Dredging and overhauling structure of giant inverted siphon tunnel
By setting up drainage and barrier structures in the giant inverted siphon tunnel, an independent water pumping channel is formed, which solves the problem of high difficulty in dredging and maintenance caused by large water level fluctuations and achieves efficient dredging and maintenance results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-04-07
AI Technical Summary
The large fluctuations in water level and the difficulty of pumping out the water during the dredging and maintenance of the giant inverted siphon tunnel make the dredging, maintenance and maintenance very difficult, and the pumping equipment occupies the passage and affects efficiency.
Drainage and retaining structures are installed at the lowest point of the inverted siphon tunnel to form an independent water pumping channel. The water is pumped to the ground using drainage shafts and horizontal drainage tunnels in conjunction with pumping equipment. After the pumping is completed, the construction adit is used as a maintenance channel to prevent silt from entering the pumping channel.
It achieves efficient drainage of accumulated water, reduces maintenance difficulty, improves dredging efficiency, avoids drainage equipment occupying maintenance passages, and reduces the impact on other equipment.
Smart Images
Figure CN224092340U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to water conservancy engineering technical field especially a kind of desilting overhaul structure of giant inverted siphon tunnel, it is applicable to the desilting overhaul of giant inverted siphon tunnel. BACKGROUND
[0002] When flood diversion tunnel meets railway, highway, national road and other tunnels or other buildings, inverted siphon type underpass arrangement needs to be used, and when giant inverted siphon tunnel diverts flood, certain sediment accumulation will be generated in the tunnel, and at the same time, water in the inverted siphon tunnel needs to be pumped out during maintenance. During desilting and maintenance of the inverted siphon tunnel, water in the traffic tunnel is generally pumped out, but the giant inverted siphon tunnel has the problems of large amount of water storage, large water level fluctuation, large pumping difficulty and low efficiency, and the pumping equipment occupies part of the desilting channel, thereby causing great difficulty in maintenance of the desilting and maintenance of the inverted siphon tunnel. SUMMARY
[0003] The utility model solves the technical problems in the above-mentioned problems, and provides a kind of desilting overhaul structure of giant inverted siphon tunnel.
[0004] The utility model employs the technical scheme that a kind of desilting overhaul structure of giant inverted siphon tunnel, comprising:
[0005] The drainage structure is connected to the lowest point of the horizontal section of the inverted siphon tunnel at the input end, and is connected to the ground at the output end, so that the accumulated water in the inverted siphon tunnel can flow into the internal drainage structure to provide a pumping channel for the accumulated water;
[0006] The blocking structure is arranged at the connection between the drainage structure and the inverted siphon tunnel, and can block the sediment accumulated in the internal inverted siphon tunnel from entering the internal drainage structure;
[0007] The maintenance structure is connected to the horizontal section of the inverted siphon tunnel at the input end, and is connected to the ground at the output end, to provide a desilting channel for the maintenance of the inverted siphon tunnel.
[0008] Through the above technical means, the drainage structure is used to introduce the accumulated water in the inverted siphon tunnel, and the pumping equipment can form a separate drainage channel, the blocking structure can block the sediment in the inverted siphon tunnel from entering the internal drainage structure, and after the pumping of the accumulated water in the inverted siphon tunnel is completed, the maintenance structure is used to enter the inverted siphon tunnel for desilting and maintenance operation, thereby effectively reducing the difficulty of maintenance of the inverted siphon tunnel.
[0009] In some embodiments, the drainage structure includes a horizontal drainage tunnel, a drainage vertical shaft and a steel grating cover plate, the horizontal drainage tunnel is arranged horizontally, one end of the horizontal drainage tunnel is connected to the lowest point of the horizontal section of the inverted siphon tunnel, the other end of the horizontal drainage tunnel is connected to the bottom of the vertically arranged drainage vertical shaft, the top of the drainage vertical shaft is connected to the ground and corresponds to the installed steel grating cover plate.
[0010] In some embodiments, the barrier structure comprises a barrier ridge, which is arranged inside the horizontal drainage hole and at the joint of the horizontal drainage hole and the inverted siphon tunnel.
[0011] In some embodiments, the barrier structure further comprises a communication pipe and a geotextile, the communication pipe is arranged through the inner bottom of the barrier ridge, the two ends of the communication pipe are respectively communicated with the inverted siphon tunnel and the horizontal drainage hole, and the end of the communication pipe close to the inverted siphon tunnel is wrapped with the geotextile.
[0012] In some embodiments, the cross section of the barrier ridge is in a trapezoidal structure, the vertical surface of the barrier ridge faces the sediment side, and the inclined surface of the barrier ridge faces away from the sediment side.
[0013] In some embodiments, the inspection channel is a construction adit combining permanent and temporary structures.
