CN214362916U - Modular cast-in-place box girder supporting structure - Google Patents
Modular cast-in-place box girder supporting structure Download PDFInfo
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- CN214362916U CN214362916U CN202023305910.0U CN202023305910U CN214362916U CN 214362916 U CN214362916 U CN 214362916U CN 202023305910 U CN202023305910 U CN 202023305910U CN 214362916 U CN214362916 U CN 214362916U
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Abstract
The utility model provides a modular cast-in-place box girder supporting structure, include: the device comprises a prestressed pipe pile foundation, a steel pipe column, a template and a road bed; the multiple groups of prestressed pipe pile foundations are distributed in the soft foundation in an array mode, the lower ends of the prestressed pipe pile foundations penetrate into the completely weathered granite layer, and the upper end of each group of prestressed pipe pile foundations is provided with a concrete bearing platform; each steel pipe column is fixed on a concrete bearing platform, and a bearing beam is respectively fixed on each row of steel pipe columns; a plurality of bailey frames are erected on a plurality of bearing beams, and a plurality of distributing beams are transversely arranged on the plurality of bailey frames; the template comprises a bottom plate and a side plate, a plurality of square timbers are arranged between the bottom plate and the distribution beam along the bridge direction, and a side mold supporting frame is arranged between the side plate and the distribution beam; the road bed is located the stereoplasm subaerial, has built the formula full hall support of bowl knot on the road bed, and the upper portion of the formula full hall support of bowl knot is provided with the top layer board, is provided with a plurality of square timbers along the bridge direction between bottom plate and the curb plate of top layer board and template.
Description
Technical Field
The utility model belongs to bridge construction field, concretely relates to modular cast-in-place box girder supporting structure.
Background
When a large-span bridge is constructed by a cast-in-place box girder, a support needs to be erected, the support needs to ensure the stability of a foundation, if a part of the bridge spans large-area soft foundations such as a fishpond, all sludge in the fishpond generally needs to be cleaned, gravel materials with good water coating performance are completely filled, layered rolling is carried out until the compaction degree reaches more than 95%, and finally concrete is laid on the surface of the compacted filler for hardening. If the area of the fish pond is large, the sludge cleaning volume and the volume of the filling material will be greatly increased, and the cost is sharply increased.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is an object of the present invention to provide a combined cast-in-place box girder support structure for overcoming the above problems or at least partially solving or alleviating the above problems.
The utility model provides a modular cast-in-place box girder bracket structure for cast-in-place box girder carries out the bridge, soft ground is strideed across to one section of bridge, and firm ground is strideed across to another section, include:
the prestressed pipe pile foundations are distributed in the soft foundation along the bridge direction in an array mode, the lower ends of the prestressed pipe pile foundations penetrate into the completely weathered granite layer, and the upper end of each prestressed pipe pile foundation is provided with a concrete bearing platform;
each steel pipe column is fixed on one concrete bearing platform, and each row of steel pipe columns are respectively fixed with one bearing beam;
the plurality of bailey frames are bridged on the plurality of bearing beams along the bridge direction, and a plurality of distributing beams are transversely loaded on the plurality of bailey frames;
the template comprises a bottom plate and a side plate, a plurality of square timbers are arranged between the bottom plate and the distribution beam along the bridge direction, and a side mold support frame is arranged between the side plate and the distribution beam;
the road bed, the road bed is located the stereoplasm subaerial, it has bowl to detain formula full hall support to build on the road bed, the upper portion that bowl detained formula full hall support is provided with the top layer board, the top layer board with the bottom plate with be provided with a plurality of square timbers along the bridge direction between the curb plate.
The utility model discloses a cast-in-place box girder supporting structure of combination formula still has following characteristic.
Optionally, a gravel layer is laid on the road bed, and a concrete layer is laid on the gravel layer.
Optionally, a first cross brace is connected between every two transversely adjacent steel pipe columns.
Optionally, a plurality of second cross braces are transversely connected between the bailey frames.
Optionally, the bottom of the bowl-buckle type full hall support is provided with a floor sweeping rod, and the middle part and the upper part are provided with a plurality of third cross braces.
Optionally, two prestressed pipe pile foundations are arranged below the concrete bearing platform at two ends of each row, and three prestressed pipe pile foundations are arranged below the concrete bearing platforms at other positions.
