CN212508328U - Reinforcing structure for entrance section of bias tunnel - Google Patents
Reinforcing structure for entrance section of bias tunnel Download PDFInfo
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- CN212508328U CN212508328U CN202021204508.0U CN202021204508U CN212508328U CN 212508328 U CN212508328 U CN 212508328U CN 202021204508 U CN202021204508 U CN 202021204508U CN 212508328 U CN212508328 U CN 212508328U
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Abstract
The utility model provides a reinforcement structure for a bias tunnel portal section, wherein one side of a tunnel lining is a high pressure-bearing side, the other side of the tunnel lining is a low pressure-bearing side, reinforcing piles are arranged in a foundation of the low pressure-bearing side of the tunnel lining, and a concrete poured foundation reinforcement body is arranged between the reinforcing piles and the tunnel lining; a concrete bearing platform is arranged on the outer side of the tunnel lining, and the concrete bearing platform is respectively connected with the foundation reinforcing body and the high pressure-bearing side rock mass; and a lateral bearing column is arranged between the tunnel lining and the high-bearing-side rock mass. The utility model discloses set up the reinforcing pile in the ground of low pressure-bearing side to combining reinforcing pile, ground reinforcement body, concrete cushion cap as an organic whole, resisting the pressure of high pressure-bearing side, simultaneously, through the side direction bearing post, reduced the direct pressure of high pressure-bearing side to tunnel lining, avoid tunnel lining to receive the bias pressure influence, eliminated the potential safety hazard. Meanwhile, the underground water drainage pipe is arranged, so that the influence of underground water is eliminated, and the durability of the tunnel is improved.
Description
Technical Field
The utility model relates to a bias voltage tunnel consolidates the field, especially relates to a bias voltage tunnel entrance to a cave section reinforced structure.
Background
Limited by the diversity of geological conditions, tunnel construction is often faced with a situation of lateral bias. In particular, in the tunnel portal section structure, one side of the tunnel has higher rock mass, and the other side of the tunnel has little or no rock mass, so that one side of the tunnel bears higher pressure, and the other side of the tunnel is nearly in an empty state. Such biasing conditions may cause potential risks during the tunnel construction and operation stages, resulting in shear displacement deformation and even destruction of the tunnel portal section.
SUMMERY OF THE UTILITY MODEL
The utility model provides a biasing tunnel entrance to a cave section reinforced structure to solve above-mentioned problem.
A kind of bias tunnel entrance to a cave section reinforced structure, tunnel lining one side is the high pressure-bearing side, another side is the low pressure-bearing side, there are reinforcing piles in the foundation of the low pressure-bearing side of the said tunnel lining, there are foundation reinforcement bodies of concrete placement between said reinforcing pile and said tunnel lining;
a concrete bearing platform is arranged on the outer side of the tunnel lining, and the concrete bearing platform is respectively connected with the foundation reinforcing body and the high pressure-bearing side rock mass;
and a lateral bearing column is arranged between the tunnel lining and the high-bearing-side rock mass.
Furthermore, the lateral bearing column is a reinforced concrete column, and the lateral bearing column inclines to the high bearing side.
Further, a reinforced concrete slab is arranged on the top of the concrete bearing platform, and a waterproof layer is arranged on the surface of the reinforced concrete slab.
Furthermore, the joint of the concrete bearing platform and the rock mass on the high pressure bearing side is in a step shape, and one surface of the concrete bearing platform, which is close to the low pressure bearing side, inclines towards the high pressure bearing side.
Furthermore, the concrete cushion cap with the junction of ground reinforcement body is equipped with the body of building, build the body with be equipped with the steel bar pile between the ground reinforcement body.
Furthermore, the drainage system also comprises a drainage pipe and a drainage blind ditch arranged in the rock stratum, wherein one end of the drainage pipe is connected with the drainage blind ditch, and the other end of the drainage pipe is arranged in the rock mass around the tunnel lining.