[0014] The utility model discloses the beneficial effects are:
[0015] The horizontal drainage hole and the drainage shaft at the lowest point of the inverted siphon tunnel are additionally arranged as independent permanent drainage channels, and the barrier structure is arranged to prevent the sediment in the tunnel from entering the horizontal drainage hole, so that the accumulated water in the inverted siphon tunnel can be naturally introduced into the inside of the drainage structure, and the accumulated water in the inverted siphon tunnel can be conveniently pumped out to the nearby water system by cooperating with the pumping and draining equipment. The pumping and draining equipment does not occupy the internal channel of the inverted siphon tunnel, and after pumping and draining, the construction adit is used as the inspection channel, so that personnel and mechanical equipment can enter the tunnel to carry out dredging maintenance. In the structure, the drainage and dredging inspection are arranged separately and do not interfere with each other, the inspection efficiency is improved, and the difficulty of dredging maintenance of the inverted siphon tunnel is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0016] Fig. 1 It is a structural schematic diagram of the application.
[0017] Fig. 2 It is a structural schematic diagram of another view in the application.
[0018] Fig. 3 It is a layout structural schematic diagram of the barrier structure in the application.
[0019] Fig. 4 It is a cross-sectional structural schematic diagram of the barrier ridge in the application.
[0020] BRIEF DESCRIPTION OF DRAWINGS:
[0021] 1, inverted siphon tunnel; 2, horizontal drainage hole; 3, drainage shaft; 4, steel grating cover plate; 5, ground; 6, construction adit; 7, barrier ridge; 8, communication pipe; 9, geotextile.
[0022] This specification includes references to “one embodiment” or “an embodiment.” The appearance of the phrases “in one embodiment” or “in an embodiment” does not necessarily refer to the same embodiment. Particular features, structures, or characteristics can be combined in any suitable way.
[0023] “includes”, this term is open. As used in the appended claims, this term does not exclude additional structures or steps. DETAILED DESCRIPTION
[0024] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme of the present application will be further described in conjunction with specific embodiments.
[0025] In conjunction with Figs. 1 to 4 As shown in the drawings, the embodiment is a silt cleaning and maintenance structure of an inverted siphon tunnel, which comprises a drainage structure, a blocking structure and a maintenance structure. The input end of the drainage structure is communicated with the lowest point of the horizontal section of the inverted siphon tunnel 1, and the output end is communicated with the ground 5, so that the accumulated water in the inverted siphon tunnel 1 can flow into the inside of the drainage structure to provide a drainage channel for the accumulated water. The blocking structure is arranged at the connection between the drainage structure and the inverted siphon tunnel 1, and the blocking structure can prevent the accumulated silt in the inverted siphon tunnel 1 from entering the inside of the drainage structure. The input end of the maintenance structure is communicated with the horizontal section of the inverted siphon tunnel 1, and the output end of the maintenance structure is communicated with the ground 5. The maintenance structure is used to provide a cleaning and maintenance channel for the inverted siphon tunnel 1.
[0026] In some embodiments, the drainage structure comprises a horizontal drainage tunnel 2, a drainage vertical shaft 3 and a steel grating cover plate 4. The horizontal drainage tunnel 2 is arranged horizontally, one end of the horizontal drainage tunnel 2 is connected to the lowest point of the horizontal section of the inverted siphon tunnel 1, the other end of the horizontal drainage tunnel 2 is connected to the bottom of the drainage vertical shaft 3 which is arranged vertically, the top of the drainage vertical shaft 3 is communicated with the ground 5 and the steel grating cover plate 4 is installed correspondingly. The steel grating cover plate 4 is normally kept closed to prevent external debris from entering, which not only ensures the safe closed state in normal times, but also can be opened for convenient operation during maintenance.
[0027] In some embodiments, the blocking structure comprises a blocking ridge 7, which is arranged inside the horizontal drainage tunnel 2 and located at the joint between the horizontal drainage tunnel 2 and the inverted siphon tunnel 1. Specifically, in this embodiment, the elevation of the blocking ridge 7 is higher than the elevation of the silt accumulated in the tunnel, and in actual engineering, the elevation of the blocking ridge 7 is set according to the maintenance frequency of the inverted siphon tunnel 1 and the elevation of the silt at the bottom.
[0028] Further, the blocking structure further comprises a communication pipe 8 and a geotextile 9. The communication pipe 8 penetrates the inner bottom of the blocking ridge 7, the two ends of the communication pipe 8 are respectively communicated with the inverted siphon tunnel 1 and the horizontal drainage tunnel 2, and the end of the communication pipe 8 close to the inverted siphon tunnel 1 is wrapped with the geotextile 9.
[0029] By arranging the communicating pipe to communicate the inverted siphon tunnel 1 and the drainage horizontal tunnel 2, part of the water body can be allowed to pass through the geotextile 9 to enter the internal pipeline after filtration, so as to adjust the water level difference inside and outside, balance the water pressure of the inverted siphon tunnel 1 and the drainage horizontal tunnel 2, and reduce the structural damage caused by excessive water pressure. At the same time, the geotextile 9 can prevent the silt from entering the drainage horizontal tunnel 2 through the communicating pipe 8.
