CN220413980U - Push construction double-purpose prestressing force holds formula Bei Leigang landing stage down - Google Patents
Push construction double-purpose prestressing force holds formula Bei Leigang landing stage down Download PDFInfo
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- CN220413980U CN220413980U CN202321538975.0U CN202321538975U CN220413980U CN 220413980 U CN220413980 U CN 220413980U CN 202321538975 U CN202321538975 U CN 202321538975U CN 220413980 U CN220413980 U CN 220413980U
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- bailey beam
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- 238000010276 construction Methods 0.000 title claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 81
- 239000010959 steel Substances 0.000 claims abstract description 81
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 238000009424 underpinning Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model belongs to the technical field of bridge construction, and particularly relates to a push construction dual-purpose prestress lower bearing type Bei Leigang trestle. The Bei Leigang trestle comprises two bailey beam bodies and a plurality of bridge deck distribution beams which are arranged in parallel, wherein a plurality of light bridge decks are arranged above the bridge deck distribution beams, prestressed steel strand anchors and bailey beam end reinforcing structures are respectively arranged at two ends of the bailey beam bodies, a triangular prestressed tensioning assembly is arranged in the middle of the bailey beam bodies, pulleys are arranged at the lower ends of the triangular prestressed tensioning assembly, prestressed steel strands are connected to the lower ends of the pulleys, and two ends of each prestressed steel strand are respectively connected with the corresponding prestressed steel strand anchors. According to the utility model, through the design of the movable triangular prestress tensioning component and the prestress steel strand, the problems that the existing Bei Leigang trestle is poor in stress and bearing capacity and troublesome in temporary reinforcement in a large-span structure are solved, the construction cost is saved, and the safety of the structure is improved.
Description
Technical Field
The utility model belongs to the technical field of bridge construction, and particularly relates to a push construction dual-purpose prestress lower bearing type Bei Leigang trestle.
Background
The bailey bridge is one of steel bridges, but is not equivalent to the steel bridge, is formed by light standardized truss unit components, cross beams, longitudinal beams, bridge decks, bridge seats, connecting pieces and the like which are made of high-strength steel, can be quickly assembled on site by using professional installation equipment to form truss girder bridges suitable for various spans and loads, is named as an assembled highway steel bridge in China, and is more typical. Early-stage bailey bridge is mainly applied to military, namely military steel bridge, and is widely applied to various fields such as rescue and relief work, traffic engineering, dangerous bridge reinforcement and the like except as a combat readiness steel bridge. For example, during the period of 5.12 Wenchuan earthquake in 2008, a large number of Bailey bridges are used for rescue and relief work, and the Bailey bridges play a key role in the front transportation of earthquake-resistant and relief materials, the back transportation of wounded persons and the evacuation of masses.
The conventional bailey steel bridge is practical, safe and reliable for general spans, but the height or width of the bailey beam is required to be increased for large spans to improve the bearing capacity of the bailey steel bridge, the increase of the height and width of the bailey beam cannot meet the use requirement at a limited space height, meanwhile, the steel consumption of the bailey beam is increased, so that unnecessary waste in engineering economy is caused, and in certain rescue and relief works, the conventional upper-bearing bailey steel bridge cannot be well adapted to the on-site topography, and has no timeliness for rush repair of traffic.
For the condition that a certain span or a few spans of the middle-sized continuous span bridge are damaged and replaced, the existing bridge is erected to form a lower-bearing Bei Leigang trestle as a reasonable construction scheme, but the existing replacement scheme adopts double-layer bailey or a large bailey with a size of more than ZB300, so that the problems of large weight, few social resources, large construction difficulty and the like exist, and the large-scale popularization and the use are not facilitated.
Disclosure of Invention
Aiming at the problems, the utility model aims to provide the push construction dual-purpose pre-stress lower-bearing type Bei Leigang trestle, and the Bei Leigang trestle solves the problems that the conventional Bei Leigang trestle is poor in stress and weak in bearing capacity and troublesome in temporary reinforcement in a large-span structure through the design of the movable triangular pre-stress tensioning assembly and the pre-stress steel stranded wires, saves the construction cost, increases the safety of the structure, and particularly provides powerful guarantee for timely recovery of road traffic in rescue and relief work.
