Tunnel integral type prefabricated inverted arch drainage structure

Abstract

The utility model relates to the technical field of tunnels, in particular to an integral prefabricated inverted arch drainage structure of a tunnel. By arranging the first inverted arch block and the second inverted arch block, water in the tunnel flows into the second drainage ditch through the first drainage channel and flows into the fourth drainage ditch through the third drainage channel, and water in the fourth drainage ditch enters the second drainage ditch through the second water conveying channel; water in the second drainage ditch flows into the first drainage ditch through the second drainage channel, and water in the third drainage ditch also flows into the first drainage ditch through the second water delivery channel, so that water in the tunnel is collected in the first drainage ditch, silt in the collected water can be precipitated at the bottom of the first drainage ditch, and the silt can be conveniently and intensively cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnels, in particular to an integral prefabricated inverted arch drainage structure for a tunnel. Background Art

[0002] Tunnels and underground projects are located in rock and soil layers. When tunnels pass through or are close to aquifers, they are constantly affected by the infiltration of groundwater. If the drainage structure is not perfect, groundwater will invade the tunnel and cause tunnel leakage.

[0003] Tunnels built in the past were relatively backward in drainage concepts, drainage materials, drainage processes and equipment, so the drainage system often had the following problems: fine particles in the surrounding rock can easily enter the drainage system, and due to the lack of effective removal measures, the drainage system is often blocked; in addition, the part above the arch can be set up with waterproof boards, geotextiles, drainage pipes and side ditches to drain the accumulated water into the central drainage ditch. The central drainage ditch is buried in the arch structure at the bottom of the tunnel and extends continuously along the length of the tunnel until it leads to the outside of the tunnel. It can effectively discharge the surrounding rock water above the tunnel arch, but there is no effective drainage method for the remaining surrounding rock water that gathers at the bottom of the tunnel and the fissure water from the surrounding area below the tunnel, and the arch structure at the bottom of the tunnel is often damaged. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an integral prefabricated inverted arch drainage structure for a tunnel, which is convenient for centralized cleaning of mud and sand in the water in the tunnel.

[0005] The utility model solves the technical problem by adopting a technical solution of an integral prefabricated inverted arch drainage structure for a tunnel, comprising a secondary lining, a cast-in-place arch foot and an inverted arch structure, wherein the secondary lining, the cast-in-place arch foot and the inverted arch structure form an annular structure, and the inverted arch structure comprises two first inverted arch blocks arranged side by side, and at least two second inverted arch blocks are arranged between the two first inverted arch blocks;

[0006] First cable trench side walls are arranged on both sides of the first inverted arch block, a first drainage ditch is arranged in the first inverted arch block, second drainage ditches are arranged on both sides of the first drainage ditch, a first drainage channel communicating with the second drainage ditch is arranged on the first cable trench side wall, and the first drainage ditch is communicated with the second drainage ditch through the second drainage channel;

[0007] Second cable trench side walls are arranged on both sides of the second inverted arch block, and the second cable trench side walls and the first cable trench side walls form cable trench walls. A third drainage ditch is arranged in the second inverted arch block, and fourth drainage ditches are arranged on both sides of the third drainage ditch. A third drainage channel connected with the fourth drainage ditch is arranged on the second cable trench side walls, and a partition rib for partitioning the third drainage ditch is arranged in the middle of the third drainage ditch. The third drainage ditch and the first drainage ditch form a first water transfer channel, and the fourth drainage ditch and the second drainage ditch form a second water transfer channel.

[0008] Furthermore, the upper surface of the first invert block is provided with inspection holes which are connected with the first drainage ditch and the second drainage ditch respectively.

[0009] Furthermore, the first drainage ditch is connected to the second drainage ditch through at least two second drainage channels, the second drainage channels are arranged up and down, and the bottom end of the lowest second drainage channel is on the same arc surface as the bottom end of the first drainage ditch and the bottom end of the second drainage ditch.

