CN210104533U - Tie bar flat bending device capable of reducing prestress loss - Google Patents
Tie bar flat bending device capable of reducing prestress loss Download PDFInfo
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- CN210104533U CN210104533U CN201920691575.0U CN201920691575U CN210104533U CN 210104533 U CN210104533 U CN 210104533U CN 201920691575 U CN201920691575 U CN 201920691575U CN 210104533 U CN210104533 U CN 210104533U
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- tie bar
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- pipe
- tie rod
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Abstract
The utility model provides a tie bar flat bending device for reducing prestress loss, which comprises a tie bar box component a and a tie bar box component b which are arranged at flat bending turning points at two ends of a tie bar, wherein the tie bar box component a and the tie bar box component b have similar structures; the tie bar box assembly a and the tie bar box assembly b are arranged on the main beam of the arch bridge through corresponding supports, and the shape of the tie bar is limited through the arc lines of the tie bar box assembly a and the tie bar box assembly b so as to achieve the purpose that the tie bar is bent flatly according to a specified curve; the utility model has simple structure, strong practicability, convenient construction and fast speed, the tie bar flat bending device can be directly transported to a construction site for installation after being processed and finished in a factory, the construction is convenient, the construction progress can be accelerated, and the problem of long construction period caused by the need of pre-embedding tie bar pipes and pouring concrete blocks in the prior art is solved; the utility model discloses improved the tie rod and turned to the position atress, the utility model discloses can guarantee that the tie rod is linear smooth-going, the prestressing loss is less, improve the safety of structure.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering technique and specifically relates to a reduce tie rod flat bending device of prestressing loss.
Background
Along with the rapid development of economy, highways are rapidly developed, and particularly, the thirteenth five-year planning outline of the department of transportation clearly proposes to accelerate the development of bridge industrialization.
The assembled bridge is the key direction for bridge construction development in future in China, and is beneficial to saving resource and energy, reducing construction pollution and improving labor production efficiency and quality safety level. At present, domestic fabricated bridges have achieved certain performance, but most of the fabricated bridges are limited to medium and small spans (the spans are less than 50 m). Therefore, a novel assembled bridge structure with strong spanning capability, high strength, light dead weight, high rigidity, proper cost and simple construction process is urgently sought.
Because the arch bridge is stressed clearly and has beautiful shape, the arch bridge is a bridge type which is widely applied. The tied arch bridge hanger rods have various arrangement forms, and are commonly provided with vertical hanger rods, and inclined hanger rods are also called Nielsen systems and reticular hanger rod systems. Compared with the common vertical suspender arch, the Nielsen system arch using the inclined suspender to replace the vertical suspender has the advantages that the axial stress of the arch rib and the beam is not obviously different, the bending moment is greatly reduced, and the deflection matched with the bending moment is greatly reduced. The high-speed railway in China is built with a plurality of Nielsen arches with spans of 96m, 112m, 128m and the like. The netted suspender arch bridge is a tied arch bridge adopting a netted oblique suspender arrangement mode, the oblique suspender and other suspenders are crossed at least for two times, compared with a Nielsen system arch bridge, the netted suspender arch bridge reduces bending moment of arch ribs and beams to a greater extent, the stress is more reasonable, and the arch ribs and the beams are often made to be finer. From the 60 s of the 20 th century to date, a reticular boom arch bridge of about 100 seats has been built in the world. The early famous bridge is a Fermanen bridge constructed in 1963 in Germany, and the recent long-span net-shaped suspender arch bridge is an intersection bridge constructed in Neimenheng in 2013 in the Netherlands, and the main bridge structure of the bridge is a single-rib (a section of arch rib above a bridge floor is branched) underpad steel tie-bar arch with the span of 285 m. In addition, dozens of road and railway net arch bridges are built in Norway, Germany, Japan and America, and the application of the bridge is not seen in China.
The tied arch bridge is also called as a thrust-free arch type combined system bridge, and some tied arch bridges are called as a beam arch combined bridge. The tied arch bridge is characterized in that two basic structures of a beam and an arch are combined in an arch bridge span structure to bear load together, so that the structural characteristics and the combination effect of the bending and the pressing of the beam and the arch are fully exerted, and the purpose of saving materials is achieved. The tied arch bridge is a combined structure bridge which is formed by the cooperative work of arch ribs, hanger rod upright posts, tie rods, traffic lane beam plates, a bridge deck system and the like, and is mainly characterized in that the tie rods bear the horizontal thrust of arch springing. From the stress characteristic, the tied arch bridge is the organic combination of an arch bridge, a beam bridge and a suspension bridge.