The technical scheme of the utility model is as follows: the utility model provides a push away construction double-purpose prestressing force down-supported Bei Leigang landing stage, includes two bailey beam main parts that are parallel to each other, is equipped with a plurality of bridge floor distribution beams perpendicularly between the bailey beam main part that is parallel to each other, and is a plurality of bridge floor distribution beam top is equipped with a plurality of light-duty bridge deck boards, bailey beam main part both ends are equipped with prestressing force steel strand anchor and bailey beam tip additional strengthening respectively, be equipped with triangle-shaped prestressing force tensioning assembly in the middle of the bailey beam main part, triangle-shaped prestressing force tensioning assembly lower extreme is equipped with the pulley, the pulley lower extreme is connected with the prestressing force steel strand, prestressing force steel strand both ends are connected with the prestressing force steel strand anchor at bailey beam main part both ends respectively.
The bottom of the prestress steel strand anchor is provided with a fastening bolt, and the prestress steel strand anchor is fixedly connected with the bailey beam main body through the fastening bolt.
The main body of the Bailey beam is DH200 Bailey beam.
The Bailey beam end reinforcing structure comprises horizontal rods which are arranged in parallel, vertical rods which are vertically connected to the middle positions of the horizontal rods, inclined rods which are respectively connected to the two ends of the horizontal rods, and the horizontal rods are fixedly connected with the Bailey beam body through bolts.
The triangular prestress tensioning assembly comprises a truss lower chord member, bottom connection section steel and a triangular steel transmission rod which are connected in sequence, a pulley is arranged at the lower part of the triangular steel transmission rod, and a stiffening plate is arranged between the bottom connection section steel and the triangular steel transmission rod.
The novel Bailey beam is characterized in that a plurality of fulcrum reinforcing structures are arranged in the Bailey beam main body, each fulcrum reinforcing structure comprises reinforcing horizontal rods which are arranged in parallel, and reinforcing vertical rods are arranged between the reinforcing horizontal rods.
The light bridge deck adopts a honeycomb sandwich panel.
The prestress steel strand anchor is of a steel section welding assembly structure and comprises an anchor plate, connecting steel sections, connecting bolts and stiffening plates, wherein the connecting steel sections are connected with an upper chord member and a vertical rod of the bailey beam main body through bolts.
The utility model has the technical effects that: 1. according to the utility model, the movable detachable triangular prestress tensioning assembly is arranged at the upper part of the existing Bei Leigang trestle, and prestress can be applied to the upper part of the bailey beam in advance after the bailey beam is assembled, so that the cantilever part at the front end of the bailey beam has a tendency of upwards arching, has certain rigidity, and solves the problem of overlarge deflection caused by longer cantilever part at the front end in the pushing process; 2. according to the utility model, the triangular steel stay bars are arranged on the lower chords of the bailey beams, and the prestress can be transferred to the bailey beams, so that the bailey beams can adapt to the actions of different spans and different loads by adjusting the tensile force of the prestress steel strands, and the bailey beams are convenient and flexible to use; 3. according to the utility model, the movable prestress steel strand anchors and the prestress stay bars are arranged on the lower chord of the bailey beam, so that the modification of the bailey beam is reduced, the construction cost is reduced, and the use flexibility of the underlying Bei Leigang trestle is increased; 4. the bridge deck adopts the honeycomb sandwich board with the light high-strength structure, so that the weight of the steel trestle can be reduced, the investment of large-scale machines can be reduced in the installation process, and the installation of the steel trestle has good timeliness; 5. according to the utility model, the bailey vertical rod reinforcing structure is arranged at the anchoring end of the prestress steel strand and the position of the profile steel stay bar, so that the safety and stability of the bailey beam are ensured, the prestress can be effectively dispersed, the stress of the bailey beam is more uniform, and the stress concentration in the structure is avoided; 6. the utility model adopts the pushing method for construction, solves the problem that a steel trestle can be quickly erected without the assistance of a large hoisting tool when the terrain condition is poor or the rescue and relief work is carried out, and has stronger adaptability.
Further description will be made below with reference to the accompanying drawings.
Drawings
Fig. 1 is a plan view of a first part of a structure of a push-construction dual-purpose pre-stressed lower-bearing Bei Leigang trestle according to an embodiment of the utility model.
Fig. 2 is a plan view part II of a structure of a push-construction dual-purpose pre-stressed lower-bearing type Bei Leigang trestle according to an embodiment of the utility model.