Optionally, the concrete cap has a top steel bar layer and a bottom steel bar layer, the steel bars in all the top steel bar layers on the concrete cap on the three prestressed pipe column foundations are distributed in a rectangular grid shape, and the steel bars in the bottom steel bar layers are distributed in a triangular overlapping staggered manner.
The utility model discloses a cast-in-place box girder supporting structure of combination formula stridees across the soft foundation department of large tracts of land such as pond at the bridge and adopts steel pipe beam column support, stridees across hard ground department at the bridge and adopts the bowl to detain full hall support, carries out cast-in-place box girder through the structure of amalgamation between two kinds, has avoided the processing to the soft foundation of large tracts of land such as pond, has reduced construction cost.
Drawings
Fig. 1 is a schematic structural view of a combined cast-in-place box girder support of the utility model;
FIG. 2 is a sectional view taken along line A-A in FIG. 1;
FIG. 3 is a sectional view taken along line B-B in FIG. 1;
FIG. 4 is a bottom reinforcement profile of the concrete cap of FIG. 1;
fig. 5 is a top rebar distribution diagram of the concrete cap of fig. 1.
In the above figures: 1, pre-stressing a pipe pile foundation; 2 completely weathered granite layers; 3, concrete bearing platform; 301 top reinforcing steel bar layer; 302 bottom steel bar layer; 4, steel pipe columns; 5, bearing beams; 6, a Bailey frame; 7, a distribution beam; 8, template; 9 square wood; 10 side mould supporting frames; 11-way beds; 12 bowl buckle type full support; 13, a top supporting plate; 14 a gravel layer of stone slag; 15 a concrete layer; 16 a first scissor brace; 17 a second scissor brace; 18 a ground sweeping bar; 19 a third scissor brace; 20 box beams.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Detailed Description
Example 1
Referring to fig. 1, fig. 2 and fig. 3, an embodiment of the utility model provides a modular cast-in-place box girder supporting structure for cast-in-place box girder 20 is carried out to the bridge, soft ground is strideed across to one section of bridge, and firm ground is strideed across to another section, the utility model discloses a modular cast-in-place box girder supporting structure includes: the device comprises a plurality of groups of prestressed pipe pile foundations 1, a plurality of steel pipe columns 4, a template 8 and a road bed 11; the multiple groups of prestressed pipe pile foundations 1 are distributed in the soft foundation along the bridge direction in an array mode, the lower ends of the prestressed pipe pile foundations 1 penetrate into the completely weathered granite layer 2, and the upper end of each group of prestressed pipe pile foundations 1 is provided with a concrete bearing platform 3; each steel pipe column 4 is fixed on one concrete bearing platform 3, and a bearing beam 5 is fixed on each row of steel pipe columns 4; a plurality of bailey frames 6 are bridged on the bearing beams 5 along the bridge direction, and a plurality of distributing beams 7 are transversely mounted on the bailey frames 6; the formwork 8 comprises a bottom plate and a side plate, a plurality of square timbers 9 are arranged between the bottom plate and the distribution beam 7 along the bridge direction, and a side mould supporting frame 10 is arranged between the side plate and the distribution beam 7; the road bed 11 is located the stereoplasm subaerial, it detains formula full hall support 12 to have built the bowl on the road bed 11, the upper portion that the formula full hall support 12 was detained to the bowl is provided with top layer board 13, top layer board 13 with be provided with a plurality of square timbers 9 along the bridge direction between the bottom plate of template 8 and the curb plate.
According to box girder drawing design and field conditions, through multi-party research, the adopted support system is finally determined to be the combination of a steel pipe pile column type support and a bowl buckle type full-hall support 12, wherein the first span and the second span are in a 20.58m range and adopt a structure of a prestressed pipe pile cap foundation 1+ a steel pipe column 4+ a bailey truss 6+ a bearing beam 5, and the bailey truss 6 is designed according to one span per 9 m; wherein, the lower end of the prestressed pipe pile cap foundation 1 is driven into the completely weathered granite stratum 2. The remaining 14.42 meters of the second span and the last span range adopt a concrete bearing platform foundation + bowl buckle type full hall bracket 12. The template 8 is a bamboo plywood with a full-wood template structure, and the thickness of the bamboo plywood is 1.5 cm. The square timber 9 with the thickness of 10 multiplied by 10cm is arranged under the bottom die and the side die in the range of the bowl-buckled type full-hall support 12, the square timber 9 with the thickness of 15 multiplied by 15cm is arranged under the bottom die in the range of the steel pipe pile beam column type support, and the distance is 30 cm.
