CN219034746U - Tunnel passing structure penetrating through water-rich karst cave - Google Patents
Tunnel passing structure penetrating through water-rich karst cave Download PDFInfo
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- CN219034746U CN219034746U CN202320101857.7U CN202320101857U CN219034746U CN 219034746 U CN219034746 U CN 219034746U CN 202320101857 U CN202320101857 U CN 202320101857U CN 219034746 U CN219034746 U CN 219034746U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The utility model provides a tunnel passing structure penetrating through a water-rich karst cave, wherein the interior of the water-rich karst cave is divided into a water storage area, a backfill area and a drainage area through a concrete retaining wall and a concrete retaining wall; the water storage area corresponds to the water inlet of the water-rich karst cave, the drainage area corresponds to the water outlet of the water-rich karst cave, and the water storage area is communicated with the drainage area through a drainage pipeline; the backfill area corresponds to a tunnel crossing area, and concrete is backfilled in the backfill area; and a drainage structure which is communicated with the drainage area and used for draining water is arranged in the drainage area corresponding to the water-rich karst cave. The beneficial effects of the utility model are as follows: according to the utility model, the water-rich karst cave is separated by the concrete retaining wall and the concrete retaining wall, so that a backfill area penetrated by the tunnel is separated from water; the water storage area and the drainage area are communicated through the drainage pipeline, so that water entering the karst cave through the water inlet of the water-rich karst cave is drained to the drainage area from the water storage area through the drainage pipeline and is drained through the drainage structure.
Description
Technical Field
The utility model relates to a tunnel passing structure penetrating through a water-rich karst cave. The method is suitable for the field of underground tunnel engineering, in particular to tunnel engineering penetrating through a water-rich karst cave.
Background
The karst cave is a natural cave formed by soluble rock stratum due to karst action, and when projects such as building foundation, hydraulic and hydroelectric tunnel and chamber, highway and railway tunnel, mining tunnel and the like pass through carbonate rock, sulfate rock and halogen salt rock strata, complex engineering problems related to the karst cave are often encountered. A large number of underground tunnel engineering practices show that karst cave distribution positions are random, development scales are different, filling conditions are different, and karst cave specificity and difference enable karst engineering to have unique characteristics, and the existing general geotechnical engineering construction process and construction specifications cannot be directly used for karst engineering.
The karst cave section shows that surrounding rock stability is poor in the construction process, disasters such as water burst, mud burst, earth surface subsidence, filler instability, tunnel bottom settlement, structural cracking and the like are prone to occurrence, and mainly due to the fact that the karst cave is low in self bearing capacity, cracks and cavities are fully developed, the karst cave volume can be further enlarged after meeting water, the properties of the internal filler are obviously weakened, stability of the internal filler is difficult to maintain, the internal filler and a water source of the karst cave can suddenly flow out to a tunnel in the excavation process, and life safety of construction workers and stable tunnel structure are seriously threatened.
If the tunnel passes through the karst cave, the cavity of the karst cave is large in volume, the karst cave is rich in water throughout the year, the water flow is large, permanent plugging cannot be directly carried out, and the drainage problem of the water quantity of the karst cave and the safety problem of the bearing structure of the tunnel are required to be paid special attention.
The difference of the karst cave treatment methods when the tunnel passes through the water-rich karst cave means that the water flow plugging and drainage structures are different, and the seepage prevention structures and the bearing structures of surrounding rocks of the tunnel are different, so that deformation and strength of the surrounding rocks are influenced, the whole sinking and even the instability of the whole structure of the tunnel can be caused, and water gushing disasters occur, so that the reasonable karst cave water flow treatment method and the reasonable tunnel passing structure are critical to the stability of the whole tunnel.
Disclosure of Invention
The utility model aims to solve the technical problems that: aiming at the problems, the tunnel passing structure penetrating through the water-rich karst cave is provided.
The technical scheme adopted by the utility model is as follows: the utility model provides a pass through tunnel of rich water karst cave structure which characterized in that: the inside of the water-rich karst cave is divided into a water storage area, a backfill area and a drainage area by a concrete retaining wall and a concrete retaining wall;
the water storage area corresponds to the water inlet of the water-rich karst cave, the drainage area corresponds to the water outlet of the water-rich karst cave, and the water storage area is communicated with the drainage area through a drainage pipeline; the backfill area corresponds to a tunnel crossing area, and concrete is backfilled in the backfill area;
and a drainage structure which is communicated with the drainage area and used for draining water is arranged in the drainage area corresponding to the water-rich karst cave.
