Seepage water guiding and draining device of diversion tunnel

Abstract

The utility model relates to the technical field of water diversion and drainage in tunnel excavation construction, in particular to a seepage water diversion and drainage device of a diversion tunnel. According to the technical scheme, the seepage water guiding and discharging device of the diversion tunnel is characterized by comprising a water filtering structure which is arranged on a tunnel rock wall of the diversion tunnel, covers seepage points on the tunnel rock wall and is used for filtering water seeping from the seepage points; the water blocking and draining structure is arranged on the downstream face of the water filtering structure through a fixing piece, and a water draining cavity is formed between the water blocking and draining structure and the water filtering structure; the water collecting structure is arranged at the bottoms of the water filtering structure and the water blocking and draining structure, and a water collecting cavity communicated with the water draining cavity is formed in the water collecting structure; the water diversion pipe is arranged at the bottom of the water collection structure, the water diversion pipe is communicated with the water collection cavity, and the water diversion pipe is used for guiding and discharging water in the water collection cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of water diversion and drainage in tunnel excavation construction, in particular to a seepage water diversion and drainage device for a water diversion tunnel. Background Art

[0002] As a common water conveyance system for hydraulic structures, water diversion tunnels are widely used in water conservancy projects. Usually, because water diversion tunnels are buried deep in the mountains and underground, and need to pass through complex terrain, the engineering geology and hydrogeology conditions are very complex. During the excavation and construction of tunnels, water seepage problems are very common. Solving the problem of water seepage in tunnels is a complex engineering challenge that requires comprehensive consideration of factors such as geological conditions, hydrogeological characteristics, and tunnel engineering design. The underground rock strata where the tunnel is located contain various types of groundwater layers. Under normal circumstances, groundwater will infiltrate along the cracks in the rock strata, which will have a very large impact on the excavation support and secondary lining construction of the tunnel. After the tunnel excavation is completed, if the seepage area is not dealt with in a timely and effective manner, it will seriously interfere with the subsequent secondary lining pouring construction, thereby adversely affecting the lining quality.

[0003] At present, traditional drainage systems usually use pipes and pump stations to deal with water seepage problems, but these methods have the following problems: the pipe system is not only limited by the water seepage speed and flow rate, but also requires regular maintenance and cleaning. At the same time, the energy required to set up a pump station is large and the corresponding operating cost is high. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the above existing problems, a seepage water diversion and drainage device for a water diversion tunnel is provided.

[0005] The technical solution adopted by the utility model is: a seepage drainage device for a water diversion tunnel, characterized in that it comprises:

[0006] A water filtering structure is arranged on the tunnel rock wall of the water diversion tunnel, the water filtering structure covers the water seepage points on the tunnel rock wall, and the water filtering structure is used to filter the water seeping out from the water seepage points;

[0007] A water retaining and drainage structure is arranged on the back surface of the water filtering structure via a fixing member, and a drainage cavity is formed between the water retaining and drainage structure and the water filtering structure;

[0008] A water collection structure is provided at the bottom of the water filtering structure and the water blocking and drainage structure, wherein a water collection cavity communicating with the drainage cavity is provided inside the water collection structure;

[0009] A water diversion pipe is arranged at the bottom of the water collecting structure, the water diversion pipe is connected with the water collecting cavity, and the water diversion pipe is used to guide and drain the water in the water collecting cavity.

[0010] Through the above-mentioned technical means, the water filtering structure is used to filter the seepage water at the seepage points on the rock wall of the tunnel, so that the filtered seepage water enters the drainage cavity, and the drainage structure can prevent the seepage water from spreading outward, so that the seepage water is collected into the water collecting cavity of the water collecting structure through the drainage cavity, and the seepage water is further drained through the water diversion pipe at the bottom of the water collecting structure, thereby reducing the impact on the quality of the secondary lining concrete pouring by timely draining the seepage water on the inner wall of the tunnel.

[0011] In some embodiments, the drainage structure includes a water-permeable layer, a water-permeable channel, and a water-stopping layer. The drainage cavity is formed between the water-permeable layer and the water filtering structure, the water-permeable channel is formed between the water-permeable layer and the water-stopping layer, the water-permeable channel is connected to the water collecting cavity, and the water in the drainage cavity can enter the water-permeable channel through the water-permeable layer.

[0012] In some embodiments, the permeable layer includes a permeable membrane made of geotextile material, and the water-stop layer includes a water-retaining steel plate, which is a corrugated color steel tile steel plate. A water-stop membrane is provided on the side of the water-retaining steel plate facing the permeable membrane, and the water-stop membrane is made of rubber, PVC or polyethylene. The permeable channel is formed between the permeable membrane and the water-stop membrane.

