CN211973136U - Cast-in-place bridge formwork support frame of large-span - Google Patents
Cast-in-place bridge formwork support frame of large-span Download PDFInfo
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- CN211973136U CN211973136U CN202020382828.9U CN202020382828U CN211973136U CN 211973136 U CN211973136 U CN 211973136U CN 202020382828 U CN202020382828 U CN 202020382828U CN 211973136 U CN211973136 U CN 211973136U
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Abstract
The utility model discloses a large-span cast-in-situ bridge formwork support frame, which is characterized in that a vertical support column and an oblique support column are arranged on a bearing platform; the vertical support columns are fixedly connected with the abutment through pull rods, the oblique support columns incline towards the midspan, the oblique support columns on the bearing platforms on the two sides form a splayed support together, and the oblique support columns are connected with the vertical support columns through oblique rod pieces in a welding mode; placing the section steel combined truss girder at the tops of the vertical supporting columns and the oblique supporting columns along the bridge direction; placing a transverse distribution beam at each node of the top of the section steel combined truss girder; arranging a rack unloading device at the top of the transverse distribution beam; and erecting a Bailey beam group at the top of the frame unloading device, and paving square timbers and bamboo plywood at the top of the Bailey beam group to form a formwork support frame. The utility model discloses improve the span and the bearing capacity of formwork support frame greatly, be applicable to and stride across the cast-in-place bridge construction of large-span under complicated topography and geomorphology conditions such as irrigation canals and ditches, mountain depression.
Description
Technical Field
The utility model relates to a technical field of bridge superstructure construction, more specifically say a cast-in-place bridge formwork support frame of large-span.
Background
With the continuous development and perfection of traffic infrastructure construction, more and more bridges are built under the condition of complex landforms. At present, cast-in-place bridges are mostly constructed by a full-framing method or a falsework method, when a ditch is crossed, a mountain is down and the like, a foundation needs to be treated or temporary supports need to be arranged by adopting a traditional construction method to meet construction requirements, but the construction quantity of the support is large, the construction difficulty is large, the safety risk is high, and even the traditional construction method cannot meet the construction requirements under individual extreme environments.
Disclosure of Invention
The utility model discloses a for avoiding above-mentioned prior art not enough, provide a cast-in-place bridge formwork support frame of large-span to be applicable to and stride across the cast-in-place bridge construction of large-span under complicated topography and geomorphology conditions such as irrigation canals and ditches, mountain down.
The utility model discloses a solve technical problem and adopt following technical scheme:
the utility model discloses cast-in-place bridge formwork support frame of large-span's structural feature is: on the bearing platform, a vertical supporting column and an oblique supporting column are respectively installed by using pre-embedded foundation bolts; the vertical supporting columns are fixedly connected with the abutments through pull rods, the oblique supporting columns incline towards the midspan, the oblique supporting columns on the bearing platforms on the two sides form a splayed support together, and the oblique supporting columns are connected with the vertical supporting columns through oblique rod pieces in a welding mode; placing the section steel combined truss girder at the tops of the vertical supporting columns and the oblique supporting columns along the bridge direction; placing a transverse distribution beam at each node of the top of the section steel combined truss girder; arranging a rack unloading device at the top of the transverse distribution beam; and erecting a Bailey beam group at the top of the frame unloading device, and paving square timbers and bamboo plywood at the top of the Bailey beam group to form a formwork support frame.
The utility model discloses cast-in-place bridge formwork support frame of large-span's structural feature also lies in: vertical support column, slant support column, shaped steel combination truss girder and bailey roof beam group are provided with the multiunit in horizontal bridge to, utilize the connected system to constitute between each group wholly, include: a connecting system is arranged between each group of the vertical supporting columns.
The utility model discloses cast-in-place bridge formwork support frame of large-span's structural feature also lies in: the section steel combined truss beam is formed by welding a large cross beam, a small cross beam, a vertical rod, an inclined rod and a cross brace through a node plate; wherein: the scissor supports are hung in the middle of the large cross beam and are connected with the vertical rods on the two sides and the lower cross beam together to form a rectangle; the lower end points of the two vertical rods are connected with the lower ends of the inclined rods on one side of each vertical rod, and the top ends of the inclined rods forming the inclined struts are supported at the bottom of the large cross beam.
The utility model discloses cast-in-place bridge formwork support frame of large-span's structural feature also lies in: the inclination angle of the oblique supporting column is 30-45 degrees.
The utility model discloses cast-in-place bridge formwork support frame of large-span's structural feature also lies in: the large cross beam and the small cross beam are both assembled and welded by double-spliced H-shaped steel or I-shaped steel, and the vertical rod, the inclined rod and the cross brace are all assembled and welded by double-spliced channel steel.
