A drainage system and construction method for highway tunnels

Abstract

This invention discloses a drainage system and construction method for highway tunnels, belonging to the field of highway tunnel technology. The system includes a main drainage pipe installed within the tunnel sidewall lining and arranged along the tunnel's length, and blind drainage pipes arranged circumferentially along the tunnel sidewall, with their openings connected to the main drainage pipe. A guide pipe is installed on the main drainage pipe to direct water into a drainage ditch. Multiple sealing heads are installed within the main drainage pipe, either in a connected or disconnected state from the inner wall. When the sealing heads are connected to the inner wall of the main drainage pipe, they simultaneously seal the openings of the guide pipes, thus isolating the inner cavity of the main drainage pipe into multiple independent spaces. The sealing heads are connected to an inhibitor supply port to introduce the inhibitor. The inhibitor can penetrate into various gaps within the tunnel waterproofing system, dissolving deposited salt and effectively clearing blockages. This ensures the safety of the entire drainage system of the highway tunnel, extends the tunnel's service life, and reduces maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of highway tunnel technology, and more specifically, to a highway tunnel drainage system and construction method. Background Technology

[0002] When highways cross mountains or other obstacles, they often use tunnels. During actual construction, it is necessary to carry out waterproofing and drainage work in the later stages of tunnel construction to improve the service life of the tunnel. Furthermore, the construction quality of the tunnel's waterproofing and drainage structure has a significant impact on the thickness of the lining concrete, which in turn affects the service life of the lining structure.

[0003] According to geological lithology classification, soft rock refers to a general term for loose, fractured, weak, and weathered expansive rock masses with a uniaxial compressive strength of less than 25 MPa. These rocks are mostly low-strength rocks such as mudstone, shale, siltstone, and argillaceous claystone, and are naturally formed complex geological media. After tunnel excavation, due to the low strength and poor self-stability of soft surrounding rock, stress will redistribute, resulting in a large loosening zone around the tunnel. The construction of tunnels in soft surrounding rock is significantly affected by geological conditions and is further complicated by factors such as large cross-sections, shallow burial depths, and crossing existing roads or buildings. Some existing tunnel projects have discovered small ditches and an F3 fault zone nearby during construction. Using existing tunnel construction methods directly under these geological conditions allows surface water to seep into the tunnel along the fault, easily causing rain-like water seepage during excavation and leading to severe water seepage inside the tunnel, affecting the construction quality.

[0004] Chinese patent application CN109611150A discloses a tunnel waterproofing and drainage structure and method. The patent includes a tunnel arch wall composed of an initial support layer, a waterproof membrane layer, and a secondary cast-in-place lining layer sequentially arranged on the wall of an excavated tunnel. Longitudinal side ditches are provided on both sides of the lining structure at the bottom of the excavated tunnel. A longitudinal blind pipe is buried at the bottom of the tunnel arch wall, with both ends of the blind pipe bent inwards and connected to the side ditches. A circumferential drainage blind pipe is spaced between the initial support layer and the waterproof membrane layer, and / or circumferential drainage boards are provided on both sides of the construction joint. The two ends of the circumferential drainage boards and / or the circumferential drainage blind pipes are connected to the corresponding longitudinal blind pipes. A transverse spare drain pipe is also provided at the bottom of the tunnel arch wall, with its outer end connected to the corresponding side ditch and its inner end located within the initial support layer.

[0005] The aforementioned patent-disclosed solutions, as relatively mature existing drainage systems, can effectively drain tunnels in mountainous highways. However, due to the geological conditions of the tunnels, the groundwater seeping into the surrounding rock and lining structure is rich in calcium, magnesium, and iron ions. These free ions and various hydrochloric acid ions remaining in the drainage system form salt aggregates that are difficult to dissolve on their own. These aggregates accumulate in the gaps between the sidewall drainage blind pipes and drainage membranes in the drainage system, making it prone to drainage blockage after one to two years of tunnel use. This is a problem that needs to be considered in the construction of tunnel drainage systems. Summary of the Invention

[0006] To address the problem of easy clogging between components in the drainage system due to the formation of salt polymers, this solution provides a highway tunnel drainage system and construction method to prevent the formation of these salt polymers, effectively clear the clogging problem, ensure the safety of the entire drainage system of the highway tunnel, improve the service life of the tunnel, and reduce maintenance costs.