[0013] In some embodiments, a plurality of the drainage structures can be assembled according to the area of ​​the water seepage point, and the drainage structures are correspondingly connected to the water collection structure and the water diversion pipe.

[0014] In some embodiments, the water collection structure includes a water collection funnel, a sleeve steel pipe and a water diversion pipe. The water collection funnel is arranged at the bottom of the water filtration structure and the drainage structure. The sleeve steel pipe is penetrated through the bottom of the water collection funnel. The water diversion pipe adopts a steel wire corrugated pipe. The end of the sleeve steel pipe away from the water collection chamber is threadedly connected to the steel wire corrugated pipe.

[0015] In some embodiments, a filter membrane is provided at the end of the sleeve steel pipe facing the water collection chamber.

[0016] In some embodiments, the water filtration structure includes a water filtration membrane.

[0017] In some embodiments, the fixing member is an anchor bolt, a fixing anchor bolt hole is provided on the tunnel rock wall, the water seepage drainage device is fixed to the tunnel rock wall through the anchor bolt, and the joint between the water seepage drainage device and the tunnel rock wall is filled with anti-leakage foam filler.

[0018] In some embodiments, the anchor bolt is an expansion bolt chemical anchor bolt, a rubber ring is provided on the anchor bolt, and the anti-leakage foam filler is a polyurethane foam filler.

[0019] In some embodiments, at the connection between the tunnel rock wall and the water seepage drainage device, the rock periphery around the water seepage point is processed into a flat surface by spraying concrete or grinding.

[0020] The beneficial effects of the utility model are:

[0021] 1. By installing the device at the seepage point on the inner wall of the tunnel, when seepage occurs at the seepage point, the seepage at the seepage point is filtered by the water filtering structure, which can greatly reduce the gravel impurities on the inner wall of the tunnel from entering the drainage cavity. The seepage is blocked by the drainage structure and flows into the drainage cavity. The seepage in the drainage cavity is further collected in the water collecting cavity of the water collecting structure, and the water in the water collecting cavity is drained to the drainage ditch through the water diversion pipe. By timely draining the seepage in the tunnel, the seepage is prevented from gathering and affecting the pouring quality of the secondary lining concrete. In addition, the device has a simple structure and can be flexibly adjusted and arranged according to the seepage point, and has a lower cost than the pipeline system.

[0022] 2. Through the permeable channel provided inside the drainage structure, when part of the drainage cavity is blocked, the seepage water in the drainage cavity can enter the permeable channel and further gather in the water collecting cavity of the water collecting structure, and the seepage water is discharged by the water diversion pipe, thereby improving the overall drainage capacity of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of this application.

[0024] Figure 2 It is a schematic diagram of the cross-sectional top view of the structure of the present application.

[0025] Figure 3 It is a structural schematic diagram of the connection between the water diversion pipe and the water collection structure in this application.

[0026] Figure 4 It is a schematic diagram of the planar structure of the first embodiment.

[0027] Figure 5 It is a schematic diagram of the planar structure of the second embodiment.

[0028] Description of reference numerals:

[0029] 1. Tunnel rock wall; 2. Water seepage point; 3. Water diversion tunnel; 4. Water filtration structure; 5. Drainage retaining structure; 6. Water diversion pipe; 7. Drainage cavity; 8. Water collecting funnel; 9. Fixed anchor hole; 10. Joint; 11. Welding seam; 12. Anti-leakage foam filler; 13. Fixing parts; 401. Water filtration membrane; 501. Permeable layer; 502. Permeable channel; 503. Water-stop layer; 601. Sleeve steel pipe; 602. Filter membrane; 603. Thread.

[0030] This specification includes references to "one embodiment" or "an embodiment." The appearance of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. The particular features, structures or characteristics may be combined in any suitable manner consistent with the present disclosure.

[0031] The term "comprising" is open ended. As used in the appended claims, the term does not exclude additional structures or steps.

[0032] "First," "second," etc. As used herein, these terms act as labels for the nouns that precede them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below in conjunction with specific embodiments.

