Extra-long tunnel drainage pipeline capable of reducing crystallization blockage risk

Abstract

The utility model relates to the technical field of tunnel drainage, in particular to an extra-long tunnel drainage pipeline capable of reducing the risk of crystallization blockage, which comprises a first solvent box, a longitudinal blind pipe and a transverse water guide pipe, the longitudinal blind pipe is in an up-and-down fluctuating shape, the fluctuating angle is larger than the tunnel ramp angle, the longitudinal blind pipe comprises a high point and a low point, and the transverse water guide pipe is connected with the first solvent box. The high point is connected with the first dissolving agent box, and the low point is connected with the transverse water guide pipe. The longitudinal blind pipe is arranged in a fluctuating mode, the fluctuating angle is larger than the tunnel ramp angle, the speed of water flow in the longitudinal blind pipe is increased, the water flow is guided out by the transverse water guide pipe at each low point, the time that the water flow stays in the longitudinal blind pipe is shortened, and the risk that the longitudinal blind pipe is blocked is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of tunnel drainage technology, and in particular to an extra-long tunnel drainage pipe that can reduce the risk of crystallization blockage. Background Technology

[0002] Long tunnels in water-rich karst areas play a crucial role in transportation infrastructure construction. However, these areas have complex geological conditions, with groundwater rich in various minerals such as calcium and magnesium ions. Furthermore, substances like calcium hydroxide in the tunnel concrete and alumina clinker in the quick-setting agent can dissolve under long-term immersion in groundwater. These substances react with carbonate ions in the groundwater to form calcium carbonate, aluminate hydration products, and other slightly water-soluble compounds.

[0003] When water flows through the tunnel drainage pipe, the combined effects of temperature, humidity, and water flow velocity cause minerals in the water to easily crystallize and precipitate, adhering to the inner wall of the drainage pipe and gradually accumulating. This crystallization blockage not only reduces the effective cross-sectional area of ​​the drainage pipe, leading to poor drainage, but can even completely block the pipe, causing water accumulation inside the tunnel. The long-term presence of accumulated water will exert continuous water pressure on the tunnel lining structure, increasing the risk of leakage, cracking, deformation, and other defects, reducing the tunnel's durability and stability, and seriously threatening the normal operation of the tunnel and traffic safety.

[0004] Currently, longitudinal blind pipes in tunnels are typically single straight pipes or corrugated pipes, with an inclination rate consistent with the tunnel's longitudinal slope. Since the tunnel's longitudinal slope generally ranges from -3% to +3%, these blind pipes are very long, and their inclination rate rarely exceeds 3%. This results in slow water flow within the pipes, making them more prone to crystallization. Current methods for clearing drainage pipes in extremely long tunnels usually involve mechanical dredging or pipe replacement at the blockage point. However, mechanical dredging and pipe replacement are often very costly, complex to implement, and cannot completely clear the blockage. Furthermore, due to the rigid contact between the mechanical equipment and the pipe, the equipment is highly susceptible to damaging the pipe during the dredging process. Utility Model Content

[0005] The main purpose of this utility model is to provide a drainage pipe for extra-long tunnels that can reduce the risk of crystallization blockage, so as to solve the technical problem that extra-long tunnel drainage pipes are prone to crystallization and blockage, and that blockage is difficult to clear.

[0006] To achieve the above objectives, this utility model provides an extra-long tunnel drainage pipe that can reduce the risk of crystallization blockage, including a first solvent tank, a longitudinal blind pipe and a transverse water guide pipe. The longitudinal shape of the longitudinal blind pipe is an undulating shape with an undulation angle greater than the tunnel slope angle. The longitudinal blind pipe includes a high point and a low point. The high point is connected to the first solvent tank and the low point is connected to the transverse water guide pipe.

[0007] Furthermore, the longitudinal blind pipe is provided with several permeable holes for collecting water flow within the surrounding rock.

[0008] Furthermore, the longitudinal blind tube has a segmented structure, with adjacent segments of the longitudinal blind tube connected end-to-end at an angle.

[0009] More preferably, it also includes a connecting pipe, a first tee pipe and a second tee pipe, one end of the connecting pipe being connected to the first solvent tank, the first tee pipe connecting the other end of the connecting pipe and two adjacent longitudinal blind pipes, and the second tee pipe connecting the transverse water guide pipe and two adjacent longitudinal blind pipes.