[0007] To achieve the above objectives, the technical solution provided by the present invention is as follows: On one hand, the present invention provides a highway tunnel drainage system, comprising: A drainage main pipe is installed inside the tunnel sidewall lining and arranged along the length of the tunnel. A blind drainage pipe is arranged along the circumferential direction of the tunnel sidewall, and its opening is connected to the main drainage pipe. A water guide pipe is installed on the main drainage pipe to guide the water in the main drainage pipe to the drainage ditch; The main drainage pipe is equipped with several sealing heads, which are either connected to or separated from the inner wall of the main drainage pipe. When the sealing head is connected to the inner wall of the main drainage pipe, it seals the inlet of the water pipe to isolate the inner cavity of the main drainage pipe into multiple independent spaces. The sealing head is connected to the blocking agent supply port, which introduces blocking agent into the independent spaces.

[0008] Furthermore, the plugging head includes a discharge pipe, which is a variable diameter pipe with inlets and outlets on its wall, and the inlets and outlets are strip-shaped; the discharge pipe is connected to a variable diameter driving unit, which drives the discharge pipe to either increase or decrease its diameter, and one end of the discharge pipe is connected to the blocking agent supply port.

[0009] Furthermore, an expansion ring is provided at one end of the outlet pipe, and the expansion ring is arranged coaxially with the core of the outlet pipe; when the diameter of the outlet pipe increases, the diameter of the expansion ring increases and it abuts against and seals against the inner wall of the main drainage pipe; when the diameter of the outlet pipe decreases, the diameter of the expansion ring decreases and the main drainage pipe forms a connected pipeline; an extended sealing baffle is provided on the outer wall of the expansion ring, and the extended sealing baffle forms abutment or separation fit with the outlet of the water guide pipe.

[0010] Furthermore, a first coupling plate and a second coupling plate are respectively provided at both ends of the outlet tube. A guide slide rod is provided on the second coupling plate. The other end of the guide slide rod is slidably engaged with the first coupling plate. A return spring is sleeved on the guide slide rod. The two ends of the return spring abut against the surfaces of the first coupling plate and the second coupling plate, respectively.

[0011] Furthermore, a first sliding bracket is provided in the radial direction of the second coupling disc, a guide sliding hole is provided in the length direction of the first sliding bracket, and a second sliding bracket is provided on the expansion ring, the second sliding bracket slidingly engaging with the guide sliding hole.

[0012] Furthermore, the variable diameter drive unit includes a drive wire disposed on the end face of the first coupling plate. The drive wire passes through the central hole and the outlet tube of the first coupling plate and extends out from the second coupling plate. The extended end of the drive wire is connected to the tensioning unit. The tensioning unit drives the first coupling plate to slide along the guide slide rod through the drive wire.

[0013] Furthermore, the first combined disc core is nested with a guide slide tube and a guide pull tube. The extended end of the guide slide tube is a closed blind tube with a guide opening on the tube wall. One end of the guide pull tube is connected to or cut off from the guide opening.

[0014] Furthermore, a fine-tuning rotation mechanism is provided on the outlet pipe. When the variable diameter drive unit drives the two ends of the outlet pipe to approach each other, the fine-tuning rotation mechanism causes the expansion ring and the extended sealing baffle to rotate, and causes the extended sealing baffle to abut against the joint of the water guide pipe and the main drainage pipe.

[0015] Furthermore, the fine-tuning rotation mechanism includes a fine-tuning sleeve disposed on the outer wall of the guide tube, a support sleeve extending from the first connecting disc core, a spiral groove disposed on the outer wall of the fine-tuning sleeve, and a lever disposed on the inner wall of the support sleeve, the lever extending into the spiral groove.

[0016] On the other hand, the present invention provides a construction method for a highway tunnel drainage system, comprising: A main drainage pipe is laid inside the tunnel sidewall lining, and blind drainage pipes are arranged in the circumferential direction of the tunnel sidewall, connecting the openings of the main drainage pipe and the blind drainage pipes. A drainage strip is installed between the tunnel sidewall lining and the tunnel inner wall, with the lower end of the drainage strip connected to the main drainage pipe. Connect a water pipe to the main drainage pipe, with the other end of the water pipe extending into the drainage ditch; Multiple plugs are installed inside the main drainage pipe. The plugs are connected to the blocking agent supply port, and the blocking agent is introduced into the main drainage pipe through the outlet pipe of the plug. The drainage system is any of the highway tunnel drainage systems described above.

