CN209780906U - Tunnel hole-entering structure - Google Patents
Tunnel hole-entering structure Download PDFInfo
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- CN209780906U CN209780906U CN201920450941.3U CN201920450941U CN209780906U CN 209780906 U CN209780906 U CN 209780906U CN 201920450941 U CN201920450941 U CN 201920450941U CN 209780906 U CN209780906 U CN 209780906U
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Abstract
The utility model discloses a tunnel hole-entering structure, wherein a cast-in-place pile is a structure of a cast-in-place concrete pile for manual hole digging or drilling and is positioned at two sides of a tunnel at a position where a hole is to be dug in the dark; constructing a crown beam on the tops of the cast-in-place piles arranged at two sides and between the tops of the cast-in-place piles at two sides; a grid steel frame mesh-sprayed concrete support is adopted under the crown beam; and arranging an advanced pipe shed or small conduit grouting or anchor rods on the upper edge of the upper step of the tunnel. The utility model discloses can reduce excavation earth and stone side and protection work load, reduce and backfill, reduce to take up an area of, reduce to ecological environment destruction, be favorable to the slope to be stable, have the soil conservation with the environment to maintain, it is better to establish the view effect, and the construction tissue is simple, convenient.
Description
Technical Field
The utility model relates to a tunnel advances structure in hole.
Background
The entering of the hole is the key and difficult point of the design and construction of the tunnel. The method is characterized in that slope excavation is generally adopted, a leading pipe shed is constructed at a certain buried depth, a hole is dug in a hidden mode, then an open cut is formed, and the slope is backfilled and greened. The construction method has the advantages of large earth and stone excavation amount and temporary slope protection engineering amount, large occupied area, more damage to landform and landform, no contribution to slope stability, no contribution to water and soil conservation and ecological environment maintenance, and high construction cost.
the patent retrieval finds that the Chinese electric construction group Guiyang survey design research institute Limited company Lishiwei has a 'tunnel structure of entering the hole' (grant No. 206942777) utility model patent, mentions a tunnel structure of entering the hole, which is characterized in that: through setting up the barricade at entrance to a cave side slope to construct one section open cut tunnel before advancing the hole, form holistic retaining structure, satisfy the tunnel and advance the needs of hole construction safety.
The invention discloses a method and a process for entering a hole, which is characterized in that the method comprises the following steps: the operable programmed tunnel zero-excavation hole-entering construction method is provided, the tunnel portal is effectively combined with the natural environment, and the ecological damage of the portal is reduced.
The utility model discloses a barricade and open cut tunnel formation holistic fender structure are built at the entrance to a cave to utility model patent of "a tunnel advances hole structure", are unfavorable for the subsurface excavated construction and the construction tissue, are not suitable for the large-span section.
The invention patent of 'a tunnel zero-excavation hole-entering construction method and a tunnel zero-excavation hole-entering construction process' mainly provides a tunnel hole-entering programmed process and a tunnel hole-entering programmed method, and the method adopts the traditional casing and pipe shed hole-entering construction.
Disclosure of Invention
The utility model provides a tunnel cave-in structure, which can solve the problems of large excavation amount of open cut construction earth and stone and temporary slope protection engineering amount, large occupied area and large damage to ecological environment; but also can solve the technical problems of stable slope body, water and soil conservation, construction and construction organization favorable for underground excavation of tunnel entry, and the like.
In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:
A tunnel hole-entering structure is characterized in that cast-in-place piles are of a manual hole-digging or drilling cast-in-place concrete pile structure and are positioned on two sides of a tunnel at a position where a hole is to be dug in a subsurface; constructing a crown beam on the tops of the cast-in-place piles arranged at two sides and between the tops of the cast-in-place piles at two sides; a grid steel frame mesh-sprayed concrete support is adopted under the crown beam; and arranging an advanced pipe shed or small conduit grouting or anchor rods on the upper edge of the upper step of the tunnel.
The cast-in-place piles on the two sides are arranged on the same plane.
The utility model discloses an advantage and positive effect as follows:
The construction method has the advantages of reducing excavation earth and stone, protecting workload, reducing backfilling, reducing occupied area, reducing damage to ecological environment, being beneficial to stabilizing side slopes, being beneficial to soil conservation and environmental maintenance, having better landscape construction effect and simple and convenient construction organization.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Numbering in the figures: 1. digging holes or drilling cast-in-place piles; 2. a crown beam; 3. spraying concrete on the grid steel frame; 4. leading a pipe shed or a small conduit for grouting or bolting; 5. excavating and supporting an upper step; 6. and (5) excavating and supporting the lower step.
Detailed Description
The utility model discloses a structure is seen in figure 1, a structure that hole was advanced in tunnel, bored concrete pile are for manual hole digging or drilling cast-in-place concrete pile structure, are located to plan to secretly dig into the both sides in hole department tunnel, can become certain angular alignment mutually, as shown in figure 1, also can arrange at the coplanar mutually, and embodiment drawing has been omitted to this mode. Constructing a crown beam on the tops of the cast-in-place piles arranged at two sides and between the tops of the cast-in-place piles at two sides; a grid steel frame mesh-sprayed concrete support is adopted under the crown beam; and arranging an advanced pipe shed or small conduit grouting or anchor rods on the upper edge of the upper step of the tunnel.
The utility model provides a tunnel advances hole structure and construction method: the support structure of the tunnel entrance is formed by cast-in-place piles, crown beams and grid steel frame mesh-sprayed concrete; constructing an advanced pipe shed or small conduit grouting or an anchor rod along an excavation line to serve as an advanced support for underground excavation, so that effective auxiliary measures are provided for the underground excavation; and (5) carrying out step-by-step hole entering construction.
The utility model provides a tunnel advances construction step of hole structure: firstly, manually digging or drilling holes to pour concrete piles 1; constructing a crown beam 2; excavating and erecting grid steel frame mesh-sprayed concrete supports 3 from top to bottom in a layered manner; constructing an advanced pipe shed or small conduit grouting or anchor rod 4; excavating and supporting 5 on the upper step of the tunnel; and excavating and supporting 6 on the lower step.
Claims (2)
1. A tunnel cave-in structure is characterized in that a cast-in-place pile is a structure of a manual hole digging or drilling cast-in-place concrete pile and is positioned on two sides of a tunnel to be dug into the cave under dark; constructing a crown beam on the tops of the cast-in-place piles arranged at two sides and between the tops of the cast-in-place piles at two sides; a grid steel frame mesh-sprayed concrete support is adopted under the crown beam; and arranging an advanced pipe shed or an advanced small conduit grouting or an advanced anchor rod support at the upper edge of the upper step of the tunnel.
2. a tunnel boring structure according to claim 1, wherein the cast-in-place piles are arranged on both sides in the same plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450941.3U CN209780906U (en) | 2019-04-03 | 2019-04-03 | Tunnel hole-entering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450941.3U CN209780906U (en) | 2019-04-03 | 2019-04-03 | Tunnel hole-entering structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209780906U true CN209780906U (en) | 2019-12-13 |
Family
ID=68801188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920450941.3U Active CN209780906U (en) | 2019-04-03 | 2019-04-03 | Tunnel hole-entering structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN209780906U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869163A (en) * | 2019-04-03 | 2019-06-11 | 北京市市政工程设计研究总院有限公司 | A kind of construction method and structure of tunnel |
-
2019
- 2019-04-03 CN CN201920450941.3U patent/CN209780906U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869163A (en) * | 2019-04-03 | 2019-06-11 | 北京市市政工程设计研究总院有限公司 | A kind of construction method and structure of tunnel |
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