CN216240724U - Tunnel structure for passing through large karst cave - Google Patents
Tunnel structure for passing through large karst cave Download PDFInfo
- Publication number
- CN216240724U CN216240724U CN202122777942.9U CN202122777942U CN216240724U CN 216240724 U CN216240724 U CN 216240724U CN 202122777942 U CN202122777942 U CN 202122777942U CN 216240724 U CN216240724 U CN 216240724U
- Authority
- CN
- China
- Prior art keywords
- supporting
- tunnel
- karst cave
- bridge
- arch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model discloses a tunnel structure passing through a large karst cave, which comprises a supporting structure for supporting surrounding rocks at the top and a bridge span structure for supporting a tunnel lining, wherein the supporting structure comprises an arch bridge structure, an anchor-shotcrete supporting structure and vertical supporting columns. The supporting structure is arranged to support and protect the whole top surrounding rock and the key blocks in the top surrounding rock, so that the key blocks and non-key blocks in the top surrounding rock are effectively prevented from falling off, the safety is good, and the protection effect is good; through setting up the bridge span structure and providing the installation base member for tunnel lining, can satisfy tunnel lining's linear design height and design slope simultaneously, and can avoid carrying out tunnel lining's construction in the weak geology of solution cavity bottom, guarantee the construction quality of the fashioned tunnel of construction.
Description
Technical Field
The utility model belongs to the technical field of tunnel construction, and particularly relates to a tunnel structure passing through a large karst cave.
Background
The karst geology of China is mainly and intensively distributed in parts of areas such as the cloud, the noble, the three-province, the Shuangguang and the two lakes, and the like, along with the rapid development of the economy of China and the deep implementation of the western large development, the construction strength of the infrastructure of the areas is continuously increased, and the continuous planning construction of large-scale highway and railway engineering needs to deal with a large number of engineering problems caused by the karst geology, particularly the karst tunnel engineering problem. Due to the improvement of the design standard of the railway, the large and deep buried karst tunnel is inevitably generated due to the limitation of the longitudinal slope and the curve radius of the line. In the process of tunnel construction in a karst area, the situation that the tunnel passes through a karst cave, a karst cavity and a river is often encountered, the tunnel is usually processed by methods such as backfill grouting and bridge crossing, the backfill grouting is filled by gravels, soil bodies and concrete and is commonly used for processing the karst cave and the karst cavity of the small karst cave; for large karst caves, bridges are generally adopted to span in order to avoid a large amount of backfilling and facilitate drainage, some dangerous blocks, namely key blocks, which are generated due to the rock stratum joint separation effect may exist above the cave wall of the large karst cave, and the key blocks may slide, loosen and fall under the long-term natural action, even further induce greater disasters, so that the construction difficulty of the bridge in the large karst cave is greater.
Therefore, a tunnel structure which is simple in structure and reasonable in design and penetrates through a large karst cave is needed nowadays, and the problem that the construction difficulty of the tunnel in the existing large karst cave is large is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems in the prior art, and provides a tunnel structure passing through a large karst cave, which has the advantages of simple structure, reasonable design and convenient construction, realizes the construction of the tunnel in the large karst cave, supports and protects the whole top surrounding rock of the large karst cave and key blocks in the top surrounding rock through a supporting structure, and has good safety; and a bridge span structure is arranged to provide a mounting base body for the tunnel lining, so that the tunnel lining construction is avoided on the weak geology at the bottom of the karst cave cavity, and the construction quality of the tunnel formed by construction is ensured.
In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a tunnel structure that passes through large-scale solution cavity, large-scale solution cavity includes solution cavity hole wall and solution cavity, solution cavity hole wall includes top country rock, lateral wall country rock and bottom country rock, its characterized in that: the tunnel lining supporting structure comprises a supporting structure for supporting top surrounding rocks and a bridge span structure for supporting a tunnel lining;
the supporting structure comprises an arch bridge structure arranged in the cavity of the karst cave, an anchor-shotcrete supporting structure arranged on the surrounding rock at the top, and a plurality of vertical supporting columns which are arranged on the arch bridge structure and used for supporting key blocks in the surrounding rock at the top;
the bridge span structure is arranged on the surrounding rock at the bottom, and the bridge span structure is positioned below the arch bridge structure.
The tunnel structure passing through the large karst cave is characterized in that: the arch bridge structure comprises a main pier arranged in the cavity of the karst cave, arch seats symmetrically arranged on two sides of the main pier and located in the side wall surrounding rocks, and an arch bridge connected between the main pier and the arch seats.