[0010] Furthermore, a fourth drainage channel is provided in the middle of the partition rib, and the fourth drainage channel is connected to the third drainage ditch and the bottom surface of the second inverted arch block.

[0011] Furthermore, a check valve is provided on the fourth drainage channel.

[0012] The beneficial effect of the utility model is that by arranging the first inverted arch block and the second inverted arch block, the water in the tunnel flows into the second drainage ditch through the first drainage channel and flows into the fourth drainage ditch through the third drainage channel, the water in the fourth drainage ditch enters the second drainage ditch through the second water transfer channel, the water in the second drainage ditch flows into the first drainage ditch through the second drainage channel, and the water in the third drainage ditch also flows into the first drainage ditch through the second water transfer channel, so that the water in the tunnel is gathered in the first drainage ditch, and the mud and sand in the water will settle at the bottom of the first drainage ditch after the gathering, which is convenient for the centralized cleaning of the mud and sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 is a schematic diagram of the first invert block;

[0015] Figure 3 This is a schematic diagram of the second invert block.

[0016] Figure numerals: 1-secondary lining; 2-cast-in-place arch foot; 3-inverted arch structure; 4-first inverted arch block; 5-second inverted arch block; 6-side wall of first cable trench; 7-first drainage ditch; 8-second drainage ditch; 9-first drainage channel; 10-second drainage channel; 11-side wall of second cable trench; 12-third drainage ditch; 14-third drainage channel; 15-partition rib; 16-first water transfer channel; 17-second water transfer channel; 18-inspection hole; 19-cable trench wall; 20-fourth drainage channel; 21-check valve. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] like Figure 1-Figure 3 As shown, Figure 1 The direction of the black arrow is the direction of water flow. The utility model tunnel integral prefabricated inverted arch drainage structure comprises a secondary lining 1, a cast-in-place arch foot 2 and an inverted arch structure 3. The secondary lining 1, the cast-in-place arch foot 2 and the inverted arch structure 3 form an annular structure. The inverted arch structure 3 comprises two first inverted arch blocks 4 arranged side by side, and at least two second inverted arch blocks 5 are arranged between the two first inverted arch blocks 4.

[0019] Among them, the secondary lining 1 is a cast concrete or reinforced concrete lining applied on the inner side of the primary support of the tunnel, and together with the primary support of the tunnel, it forms a composite lining; the invert structure 3 is prefabricated with reinforced concrete and is hoisted into the tunnel when in use; the cast-in-place arch foot 2 is a concrete structure cast between the invert structure 3 and the secondary lining 1 after the invert structure 3 and the secondary lining 1 are installed, and is used to connect the invert structure 3 and the secondary lining 1. After the construction is completed, the secondary lining 1, the cast-in-place arch foot 2 and the invert structure 3 form a ring structure.

[0020] First cable trench side walls 6 are arranged on both sides of the first inverted arch block 4, a first drainage ditch 7 is arranged in the first inverted arch block 4, second drainage ditches 8 are arranged on both sides of the first drainage ditch 7, a first drainage channel 9 communicating with the second drainage ditch 8 is arranged on the first cable trench side wall 6, and the first drainage ditch 7 is communicated with the second drainage ditch 8 through a second drainage channel 10;

[0021] The first cable trench side wall 6 and the second cable trench side wall 11 form a cable trench wall 19, and the cable trench wall 19 and the cast-in-place arch foot 2 finally form a cable trench. The first cable trench side wall 6 and the first inverted arch block 4 are integrally formed; the extension direction of the first drainage ditch 7 is the length direction of the tunnel, the bottom surface of the first drainage ditch 7 is an arc surface, and the lowest point is located in the middle of the first drainage ditch 7; the extension direction of the second drainage ditch 8 is also the length direction of the tunnel, the bottom surface of the second drainage ditch 8 is an arc surface, and the side of the second drainage ditch 8 close to the first drainage ditch 7 is lower than the side of the second drainage ditch 8 away from the first drainage ditch 7; the first drainage channel 9 is used to drain the water entering the cable trench into the second drainage ditch 8, and the second drainage channel 10 is used to drain the water in the second drainage ditch 8 into the first drainage ditch 7; the first drainage channel 9 and the second drainage channel 10 are both prefabricated when manufacturing the first inverted arch block 4.