[0017] Compared with the prior art, the technical solution provided by this invention has the following advantages: (1) The drainage system of the present invention includes a sealing head installed inside the main drainage pipe. Multiple sealing heads are spaced apart along the length of the main drainage pipe. When the sealing head is combined with the inner wall of the main drainage pipe, the sealing head seals the inlet of the water pipe. Adjacent sealing heads isolate the inner cavity of the main drainage pipe into an independent space. The blocking agent is introduced into the main drainage pipe through the blocking agent supply port, so that the blocking agent can effectively enter the gaps in the tunnel waterproofing system, thereby achieving the purpose of dissolving the deposited salt, effectively cleaning the blockage problem, ensuring the safety of the entire drainage system of the highway tunnel, improving the service life of the tunnel, and reducing maintenance costs.

[0018] (2) During construction, the main drainage pipe is pre-embedded between the tunnel lining and the inner sidewall. The blind drainage pipe extends along the circumferential direction of the tunnel sidewall. The opening of the main drainage pipe and the blind drainage pipe are connected, so that the water in the tunnel can enter the main drainage pipe through the blind drainage pipe and be discharged into the drainage ditch through the water guide pipe set on the main drainage pipe to implement the drainage of the water. Attached Figure Description

[0019] Figure 1 This is a cross-sectional schematic diagram of the drainage system of a highway tunnel located inside the tunnel; Figure 2 and Figure 3 These are schematic diagrams of a single unit structure in a highway tunnel drainage system from two different perspectives. Figure 4 This is a schematic diagram of the planar structure of the plug head; Figure 5 and Figure 6 These are schematic diagrams of the plugging head from two different perspectives; Figure 7 and Figure 8 These are schematic diagrams of two perspectives showing a partial cross-sectional structure of the plugging head; Figure 9 This is a schematic diagram of the structure of the sealing head after the extended sealing baffle is removed; Figure 10 This is a schematic diagram showing the connection between the guide tube in the sealing head and the support sleeve in the first connecting plate.

[0020] Label Explanation: 100. Main drain pipe; 110. Water guide pipe; 120. Connecting sleeve; 121. Connecting interface; 200. Drainage blind pipe; 210. Water connection pipe; 300. Sealing head; 310. Outlet pipe; 311. Inlet / outlet; 320. Expansion ring; 321. Extended sealing baffle; 322. Second sliding bracket; 323. Guide roller; 330. First connecting plate; 3301. Support sleeve; 3302. Lever; 3303. First guide wheel; 331. Guide rail; 332. Hook plate; 333. Drive wire; 334. Rotating connector; 335. Pull rope; 336. Tension bracket; 337. Mounting bracket; 339. Guide slide tube; 340. Second connecting plate; 341. Guide slide rod; 342. Return spring; 343. First sliding bracket; 3431. Guide slide hole; 344. Second guide wheel; 345. Third guide wheel; 350. Pull tube; 351. Fine-tuning sleeve; 3511. Spiral groove; 400. Drainage ditch; 500. Drainage belt. Detailed Implementation

[0021] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0022] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0023] The following is in conjunction with the appendix Figures 1 to 10 The following is a detailed description of the highway tunnel drainage system of the present invention: like Figure 1 As shown, the highway tunnel drainage system includes a main drainage pipe 100, which is installed inside the tunnel sidewall lining and arranged along the tunnel length direction; and a blind drainage pipe 200, which is arranged along the circumferential direction of the tunnel sidewall. Multiple sets of blind drainage pipes 200 can be installed at intervals along the tunnel length direction, and their openings are all connected to the main drainage pipe 100; and a water guide pipe 110 is installed on the main drainage pipe 100 to guide the water in the main drainage pipe 100 to the drainage ditch 400.