The tied arch bridge is an external statically determinate structure and has two characteristics of large spanning capacity of the arch bridge and strong adaptability of the simply supported girder bridge to the foundation. When the elevation of the bridge deck is strictly limited and the bridge bottom is required to ensure larger clearance, or when the geological condition of the abutment foundation is poor and settlement is easy to occur, but a larger span is required to be ensured, the tied arch bridge is a superior bridge type. The conventional construction method for the steel pipe concrete arch bridge tie rod system cannot meet construction requirements, construction steps are complex, organization is difficult, namely, steel pipes and concrete blocks are embedded in the flat bends of the tie rods, namely, after the main beam is constructed, the tie rod embedded steel pipes and the outer concrete are constructed on the main beam, so that the tie rod cable penetrating time is influenced, the construction period is long, quality control is not facilitated, and the next process is influenced.
Disclosure of Invention
To the not enough of prior art, the utility model provides a reduce flat curved device of tie rod of prestressing force loss.
The technical scheme of the utility model is that: a tie bar flat bending device for reducing prestress loss comprises a tie bar box assembly a and a tie bar box assembly b which are arranged at flat bending turning points at two ends of a tie bar, wherein the structure of the tie bar box assembly a is similar to that of the tie bar box assembly b; the tie bar box assembly a and the tie bar box assembly b are arranged on the main beam of the arch bridge through corresponding supports, and the shape of the tie bar is limited through the arc lines of the tie bar box assembly a and the tie bar box assembly b so as to achieve the purpose that the tie bar is bent flatly according to a specified curve;
the tie bar box assembly a comprises a tie bar supporting bottom plate a, a tie bar top plate a, tie bar stiffening ribs a, tie bar partition plates a and tie bar pipe assemblies a, wherein a plurality of tie bar partition plates a are arranged between the tie bar supporting bottom plate a and the tie bar top plate a, a plurality of tie bar pipe assemblies a are arranged on the tie bar partition plates a side by side, and the tie bar stiffening ribs a are also arranged between two adjacent tie bar pipe assemblies a; one end of a plurality of tie rods is arranged on the tie rod box component a through a tie rod pipe component a;
the tie bar box assembly b comprises a tie bar supporting base plate b, a plurality of tie bar pipe assemblies b and a tie bar parallel connection, wherein the tie bar supporting base plate b is provided with a plurality of tie bar pipe assemblies b, the lower ends of the tie bar pipe assemblies b are fixed through tie bar stiffening ribs a, the middle and upper ends of the tie bar pipe assemblies b are fixedly connected through the tie bar parallel connection, and the other ends of the tie bar pipes are arranged on the upper tie bar box assembly b through the tie bar pipe assemblies b.
Further, the tie rod pipe assembly a and the tie rod pipe assembly b are identical in structure.
Further, the tie rod pipe assembly a comprises a tie rod vertical connection a and a plurality of tie rod pipe perforations arranged on the tie rod vertical connection a.
Further, the tie rod pipe assembly b comprises a tie rod vertical connection b and a plurality of tie rod pipe perforations arranged on the tie rod vertical connection b.
Furthermore, a plurality of tie bar partition plates b are arranged between two adjacent tie bar pipe assemblies b.
Furthermore, tie bar parallel connection is arranged between the tie bar pipe through holes of two adjacent tie bar pipe assemblies a, and tie bar stiffening ribs b are arranged between the tie bar pipe through holes of two adjacent tie bar pipe assemblies b.
Further, the tie rod box assembly a and the tie rod box assembly b are both made of stainless steel materials, the surfaces of the tie rod box assembly a and the tie rod box assembly b are polished to st3 level and are treated by hot galvanizing, and the thickness of a coating is larger than 120 microns.
Furthermore, the through hole of the tie rod pipe is made of a seamless steel pipe, and the inner side of the outlet end of the tie rod pipe is ground into a circular arc surface.
