and fatigue loading compound action, thereby has solved fatigue problem.This invention makes bottom flange design Fatigue Stress Amplitude be confined to allow Fatigue Stress Amplitude to bring up near design strength f from former, 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 has significantly improved the stock utilization of high strength steel.
Above-mentioned girder steel is used very extensive in the manufacture process of the big bridge of span; it is in work progress; do not prevent the protective device that flies up because fractureing of steel strand; steel strand are in the external tension of girder steel; and need the workman to operate to adjust the connecting portion of steel strand; or do not solve if steel strand break accident, workman's life is produced the problem of threat.And if safeguard measure, the life security that greatly threatens the workman are not set.
Summary of the invention
1, the problem that will solve
At the above-mentioned problems in the prior art, the invention provides a kind of bridge-type steel strand stopping means of crossing, it adopts combining structure up and down, and utilizes inverted U-shaped groove that the placement of crossbeam is led, easy to operate, can prevent from effectively that post-rift steel strand from flying up to hurt sb.'s feelings.
2, technical scheme
In order to address the above problem, the technical solution adopted in the present invention is as follows.
A kind of bridge-type steel strand stopping means of crossing comprises crossbeam, first junction plate, second junction plate and base, and described crossbeam is made by rectangular steel plates; Described crossbeam lower end has N 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 the described adjacent notches is 0.1-0.4cm; Described first junction plate, second junction plate difference vertical fixing are in the side-walls at the two ends of crossbeam; The lower surface of described first junction plate, 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; Have the circular hole corresponding with the through hole on the base on described first junction plate, second junction plate.
Further, the length of described crossbeam is 103-127cm.
Further, described N equals 20.
Further, the pitch of holes of two through holes is identical on the pitch of holes of the circular hole on described first junction plate, second junction plate and the base.
3, beneficial effect
Adopt technical scheme provided by the invention, compare with existing technology, have following beneficial effect:
(1) the present invention crosses bridge-type steel strand stopping means, comprises crossbeam, first junction plate, second junction plate, base, and described crossbeam is made by rectangular steel plates; Described crossbeam lower end has groove; Described groove is inverted U-shaped, and the steel crossbeam can effectively limit the steel strand that break and fly up and hurt sb.'s feelings, and is easy and simple to handle, and it is little to take up an area of the space;
(2) to cross the pitch of holes of two through holes on pitch of holes and the base of first junction plate, the circular hole on second junction plate of bridge-type steel strand stopping means identical in the present invention, makes crossbeam more convenient with being connected of base.
Description of drawings
Fig. 1 is structural representation of the present invention.
Among the figure: 1, crossbeam; 2, first junction plate; 3, base; 4, second junction plate; 5, groove.
The specific embodiment
For the ease of it will be appreciated by those skilled in the art that below in conjunction with accompanying drawing invention is further described.
Embodiment 1
As shown in Figure 1, a kind of bridge-type steel strand stopping means of crossing comprises crossbeam 1, first junction plate 2, second junction plate 4 and base 3, and crossbeam 1 is made by rectangular steel plates; Crossbeam 1 lower end has 20 grooves 5; Groove 5 is inverted U-shaped, and its width is 4.4cm; The vertical wall height of groove 5 is 13cm; Separation between the adjacent notches 5 is 0.2cm; First junction plate 2, second junction plate, 4 difference vertical fixing are in the side-walls at the two ends of crossbeam 1; The lower surface of 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; Have the circular hole corresponding with the through hole on the base 3 on first junction plate 2, second junction plate 4.
The length of crossbeam 1 is 118cm; The pitch of holes of two through holes is identical on the pitch of holes of the circular hole on first junction plate 2, second junction plate 4 and the base 3.
Before steel strand are carried out stretch-draw, junction at steel strand and finish rolling screw thread, with base 3 laterally vertically put into steel wire bundle below, again steel strand are passed the inverted U-shaped groove 5 of crossbeam 1, hole on win junction plate 2 and second junction plate 4 is cooperated with hole on the base 3 respectively, connect with screw, this moment, crossbeam 1 constituted an integral body with base 3 again.
With embodiment 1, difference is, crossbeam 1 lower end has 15 grooves 5, and recess width is 4cm, and the separation between the adjacent notches 5 is 0.4cm, and crossbeam length is 103cm.
With embodiment 1, difference is, crossbeam 1 lower end has 25 grooves 5, and recess width is 4.8cm, and the separation between the adjacent notches 5 is 0.1cm, and crossbeam length is 127cm.
Above content only is to structure example of the present invention and explanation; under those skilled in the art described specific embodiment is made various modifications or replenish or adopt similar mode to substitute; only otherwise depart from the design of invention or surmount the defined scope of these claims, all should belong to protection scope of the present invention.
Claims (4)
1. cross bridge-type steel strand stopping means for one kind, it is characterized in that: comprise crossbeam (1), first junction plate (2), second junction plate (4) and base (3), described crossbeam (1) is made by rectangular steel plates; Described crossbeam (1) lower end has N groove (5); Described N equals 15-25; Described groove (5) is inverted U-shaped, and its width is 4-4.8cm; The vertical wall height of described groove (5) is 13cm; Separation between the described adjacent notches (5) is 0.1-0.4cm; Described first junction plate (2), second junction plate (4) difference vertical fixing are in the side-walls at the two ends of crossbeam (1); The lower surface of described first junction plate (2), 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; Have the circular hole corresponding with the through hole on the base (3) on described first junction plate (2), second junction plate (4).
2. according to the described bridge-type steel strand stopping means of crossing of claim 1, it is characterized in that: the length of described crossbeam (1) is 103-127cm.
3. according to the described bridge-type steel strand stopping means of crossing of claim 1, it is characterized in that: described N equals 20.
4. according to the described bridge-type steel strand stopping means of crossing of claim 1, it is characterized in that: the pitch of holes of the circular hole on described first junction plate (2), second junction plate (4) is identical with the pitch of holes of last two through holes of base (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209615.0A CN103266571B (en) | 2013-05-31 | 2013-05-31 | A kind of gap bridge type steel strand stopping means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209615.0A CN103266571B (en) | 2013-05-31 | 2013-05-31 | A kind of gap bridge type steel strand stopping means |
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| Publication Number | Publication Date |
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| CN103266571A true CN103266571A (en) | 2013-08-28 |
| CN103266571B CN103266571B (en) | 2015-10-28 |
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| CN201310209615.0A Expired - Fee Related CN103266571B (en) | 2013-05-31 | 2013-05-31 | A kind of gap bridge type steel strand stopping means |
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| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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