Tunnel construction wastewater diversion collection treatment system

Abstract

The utility model discloses a tunnel construction waste water diversion collection treatment system which comprises a tunnel face water collection tank, the tunnel face water collection tank comprises an inner tank and an outer tank, the inner tank comprises a tank body framework composed of hard rods and a waterproof material layer wrapping the tank body framework, the top face of the inner tank is open, and the outer tank is arranged on the outer side of the inner tank. A communicating interface is formed in the lower part of the box body of the inner box; the inner box is placed in the outer box, the height of the inner box is larger than that of the outer box, and a water outlet is formed in the lower portion of a box body of the outer box. The tunnel face catchment tank is connected into the catchment pipeline through a drainage hose and then enters the catchment pool. The system is further provided with a ground catchment device and a secondary lining waste water collection tank. According to the diversion collection and treatment system for the tunnel construction wastewater, the treatment amount of the tunnel face construction wastewater can be greatly reduced, and the treatment efficiency of the tunnel construction wastewater is improved.

Description

Technical Field

[0001] This utility model belongs to the field of highway construction wastewater treatment technology, specifically relating to a tunnel wastewater classification, collection and treatment device. Background Technology

[0002] Tunnel construction wastewater includes bedrock fissure water generated during face construction, water inrush during tunnel crossings, wastewater from drilling, blasting, and other construction processes, as well as wastewater generated during lining. Among these, fissure water and water inrush from face construction and wastewater from secondary lining are the most prevalent. Tunnel construction wastewater is mixed with a large amount of dust and mud, resulting in a high suspended solids (SS) content. Furthermore, due to the presence of large amounts of calcium compounds in the construction materials, the wastewater, when mixed with these compounds, becomes alkaline, exceeding discharge standards.

[0003] Existing technologies typically involve constructing trenches and pipelines at the tunnel construction site for the diversion, collection, and preliminary treatment of wastewater. For example, Chinese patent document CN109763859B discloses a wastewater separation device for tunnel construction. This device includes a wastewater drainage ditch, where wastewater from the tunnel face and the primary lining section is directed to the wastewater drainage ditch and ultimately enters a wastewater sedimentation tank for treatment. Simultaneously, the device also includes a clean water drainage ditch, where wastewater from the secondary lining construction enters and flows naturally out of the tunnel. Since the wastewater from the tunnel face has a higher pollutant content, while the wastewater from the secondary lining construction is relatively clean, this device achieves the separation and collection of wastewater from the tunnel face and the secondary lining construction, thus creating conditions for subsequent classified treatment.

[0004] In tunnel construction wastewater, secondary lining wastewater is mainly clear water, and its treatment process is relatively simple after diversion. However, face-dwelling wastewater requires more complex treatment processes such as sedimentation and coagulation before discharge. The existing technology described above separates and collects secondary lining and face-dwelling wastewater, reducing the workload of complex processes and improving wastewater treatment efficiency. However, such diversion and collection devices still face challenges in actual production. From the perspective of tunnel construction wastewater sources, the volume of face-dwelling wastewater is greater than that of secondary lining wastewater. Due to space and condition limitations at tunnel construction sites, large-scale wastewater treatment facilities are usually not feasible, leaving significant wastewater treatment pressure. Summary of the Invention

[0005] This application addresses the problem of significant wastewater treatment pressure faced in existing tunnel construction, and provides a tunnel wastewater classification, collection, and treatment device.

[0006] The technical solution adopted by this application to solve the above-mentioned technical problems is as follows:

[0007] A tunnel construction wastewater diversion and collection system includes: a face water collection tank, comprising an inner tank and an outer tank; the inner tank includes a frame made of rigid rods and a waterproof material layer covering the frame; the top of the inner tank is open; a communication interface is provided at the bottom of the inner tank; the inner tank is placed inside the outer tank, the height of the inner tank being greater than the height of the outer tank; a drain outlet is provided at the bottom of the outer tank; and a drainage hose, the drainage hose passing through the drain outlet of the outer tank and connecting to the inner tank. The system includes: a water collection pipe, with the drainage hose connected to the water collection pipe, the water collection pipe comprising multiple drainage pipe sections connected in sequence, adjacent drainage pipe sections being connected by a detachable structure, and a water pump installed on the water collection pipe; a water collection pool connected to the outlet of the water collection pipe, the water collection pool having a direct discharge outlet; a ground water collection device and a secondary lining wastewater collection trough, the ground water collection device comprising a water collection pit located in front of the tunnel face and a drainage trough connected to the water collection pit; and the secondary lining wastewater collection trough being installed along both sides of the tunnel.

