Pressure-regulating and storage-regulating diversion tunnel structure

Abstract

The invention discloses a pressure-regulating and storage-regulating diversion tunnel structure which comprises a water inlet, a tunnel body section and an outlet section, the outlet section is provided with a pressure regulating chamber, the tunnel body section comprises a primary supporting structure and a protective layer, a support is pre-buried in the primary supporting structure and connected with the protective layer, and the pressure regulating chamber is arranged in the primary supporting structure. A concrete layer is formed between the protective layer and the primary supporting structure in a pouring mode. The lining steel pipe is arranged on the tunnel body section of the tunnel to serve as a protective layer, the concrete structure is poured between the lining steel pipe and the surrounding rock or the primary supporting structure in a layered mode, and the lining steel pipe can prevent water flow from scouring the concrete structure. The supports pre-buried in surrounding rock and a primary supporting structure are connected with the lining steel pipe, the lining steel pipe is subjected to the additional gravity effect during concrete pouring, the supports can avoid excessive deformation in the installation and construction process, meanwhile, in the operation process of a tunnel, the supports can also play a role in fixing and supporting the lining steel pipe, and therefore the supporting effect of the lining steel pipe is improved. And cracks between the concrete and the lining steel pipe caused by stress of the lining steel pipe are reduced.

Description

Technical Field

[0001] The invention relates to a pressure regulating and storage water diversion tunnel structure. Background Art

[0002] A diversion tunnel is a cave-like passage formed in a mountain or underground for conveying water. During the construction of a diversion tunnel, shield machines or blasting excavation methods are used, and the tunnel body is supported in a timely manner. Common support methods include reinforced concrete lining structures. The water inlet of a pressure-regulating and storage-regulating diversion tunnel is generally set in a reservoir, which has the function of storing and regulating water. During the water storage period, the height difference between the water surface and the water inlet is large, the water pressure at the water inlet is large, and the water flow rate in the tunnel is fast, which will cause scouring and erosion of the concrete structure of the tunnel, causing damage to the tunnel body. Summary of the invention

[0003] In view of the above shortcomings, the object of the present invention is to provide a pressure-regulating and water-storage diversion tunnel structure that is resistant to scour and erosion.

[0004] To this end, a pressure-regulating and water-storage tunnel structure of the present invention comprises a water inlet, a tunnel section and an outlet section, the outlet section is provided with a pressure-regulating chamber, the tunnel section comprises a primary support structure and a protective layer, a bracket is pre-embedded in the primary support structure, the bracket is connected to the protective layer, and a concrete layer is cast between the protective layer and the primary support structure.

[0005] Furthermore, the tunnel body section is circular, and the protective layer includes a plurality of circular lining steel pipes connected end to end.

[0006] Furthermore, the lining steel pipe is provided with a plurality of circular reinforcing ribs surrounding the steel pipe, and the bracket is connected to the lining steel pipe via a connecting portion, and the connecting portion includes a first connecting piece fixed on the reinforcing rib and a second connecting piece fixed on the bracket, and the first connecting piece and the second connecting piece cooperate to connect the bracket to the tunnel body section.

[0007] Furthermore, one of the first connecting member and the second connecting member is provided with a slot, and the other includes a connecting column for being inserted into the slot and a limit block fixed at the end of the connecting column, the connecting column extends into the slot and the limit block cooperates with the surfaces on both sides of the slot to connect the bracket to the hole body section.

[0008] Furthermore, the card slot is arranged on the connecting seat, the connecting seat is fixed with the reinforcing rib or is formed integrally, the connecting seat is provided with a groove cooperating with the limiting block, and a guiding inclined surface is arranged on the side of the groove.

[0009] Furthermore, a card slot is provided in the second connecting member, and the card slot is arranged in the connecting seat. The connecting seat is provided with a guiding inclined surface cooperating with the connecting column. The connecting seat includes a T-shaped card block, and the card block cooperates with the T-slot provided in the bracket. The T-slot reserves an adjustment space on the side of the T-block, so that the connecting seat can be adjusted relative to the first connecting member.