Compared with the prior art, the utility model discloses beneficial effect embodies:
the utility model discloses a set up slant support column and shaped steel combination truss girder on the cushion cap of both sides, improved formwork support frame's span and bearing capacity greatly, be applicable to and stride across the ditch, the mountain is down the cast-in-place bridge construction of large-span under the complicated topography and geomorphology condition such as, provides a new scheme for cast-in-place bridge construction formwork support frame of large-span.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a schematic view of the cross-section of the vertical surface of the structure of the present invention;
reference numbers in the figures: 1 cushion cap, 2 anchor bolts, 3 vertical supporting columns, 4 oblique supporting columns, 5 pull rods, 6 piers, 7 oblique rod pieces, 8-shaped steel combined truss girders, 9 transverse distribution beams, 10 unloading devices, 11 Bailey beam groups, 12 square timbers, 13 bamboo plywood, 14 connecting systems, 801 large cross beams, 802 small cross beams, 803 vertical rods, 804 diagonal rods and 805 cross braces.
Detailed Description
Referring to fig. 1 and 2, in the large-span cast-in-place bridge formwork support frame of the embodiment, vertical support columns 3 and oblique support columns 4 are respectively installed on a bearing platform 1 by using embedded foundation bolts 2; the vertical support columns 3 are fixedly connected with the abutments 6 through pull rods 5, the oblique support columns 4 incline towards the midspan, the oblique support columns 4 on the bearing platforms 1 on the two sides form a support in a shape of 'eight', and the oblique support columns 4 are connected with the vertical support columns 3 through oblique rod pieces 7 in a welding mode; placing a section steel combined truss girder 8 at the tops of the vertical supporting columns 3 and the oblique supporting columns 4 along the bridge direction; a transverse distribution beam 9 is placed at each node of the top of the section steel combined truss girder 8; arranging a rack unloading device 10 at the top of the transverse distribution beam 9; a Bailey beam group 11 is erected at the top of the frame unloading device 10, and square timbers 12 and bamboo plywood 13 are laid on the top of the Bailey beam group 11 to form a formwork support frame.
As shown in fig. 2, according to the difference of the width of the cast-in-place bridge, a plurality of groups of vertical supporting columns 3, oblique supporting columns 4, profile steel combined truss girders 8 and bailey girders 11 are arranged in the transverse bridge direction, and the groups are integrated by using a connecting system, including: connecting systems 14 are provided between the vertical support columns 3 of each group to ensure lateral stability of the support frame.
As shown in fig. 1 and 2, in order to improve the bearing capacity of the formwork support frame, the profile steel composite truss girder 8 is formed by welding a large cross beam 801, a small cross beam 802, a vertical rod 803, an inclined rod 804 and a cross brace 805 through a node plate; wherein: the cross braces 805 are hung in the middle of the large cross beam 801 and are connected with the vertical bars 803 on the two sides and the lower cross beam 802 together to form a rectangle; the lower end points of the two vertical rods 803 are connected with the lower ends of the inclined rods 804 on one side, and the top ends of the inclined rods 804 forming inclined struts are supported at the bottom of the large cross beam 801.
The large cross beam 801 and the small cross beam 802 are assembled and welded by double-spliced H-shaped steel or I-shaped steel, the vertical rods 803, the inclined rods 804 and the cross braces 805 are assembled and welded by double-spliced channel steel, the vertical support columns 3, the inclined support columns 4 and the inclined rod pieces 7 are spiral steel pipes or seamless steel pipes, and the pull rods 5 and the connecting systems 14 are made of channel steel.
The construction process comprises the following steps:
when the bearing platform 1 is constructed, the foundation bolts 2 are synchronously embedded, and then the abutment 6 is constructed;
after the construction of the lower part structure of the bridge is finished, a vertical support column 3 and an oblique support column 4 are respectively installed on a bearing platform 1 by using foundation bolts 2, the inclination angle of the oblique support column 4 is controlled to be 30-45 degrees, a pull rod 5 is arranged between the vertical support column 3 and an abutment, and an oblique rod piece 7 is installed on the vertical support column 3 and the oblique support column 4;
the steel section combined truss girder 8 is manufactured outside a field and is formed by assembling and welding a large cross beam 801, a small cross beam 802, a vertical rod 803, an inclined rod 804 and a cross brace 805 through node plates; hoisting equipment is adopted to hoist the combined profile steel combined truss girder 8 at the tops of the vertical support columns 3 and the oblique support columns 4, a connecting system is synchronously arranged between the profile steel combined truss girders 8 in the transverse bridge direction, the connecting system 14 is arranged between the vertical support columns 3 adjacent to the transverse bridge direction to ensure the transverse stability of the support frame, and the profile steel combined truss girder 8 is fixed with the tops of the vertical support columns 3 and the oblique support columns 4 through welding.