[0034] Embodiment 1:

[0035] Combination Figures 1 to 4 As shown, the present embodiment is a seepage drainage device for a water diversion tunnel, comprising a water filtering structure 4, a water retaining and drainage structure 5, a water collecting structure and a water diversion pipe 6. A water seepage point 2 exists in the tunnel rock wall 1 of the water diversion tunnel 3. The water filtering structure 4 is arranged on the tunnel rock wall 1. The water filtering structure 4 covers the water seepage point 2 on the tunnel rock wall 1. The water filtering structure 4 is used to filter the water seeping out of the water seepage point 2. The water retaining and drainage structure 5 is arranged on the back surface of the water filtering structure 4 via a fixing member 13. A drainage cavity 7 is formed between the water retaining and drainage structure 5 and the water filtering structure 4. A water collecting structure is provided at the bottom of the water filtering structure 4 and the water retaining and drainage structure 5. A water collecting cavity connected to the drainage cavity 7 is provided inside the water collecting structure. A water diversion pipe 6 is provided at the bottom of the water collecting structure. One end of the water diversion pipe 6 is connected to the water collecting cavity. The other end of the water diversion pipe 6 leads to the drainage ditch. The water diversion pipe 6 is used to drain the water in the water collecting cavity to the drainage ditch.

[0036] Furthermore, the water filtration structure 4 includes a water filtration membrane 401 , which is disposed on the tunnel rock wall 1 of the water diversion tunnel 3 . The water filtration membrane 401 is made of a highly permeable material and has a porous structure.

[0037] In some embodiments, such as Figure 2 As shown, the drainage structure 5 includes a water-permeable layer 501, a water-permeable channel 502 and a water-stopping layer 503. The water-permeable layer 501 is arranged on the back water surface of the water filtering structure 4. A drainage cavity 7 is formed between the water-permeable layer 501 and the water filtering structure 4. A water-permeable channel 502 is formed between the water-permeable layer 501 and the water-stopping layer 503. The water-permeable channel 502 is connected with the water collecting cavity. The water in the drainage cavity 7 can enter the water-permeable channel 502 through the water-permeable layer 501.

[0038] Furthermore, the permeable layer 501 includes a permeable membrane. In this embodiment, the permeable membrane is made of a geotextile type material. The water-stop layer 503 includes a water-retaining steel plate. The water-retaining steel plate should have the characteristics of strong impact resistance and corrosion resistance, and the steel plate material layer of the water-retaining steel plate does not cause acid and alkali damage to the concrete. In this embodiment, the water-retaining steel plate is made of a corrugated color steel tile type steel plate. A plurality of grooves are provided on the side of the water-retaining steel plate facing the permeable membrane. The grooves can play the role of water retaining, water gathering and drainage. A water-stop membrane is provided on the groove side. In this embodiment, the material of the water-stop membrane is made of rubber, PVC or polyethylene, etc. The thickness of the water-stop membrane is generally 2 to 3 mm, and a permeable channel 502 is formed between the permeable membrane and the water-stop membrane.

[0039] When a partial area in the drainage cavity 7 is blocked, the water in the drainage cavity 7 can enter the permeable channel 502 through the permeable membrane, and the permeable membrane can to a certain extent prevent impurities in the drainage cavity 7 from entering the permeable channel 502, so that part of the seepage water in the drainage cavity 7 can enter the water collecting cavity through the permeable channel 502, thereby completing the drainage.

[0040] In some embodiments, such as Figure 3 As shown, the water collecting structure includes a water collecting funnel 8, a sleeve steel pipe 601 and a water diversion pipe 6. The water collecting funnel 8 is arranged at the bottom of the water filtering structure 4 and the drainage structure 5. A water collecting cavity is formed inside the water collecting funnel 8. One side of the water collecting funnel 8 is fixed on the tunnel rock wall 1, and the other side of the water collecting funnel 8 is welded to the bottom of the water retaining steel plate. A weld 11 is formed between the water collecting funnel 8 and the water retaining steel plate. The weld 11 should be smooth, flat and impermeable. A sleeve steel pipe 601 is penetrated through the bottom of the water collecting funnel 8. The water collecting funnel 8 and the sleeve steel pipe 601 are welded. The end of the sleeve steel pipe 601 away from the water collecting cavity is threadedly connected to the water diversion pipe 6.

[0041] Furthermore, in the present embodiment, the end of the sleeve steel pipe 601 near the water collection chamber is wrapped with a filter membrane 602. The filter membrane 602 can be used to filter the water in the water collection chamber and then drain it to prevent impurities such as gravel and slag in the seepage water from entering the pipe and causing blockage. In the present embodiment, the water diversion pipe 6 adopts a steel wire bellows, and the first end of the steel wire bellows is fixed to the sleeve steel pipe 601 with a thread 603 or a knob-type buckle to avoid the steel wire bellows from falling off during the secondary lining concrete pouring construction process. The second end of the steel wire bellows leads to the drainage ditch outside the water diversion tunnel 3.