And a broken stone reverse filtering layer is paved at the bottom of the water storage area.
The top of the water-rich karst cave is reinforced by anchor spraying support.
The drainage structure comprises a water diversion channel, a drainage branch hole and a flat diversion hole which are sequentially communicated with the drainage area.
The lower end of the water diversion channel is communicated with the drainage area, the upper end of the water diversion channel is communicated with the drainage branch hole, and the drainage branch hole has a slope inclined from the water diversion channel to the flat diversion hole.
The beneficial effects of the utility model are as follows: according to the utility model, the water-rich karst cave is separated by the concrete retaining wall and the concrete retaining wall, so that a backfill area penetrated by the tunnel is separated from water; the water storage area and the drainage area are communicated through the drainage pipeline, so that water entering the karst cave through the water inlet of the water-rich karst cave is drained to the drainage area from the water storage area through the drainage pipeline and is drained through the drainage structure.
The utility model comprises plugging, drainage, backfilling, drainage and reinforcement, and ensures stable drainage of the water flow of the karst cave by arranging a concrete retaining wall, a drainage pipeline, a drainage branch hole, a flat pilot hole and other combination modes; the safety of the tunnel bearing structure and the seepage-proofing structure is ensured by arranging a backfill structure, a system anchor spraying support, a concrete lining and other combination modes. The utility model realizes the timely discharge of the water flow of the water-rich karst tunnel, the bearing of the tunnel and the reinforcement of the seepage-proof structure, ensures the safety of tunnel formation and tunnel room, and ensures that the tunnel passes through quickly and smoothly.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment.
FIG. 2 is a schematic diagram of the internal partition of the water-rich karst cave in an embodiment.
1. A water-rich karst cave; 101. a water storage area; 102. backfilling the area; 103. a drainage area; 2. a concrete retaining wall; 3. a concrete retaining wall; 4. a drainage pipe; 401. a water discharge branch pipe; 5. a water diversion channel; 6. drainage branch holes; 7. a flat pilot hole; 8. a crushed stone reverse filtering layer; 9. and (5) a tunnel.
Detailed Description
As shown in fig. 1 and 2, the present embodiment is a tunnel passing structure passing through a water-rich karst cave, wherein the top of the water-rich karst cave is reinforced by anchor spraying support, three independent areas are formed in the water-rich karst cave by separation of a concrete retaining wall and a concrete retaining wall, the three independent areas are respectively water storage areas correspondingly communicated with a water inlet of the water-rich karst cave, backfill areas corresponding to the tunnel passing areas (namely, the tunnel passes through the karst cave from the backfill areas of the water-rich karst cave), and drainage areas corresponding to a water outlet of the water-rich karst cave.
In the embodiment, a broken stone reverse filtering layer is paved at the bottom of the water storage area; the backfill area is backfilled with concrete; the broken stone reversed filter area at the lower part of the water storage area is communicated with the drainage area through a drainage pipeline, and the drainage pipeline is also communicated with the upper area of the water storage area through a drainage branch pipe.
In this embodiment, a drainage structure is provided that communicates with the drainage area of the water-rich karst cave, and water in the drainage area is drained by the drainage structure. The drainage structure comprises a water diversion channel, a drainage branch hole and a flat diversion hole which are sequentially communicated with the drainage area, wherein the lower end of the water diversion channel is communicated with the drainage area, the upper end of the water diversion channel is communicated with the drainage branch hole, and the drainage branch hole has a gradient inclined from the water diversion channel to the flat diversion hole.
The construction method of the embodiment is as follows:
(1) Plugging device
And (3) carrying out anchor spraying net support on the top of the karst cave to prevent the top of the karst cave from falling or collapsing. And cleaning sludge, filler and the like in a cavity at the bottom of the karst cave at the position of the water inlet side of the water-rich karst cave, building a concrete retaining wall at the position above bedrock at the bottom of the karst cave, and intercepting and blocking water flow of the karst cave.
