CN214061645U - Complicated mountain area bridge tunnel connection structure - Google Patents
Complicated mountain area bridge tunnel connection structure Download PDFInfo
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- CN214061645U CN214061645U CN202022635048.3U CN202022635048U CN214061645U CN 214061645 U CN214061645 U CN 214061645U CN 202022635048 U CN202022635048 U CN 202022635048U CN 214061645 U CN214061645 U CN 214061645U
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Abstract
The utility model discloses tunnel engineering technical field provides a complicated mountain area bridge tunnel connection structure, including preventing falling high open cut tunnel and rather than the conventional open cut tunnel of intercommunication, conventional open cut tunnel intercommunication tunnel blind hole, prevent falling high open cut tunnel from upwards once being provided with the pile foundation down, cushion cap, retaining wall and backfill earthwork, the backfill earthwork sets up between retaining wall and basement rock, prevents falling high open cut tunnel of filling in of stone and sets up on the backfill earthwork, the abutment separately sets up with the retaining wall, the road surface elevation of abutment and the road surface elevation parallel and level of conventional open cut tunnel, fill the safety that the open cut protected the tunnel entrance through preventing falling high.
Description
Technical Field
The utility model relates to a tunnel engineering technical field particularly, relates to a complicated mountain area bridge tunnel connection structure.
Background
In the southwest area of China, when high-speed railways and highways are built in mountainous areas similar to intersecting mountains, Yunobu plateaus, Qinghai-Tibet plateau eastern edge Longmen mountains, mud mountains, Erlang mountains, Qinling mountains, big mountains and the like, because the topographic and geological conditions are extremely complex, slopes are steep, rock masses are broken, and collapse and falling rocks are frequent in geological disasters, at present, many projects are designed to directly connect bridges and tunnel portals, so that dangerous rocks and falling rocks often fall onto the tunnel portals and bridge floors, and the driving and engineering structure safety is seriously threatened. Because tunnel entrance side up slope is high steep, conventional dangerous rock initiative is consolidated, passive safeguard measure cost is high, the treatment degree of difficulty is big, the period is long, long-term effect is poor, if: the entrance of the mulberry tunnel near the fracture zone of the rear mountain of the gantry is designed to be directly connected with the bridge tunnel, and the threat of collapse and rock fall is great.
The application numbers are: 201721717106.9, which discloses a mountain high-speed railway tunnel bridge-protecting open cut tunnel structure, by adding the open cut tunnel and setting the pile foundation of the open cut tunnel on the bedrock, the tunnel portal is protected in turn and the harm caused by settlement is avoided, however, this design method is not suitable for the situation of mountain height and steepness, rock weathering and fragmentation, and the dangerous rock is extremely developed, such as the above-mentioned lawn tunnel portal, abutment and open cut tunnel are all set on the bedrock (bearing layer) through the pile foundation, the vertical bearing capacity is poor, the impact resistance is poor, and the construction is complex, the construction period is relatively long, and the construction cost is relatively high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a complicated mountain area bridge tunnel connection structure protects the safety of tunnel portal through preventing that the high open cut tunnel of filling up of falling rocks.
The embodiment of the utility model discloses a realize through following technical scheme: the utility model provides a complicated mountain area bridge tunnel connection structure, including the conventional open cut tunnel of preventing falling rocks height to fill out the open cut tunnel and rather than the intercommunication, conventional open cut tunnel intercommunication tunnel blind hole, the open cut tunnel is filled out to the height of preventing falling rocks is provided with pile foundation, cushion cap, retaining wall and backfill earthwork from making progress down, the backfill earthwork sets up between retaining wall and basement rock, the open cut tunnel is filled out to the height of preventing falling rocks sets up on the backfill earthwork, the abutment separately sets up with the retaining wall, the road surface elevation parallel and level of the road surface elevation of abutment and conventional open cut tunnel.
Furthermore, a side wall is arranged on the retaining wall and arranged on one side of the rock fall prevention high-fill open cut tunnel.
Furthermore, the side wall and the anti-falling-stone high-filling open cut tunnel are integrally arranged, and the side wall is higher than the anti-falling-stone high-filling open cut tunnel.
Furthermore, a plurality of lighting holes are formed in the side wall, and one ends of the lighting holes penetrate through the anti-falling stone high-filled open cut tunnel.
Furthermore, a plurality of water drainage grooves are formed in the side wall, the water drainage grooves are formed in the outer side of the side wall, one ends of the water drainage grooves penetrate through the side wall and are formed in the joint of the side wall and the anti-rock fall high-fill open cut tunnel.
Furthermore, the top of the side wall is provided with a grid net.