[0010] More preferably, the extra-long tunnel includes a secondary lining structure, the secondary lining structure having an ear chamber and a connecting groove, the first solvent tank being fixed in the ear chamber, and the connecting pipe being fixed in the connecting groove.

[0011] More preferably, it also includes an initial support structure, wherein the initial support structure and the secondary lining structure at the location of the ear chamber are provided with protrusions, the protrusions protruding towards the surrounding rock.

[0012] More preferably, it also includes a first solvent inlet pipe, which is parallel to the axis of the extra-long tunnel, and the connecting pipe connects the first solvent tank and the first solvent inlet pipe, and the first solvent inlet pipe and the longitudinal blind pipe, respectively.

[0013] Preferably, it further includes an initial support structure, a second solvent tank, and a second solvent input pipe. The second solvent input pipe has several injection holes. The second solvent tank is connected to the second solvent input pipe, and the second solvent input pipe is fixedly connected to the initial support structure.

[0014] Preferably, it also includes a side drainage ditch and a central drainage ditch, wherein the central drainage ditch is lower in height than the side drainage ditch, and the side drainage ditch and the central drainage ditch are connected by the transverse water guide pipe.

[0015] More preferably, a drain pipe is provided in the central drainage ditch, and a sealing cap is provided in both the drain pipe and the transverse water guide pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this invention, the longitudinal blind pipe is designed with undulations at an angle greater than that of the tunnel slope, increasing the water flow velocity within the pipe. Furthermore, the water flow is diverted by transverse guide pipes at each low point, shortening the time the water remains within the pipe and significantly reducing the risk of blockage. Even if crystallization blockage occurs, the first solvent tank can be opened to inject solvent into the high point of the pipe to dissolve the crystals, simplifying the process of clearing the blockage, saving costs, and protecting the pipeline. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a partial structural diagram of the first solvent tank and the longitudinal blind tube in one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a partial side structure of an extra-long tunnel cross-section in one embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the bottom partial structure of an extra-long tunnel cross-section in one embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the second solvent tank and the second solvent input pipe in one embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection of the second solvent input tube in one embodiment of the present invention.

[0024] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0025] Explanation of icon numbers:

[0026] 1. First solvent tank; 2. Longitudinal blind pipe; 3. Transverse water guide pipe; 4. First solvent input pipe; 5. Connecting pipe; 6. Ear chamber; 7. Protrusion; 8. Drainage side ditch; 9. Central drainage ditch; 10. Drainage pipe; 11. Second solvent tank; 12. Second solvent input pipe; 13. Secondary lining structure; 14. Initial support structure; 15. First tee pipe; 16. Second tee pipe; 17. Sealing cap; 18. Hook. Detailed Implementation

[0027] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] Please see Figures 1 to 5 This embodiment provides an extra-long tunnel drainage pipe that can reduce the risk of crystallization blockage. It includes a first solvent tank 1, a longitudinal blind pipe 2, and a transverse water guide pipe 3. The longitudinal shape of the longitudinal blind pipe 2 is undulating, with an undulation angle greater than the tunnel slope angle. The longitudinal blind pipe 2 includes a high point and a low point. The high point is connected to the first solvent tank 1, and the low point is connected to the transverse water guide pipe 3. The undulating design of the longitudinal blind pipe 2, with an undulation angle greater than the tunnel slope angle, increases the water flow velocity within the longitudinal blind pipe 2. Furthermore, the water flow is diverted by the transverse water guide pipe 3 at each low point, shortening the time the water remains within the longitudinal blind pipe 2 and significantly reducing the risk of blockage. Even if crystallization blockage occurs in the longitudinal blind pipe 2, the first solvent tank 1 can be opened to inject solvent into the high point of the longitudinal blind pipe 2 to dissolve the crystals, thus simplifying the process of clearing the blockage, saving costs, and protecting the pipeline.

[0032] like Figure 1As shown, in one embodiment, the longitudinal blind pipe 2 is provided with several permeable holes for collecting water flow within the surrounding rock. Water seeping from the surrounding rock flows into the longitudinal blind pipe 2 through these permeable holes, improving the drainage capacity of the extra-long tunnel and preventing water seepage into the secondary lining structure 13, which could cause leakage, cracking, or other damage to the extra-long tunnel. This enhances the durability and stability of the extra-long tunnel.