[0008] The box frame includes horizontal bars and vertical bars. The horizontal bars are connected end to end to form the bottom frame of the inner box. The vertical bars extend upward from the connection point of every two horizontal bars to form the side frame of the inner box. Fixed mounting holes are provided at the top of the vertical bars.

[0009] At least two water collection tanks are provided at the working face, and each water collection tank is equipped with a drainage hose.

[0010] The outer bottom surface of the outer casing is provided with an anti-slip layer or with a protrusion.

[0011] The inner and outer boxes of the working face water collection tank are both boxes that gradually taper from top to bottom.

[0012] It is also equipped with a filter screen, the shape of which matches the cross-sectional shape of the inner box.

[0013] The height ratio of the inner box to the outer box is 1:(2-3).

[0014] It also includes a ground wastewater treatment device, which includes a pretreatment tank and a sedimentation tank arranged in sequence, and the inlet of the pretreatment tank is connected to the drainage ditch through a pipe.

[0015] It also includes a secondary lining wastewater tank, the inlet of which is connected to the secondary lining wastewater collection tank via a pipe.

[0016] The adjacent drainage pipes of the water collection pipeline are connected by a threaded structure or a compression fitting structure.

[0017] The advantages of the tunnel construction wastewater diversion, collection, and treatment system described in this application are:

[0018] The tunnel construction wastewater diversion collection and treatment system described in this application includes a movable face water collection tank. The top of the face water collection tank is open, allowing it to collect fissure water and seepage water flowing down from the top or construction face. The face water collection tank consists of an inner tank and an outer tank. The inner tank includes a rigid frame made of stiff rods and a waterproof material layer covering the frame. The inner tank, made of the frame and waterproof material layer, is lightweight. The outer tank serves as a load-bearing and anti-slip layer. In a preferred embodiment, the ground of the outer tank can be provided with an anti-slip layer or raised surfaces. By combining the inner and outer tanks, this application effectively reduces the overall weight of the tank while maintaining its depth, thereby reducing the workload of construction workers. The water collected by the face water collection tank is usually of good quality. It is guided to a collection pool through a collection pipeline. If the pH value meets the discharge standards, it can be directly discharged. If it does not meet the standards, it can be discharged after simple acid-base adjustment in the pool. The system simultaneously collects construction wastewater from the tunnel face flowing to the ground through a surface wastewater treatment device and secondary lining construction wastewater through a secondary lining wastewater pool. Because this application separates the fissure water and seepage water generated during tunnel face construction, collecting them before they reach the ground, it prevents them from mixing with dust and construction materials to form difficult-to-treat wastewater. This significantly reduces the amount of construction wastewater from the tunnel face and improves the efficiency of tunnel construction wastewater treatment.

[0019] To make the technical solution of the tunnel construction wastewater diversion collection and treatment system of this utility model clearer, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] like Figure 1 The diagram shown is a schematic of the tunnel construction wastewater diversion, collection, and treatment system of this utility model.

[0021] like Figure 2 The diagram shown is a structural schematic of the working face water collection tank of this utility model;

[0022] like Figure 3 The diagram shown is a structural schematic of the inner tank of the working face water collection tank of this utility model;

[0023] The attached figures are labeled as follows:

[0024] 1-Working face water collection tank; 11-Inner tank frame; 12-Inner tank waterproof material layer; 13-Inner tank connection interface; 14-Outer tank; 15-Drain outlet; 16-Fixing hole; 2-Drain hose; 3-Water collection pipeline; 4-Water collection pool; 5-Secondary lining wastewater collection tank; 6-Water sump; 7-Drainage trough. Detailed Implementation

