CN212454440U - Quick supporting construction of tunnel unilateral side wall exposure solution cavity - Google Patents
Quick supporting construction of tunnel unilateral side wall exposure solution cavity Download PDFInfo
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- CN212454440U CN212454440U CN202020279852.XU CN202020279852U CN212454440U CN 212454440 U CN212454440 U CN 212454440U CN 202020279852 U CN202020279852 U CN 202020279852U CN 212454440 U CN212454440 U CN 212454440U
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- tunnel
- supporting structure
- tarpaulin
- karst cave
- pipe column
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Abstract
The utility model discloses a quick supporting structure of a tunnel unilateral side wall exposed karst cave, which comprises a vertical support and an arch support, wherein the vertical support is positioned in the tunnel, and the top of the vertical support is positioned at the highest point of the karst cave on the tunnel face of the tunnel; the arched supports are arranged along the section of the tunnel on one side where the karst cave is located; the top surface of the karst cave is supported by the telescopic supporting structure; after the air in the gap between the tarpaulin and the top surface of the karst cave is pumped out through the air pump, the tarpaulin can be tightly attached to the top surface of the karst cave together, so that all gaps of the karst cave can be tightly filled with slurry during grouting. The utility model discloses the construction progress is fast, and construction method is simple, and workman low in labor strength can effectively improve the bearing capacity of supporting system moreover.
Description
Technical Field
The utility model relates to a tunnel support technical field especially relates to a quick supporting construction of tunnel unilateral side wall exposure solution cavity.
Background
The nineteenth century is the era of a bridge, the twentieth century is the era of a high-rise building, the twenty-first century is the era of an underground space, in recent years, with the rapid development of economy in China, the requirement of traffic infrastructure construction is continuously improved, and the construction of a road tunnel greatly improves the convenience of traffic transportation in the mountainous areas in the west. At present, the tunnel in the ascending world of China is built in the countries with the largest scale, technology and difficulty. Meanwhile, with the gradual implementation of the western major development strategy, the gravity center of the road and railway engineering construction gradually turns to the western mountain area with the high development of the karst, and huge challenges are brought to geological survey, construction safety and ecological environment.
Karst is a very common geological phenomenon on earth, and rocks from high mountains to the earth's crust thousands of meters deep are developed. China is wide in territory, east-west landform and landform have large differences, regional geological conditions are very complex, and karst geology is one of typical complex geological conditions. China is one of the countries with the widest distribution of karst geology in the world, and 960 ten thousand km in the country2The distribution area of the soluble rock stratum is about 344.3 km21/3, which occupies the territorial area. The karst geology is distributed throughout provinces, cities and autonomous regions of China, particularly in the areas of clouds, honours and cinnamon in the southwest of China, and a large amount of karst geology is distributed in the areas of Shanxi, Guangdong, Taiwan, Hunan, Zhejiang, Exi, Sichuan, southern Shaanxi and North China. According to the incomplete statistics of the tunnel of the railway which is built in the western part and under construction, the tunnel in the karst area accounts for about 50 percent, and according to the statistical data of the long tunnels of 26 highways and railways which are built in the karst area, the disasters such as karst collapse, water burst and the like are almost met in different degrees in the building, and the number of 10 over-large karst disasters accounts for 38.64 percent; and in 17 karst medium-length tunnels (2km-3km) in southwest and mid-south areas, about 50 percent of the large karst disasters occur.
Therefore, how to comprehensively judge the stability of the karst tunnel construction excavation from various aspects of various influencing factors and how to master the processing time and the processing scheme of geological disasters in the karst tunnel excavation process becomes a problem which needs to be solved urgently at present.
In the process of tunnel excavation, a karst cave can be encountered, the existing support mainly adopts a concrete retaining wall or a spray anchor support technology, the support capability of the existing support cannot achieve the expected support effect under the complex geological condition, and the support structure and the karst cave cannot deform together due to the fact that the support structure is not tightly combined.
