CN218466541U - Foundation pit combined crown beam structure - Google Patents
Foundation pit combined crown beam structure Download PDFInfo
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- CN218466541U CN218466541U CN202221716716.8U CN202221716716U CN218466541U CN 218466541 U CN218466541 U CN 218466541U CN 202221716716 U CN202221716716 U CN 202221716716U CN 218466541 U CN218466541 U CN 218466541U
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Abstract
A foundation pit combined crown beam structure comprises crown beams, a first inner support, a top longitudinal beam, an enclosure structure, a retaining wall, a foundation pit, a station top plate and a station side wall, wherein the crown beams 1 are correspondingly arranged along the whole lengths of the tops of the enclosure structures 5 on two sides, and a plurality of temporary crown beams 3 are arranged on the upper surface of the crown beams 1 in a stacking and interval mode and are poured with the crown beams into an integral structure; two groups of temporary crown beams 3 are correspondingly arranged in pairs on the crown beams on two sides, and a first-path inner support 4 vertical to the direction of the crown beams is connected between each group of temporary crown beams. The utility model provides an open cut foundation ditch first one support the atress problem, realized the biggest earthing thickness of the permanent atress component hat beam top in station simultaneously, for municipal pipeline lays under the road and creates the advantage, be favorable to reducing permanent structure buried depth, reduce engineering cost.
Description
Technical Field
The utility model relates to an urban rail transit underground works and underground space development engineering technical field relates to the foundation ditch structural technology field of open cut method construction, specifically is to provide a foundation ditch combination crown beam structure.
Background
At present, urban rail transit underground stations are arranged below municipal roads, open cut construction is common, when an inner support supporting system is adopted in a main foundation pit of the station, a first support 4 is generally arranged in combination with a support structure crown beam 1, and as shown in the figure 1, the crown beam is often used as a capping beam and also used as a main structure anti-floating measure. In order to guarantee the inside clearance operation requirement of station, adopt the top longeron 2 form of turning up usually in station equipment district, crown beam 1, first support 4 for avoiding the top longeron 2 that turns up, need assist and lift up, because open cut station earthing is shallower, it is difficult to satisfy the pipeline space requirement of laying under the town road to lift up back crown beam top.
The utility model aims at providing a roof beam structure is covered in foundation ditch combination to realize open cut station foundation ditch retaining structure's first way support and avoid the longeron of turning over one's top, guarantee simultaneously again that permanent anti superficial hat girder structure of holding simultaneously has certain earthing, create the condition for municipal pipeline lays.
SUMMERY OF THE UTILITY MODEL
The utility model provides a roof beam structure is covered in foundation ditch combination, its aim at solve, satisfy first one support avoid on turn over the roof girder when, make again to cover roof beam top have certain earthing to satisfy lay the technical problem that pipeline space required under the town road.
The utility model discloses the technical scheme who adopts as follows:
a foundation pit combined crown beam structure comprises a crown beam, a first inner support, a top longitudinal beam, an enclosure structure, a retaining wall, a foundation pit, a station top plate and a station side wall, and is characterized in that,
the crown beams 1 are correspondingly arranged along the whole length of the tops of the building enclosure 5 on two sides, and a plurality of temporary crown beams 3 are arranged on the upper surface of the crown beam 1 at intervals in a stacking mode and are poured with the crown beams into an integral structure; two groups of temporary crown beams 3 are correspondingly arranged in pairs on the crown beams on two sides, and a first inner support 4 vertical to the direction of the crown beams is connected between each group of temporary crown beams.
The foundation pit combined crown beam structure is characterized in that the temporary crown beam 3 is a pier block; and retaining walls 7 are arranged on the upper side edges of the temporary crown beams 3.
The foundation pit combined crown beam structure is characterized in that the pier blocks are of a cubic structure, and the enclosure structure main reinforcements 51 are bound, connected and cast with the stirrups 100 of the crown beam and the temporary crown beam into an integral structure.
The foundation pit combined crown beam structure is characterized in that an upturned top longitudinal beam 2 is arranged at the top of the inner part of a foundation pit 8 in the enclosure structure 5, and a gap is reserved between the top longitudinal beam 2 and the first inner support 4; the top longitudinal beam 2 is connected with the station top plate 81 which is lower than the crown beam, and two sides of the station top plate 81 are connected with the station side walls 82; the top longitudinal beam is arranged in parallel to the crown beam 1; a micro-expansion concrete layer 6 is arranged between the crown beam and the top plate 81 for backfilling and embedding; the temporary crown beam and the first-track inner support are positioned below the ground A.
The top beam structure is arranged above the top plate of the enclosure structure, the function of the capping beam is considered, and meanwhile, the top beam can be ensured to meet certain soil covering thickness as an underground permanent structure.
The utility model discloses a combination crown beam structure combines the back with the interim crown beam of hat, will be interim crown beam and first one support and be connected to realize open cut station foundation ditch retaining structure's first one support and avoid going up the roof beam that turns over, reduced the original height of crown beam again simultaneously, guarantee to hold concurrently and have certain earthing above the permanent anti superficial crown beam structure, lay the creation condition for municipal pipeline.
The beneficial effects of the utility model
The utility model provides an open cut foundation ditch first one support the atress problem, realized the biggest earthing thickness of the permanent atress component hat beam top in station simultaneously, for municipal pipeline lays under the road and creates the advantage, be favorable to reducing permanent structure buried depth, reduce engineering cost.
Drawings
Figure 1 is a schematic view of a conventional structure,
figure 2 is a schematic structural view of the utility model,
figure 3 is a schematic side view of figure 2,
fig. 4 is a schematic structural view of the binding rib of the present invention.
