CN219825359U - Buried protective structure for avalanche road section - Google Patents
Buried protective structure for avalanche road section Download PDFInfo
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- CN219825359U CN219825359U CN202320660509.3U CN202320660509U CN219825359U CN 219825359 U CN219825359 U CN 219825359U CN 202320660509 U CN202320660509 U CN 202320660509U CN 219825359 U CN219825359 U CN 219825359U
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- 230000001681 protective effect Effects 0.000 title claims description 19
- 239000002689 soil Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000003139 buffering effect Effects 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims description 57
- 239000010410 layer Substances 0.000 claims description 52
- 239000002344 surface layer Substances 0.000 claims description 23
- 238000005266 casting Methods 0.000 claims description 2
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- 238000013508 migration Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000012876 topography Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
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- 238000012546 transfer Methods 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 210000004681 ovum Anatomy 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Abstract
The utility model belongs to the technical field of highway traffic and water conservancy and hydropower engineering, and particularly discloses an avalanche road section buried type protection structure which comprises a foundation pit, wherein a hole body is poured in the foundation pit, a roadbed is arranged at the bottom of the hole body, a cover plate is arranged above the hole body, backfill soil is filled in a gap between the hole body and the foundation pit, and a flexible cushion layer for buffering vertical impact kinetic energy of avalanche is arranged above the cover plate. The utility model can reduce the impact kinetic energy of the avalanche, solve the road traffic problem of the avalanche road section and improve the safety.
Description
Technical Field
The utility model relates to the technical field of highway traffic, water conservancy and hydropower engineering, in particular to an underground protection structure for an avalanche road section.
Background
The Qinghai-Tibet plateau in China, especially glaciers in southeast of Tibetan, has widely spread ice and snow, a large amount of snow is accumulated on Gao Douan slopes, and avalanche is extremely easy to occur during warming in spring climate, so that huge loss of lives and properties is caused. In traffic engineering, a bedrock tunnel is adopted to bypass or protect a ground shed tunnel structure for an avalanche road section, and the bedrock tunnel has higher safety, but long construction period and high manufacturing cost; the ground shed tunnel structure is convenient to construct, the construction cost is reduced to a certain extent compared with a bedrock tunnel, a certain protection structure is arranged on a small-scale avalanche, but the whole structure is arranged above the ground, the impact of large-scale avalanche is difficult to resist, the integral instability or damage of the structure is easy to occur, and the safety is low.
Disclosure of Invention
The utility model provides an underground protection structure for an avalanche road section, which aims to reduce the direct impact of the avalanche on a road, solve the road passing problem of the avalanche road section and improve the safety.
The utility model is realized by the following technical scheme: the utility model provides an avalanche highway section buries formula protective structure, includes the foundation ditch, pour the hole body in the foundation ditch, the bottom of the hole body is equipped with the road bed, hole body top is equipped with the apron, and the space between hole body and the foundation ditch is filled with backfill, the apron top is equipped with the flexible bed course that is used for buffering the vertical impact kinetic energy of avalanche.
Compared with the prior art, the utility model has the following advantages and beneficial effects: the hole body is located the foundation ditch in this technical scheme, and the road bed is located the hole internally to make the road place in below ground, the hole body structure of lower part can satisfy underground traffic tunnel function demand, and compare at ground construction shed tunnel among the prior art, this technical scheme can more effectually avoid the avalanche to the direct impact of road, the impact kinetic energy of effectual reduction avalanche solves the current problem of avalanche highway section road, improves the security.
In addition, the cover plate arranged in the scheme can bear partial load and transfer the load to the lower foundation, and can transfer additional load generated by avalanche and most of impact kinetic energy to the foundation for bearing.
In this scheme, fill through backfill between cavity and the foundation ditch, make the overall and foundation formation of protective structure in this scheme integrative, share a part upper portion load simultaneously, and set up the purpose of apron structure in this scheme and mainly bear the avalanche impact load that the apron transmitted down, the static load when avalanche is piled up and is stopped and the structure dead weight load that coats.
The flexible cushion layer can buffer the vertical impact kinetic energy of avalanche, the impact kinetic energy of avalanche to the structure is reduced to the maximization of this scheme, can effectively ensure strong avalanche and develop the safe traffic problem in highway section, and all be ground construction, the construction is convenient, can multi-section simultaneous construction, improves greatly for conventional bedrock tunnel efficiency of construction, and cost is lower.
Further, a concrete cover layer formed by concrete pouring is arranged on the top of the flexible cushion layer.
The beneficial effects are that: the concrete cap in this solution has the main function of protecting the flexible backing layer from degradation during avalanche migration.
Further, a concrete surface layer is smeared on the surface of the concrete cover layer, and the concrete surface layer is smoothly connected with the original ground.
The beneficial effects are that: a layer of concrete surface layer is formed on the surface of the concrete cover layer by adopting an anti-impact and wear-resistant concrete plastering, so that the degradation of the concrete cover layer in the avalanche movement process is prevented, meanwhile, the surface roughness is reduced, and the friction resistance between the avalanche and a lower structure in the movement process is reduced.
Further, tooth walls are connected to two sides of the concrete surface layer, and the surfaces of the tooth walls are flush with the concrete surface layer.
The beneficial effects are that: so set up, the tooth wall can ensure the stability of concrete surface course, prevents to pass the in-process at the avalanche, and the concrete surface course is driven.
Further, a buffer layer is arranged between the concrete surface layer and the bedrock, and the buffer layer is formed by block stone concrete.
The beneficial effects are that: the buffer layer that this scheme set up can change avalanche migration orbit, reduces the vertical impact kinetic energy of avalanche to whole protective structure system.
Further, the surface of the buffer layer is arc-shaped and is smoothly connected with the concrete surface layer.
The beneficial effects are that: the buffer layer in this scheme adopts the arc form, can play topography gradient gradual change effect, is convenient for change the impact direction of avalanche, reduces the vertical impact kinetic energy of avalanche.
Further, rib plates are arranged in the cover plate.
The beneficial effects are that: the strength of the cover plate can be enhanced, and the resistance strength to vertical impact generated when the boulder is wrapped and clamped in the avalanche process is enhanced.
Further, the bottom of the hole body is provided with a roadbed, drainage ditches are arranged on two sides of the roadbed, drainage pipes are arranged on two sides of the hole body, and the drainage pipes drain water towards the drainage ditches.
The beneficial effects are that: the drain pipe is used for dredging and draining underground water in the soil body, and the drain ditch is used for receiving the underground water drained by the drain pipe of the hole body.
Further, a backfill layer is arranged between the bottom of the foundation pit and the bottom of the hole body.
The beneficial effects are that: the arrangement of the backfill layer can reduce the problem of stress concentration caused to the upper rigid structure due to non-uniformity of the soil mass of the foundation at the lower part, so that the hole body structure is firmer.
Further, the backfill soil backfill height exceeds the top of the cavity.
The beneficial effects are that: the arrangement can prevent the hole body from being in direct rigid contact with the concrete cover plate, so that the load can be borne by the foundation as much as possible, and the stress of the hole body is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of the present utility model.
In the drawings, the reference numerals and corresponding part names:
foundation pit 1, backfill layer 2, hole body 3, road surface 4, drain pipe 5, escape canal 6, backfill 7, apron 8, flexible bed course 9, concrete cover 10, concrete surface layer 11, tooth wall 12, buffer layer 13.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.
Embodiment as shown in fig. 1, embodiment 1 provides an avalanche road section buried protection structure, which comprises a foundation pit 1, wherein the foundation pit 1 is formed by open excavation of a ground natural covering layer, and the excavation slope ratio of the foundation pit 1 is set to meet the temporary stability requirement of the foundation pit 1.
The foundation pit 1 is internally poured with a hole body 3, the top of the hole body 3 is arched, the hole body 3 is formed by pouring reinforced concrete, the hole body 3 mainly bears the dead weight of an upper protection structure and takes partial accumulated snow load into consideration, the hole body 3 in the embodiment adopts a reinforced concrete structure, the thickness of the hole body 3 is designed according to the upper load, and the width, the height and other structural dimensions of the hole body 3 are set according to the actual road requirement;
be equipped with back filling layer 2 between foundation ditch 1 bottom and the cavity 3 bottom, back filling layer 2 is backfilled by backfill 7 and is formed, and back filling layer 2 adopts the level to join in marriage sand gravel soil backfill tamp formation in foundation ditch 1 bottom in this embodiment, and aim at reduces because of lower part foundation soil body is inhomogeneous, causes stress concentration problem to upper portion rigid structure, and can make cavity 3 pour the back more steady. In the actual design process, the backfill layer 2 is determined by the properties of the bottom covering layer of the foundation pit 1, if the bottom covering layer of the foundation pit 1 is better in covering and gathering, compact in structure and free from large boulder distribution, the design of the backfill layer 2 can be canceled.
The bottom of the hole body 3 is provided with a roadbed, the roadbed is formed by adopting concrete casting, and the concrete roadbed is of conventional design and can meet traffic requirements.
In the embodiment, drainage ditches 6 are arranged on two sides of the roadbed and are used for receiving groundwater drained by the drainage pipes 5 of the hole body 3; the both sides of the hole body 3 are provided with drain pipes 5, drain pipes 5 drain water to the direction of the drain ditch 6, the drain pipes 5 are used for dredging and draining groundwater in the soil body, in the embodiment, drain pipes 5 at both sides of the hole body 3 are downwards inclined to the direction of the drain ditch 6, and the quantity of drain pipes 5 needs to consider the supply of snow melting infiltration to groundwater.
The apron 8 is equipped with in cavity 3 top, the space between cavity 3 and the foundation ditch 1 is filled with backfill 7, make the protective structure in this embodiment and ground form an organic whole, share a part upper portion load simultaneously, it is closely knit to need backfill between cavity 3 and the foundation ditch 1, backfill 7 adopts graded broken stone soil or sand ovum gravel soil, the backfill height of backfill 7 should surpass cavity 3's top, the height of backfill 7 backfill in this embodiment surpasss cavity 3 top arch more than 0.5m, prevent cavity 3 and apron 8 direct rigid contact, can let the load bear by the ground as far as possible like this, reduce cavity 3 atress.
The cover plate 8 in this embodiment is a reinforced concrete slab or beam, and the purpose of the structural arrangement of the cover plate 8 is mainly to bear the avalanche impact load transferred by the cover plate 8, the static load when the avalanche is piled up and stays, and the dead weight load of the upper structure of the cover plate 8, and the structural design is performed according to factors such as the avalanche scale, the distance between the structural body and the bank slope, the size of solitary stone in the avalanche, and the like, when the cover plate is close to the bedrock slope, when the cover plate is possibly subjected to the vertical impact protection system of the avalanche-carried solitary stone, rib plates can be arranged inside the cover plate 8, so that the ribbed plate-beam structural form is formed.
A flexible cushion layer 9 for buffering the vertical impact kinetic energy of the avalanche is arranged above the cover plate 8, the flexible cushion layer 9 is a medium coarse sand layer, namely medium coarse sand is filled on the cover plate 8, the main function of the flexible cushion layer 9 is to flexibly buffer the vertical impact kinetic energy of the avalanche, the thickness of the flexible cushion layer 9 is 1 m-3 m, and when the protective structure in the embodiment is closer to a bedrock slope, the thickness is larger.
The top of the flexible cushion 9 is provided with a concrete cover layer 10 formed by concrete pouring, the main function of the concrete cover layer 10 is to protect the flexible cushion 9, prevent the flexible cushion 9 from being degraded in the avalanche migration process, and when the protective structure in the embodiment is far away from the bedrock side slope and the topography is gentle, the concrete cover layer 10 adopts a C20 concrete slab with the thickness of 0.2 m.
The surface of the concrete cover layer 10 is coated with a concrete surface layer 11, and the concrete surface layer 11 is smoothly connected with the original ground (namely, smoothly transited), specifically: the concrete surface layer 11 is relatively smooth by plastering 5cm impact-resistant and abrasion-resistant concrete on the surface of the concrete cover layer 10, so that the concrete cover layer 10 is prevented from being degraded in the avalanche movement process, meanwhile, the surface roughness is reduced, the friction resistance between the avalanche and a lower structure in the movement process is reduced, the concrete surface layer 11 is required to be connected with the original ground, and the resistance of the avalanche in the movement process can be reduced.