The tunnel structure passing through the large karst cave is characterized in that: anchor spouts supporting construction including set up at the reinforcing bar net on top country rock surface, all set up concrete layer and stock on the reinforcing bar net, concrete layer and stock are located respectively the both sides of reinforcing bar net, the quantity of stock is a plurality of, and is a plurality of the stock all stretches into to the top in the country rock.
The tunnel structure passing through the large karst cave is characterized in that: the quantity of vertical support post is a plurality of, the bottom and the arch bridge fixed connection of vertical support post, the top surface and the concrete layer fixed connection of vertical support post.
The tunnel structure passing through the large karst cave is characterized in that: the bridge span structure comprises two pile bodies which are arranged in parallel and a bearing platform connected between the two pile bodies, the bottoms of the pile bodies stretch into surrounding rocks at the bottom, the bearing platform is positioned at the tops of the pile bodies, and the tunnel lining is positioned on the bearing platform.
Compared with the prior art, the utility model has the following advantages:
the supporting structure is arranged to support and protect the whole top surrounding rock and the key blocks in the top surrounding rock, so that the key blocks and non-key blocks in the top surrounding rock are effectively prevented from falling off, the safety is good, and the protection effect is good; through setting up the bridge span structure and providing the installation base member for tunnel lining, can satisfy tunnel lining's linear design height and design slope simultaneously, and can avoid carrying out tunnel lining's construction in the weak geology of solution cavity bottom, guarantee the construction quality of the fashioned tunnel of construction.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Description of reference numerals:
1-cave wall of karst cave; 1-top surrounding rock; 1-2-side wall surrounding rock;
1-3-bottom wall rock; 2-karst cave cavity; 3, lining the tunnel;
4-vertical support columns; 5, main pier; 6-abutment;
7-arch bridge; 8-concrete layer; 9, anchoring the bolt;
10, a pile body; 11-bearing platform.
Detailed Description
As shown in fig. 1, the present invention includes a supporting structure for supporting a top surrounding rock 1-1 and a bridge span structure for supporting a tunnel lining 3;
the supporting structure comprises an arch bridge structure arranged in the karst cave cavity 2, an anchor-shotcrete supporting structure arranged on the top surrounding rock 1-1 and a plurality of vertical supporting columns 4 which are arranged on the arch bridge structure and used for supporting key blocks in the top surrounding rock 1-1;
the bridge span structure is arranged on the bottom surrounding rocks 1-3 and is positioned below the arch bridge structure.
In the embodiment, it is to be noted that the supporting structure is arranged to support and protect the whole top surrounding rock 1-1 and the key blocks in the top surrounding rock 1-1, so that the key blocks and non-key blocks in the top surrounding rock 1-1 are effectively prevented from falling, the safety is good, and the protection effect is good; through setting up the bridge span structure and providing the installation base member for tunnel lining 3, simultaneously, can satisfy tunnel lining 3's linear design height and design slope through setting up the bridge span structure of co-altitude not, and can avoid carrying out tunnel lining 3's construction on the weak geology of solution cavity 2 bottoms.
In this embodiment, in actual use, the number of the tunnel linings 3 is two.
In this embodiment, the arch bridge structure comprises a main pier 5 arranged in the karst cave cavity 2, arch bases 6 symmetrically arranged at two sides of the main pier 5 and located in the side wall surrounding rocks 1-2, and an arch bridge 7 connected between the main pier 5 and the arch bases 6.
In this embodiment, main mound 5, hunch seat 6 and arched bridge 7 are reinforced concrete structure, the bottom of main mound 5 stretches into in the surrounding rock 1-3 of bottom, has effectively strengthened the wholeness of arched bridge structure, the quantity of arched bridge 7 is two, is convenient for carry out the construction of arched bridge 7 in solution cavity 2 through setting up two arched bridges 7, solves the problem of construction difficulty when having an arched bridge 7 in the solution cavity 2.
In this embodiment, in practical use, the number of the arch bridges 7 is two, the two tunnel linings 3 may be respectively disposed below the two arch bridges 7, and the two tunnel linings 3 may be disposed below any one of the two arch bridges 7.