Fig. 3 is a plan view of a third part of a structure of a push-construction dual-purpose pre-stressed lower-bearing Bei Leigang trestle according to an embodiment of the utility model.
Fig. 4 is a cross-sectional view of a dual-purpose prestressed lower-bearing Bei Leigang trestle structure for pushing construction according to an embodiment of the utility model.
Fig. 5 is a schematic installation diagram of a triangular prestress stay bar structure of a supporting Bei Leigang trestle capable of being detached movably for pushing construction dual-purpose prestress according to an embodiment of the utility model.
Fig. 6 is a schematic diagram of a movably detachable bailey beam end vertical rod reinforcing structure of a push construction dual-purpose pre-stress lower bearing Bei Leigang trestle according to an embodiment of the utility model.
Fig. 7 is a schematic diagram of a movably detachable bailey vertical rod reinforcing structure of a push construction dual-purpose pre-stress lower bearing type Bei Leigang trestle according to an embodiment of the utility model.
Fig. 8 is a structural diagram of a reinforcement structure of a bailey beam end portion of a push construction dual-purpose pre-stress lower bearing Bei Leigang trestle according to an embodiment of the utility model.
Fig. 9 is a schematic structural diagram of a pushing process of a push construction dual-purpose pre-stressed lower-bearing type Bei Leigang trestle according to an embodiment of the utility model.
Fig. 10 is a schematic diagram of a construction completion structure of a push construction dual-purpose pre-stressed lower-bearing type Bei Leigang trestle according to an embodiment of the utility model.
Reference numerals: 1-a bailey beam end reinforcing structure; 2-a steel strand anchoring device; 3-fastening bolts; 4-prestress steel strand; 5-bridge deck distribution beams; 6-light bridge deck; 7-bailey beam bodies; 8-triangle steel force transmission rod; 9-pulleys; 10-connecting the profile steel at the bottom; 11-a fulcrum reinforcement structure; 12-stiffening plates; 13-triangular prestress stay bars; 14-truss bottom chords; 15-reinforcing horizontal bars; 16-reinforcing vertical bars; 17-horizontal bars; 18-a vertical rod; 19-diagonal bars; 20-bailey guide beams;
Detailed Description
Embodiment 1 is as shown in fig. 1-3 and 6, a push construction double-purpose prestressing force lower-bearing Bei Leigang trestle, including two parallel arrangement's bailey beam main part 7 each other, be equipped with a plurality of bridge floor distribution beams 5 perpendicularly between the parallel arrangement's bailey beam main part 7 each other, a plurality of bridge floor distribution beams 5 top is equipped with a plurality of light bridge deck boards 6, bailey beam main part 7 both ends are equipped with prestressing force steel strand anchor 2 and bailey beam end reinforcing structure 1 respectively, be equipped with triangle-shaped prestressing force tensioning component 13 in the middle of the bailey beam main part, triangle-shaped prestressing force tensioning component 13 lower extreme is equipped with pulley 9, pulley 9 lower extreme is connected with prestressing force steel strand 4, prestressing force steel strand 4 both ends are connected with prestressing force steel strand anchor 2 at bailey beam main part both ends respectively.
In the actual use process, the movable detachable triangular prestress tensioning assembly 13 is arranged on the upper part of the existing bailey beam main body 7, prestress can be applied to the upper part of the bailey beam main body 7 in advance after the bailey beam is assembled, so that the front cantilever part of the bailey beam main body has the tendency of upwards arching, has certain rigidity, and solves the problem of overlarge deflection caused by longer front cantilever part in the pushing process.
Embodiment 2 preferably, on the basis of embodiment 1, in this embodiment, a fastening bolt 3 is disposed at the bottom of the prestressed steel strand anchor 2, and the prestressed steel strand anchor 2 is fixedly connected with the beret beam main body through the fastening bolt 3.
In the actual use process, the prestress steel strand anchor 2 is fixedly connected with the bailey beam main body through the fastening bolts 3, and the installation and the disassembly are simple and convenient.
Embodiment 3 preferably, on the basis of embodiment 1 or embodiment 2, in this embodiment, the bailey beam body 7 is a DH200 bailey beam.
In the actual use process, the Bailey beam main body 7 is a DH200 Bailey beam, and the DH200 underpinning type Bei Leigang trestle is adopted to apply prestress so as to adapt to larger span, so that the construction cost is saved.