[0025] This embodiment provides a tunnel construction wastewater diversion, collection, and treatment system, such as... Figure 1 As shown, the system includes a face water collection tank 1, which comprises an inner tank and an outer tank 14, as... Figure 2 As shown. The inner box includes a box frame 11 composed of rigid rods, as... Figure 3 As shown, the tank frame 11 includes horizontal bars and vertical bars. The horizontal bars are connected end to end to form the bottom frame of the working face water collection tank 1. The vertical bars extend upwards from the connection point of every two horizontal bars to form the side frame of the working face water collection tank 1. A fixing hole 16 is provided at the top of each vertical bar, allowing it to be fixed to a wall or a temporary construction scaffold using bolts or ropes if necessary. In a preferred embodiment, the side frame of the inner tank is inclined, resulting in the inner tank of the working face water collection tank 1 gradually tapering from top to bottom. A waterproof material layer 12 is covered on the tank frame 11. The waterproof material layer 12 can be made of commercially available waterproof fabric, such as waterproof polyester fabric, which is lightweight and effectively reduces the weight of the inner tank. The waterproof material layer 12 covers the tank frame 11, forming an open-top tank. A communication interface 13 is provided at the bottom of the inner tank. To filter solid particles such as gravel in the flowing water, a filter screen (not shown for viewing purposes) is installed inside the inner tank. The shape of the filter screen matches the cross-sectional shape of the inner tank. It is installed inside the inner tank and located above the communication interface 13. In this embodiment, the inner tank of the working face water collection tank 1 has various sizes, including a large tank with a length × height × width of 100cm × 80cm × 80cm and a narrow tank with a length × height × width of 90cm × 80cm × 40cm. The former is more suitable for placement on the ground of the construction site to collect the top water flow, while the latter is more suitable for placement below the working face wall.

[0026] The outer casing 14 is made of stainless steel, and the inner casing is placed inside the outer casing 14. The outer wall of the inner casing is substantially flush with the inner wall of the outer casing 14. The height of the inner casing is greater than the height of the outer casing 14. A drain outlet 15 is provided at the bottom of the outer casing 14. The outer casing 14 also has a shape that gradually tapers from top to bottom. In this embodiment, the ratio of the height of the inner casing to the height of the outer casing 14 is 1:2.

[0027] The system is equipped with a drainage hose 2, which passes through the drainage port 15 of the outer casing 14 and connects to the communication interface 13 of the inner casing. In this embodiment, the face water collection tank 1 is used to collect fissure water and seepage water flowing from the top or side. The face water collection tank 1 is equipped with an independent water collection pipeline 3 for collecting and discharging water. The water collection pipeline 3 includes multiple drainage pipes connected in sequence. Adjacent drainage pipes are connected by a detachable structure. Alternatively, adjacent drainage pipes can be connected by a threaded structure. Alternatively, they can be connected using a detachable structure such as a compression fitting. The hose is connected to the end of the water collection pipeline 3 near the face. A water pump is installed on the water collection pipeline 3. As construction progresses, the water collection pipeline 3 is continuously lengthened, allowing for the installation of multiple water pumps. In a preferred embodiment, the system is equipped with multiple face water collection tanks 1, such as... Figure 1 As shown, each of the working face water collection tanks 1 is equipped with a drain hose 2, which can collect water flow at the same time.

[0028] A collection tank 4 is located downstream of the water collection pipeline 3. The collection tank 4 is connected to the outlet of the water collection pipeline 3 and has a direct discharge outlet. Water from the water collection pipeline 3 enters the collection tank 4. Water quality indicators in the collection tank 4 can be tested manually or automatically, typically by measuring pH value. When the pH value is within acceptable limits, the water in the collection tank 4 can be directly discharged through the direct discharge outlet. If the pH value is not within acceptable limits, the water can be adjusted for pH within the collection tank 4 before discharge. A direct discharge pipe is connected to the direct discharge outlet, and a valve is installed on the direct discharge pipe.

[0029] The tunnel construction wastewater diversion and collection system in this embodiment also includes a surface water collection device, comprising a water collection pit 6 located in front of the tunnel face and a drainage ditch 7 connected to the water collection pit 6. The water collection pit 6 is used to collect gushing water, fissure water, and construction wastewater that has flowed to the surface. This wastewater is mixed with dust, mud, construction materials, etc., and requires further treatment before discharge. As an optional implementation, the surface wastewater treatment device can consist of a primary treatment tank and a sedimentation tank arranged sequentially. The inlet of the primary treatment tank is connected to the drainage ditch 7 through a first water supply pipe, and a water pump is installed on the pipe between the primary treatment tank and the drainage ditch.

