CN210049909U - Highway tunnel section steel concrete supporting construction - Google Patents
Highway tunnel section steel concrete supporting construction Download PDFInfo
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- CN210049909U CN210049909U CN201920652627.3U CN201920652627U CN210049909U CN 210049909 U CN210049909 U CN 210049909U CN 201920652627 U CN201920652627 U CN 201920652627U CN 210049909 U CN210049909 U CN 210049909U
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Abstract
The utility model relates to a highway tunnel section steel concrete supporting construction, its characterized in that: the tunnel lining structure supports surrounding rocks by erecting a profile steel arch, a layer of reinforcing mesh is hung on the surface of the surrounding rocks, a layer of reinforcing mesh is arranged outside the profile steel arch, two layers of reinforcing meshes are connected by adopting connecting reinforcing bars, and then the steel arch and the reinforcing mesh are compactly poured by adopting sprayed concrete. By adopting the road tunnel type steel reinforced concrete supporting structure, the stress requirement of the tunnel structure is met, and the excavation engineering quantity in the tunnel is reduced. The rigidity of the tunnel supporting structure is greatly improved, the problem that soil surrounding rocks and weak surrounding rocks are easy to deform is effectively solved, the durability and the shock resistance of the structure are improved, and the tunnel supporting structure is simple in structure, strong in operability, low in cost and simple and convenient to install.
Description
One, the technical field
The utility model relates to a highway tunnel section steel concrete supporting construction.
Second, background Art
The supporting structure of the road tunnel is usually designed and constructed by adopting a composite lining according to the 'new Austrian' principle. The rigidity of the primary support is particularly important for the soil surrounding rock or the weak surrounding rock section. A steel reinforced concrete structure is formed by adopting a combined primary support mode of a profile steel arch (or a grid arch) and an anchor spraying net.
The profile steel arch is an indispensable supporting structure in the construction of highway tunnels, is a stronger one in the preliminary bracing of tunnels, and is mainly suitable for tunnels of surrounding rocks such as soil texture, soft rock, rock joint development and fault fracture zone.
Due to the characteristics of complexity, concealment and the like of rock strata around the tunnel, the tunnel needs to be supported by using a steel arch frame, so that the stability of the tunnel is ensured. However, the section of the road tunnel is large, and the steel arch has the characteristic of easy distortion, so that a stable shell structure cannot be formed. Therefore, the design concept of the steel reinforced concrete is introduced into the design of the tunnel structure, and the structural rigidity can be effectively improved. The steel reinforced concrete is a combined high-strength structure, and is widely developed and applied abroad. Under the influence of the development of the building industry, the application of the section steel concrete in the highway industry in China is gradually common, the section steel concrete is different from the traditional steel structure, has stronger bearing capacity and earthquake-resistant performance, and can also save steel.
The section steel in the section steel concrete is not limited by the steel content, and the bearing capacity of the section steel concrete member can be more than one time higher than that of a reinforced concrete member with the same appearance, so that the invasion of a tunnel supporting structure to a tunnel excavation space can be reduced, the tunnel excavation amount is further reduced, and the economic benefit is great. The steel reinforced concrete forms a steel structure before concrete pouring, has large bearing capacity, can bear the self weight of a member and certain surrounding rock load, is favorable for safe construction, and accelerates the construction speed. The ductility of the steel reinforced concrete composite structure is obviously improved compared with that of a reinforced concrete structure, and particularly, the solid-web type steel has good seismic performance. Compared with a steel structure, the structural steel concrete platform structure has better durability, fire resistance and the like. The concrete shell and the steel structure bear force together, and the steel can be saved by 50% or more in the steel reinforced concrete structure compared with the steel structure.
Therefore, the rigidity of the section steel concrete structure is obviously improved compared with that of a common concrete member. The section steel concrete has good ductility and great energy consumption capability, and can well implement the design concept of the 'New Olympic method'.
The steel consumption of the road tunnel type steel concrete supporting structure is reduced, the construction cost is greatly reduced, the structure can exert the rigidity as early as possible, the whole stress of the structure is favorably exerted, the durability and the shock resistance of the structure are improved, and the engineering quality is further improved.