[0042] The steel wire corrugated pipe used in this embodiment is a water pipe woven from high-strength steel wires. It has excellent tensile strength and compressive resistance, can withstand greater external pressure and impact force, and reduce the risk of the water pipe being squeezed and deformed during concrete pouring and damaged, thereby maintaining the structural stability of the pipeline. The steel wire corrugated pipe has the characteristics of high strength, flexibility, corrosion resistance, good sealing performance and high temperature resistance, and can meet the needs in complex environments.

[0043] In some embodiments, the fixing member 13 is an anchor bolt, and a fixing anchor bolt hole 9 is provided on the tunnel rock wall 1. The water filtering structure 4, the water retaining and drainage structure 5 and the water collecting structure are all closely fitted with the water seepage point 2. The water retaining steel plate and the two sides of the water filtering membrane 401 and the bottom of the water collecting funnel 8 are fixed to the tunnel rock wall 1 through anchor bolts, and the joints 10 between the surroundings and the tunnel rock wall 1 are filled with anti-leakage foam filler 12. Specifically, in this embodiment, the anchor bolt adopts an expansion bolt chemical anchor bolt, which is fixed at 5cm to 10cm from the edge of the seepage drainage device, and a rubber ring is provided on the anchor bolt. The anti-leakage foam filler 12 adopts a polyurethane foam sealant, which can give full play to good bonding performance and good water curing performance in this environment, and can still play a good effect in the water diversion tunnel 3 with a large amount of water, thereby achieving effective filling and sealing of the tunnel gap, and further preventing water penetration and leakage.

[0044] Furthermore, since it is difficult to establish a stable connection between the drainage structure 5 and the tunnel rock wall 1, and it is difficult to ensure airtightness due to the influence of the uneven excavation section, in this embodiment, the rock wall around the seepage point 2 is first processed, and the leveling layer is determined by grinding or spraying concrete. Then, the drainage structure 5 and the water filtration structure 4 are fixed to the tunnel rock wall 1 by using anchor bolts and reserved fixed anchor bolt holes 9, and the joints 10 are filled with polyurethane foam sealant to form a well-sealed and impermeable overall structure.

[0045] Embodiment 2:

[0046] Combination Figure 5 As shown, this embodiment is a seepage drainage device for a water diversion tunnel. The difference between this embodiment and the first embodiment is that a plurality of drainage structures 5 can be freely assembled according to the area of ​​the water seepage point 2, and the drainage structures 5 are correspondingly connected with a water collecting structure and a water diversion pipe 6. In this embodiment, the size of the drainage structure 5, the size of the water collecting funnel 8 and the length of the water diversion pipe 6 are all determined by the location of the water seepage point 2, the size of the water diversion tunnel 3 and the length of the lining. The seepage drainage device in the first embodiment can better handle the seepage at a single seepage point 2 or a small area, but in the face of large-area seepage, the seepage drainage device can be installed by reserving the anchor bolt hole 9 and the anchor bolt, and the joints between the seepage drainage devices are filled and sealed with a polyurethane foam sealant, so that multiple sets of seepage drainage devices can be flexibly overlapped according to the seepage situation in the water diversion tunnel 3.

[0047] The implementation principle of a seepage drainage device for a water diversion tunnel is as follows:

[0048] Before the secondary lining concrete construction of a certain bin in the water diversion tunnel 3, when water seepage occurs at the seepage point 2 of the tunnel rock wall 1 and a jet-like water flow is generated, the device is installed at the seepage point 2, and the jet-like water flow is filtered through the water filtration structure 4, and then impacts the water retaining steel plate. By utilizing the structure of the water retaining steel plate itself, the seepage water flows downward along the groove of the water retaining steel plate in the drainage cavity 7 to the water collecting cavity of the water collecting funnel 8, and finally the seepage water is drained out of the bin by the water diversion pipe 6 at the bottom of the water collecting funnel 8 and flows out along the drainage ditch, thereby preventing the seepage water from gathering in the bin and affecting the pouring quality of the secondary lining concrete, thereby achieving effective drainage of seepage water in the water diversion tunnel 3 and reducing damage to the stability of the overall structure of the tunnel. In addition, the device has a simple structure and can be flexibly adjusted and arranged according to the seepage point 2.

