CN113089493B - High pier T beam hogging moment tensioning device and tensioning method - Google Patents
High pier T beam hogging moment tensioning device and tensioning method Download PDFInfo
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- CN113089493B CN113089493B CN202110420161.6A CN202110420161A CN113089493B CN 113089493 B CN113089493 B CN 113089493B CN 202110420161 A CN202110420161 A CN 202110420161A CN 113089493 B CN113089493 B CN 113089493B
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- tensioning
- hogging moment
- bearing
- bearing platform
- supporting
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses a hogging moment tensioning device and a tensioning method for a high pier T beam, wherein the device comprises: the cantilever frame is provided with a fixed end and an overhanging end, the fixed end is arranged at the upper part of the T-shaped beam, the overhanging end extends to the outer side of the T-shaped beam, and the overhanging end is connected with a baffle; the bearing platform is provided with a bearing end and a supporting end, the middle part of the bearing platform is hung at the overhanging end through a lifting device, and the supporting end is provided with a supporting rod with adjustable height; the sliding frame can be arranged at the bearing end in a sliding manner along the width direction of the T-shaped beam; and the tensioning jack is detachably arranged on the sliding frame, and the support rod is supported at the bottom of the baffle plate to keep the bearing end and the supporting end of the bearing platform in a balanced state after the tensioning jack is aligned with the hogging moment anchor groove of the T-shaped beam. The method solves the problem of low construction efficiency of hogging moment tensioning of the T-shaped beam under the condition of high bridge pier.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a high pier T beam hogging moment tensioning device and a tensioning method.
Background
In the bridge construction structure, the structural form of the bridge is various, and the T-shaped beam is a common bridge upper form. If the bridge pier is in a high condition, the hogging moment tension of the T-shaped beam has high construction difficulty and potential safety hazards, the danger coefficient is high, and the progress is slow.
Disclosure of Invention
In order to overcome the defects in the prior art, a high pier T beam hogging moment tensioning device and a tensioning method are provided so as to solve the problem that the hogging moment tensioning of a T-shaped beam is low in construction efficiency under the condition that a pier is high.
In order to realize the above-mentioned purpose, provide a high mound T roof beam hogging moment tensioning equipment, include:
the cantilever frame is provided with a fixed end and an overhanging end, the fixed end is arranged at the upper part of the T-shaped beam, the overhanging end extends to the outer side of the T-shaped beam, and the overhanging end is connected with a baffle;
the bearing platform is provided with a bearing end and a supporting end, the middle part of the bearing platform is hung at the overhanging end through a lifting device, and the supporting end is provided with a supporting rod with adjustable height;
the sliding frame can be movably arranged at the bearing end in a sliding manner along the width direction of the T-shaped beam; and
and the tensioning jack is detachably arranged on the sliding frame, and the support rod is supported at the bottom of the baffle plate to keep the bearing end and the supporting end of the bearing platform in a balanced state after the tensioning jack is aligned with the hogging moment anchor groove of the T-shaped beam.
Further, the lifting device is a chain block.
Furthermore, the middle part of the bearing platform is provided with a bearing and hanging piece in a turnover mode, the upper end of the inverted chain is connected to the overhanging end, and the lower end of the inverted chain is connected to the bearing and hanging piece.
Further, the hanging piece comprises:
the two opposite sides of the middle part of the bearing platform are respectively provided with a fixed shaft, and the lower ends of the suspenders are rotatably arranged on the fixed shafts; and
the two ends of the connecting rod are respectively connected to the upper ends of the two hanging rods, and the middle of the connecting rod is connected to the lower end of the chain block.
Further, the sliding frame comprises:
the upper part of the base is provided with an accommodating groove, and the tensioning jack is embedded in the accommodating groove;
the roller is arranged on the base, and the bearing end is supported on the roller; and
the limiting rods are arranged at two opposite ends of the base and abut against two opposite sides of the bearing end.
Furthermore, the bearing end is provided with a first stop lever for preventing the sliding frame from slipping off the bearing end.