[0010] A card slot is provided in the second connecting member, and one end of the connecting column is connected to the annular base. An annular groove matching the annular base is provided in the first connecting member, and the length of the annular groove is greater than the length of the annular base, so that the annular base can be adjusted in the annular groove. A through hole is provided at a position opposite to the first connecting member and the connecting column, and the length of the through hole is greater than the diameter of the connecting column, so that the connecting column can be adjusted along the length direction of the through hole.

[0011] Furthermore, the thickness of the annular base is smaller than the height of the annular groove, and corresponding concave and convex surfaces are arranged on the surfaces of the annular groove and the annular base. When an interaction force is generated between the first connecting member and the second connecting member, the concave and convex surfaces between the annular groove and the annular base cooperate with each other so that the annular base no longer moves.

[0012] Furthermore, an adjustment hole corresponding to the annular base is provided on a side of the first connecting member facing the inner lining steel pipe, an adjustment groove corresponding to the adjustment hole is provided on the annular base, and a grouting hole matching the adjustment hole is provided on the inner lining steel pipe.

[0013] Furthermore, the hole body section is formed by the following method:

[0014] S1: Drill holes at predetermined locations on the tunnel wall to set anchor rods, and perform primary support. The anchor rods are fixed to the supports, and steel bars are laid;

[0015] S2: Use a hydraulic transport trolley to transport the lined steel pipe, adjust the position of the lined steel pipe and support the inner wall of the lined steel pipe on the transport trolley;

[0016] S3: After the lining steel pipe is transported to the place, the second connecting piece on the bracket is connected with the first connecting piece on the lining steel pipe to fix and support the lining steel pipe and the adjacent inner steel pipe;

[0017] S4: Pour the concrete layer between the lining steel pipe and the primary support in layers, and apply paint on the inner wall of the lining steel pipe.

[0018] Beneficial technical effects of the present invention:

[0019] (1) A pressure regulating and storage water diversion tunnel structure of the present invention is provided with a pressure regulating chamber to reduce the influence of the water hammer effect, and a lining steel pipe is provided in the tunnel section of the tunnel as a protective layer. The lining steel pipe can be made of corrosion-resistant stainless steel pipe. The concrete structure is cast in layers between the lining steel pipe and the surrounding rock or the primary support structure. The lining steel pipe can effectively prevent the water flow from directly scouring the concrete structure, thereby extending the service life and reducing maintenance. The bracket pre-buried in the surrounding rock and the primary support structure is connected to the lining steel pipe. When the concrete is poured, the lining steel pipe will be subjected to additional gravity. The bracket can avoid excessive deformation during the installation and construction process. At the same time, during the operation of the tunnel, it can also play a role in fixing and supporting the lining steel pipe, reducing the force on the lining steel pipe and causing cracks between the concrete and the lining steel pipe.

[0020] In a specific embodiment of the present invention, a first connecting piece and a second connecting piece are provided to realize the connection between the bracket and the inner lining steel pipe. The cooperation between the first connecting piece and the slot solves the problem of how to position and splice the first connecting piece and the second connecting piece during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a specific embodiment of a water diversion tunnel for realizing the present invention;

[0022] Figure 2 This is a schematic diagram of the construction of the lined steel pipe;

[0023] Figure 3 It is a schematic diagram of the internal support of the lined steel pipe;

[0024] Figure 4 This is a schematic diagram of the first connecting member in Example 1;

[0025] Figure 5 for Figure 4 A schematic diagram of the connection between the middle limit block and the first connecting member;

[0026] Figure 6 A schematic diagram of the guide bevel and groove;

[0027] Figure 7 is a schematic diagram of Example 2;

[0028] Figure 8 is a schematic diagram of Example 3;

[0029] Fig. 9 is a schematic diagram of a concave and convex surface;