The utility model has the advantages that:
1. the utility model has simple structure, strong practicability, convenient construction and fast speed, the tie bar flat bending device can be directly transported to a construction site for installation after being processed and finished in a factory, the construction is convenient, the construction progress can be accelerated, and the problem of long construction period caused by the need of pre-embedding tie bar pipes and pouring concrete blocks in the prior art is solved;
2. the utility model improves the stress of the tie bar and the steering part, the utility model can ensure the smooth line shape of the tie bar, and the prestress loss is smaller;
3. the utility model is safe and reliable, the device can lead the folded steel pipe arch to apply prestress as soon as possible, and the safety of the structure is improved;
4. the prior art needs be with tie rod pre-buried on the girder to at its surface pouring concrete, thereby influence the tie rod reeving time, through the utility model discloses a flat curved device can reduce the tie rod reeving time greatly, accelerates the construction progress.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a tie rod box assembly a of the present invention;
fig. 3 is a schematic structural view of a tie rod box assembly b of the present invention;
in the figures, the 1-tie rod, the 2-tie rod box assemblies a, the 3-tie rod box assemblies b,
21-tie-bar support base plates a, 22-tie-bar top plates a, 23-tie-bar stiffeners a, 24-tie-bar bulkheads a, 25-tie-bar pipe assemblies a, 26-tie-bar vertical links a, 27-tie-bar pipe perforations;
31-tie bar support base plate b, 32-tie bar pipe assembly b, 33-tie bar parallel connection, 34-tie bar stiffening rib b, 35-tie bar vertical connection b, 36-tie bar pipe perforation, 37-tie bar clapboard b.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, a tie bar flat bending device for reducing prestress loss comprises a tie bar box assembly a2 and a tie bar box assembly b3 which are arranged at flat bending turning points at two ends of a tie bar 1, wherein the tie bar box assembly a2 and the tie bar box assembly b3 are similar in structure, the tie bar box assembly a2 and the tie bar box assembly b3 are mainly formed by welding various types of steel plates and steel materials, wherein the welding adopts penetration welding, the surface of the fusion welding is ground into st3 grade, then the surface of the fusion welding is treated by hot galvanizing, and the coating thickness is larger than 120 μm; when the tie bar box assembly a2 and the tie bar box assembly b3 are arranged on a main beam of an arch bridge through corresponding supports, the shape of the tie bar 1 is limited through main pipe arcs of the tie bar box assembly a2 and the tie bar box assembly b3 so as to achieve the purpose that the tie bar is bent flatly according to a specified curve, the tie bar is smooth in line shape, the structure stress is reliable and reasonable, the cable penetrating time of the tie bar can be reduced, and a formed steel pipe arch and the tie bar cable form a stable system.
As shown in fig. 2, the tie-bar box assembly a2 comprises a tie-bar support base plate a21, a tie-bar top plate a22, a tie-bar stiffener a23, a tie-bar baffle a24 and a tie-bar pipe assembly a25, wherein a plurality of tie-bar baffle a24 are arranged between the tie-bar support base plate a21 and the tie-bar top plate a22, a plurality of tie-bar pipe assemblies a25 are arranged on the tie-bar baffle a24 side by side, the tie-bar pipe assembly a25 comprises a tie-bar vertical connection a26 and a plurality of tie-bar pipe through holes 27 arranged on the tie-bar vertical connection a26, the tie-bar pipe through holes 27 are made of seamless steel pipes, and the inner sides of outlet ends of the tie-bar pipe through holes. And tie bar stiffeners a23 are provided between tie bar tube perforations 27 of two adjacent tie bar tube assemblies a25, wherein the number of tie bar tube assemblies a25 in this embodiment is 2, 2 tie bar tube assemblies a25 are juxtaposed on a tie bar bulkhead a24, and 3 tie bar tube perforations 27 are provided per tie bar tube assembly a 25.
As shown in fig. 3, the tie-bar box assembly b3 includes a tie-bar support base plate b31, a plurality of tie-bar pipe assemblies b32 and a tie-bar parallel connection 33, wherein the tie-bar support base plate b31 is provided with a plurality of tie-bar pipe assemblies b32, the number of the tie-bar pipe assemblies b32 in this embodiment is 2, the lower end of 2 tie-bar pipe assemblies b32 is provided with a tie-bar stiffening rib b34, the upper ends of 2 tie-bar pipe assemblies b32 are fixedly connected by the plurality of tie-bar parallel connection fasteners 33, and a plurality of tie-bar partition plates b37 are further provided between two adjacent tie-bar pipe assemblies b 32. The tie rod pipe assembly b32 comprises a tie rod vertical connection b35 and 3 tie rod pipe through holes 36 arranged on the tie rod vertical connection b35, wherein the tie rod pipe through holes 36 are made of seamless steel pipes, and the inner sides of outlet ends of the tie rod pipe through holes are ground into circular arc surfaces.
The foregoing embodiments and description have been provided to illustrate the principles and preferred embodiments of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed.
Claims (9)
1. A tie bar flat bending device for reducing prestress loss is characterized in that: the tie rod box assembly comprises a tie rod box assembly a and a tie rod box assembly b which are arranged at flat-bending turning points at two ends of a tie rod, wherein the tie rod box assembly a and the tie rod box assembly b are similar in structure; the tie bar box assembly a and the tie bar box assembly b are arranged on the main beam of the arch bridge through corresponding supports, and the shape of the tie bar is limited through the arc lines of the tie bar box assembly a and the tie bar box assembly b so as to achieve the purpose that the tie bar is bent flatly according to a specified curve;
the tie bar box assembly a comprises a tie bar supporting bottom plate a, a tie bar top plate a, tie bar stiffening ribs a, tie bar partition plates a and tie bar pipe assemblies a, wherein a plurality of tie bar partition plates a are arranged between the tie bar supporting bottom plate a and the tie bar top plate a, a plurality of tie bar pipe assemblies a are arranged on the tie bar partition plates a side by side, and the tie bar stiffening ribs a are also arranged between two adjacent tie bar pipe assemblies a; one end of a plurality of tie rods is arranged on the tie rod box component a through a tie rod pipe component a;
the tie bar box assembly b comprises a tie bar supporting base plate b, a plurality of tie bar pipe assemblies b and a tie bar parallel connection, wherein the tie bar supporting base plate b is provided with a plurality of tie bar pipe assemblies b, the lower ends of the tie bar pipe assemblies b are fixed through tie bar stiffening ribs a, the middle and upper ends of the tie bar pipe assemblies b are fixedly connected through the tie bar parallel connection, and the other ends of the tie bar pipes are arranged on the upper tie bar box assembly b through the tie bar pipe assemblies b.
2. A tie bar flatbending apparatus for reducing a loss of prestress according to claim 1, wherein: the tie rod pipe assembly a and the tie rod pipe assembly b have the same structure.
3. A tie bar flatbending apparatus for reducing a loss of prestress according to claim 2, wherein: the tie rod pipe assembly a comprises a tie rod vertical connection a and a plurality of tie rod pipe perforations arranged on the tie rod vertical connection a.
4. A tie bar flatbending apparatus for reducing a loss of prestress according to claim 2, wherein: the tie rod pipe assembly b comprises a tie rod vertical connection b and a plurality of tie rod pipe perforations arranged on the tie rod vertical connection b.
5. A tie bar flatbending apparatus for reducing a loss of prestress according to claim 1, wherein: and a plurality of tie bar partition plates b are also arranged between two adjacent tie bar pipe assemblies b.
6. A tie bar flatbending apparatus for reducing a loss of prestress according to claim 3, wherein: and a tie bar parallel connection is arranged between the tie bar pipe through holes of two adjacent tie bar pipe assemblies a.
7. The tie bar flatbending apparatus for reducing a loss of prestress according to claim 4, wherein: tie bar stiffeners b are provided between tie bar tube perforations of two adjacent tie bar tube assemblies b.
8. A tie bar flatbending apparatus for reducing a loss of prestress according to claim 1, wherein: the tie rod box component a and the tie rod box component b are both made of stainless steel materials, the surfaces of the tie rod box component a and the tie rod box component b are polished to st3 grade, and the surfaces of the tie rod box component a and the tie rod box component b are provided with metal zinc coatings with the thickness of more than 120 mu m.
9. A tie bar flatbending apparatus for reducing a loss of prestress according to claim 3 or 4, wherein: the tie rod pipe perforation is made of seamless steel pipes, and the inner side of the outlet end of the tie rod pipe perforation is an arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920691575.0U CN210104533U (en) | 2019-05-15 | 2019-05-15 | Tie bar flat bending device capable of reducing prestress loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920691575.0U CN210104533U (en) | 2019-05-15 | 2019-05-15 | Tie bar flat bending device capable of reducing prestress loss |
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| Publication Number | Publication Date |
|---|---|
| CN210104533U true CN210104533U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920691575.0U Active CN210104533U (en) | 2019-05-15 | 2019-05-15 | Tie bar flat bending device capable of reducing prestress loss |
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| Country | Link |
|---|---|
| CN (1) | CN210104533U (en) |
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- 2019-05-15 CN CN201920691575.0U patent/CN210104533U/en active Active
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