CN206829644U - Supporting construction for prestressing force bellows control rise - Google Patents

Abstract

The utility model discloses the supporting construction for prestressing force bellows control rise, including cross bar, two legs being parallel to each other are fixed with below the cross bar, multiple arcs groove is provided with the upper surface of which along the cross bar axis, two legs are in V-shape, and leg opening direction is opposite with the opening direction of the deep-slotted chip breaker, extension is equipped with two ends of the leg opening, the axis of two extensions overlaps and backwards to setting.This programme is in use, according to the particular location of prestressing force bellows curve, after artificial need to be connected two legs with steel bar framework, prestressing force bellows is placed on cross bar upper surface, the preliminary restriction of bellows and steel wire are hinged to bellows and cross bar by deep-slotted chip breaker, to realize that bellows is stably fixed on cross bar, while in filling steel bar framework after fill concrete, it can avoid bellows that sidesway occurs, that is, ensure the accuracy of presstressed reinforcing steel preset position.

Description

Supporting construction for prestressing force bellows control rise

Technical field

It the utility model is related to large-span prestressed frame construction field, and in particular to control and swear for prestressing force bellows High supporting construction.

Background technology

Post stretching refers to first joints cement concrete, design strength to be achieved more than 75% after stretch-draw prestressing force steel again Material is to form the construction method of prestressed concrete member.This method is found broad application in bridge, long span building.First Pouring concrete, treat that concrete reaches design strength more than 75%, then tension reinforcing steel bar (tendon), its main stressing sequence is：Bury Control hole → pouring concrete → takes out pipe → maintenance and wears muscle tensioning → anchoring → grouting (preventing reinforcing bar from getting rusty), its force path be according to The elastic recoil of reinforcing bar is prevented by anchorage, section concrete is obtained compressive pre-stress, this way makes reinforcing bar become with concrete Entirety, referred to as bonded prestressed concrete；Bonded prestressed concrete causes pre- answer due to the effect of cohesive force (resistance) Power reinforcing bar tension reduces, and causes the reduction of coagulation soil compressive stress, so should try to reduce this bonding, this method equipment letter It is single, it is not necessary to which that stretching bed seat, production is flexible, suitable for the site operation of large-scale component；And unbonded prestressed concrete its master Want that stressing sequence lubricates anti-corrosion material → wrap plastic paper for deformed bar along total length appearance brushing pitch etc. or sleeve pipe (in advance should Power reinforcing bar and concrete do not establish cohesive force) → pouring concrete maintenance → tension reinforcing steel bar → anchoring, with normal concrete during construction Equally, reinforcing bar is put into design attitude can direct pouring concrete, it is not necessary to and reserving hole, muscle, grouting are worn, simplify operational procedure, Due to the effective compressive pre-stress increase of unbonded prestressed concrete, cost is reduced, suitable for the beam body of the big curve arrangement of reinforcement of span.

And in post tensioning construction technology, to prevent deformed bar and concrete from not producing cohesive force, it will usually in steel Pre-buried prestressing force bellows, prestressing force bellows are broadly divided into metal bellows, plastic film capicitor in muscle framework, wherein whether Metal bellows or plastic film capicitor, and in the prior art when controlling prestressing force bellows curve rise, according to inflection point And span centre minimum point can obtain parabolic equation formula, prestressed girder is divided into some sections, beam can be obtained further according to equation The curve rise of middle any section point, displacement is produced to bellows curve during in order to prevent casting concrete, in bellows every one " well " font support frame that bar dowel is welded using being welded on nonprestressed reinforcement by segment distance in advance, to ensure bellows Curve it is correct.But this kind of fixed form has the defects of certain, and the gap in the middle part of " well " font support frame is for ripple When pipe passes through, it is necessary to assure the external diameter of the gap and bellows is consistent, i.e., the gap is not subjected to displacement in guarantee bellows On the premise of, extruding can't be caused to bellows in order to avoid causing to hinder to passing through for presstressed reinforcing steel, but " well " font supports Frame is general at the scene by being manually fixed on steel bar framework, for gap length people's industry control in the middle part of " well " font support frame Precision processed is inadequate, easily causes bellows sidesway or deformation；And " well " font supports on the regional area of steel bar framework The fixation of frame is more difficult, and then increases the labor intensity of worker.

Utility model content

The utility model purpose is to provide the supporting construction for prestressing force bellows control rise, to realize in advance should The stable support of power bellows, prevent that it is subjected to displacement or deformation.

The utility model is achieved through the following technical solutions：

For the supporting construction of prestressing force bellows control rise, including cross bar, two are fixed with below the cross bar The leg being parallel to each other, multiple arcs groove is provided with the upper surface of which along the cross bar axis, two legs are in V-shape, And leg opening direction is opposite with the opening direction of the deep-slotted chip breaker, extension is equipped with two ends of the leg opening Section, the axis of two extensions overlap and backwards to settings.Easily occur offseting for prestressing force bellows in the prior art or The problem of deformation, applicant design a kind of supporting construction high dedicated for control bellows mistake, in use, according to The particular location of prestressing force bellows curve, after artificial need to be connected two legs with steel bar framework, by prestressing force bellows Cross bar upper surface is placed on, the preliminary restriction of bellows and steel wire are hinged to bellows and cross bar by deep-slotted chip breaker, with Realize that bellows is stably fixed on cross bar, while bellows can be avoided to send out after fill concrete in filling steel bar framework Raw sidesway, that is, ensure the accuracy of presstressed reinforcing steel preset position.Further, leg is in V-shape, and at the opening both ends of leg It is respectively equipped with extension so that leg can realize that fixed point position is increased between steel bar framework in itself, can manually select nearby Select the spacer bar near bellows with leg to be connected, compared with traditional " well " font support frame, in the technical program Supporting construction copes with all kinds of steel bar framework structure types, and ensures that supporting construction realizes Fast Installation on steel bar framework, The frequency of debugging is reduced, to reduce the labor intensity of worker；Also, multiple arcs groove is provided with cross bar so that supporting construction In the vector curve applied to different bellowss, the stable fixation of bellows is can guarantee that, prevents the ripple in Concrete Filled Line pipe shifts.

Smooth cross section is provided with its lower surface along the axis direction of the cross bar, and is provided with the cross section more The individual and stopper slot of cross bar axis perpendicular.When bellows is fixed, generally use steel wire enters to bellows and reinforcing bar Row colligation, and due to the characteristic of bellows itself, possess certain pliability so that in steel wire lashing without image of Buddha reinforcing bar and steel Articulated manner between muscle is the same, i.e., the connection between traditional bellows and spacer bar is partially loose, so that in steel bar framework During fill concrete, bellows is easily impacted by concrete and is used in fixed steel wire and is loosened on spacer bar, most Bellows is caused to produce laterally offset eventually, on the other hand, axis direction of the applicant along cross bar is provided with smooth horizontal stroke on the lower surface thereof Section, and multiple stopper slots are provided with cross section, while steel wire bypasses bellows and is fixed on cross bar, steel wire Around stopper slot, on the premise of ensureing that bellows does not deform upon so that steel wire is limited on cross bar together with bellows Some point position on, to ensure the stability of vector curve where prestressing force bellows.

The section of the stopper slot is triangular in shape.Preferably, the section of stopper slot is set as triangle so that steel wire When around the stopper slot, steel wire can not produce the drift rate of any direction in stopper slot, i.e., be limited in bellows same On individual point position.

The axis perpendicular of the perpendicular bisector of two legs and the cross bar.Preferably, filled in steel bar framework During concrete, concrete can form impact or extrude to cross bar, leg and bellows, and the perpendicular bisector of two legs and horizontal stroke The axis of bar is vertical so that supporting construction is further enhanced installing stability when connecting, and ensure the both sides of cross bar by Power is more balanced, to ensure stability support of the cross bar to bellows.

Spacing between the tie point of two legs and cross bar is 2/3rds of the cross bar length.Further Ground, two legs are fixed by welding in the lower surface of cross bar, and the spacing between two legs is three points of cross bar total length Two, tie point between increase supporting construction and spacer bar is to ensure that it is stable fixed that the bellows of different pore size is realized Under in advance, amount of reinforcement required during manufacture supporting construction is reduced, reduces the cost of prestressed structure framework.

The utility model compared with prior art, has the following advantages and advantages：

1st, the utility model is used for the supporting construction of prestressing force bellows control rise, according to prestressing force bellows curve Particular location, after artificial need to be connected two legs with steel bar framework, prestressing force bellows is placed on cross bar upper surface, led to Cross deep-slotted chip breaker to be hinged bellows and cross bar the preliminary restriction of bellows and steel wire, to realize that bellows is stably fixed at On cross bar, while it can avoid bellows that sidesway occurs after fill concrete in filling steel bar framework, that is, ensure presstressed reinforcing steel The accuracy of preset position；

2nd, the utility model is used for the supporting construction of prestressing force bellows control rise, and multiple arcs are provided with cross bar Groove so that supporting construction can guarantee that the stable fixation of bellows, prevent in the vector curve applied to different bellowss Bellows shifts during Concrete Filled；

3rd, the utility model is used for the supporting construction of prestressing force bellows control rise, the fill concrete in steel bar framework When, concrete can form impact or extruding to cross bar, leg and bellows, and the axle of the perpendicular bisector of two legs and cross bar Line is vertical so that stability of the supporting construction when installing connection further enhances, and ensures the both sides stress of cross bar more Equilibrium, to ensure stability support of the cross bar to bellows.

Brief description of the drawings

Accompanying drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application Part, the restriction to the utility model embodiment is not formed.In the accompanying drawings：

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the bottom schematic view of cross bar.

Mark and corresponding parts title in accompanying drawing：

1- legs, 2- cross bars, 3- deep-slotted chip breakers, 4- extensions, 5- cross sections, 6- stopper slots.

Embodiment

For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing, The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this Utility model, it is not intended as to restriction of the present utility model.

Embodiment 1

As shown in Fig. 1~2, the present embodiment includes cross bar 2, and two branch being parallel to each other are fixed with below the cross bar 2 Pin 1, multiple arcs groove 3 is provided with the upper surface of which along the axis of cross bar 2, two legs 1 are in V-shape, and leg 1 is opened Mouthful direction is opposite with the opening direction of the deep-slotted chip breaker 3, is equipped with extension 4 on two ends that the leg 1 is open, and two The axis of individual extension 4 overlaps and backwards to setting.In use, according to the particular location of prestressing force bellows curve, people After two legs 1 need to be only connected by work with steel bar framework, prestressing force bellows is placed on the upper surface of cross bar 2, passes through deep-slotted chip breaker 3 Preliminary restriction and steel wire to bellows are be hinged to bellows and cross bar 2, to realize that bellows is stably fixed at cross bar 2 On, while can avoid bellows that sidesway occurs after fill concrete in filling steel bar framework, that is, ensure that presstressed reinforcing steel is preset The accuracy of point position.Further, leg 1 is in V-shape, and is respectively equipped with extension 4 at the opening both ends of leg 1 so that branch Pin 1 itself can realize that fixed point position is increased between steel bar framework, can manually select the supporting steel near bellows nearby Muscle is connected with leg 1, and compared with traditional " well " font support frame, the supporting construction in the technical program copes with all kinds of Steel bar framework structure type, and ensure that supporting construction realizes Fast Installation on steel bar framework, the frequency of debugging is reduced, to reduce The labor intensity of worker；Also, multiple arcs groove 3 is provided with cross bar 2 so that supporting construction is applied to different bellowss During vector curve, the stable fixation of bellows is can guarantee that, prevents that bellows shifts in Concrete Filled.

In the present embodiment, smooth cross section 5 is provided with its lower surface along the axis direction of the cross bar 2, and in institute State and the multiple and axis perpendicular of cross bar 2 stopper slot 6 is provided with cross section 5.When bellows is fixed, generally use steel Silk carries out colligation to bellows and reinforcing bar, and due to the characteristic of bellows itself, possess certain pliability so that tie up in steel wire During bundle without image of Buddha reinforcing bar as articulated manner between reinforcing bar, i.e., the connection between traditional bellows and spacer bar is inclined Pine, so that in steel bar framework fill concrete, bellows is easily impacted by concrete and is used in fixed steel wire and is propping up Loosened on support reinforcing bar, ultimately result in bellows and produce laterally offset, on the other hand, axis direction of the applicant along cross bar 2 is at it Lower surface is provided with smooth cross section 5, and multiple stopper slots 6 are provided with cross section 5, steel wire around bellows and by its While being fixed on cross bar 2, steel wire bypasses stopper slot 6, on the premise of ensureing that bellows do not deform upon so that steel wire with Bellows is limited on some point position on cross bar 2 together, to ensure the stabilization of prestressing force bellows place vector curve Property.

Preferably, the section of stopper slot 6 is set as triangle so that when around the stopper slot 6, steel wire exists steel wire The drift rate of any direction can not be produced in stopper slot 6, i.e., bellows is limited on same point position.

Preferably, in steel bar framework during fill concrete, concrete can be formed to cross bar 2, leg 1 and bellows Impact or extruding, and the perpendicular bisector of two legs 1 is vertical with the axis of cross bar 2 so that supporting construction is being installed when connecting Stability further enhances, and ensures that the both sides stress of cross bar 2 is more balanced, to ensure stability of the cross bar 2 to bellows Support.

Preferably, two legs 1 are fixed by welding in the lower surface of cross bar 2, and the spacing between two legs 1 is 2/3rds of the total length of cross bar 2, the tie point between increase supporting construction and spacer bar is to ensure the ripple of different pore size Line pipe realize it is stable fixed in advance under, reduce amount of reinforcement required during manufacture supporting construction, reduce prestressed structure framework Cost.

Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit Determine the scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equally replace Change, improve, should be included within the scope of protection of the utility model.

Claims (5)

1. for the supporting construction of prestressing force bellows control rise, including cross bar (2), it is characterised in that：In the cross bar (2) Lower section is fixed with two legs being parallel to each other (1), and multiple arcs groove is provided with the upper surface of which along the cross bar (2) axis (3), two legs (1) are in V-shape, and leg (1) opening direction is opposite with the opening direction of the deep-slotted chip breaker (3), Extension (4) is equipped with two ends of leg (1) opening, the axis of two extensions (4) overlaps and backwards to setting.

2. the supporting construction according to claim 1 for prestressing force bellows control rise, it is characterised in that：Described in The axis direction of cross bar (2) is provided with smooth cross section (5) in its lower surface, and be provided with the cross section (5) it is multiple with The stopper slot (6) of cross bar (2) axis perpendicular.

3. the supporting construction according to claim 2 for prestressing force bellows control rise, it is characterised in that：The limit The section of position groove (6) is triangular in shape.

4. the supporting construction according to claim 1 for prestressing force bellows control rise, it is characterised in that：Two institutes State the perpendicular bisector of leg (1) and the axis perpendicular of the cross bar (2).

5. the supporting construction according to claim 1 for prestressing force bellows control rise, it is characterised in that：Two institutes It is 2/3rds of the cross bar (2) length to state the spacing between the tie point of leg (1) and cross bar (2).