[0030] Fig.10 Schematic diagram of the through hole on the first connecting member.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. water inlet; 2. tunnel section; 3. outlet section; 301. pressure regulating chamber; 4. inner lining steel pipe; 5. concrete layer; 6. bracket; 7. reinforcing rib; 8. first connecting piece; 9. second connecting piece; 10. connecting column; 11. limit block; 12. slot; 13. cushion block; 14. guide slope; 15. groove; 16. block; 17. T-slot; 18. connecting seat; 19. annular groove; 20. annular base; 21. through hole; 22. concave and convex surface; 23. adjustment hole; 24. adjustment slot; 25. transport trolley. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0033] Reference Figure 1 , Figure 2 and Figure 3 As shown, a pressure regulating and storage water diversion tunnel structure of the present invention includes a water inlet 1, a tunnel section 2 and an outlet section 3, the outlet section 3 is provided with a pressure regulating chamber 301, the tunnel section 2 includes a primary support structure and a protective layer, a bracket 6 is embedded in the primary support structure, the bracket 6 is connected to the protective layer, and a concrete layer 5 is cast between the protective layer and the primary support structure. In this embodiment, the water diversion tunnel is provided with an inlet building, the inlet building includes a trash grille, a bell mouth and a gradient section for smoothing the water flow, and also includes a gate and an opening and closing mechanism. The tunnel section 2 is circular, and mainly adopts a reinforced concrete structure as a permanent support. When the tunnel is excavated, the primary support is first set up. The primary support can adopt sprayed anchor support, drilling holes in the surrounding rock to set anchor rods, and spraying quick-setting concrete on the tunnel wall. The bracket 6 and the anchor rod are set at a predetermined position, and the bracket 6 is fixed on the anchor rod. The primary support can also adopt a concrete structure. A cylindrical protective layer is provided on the inner wall of the reinforced concrete structure. In this embodiment, a stainless steel lining steel pipe 4 is provided. For ease of installation, the length of each section of the lining steel pipe 4 is generally more than ten meters, and the diameter is determined according to the size of the tunnel. The joints between adjacent lining steel pipes 4 are fixed by welding, and the surface of the lining steel pipe can be coated to improve the anti-scouring and erosion performance of the tunnel body. Due to the different thermal expansion and contraction coefficients between the lining steel pipe and the concrete structure, cracks are prone to occur between the lining steel pipe and the concrete, and during the construction process, the lining steel pipe is subject to the additional influence of the concrete gravity and is prone to deformation. In this embodiment, the bracket 6 is connected to the lining steel pipe 4, and the bracket 6 is connected to the anchor rod. The lining steel pipe 4 is supported and fixed during the construction process and long-term use, reducing deformation and cracks under the action of gravity. The outlet section 3 can be connected to the aqueduct, and the pressure regulating chamber can be compressed air, with a compressed air cushion provided on the top.