[0022] Second cable trench side walls 11 are arranged on both sides of the second inverted arch block 5, and the second cable trench side walls 11 and the first cable trench side walls 6 form a cable trench wall 19. A third drainage ditch 12 is arranged in the second inverted arch block 5, and fourth drainage ditches 13 are arranged on both sides of the third drainage ditch 12. A third drainage channel 14 connected with the fourth drainage ditch 13 is arranged on the second cable trench side wall 11, and a partition rib 15 for partitioning the third drainage ditch 12 is arranged in the middle of the third drainage ditch 12. The third drainage ditch 12 and the first drainage ditch 7 form a first water transfer channel 16, and the fourth drainage ditch 13 and the second drainage ditch 8 form a second water transfer channel 17.

[0023] The third drainage ditch 12 extends in the length direction of the tunnel, the bottom surface of the third drainage ditch 12 is an arc surface, and the lowest point is located in the middle of the third drainage ditch 12; the partition rib 15 is located in the middle of the third drainage ditch 12, dividing the third drainage ditch 12 into two independent chambers, and the partition rib 15 also plays a supporting role to ensure the stability of the third drainage ditch 12. The cross-section of the third drainage ditch 12 is the same as the cross-section shape and size of the first drainage ditch 7; the fourth drainage ditch 13 extends in the length direction of the tunnel as well, the bottom surface of the fourth drainage ditch 13 is an arc surface, and the side of the fourth drainage ditch 13 close to the third drainage ditch 12 is lower than the side of the fourth drainage ditch 13 away from the third drainage ditch 12. The cross section of the fourth drainage ditch 13 is the same as the cross section of the second drainage ditch 8; the third drainage channel 14 is used to discharge the water entering the cable trench into the fourth drainage ditch 13, and enter the second drainage ditch 8 through the second water delivery channel 17, and then enter the first drainage ditch 7 through the second drainage channel 10. It should be noted that the end of the second water delivery channel 17 is closed, which is more conducive to the water in the second drainage ditch 8 entering the first drainage ditch 7; the water in the third drainage ditch 12 is also discharged into the first drainage ditch 7 through the first water delivery channel 16, and the first drainage ditch 7 realizes the collection of water. After the collection, the silt in the water will settle at the bottom of the first drainage ditch 7, which is convenient for the centralized cleaning of the silt. The utility model is not only suitable for the drainage of newly built tunnels, but also for the reconstruction of old tunnels. When the initial invert of the old tunnel is damaged, the damaged initial invert is excavated, and the utility model is set between two intact initial inverts, so that the central drainage ditch of the two initial inverts is opposite to the two first drainage ditches 7 of the utility model, so that the tunnel drainage can be realized.

[0024] In order to facilitate the cleaning of the sediment in the first drainage ditch 7 and the second drainage ditch 8; further, see Figure 1 The upper surface of the first invert block 4 is provided with an inspection hole 18 which is connected with the first drainage ditch 7 and the second drainage ditch 8 respectively.

[0025] Since the water in the second water delivery channel 17 will enter the first drainage ditch 7 through the second drainage ditch 8, when the amount of water is too large, the drainage capacity of one second drainage channel 10 may not be enough. Figure 2 , the first drainage ditch 7 is connected to the second drainage ditch 8 through at least two second drainage channels 10, and the second drainage channels 10 are arranged up and down, and the bottom end of the second drainage channel 10 at the bottom is respectively on the same arc surface as the bottom end of the first drainage ditch 7 and the bottom end of the second drainage ditch 8. The bottom end of the second drainage channel 10 at the bottom is respectively on the same arc surface as the bottom end of the first drainage ditch 7 and the bottom end of the second drainage ditch 8, so that water can be prevented from remaining at the bottom of the second drainage ditch 8, and the water can be completely discharged into the first drainage ditch 7. When the amount of water is large, the water can also be transported to the first drainage ditch 7 through multiple second drainage channels 10 at the same time.