[0033] In this embodiment, as a further preferred embodiment, the longitudinal blind pipe 2 has a segmented structure, with adjacent segments of the longitudinal blind pipe 2 connected end-to-end at an angle. The extra-long tunnel drainage pipe also includes a connecting pipe 5, a first tee pipe 15, and a second tee pipe 16. One end of the connecting pipe 5 is connected to the first solvent tank 1, the first tee pipe 15 connects the other end of the connecting pipe 5 to the two adjacent segments of the longitudinal blind pipe 2, and the second tee pipe 16 connects the transverse water guide pipe 3 to the two adjacent segments of the longitudinal blind pipe 2. The segmented manufacturing and undulating splicing of the longitudinal blind pipe 2 reduces the manufacturing difficulty of the longitudinal blind pipe 2, and the connection through the tee pipes improves the stability of the splicing between the connecting pipe 5 and the longitudinal blind pipe 2, preventing water leakage during drainage.

[0034] When a blockage occurs, the solvent flows from the connecting pipe 5 into the longitudinal blind pipe 2 by blocking the transverse water pipe 3. The solvent stays in the longitudinal blind pipe 2 and reacts fully with the blockage crystals to dissolve the crystals, thus completing the unblocking of the longitudinal blind pipe 2.

[0035] In one embodiment, please participate Figure 2 More preferably, the extra-long tunnel includes a secondary lining structure 13, within which are provided a side chamber 6 and a connecting groove. The side chamber 6 has dimensions of 60×33×60cm (length×width×height) and can be sealed using a baffle or similar structure. The first solvent tank 1 is fixed inside the side chamber 6, and the connecting pipe 5 is fixed inside the connecting groove. After the connecting pipe 5 is fixed, the connecting groove is backfilled with concrete. Placing the first solvent tank 1 inside the side chamber 6 prevents it from intruding into the driving space inside the extra-long tunnel, thus avoiding damage and leakage. The side chamber 6 communicates with the internal space of the extra-long tunnel, facilitating timely replenishment of the solvent by technicians and allowing water to be poured into the first solvent tank 1 to verify whether the longitudinal blind pipe 2 has been cleared.

[0036] In this embodiment, as a further step, the extra-long tunnel also includes an initial support structure 14. The initial support structure 14 and the secondary lining structure 13 at the location of the side chamber 6 are provided with a protrusion 7, which protrudes towards the surrounding rock. In water-rich karst areas, groundwater is abundant and the water pressure is high. Since the side chamber 6 is directly excavated on the secondary lining structure 13, the location of the side chamber 6 will become a weak point, and the secondary lining structure 13 is highly likely to be cracked by the water pressure, causing water leakage inside the tunnel. Therefore, the initial support structure 14 and the secondary lining structure 13 at the side chamber 6 need to be excavated outwards to ensure that the thickness of the initial support structure 14 and the secondary lining structure 13 meets the original design thickness, ultimately forming the protrusion 7.

[0037] In one embodiment, such as Figure 1 As shown, the extra-long tunnel also includes a first solvent input pipe 4, which is parallel to the axis of the extra-long tunnel. The connecting pipe 5 connects the first solvent tank 1 and the first solvent input pipe 4, as well as the first solvent input pipe 4 and the longitudinal blind pipe 2. The longitudinal length of the first solvent input pipe 4 is the same as the longitudinal length of the longitudinal blind pipe 2. After the solvent flows into the first solvent input pipe 4, it is then distributed to various high points of the longitudinal blind pipe 2. This reduces the number of first solvent tanks 1 required, saves costs, and simplifies the operation process of replenishing the solvent in the first solvent tank 1.

[0038] Preferably, the arrangement spacing of the multiple first solvent tanks 1 is preferably 20m, the diameter of the connecting pipe 5 and the first solvent input pipe 4 is 75mm, and the slope of the first solvent input pipe 4 is consistent with the longitudinal slope of the extra-long tunnel.

[0039] See Figure 4 and Figure 5 In one embodiment, preferably, a second solvent tank 11 and a second solvent inlet pipe 12 are provided. The second solvent inlet pipe 12 is provided with several injection holes. The second solvent tank 11 is connected to the second solvent inlet pipe 12, and the second solvent inlet pipe 12 is fixedly connected to the initial support structure 14 by a hook 18. The second solvent tank 11 is set at a high position outside the extra-long tunnel. The solvent flows into the second solvent inlet pipe 12, and the several injection holes on the second solvent inlet pipe 12 inject the solvent into the surrounding rock of the extra-long tunnel, neutralizing the overall water environment of the surrounding rock and reducing the risk of crystallization blockage of the drainage pipe of the extra-long tunnel from the source.