The distribution beams 7 are arranged in the axial direction of the full length of an I20a I-steel transverse bridge at a distance of 0.8 m. Belley frames 6 are arranged below the distribution beams 7, and the Belley frames 6 are arranged along the bridge direction.
The steel pipe pile 4 adopts
The steel pipe and the bearing beam 5 are made of 2HN 600X 200X 11X 7I steel. The lower part of the steel pipe pile 4 is designed to be a concrete bearing platform 3+ a prestressed pipe pile foundation 1.
In the bowl-buckled type full-hall support 12, the arrangement space of upright rods of flange plate sections of a box girder 20 to be cast in situ is 0.6m multiplied by 1.2m, and the step distance is 1.2 m; at the transition section between the flange plate of the box girder 20 and the side box chamber, the arrangement distance of the upright posts is 0.6m multiplied by 0.6m, and the step pitch is 1.2 m; in the web area of the box girder 20, the arrangement distance of the upright posts is 0.6m multiplied by 0.6m, and the step pitch is 1.2 m; in the top and bottom plate areas of the box girder 20, the arrangement pitch of the vertical rods is 0.6m × 1.2m, and the step pitch is 1.2 m.
Example 2
Referring to fig. 2 and 3, a gravel layer 14 is laid on the road bed 11, and a concrete layer 15 is laid on the gravel layer 14.
The road bed 11 has a compaction degree of more than 90%, the gravel layer 14 has a thickness of 30cm, the compaction degree of more than 95%, and the concrete layer 15 is C15 concrete with a thickness of 15 cm.
Example 3
Referring to fig. 2, on the basis of embodiment 2, a first cross brace 16 is connected between every two laterally adjacent steel pipe columns 4.
The transverse bridge direction of the steel pipe pile 4 is all provided with first cross braces 16 to transversely reinforce the steel pipe pile 4, and the first cross braces 16 are made of I20a I steel.
Example 4
Referring to fig. 2, on the basis of embodiment 2, a second cross brace 17 is transversely connected between the bailey frames 6.
And a plurality of groups of second cross braces 17 are transversely connected between every two adjacent bailey frames 6, so that the plurality of bailey frames 6 form a whole.
Example 5
Referring to fig. 2, on the basis of embodiment 2, the bottom of the bowl-button type full hall support 12 is provided with a floor sweeping rod 18, and the middle and upper parts are provided with third cross braces 19.
A plurality of third bridging 19 fixed connection have improved the horizontal intensity between the pole setting between the full hall support 12 of bowl knot formula, sweep the lower extreme that pole setting is fixed to pole 18.
Example 6
Referring to fig. 4 and 5, on the basis of embodiment 2, two prestressed pipe pile foundations 1 are arranged below the concrete bearing platforms 3 at both ends of each row, and three prestressed pipe pile foundations 1 are arranged below the concrete bearing platforms 3 at other positions.
Adopting prestressed concrete pipe piles to treat a soft foundation, wherein each prestressed pipe pile foundation 1 is designed to have the length of 18m and the diameter of 40cm, a C30 concrete bearing platform 3 with the length of 1.8m multiplied by 0.6m is arranged below each steel pipe upright post 4 corresponding to a beam bottom web of a box girder 20, three prestressed pipe pile foundations 1 are arranged below the concrete bearing platform 3 according to the structure, and the three prestressed pipe pile foundations 1 are distributed on the outer side of the steel pipe posts 4 in an isosceles triangle shape in the vertical direction; a C30 concrete bearing platform 3 with the thickness of 1m multiplied by 1.8m multiplied by 0.6m is arranged below each steel pipe column 4 corresponding to the flange plate of the box girder 20, two prestressed pipe pile foundations 1 are arranged below the concrete bearing platform 3 according to the structure, and the two prestressed pipe pile foundations 1 are symmetrically distributed on two sides of the steel pipe column 4 in the vertical direction.
Example 7
Referring to fig. 4 and 5, on the basis of the embodiment 6, the concrete platform 3 has a top steel bar layer 301 and a bottom steel bar layer 302, the steel bars in all the top steel bar layers 301 of the concrete platform 3 on the three prestressed pipe column foundations 1 are distributed in a rectangular grid shape, and the steel bars in the bottom steel bar layers 302 are distributed in a triangular overlapping and staggered manner.
The diameter of the reinforcing steel bars in the top reinforcing steel bar layer 301 is 12mm, and the distribution interval is 100 mm; the diameter of the reinforcing bars in the bottom reinforcing layer 302 is 32mm, and the distribution distance is 100 mm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (7)
1. A modular cast-in-place box girder support structure for cast-in-place box girders (20) for a bridge, one section of which spans a soft foundation and the other section spans a hard ground, comprising:
the device comprises a plurality of groups of prestressed pipe pile foundations (1), wherein the plurality of groups of prestressed pipe pile foundations (1) are distributed in a soft foundation along the bridge direction in an array mode, the lower ends of the prestressed pipe pile foundations (1) penetrate into a completely weathered granite layer (2), and the upper end of each group of prestressed pipe pile foundations (1) is provided with a concrete bearing platform (3) respectively;
each steel pipe column (4) is fixed on one concrete bearing platform (3), and each row of steel pipe columns (4) are respectively fixed with one bearing beam (5);
the plurality of bailey frames (6) are bridged on the plurality of bearing beams (5) along the bridge direction, and the plurality of bailey frames (6) are transversely provided with a plurality of distributing beams (7);
the formwork (8) comprises a bottom plate and side plates, a plurality of square timbers (9) are arranged between the bottom plate and the distribution beam (7) along the bridge direction, and a side formwork support frame (10) is arranged between the side plates and the distribution beam (7);
road bed (11), road bed (11) are located the stereoplasm subaerial, it detains full hall support (12) to have built the bowl on road bed (11), the upper portion that full hall support (12) were detained to the bowl is provided with top layer board (13), top layer board (13) with be provided with a plurality of square timber (9) in the same direction as the bridge between the bottom plate of template and the curb plate.
2. A modular cast-in-place box girder construction according to claim 1, characterised in that a gravel layer (14) is laid on the road bed (11), and a concrete layer (15) is laid on the gravel layer (14).
3. A combined cast-in-place box beam support structure according to claim 1, characterized in that a first cross brace (16) is connected between every two laterally adjacent steel pipe columns (4).
4. A modular cast-in-place box beam support structure according to claim 1, characterized in that a second cross brace (17) is connected laterally between the bailey frames (6).
5. A modular cast-in-place box girder construction according to claim 1, characterized in that the bowl-lock type full hall frame (12) is provided with a floor bar (18) at the bottom and third cross braces (19) at the middle and upper part.
6. The combined cast-in-place box girder support structure according to claim 1, wherein two prestressed pipe pile foundations (1) are provided below the concrete cap (3) at both ends of each row, and three prestressed pipe pile foundations (1) are provided below the concrete caps (3) at other positions.
7. A combined cast-in-place box girder bracing structure according to claim 6, wherein the concrete cap (3) has a top reinforcement layer (301) and a bottom reinforcement layer (302), the reinforcement bars in all the top reinforcement layers (301) on the concrete cap (3) on the three prestressed pipe pile foundations (1) are distributed in a rectangular grid pattern, and the reinforcement bars in the bottom reinforcement layer (302) are distributed in a triangular overlapping staggered pattern.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023305910.0U CN214362916U (en) | 2020-12-31 | 2020-12-31 | Modular cast-in-place box girder supporting structure |
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| CN202023305910.0U CN214362916U (en) | 2020-12-31 | 2020-12-31 | Modular cast-in-place box girder supporting structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112779864A (en) * | 2020-12-31 | 2021-05-11 | 中交二公局第六工程有限公司 | Combined cast-in-place box girder support structure and construction method thereof |
| CN115198656A (en) * | 2022-07-28 | 2022-10-18 | 辽宁工程技术大学 | Construction method of large-span river bridge |
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2020
- 2020-12-31 CN CN202023305910.0U patent/CN214362916U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112779864A (en) * | 2020-12-31 | 2021-05-11 | 中交二公局第六工程有限公司 | Combined cast-in-place box girder support structure and construction method thereof |
| CN115198656A (en) * | 2022-07-28 | 2022-10-18 | 辽宁工程技术大学 | Construction method of large-span river bridge |
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