The utility model provides a pair of biasing tunnel entrance to a cave section reinforced structure sets up the reinforcing pile in the ground of low pressure-bearing side to as an organic whole will reinforce pile, ground reinforcing body, concrete cushion cap, resist the pressure of high pressure-bearing side, simultaneously, through the side direction bearing post, reduced high pressure-bearing side to tunnel lining's direct pressure, avoid tunnel lining to receive the bias voltage influence, eliminated the potential safety hazard. Meanwhile, the underground water drainage pipe is arranged, so that the influence of underground water is eliminated, and the durability of the tunnel is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a reinforcement structure for an entrance section of a bias tunnel according to an embodiment of the present invention;
fig. 2 is a partial enlarged view of a reinforcement structure of a biased tunnel portal section according to an embodiment of the present invention.
In the figure: 1. a rock formation; 2. a drainage blind ditch; 3. reinforcing steel bar piles; 4. building a building body; 5. reinforcing piles; 6. a concrete cap; 7. a waterproof layer; 8. a reinforced concrete slab; 9. a drain pipe; 10. lining the tunnel; 11. a lateral pressure bearing column; 12. high pressure side rock mass; 13. and (5) reinforcing the foundation with a solid.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-2, in a reinforcement structure for an opening section of a bias tunnel, one side of a tunnel lining 10 is a high pressure side, the other side is a low pressure side, reinforcing piles 5 are arranged in a foundation on the low pressure side of the tunnel lining 10, and a concrete poured foundation reinforcement 13 is arranged between the reinforcing piles 5 and the tunnel lining 10;
a concrete bearing platform 6 is arranged on the outer side of the tunnel lining 10, and the concrete bearing platform 6 is respectively connected with a foundation reinforcing body 13 and a high pressure-bearing side rock body 12;
the concrete bearing platform 6, the foundation reinforcing body 13 and the reinforcing piles 5 are combined together to resist the pressure of the high pressure-bearing side rock mass 12, so that the pressure is prevented from acting on the tunnel lining, and further the tunnel is prevented from deforming.
A lateral bearing column 11 is arranged between the tunnel lining 10 and the high bearing side rock mass 12. The lateral bearing pillars 11 prevent the high bearing side rock mass from directly acting pressure on the tunnel lining.
The lateral bearing column 11 is a reinforced concrete column, and the lateral bearing column 11 inclines to the high bearing side. The included angle between the axis of the lateral bearing column 11 and the horizontal plane is 75 degrees, so that the lateral pressure can be well borne.
The top of the concrete bearing platform 6 is provided with a reinforced concrete slab 8, and the surface of the reinforced concrete slab 8 is provided with a waterproof layer 7. The reinforced concrete slab 8 prevents broken stones on the surface of a rock body from falling down to damage the concrete bearing platform 6, and the waterproof layer 7 is SBS waterproof coiled material and is coated with modified asphalt waterproof coating to play a waterproof role.
The joint of the concrete bearing platform 6 and the rock mass 12 on the high pressure-bearing side is in a step shape, the joint surface of the step shape can enable the concrete bearing platform 6 and the rock mass 12 on the high pressure-bearing side to be stably occluded, one surface of the concrete bearing platform 6, which is close to the low pressure-bearing side, inclines to the high pressure-bearing side, and the included angle between the surface and the horizontal plane is 75 degrees, so that the lateral pressure can be better borne.
Furthermore, a masonry body 4 is arranged at the joint of the concrete bearing platform 6 and the foundation reinforcement body 13, and a steel bar pile 3 is arranged between the masonry body 4 and the foundation reinforcement body 13. The junction of concrete cushion cap 6 and ground reinforcement 13 is stress concentration department, increases the masonry 4 and sets up the steel bar pile 3, can avoid here stress concentration, and then avoids causing the connection unstability of concrete cushion cap 6 and ground reinforcement 13.
Further, still include drain pipe 9 and locate the drainage french drain 2 in the stratum 1, drain pipe 9 one end links to each other with drainage french drain 2, and the other end is located in the rock mass around tunnel lining 10, avoids groundwater to the influence of tunnel lining, improves the durability of structure.