[0034] In the above embodiment, referring to Figure 2 As shown, the inner lining steel pipe 4 is provided with a plurality of circular reinforcing ribs 7 surrounding the inner lining steel pipe. The inner lining steel pipe 4 is relatively heavy and is easily deformed under the influence of its own weight during transportation and storage. The reinforcing ribs 7 can enhance its structural strength and reduce the deformation of the inner lining steel pipe. Figure 4 As shown, the bracket 6 is connected to the lining steel pipe 4 through a connecting portion, and the connecting portion includes a first connecting member 8 fixed on the reinforcing rib 7 and a second connecting member 9 fixed on the bracket 6. The first connecting member 8 and the second connecting member 9 cooperate to connect the bracket 6 to the tunnel section 2. The connecting portion can be provided only on part of the reinforcing ribs 7 or all of the reinforcing ribs 7. In Example 1, the first connecting member 8 includes a connecting seat 18 integrally formed with the reinforcing rib 7, and the second connecting member 9 includes a connecting column 10 fixed to the bracket 6, and a limiting block 11 is provided at the end of the connecting column 10. The connecting column 10 and the limiting block 11 form a T-shaped structure similar to a bolt as a whole, and a plurality of slots 12 are provided on the connecting seat 18. The connecting column 10 is inserted into the slot 12, and the diameter of the limiting block 11 is greater than the width of the slot 12, thereby realizing the connection between the bracket 6 and the lining steel pipe 4. The connecting seat 18 can also be configured as Figure 4 The ring structure shown may also be a block structure, and a plurality of block structures corresponding to the bracket 6 are used to cooperate with the corresponding bracket 6. Figure 5 As shown, the lower surface of the connecting seat 18 can fix the cushion block 13, and the limiting block 11 acts on the cushion block 13. Figure 6 As shown, the side of the cushion block 13 or the connecting seat 18 that cooperates with the limit block 11 can be provided with a guiding inclined surface 14 and a groove 15 that cooperates with the limit block 11. The guiding inclined surface 14 can be selected to produce an extrusion effect with the limit block 11 or not to produce an extrusion effect when installed. The guiding inclined surface 14 contacts the limit block 11 or leaves a gap. Figure 2 and Figure 3 After the inner support structure shown is removed, the inner lining steel pipe 4, under the action of its own weight and the gravity of concrete, the guide slope 14 and the stop block 11 produce an extrusion effect, and the groove 15 cooperates with the stop block 11. In this embodiment, the height of each slot 12 is arranged from low to high to prevent the slot 12 from being blocked by the connecting column 10 and the stop block 11 during transportation. The slot 12 and the connecting column 10 are at least arranged on the top of the tunnel section 2, and can also be arranged on the side wall of the tunnel section.

[0035] Figure 7The specific embodiment 2 is shown, which is basically the same as the embodiment 1, except that a connection seat 18 is provided in the second connection member 9, a slot 12 is provided on the connection seat 18, and a guide slope 14 is provided on the connection seat 18 to cooperate with the connection column 10. The connection seat 18 includes a T-shaped block 16, and the block 16 cooperates with a T-shaped slot 17 provided in the bracket 6. The T-shaped slot 17 reserves an adjustment space on the side of the T-shaped block, so that the connection seat 18 can be adjusted relative to the first connection member 8. In the embodiment 1, when the lining steel pipe is installed, the installation position of the bracket 6 and the position of the lining steel pipe 4 need to be accurately corrected in advance, and the installation is difficult. In the embodiment 2, the block 16 can be adjusted and moved in the T-shaped slot 17 to a certain extent. When the connection column 10 of the first connection member 8 contacts the guide slope 14 of the connection seat 18, the lining steel pipe 4 moves forward slowly, and the guide slope 14 is squeezed by the connection column 10 and moves to one side until the slot 12 is aligned with the connection column 10, thereby realizing the positioning and adjustment functions. In fact, the bracket 6 provides support and prevents deformation of the lining steel pipe 4 during the construction process. After the lining steel pipe 4 is transported to the place, the end of the lining steel pipe 4 that contacts the adjacent steel pipe can be fixed to the adjacent lining steel pipe 4 by the fixing method of the existing technology, and a temporary support structure will be set at the other end as the main force-bearing mechanism. When the concrete pouring is completed, the bracket 6 and the corresponding connecting seat 18 are fixed in the poured concrete, and the bracket 6 plays a permanent supporting role. In Example 1, when the lining steel pipe 4 is transported by a hydraulic transport trolley 25, the connecting column 10 on the first connecting member 8 can pass through the slot 12, the lining steel pipe 4 contacts and is fixed to the adjacent lining steel pipe 4, and the corresponding connecting column 10 enters the corresponding slot 12.