Third, the invention
The utility model aims to solve the technical problem that it is not enough to current technique, provide a highway tunnel shaped steel concrete supporting construction to reduce the construction degree of difficulty, cost, reduce the operating cost, improve engineering quality simultaneously.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
the utility model provides a highway tunnel type steel concrete supporting construction which characterized in that: the tunnel lining structure supports surrounding rocks by erecting a profile steel arch, a layer of reinforcing mesh is hung on the surface of the surrounding rocks, a layer of reinforcing mesh is arranged outside the profile steel arch, two layers of reinforcing meshes are connected by adopting connecting reinforcing bars, and then the steel arch and the reinforcing mesh are compactly poured by adopting sprayed concrete.
By adopting the highway tunnel type steel reinforced concrete supporting structure, the stress requirement of the tunnel structure is met, the excavation engineering amount in a tunnel hole is reduced, the rigidity of the tunnel supporting structure is greatly improved, the problem that soil surrounding rocks and weak surrounding rocks are easy to deform is effectively solved, the durability and the shock resistance of the structure are improved, and the highway tunnel type steel reinforced concrete supporting structure is simple in structure, strong in operability, lower in cost and simple and convenient to install.
Description of the drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of the present invention;
in the figure: the steel arch comprises a profile steel arch frame 1, a first layer of reinforcing mesh 2, a second layer of reinforcing mesh 3, connecting reinforcing steel bars 4 and sprayed concrete 5.
Fifth, detailed description of the invention
Referring to the attached drawings, a road tunnel type steel reinforced concrete supporting structure is characterized in that: tunnel lining structure is strutted the country rock through setting up shaped steel bow member (1), hangs on the country rock surface and establishes first layer reinforcing bar net (2), and shaped steel bow member (1) outside sets up second floor reinforcing bar net (3), adopts connecting reinforcement (4) to connect between first layer reinforcing bar net (2) and second floor reinforcing bar net (3), then adopts spray concrete (5) to pour closely between shaped steel bow member (1) and reinforcing bar net (2) (3).
The working principle is as follows: the section steel, the reinforcing mesh, the connecting ribs and the concrete form a section steel concrete structure to form a tunnel lining structure, so that the quick supporting effect of the supporting structure is realized, and an effective supporting structure form is provided for soil and soft rock tunnels.
Claims (1)
1. The utility model provides a highway tunnel type steel concrete supporting construction which characterized in that: tunnel lining structure is strutted the country rock through setting up shaped steel bow member (1), hangs on the country rock surface and establishes first layer reinforcing bar net (2), and shaped steel bow member (1) outside sets up second floor reinforcing bar net (3), adopts connecting reinforcement (4) to connect between first layer reinforcing bar net (2) and second floor reinforcing bar net (3), then adopts spray concrete (5) to pour closely between shaped steel bow member (1) and reinforcing bar net (2, 3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920652627.3U CN210049909U (en) | 2019-05-08 | 2019-05-08 | Highway tunnel section steel concrete supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920652627.3U CN210049909U (en) | 2019-05-08 | 2019-05-08 | Highway tunnel section steel concrete supporting construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210049909U true CN210049909U (en) | 2020-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920652627.3U Active CN210049909U (en) | 2019-05-08 | 2019-05-08 | Highway tunnel section steel concrete supporting construction |
Country Status (1)
| Country | Link |
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| CN (1) | CN210049909U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339005A (en) * | 2021-06-07 | 2021-09-03 | 中铁工程装备集团有限公司 | Tunnel primary support spraying and mixing structure and horizontal construction method thereof |
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2019
- 2019-05-08 CN CN201920652627.3U patent/CN210049909U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339005A (en) * | 2021-06-07 | 2021-09-03 | 中铁工程装备集团有限公司 | Tunnel primary support spraying and mixing structure and horizontal construction method thereof |
| CN113339005B (en) * | 2021-06-07 | 2022-03-15 | 中铁工程装备集团有限公司 | Tunnel primary support spraying and mixing structure and horizontal construction method thereof |
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