[0030] The tunnel construction wastewater diversion and collection system also includes a secondary lining wastewater collection tank 5, which is installed along both sides of the tunnel to collect secondary lining construction wastewater. Alternatively, a secondary lining wastewater treatment pool can be installed. The inlet of the secondary lining wastewater pool is connected to the secondary lining wastewater collection tank via a second conveying pipe. The secondary lining wastewater is cleaner than the tunnel face wastewater and can be discharged after simple treatment in the secondary lining wastewater pool.

[0031] In this embodiment, the tunnel construction wastewater diversion and collection system operates by placing the face water collection tank 1 at the construction site to collect fissure water and seepage from the side walls and top. The collected water flows through the collection pipe 3 to the collection pool 4. If the pH is within acceptable limits, it is discharged directly through the direct discharge outlet; otherwise, it is adjusted within the collection pool 4 before being discharged. Construction wastewater from the face flowing to the ground flows into the sump 6 and drainage ditch 7, and is then transported to the surface wastewater treatment device for treatment. Secondary lining construction wastewater flows into the secondary lining wastewater collection ditch 5, and is then transported to the secondary lining wastewater pool for treatment.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the claims.

Claims

1. A wastewater diversion, collection, and treatment system for tunnel construction, characterized in that, include: A working face water collection tank includes an inner tank and an outer tank. The inner tank includes a frame made of rigid rods and a waterproof material layer covering the frame. The top of the inner tank is open, and a communication interface is provided at the bottom of the inner tank. The inner tank is placed inside the outer tank, and the height of the inner tank is greater than the height of the outer tank. A drain outlet is provided at the bottom of the outer tank. A drain hose, which passes through the drain outlet of the outer casing and connects to the communication interface of the inner casing; A water collection pipeline, wherein the drain hose is connected to the water collection pipeline, the water collection pipeline includes multiple drain pipes connected in sequence, adjacent drain pipes are connected by a detachable structure, and a water pump is installed on the water collection pipeline; A water collection tank is connected to the outlet of the water collection pipeline, and the water collection tank is equipped with a direct discharge outlet; The surface water collection device includes a water collection pit located in front of the tunnel face and a drainage ditch connected to the water collection pit; the secondary lining wastewater collection ditch is located along both sides of the tunnel.

2. The tunnel construction wastewater diversion and collection treatment system according to claim 1, characterized in that, The box frame includes horizontal bars and vertical bars. The horizontal bars are connected end to end to form the bottom frame of the inner box. The vertical bars extend upward from the connection point of every two horizontal bars to form the side frame of the inner box. Fixed mounting holes are provided at the top of the vertical bars.

3. The tunnel construction wastewater diversion and collection treatment system according to claim 1 or 2, characterized in that, At least two water collection tanks are provided at the working face, and each water collection tank is equipped with a drainage hose.

4. The tunnel construction wastewater diversion and collection treatment system according to claim 3, characterized in that, The outer bottom surface of the outer casing is provided with an anti-slip layer or with a protrusion.

5. The tunnel construction wastewater diversion and collection treatment system according to claim 4, characterized in that, The inner and outer boxes of the working face water collection tank are both boxes that gradually taper from top to bottom.

6. The tunnel construction wastewater diversion and collection treatment system according to claim 5, characterized in that, It is also equipped with a filter screen, the shape of which matches the cross-sectional shape of the inner box.

7. The tunnel construction wastewater diversion and collection treatment system according to claim 6, characterized in that, The height ratio of the inner box to the outer box is 1:(2-3).

8. The tunnel construction wastewater diversion and collection treatment system according to claim 7, characterized in that, It also includes a ground wastewater treatment device, which includes a pretreatment tank and a sedimentation tank arranged in sequence, and the inlet of the pretreatment tank is connected to the drainage ditch through a pipe.

9. The tunnel construction wastewater diversion and collection treatment system according to claim 8, characterized in that, It also includes a secondary lining wastewater tank, the inlet of which is connected to the secondary lining wastewater collection tank via a pipe.

10. The tunnel construction wastewater diversion and collection treatment system according to claim 9, characterized in that, The adjacent drainage pipes of the water collection pipeline are connected by a threaded structure or a compression fitting structure.

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