Furthermore, the holding groove is communicated with the base, and two ends of the holding groove are detachably mounted with second stop levers used for abutting against the tensioning jack.
Further, the support rod includes:
the sleeve is vertically arranged at the supporting end;
the lower end of the core rod is movably inserted into the sleeve, and the upper end of the core rod is supported at the bottom of the baffle; and
and the locking piece is used for locking and fixing the core rod and is arranged on the sleeve.
The invention provides a hogging moment tensioning method for a high pier T beam, which comprises the following steps of:
mounting a fixed end of a cantilever frame on the upper part of a T-shaped beam, so that the cantilever end of the cantilever frame extends to the outer side of the T-shaped beam;
adjusting the length of the lifting device and the height of the supporting rod to ensure that the bearing end of the bearing platform extends to the position below the flange plate of the T-shaped beam and the supporting end of the bearing platform extends to the position right below the baffle;
adjusting the height of the supporting rod to enable the supporting rod to be supported at the bottom of the baffle;
installing a tensioning jack on the sliding frame;
moving the sliding frame and finely adjusting the length of the lifting device and the height of the supporting rod, so that the tensioning jack is aligned to the height of the hogging moment anchor groove of the T-shaped beam, and the bearing end and the supporting end of the bearing platform are kept in a balanced state;
and after the bearing platform is balanced, the tensioning jack tensions the steel strand of the T-shaped beam.
The high-pier T-beam hogging moment tensioning device has the beneficial effects that all parts are connected into an integral frame structure, so that the integral rigidity and stability of the device can be greatly improved, and the safety coefficient in high-altitude construction is greatly improved; meanwhile, the bearing platform and the sliding frame of the high pier T-beam hogging moment tensioning device can be manufactured in a modularized mode, so that partial installation is realized, the moving and installing difficulty is reduced, the high pier T-beam hogging moment tensioning device is suitable for hogging moment tensioning of wet joints with various widths, in the hogging moment of an ultrahigh pier stud bridge, a suspension bracket and the sliding frame are used for accurately and safely conveying a tensioning jack to the hogging moment position for steel strand tensioning operation, the safety coefficient is high, the use is convenient, and the tensioning efficiency is high.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a hogging moment tensioning device for a high-pier T-beam according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a platform according to an embodiment of the invention.
FIG. 3 is a schematic view showing the use state of the hogging moment tensioning device for the high pier T-beam according to the embodiment of the invention.
Fig. 4 is a schematic view of the upper part of the hogging moment tensioning device for the high pier T-beam according to the embodiment of the present invention.
FIG. 5 is a schematic view of the lower part of the hogging moment tensioning device for the high pier T-beam of the embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 5, the present invention provides a hogging moment tensioning device for a high pier T-beam, comprising: the device comprises a cantilever frame, a bearing platform 2, a sliding frame 3 and a tensioning jack 4.
In the present embodiment, the T-shaped girder 5 is erected on the high pier 6. Opposite sides of the top of the T-beam 5 extend to form flange plates 51, respectively. The prestressed steel strand penetrates through the flange plate.
The cantilever 1 has a fixed end and a cantilevered end. The fixed end of the cantilever 1 is mounted on the upper part of the T-beam 5. The overhanging end of the outrigger 1 extends to the outside of the flange plate of the T-beam 5. The overhanging end is connected with a baffle plate 11.
The supporting platform 2 has a bearing end and a supporting end. The middle part of the bearing platform 2 is hung at the overhanging end through a lifting device 20. The supporting end of the bearing platform 2 is provided with a supporting rod 21 with adjustable height. The supporting rod is used for supporting the bottom of the baffle plate so as to enable the bearing platform to be arranged along the horizontal direction.
The sliding frame 3 can slide on the bearing end of the bearing platform 2 along the width direction of the T-shaped beam 5.
The tensioning jack 4 is detachably mounted on the sliding frame 3.
After the tensioning jack 4 is aligned with the hogging moment anchor groove of the T-beam 5. The support rod 21 is supported at the bottom of the baffle 11 to keep the bearing end and the supporting end of the bearing platform 2 in a balanced state. After the tensioning jack is placed on the sliding frame and the sliding frame is moved until the tensioning jack is aligned to the hogging moment anchor groove of the flange plate of the T-shaped beam, the support rod is supported at the bottom of the baffle plate, so that the bearing platform is arranged along the horizontal direction.