In the embodiment 4, as shown in fig. 8, in the embodiment 1 or embodiment 3, the bailey beam end reinforcing structure 1 preferably includes horizontal rods 17 disposed parallel to each other, vertical rods 18 vertically connected to the middle position of the horizontal rods 17, inclined rods 19 respectively connected to both ends of the horizontal rods 17, and the horizontal rods 17 are fixedly connected to the bailey beam body 7 by bolts.
In the actual use process, the safety and stability of the bailey beam are guaranteed through the end reinforcing structure 1 of the bailey beam, and the prestress can be effectively dispersed, so that the stress of the bailey beam is more uniform, and the stress concentration in the structure is avoided.
Embodiment 5 preferably, in this embodiment, as shown in fig. 4 and fig. 5, on the basis of embodiment 1 or embodiment 4, the triangular prestress tensioning assembly 13 includes a truss bottom chord 14, a bottom connection section steel 10 and a triangular section steel force-transferring rod 8 which are sequentially connected, a pulley 9 is disposed at the lower part of the triangular section steel force-transferring rod 8, and a stiffening plate 12 is disposed between the bottom connection section steel 10 and the triangular section steel force-transferring rod 8.
In the actual use process, the triangular prestress tensioning assembly 13 is arranged on the lower chord member of the bailey beam, and prestress can be transferred to the bailey beam, so that the bailey beam can adapt to the actions of different spans and different loads by adjusting the tensioning force of the prestress steel strand 4, and the bailey beam is convenient and flexible to use.
Embodiment 6 preferably, in this embodiment, as shown in fig. 7, a plurality of fulcrum reinforcing structures 11 are disposed in the bailey beam body 7, the fulcrum reinforcing structures 11 include reinforcing horizontal rods 15 disposed in parallel, and reinforcing vertical rods 16 are disposed between the reinforcing horizontal rods 15.
In the actual use process, the multiple supporting point reinforcing structures 11 are arranged in the bailey beam main body 7, so that the safety and stability of the bailey beam are ensured, the prestress can be effectively dispersed, the stress of the bailey beam is more uniform, and the stress concentration in the structure is avoided.
Embodiment 7 preferably, on the basis of embodiment 1 or embodiment 6, in this embodiment, the lightweight bridge deck 6 is a honeycomb sandwich panel.
In the practical use process, the light bridge deck 6 adopts the honeycomb sandwich plate, so that the weight of the steel trestle can be reduced, the investment of large-scale machines can be reduced in the installation process, and the light bridge deck has good timeliness for the installation of the steel trestle.
Embodiment 8 preferably, on the basis of embodiment 1 or embodiment 7, in this embodiment, the prestressed steel strand anchor 2 is a steel wire welding assembly structure, and includes an anchor plate, a connecting steel wire, a connecting bolt and a stiffening plate, where the connecting steel wire is connected with an upper chord member and a vertical rod of the bailey beam main body 7 through bolts.
In the actual use process, the movable prestress steel strand anchor is arranged on the lower chord of the bailey beam, so that the modification of the bailey beam is reduced, the construction cost is reduced, and the use flexibility of the underlying Bei Leigang trestle is increased.
The actual use process of the utility model comprises the following steps:
s1: according to the topography of the rush-repair site, leveling the site, splicing DH200 bailey beams on the site, and additionally installing a common 321-type bailey guide beam at the front end;
s2: a triangular prestress tensioning assembly 13 is arranged at the position of the assembled bailey beam upper chord member, and prestress tensioning is carried out by tensioning a prestress steel strand 4 so as to improve the rigidity of a cantilever end in the pushing process;
s3, pushing the bailey beam by using a three-way jack, wherein in the pushing process, a plurality of bailey beams are assembled at the rear end of the bailey beam to increase the balance weight so as to maintain the overall stability of the bailey beam as shown in FIG 9;
s4: after the bridge deck system is installed, as shown in fig. 10, the triangular prestress tensioning assembly 13 is converted to the lower part of the bailey beam for tensioning and anchoring;
s5: after the bailey beam is tensioned and anchored, the bridge deck distribution beam is installed and the light bridge deck is paved, so that the Bei Leigang trestle bridge is built.