[0024] Several plugs 300 are installed inside the main drainage pipe 100. The plugs 300 are spaced apart along the length of the main drainage pipe 100. The plugs 300 are either connected to or separated from the inner wall of the main drainage pipe 100. When the plugs 300 are connected to the inner wall of the main drainage pipe 100, they block the opening of the water guide pipe 110 to isolate the inner cavity of the main drainage pipe 100 into multiple independent spaces. The plugs 300 are connected to the blocking agent supply port, which introduces blocking agent into the independent spaces.

[0025] During actual construction, the main drainage pipe 100 is pre-embedded between the tunnel lining and the inner wall, and the blind drainage pipe 200 extends along the circumferential direction of the tunnel sidewall. The openings of the main drainage pipe 100 and the blind drainage pipe 200 are connected, allowing water in the tunnel to enter the main drainage pipe 100 through the blind drainage pipe 200 and be discharged into the drainage ditch 400 through the water guide pipe 110 installed on the main drainage pipe 100, so as to implement the drainage of water.

[0026] A sealing head 300 is installed inside the drainage main pipe 100. The blocking agent is introduced into the drainage main pipe 100 through the blocking agent supply port. When the sealing head 300 forms a seal with the inner wall of the drainage main pipe 100, the sealing head 300 seals the pipe opening of the water guide pipe 110, so that the blocking agent can effectively enter the various gaps in the tunnel waterproofing system, thereby achieving the purpose of dissolving the deposited salt, effectively cleaning the blockage problem, ensuring the safety of the entire drainage system of the highway tunnel, improving the service life of the tunnel, and reducing maintenance costs.

[0027] Multiple sealing heads 300 are arranged along the length of the drainage main pipe 100. When the sealing head 300 blocks the opening of the water guide pipe 110, the adjacent sealing heads 300 can divide the drainage main pipe 100 and the drainage system in the tunnel where the drainage main pipe 100 is located into small independent spaces.

[0028] When the blocking agent is introduced into the independent space of this small area, it can effectively dissolve the salt substances deposited in the gaps of the drainage system in the small area, especially the deposits in the pores of the drainage blind pipe 200. It can effectively ensure the stability of water conduction in the drainage blind pipe 200, effectively ensure the cleanliness of the entire drainage system, and ensure the efficient operation of the entire drainage system.

[0029] The blocking agents are of various types, including natural polymer blocking agents, phosphorus-containing descaling agents, and copolymer blocking agents. They can effectively eliminate various polymers and can form soluble polymers with calcium ions, magnesium ions, etc. in the drainage system, so that the precipitates cannot accumulate to form large-volume precipitates, thus ensuring the stable operation of the entire drainage system.

[0030] To ensure that the water flow between the tunnel sidewall lining and the inner wall can be reliably guided into the main drainage pipe 100 in the entire drainage system, an independent space area is formed by the main drainage pipe 100. A drainage strip 500 is set between the tunnel sidewall lining and the tunnel inner wall, and a drainage blind pipe 200 is set between the drainage strip 500 and the tunnel inner wall.

[0031] Specifically, the main drainage pipe 100 is equipped with a spigot sleeve 120, and the spigot sleeve 120 is equipped with a spigot interface 121. The spigot interface 121 is arranged along the length of the spigot sleeve 120, and the lower end of the waterproof tape 500 is inserted into the spigot interface 121. In addition, the lower end of the drainage blind pipe 200 is connected to the cavity of the water inlet pipe 210, and the water inlet pipe 210 is connected to the main drainage pipe 100 through a branch pipe. The water inlet pipe 210 is arranged along the length of the tunnel.

[0032] With the above settings, the water flow between the tunnel sidewall lining and the tunnel inner wall is directed to the insertion interface 121 by the drainage ditch on the sidewall of the drainage strip 500, and then introduced into the drainage main pipe 100. The water flow directed from the drainage blind pipe 200 enters the drainage main pipe 100 through the water inlet pipe 210.

[0033] To ensure that the sealing head 300 can be effectively inserted into the drain pipe 100 when it is fitted with the drain pipe 100, such as... Figure 9 As shown, the plugging head 300 includes an outlet pipe 310, one end of which is connected to the blocking agent supply port. The outlet pipe 310 is a reducing pipe, and inlet and outlet 311 are provided on the pipe wall of the outlet pipe 310. The inlet and outlet 311 are linear.