Disclosure of Invention
To the problem that exists, the utility model aims at providing a can closely combine with the solution cavity, produce deformation jointly to the tunnel unilateral side wall that the space can closely be filled up to the thick liquid when making the slip casting exposes the quick supporting construction of solution cavity.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a quick supporting construction of tunnel unilateral side wall exposure cavern, the cavern is located the side in tunnel, its characterized in that: the rapid supporting structure comprises a vertical support and an arch support, the vertical support is positioned in the tunnel, and the top of the vertical support is positioned at the highest point of the karst cave on the tunnel face of the tunnel;
the arched supports are arranged along the section of the tunnel and are positioned on the section of the tunnel on the side where the karst cave is positioned;
still be equipped with the tarpaulin in the solution cavity, be equipped with the flexible bearing structure who is used for supporting the tarpaulin on the arch is strutted, flexible bearing structure will the tarpaulin prop to the top surface of solution cavity is right the top surface of solution cavity is strutted.
Furthermore, flexible bearing structure is including setting up the hydraulic cylinder on the arch is strutted, hydraulic cylinder's transmission end has set firmly the push rod, the top of push rod is connected with the telescopic link, the top of telescopic link with tarpaulin fixed connection.
Furthermore, the telescopic rod comprises a plurality of sections of tubular columns, sliding rails are symmetrically arranged on the inner wall of each section of tubular column, a limiting groove is formed in the position, close to the top end, of each sliding rail, a blocking piece is arranged at the bottom of each sliding rail, self-resetting balls matched with the limiting grooves are arranged at the bottom of the outer side wall of each section of tubular column, and the plurality of sections of tubular columns are mutually sleeved under the action of the sliding rails and the self-resetting balls.
Furthermore, an opening is formed in the bottom of each section of the pipe column, the push rod penetrates through the opening, and the top of the push rod is fixedly connected with the bottom of the innermost layer of the pipe column.
Furthermore, the tarpaulin is fixedly connected with the top of the innermost pipe column.
Furthermore, the diameter of a section of pipe column positioned at the inner layer is smaller than that of the pipe column positioned at the outer layer.
Furthermore, the vertical support adopts a steel pipe.
Furthermore, the arch support adopts a steel bar net sheet.
The utility model has the advantages that: compared with the prior art, the utility model has the improvement that,
1. the utility model adopts a structure combining vertical support and arch support, can support the top of the karst cave and simultaneously prevent accidents caused by cave collapse of the karst cave;
2. the telescopic rod in the utility model can be adjusted according to the height of the top of the karst cave, so that the tarpaulin at the top of the telescopic rod can be closely attached to the top of the karst cave; meanwhile, the telescopic rod can also support the top of the karst cave to prevent the karst cave from collapsing;
3. the utility model discloses well tarpaulin closely laminates with the top of solution cavity, and the tarpaulin produces deformation along with the shape at solution cavity top jointly to the space of solution cavity can closely be filled up to the thick liquid when making the slip casting, it is better to strut the effect.
4. The utility model discloses a tunnel unilateral side wall exposes quick supporting construction progress of solution cavity fast, and construction method is simple, and artifical low in labor strength can effectively improve the bearing capacity of supporting system moreover.
Drawings
Fig. 1 is a schematic diagram of the relationship between the karst cave and the tunnel of the present invention.
Fig. 2 is the utility model discloses the quick supporting construction main view of tunnel unilateral side wall exposure solution cavity.
Fig. 3 is a side view of the quick supporting structure of the tunnel unilateral side wall exposed karst cave of the utility model.
Fig. 4 is the connection schematic diagram of the telescopic rod of the present invention.
Fig. 5 is the internal section view of the telescopic rod of the present invention.
Wherein: 1-tunnel, 2-karst cave, 3-vertical support, 4-arch support, 41-hydraulic cylinder, 42-push rod, 5-cavity, 6-tarpaulin, 7-telescopic rod, 71-tubular column, 72-slide rail, 73-limit groove, 74-self-reset ball and 75-baffle.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.
Referring to the attached drawings 1-5, the rapid supporting structure for the tunnel unilateral wall exposed karst cave comprises a vertical support 3 and an arch support 4, wherein the karst cave 2 is located on the side face of a tunnel 1, the vertical support 3 is arranged in the tunnel 1, the vertical support 1 is made of steel pipes and vertically faces upwards from the ground, and the top end of the vertical support 1 reaches the highest point of the karst cave 2 on the tunnel face of the excavated tunnel 1.