According to the utility model, the movable detachable triangular prestress tensioning assembly 13 and the prestress steel strands are arranged on the bailey beam of the steel trestle, and the bearing capacity of the bailey beam can be increased, the applicable span of the bailey beam can be increased, meanwhile, the erection time of the Bei Leigang trestle can be reduced, the construction efficiency can be improved, and the cost can be saved by tensioning the external prestress tendons of the bailey beam in the installation process and the use process of the bailey beam. The construction process of pushing and installing by utilizing the three-way jack not only increases the flexibility of installation, but also reduces the investment of large-scale construction machines and tools, and has good timeliness for emergency bridge rush. The bridge deck adopts a light and high-strength honeycomb core board, has the characteristics of small dead weight and simple and convenient assembly and disassembly, and is more suitable for emergency rush construction operation.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (8)
1. The utility model provides a push away construction double-purpose prestressing force down holds formula Bei Leigang landing stage which characterized in that: including two bailey beam main parts (7) that are parallel to each other, be equipped with a plurality of bridge floor distribution beams (5) perpendicularly between bailey beam main parts (7) that are parallel to each other, a plurality of bridge floor distribution beams (5) top is equipped with a plurality of light-duty bridge deck boards (6), bailey beam main part (7) both ends are equipped with prestressing force steel strand anchor (2) and bailey beam end additional strengthening (1) respectively, be equipped with triangle-shaped prestressing force tensioning component (13) in the middle of the bailey beam main part, triangle-shaped prestressing force tensioning component (13) lower extreme is equipped with pulley (9), pulley (9) lower extreme is connected with prestressing force steel strand (4), prestressing force steel strand (4) both ends are connected with prestressing force steel strand anchor (2) at bailey beam main part both ends respectively.
2. The pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle according to claim 1, wherein the pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle is characterized in that: the bottom of the prestress steel strand anchor (2) is provided with a fastening bolt (3), and the prestress steel strand anchor (2) is fixedly connected with the bailey beam main body through the fastening bolt (3).
3. The pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle according to claim 1, wherein the pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle is characterized in that: the Bailey beam main body (7) is a DH200 Bailey beam.
4. The pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle according to claim 1, wherein the pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle is characterized in that: the Bailey beam end reinforcing structure (1) comprises horizontal rods (17) which are arranged in parallel, vertical rods (18) which are vertically connected to the middle positions of the horizontal rods (17), inclined rods (19) which are respectively connected to the two ends of the horizontal rods (17), and the horizontal rods (17) are fixedly connected with the Bailey beam main body (7) through bolts.
5. The pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle according to claim 1, wherein the pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle is characterized in that: the triangular prestress tensioning assembly (13) comprises a truss lower chord member (14), bottom connection section steel (10) and a triangular profile steel force transmission rod (8) which are sequentially connected, a pulley (9) is arranged at the lower part of the triangular profile steel force transmission rod (8), and a stiffening plate (12) is arranged between the bottom connection section steel (10) and the triangular profile steel force transmission rod (8).
6. The pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle according to claim 1, wherein the pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle is characterized in that: be equipped with a plurality of fulcrum reinforcing structure (11) in bailey beam main part (7), fulcrum reinforcing structure (11) are including parallel arrangement's reinforcement horizontal pole (15), be equipped with between reinforcement horizontal pole (15) and strengthen montant (16).
7. The pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle according to claim 1, wherein the pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle is characterized in that: the light bridge deck (6) adopts a honeycomb sandwich panel.
8. The pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle according to claim 1, wherein the pushing construction dual-purpose prestressed lower-bearing type Bei Leigang trestle is characterized in that: the prestress steel strand anchor (2) is of a steel section welding assembly structure and comprises an anchor plate, connecting steel sections, connecting bolts and stiffening plates, wherein the connecting steel sections are connected with an upper chord member and a vertical rod of the bailey beam main body (7) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321538975.0U CN220413980U (en) | 2023-06-16 | 2023-06-16 | Push construction double-purpose prestressing force holds formula Bei Leigang landing stage down |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321538975.0U CN220413980U (en) | 2023-06-16 | 2023-06-16 | Push construction double-purpose prestressing force holds formula Bei Leigang landing stage down |
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| CN220413980U true CN220413980U (en) | 2024-01-30 |
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| CN202321538975.0U Active CN220413980U (en) | 2023-06-16 | 2023-06-16 | Push construction double-purpose prestressing force holds formula Bei Leigang landing stage down |
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| CN (1) | CN220413980U (en) |
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2023
- 2023-06-16 CN CN202321538975.0U patent/CN220413980U/en active Active
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