[0034] The outlet pipe 310 is connected to the diameter-changing drive unit, which drives the outlet pipe 310 to either increase or decrease in diameter. When the diameter of the outlet pipe 310 increases, the opening of the inlet and outlet 311 increases; when the diameter of the outlet pipe 310 decreases, the opening of the inlet and outlet 311 decreases or closes.

[0035] When the diameter of the outlet pipe 310 increases, it abuts against the inner wall of the main drainage pipe 100, thus cutting off the main drainage pipe 100. At this time, the opening of the inlet and outlet 311 becomes larger. By introducing the blocking agent into the outlet pipe 310, the blocking agent can effectively enter the gaps in the drainage system of each section and achieve the purpose of effective ablation.

[0036] When cutting off the main drainage pipe 100, to further ensure the reliability of the entire cutoff of the main drainage pipe 100, such as... Figures 4-6As shown, an expansion ring 320 is provided at one end of the outlet pipe 310, and the expansion ring 320 is arranged coaxially with the core of the outlet pipe 310. When the diameter of the outlet pipe 310 increases, the diameter of the expansion ring 320 increases and it abuts against and seals against the inner wall of the main drain pipe 100. When the diameter of the outlet pipe 310 decreases, the diameter of the expansion ring 320 decreases and the main drain pipe 100 forms a connected pipeline.

[0037] When the plugging head 300 expands to seal the main drainage pipe 100, the expansion ring 320 also expands along with the plugging head 300 until the outer wall of the expansion ring 320 can effectively and reliably compress the inner wall of the main drainage pipe 100, thus forming a single, independent space within the main drainage pipe 100. By introducing a blocking agent into the main drainage pipe 100, the blocking agent is guided within the independent space, allowing it to fully combine with sediments or free substances, ensuring the stable operation of the entire drainage system.

[0038] In one specific implementation, the outer wall of the expansion ring 320 is provided with an extended sealing baffle 321. The extended sealing baffle 321 is made of rubber and is positioned to either block or move away from the opening of the water pipe 110.

[0039] An extended sealing baffle 321 is provided on the outer wall of the expansion ring 320. When the expansion ring 320 expands, the extended sealing baffle 321 abuts against the opening of the water pipe 110, which can effectively seal the water pipe 110.

[0040] When the blocking agent is introduced into the drainage main pipe 100 to block the sediment in the entire drainage system of the tunnel, after the dissolution time reaches 24 hours, the blocking agent in the drainage main pipe 100 is sucked out by the suction equipment to ensure the cleanliness of the entire system.

[0041] Furthermore, the outlet pipe 310 is a rubber pipe, and the inlet and outlet 311 are arranged along the length of the pipe wall of the outlet pipe 310. The diameter-changing drive unit drives the two ends of the outlet pipe 310 to move closer or further away. The diameter of the outlet pipe 310 increases or decreases as the two ends of the outlet pipe 310 move closer or further away.

[0042] When the diameter of the outlet pipe 310 is changed, the two ends of the outlet pipe 310 are driven to move closer or further away by the diameter change drive unit. When the two ends of the outlet pipe 310 move closer, the diameter of the outlet pipe 310 increases and the opening of the inlet and outlet 311 increases, which facilitates the discharge and suction of the blocking agent. When the two ends of the outlet pipe 310 move further away, the diameter of the outlet pipe 310 decreases and the opening of the inlet and outlet 311 decreases, so that the water collected in the drainage main pipe 100 can be discharged.

[0043] To ensure that the extended sealing baffle 321 can effectively block the joint opening of the water pipe 110 and the main drainage pipe 100, a fine-tuning rotation mechanism is provided on the outlet pipe 310. When the two ends of the outlet pipe 310 are driven close by the variable diameter drive unit, the fine-tuning rotation mechanism drives the expansion ring 320 and the extended sealing baffle 321 to rotate, so that the extended sealing baffle 321 abuts against the joint opening of the water pipe 110 and the main drainage pipe 100.