[0049] At the same time, if a part of the drainage cavity 7 is blocked, due to the permeable layer 501 of the drainage structure 5, part of the water in the drainage cavity 7 can enter the permeable channel 502 through the permeable layer 501, and the seepage water further enters the water collecting cavity of the water collecting funnel 8 through the permeable channel 502, and is drained through the water diversion pipe 6, thereby improving the overall seepage and drainage capacity of the device.

[0050] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A seepage drainage device for a water diversion tunnel, characterized in that: include: A water filtering structure (4) is arranged on a tunnel rock wall (1) of a water diversion tunnel (3), the water filtering structure (4) covers a water seepage point (2) on the tunnel rock wall (1), and the water filtering structure (4) is used to filter water seeping out of the water seepage point (2); A water retaining and drainage structure (5) is arranged on the back surface of the water filtering structure (4) via a fixing member (13), and a drainage cavity (7) is formed between the water retaining and drainage structure (5) and the water filtering structure (4); A water collection structure is provided at the bottom of the water filtering structure (4) and the water blocking and drainage structure (5), wherein a water collection cavity communicating with the drainage cavity (7) is provided inside the water collection structure; A water diversion pipe (6) is arranged at the bottom of the water collection structure, the water diversion pipe (6) is connected to the water collection chamber, and the water diversion pipe (6) is used to guide and drain the water in the water collection chamber.

2. The seepage drainage device for a water diversion tunnel according to claim 1, characterized in that: The water retaining and drainage structure (5) comprises a water permeable layer (501), a water permeable channel (502), and a water stop layer (503); the drainage cavity (7) is formed between the water permeable layer (501) and the water filtering structure (4); the water permeable channel (502) is formed between the water permeable layer (501) and the water stop layer (503); the water permeable channel (502) is connected to the water collecting cavity; water in the drainage cavity (7) can enter the water permeable channel (502) through the water permeable layer (501).

3. The seepage drainage device for a water diversion tunnel according to claim 2, characterized in that: The permeable layer (501) includes a permeable membrane made of geotextile material, and the water-stop layer (503) includes a water-retaining steel plate, which is a corrugated color steel tile steel plate. A water-stop membrane is provided on the side of the water-retaining steel plate facing the permeable membrane, and the water-stop membrane is made of rubber, PVC or polyethylene. The permeable channel (502) is formed between the permeable membrane and the water-stop membrane.

4. The seepage drainage device for a water diversion tunnel according to claim 2, characterized in that: A plurality of the water retaining and drainage structures (5) can be assembled according to the area of ​​the water seepage point (2), and the water retaining and drainage structures (5) are correspondingly connected to the water collection structure and the water diversion pipe (6).

5. The seepage drainage device for a water diversion tunnel according to claim 1, characterized in that: The water collection structure comprises a water collection funnel (8), a sleeve steel pipe (601) and a water diversion pipe (6); the water collection funnel (8) is arranged at the bottom of the water filtering structure (4) and the water blocking and drainage structure (5); the sleeve steel pipe (601) is penetrated through the bottom of the water collection funnel (8); the water diversion pipe (6) is a steel wire corrugated pipe; the end of the sleeve steel pipe (601) away from the water collection chamber is threadedly connected to the steel wire corrugated pipe.

6. The seepage drainage device for a water diversion tunnel according to claim 5, characterized in that: A filter membrane (602) is provided at the end of the sleeve steel pipe (601) facing the water collecting chamber.

7. The seepage drainage device for a water diversion tunnel according to claim 1, characterized in that: The water filtration structure (4) comprises a water filtration membrane (401).

8. The seepage drainage device for a water diversion tunnel according to claim 1, characterized in that: The fixing member (13) is an anchor bolt, a fixing anchor bolt hole (9) is provided on the tunnel rock wall (1), the seepage drainage device is fixed to the tunnel rock wall (1) via the anchor bolt, and the joint portion (10) between the seepage drainage device and the tunnel rock wall (1) is filled with an anti-leakage foam filler (12).

9. A seepage drainage device for a water diversion tunnel according to claim 8, characterized in that: The anchor bolt adopts an expansion bolt chemical anchor bolt, a rubber ring is provided on the anchor bolt, and the anti-leakage foam filler (12) adopts a polyurethane foam sealant.

10. The seepage drainage device for a water diversion tunnel according to claim 8, characterized in that: At the connection between the tunnel rock wall (1) and the water seepage drainage device, the rock periphery around the water seepage point (2) is processed into a flat surface by spraying concrete or grinding.

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