The concrete construction process of the embodiment is as follows:
1. and (3) cleaning rock and soil mass in the pre-construction area to reserve a space for constructing the foundation reinforcing body 13.
2. And drilling downwards, placing a prefabricated reinforcement cage, and pouring concrete to form the reinforcing pile 5. The lower part of the reinforcing pile 5 is embedded into the rock stratum 1 for at least 3m, and the exposed part of the upper part is reserved for about 0.5 m.
3. And digging and building a drainage blind ditch 2.
4. And (3) installing a template, pouring concrete to form a foundation reinforcing body 13, embedding the drain pipe 9 in the process, connecting the left side of the drain blind ditch 2 to the left side of the drain blind ditch, and reserving a drain pipe joint at a position close to the tunnel.
5. Drilling and setting lateral support columns 11: and (4) drilling holes obliquely downwards, placing a prefabricated reinforcement cage and pouring concrete to form the lateral support column 11.
6. And constructing the tunnel lining 10 and the concrete bearing platform 6. The two are conventional construction structures of the tunnel, and the specific construction method is not described herein again. And (3) in the process of constructing the tunnel lining 10, pre-burying the tunnel part of the drain pipe 9 and connecting the tunnel part with the joint reserved in the step (4).
7. And (4) constructing a masonry body, obliquely and downwards nailing the steel bar piles 3 into the foundation reinforcement body 13 when the bottom of the masonry body is about 20cm, and then continuously constructing the masonry body 4 until the construction is completed.
8. And adding a reinforced concrete slab 8 to the concrete bearing platform 6 and applying a waterproof layer 7.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (6)
1. A bias tunnel entrance to a cave section reinforced structure, tunnel lining (10) one side is the high pressure-bearing side, the other side is the low pressure-bearing side, characterized by that, be equipped with the reinforced pile (5) in the foundation of the low pressure-bearing side of said tunnel lining (10), be equipped with the foundation reinforcement body (13) that the concrete pours between said reinforced pile (5) and said tunnel lining (10);
a concrete bearing platform (6) is arranged on the outer side of the tunnel lining (10), and the concrete bearing platform (6) is respectively connected with the foundation reinforcement body (13) and the high pressure-bearing side rock mass (12);
and a lateral bearing column (11) is arranged between the tunnel lining (10) and the high-bearing-pressure side rock mass (12).
2. A biased tunnel portal section reinforcement structure according to claim 1, characterized in that said lateral bearing columns (11) are reinforced concrete columns, said lateral bearing columns (11) being inclined to said high bearing side.
3. A biased tunnel portal section reinforcement structure according to claim 1, characterized in that a reinforced concrete slab (8) is provided on top of the concrete cap (6), and a waterproof layer (7) is provided on the surface of the reinforced concrete slab (8).
4. A biased tunnel portal section reinforcing structure according to claim 1, characterized in that the junction of the concrete bearing platform (6) and the rock mass (12) on the high pressure side is stepped, and the surface of the concrete bearing platform (6) close to the low pressure side is inclined to the high pressure side.
5. A biased tunnel portal section reinforcement structure according to claim 1, characterized in that a masonry (4) is provided at the junction of the concrete cap (6) and the foundation reinforcement (13), and a steel bar pile (3) is provided between the masonry (4) and the foundation reinforcement (13).
6. A biased tunnel portal section reinforcement structure according to claim 1, characterized by further comprising a drain pipe (9) and a drain blind ditch (2) arranged in the rock formation (1), wherein one end of the drain pipe (9) is connected with the drain blind ditch (2) and the other end is arranged in the rock formation around the tunnel lining (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021204508.0U CN212508328U (en) | 2020-06-24 | 2020-06-24 | Reinforcing structure for entrance section of bias tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021204508.0U CN212508328U (en) | 2020-06-24 | 2020-06-24 | Reinforcing structure for entrance section of bias tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212508328U true CN212508328U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021204508.0U Active CN212508328U (en) | 2020-06-24 | 2020-06-24 | Reinforcing structure for entrance section of bias tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212508328U (en) |
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2020
- 2020-06-24 CN CN202021204508.0U patent/CN212508328U/en active Active
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