[0044] When the two ends of the variable diameter drive unit drive the outlet pipe 310 to approach each other, the fine-tuning rotation mechanism drives the expansion ring 320 and the extended sealing baffle 321 to rotate, so that the expansion ring 320 can adapt to the change of the pipe cavity of the main drainage pipe 100, thereby enabling the expansion ring 320 and the extended sealing baffle 321 to effectively and reliably abut against the inner wall of the main drainage pipe 100, and the extended sealing baffle 321 is preferably sealed at the joint of the water guide pipe 110 and the main drainage pipe 100, ensuring the blocking effect of the entire main drainage pipe 100.

[0045] Specifically, such as Figures 7-9 As shown, when moving the two ends of the outlet tube 310 closer or further away, a first coupling disc 330 is provided at one end of the outlet tube 310, and a second coupling disc 340 is provided at the other end of the outlet tube 310.

[0046] The second coupling disc 340 is provided with a guide slide rod 341. Multiple sets of guide slide rods 341 are arranged along the circumferential direction of the second coupling disc 340. One end of the guide slide rod 341 forms a sliding guide engagement with the first coupling disc 330. A return spring 342 is sleeved on the guide slide rod 341. The two ends of the return spring 342 abut against the disc surfaces of the first coupling disc 330 and the second coupling disc 340, respectively.

[0047] A first connecting plate 330 and a second connecting plate 340 are provided at both ends of the outlet pipe 310. The first connecting plate 330 and the second connecting plate 340 are connected by a guide slide rod 341 and a return spring 342, which can effectively realize the expansion or reset of the outlet pipe 310 to ensure the sealing, introduction of blocking agent and suction discharge of the drainage main pipe 100.

[0048] When expanding the expansion ring 320, a first sliding bracket 343 is provided in the radial direction of the second mating disc 340, and a guide sliding hole 3431 is provided in the longitudinal direction of the first sliding bracket 343. The expansion ring 320 includes multiple sets of expansion units, which are arranged along the circumferential direction of the outlet pipe 310. A second sliding bracket 322 is provided on the expansion ring 320, and the second sliding bracket 322 and the guide sliding hole 3431 form a sliding fit.

[0049] Furthermore, multiple expansion units are provided with guide rollers 323, and a guide rail 331 extends from the first connecting plate 330. The guide rail 331 is folded and abuts against the guide rollers 323. The extended end of the guide rail 331 is provided with a hook fold plate 332. The guide rail 331 and the hook fold plate 332 are parallel and the gap between them forms a snap-fit ​​opening for snapping the guide rollers 323.

[0050] When the expansion ring 320 is expanded, the first connecting plate 330 moves closer to the second connecting plate 340, the guide rail 331 abuts against the guide roller 323, and multiple sets of expansion units slide outward along the radial direction of the outlet pipe 310, so that the outer wall of the multiple sets of expansion units abuts against the inner wall of the drainage main pipe 100, thereby blocking the drainage main pipe 100. The inner cavity of the drainage main pipe 100 forms multiple independent units, ensuring that each independent unit in the drainage system is cleaned, and facilitating the extraction of the cleaned water from each independent unit out of the entire drainage main pipe 100, thus ensuring the cleanliness of the system.

[0051] To drive the first coupling disc 330 to expand the outlet tube 310, the variable diameter drive unit includes a drive wire 333 disposed on the end face of the first coupling disc 330. The drive wire 333 passes through the central hole of the first coupling disc 330 and the outlet tube 310 and extends out from the second coupling disc 340. The other end of the drive wire 333 is connected to a tensioning unit, which drives the first coupling disc 330 to slide along the guide slide bar 341.

[0052] The tensioning unit pulls the driving steel wire 333, causing the first connecting plate 330 to slide along the guide slide bar 341, bringing the two ends of the outlet pipe 310 closer together, thereby expanding the outlet pipe 310 to facilitate the blocking of the main drainage pipe 100, and introducing a blocking agent into the outlet pipe 310 to clean the subsystem of the entire drainage system and ensure the continuity of the entire system.

[0053] When pulling the drive wire 333, such as Figure 10 As shown, a first guide wheel 3303 is rotatably mounted on the surface of the first coupling disc 330, and a drive wire 333 abuts against the first guide wheel 3303. A second guide wheel 344 is rotatably mounted on the second coupling disc 340, and the drive wire 333 abuts against the second guide wheel 344 and converges towards the center of the second coupling disc 340 to form a drive rope. A rotating connector 334 is provided at the converging end of the drive wire 333, and the other end of the rotating connector 334 is connected to a pull rope 335, which abuts against the third guide wheel 345.