[0040] Preferably, such as Figure 3As shown, the system also includes a side drainage ditch 8 and a central drainage ditch 9. The central drainage ditch 9 is lower than the side drainage ditch 8, and the side drainage ditch 8 and the central drainage ditch 9 are connected by the transverse water guide pipe 3. A drain pipe 10 is installed inside the central drainage ditch 9, and both the drain pipe 10 and the transverse water guide pipe 3 are fitted with sealing caps 17. The side drainage ditch 8 and the central drainage ditch 9 are designed to receive water flowing from the transverse water guide pipe 3. The drain pipe 10 in the central drainage ditch 9 discharges the water flowing from the central drainage ditch 9 back into the ground to maintain the local groundwater ecosystem, improve the drainage capacity of the long tunnel, and reduce the risk of crystallization blockage. The drain pipe 10 extends 1.0m into the surrounding rock. The drain pipe 10 is a 110mm diameter PVC pipe with a perforated section at the bottom 0.5m, wrapped with non-woven fabric. The top of the drain pipe 10 extends 20cm above the bottom elevation of the central drainage ditch 9 but is lower than the elevation of the longitudinal blind pipe 2. The end of the drain pipe 10 is perforated and wrapped with non-woven fabric to improve drainage while preventing soil blockage. The sealing cap 17 is designed to seal the transverse water guide pipe 3 and the drain pipe 10 when blockage occurs in the drainage pipe of the extra-long tunnel, allowing the solvent to fully react with the blockage crystals inside the drainage pipe of the extra-long tunnel.

[0041] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A long tunnel drainage pipe capable of reducing the risk of crystallization clogging, characterized by, The application relates to a long tunnel, which comprises a first dissolving agent tank, a longitudinal blind pipe and a transverse water guide pipe, the longitudinal blind pipe has an up-and-down undulating shape in the longitudinal direction, the undulating angle is larger than the tunnel ramp angle, the longitudinal blind pipe comprises a high point and a low point, the high point is connected with the first dissolving agent tank, and the low point is connected with the transverse water guide pipe.

2. The jumbo tunnel sewer according to claim 1, wherein, A plurality of water-permeable holes are arranged on the longitudinal blind pipe and used for collecting water flow in surrounding rocks.

3. The jumbo tunnel sewer according to claim 1, wherein, The longitudinal blind pipe has a sectional structure, and two adjacent longitudinal blind pipes are connected in an angle.

4. The jumbo tunnel sewer according to claim 3, wherein, The application further comprises a connecting pipe, a first three-way pipe and a second three-way pipe, one end of the connecting pipe is connected with the first dissolving agent tank, the first three-way pipe is connected with the other end of the connecting pipe and two adjacent longitudinal blind pipes, and the second three-way pipe is connected with the transverse water guide pipe and two adjacent longitudinal blind pipes.

5. The super-long tunnel sewer according to claim 4, wherein, The long tunnel comprises a secondary lining structure, an ear chamber and a connecting groove are arranged in the secondary lining structure, the first dissolving agent tank is fixed in the ear chamber, and the connecting pipe is fixed in the connecting groove.

6. The super-long tunnel sewer according to claim 5, wherein, The application further comprises a primary support structure, the primary support structure and the secondary lining structure at the position of the ear chamber are provided with a convex part, and the convex part protrudes towards the surrounding rocks.

7. The super-long tunnel sewer according to claim 4, wherein, The application further comprises a first dissolving agent input pipe, the first dissolving agent input pipe is parallel to the axis of the long tunnel, and the connecting pipe is connected with the first dissolving agent tank and the first dissolving agent input pipe, the first dissolving agent input pipe and the longitudinal blind pipe respectively.

8. The long-span tunnel sewer according to claim 1, wherein, The application further comprises a primary support structure, a second dissolving agent tank and a second dissolving agent input pipe, a plurality of liquid injection holes are arranged on the second dissolving agent input pipe, the second dissolving agent tank is connected with the second dissolving agent input pipe, and the second dissolving agent input pipe is fixedly connected with the primary support structure.

9. The long-span tunnel sewer according to claim 1, wherein, The application further comprises a drainage side ditch and a drainage central ditch, the drainage central ditch is lower than the drainage side ditch, and the drainage side ditch and the drainage central ditch are connected through the transverse water guide pipe.

10. The jumbo tunnel sewer according to claim 9, wherein, A drain pipe is arranged in the drainage central ditch, and the drain pipe and the transverse water guide pipe are provided with a blocking cover.

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