[0030] Further, the cross section of the check dam 7 is in a trapezoidal structure in the embodiment, the vertical surface of the check dam 7 faces the silt side, and the slope surface of the check dam 7 faces away from the silt side. The vertical surface of the check dam 7 facing the silt side can block the direct scouring of the silt, reduce the erosion of the silt to the check dam 7, and improve the service life. The slope surface of the check dam 7 facing away from the silt side can guide the water flow to pass through, and the trapezoidal structure can better resist the pressure of the silt and effectively reduce the impact force of the water flow on the check dam 7.
[0031] In some embodiments, the maintenance channel adopts a construction adit 6 combined with permanent and temporary structures, and the construction adit 6 can provide convenient conditions for long-term maintenance.
[0032] The implementation principle of the silt removal and maintenance structure of the inverted siphon tunnel in the embodiment is as follows:
[0033] The inverted siphon tunnel has the characteristics of small water head, large flow, large cross-sectional size, large burial depth, and small internal water pressure, and it is difficult to realize automatic silt removal and drainage, and it needs to rely on external mechanical drainage. The structure sets the drainage horizontal tunnel 2, the drainage vertical shaft 3 and the check dam 7 at the lowest point of the inverted siphon tunnel 1, the accumulated water in the inverted siphon tunnel 1 converges at the lowest point and is naturally guided to the drainage horizontal tunnel 2 through the check dam 7, the drainage horizontal tunnel 2 and the drainage vertical shaft 3 are used as a permanent pumping channel, and pumping equipment (such as a water pump) can be reasonably arranged in the pumping channel to pump the accumulated water to the nearby water system, which not only reduces the influence on the silt removal road, but also effectively reduces the accumulated water in the inverted siphon tunnel 1 and improves the drainage efficiency. After the pumping work is completed, the construction adit 6 is used as a maintenance channel, which can facilitate the personnel and equipment to enter and exit. The drainage and silt removal and maintenance in the structure are arranged separately and do not interfere with each other, and since the traffic tunnel does not need to be frequently occupied for water pumping and silt removal operations, the influence on the normal use of other equipment is reduced.
[0034] The above are preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: any equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.
Claims
1. A dredging and maintenance structure for a giant inverted siphon tunnel, characterized in that, include: The drainage structure has its input end connected to the lowest point of the horizontal section of the inverted siphon tunnel (1) and its output end connected to the ground (5), so that the water in the inverted siphon tunnel (1) can flow into the drainage structure to provide a drainage channel for the water. The barrier structure is located at the connection between the drainage structure and the inverted siphon tunnel (1) and can prevent the sediment accumulated inside the inverted siphon tunnel (1) from entering the drainage structure. The maintenance structure has an input end connected to the horizontal section of the inverted siphon tunnel (1) and an output end connected to the ground (5), which is used to provide a maintenance and dredging channel for the inverted siphon tunnel (1).
2. The dredging and maintenance structure for a giant inverted siphon tunnel according to claim 1, characterized in that: The drainage structure includes a horizontal drain hole (2), a vertical drain shaft (3), and a steel grating cover (4). The horizontal drain hole (2) is arranged horizontally. One end of the horizontal drain hole (2) is connected to the lowest point of the horizontal section of the inverted siphon tunnel (1), and the other end of the horizontal drain hole (2) is connected to the bottom of the vertical drain shaft (3). The top of the drain shaft (3) is connected to the ground (5) and a steel grating cover (4) is installed thereon.
3. The dredging and maintenance structure for a giant inverted siphon tunnel according to claim 2, characterized in that: The barrier structure includes a barrier sill (7), which is located inside the horizontal drainage tunnel (2) and at the junction of the horizontal drainage tunnel (2) and the inverted siphon tunnel (1).
4. The dredging and maintenance structure for a giant inverted siphon tunnel according to claim 3, characterized in that: The barrier structure also includes a connecting pipe (8) and geotextile (9). The connecting pipe is installed at the bottom of the barrier sill (7). The two ends of the connecting pipe are connected to the inverted siphon tunnel (1) and the horizontal drainage tunnel (2), respectively. The end of the connecting pipe near the inverted siphon tunnel (1) is wrapped with geotextile.
5. The dredging and maintenance structure for a giant inverted siphon tunnel according to claim 3, characterized in that: The cross-section of the retaining wall (7) is trapezoidal, with the vertical surface of the retaining wall (7) facing the mud and sand side and the sloping surface of the retaining wall (7) facing away from the mud and sand side.
6. The dredging and maintenance structure for a giant inverted siphon tunnel according to claim 1, characterized in that: The maintenance structure adopts a construction adit (6) that combines permanent and temporary structures.