[0054] 77 specific, such as Figure 2 and Figure 3As shown, the tensioning unit includes a tensioning bracket 336, which is slidably mounted on a mounting bracket 337. A tensioning electric cylinder is mounted on the mounting bracket 337. The mounting bracket 337, the tensioning bracket 336, and the tensioning electric cylinder are installed in the drainage ditch 400. The mounting bracket 337 is arranged along the length of the drainage ditch 400. The piston rod end of the tensioning electric cylinder is connected to the tensioning bracket 336.

[0055] According to actual usage requirements, the tensioning electric cylinder is activated periodically, causing the tensioning bracket 336 to slide along the mounting bracket 337 and the pull rope 335 to slide along the width direction of the drainage ditch 400, thereby pulling the drive steel wire 333 until the first connecting plate 330 is pulled, so as to block the drainage main pipe 100.

[0056] When introducing the blocking agent into the outlet tube 310, a guide tube 350 is provided inside the core of the first connecting disc 330, and a guide slide tube 339 is provided at the center of the first connecting disc 330. The extended end of the guide slide tube 339 is a closed blind tube and a guide opening is provided on the tube wall. One end of the guide tube 350 is connected or cut off with the guide opening.

[0057] When the drive wire 333 pulls the first connecting plate 330, and the first connecting plate 330 slides along the guide slide rod 341, one end of the guide tube 350 is connected to the guide opening. The blocking agent smoothly enters the guide opening, and then enters the outlet tube 310. The blocking agent enters the main drainage pipe 100 through the inlet and outlet 311, and finally enters the gaps in the entire drainage system to dissolve the sediment accumulated in the drainage system and ensure the smooth flow of the entire drainage system.

[0058] To achieve the deflection of the outlet tube 310, the fine-tuning rotation mechanism includes a fine-tuning sleeve 351 disposed on the outer wall of the guide tube 350, a support sleeve 3301 extending from the center of the first connecting plate 330, a spiral groove 3511 disposed on the outer wall of the fine-tuning sleeve 351, and a lever 3302 disposed on the inner wall of the support sleeve 3301, the lever 3302 extending into the spiral groove 3511.

[0059] When the drive wire 333 pulls the first connecting plate 330, and the first connecting plate 330 slides along the guide slide rod 341, the lever 3302 on the inner wall of the support sleeve 3301 is located in the spiral groove 3511, causing the outlet pipe 310 to slide along the guide pipe 350, thereby causing the outlet pipe 310 to generate a certain deflection angle along the guide pipe 350, ensuring that the expansion ring 320 and the extended sealing baffle 321 generate a certain deflection, so as to ensure that the expansion ring 320 and the extended sealing baffle 321 can adapt to the obstruction of the deformed drainage main pipe 100, and ensure that the extended sealing baffle 321 can effectively implement the sealing of the connection port of the water guide pipe 110 and the drainage main pipe 100, ensuring the obstruction effect of the entire drainage main pipe 100.

[0060] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A drainage system for a highway tunnel, comprising: Drainage main pipe (100), the drainage main pipe (100) is installed in the tunnel sidewall lining and arranged along the tunnel length direction; A drainage blind pipe (200) is arranged along the circumferential direction of the tunnel sidewall, and its opening is connected to the drainage main pipe (100); A water guide pipe (110) is provided on the main drainage pipe (100) for guiding the water in the main drainage pipe (100) to the drainage ditch (400); The feature is that a plurality of sealing heads (300) are provided inside the main drainage pipe (100), and the sealing heads (300) are either connected to or separated from the inner wall of the main drainage pipe (100); when the sealing heads (300) are connected to the inner wall of the main drainage pipe (100), the sealing heads (300) seal the opening of the water guide pipe (110) so as to isolate the inner cavity of the main drainage pipe (100) into multiple independent spaces; the sealing heads (300) are connected to the blocking agent supply port, and the blocking agent supply port introduces the blocking agent into the independent spaces; The plugging head (300) includes a discharge pipe (310), which is a reducing pipe with an inlet and outlet (311) on its wall. The inlet and outlet (311) are strip-shaped. The discharge pipe (310) is connected to a reducing pipe drive unit, which drives the discharge pipe (310) to change its diameter. One end of the discharge pipe (310) is connected to the blocking agent supply port. The outlet tube (310) is provided with a first connecting plate (330) and a second connecting plate (340) at both ends. A guide slide rod (341) is provided on the second connecting plate (340). The other end of the guide slide rod (341) is slidably engaged with the first connecting plate (330). A return spring (342) is sleeved on the guide slide rod (341). The two ends of the return spring (342) abut against the surfaces of the first connecting plate (330) and the second connecting plate (340) respectively. The variable diameter drive unit includes a drive wire (333) disposed on the end face of the first connecting plate (330). The drive wire (333) passes through the central hole of the first connecting plate (330) and the outlet tube (310) and extends out from the second connecting plate (340). The extended end of the drive wire (333) is connected to the tensioning unit. The tensioning unit drives the first connecting plate (330) to slide along the guide slide rod (341) through the drive wire (333).