[0026] In order to drain the water from the bottom of the tunnel in time, see Figure 3 A fourth drainage channel 20 is provided in the middle of the partition rib 15, and the fourth drainage channel 20 is connected to the third drainage ditch 12 and the bottom surface of the second invert block 5. When water gathers at the bottom of the tunnel, the fourth drainage channel 20 can drain the water at the bottom of the tunnel into the third drainage ditch 12.

[0027] In order to prevent the water in the third drainage ditch 12 from flowing back to the bottom of the tunnel, further see Figure 3 The fourth drainage channel 20 is provided with a check valve 21. The check valve 21 is a one-way valve that only allows the water at the bottom of the tunnel to be discharged into the third drainage ditch 12.

[0028] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A tunnel integral prefabricated inverted arch drainage structure, comprising a secondary lining (1), a cast-in-place arch foot (2) and an inverted arch structure (3), wherein the secondary lining (1), the cast-in-place arch foot (2) and the inverted arch structure (3) form an annular structure, characterized in that: The inverted arch structure (3) comprises two first inverted arch blocks (4) arranged side by side, and at least two second inverted arch blocks (5) are arranged between the two first inverted arch blocks (4); First cable trench side walls (6) are arranged on both sides of the first inverted arch block (4), a first drainage ditch (7) is arranged inside the first inverted arch block (4), second drainage ditch (8) are arranged on both sides of the first drainage ditch (7), a first drainage channel (9) communicating with the second drainage ditch (8) is arranged on the first cable trench side wall (6), and the first drainage ditch (7) and the second drainage ditch (8) are communicated through the second drainage channel (10); Second cable trench side walls (11) are arranged on both sides of the second inverted arch block (5), and the second cable trench side walls (11) and the first cable trench side walls (6) form a cable trench wall (19). A third drainage ditch (12) is arranged in the second inverted arch block (5), and fourth drainage ditches (13) are arranged on both sides of the third drainage ditch (12). A third drainage channel (14) communicating with the fourth drainage ditch (13) is arranged on the second cable trench side walls (11), and a partition rib (15) for partitioning the third drainage ditch (12) is arranged in the middle of the third drainage ditch (12), the third drainage ditch (12) and the first drainage ditch (7) form a first water conveyance channel (16), and the fourth drainage ditch (13) and the second drainage ditch (8) form a second water conveyance channel (17).

2. The tunnel integral prefabricated inverted arch drainage structure according to claim 1, characterized in that: The upper surface of the first invert block (4) is provided with inspection holes (18) which are respectively connected to the first drainage ditch (7) and the second drainage ditch (8).

3. The tunnel integral prefabricated inverted arch drainage structure according to claim 2, characterized in that: The first drainage ditch (7) and the second drainage ditch (8) are connected through at least two second drainage channels (10), and the second drainage channels (10) are arranged in an upper and lower manner, and the bottom end of the lowermost second drainage channel (10) is respectively on the same arc surface as the bottom end of the first drainage ditch (7) and the bottom end of the second drainage ditch (8).

4. The tunnel integral prefabricated inverted arch drainage structure according to claim 1, characterized in that: A fourth drainage channel (20) is provided in the middle of the partition rib (15), and the fourth drainage channel (20) is connected to the third drainage ditch (12) and the bottom surface of the second inverted arch block (5).

5. The tunnel integral prefabricated inverted arch drainage structure according to claim 4, characterized in that: The fourth drainage channel (20) is provided with a check valve (21).

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