[0036] Figure 8 , Fig. 9 , Fig.10Specific embodiment 3 is shown, which is basically the same as embodiment 1, except that, in embodiment 3, a card slot 12 is provided on the second connecting member 9 of the bracket 6, a connecting seat 18 is provided on the reinforcing rib 7, an annular groove 19 is provided inside the connecting seat 18, an annular base 20 is provided in the annular groove 19, the length of the annular base 20 is less than the length of the annular groove 19, and the annular base 20 can be adjusted in the annular groove 19, and a through hole 21 is provided at a position opposite to the first connecting member 8 and the connecting column 10, and the length of the through hole 21 is greater than the diameter of the connecting column 10, so that the connecting column 10 can be adjusted along the length direction of the through hole 21. The adjustment method can refer to the adjustment method of the guide slope and the connecting column in embodiment 2. In Example 3, when the lining steel pipe 4 is transported by a hydraulic transport trolley, the connecting column 10 and the bracket 6 are staggered at a certain angle so that the bracket 6 will not interfere with the movement of the connecting column 10. When the lining steel pipe 4 is close to the adjacent lining steel pipe, the annular base 20 is adjusted to a predetermined angle so that the connecting column 10 is aligned with the second connecting piece 9 of the bracket 6, and the lining steel pipe is continued to be moved to contact and fix the adjacent lining steel pipe, and the first connecting piece 8 and the second connecting piece 9 cooperate.

[0037] In the above-mentioned embodiment 3, the thickness of the annular base 20 is less than the height of the annular groove 19, and the corresponding annular groove 19 and the annular base 20 are provided with a concave-convex surface 22. When the interaction force is generated between the first connecting member 8 and the second connecting member 9, the concave-convex surface 22 between the annular groove 19 and the annular base 20 cooperates with each other so that the annular base 20 does not move. When the internal support of the lining steel pipe 4 is withdrawn, the steel pipe will be slightly deformed, so that the concave-convex surface 22 of the annular groove 19 and the annular base 20 cooperates, and the bracket 6 plays a supporting role.

[0038] In the above embodiment, another adjustment method is also included. An adjustment hole 23 corresponding to the annular base 20 is provided on a side of the first connecting member 8 facing the lining steel pipe 4. An adjustment groove 24 corresponding to the adjustment hole 23 is provided on the annular base 20. A grouting hole matching the adjustment hole 23 is provided on the lining steel pipe 4. The annular base 20 is moved by inserting a tool into the adjustment groove 24, or a nut or stud is fixed in the adjustment groove 24. A tool is used to form a threaded connection with the nut or stud in the adjustment groove, and the annular base 20 is rotated for adjustment.

[0039] The present invention also includes the construction method of the above-mentioned lining steel pipe 4 and tunnel body section 2, referring to Figure 2 and Figure 3 As shown, the following steps are included:

[0040] S1: After the tunnel is excavated, holes are drilled at predetermined positions of the tunnel wall to set anchor rods, and primary support is performed. The primary support may be sprayed anchor support or steel bars are laid and concrete is poured. The bracket 6 is buried at a predetermined position in the reinforced concrete and fixed with the anchor rods;

[0041] S2: Use the hydraulic transport trolley 25 to transport the lined steel pipe 4, adjust the position of the lined steel pipe 4 and let the transport trolley 25 pass through the steel pipe, the inner support structure of the transport trolley 25 is supported on the inner wall of the lined steel pipe 4, keep the lined steel pipe stable and transport it to the predetermined position;

[0042] S3: After the lining steel pipe 4 is transported to the place, the second connecting piece 9 on the bracket 6 is connected with the first connecting piece 8 on the lining steel pipe 4, the lining steel pipe 4 is fixed with the adjacent lining steel pipe, a temporary support is set up at the outer end of the lining steel pipe 4, and the joint of the lining steel pipe is welded;

[0043] S4: pour the concrete layer 5 between the inner steel pipe and the primary support in layers, and apply paint on the inner wall of the lining steel pipe 4.

[0044] In the above method, it also includes prefabricating the lining steel pipe 4 in the factory and transporting it to the tunnel. Step S4 also includes setting up a concrete pumping device and a pumping pipeline. The concrete adopts self-compacting concrete. The lining steel pipe 4 is also provided with a grouting pipe or grouting hole for pumping concrete between the lining pipe and the tunnel wall.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A pressure regulating and storage water diversion tunnel structure, comprising a water inlet, a tunnel section and an outlet section, characterized in that: The outlet section is provided with a pressure regulating chamber, and the tunnel section includes a primary supporting structure and a protective layer. A bracket is embedded in the primary supporting structure, and the bracket is connected to the protective layer. A concrete layer is cast between the protective layer and the primary supporting structure.