2. The highway tunnel drainage system according to claim 1, characterized in that, An expansion ring (320) is provided at one end of the outlet pipe (310), and the expansion ring (320) is coaxially arranged with the core of the outlet pipe (310). When the diameter of the outlet pipe (310) increases, the diameter of the expansion ring (320) increases and it abuts against and seals against the inner wall of the main drain pipe (100). When the diameter of the outlet pipe (310) decreases, the diameter of the expansion ring (320) decreases and the main drain pipe (100) forms a connected pipeline. An extension sealing baffle (321) is provided on the outer wall of the expansion ring (320), and the extension sealing baffle (321) and the opening of the water guide pipe (110) form abutment sealing or separation cooperation.

3. The highway tunnel drainage system according to claim 2, characterized in that, The second connecting plate (340) is provided with a first sliding bracket (343) in the radial direction, and a guide sliding hole (3431) is provided in the length direction of the first sliding bracket (343). The expansion ring (320) is provided with a second sliding bracket (322), and the second sliding bracket (322) slides in cooperation with the guide sliding hole (3431).

4. The highway tunnel drainage system according to claim 1, characterized in that, The first connecting disc (330) is nested with a guide slide tube (339) and a guide tube (350). The extended end of the guide slide tube (339) is a closed blind tube with a guide opening on the tube wall. One end of the guide tube (350) is connected to or cut off from the guide opening.

5. The highway tunnel drainage system according to claim 4, characterized in that, A fine-tuning rotation mechanism is provided on the outlet pipe (310). When the variable diameter drive unit drives the two ends of the outlet pipe (310) to approach each other, the fine-tuning rotation mechanism causes the expansion ring (320) and the extended sealing baffle (321) to rotate, and causes the extended sealing baffle (321) to abut against the joint of the water guide pipe (110) and the drainage main pipe (100).

6. The highway tunnel drainage system according to claim 5, characterized in that, The fine-tuning rotation mechanism includes a fine-tuning sleeve (351) disposed on the outer wall of the guide tube (350), a support sleeve (3301) extending from the core of the first connecting disc (330), a spiral groove (3511) disposed on the outer wall of the fine-tuning sleeve (351), and a lever (3302) disposed on the inner wall of the support sleeve (3301), the lever (3302) extending into the spiral groove (3511).

7. A construction method for a highway tunnel drainage system, comprising: A main drainage pipe (100) is laid inside the tunnel sidewall lining, and a blind drainage pipe (200) is arranged in the circumferential direction of the tunnel sidewall to connect the opening of the main drainage pipe (100) and the blind drainage pipe (200). A drainage strip (500) is installed between the tunnel sidewall lining and the tunnel inner wall, and the lower end of the drainage strip (500) is connected to the drainage main pipe (100); A water pipe (110) is connected to the main drain pipe (100), and the other end of the water pipe (110) extends to the drain ditch (400). The feature is that multiple sealing heads (300) are installed inside the drainage main pipe (100), the sealing heads (300) are connected to the blocking agent supply port, and the blocking agent supply port introduces the blocking agent into the drainage main pipe (100) through the outlet pipe (310) of the sealing head (300); The drainage system is the highway tunnel drainage system as described in any one of claims 1-6.

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