The both sides of concrete facing 11 all are connected with tooth wall 12, and tooth wall 12's surface and concrete facing 11 parallel and level can avoid producing the obstacle to the avalanche motion like this, and tooth wall 12 is reinforced concrete tooth wall 12 in this embodiment, and the stability of mainly used guarantee concrete facing 11 prevents that concrete facing 11 from being driven at the avalanche in-process of passing. The reinforced concrete tooth wall 12 is inserted into the body through the bottom, so that the supporting effect on the concrete surface layer 11 is better and more stable.
In another embodiment, a buffer layer 13 is arranged between the concrete surface layer 11 and the bedrock, the buffer layer 13 is formed by rubble concrete, the surface of the buffer layer 13 is arc-shaped and is smoothly connected with the concrete surface layer 11, when the whole protective structure in the embodiment is closer to the bedrock slope, the joint part of the bedrock slope foot and the natural covering layer adopts rubble concrete for backfilling to form the buffer layer 13 structure so as to change the avalanche migration track, reduce the vertical impact kinetic energy of the avalanche on the whole protective structure, and the gradient of the buffer layer 13 can take the average value of the slope of the bedrock topography and the slope of the covering layer topography. The rock concrete buffer layer 13 adopts an arc chamfer form, is in smooth transition with the concrete surface layer 11 and the bedrock side slope, can play a role in gradient change of the terrain, is beneficial to changing the avalanche movement track and reduces the impact force generated by avalanche.
When the whole protective structure is far away from the bedrock slope, the concrete surface layer 11, the tooth wall 12 and the buffer layer 13 can be canceled or simplified according to the actual situation on site.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (10)
1. The utility model provides an avalanche highway section buries formula protective structure, includes the foundation ditch, its characterized in that, pour the hole body in the foundation ditch, the bottom of the hole body is equipped with the road bed, hole body top is equipped with the apron, and the space between hole body and the foundation ditch is filled with backfill, the apron top is equipped with the flexible bed course that is used for buffering the vertical impact kinetic energy of avalanche.
2. The avalanche road section buried protective structure according to claim 1, wherein a top of said flexible cushion layer is provided with a concrete cover layer formed by concrete casting.
3. The avalanche road section buried protective structure according to claim 2, wherein a concrete surface layer is smeared on the surface of the concrete cover layer, and the concrete surface layer is smoothly connected with the original ground.
4. The avalanche road section buried protective structure according to claim 3, wherein two sides of the concrete surface layer are connected with tooth walls, and surfaces of the tooth walls are flush with the concrete surface layer.
5. The avalanche road section buried protective structure according to claim 3 or 4, characterized in that a buffer layer is arranged between the concrete surface layer and the bedrock, said buffer layer being composed of a rubble concrete.
6. The avalanche road section buried protective structure according to claim 5, wherein the surface of said buffer layer is arc-shaped and is smoothly connected with the concrete surface layer.
7. The avalanche road section buried guard structure according to claim 1, wherein rib plates are provided inside the cover plate.
8. The avalanche road section buried protective structure according to claim 1, wherein drainage ditches are arranged on two sides of the roadbed, drainage pipes are arranged on two sides of the hole body, and the drainage pipes drain water towards the drainage ditches.
9. The avalanche road section buried protective structure according to claim 1, wherein a backfill layer is arranged between the bottom of the foundation pit and the bottom of the hole body.
10. The avalanche road section buried guard structure according to claim 1, wherein the backfill soil is backfilled to a height exceeding the top of the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320660509.3U CN219825359U (en) | 2023-03-29 | 2023-03-29 | Buried protective structure for avalanche road section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320660509.3U CN219825359U (en) | 2023-03-29 | 2023-03-29 | Buried protective structure for avalanche road section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219825359U true CN219825359U (en) | 2023-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320660509.3U Active CN219825359U (en) | 2023-03-29 | 2023-03-29 | Buried protective structure for avalanche road section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219825359U (en) |
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2023
- 2023-03-29 CN CN202320660509.3U patent/CN219825359U/en active Active
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