Furthermore, roadbed backfill is arranged between the side walls and the bedrock and covers the anti-falling rock high-fill open cut tunnel and the conventional open cut tunnel.
Furthermore, a buffer layer and a water-resisting layer are arranged on the roadbed backfill material.
Furthermore, the backfill earth comprises a pebble layer, an artificial fill layer and a flaky stone concrete backfill layer from bottom to top in sequence.
Further, still be equipped with the scour protection wall, the scour protection wall sets up in the outside of pile foundation and is fixed in on the earth's surface, and artifical fill layer sets up between basement rock and scour protection wall, and artifical fill layer wraps up the pile foundation entirely.
The utility model discloses technical scheme has following advantage and beneficial effect at least: 1, protecting a junction between a tunnel portal and a bridge by additionally arranging a high-fill open cut tunnel for preventing falling rocks; 2, constructing a foundation of the anti-falling high-fill open cut tunnel through pile foundations, bearing platforms, retaining walls and backfill earth, and reducing construction cost on the premise of ensuring the bearing capacity of the foundation; 3, on the basis of not changing the original abutment, a rock fall prevention high filling open cut tunnel is additionally arranged, so that the manufacturing cost is further reduced; 4, the anti-falling rock high-fill open cut tunnel foundation and the bridge foundation are separately arranged, so that the mutual influence of the foundation and the bridge foundation is small under the hazards of different settlement and geological disasters.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic front structural view of a bridge-tunnel connection structure in a complex mountainous area according to the present invention;
fig. 2 is a schematic diagram of a front structure of a bridge-tunnel connection structure in a complex mountainous area according to the present invention;
fig. 3 is a schematic side view of a complex mountain bridge-tunnel connection structure provided by the present invention;
FIG. 4 is an enlarged view A of FIG. 3;
icon: 1-rockfall prevention high-fill open cut tunnel, 2-conventional open cut tunnel, 3-tunnel blind hole, 10-pile foundation, 20-bearing platform, 30-retaining wall, 40-backfill earthwork, 41-pebble layer, 42-artificial fill layer, 43-sheet stone concrete backfill layer, 50-side wall, 51-lighting hole, 52-drainage groove, 60-roadbed backfill, 61-polystyrene layer, 62-film layer, 63-reinforced concrete layer, 64-tire buffer layer, 65-soil stone backfill layer, 66-clay water-resisting layer, 67-drainage ditch, 70-grid net, 100-bedrock, 210-bridge abutment, 220-bridge foundation and 230-support.
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. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus, cannot be understood as a limitation of the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
A bridge-tunnel connection structure for a complex mountain area comprises an anti-rockfall open cut tunnel 1 and a conventional open cut tunnel 2 communicated with the anti-rockfall open cut tunnel 1, wherein the conventional open cut tunnel 2 is communicated with a tunnel blind hole 3, the anti-rockfall open cut tunnel 1 is provided with a pile foundation 10, a bearing platform 20, a retaining wall 30 and a backfill earthwork 40 from bottom to top in one step, the backfill earthwork 40 is arranged between the retaining wall 30 and a bedrock 100, in the embodiment, a pebble layer 41 is backfilled between the pile foundation 10 and the bedrock 100, the pile foundation 10 extends into the ground to a depth of 2-5 m according to the bridge structure, an artificial fill layer 42 is backfilled between the pile foundation 10 and the bedrock 100 on the ground, the artificial fill layer 42 is positioned above the pebble layer 41, in addition, C15 rockfall concrete is backfilled between the retaining wall 30 and the bedrock 100, part of the C15 rockfall open cut tunnel concrete is supported by the bearing platform 20 and the bedrock 100, the anti-rockfall open cut tunnel 1 is arranged on a C15 rockfall concrete backfill layer 43, the foundation structure of the whole anti-falling-stone high-fill open cut tunnel 1 mainly comprises a pile foundation 10, a bearing platform 20 and a retaining wall 30, and the rest is processed in a backfilling mode, so that the whole manufacturing cost is greatly reduced.
In some embodiments, in order to ensure the horizontal supporting force of the pile foundation 10, an anti-impact wall is further provided, the anti-impact wall is disposed outside the pile foundation 10 and fixed on the ground surface, the artificial fill layer 42 is disposed between the bedrock 100 and the anti-impact wall, and the artificial fill layer 42 completely wraps the pile foundation 10, the artificial fill layer 42 is fixed through the anti-impact cavity, so as to fix the pile foundation 10, it should be noted that, as required, the outer surface of the artificial fill layer 42 may further be provided with a shotcrete.
The abutment 220 is separately provided from the retaining wall 30, and the pavement elevation of the abutment 210 is flush with the pavement elevation of the conventional open cut tunnel 2; it should be noted here that the retaining wall 30 of the abutment 220 is separately disposed, including the two are separately disposed or the abutment 220 passes through the retaining wall 30, and the construction is performed according to the actual construction requirement, and it should be noted that in this embodiment, taking a porous bridge as an example, when the anti-falling-rock high-fill open cut tunnel 1 is additionally disposed, the length of the anti-falling-rock high-fill open cut tunnel 1 may be the length of one bridge opening, and at this time, one bridge opening is removed, and the pile foundation 10 of the anti-falling-rock high-fill open cut tunnel 1 is disposed close to the abutment 220 of the porous bridge, and at this time, the abutment 210 is level with the road surface elevation of the conventional open cut tunnel 2 and level with the road surface elevation of the anti-falling-rock high-fill open cut tunnel 1, and this construction is performed without redesigning the bridge technology to additionally dispose the anti-falling-rock high-fill open cut tunnel 1, thereby further reducing the construction cost.
In this embodiment, the anti-falling-stone high-fill open cut tunnel 1 comprises an end wall, a side wall and a vault, and a water outlet groove is arranged on the vault.
In some embodiments, the retaining wall 30 is provided with a side wall 50, the side wall 50 is disposed at one side of the open cut cave 1 filled with falling rocks, roadbed backfill 60 is disposed between the side wall 50 and the bedrock 100, the roadbed backfill 60 covers the open cut cave 1 filled with falling rocks and the conventional open cut cave 2, a protective layer is constructed by the roadbed backfill 60, so as to protect the open cut cave 1 filled with falling rocks from being impacted by more serious falling rocks of the mountain, and improve the service life, further, a buffer layer can be disposed on the roadbed backfill 60, specifically, the buffer layer includes, but is not limited to, a waste tire layer, a clay water barrier layer 66, etc., to increase the functionality thereof, it should be noted that how much the roadbed backfill layer covers the open cut cave 1 filled with falling rocks is completely determined by the field exploration structure, for example, the roadbed backfill layer completely covers and the buffer layer is disposed as a polystyrene layer 61 from bottom to top, the film isolation layer, reinforced concrete layer 63, tire buffer layer 64, soil stone backfill layer 65 and clay water barrier 66 provide the purpose of buffering and water proof in proper order, still are provided with escape canal 67 simultaneously on clay water barrier 66, utilize escape canal 67 to come the drainage, it needs to explain that, in order to guarantee the rate of permeating water, the mode that sets up of this kind of buffer layer only need lay prevent that the falling rocks height fills up open cut tunnel 1 top can.
Further, in some embodiments, the height of the side wall 50 is higher than the clay water barrier 66, and one side of the side wall 50 close to the clay water barrier 66 is sequentially provided with a tire buffer layer 64 and a reinforced concrete layer 63 to sequentially bear waste rocks sliding down from a mountain, so as to ensure that the waste rocks cannot impact a building below with a large impact amount as much as possible, and further, a grid net 70 can be further arranged at the top of the side wall 50 to place the waste rocks to fall.
In some embodiments, the side wall 50 and the rock fall prevention high-cut tunnel 1 are integrally arranged, and the side wall 50 is provided with a plurality of lighting holes 51, and one end of each lighting hole 51 penetrates through the rock fall prevention high-cut tunnel 1 to provide illumination, it should be noted that, because the side wall 50 is arranged on the other side of the rock fall prevention high-cut tunnel 1 relative to the bedrock 100, the lighting holes are completely different from concerns about damage of rock fall, further, under the design allowed by the structure, engineering materials are reduced, further, the side wall 50 is provided with a plurality of drainage channels 52, the drainage channels 52 are arranged on the outer side of the side wall 50, and one end of each drainage channel 52 penetrates through the side wall 50 and is arranged at the connection position of the side wall 50 and the rock fall prevention high-cut tunnel 1. By the design of the drainage channel 52, rainwater in the roadbed backfill 60 can be ensured to be drained from the drainage channel 52, in addition, a drainage pipe is arranged in the roadbed backfill 60 between the anti-falling rock high-fill open cut tunnel 1 and the bedrock 100 for drainage, and it should be noted that the roadbed backfill 60 near the drainage pipe adopts M5 to fill masonry or other filling waste materials with better water permeability.