The arch support 4 is a steel bar net piece which is punched along the section of the tunnel, a tarpaulin 6 is further arranged in the karst cave 2, a plurality of telescopic rods 7 for supporting the tarpaulin 6 are arranged on the steel bar net piece, the tarpaulin 6 is supported by the telescopic rods 7 to be in contact with the top surface of the karst cave 2, air is exhausted from a gap between the tarpaulin 6 and the top surface of the karst cave 2 by using an exhaust fan, so that a vacuum environment is formed between the tarpaulin 6 and the karst cave 2, the tarpaulin 6 is tightly attached to the top of the karst cave 2 under the action of vacuum, and a cavity 5 is formed between the arch support 4 and the tarpaulin 6; grouting is carried out in the cavity 5, and the fast support of the karst cave 2 is completed.
Specifically, a plurality of hydraulic cylinders 41 are arranged on the arch support 4, push rods 42 are fixed at the transmission ends of the hydraulic cylinders 41, and telescopic rods 7 are arranged at the tops of the push rods 42; the telescopic rod 7 is formed by sleeving a plurality of sections of pipe columns 71, the diameter of the pipe column 71 sleeved on the innermost layer is the smallest, the diameter of the pipe column 71 is larger towards the outer layer, and the top of the pipe column 71 on the innermost layer is fixed with the awning cloth 6.
Further, two sliding rails 72 are symmetrically welded on the inner wall of each section of the pipe column 71, a blocking piece 75 is arranged at the bottom of each sliding rail 72, and the blocking piece 75 and the sliding rails 72 are integrally formed; a limiting groove 73 is formed in the position, close to the top, of the sliding rail 72, a self-resetting ball 74 corresponding to the limiting groove 73 is arranged at the bottom of the outer side wall of each section of the pipe column 71, an opening is formed in the center of the bottom of each section of the pipe column 71, the push rod 42 penetrates through the opening, and the top of the push rod 42 is welded with the bottom of the innermost pipe column 71. The self-reset ball 74 is an elastic ball, a spring is arranged in the ball, the spring is compressed under the extrusion action of the slide rail, the ball is extruded in the slide rail under the actions of the slide rail and the spring, when the self-reset ball 74 moves to the limiting groove 73, the spring is not influenced by the slide rail any more, and the spring pushes the ball to be clamped into the limiting groove 73 while extending.
When not in use, the self-reset ball 74 is compressed in the slide rail 72 and is blocked by the blocking piece 75 at the bottom of the slide rail 72, so that the inner tubular column 71 is sleeved in the outer tubular column 71. When the self-resetting ball 74 moves to the position of the limiting groove 73, the self-resetting ball 74 is clamped into the limiting groove 73 and cannot move continuously; under the continuous action of the hydraulic cylinder 41, the innermost pipe column 71 drives the outer pipe column 71 to move upwards together through the interaction of the self-resetting balls 74 and the limiting grooves 73, the principle of the upward movement is the same as that of the innermost pipe column 71, and the hydraulic cylinder 41 stops working until the top of the innermost pipe column 71 reaches the top of the karst cave 2. Due to the fact that the top surface of the cavern 2 is uneven, the corresponding telescopic rods 7 at different positions are uneven in extending height under the action of the hydraulic cylinder 41, and the tarpaulin 6 can be in contact with the top of the cavern 2 at different positions. Meanwhile, the telescopic rod 7 can further support the top of the karst cave 2.
The utility model discloses at the in-process of construction, when the excavation tunnel meets unilateral side wall and has the solution cavity to reveal, carry out earlier from the face department in tunnel and do vertical support, then insert the arch along the section in tunnel and strut, the solution cavity stone on the arch is strutted in the clearance, and at arch support install hydraulic cylinder and telescopic link on the surface, when installation hydraulic cylinder and telescopic link, hydraulic cylinder and telescopic link must be installed respectively in the four corners that the arch was strutted, other positions department of strutting in the arch simultaneously installs hydraulic cylinder and telescopic link at random.
