CN201125534Y - Prestress beam pull plate-type bending machine - Google Patents
Prestress beam pull plate-type bending machine Download PDFInfo
- Publication number
- CN201125534Y CN201125534Y CNU2007200928519U CN200720092851U CN201125534Y CN 201125534 Y CN201125534 Y CN 201125534Y CN U2007200928519 U CNU2007200928519 U CN U2007200928519U CN 200720092851 U CN200720092851 U CN 200720092851U CN 201125534 Y CN201125534 Y CN 201125534Y
- Authority
- CN
- China
- Prior art keywords
- prestressing tendon
- tie
- arm
- bends
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model relates to a pull-plate type transfer apparatus of pre-stress tendons, comprising body of the transfer apparatus, a connecting pin hole disposed on lower terminal of transfer apparatus body, and at least two lines of guiding holes for pre-stress tendons symmetrically disposed corresponding to longitudinal centerline of the transfer apparatus body in parallel and above the connecting pin hole on the body. The body of the transfer apparatus comprises a pull plate with the connecting pin hole dispose on lower terminal thereof and a guiding plate vertically intersecting and connected with the pull plate. At least two lines of guiding holes for pre-stress tendons are symmetrically disposed with pull plate as center. An U-shaped connecting plate is mounted on connecting pin hole of pull plate, and bottom portion of the U-shaped connecting plate is used for being hinged to anchoring pin shaft of the anchoring device on the substrate. The transfer apparatus is a bending device for pre-stress tendons, has advantages of compact size, simple structure, convenient for processing, and low cost, which is especially suitable for construction with pretensioning prestressed concrete for bridges with small and medium span, and applicable T-type beam and box beam.
Description
Technical field
The utility model relates to the prestressed concrete engineering technical field, relates in particular to a kind of broken line and joins the prestressing tendon drawplate type that uses in the steel strand prestress concrete pre-tensioned girder and bend up device.
Background technology
The prestressed concrete engineering technology has obtained to use widely in highway engineering in China, by engineering tradition and custom, 30m is striden the following bridge in footpath generally adopt the pre-tensioning system construction technology, and 30m is striden the then post-tensioned construction technologies of using of the above bridge in footpath more.Post-tensioned construction technology, be to solidify back, stretch-draw prestressing force steel strand again in concreting, for this reason, need pre-buried pipeline in concrete in advance, after concrete reaches design strength, in pipeline, place prestress wire again, rely on presstressing tendon anchor stretch-draw prestressing force steel strand that concrete is applied prestressing force.And the pre-tensioning system construction technology, be before concreting on pedestal the stretch-draw prestressing force steel strand, then concreting is treated to put the tension prestress steel strand again after concrete reaches design strength, and concrete is applied prestressing force.Although the post-tensioned construction technology is widely used, but the quality problems that the plug-hole, the mud jacking that often occur in the post-tensioned construction are unreal etc. influences structure durability can not be avoided all the time, thereby cause many prestressed concrete continuous beam bridge generation crack developings, continue downwarp etc., cause potential safety hazard; In addition, post stretching technology than more than the pre-tensioning system technology frocks such as anchor clamp, bellows, and have more operations such as pre-buried pipeline, lashing, pipeline pneumatic mortar, make the construction technology complexity, engineering time and cost all increase to some extent.In view of the foregoing, adopt broken line to join a steel strand prestress construction technology earlier to the medium and small footpath bridge of striding in recent years both at home and abroad more,, guarantee prestressed concrete engineering quality and application life to avoid above-mentioned defective.
It is the critical component of realizing broken-line reinforcement pre-tensioned prestressed concrete construction technology that prestressing tendon bends up device, and its effect is bending and the broken line stretch-draw that realizes prestressing tendon on stretching bed seat.Chinese patent ZL02243305.8 discloses a kind of pretensioning prestressed concrete beam turner, this turner is a clamping plate roll shaft formula structure, it is embedded in concrete part is made up of the roll shaft between two clamping plates and clamping plate, and clamping plate are used for supporting roller, and steel strand are realized turnover around roll shaft; Bending up the device second portion is the anchorage part that is embedded under the pedestal base plate.This turner is bulky, complex structure and processing request are higher; This structure in use, the part that is embedded in the concrete takes up room greatly, makes the amount of concrete minimizing, beam ftractures easily, and the turner of this structure only can be applicable to T type beam, then can't use for the case beam.
The utility model content
The purpose of this utility model provides a kind of volume prestressing tendon drawplate type little, simple in structure, that can be used in T beam and case beam and bends up device.