2. A pressure regulating and storage water diversion tunnel structure according to claim 1, characterized in that: The tunnel body section is circular, and the protective layer includes a plurality of circular lining steel pipes connected end to end.

3. A pressure regulating and storage water diversion tunnel structure according to claim 2, characterized in that: The lining steel pipe is provided with a plurality of circular reinforcing ribs surrounding the steel pipe. The bracket is connected to the lining steel pipe via a connecting portion. The connecting portion includes a first connecting piece fixed on the reinforcing rib and a second connecting piece fixed on the bracket. The first connecting piece and the second connecting piece cooperate to connect the bracket to the tunnel body section.

4. A pressure regulating and storage water diversion tunnel structure according to claim 3, characterized in that: One of the first connecting member and the second connecting member is provided with a slot, and the other includes a connecting column for being inserted into the slot and a limit block fixed at the end of the connecting column. The connecting column extends into the slot and the limit block cooperates with the surfaces on both sides of the slot to connect the bracket to the hole body section.

5. A pressure regulating and storage water diversion tunnel structure according to claim 4, characterized in that: The clamping groove is arranged on the connecting seat, the connecting seat is fixed with the reinforcing rib or is formed integrally, the connecting seat is provided with a groove matched with the limiting block, and a guiding inclined surface is arranged on the side of the groove.

6. A pressure regulating and storage water diversion tunnel structure according to claim 4, characterized in that: A card slot is provided in the second connecting member, and the card slot is arranged in the connecting seat. The connecting seat is provided with a guiding inclined surface cooperating with the connecting column. The connecting seat includes a T-shaped card block, and the card block cooperates with the T-slot provided in the bracket. The T-slot reserves an adjustment space on the side of the T-block, so that the connecting seat can be adjusted relative to the first connecting member.

7. A pressure regulating and storage water diversion tunnel structure according to claim 4, characterized in that: A card slot is provided in the second connecting member, and one end of the connecting column is connected to the annular base. An annular groove matching the annular base is provided in the first connecting member, and the length of the annular groove is greater than the length of the annular base, so that the annular base can be adjusted in the annular groove. A through hole is provided at a position opposite to the first connecting member and the connecting column, and the length of the through hole is greater than the diameter of the connecting column, so that the connecting column can be adjusted along the length direction of the through hole.

8. A pressure regulating and storage water diversion tunnel structure according to claim 7, characterized in that: The thickness of some of the annular bases is smaller than the height of the annular grooves, and corresponding concave and convex surfaces are arranged on the surfaces of the annular grooves and the annular bases. When interaction force is generated between the first connecting member and the second connecting member, the concave and convex surfaces between the annular grooves and the annular bases cooperate with each other so that the annular bases no longer move.

9. A pressure regulating and storage water diversion tunnel structure according to claim 7 or 8, characterized in that: An adjustment hole corresponding to the annular base is provided on one side of the first connecting piece facing the inner lining steel pipe, an adjustment groove corresponding to the adjustment hole is provided on the annular base, and a grouting hole matching the adjustment hole is provided on the inner lining steel pipe.

10. A pressure regulating and storage water diversion tunnel structure according to any one of claims 4 to 8, characterized in that: The hole body section is formed by the following method: S1: Drill holes at predetermined locations on the tunnel wall to set anchor rods, and perform primary support. The anchor rods are fixed to the supports, and steel bars are laid; S2: Use a hydraulic transport trolley to transport the lined steel pipe, adjust the position of the lined steel pipe and support the inner wall of the lined steel pipe on the transport trolley; S3: After the lining steel pipe is transported to the place, the second connecting piece on the bracket is connected with the first connecting piece on the lining steel pipe to fix and support the lining steel pipe and the adjacent inner steel pipe; S4: Pour the concrete layer between the lining steel pipe and the primary support in layers, and apply paint on the inner wall of the lining steel pipe.

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