The transverse distribution beam 9 which is manufactured is hoisted and arranged at each node of the section steel combined truss girder 8, and the transverse distribution beam 9 is formed by assembling and welding double-spliced H-shaped steel or I-shaped steel; the top of the transverse distribution beam 9 is provided with a rack unloading device 10, and the existing rack unloading device 10 achieves the purpose of unloading by adjusting nuts on two sides and enabling the rack unloading device 10 to slide downwards along an inclined plane under the action of the gravity of the formwork support frame.
Hoisting a Bailey beam group 11 at the top of the frame unloading device 10, wherein the Bailey beam group 11 is an assembled shaping member; and (3) placing square timbers 12 on the top of the Bailey beam group 11 in the transverse bridge direction, and paving bamboo plywood 13 on the tops of the square timbers 12 to finish the erection of the formwork support frame.
Prepressing and checking the erected formwork support frame to ensure construction safety, wherein the prepressing load of the formwork support frame is not less than 1.1 times of the sum of the concrete structure dead load born by the formwork support frame and the weight of the formwork; the monitoring and monitoring of the formwork support frame are required to be enhanced in the bridge construction process. And after the construction is finished, symmetrically unloading the formwork support frames from the middle of the bridge span to two sides so as to ensure the falling safety of the formwork support frames.
Claims (5)
1. The utility model provides a cast-in-place bridge formwork support frame of large-span, characterized by: on the bearing platform (1), a vertical supporting column (3) and an oblique supporting column (4) are respectively installed by using pre-embedded foundation bolts (2); the vertical supporting columns (3) are fixedly connected with the abutments (6) through pull rods (5), the oblique supporting columns (4) incline towards the midspan, the oblique supporting columns (4) on the bearing platforms (1) at two sides form a splayed support together, and the oblique supporting columns (4) are connected with the vertical supporting columns (3) through oblique rod pieces (7) in a welding mode; placing a section steel combined truss girder (8) at the tops of the vertical supporting columns (3) and the oblique supporting columns (4) along the bridge direction; placing a transverse distribution beam (9) at each node of the top of the section steel combined truss girder (8); arranging a rack unloading device (10) at the top of the transverse distribution beam (9); a Bailey beam group (11) is erected at the top of the frame unloading device (10), and square timbers (12) and bamboo plywood (13) are laid at the top of the Bailey beam group (11) to form a formwork support frame.
2. The large-span cast-in-place bridge formwork support frame of claim 1, which is characterized in that: vertical support post (3), slant support post (4), shaped steel combination truss girder (8) and bailey beam group (11) are provided with the multiunit in the horizontal bridge to, utilize the connection system to constitute wholly between each group, include: a connecting system (14) is arranged between each group of vertical supporting columns (3).
3. The large-span cast-in-place bridge formwork support frame of claim 1, which is characterized in that: the section steel combined truss girder (8) is formed by welding a large cross beam (801), a small cross beam (802), a vertical rod (803), an inclined rod (804) and a cross brace (805) through a node plate; wherein: the scissor supports (805) are hung in the middle of the large cross beam (801) and are connected with the vertical rods (803) on the two sides and the small cross beam (802) together to form a rectangle; the lower end points of the two vertical rods (803) are connected with the lower ends of the inclined rods (804) on one side of each vertical rod, and the top ends of the inclined rods (804) forming inclined struts are supported at the bottom of the large cross beam (801).
4. The large-span cast-in-place bridge formwork support frame of claim 1, which is characterized in that: the inclined angle of the inclined supporting column (4) is 30-45 degrees.
5. The large-span cast-in-place bridge formwork support frame of claim 3, wherein: big crossbeam (801) and little crossbeam (802) all adopt double pin H shaped steel or I-steel assembly welding spare, montant (803), down tube (804) and bridging (805) all adopt double pin channel steel assembly welding spare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020382828.9U CN211973136U (en) | 2020-03-24 | 2020-03-24 | Cast-in-place bridge formwork support frame of large-span |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020382828.9U CN211973136U (en) | 2020-03-24 | 2020-03-24 | Cast-in-place bridge formwork support frame of large-span |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211973136U true CN211973136U (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020382828.9U Active CN211973136U (en) | 2020-03-24 | 2020-03-24 | Cast-in-place bridge formwork support frame of large-span |
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| Country | Link |
|---|---|
| CN (1) | CN211973136U (en) |
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- 2020-03-24 CN CN202020382828.9U patent/CN211973136U/en active Active
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