Under some working conditions, the plurality of T-shaped beams are arranged in the same direction, a hogging moment tensioning seam (namely a wet seam and later-stage concrete pouring are performed to connect the two adjacent T-shaped beams into a whole) is formed between the flange plates of the adjacent T-shaped beams, and when steel strands in the hogging moment anchor grooves of the flange plates of the hogging moment tensioning seam are tensioned, as shown in fig. 3 to 5, the cantilever end and the baffle plate of the cantilever frame are placed on the flange plates of the adjacent T-shaped beams, the support rod is supported at the bottoms of the flange plates of the adjacent T-shaped beams, and the bearing platform is tensioned in the horizontal direction after the jack is placed.
When steel strands in the hogging moment anchor grooves of the flange plates on the outermost sides of the T-shaped beams are tensioned, the overhanging ends of the overhanging frames extend to the outer sides of the flange plates to be arranged in an overhanging mode, and the supporting rods are supported on the baffle plates of the overhanging frames, so that the bearing platform is arranged in the horizontal direction after the tensioning jack is placed.
According to the high pier T-beam hogging moment tensioning device, all parts are connected into an integral frame structure, so that the integral rigidity and stability of the device can be greatly improved, and the safety coefficient in high-altitude construction is greatly improved; meanwhile, the bearing platform and the sliding frame of the high pier T-beam hogging moment tensioning device can be manufactured in a modularized mode, and partial installation is achieved, so that the moving and installing difficulty is reduced, the device is suitable for hogging moment tensioning of wet joints of various widths, in the hogging moment of an ultrahigh pier stud bridge, a suspension frame and the sliding frame are used for accurately and safely feeding a tensioning jack into a hogging moment position to perform steel strand tensioning operation, the safety coefficient is high, the use is convenient, and the tensioning efficiency is high.
In this embodiment, the cantilever mount includes a tripod body and at least two support beams. The supporting beams are arranged in the same direction, one end of each supporting beam is fixed on the bridge deck of the T-shaped beam, the other end of each supporting beam is cantilevered to extend to the outer side of the flange plate of the T-shaped beam, and the baffle is installed at the other end of each supporting beam. The tripod body is installed on many supporting beams.
In a preferred embodiment, the lifting device 20 is a chain block, and the chain block is hung on the tripod body and inserted between two adjacent supporting beams. The setting height of the bearing platform can be manually adjusted by lifting the chain block.
In this embodiment, the cap includes two cross members and a connecting beam connected between the two cross members. In some embodiments, an inner support beam is also connected between the two cross beams. The middle part of the bearing platform 2 is provided with a suspension member 33 in a reversible way. The upper end of the inverted chain is connected to the overhanging end, and the lower end of the inverted chain is connected to the hanging piece 33.
Specifically, the suspension member 33 includes: two hanger bars 331 and a connecting bar 332.
The middle parts of the two beams of the bearing platform 2 are respectively provided with a fixed shaft. The lower end of the boom 331 is rotatably mounted to the fixed shaft. The lower extreme of jib has seted up the shaft hole, and the fixed axle is located to the shaft hole rotationally the cover. Both ends of the connecting rod 332 are connected to the upper ends of the two suspension rods 331, respectively. The middle of the connecting rod 332 is connected to the lower end of the chain block.
In this embodiment, the connecting rod is the shape of falling V, and the chain block is connected in the arc top position of connecting rod.
As a preferred embodiment, the sliding frame 3 includes: a base, rollers 32 and a stop bar 34.
The upper part of the base forms an accommodating groove. The tensioning jack 4 is embedded in the accommodating groove. The rollers 32 are mounted on the base. The load bearing end is supported on rollers 32. In this embodiment, the rollers are rotatably mounted on two opposite sides of the base respectively, and the rollers on two sides of the base walk on the two beams and walk on the beams along the length direction of the beams.