(2) Drainage system
And a drainage pipeline (phi 300 steel pipe) is paved from the water inlet side of the water-rich karst cave to the water outlet side of the karst cave. And a broken stone reverse filtering layer is paved between the concrete retaining wall and the cavity boundary (water storage area) of the karst cave at the water inlet side, and water flow is filtered through the broken stone reverse filtering layer, so that the blockage of a drainage pipeline is prevented.
(3) Backfilling
And cleaning cavity sludge and filler at the bottom of the karst cave in the backfill area range, backfilling with C30 concrete, and backfilling the bottom of the tunnel at the height region by 1-3 m, wherein the corresponding area of the tunnel is avoided during primary backfilling.
(4) Drainage water
And constructing a drainage branch hole and a water diversion channel from one side of a water outlet of the water-rich karst cave by utilizing the flat diversion hole, wherein the water diversion channel is connected with a drainage steel pipe, the gradient of the drainage branch hole is controlled to be 2%, and the water is deviated from water to flow and drain automatically.
Clearing cavity silt and filling materials at the bottom of a karst cave, building a concrete retaining wall at a position above bedrock at the bottom of the karst cave, forming a drainage area between the concrete retaining wall and the cavity boundary of the karst cave at the water outlet side, and enabling the concrete retaining wall to extend upwards to a position between a water diversion channel and a tunnel and between a drainage branch hole and the tunnel, so that the water flow of the drainage branch hole and the water diversion channel is prevented from flowing backwards into the tunnel, and the seepage prevention capacity of a main tunnel is improved.
(5) Reinforcing
After the water flow plugging, drainage and drainage structures of the karst cave are treated, tunnel excavation is carried out, system shotcrete support and reinforced concrete lining reinforcement of the tunnel are timely carried out after the tunnel excavation, the thickness of the lining is controlled to be 1-3 m, and concrete is poured into gaps between the outside of the tunnel and the backfill area.
The above embodiments are only for illustrating the inventive concept of the present utility model and not for limiting the protection of the claims of the present utility model, and all the insubstantial modifications of the present utility model using the concept shall fall within the protection scope of the present utility model.
Claims (5)
1. The utility model provides a pass through tunnel of rich water karst cave structure which characterized in that: the inside of the water-rich karst cave is divided into a water storage area, a backfill area and a drainage area by a concrete retaining wall and a concrete retaining wall;
the water storage area corresponds to the water inlet of the water-rich karst cave, the drainage area corresponds to the water outlet of the water-rich karst cave, and the water storage area is communicated with the drainage area through a drainage pipeline; the backfill area corresponds to a tunnel crossing area, and concrete is backfilled in the backfill area;
and a drainage structure which is communicated with the drainage area and used for draining water is arranged in the drainage area corresponding to the water-rich karst cave.
2. The tunnel passing structure passing through a water-rich karst according to claim 1, characterized in that: and a broken stone reverse filtering layer is paved at the bottom of the water storage area.
3. The tunnel passing structure passing through a water-rich karst according to claim 1, characterized in that: the top of the water-rich karst cave is reinforced by anchor spraying support.
4. The tunnel passing structure passing through a water-rich karst according to claim 1, characterized in that: the drainage structure comprises a water diversion channel, a drainage branch hole and a flat diversion hole which are sequentially communicated with the drainage area.
5. The tunnel passing structure crossing a water-rich karst cave according to claim 4, wherein: the lower end of the water diversion channel is communicated with the drainage area, the upper end of the water diversion channel is communicated with the drainage branch hole, and the drainage branch hole has a slope inclined from the water diversion channel to the flat diversion hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320101857.7U CN219034746U (en) | 2023-02-02 | 2023-02-02 | Tunnel passing structure penetrating through water-rich karst cave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320101857.7U CN219034746U (en) | 2023-02-02 | 2023-02-02 | Tunnel passing structure penetrating through water-rich karst cave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219034746U true CN219034746U (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320101857.7U Active CN219034746U (en) | 2023-02-02 | 2023-02-02 | Tunnel passing structure penetrating through water-rich karst cave |
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| CN (1) | CN219034746U (en) |
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2023
- 2023-02-02 CN CN202320101857.7U patent/CN219034746U/en active Active
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