In this embodiment, the bolting and shotcrete supporting structure includes a reinforcing mesh arranged on the surface of the top surrounding rock 1-1, a concrete layer 8 and an anchor rod 9 both arranged on the reinforcing mesh, the concrete layer 8 and the anchor rod 9 are respectively located on both sides of the reinforcing mesh, the number of the anchor rods 9 is multiple, and the multiple anchor rods 9 all extend into the top surrounding rock 1-1.
In the embodiment, the integral top surrounding rock 1-1 is supported by arranging the anchor-shotcrete supporting structure, so that the integrity of the key blocks and the non-key blocks in the top surrounding rock 1-1 is effectively enhanced.
In this embodiment, the number of the vertical support columns 4 is a plurality of, the bottom of the vertical support columns 4 is fixedly connected with the arch bridge 7, and the top surfaces of the vertical support columns 4 are fixedly connected with the concrete layer 8.
In this embodiment, the vertical support columns 4 are reinforced concrete columns, and the key blocks in the top surrounding rock 1-1 are supported by the vertical support columns 4, so that the stability of the top surrounding rock 1-1 is enhanced.
In this embodiment, the bridge span structure includes two pile bodies 10 arranged in parallel and a bearing platform 11 connected between the two pile bodies 10, the bottom of the pile body 10 extends into the bottom surrounding rock 1-3, the bearing platform 11 is located at the top of the pile body 10, and the tunnel lining 3 is located on the bearing platform 11.
In this embodiment, the pile body 10 and the bearing platform 11 are both made of reinforced concrete, and the bottom of the pile body 10 extends into the bottom surrounding rocks 1-3, so that the bottom of the pile body 10 is combined with the bottom surrounding rocks 1-3, and the stability of the pile body 10 is improved.
When in use, the utility model mainly comprises the following steps:
step one, constructing an anchor-shotcrete supporting structure:
firstly, drilling a plurality of anchor rods 9 in top surrounding rock 1-1, wherein one ends of the anchor rods 9 extend into the top surrounding rock 1-1, the other ends of the anchor rods 9 are positioned in the karst cave cavity 2, then welding a reinforcing mesh at the end parts of the anchor rods 9 positioned in the karst cave cavity 2, and finally pouring concrete on the reinforcing mesh to form a concrete layer 8 so as to complete the construction of an anchor-shotcrete supporting structure; wherein, a plurality of anchor rods 9 are arranged along the width direction of the top surrounding rock 1-1;
step two, construction of an arch bridge structure:
firstly constructing a main pier 5 in a cave cavity 2, then constructing two arch seats 6 in side wall surrounding rocks 1-2, and finally constructing an arch bridge 7 between the main pier 5 and the arch seats 6 to complete the construction of an arch bridge structure;
step three, construction of the vertical supporting column:
constructing a plurality of vertical supporting columns 4 between the arch bridge 7 and the top surrounding rock 1-1;
step four, constructing a bridge span structure:
the number of the bridge span structures is two, the construction methods of the two bridge span structures are the same, when any one bridge span structure is constructed, two pile bodies 10 are constructed on the bottom surrounding rocks 1-3, and a bearing platform 11 is constructed on the tops of the two pile bodies 10, so that the construction of one bridge span structure is completed;
step five, construction of tunnel lining: the tunnel lining 3 is constructed on the bearing platform 11.
The supporting structure is arranged to support and protect the whole top surrounding rock and the key blocks in the top surrounding rock, so that the key blocks and non-key blocks in the top surrounding rock are effectively prevented from falling off, the safety is good, and the protection effect is good; through setting up the bridge span structure and providing the installation base member for tunnel lining, can satisfy tunnel lining's linear design height and design slope simultaneously, and can avoid carrying out tunnel lining's construction in the weak geology of solution cavity bottom, guarantee the construction quality of the fashioned tunnel of construction.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. A tunnel structure for traversing large-scale karst cave, the large-scale karst cave comprising a karst cave wall (1) and a karst cave cavity (2), the karst cave wall comprising top surrounding rocks (1-1), side wall surrounding rocks (1-2) and bottom surrounding rocks (1-3), characterized in that: the device comprises a supporting structure for supporting top surrounding rocks (1-1) and a bridge span structure for supporting a tunnel lining (3);
the supporting structure comprises an arch bridge structure arranged in the karst cave cavity (2), an anchor-shotcrete supporting structure arranged on the top surrounding rock (1-1), and a plurality of vertical supporting columns (4) which are arranged on the arch bridge structure and used for supporting key blocks in the top surrounding rock (1-1);
the bridge structure is arranged on the bottom surrounding rocks (1-3), and the bridge structure is positioned below the arch bridge structure.