Description of the figure numbering:
the top support structure comprises a top beam 1, a top longitudinal beam 2, a temporary top beam 3, a first inner support 4, an enclosure structure 5, a main rib 51, a micro-expansion concrete layer 6, a retaining wall 7, a foundation pit 8, a station top plate 81, a station side wall 82, a stirrup 100 and a ground A.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Referring to fig. 2-4, the utility model discloses a foundation pit combination crown beam structure, which comprises a crown beam, a first inner support, a top longitudinal beam, a retaining structure, a retaining wall, a foundation pit, a station top plate and a station side wall,
the crown beams 1 are correspondingly arranged along the whole length of the tops of the building enclosure structures 5 on two sides, and a plurality of temporary crown beams 3 are arranged on the upper surfaces of the crown beams 1 in a stacking and spacing mode and are poured into an integral structure with the crown beams; two groups of temporary crown beams 3 are correspondingly arranged in pairs on the crown beams on two sides, and a first inner support 4 vertical to the direction of the crown beams is connected between each group of temporary crown beams. The temporary crown beam 3 is used for replacing the crown beam 1 to connect the first inner support 4, so that the height of the crown beam 1 is reduced, the maximum soil covering thickness above the crown beam 1 is increased, favorable conditions are created for laying of municipal pipelines under roads, the permanent structure burial depth is reduced, and the construction cost is reduced.
The foundation pit combined crown beam structure is characterized in that the temporary crown beam 3 is a pier block; referring to fig. 3, the temporary crown beam 3 is provided with retaining walls 7 on its upper side.
The foundation pit combined crown beam structure is characterized in that pier blocks are of a cubic structure, as shown in fig. 4, and the enclosure structure main reinforcements 51 are bound, connected and poured into an integral structure with the crown beams and the stirrups 100 of the temporary crown beams.
Referring to fig. 1, in the foundation pit combined crown beam structure, an upturned top longitudinal beam 2 is arranged at the top of the inner part of a foundation pit 8 in a building enclosure 5, and a gap is reserved between the top longitudinal beam 2 and a first inner support 4; the top longitudinal beam 2 is connected with the station top plate 81 which is lower than the crown beam, and two sides of the station top plate 81 are connected with the station side walls 82; the top longitudinal beam is arranged in parallel to the crown beam 1; a micro-expansion concrete layer 6 is arranged between the crown beam and the top plate 81 for backfilling and embedding; the temporary crown beam and the first-track inner support are positioned below the ground A.
Examples
Referring to fig. 2-4, in implementation, the building enclosure 5 is firstly constructed, then the crown beam 1, the temporary crown beam 3, the retaining wall 7 and the first inner support 4 are sequentially constructed, after the foundation pit 8 is excavated, the station structure is sequentially constructed to the station top plate 81 and the top longitudinal beam 2, a micro-expansion concrete layer 6 is filled between the station top plate 81 and the crown beam 1, finally, earth is backfilled, and the first inner support 4, the temporary crown beam 3 and the retaining wall 7 are removed. The open cut station foundation pit support structure can be supported for the first time to avoid an upturned roof girder, and meanwhile, certain earthing is guaranteed to exist in the structure which is also used as the permanent anti-floating crown beam 1, so that conditions are created for municipal pipeline laying.
Claims (4)
1. A foundation pit combined crown beam structure comprises a crown beam, a first inner support, a top longitudinal beam, an enclosure structure, a retaining wall, a foundation pit, a station top plate and a station side wall, and is characterized in that,
the crown beams (1) are correspondingly arranged along the whole length of the tops of the building enclosure structures (5) on two sides, and a plurality of temporary crown beams (3) are arranged on the upper surface of the crown beam (1) in a stacking and interval mode and cast with the crown beams into an integral structure; the temporary crown beams (3) are correspondingly arranged in pairs on two groups of the crown beams on two sides, and a first-path inner support (4) vertical to the direction of the crown beams is connected between each group of the temporary crown beams.
2. A foundation pit assembled crown beam structure according to claim 1, characterized in that the temporary crown beam (3) is a pier block; and the side edge of the upper surface of the temporary crown beam (3) is provided with a retaining wall (7).
3. A foundation pit combined crown beam structure according to claim 2, characterized in that the pier blocks are of a cubic structure, and the enclosure main reinforcement (51) is bound, connected and cast with the stirrups (100) of the crown beam and the temporary crown beam into an integral structure.
4. A foundation pit assembled crown beam structure according to claim 1, characterized in that an upturned top longitudinal beam (2) is arranged at the top of the inner part of the foundation pit (8) in the enclosure structure (5), and a gap is reserved between the top longitudinal beam (2) and the first inner support (4); the top longitudinal beam (2) is connected with the station top plate (81) lower than the crown beam, and two sides of the station top plate (81) are connected with the station side walls (82); the top longitudinal beam is arranged in parallel to the crown beam (1); a micro-expansion concrete layer (6) is arranged between the crown beam and the top plate (81) for backfilling and embedding; the temporary crown beam and the first-track inner support are positioned below the ground (A).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221716716.8U CN218466541U (en) | 2022-07-05 | 2022-07-05 | Foundation pit combined crown beam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221716716.8U CN218466541U (en) | 2022-07-05 | 2022-07-05 | Foundation pit combined crown beam structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218466541U true CN218466541U (en) | 2023-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221716716.8U Active CN218466541U (en) | 2022-07-05 | 2022-07-05 | Foundation pit combined crown beam structure |
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| CN (1) | CN218466541U (en) |
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2022
- 2022-07-05 CN CN202221716716.8U patent/CN218466541U/en active Active
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