Stop rods 34 are mounted at opposite ends of the base. The stop bar 34 abuts against opposite sides of the load-bearing end to prevent the skid from slipping off the beam.
Further, a first stop lever 22 for preventing the sliding frame 3 from slipping off the bearing end is installed at the bearing end of the bearing platform. The first stop lever is mounted at the end of the cross beam.
In this embodiment, the receiving groove on the base penetrates through the base. Both ends of the receiving groove are detachably mounted with second stopper rods 311 for abutting against the tensioning jack 4. Specifically, the opposite sides of the end portion of the accommodating groove are respectively connected with a sleeve, the second stop rod penetrates through the two sleeves at the end portion of the accommodating groove, and the tensioning jack abuts against the second stop rod after being accommodated in the accommodating groove.
In the present embodiment, the support rod 21 includes: a sleeve and a core rod. The sleeve is vertically arranged at the supporting end of the bearing platform. The sleeve is vertically arranged at one end of the cross beam of the bearing platform, which is far away from the first stop lever. The lower end of the core rod is movably inserted in the sleeve. The upper end of the core rod is supported at the bottom of the baffle 11. A locking member is mounted to the sleeve. The locking piece is used for locking the core rod.
Furthermore, two cross beams of the bearing platform are respectively provided with a support rod, and a reinforcing rod is connected between the sleeves of the two support rods.
The invention provides a high pier T-beam hogging moment tensioning method, which comprises the following steps:
s1: mounting the fixed end of the cantilever 1 on the upper part of the T-shaped beam 5, so that the cantilever end of the cantilever 1 extends to the outer side of the T-shaped beam 5;
s2: the length of the lifting device 20 is adjusted, and the height of the support rod 21 is adjusted, so that the bearing end of the bearing platform 2 extends to the lower part of the flange plate 51 of the T-shaped beam 5, and the supporting end of the bearing platform 2 extends to the right lower part of the baffle 11;
s3: adjusting the height of the support rod 21 to support the support rod 21 at the bottom of the baffle 11;
s4: installing a tensioning jack 4 on the sliding frame 3;
s5: moving the sliding frame 3 and finely adjusting the length of the lifting device 20 and the height of the support rod 21, so that the tensioning jack 4 is aligned to the height of the hogging moment anchor groove of the T-shaped beam 5, and the bearing end and the supporting end of the bearing platform 2 are kept in a balanced state;
s6: and after the bearing platform 2 is balanced, the tensioning jack 4 tensions the steel strands of the T-shaped beam 5.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (9)
1. The utility model provides a high mound T roof beam hogging moment tensioning equipment which characterized in that includes:
the cantilever frame is provided with a fixed end and an overhanging end, the fixed end is arranged at the upper part of the T-shaped beam, the overhanging end extends to the outer side of the T-shaped beam, and the overhanging end is connected with a baffle;
the bearing platform is provided with a bearing end and a supporting end, the middle part of the bearing platform is hung at the overhanging end through a lifting device, and the supporting end is provided with a supporting rod with adjustable height;
the sliding frame can be arranged at the bearing end in a sliding manner along the width direction of the T-shaped beam; and
and the tensioning jack is detachably arranged on the sliding frame, and the support rod is supported at the bottom of the baffle plate to keep the bearing end and the supporting end of the bearing platform in a balanced state after the tensioning jack is aligned with the hogging moment anchor groove of the T-shaped beam.
2. The high pier T-beam hogging moment tensioning device of claim 1, wherein the lifting device is a chain block.
3. The hogging moment tensioning device of claim 2, wherein the middle part of the bearing platform is tiltably provided with a suspension member, the upper end of the chain block is connected to the overhanging end, and the lower end of the chain block is connected to the suspension member.
4. The high pier T beam hogging moment tension device of claim 3, wherein the suspension elements comprise:
the two opposite sides of the middle part of the bearing platform are respectively provided with a fixed shaft, and the lower ends of the suspenders are rotatably arranged on the fixed shafts; and
the two ends of the connecting rod are respectively connected to the upper ends of the two hanging rods, and the middle of the connecting rod is connected to the lower end of the chain block.