In some embodiments, deformation joints are arranged between the anti-falling-stone high-filling open cut tunnel 1 and the conventional open cut tunnel 2, but are not limited to wood asphalt, and through the deformation joints and the relatively independently arranged abutment 220 and pile foundation 10, the anti-falling-stone high-filling open cut tunnel 1, the conventional open cut tunnel 2 and the abutment 220 are in flexible false connection, so that the open cut tunnel structure is prevented from being cracked due to stress concentration caused by uneven settlement caused by overlarge local stress, and meanwhile, the influence of abutment 210 vibration on the open cut tunnel structure generated when a vehicle passes through can be isolated to the greatest extent.
In some embodiments, in order to better combine the connection between the bridge abutment 210 and the rock fall prevention high-fill open cut tunnel 1, a support is further provided, the support is used for connecting the bridge abutment 210 and the bridge foundation 220, the support is made of reinforced concrete and comprises a supporting portion and a blocking portion, the supporting portion is used for connecting the bridge abutment 210 and the bridge foundation 220, the blocking portion is used for blocking the C15 slab stone concrete layer, and the height of the blocking layer does not exceed the road surface elevation of the bridge abutment 210.
In the present embodiment, conventional hole 2 includes, but is not limited to, a binaural wall hole.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a complicated mountain area bridge tunnel connection structure which characterized in that: including preventing falling high conventional open cut tunnel of filling in open cut tunnel and rather than the intercommunication, conventional open cut tunnel intercommunication tunnel blind hole, prevent falling high open cut tunnel of filling in of stone from upwards being provided with pile foundation, cushion cap, retaining wall and backfill earthwork down, the backfill earthwork set up in between retaining wall and the basement rock, prevent falling high open cut tunnel of filling in of stone set up in on the backfill earthwork, the abutment with the retaining wall separately sets up, the road surface elevation of abutment with the road surface elevation parallel and level of conventional open cut tunnel.
2. The complex mountainous area bridge-tunnel connection structure as claimed in claim 1, wherein a side wall is provided on the retaining wall, and the side wall is provided on one side of the rockfall prevention high-filled open cut tunnel.
3. The complex mountainous area bridge-tunnel connection structure as claimed in claim 2, wherein the side wall is integrally disposed with the open cut tunnel filled with falling rocks, and the side wall is higher than the open cut tunnel filled with falling rocks.
4. The complex mountainous area bridge-tunnel connection structure as claimed in claim 3, wherein a plurality of lighting holes are formed on the side wall, and one end of the plurality of lighting holes penetrates through the anti-rockfall high-fill open cut tunnel.
5. The complex mountainous area bridge-tunnel connection structure as claimed in claim 4, wherein a plurality of drainage channels are arranged on the side wall, the drainage channels are arranged on the outer side of the side wall, and one ends of the drainage channels penetrate through the side wall and are arranged at the connection position of the side wall and the anti-rockfall high-fill open cut tunnel.
6. The complex mountainous area bridge-tunnel connection structure as claimed in claim 5, wherein a grid net is provided on the top of the side wall.
7. The complex mountainous area bridge-tunnel connection structure as claimed in any one of claims 2 to 6, wherein roadbed backfill is arranged between the side walls and the bedrock, and covers the anti-falling-stone high-fill open cut tunnel and the conventional open cut tunnel.
8. The complex mountainous area bridge-tunnel connection structure as claimed in claim 7, wherein a buffer layer and a water-proof layer are arranged on the roadbed backfill material.
9. The complex mountainous area bridge-tunnel connection structure as claimed in claim 1, wherein the backfill earthwork comprises a pebble layer, an artificial fill layer and a rubble concrete backfill layer from bottom to top in sequence.
10. The complex mountainous area bridge-tunnel connection structure as claimed in claim 9, further comprising an anti-impact wall, wherein the anti-impact wall is disposed outside the pile foundation and fixed on the earth surface, the artificial fill layer is disposed between the bedrock and the anti-impact wall, and the pile foundation is completely wrapped by the artificial fill layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022635048.3U CN214061645U (en) | 2020-11-13 | 2020-11-13 | Complicated mountain area bridge tunnel connection structure |
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| CN202022635048.3U CN214061645U (en) | 2020-11-13 | 2020-11-13 | Complicated mountain area bridge tunnel connection structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419107A (en) * | 2022-09-17 | 2022-12-02 | 上海建工一建集团有限公司 | Soil piling structure for artificial mountain-shaped building in deformation sensitive area and construction method thereof |
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2020
- 2020-11-13 CN CN202022635048.3U patent/CN214061645U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419107A (en) * | 2022-09-17 | 2022-12-02 | 上海建工一建集团有限公司 | Soil piling structure for artificial mountain-shaped building in deformation sensitive area and construction method thereof |
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