Further, bond the tarpaulin at the top of telescopic link, start hydraulic cylinder, the push rod promotes the telescopic link and pushes away the tarpaulin to the top of solution cavity, fixes the edge of tarpaulin and country rock together through the anchor rope, uses the air extractor to take out it to the vacuum in the gap department of tarpaulin and solution cavity, and the tarpaulin closely laminates with the top of solution cavity under the effect of vacuum, then to the tarpaulin with the middle cavity of arch strut the slip casting can.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a quick supporting construction of tunnel unilateral side wall exposure cavern, cavern (2) are located the side of tunnel (1), its characterized in that: the rapid supporting structure comprises a vertical support (3) and an arch support (4), the vertical support (3) is positioned in the tunnel, and the top of the vertical support (3) is positioned at the highest point of the karst cave (2) on the tunnel face of the tunnel (1);
the arch support (4) is arranged along the section of the tunnel (1), and the arch support (4) is positioned on the section of the tunnel (1) on one side where the karst cave (2) is positioned;
still be equipped with tarpaulin (6) in solution cavity (2), be equipped with the flexible bearing structure who is used for supporting tarpaulin (6) on arch is strutted (4), flexible bearing structure will tarpaulin (6) prop extremely the top surface of solution cavity (2), right the top surface of solution cavity (2) is strutted.
2. The rapid supporting structure of a tunnel unilateral wall exposed cavern according to claim 1, wherein: the telescopic supporting structure comprises a hydraulic cylinder (41) arranged on an arch support (4), a push rod (42) is fixedly arranged at a transmission end of the hydraulic cylinder (41), a telescopic rod (7) is connected to the top of the push rod (42), and the top of the telescopic rod (7) is fixedly connected with the tarpaulin (6).
3. The rapid supporting structure of a tunnel unilateral wall exposed cavern according to claim 2, wherein: the telescopic rod (7) comprises a plurality of sections of pipe columns (71), each section of pipe column (71) is symmetrically provided with a sliding rail (72) on the inner wall, a limiting groove (73) is formed in the position, close to the top end, of the sliding rail (72), a blocking piece (75) is arranged at the bottom of the sliding rail (72), each section of pipe column (71) is provided with a self-resetting ball (74) matched with the limiting groove (73), and the plurality sections of pipe columns (71) are mutually sleeved under the action of the sliding rail (72) and the self-resetting ball (74).
4. The rapid supporting structure of a tunnel unilateral side wall exposed cavern according to claim 3, wherein: an opening is formed in the bottom of each section of the pipe column (71), the push rod (42) penetrates through the opening, and the top of the push rod (42) is fixedly connected with the bottom of the innermost pipe column (71).
5. The rapid supporting structure of a tunnel unilateral side wall exposed cavern according to claim 3, wherein: the tarpaulin (6) is fixedly connected with the top of the innermost pipe column (71).
6. The rapid supporting structure of a tunnel unilateral side wall exposed cavern according to claim 3, wherein: the diameter of the pipe column (71) at the inner layer is smaller than that of the pipe column (71) at the outer layer.
7. The rapid supporting structure of a tunnel unilateral wall exposed cavern according to claim 1, wherein: the vertical supports (3) are steel pipes.
8. The rapid supporting structure of a tunnel unilateral wall exposed cavern according to claim 1, wherein: the arch support (4) is made of steel bar meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020279852.XU CN212454440U (en) | 2020-03-09 | 2020-03-09 | Quick supporting construction of tunnel unilateral side wall exposure solution cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020279852.XU CN212454440U (en) | 2020-03-09 | 2020-03-09 | Quick supporting construction of tunnel unilateral side wall exposure solution cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212454440U true CN212454440U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020279852.XU Expired - Fee Related CN212454440U (en) | 2020-03-09 | 2020-03-09 | Quick supporting construction of tunnel unilateral side wall exposure solution cavity |
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| Country | Link |
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| CN (1) | CN212454440U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109460A (en) * | 2021-11-23 | 2022-03-01 | 中铁广州工程局集团深圳工程有限公司 | Erecting shed frame for karst cave |
-
2020
- 2020-03-09 CN CN202020279852.XU patent/CN212454440U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109460A (en) * | 2021-11-23 | 2022-03-01 | 中铁广州工程局集团深圳工程有限公司 | Erecting shed frame for karst cave |
| CN114109460B (en) * | 2021-11-23 | 2023-08-11 | 中铁广州工程局集团深圳工程有限公司 | Karst cave is with setting up rack |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210202 Termination date: 20210309 |
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| CF01 | Termination of patent right due to non-payment of annual fee |