For achieving the above object, the utility model is by the following technical solutions: the prestressing tendon drawplate type bends up device, comprise and bend up the device body, the lower end that bends up the device body has the connection pin-and-hole, bend up on the device body, the longitudinal center's line parallel symmetry that bends up the device body above the connection pin-and-hole relatively offers at least two row prestressing tendon pilot holes.
The described device body that bends up comprises arm-tie and is the guide strip that right-angled intersection is fixedlyed connected with arm-tie; Described connection pin-and-hole is located at the lower end of arm-tie, and the centerline hole that connects pin-and-hole is perpendicular to arm-tie plate face; Described at least two row prestressing tendon pilot holes are that the center is symmetricly set on the guide strip on arm-tie both sides with the arm-tie, and the centerline hole of prestressing tendon pilot hole is perpendicular to guide strip plate face.
Connect bearing pin by one on the connection pin-and-hole of arm-tie lower end one U-shaped junction plate is installed, the both ends that the U-shaped junction plate opens wide are connected with arm-tie, the bottom of U-shaped junction plate be used for base on the anchoring bearing pin of anchor device hinged.
On the arm-tie plate face of connecting pin bore portion, be installed with stiffener, connect pin-and-hole and penetrate stiffener.
In the prestressing tendon pilot hole, be provided with the antifriction cover suitable with it.
Antifriction puts an end that deviates from prestressing tendon stretch-draw direction and has the outer, the arc bellmouth orifice face of antifriction cover inwall for increasing gradually along prestressing tendon stretch-draw direction.
Bending up device body bottom is provided with near the position that bends up device body side and is used for the anti-jack of toppling over post of plug-in mounting.The prestressing tendon pilot hole of corresponding row is on the same horizontal plane in each row.Arm-tie longitudinal centre line and horizontal angle are 20-90 °.
Bend up device and be and be embedded in the prestressing tendon bending device of opening earlier in the beam concrete bodies, by bend up the device body and be located at bend up on the device body be connected pin-and-hole and the prestressing tendon pilot hole constitutes, this pilot hole is the Drawing upon that prestressing tendon bends.The utility model bends up device with respect to clamping plate roll shaft formula, have volume little, simple in structure, processing easy, low cost and other advantages, when being embedded in Liang Zhongshi, it takes up room little, can realize bending function, guarantee concrete quantity again, made beam not easy to crack, be specially adapted to medium and small needs of striding footpath bridge pre-tensioned prestressed concrete construction technology.
This bends up device can be hinged by the anchoring bearing pin that is installed in anchor device on the U type junction plate that connects on the pin-and-hole and the base, and U type junction plate places outside the concrete bodies in use, mainly bears pulling force, is tool-type device, and is reusable.This connected mode that bends up device and base anchor device make bend up the installation of device and put before the dismounting operation become simply, rapid, and can be under the pedestal bed die carry out in the wide open space of working pit, very convenient.
The antifriction cover is set in the prestressing tendon pilot hole, can reduces the friction when prestressing tendon bends in pilot hole, antifriction is overlapped an end and is had the outer, and antifriction cover outer fastening arm-tie can prevent that the antifriction cover is drawn out pilot hole when stretch-draw; In addition, according to the diameter of prestressing tendon and bend up angle, the inwall of antifriction cover is arranged to arc bellmouth orifice face, helps the bending and the stretch-draw of prestressing tendon.This bends up device vertically, laterally all can do trace swing, bends up device arm-tie and horizon angle and is made as 20-90 °, with corresponding with the inclination angle of the case web of different types, makes its uses more flexible, can be used in oblique web and web directly.
The utility model is only set up stiffener at the connection pin-and-hole position of arm-tie, has promptly guaranteed the intensity of arm-tie bearing position, can select for use an amount of thickness of material to make arm-tie under the prerequisite of pulling force satisfying again, to alleviate the gross weight that bends up device and to reduce material cost.Can insert the anti-post of toppling in the jack of arm-tie bottom, to prevent to bend up device toppling over before stretch-draw, it is stable temporarily to guarantee to bend up device, extracts when the stretch-draw steel hinge line again.
Description of drawings
Fig. 1 is the structural representation that prestressing tendon with inclination arm-tie bends up device;
Fig. 2 is the left view that removes among Fig. 1 behind the U-shaped junction plate:
Fig. 3 is the structural representation that prestressing tendon with vertical pulling plate bends up device;
Fig. 4 is the structural representation of antifriction cover;
Fig. 5 is that the utility model is built in the scheme of installation in the case beam in the prestressed concrete pre-tensioned girder construction.
The specific embodiment
Fig. 1, Fig. 2, prestressing tendon drawplate type shown in Figure 4 bend up device, comprise by arm-tie 2 be with arm-tie that guide strip 1 that right-angled intersection fixedlys connected constitutes bend up the device body, the longitudinal centre line of arm-tie 2 and horizontal included angle A are 70 °.Guide strip 1 is longer than in the lower end of arm-tie 2, this grows part and is provided with connection pin-and-hole 7, the centerline hole that connects pin-and-hole 7 is perpendicular to arm-tie plate face, connect on the pin-and-hole 7 and U-shaped junction plate 6 is installed by a connection bearing pin 5, the both ends that U-shaped junction plate 6 opens wide are connected with arm-tie 5, the bottom of U-shaped junction plate 6 be used for base on the anchoring bearing pin of anchor device hinged.In order to strengthen connecting the intensity at pin-and-hole position, on the arm-tie plate face that connects the pin-and-hole place, set firmly stiffener 4, connect pin-and-hole 7 and penetrate stiffener.In addition, be respectively equipped with near the position of two sides in the arm-tie bottom and be used for the anti-jack of toppling over post of plug-in mounting.
One row prestressing tendon pilot hole respectively is set on the guide strip on above-mentioned arm-tie both sides, the relative arm-tie of two row pilot holes longitudinal center line parallel symmetry, the centerline hole of prestressing tendon pilot hole is perpendicular to the plate face of guide strip, and the pilot hole of corresponding row is on the same horizontal plane in each row.
In the present embodiment, also be provided with the antifriction cover 3 suitable with it in the prestressing tendon pilot hole, an end that deviates from prestressing tendon stretch-draw direction on the antifriction cover 3 has outer 8, the arc bellmouth orifice face 9 of antifriction cover inwall for increasing gradually along prestressing tendon stretch-draw direction.
Above-mentioned arm-tie 2 can change according to the case beam of different types with the size of horizon included angle A, as long as satisfied identical with the inclination angle of employing case web, for example, for tee girder, described included angle A can be designed to 90 °, as shown in Figure 3.
Situation when bending up device and using in the prestressed concrete pre-tensioned girder construction shown in Figure 1 is seen shown in Figure 5, among the figure, the 11st, little case beam, the 12nd, the perforation of straight-line prestressed bundle, the 13rd, the working pit under the pedestal bed die, the 15th, base-mounted channel-section steel support is equipped with anchor device 16,14th on the channel-section steel support 15, the anchoring bearing pin.As can be seen from the figure, it is hinged with anchoring bearing pin 14 to bend up the U-shaped junction plate 6 of device.
Claims (10)
1, the prestressing tendon drawplate type bends up device, it is characterized in that: comprise bending up the device body, the lower end that bends up the device body has the connection pin-and-hole, bends up on the device body, and the longitudinal center's line parallel symmetry that bends up the device body above the connection pin-and-hole relatively offers at least two row prestressing tendon pilot holes.
2, prestressing tendon drawplate type as claimed in claim 1 bends up device, it is characterized in that: the described device body that bends up comprises arm-tie and is the guide strip that right-angled intersection is fixedlyed connected with arm-tie; Described connection pin-and-hole is located at the lower end of arm-tie, and the centerline hole that connects pin-and-hole is perpendicular to arm-tie plate face; Described at least two row prestressing tendon pilot holes are that the center is symmetricly set on the guide strip on arm-tie both sides with the arm-tie, and the centerline hole of prestressing tendon pilot hole is perpendicular to guide strip plate face.
3, prestressing tendon drawplate type as claimed in claim 2 bends up device, it is characterized in that: connect bearing pin by one on the connection pin-and-hole of arm-tie lower end one U-shaped junction plate is installed, the both ends that the U-shaped junction plate opens wide are connected with arm-tie, the bottom of U-shaped junction plate be used for base on the anchoring bearing pin of anchor device hinged.
4, prestressing tendon drawplate type as claimed in claim 3 bends up device, it is characterized in that: be installed with stiffener on the arm-tie plate face of connecting pin bore portion, connect pin-and-hole and penetrate stiffener.
5, bend up device as the described prestressing tendon drawplate type of arbitrary claim among the claim 1-4, it is characterized in that: in the prestressing tendon pilot hole, be provided with the antifriction cover suitable with it.
6, prestressing tendon drawplate type as claimed in claim 5 bends up device, it is characterized in that: antifriction puts an end that deviates from prestressing tendon stretch-draw direction and has the outer, the arc bellmouth orifice face of antifriction cover inwall for increasing gradually along prestressing tendon stretch-draw direction.
7, prestressing tendon drawplate type as claimed in claim 6 bends up device, it is characterized in that: bend up device body bottom and be provided with near the position that bends up device body side and be used for the anti-jack of toppling over post of plug-in mounting.
8, bend up device as the described prestressing tendon drawplate type of arbitrary claim among the claim 1-4, it is characterized in that: the prestressing tendon pilot hole of corresponding row is on the same horizontal plane in each row.
9, bend up device as the described prestressing tendon drawplate type of arbitrary claim among the claim 2-4, it is characterized in that: arm-tie longitudinal centre line and horizontal angle are 20-90 °.
10, prestressing tendon drawplate type as claimed in claim 9 bends up device, it is characterized in that: the position of the close arm-tie side in arm-tie bottom is provided with and is used for the anti-jack of toppling over post of plug-in mounting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200928519U CN201125534Y (en) | 2007-11-22 | 2007-11-22 | Prestress beam pull plate-type bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200928519U CN201125534Y (en) | 2007-11-22 | 2007-11-22 | Prestress beam pull plate-type bending machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201125534Y true CN201125534Y (en) | 2008-10-01 |
Family
ID=39999004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200928519U Expired - Fee Related CN201125534Y (en) | 2007-11-22 | 2007-11-22 | Prestress beam pull plate-type bending machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201125534Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251057A (en) * | 2014-08-20 | 2014-12-31 | 郑州市交通规划勘察设计研究院 | Arc bent plate type bender |
| CN104264574A (en) * | 2014-10-14 | 2015-01-07 | 重庆交通大学 | Small and medium-sized span precast concrete girder bridge pre-stressed tendon structure and arrangement method thereof |
| CN109676784A (en) * | 2019-01-23 | 2019-04-26 | 四川公路桥梁建设集团有限公司 | Fabricated steel-concrete combined structure pedestal and pre-tensioning T-beam construction method |
-
2007
- 2007-11-22 CN CNU2007200928519U patent/CN201125534Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251057A (en) * | 2014-08-20 | 2014-12-31 | 郑州市交通规划勘察设计研究院 | Arc bent plate type bender |
| CN104264574A (en) * | 2014-10-14 | 2015-01-07 | 重庆交通大学 | Small and medium-sized span precast concrete girder bridge pre-stressed tendon structure and arrangement method thereof |
| CN109676784A (en) * | 2019-01-23 | 2019-04-26 | 四川公路桥梁建设集团有限公司 | Fabricated steel-concrete combined structure pedestal and pre-tensioning T-beam construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100727172B1 (en) | Precast Concrete Panel and Nonsupport Construction Method of Bridge's Cantilever Work Utilizing P.C.P | |
| CN108729354B (en) | Downstream bridge movable formwork and construction method thereof | |
| CN112575674B (en) | Combined multistage three-dimensional anti-seismic bridge limiting device based on BRB technology | |
| CN103388408A (en) | External pre-stressed tendon reinforcing steering block for building structure | |
| CN108342982B (en) | Self-anchoring structure at bearing cable beam end of cable crane of cable stayed bridge of mixed composite beam | |
| CN201133085Y (en) | Structure for enhancing external prestressing force effect | |
| CN203559354U (en) | Stay cable anchoring structure applied to prestressed concrete partially cable-stayed bridge | |
| CN201125534Y (en) | Prestress beam pull plate-type bending machine | |
| CN206015908U (en) | A kind of reinforcing bar and the attachment structure of steel column | |
| CN111663447A (en) | Prestressed bending and anchoring device for pre-tensioning precast beam plate and construction method | |
| CN205046464U (en) | Prefabricated assembled concrete bridge mound | |
| CN214995799U (en) | Tool type wall hanging cantilever frame | |
| CN106948263B (en) | A kind of cable-stayed bridge concrete pylon anchor tie plate | |
| CN211113185U (en) | Prestressed bending and anchoring device for pre-tensioning method precast beam plate | |
| CN106012834B (en) | A kind of spatial warping curve abnormal shape antisymmetry steel king-tower inner support and tensioning system | |
| CN200985510Y (en) | Anchored exterior-protected construction | |
| CN110143529B (en) | Overlong attachment construction method for variable-section truss type tower crane | |
| CN207419848U (en) | A kind of corrugated sheet steel-concrete combined box beam | |
| CN215907027U (en) | Node that concrete structure and shaped steel roof beam are connected | |
| CN202766974U (en) | Bent cap bearing frame without full framing | |
| CN212641470U (en) | Prestressed fish-bellied beam steel strand construction guiding device | |
| CN210658887U (en) | Novel prestressed arch corrugated steel roof system for enhancing bearing capacity through inhaul cables and rigid supporting rods | |
| CN208844443U (en) | A kind of box beam ruggedized construction based on arch | |
| CN210032327U (en) | Cantilever steel beam and concrete column joint structure | |
| CN219034050U (en) | Limiting device for connection part of wood template and plastic template |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081001 Termination date: 20111122 |