5. The high pier T beam hogging moment tensioning device of claim 1, wherein the skid frame comprises:
the upper part of the base is provided with an accommodating groove, and the tensioning jack is embedded in the accommodating groove;
the roller is arranged on the base, and the bearing end is supported on the roller; and
the limiting rods are arranged at two opposite ends of the base and abut against two opposite sides of the bearing end.
6. The high pier T-beam hogging moment tensioning device of claim 5, wherein the load end is mounted with a first stop bar for preventing the skid from slipping off the load end.
7. The hogging moment tensioning device for the high pier T-beam as claimed in claim 5, wherein the receiving groove penetrates through the base, and a second stop lever for abutting against the tensioning jack is detachably mounted at two ends of the receiving groove.
8. The high pier T beam hogging moment tensioning device of claim 1, wherein the support bar comprises:
the sleeve is vertically arranged at the supporting end;
the lower end of the core rod is movably inserted into the sleeve, and the upper end of the core rod is supported at the bottom of the baffle; and
and the locking piece is used for locking and fixing the core rod and is arranged on the sleeve.
9. The high pier T beam hogging moment tensioning method of the high pier T beam hogging moment tensioning device according to any one of claims 1-8, characterized by comprising the following steps:
mounting a fixed end of a cantilever frame on the upper part of a T-shaped beam, so that the cantilever end of the cantilever frame extends to the outer side of the T-shaped beam;
adjusting the length of the lifting device and the height of the supporting rod to ensure that the bearing end of the bearing platform extends to the position below the flange plate of the T-shaped beam and the supporting end of the bearing platform extends to the position right below the baffle;
adjusting the height of the supporting rod to enable the supporting rod to be supported at the bottom of the baffle;
installing a tensioning jack on the sliding frame;
moving the sliding frame and finely adjusting the length of the lifting device and the height of the supporting rod, so that the tensioning jack is aligned to the height of the hogging moment anchor groove of the T-shaped beam, and the bearing end and the supporting end of the bearing platform are kept in a balanced state;
and after the bearing platform is balanced, the tensioning jack tensions the steel strand of the T-shaped beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420161.6A CN113089493B (en) | 2021-04-19 | 2021-04-19 | High pier T beam hogging moment tensioning device and tensioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420161.6A CN113089493B (en) | 2021-04-19 | 2021-04-19 | High pier T beam hogging moment tensioning device and tensioning method |
Publications (2)
| Publication Number | Publication Date |
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| CN113089493A CN113089493A (en) | 2021-07-09 |
| CN113089493B true CN113089493B (en) | 2022-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110420161.6A Active CN113089493B (en) | 2021-04-19 | 2021-04-19 | High pier T beam hogging moment tensioning device and tensioning method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113668396A (en) * | 2021-08-17 | 2021-11-19 | 广西路桥工程集团有限公司 | Portable portable hogging moment stretch-draw equipment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070144083A1 (en) * | 2005-12-23 | 2007-06-28 | Art Angelo | Temporary support system |
| CN201411911Y (en) * | 2009-05-31 | 2010-02-24 | 中国第一冶金建设有限责任公司 | Suspension attachment for pre-stressing tensioning jack |
| CN203393632U (en) * | 2013-07-27 | 2014-01-15 | 中铁七局集团第三工程有限公司 | Movable formwork device for negative bending moment tension of precast T-beam flange plate |
| CN207452728U (en) * | 2017-10-17 | 2018-06-05 | 中交第二航务工程局有限公司 | A kind of T beams underpass type hogging moment stretching construction jack stand |
| CN209699495U (en) * | 2018-11-02 | 2019-11-29 | 詹尚 | A kind of prestressed stretch-draw platform |
| CN211171658U (en) * | 2019-11-18 | 2020-08-04 | 中国建筑第八工程局有限公司 | Movable type hogging moment jack supporting device |
| CN211395395U (en) * | 2019-12-20 | 2020-09-01 | 云南建投第十建设有限公司 | T-beam hogging moment tensioning device for bridge construction |
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