2. A tunnel structure for traversing a large cavern according to claim 1, wherein: the arch bridge structure comprises a main pier (5) arranged in the karst cave cavity (2), arch seats (6) symmetrically arranged on two sides of the main pier (5) and located in the side wall surrounding rocks (1-2), and an arch bridge (7) connected between the main pier (5) and the arch seats (6).
3. A tunnel structure for traversing a large cavern according to claim 1, wherein: anchor shotcrete supporting construction is including setting up at top country rock (1-1) surperficial reinforcing bar net, all setting up concrete layer (8) and stock (9) on the reinforcing bar net, concrete layer (8) and stock (9) are located respectively the both sides of reinforcing bar net, the quantity of stock (9) is a plurality of, and is a plurality of stock (9) all stretch into to top country rock (1-1) in.
4. A tunnel structure for traversing a large cavern according to claim 3, wherein: the quantity of vertical support post (4) is a plurality of, the bottom and the arch bridge (7) fixed connection of vertical support post (4), the top surface and concrete layer (8) fixed connection of vertical support post (4).
5. A tunnel structure for traversing a large cavern according to claim 1, wherein: the bridge span structure comprises two pile bodies (10) which are arranged in parallel and a bearing platform (11) connected between the two pile bodies (10), wherein the bottom of each pile body (10) extends into surrounding rocks (1-3) at the bottom, the bearing platform (11) is positioned at the top of each pile body (10), and the tunnel lining (3) is positioned on the bearing platform (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122777942.9U CN216240724U (en) | 2021-11-12 | 2021-11-12 | Tunnel structure for passing through large karst cave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122777942.9U CN216240724U (en) | 2021-11-12 | 2021-11-12 | Tunnel structure for passing through large karst cave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216240724U true CN216240724U (en) | 2022-04-08 |
Family
ID=80940513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122777942.9U Active CN216240724U (en) | 2021-11-12 | 2021-11-12 | Tunnel structure for passing through large karst cave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216240724U (en) |
-
2021
- 2021-11-12 CN CN202122777942.9U patent/CN216240724U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103485363B (en) | Three-dimensional continuous frame formula reinforced concrete structure retaining wall | |
| CN201148621Y (en) | Miniature anti-slide pile composite structure | |
| CN211081876U (en) | Pass through weak surrounding rock tunnel preliminary bracing structure of rich water in broken area of fault | |
| CN210315186U (en) | Light arch bridge foundation structure | |
| CN208267862U (en) | A kind of bracing means at tunnel road surface crack | |
| CN111910660A (en) | Ultrahigh slope supporting structure and construction method thereof | |
| CN103321234B (en) | Constructing method of load-bearing structure built on high slope or geological complex area | |
| CN101838957A (en) | Integral type T-shaped outer cantilever roads and construction method thereof | |
| CN202148907U (en) | Non-isoparametric initial-stage supporting structure of four-lane large-span tunnel | |
| CN216240724U (en) | Tunnel structure for passing through large karst cave | |
| CN108691559A (en) | One kind helping hard and soft cooperative control method for gob side entry coal column | |
| CN203498863U (en) | Three-dimensional continuous-frame-type reinforced concrete structural retaining wall | |
| CN202989942U (en) | Wall foundation structure for soft soil or high backfill soil area | |
| CN213684135U (en) | Tunnel pavement longitudinal crack reinforcing and processing structure | |
| CN212175363U (en) | Frame-type anti-skidding structure with road system | |
| CN211975000U (en) | Roadway supporting structure based on soft rock stratum | |
| CN211227883U (en) | Rock foundation existing high-speed rail fine-grained soil filling embankment side width structure | |
| CN203174626U (en) | Geogrid reinforced wall | |
| CN210104765U (en) | High and large retaining structure of soft geological side slope | |
| CN209836780U (en) | Lightweight abutment with anchor plate | |
| CN209260748U (en) | A kind of stepped tower crane | |
| CN110777844A (en) | Wall supporting structure based on waste guardrail stand columns and construction method thereof | |
| CN206736743U (en) | Lay the easy structure of mountable steel bridge | |
| CN205934936U (en) | Utilization reduces road structure that a lotus fender system found that subtracts of retaining structure atress | |
| CN219119256U (en) | Tunnel passing structure of large-scale karst cave cavity stand top |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |