Water diversion tunnel supporting structure of pumped storage power station and mounting method of water diversion tunnel supporting structure

Abstract

The invention discloses a pumped storage power station diversion tunnel supporting structure and a mounting method thereof. The supporting structure comprises an upper arc-shaped supporting plate, a lower arc-shaped supporting plate, a fixing ring, a fixing rod, an adjusting supporting rod, a connecting mechanism and an anchor rod. The upper arc-shaped supporting plate and the lower arc-shaped supporting plate define a circular ring structure and are fixed through a connecting mechanism, the fixing ring is located at the center of the circular ring structure, the upper arc-shaped supporting plate is fixedly connected with the circular ring through a fixing rod, and the lower arc-shaped supporting plate is fixedly connected with the circular ring through symmetrically-arranged adjusting supporting rods; the annular structure is fixed to the diversion tunnel through a plurality of anchor rods. The pressure in different directions can be effectively dispersed and borne, disassembly and assembly are convenient, and the repeated utilization rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy projects, and particularly relates to a support structure for a water conveyance tunnel of a pumped-storage power station and an installation method thereof. Background Technique

[0002] As an important energy storage method, the water conveyance tunnel of a pumped-storage power station is a key passage connecting the upper and lower reservoirs and realizing the conversion of water energy. In actual projects, the water conveyance tunnel often has to pass through complex geological areas and faces challenges from various adverse factors.

[0003] Traditional support structures for water conveyance tunnels are mostly single lining forms, such as simple concrete lining. This kind of support structure performs poorly in withstanding multi-directional pressures. The water conveyance tunnel not only has to bear the weight of the overlying rock mass on the top, but also is subjected to lateral extrusion from the rock masses on both sides and the scouring action of the bottom water flow, etc.; moreover, the traditional support structure has a low reusable rate. Due to the mainly used connection methods such as welding and on-site casting, it is easy to damage components during demolition. Summary of the Invention

[0004] In view of this, the present invention provides a support structure for a water conveyance tunnel of a pumped-storage power station and an installation method thereof, which can effectively disperse and bear pressures from different directions, and is convenient for disassembly and assembly, improving the reusable rate.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A support structure for a water conveyance tunnel of a pumped-storage power station includes an upper arc-shaped support plate, a lower arc-shaped support plate, a fixing ring, fixing rods, adjusting support rods, a connecting mechanism and anchor bolts;

[0007] The upper arc-shaped support plate and the lower arc-shaped support plate enclose to form a circular ring structure and are fixed through a connecting mechanism. The fixing ring is located at the center of the circular ring structure. The upper arc-shaped support plate is fixedly connected to the circular ring through fixing rods. The lower arc-shaped support plate is fixedly connected to the circular ring through symmetrically arranged adjusting support rods; the circular ring structure is fixed to the water conveyance tunnel through a plurality of anchor bolts.

[0008] Further, the adjusting support rod includes a sleeve, an adjusting rod and a screw rod;

[0009] One end of the sleeve is fixedly connected to the side wall of the fixing ring, and the other end of the sleeve is inserted with the adjusting rod; the screw rod is rotatably arranged on the sleeve, and one end of the screw rod extends out of the sleeve and the other end is in threaded cooperation with one end of the adjusting rod; the other end of the adjusting rod is inserted into the inner wall of the lower arc-shaped support plate.

[0010] Further, the adjusting support rod further includes a turntable, and the end of the screw rod extending out of the sleeve is fixedly connected to the turntable.

[0011] Further, two connecting rods are symmetrically and fixedly arranged at one end of the sleeve, and the ends of the two connecting rods away from the sleeve are fixedly connected to the side wall of the fixing ring. The protruding end of the screw rod and the turntable are both located between the two connecting rods.

[0012] Further, the connecting mechanism includes a connecting piece, a bolt and a nut;

[0013] The connecting piece is located at the connection of the two sides of the upper arc-shaped support plate and the two sides of the lower arc-shaped support plate, and both ends of the connecting piece are fixedly connected to the two sides of the upper arc-shaped support plate and the two sides of the lower arc-shaped support plate respectively through the cooperation of bolts and nuts.

[0014] Further, a backing plate and a clamping anchor are arranged at one end of the anchor rod inside the upper arc-shaped support plate and the lower arc-shaped support plate.

[0015] Further, both the upper arc-shaped support plate and the lower arc-shaped support plate are made of Q235 plate bodies.

[0016] The present invention also provides an installation method for a support structure of a water conveyance tunnel of a pumped storage power station. Using the above support structure, the installation method steps are as follows:

[0017] Step 1: Fix the fixed rod to the top of the fixing ring, and symmetrically arrange two adjusting support rods below the fixing ring;

[0018] Step 2: Use the connecting mechanism to splice the upper arc-shaped support plate and the lower arc-shaped support plate to form a circular ring structure;

[0019] Step 3: Place the fixing ring at the center of the circular ring structure, connect the top to the inner wall of the upper arc-shaped support plate through the fixed rod, and adjust the length of the adjusting support rod so that the adjusting support rod is inserted into the slot on the inner wall of the lower arc-shaped support plate to achieve connection;

[0020] Step 4: Pass a number of anchor rods through the insertion holes on the side walls of the upper and lower arc-shaped support plates, and install a backing plate and a clamping anchor at one end of the anchor rod inside the upper and lower arc-shaped support plates, thereby realizing the fixation with the water conveyance tunnel.

[0021] Beneficial effects:

[0022] 1. The circular ring structure formed by enclosing the upper arc-shaped support plate and the lower arc-shaped support plate in the present invention serves as the main body of the support structure, which can more effectively disperse and bear the pressure from different directions. Moreover, the fixed rod at the top connects the fixing ring and the upper arc-shaped support plate, enhancing the bearing capacity of the top for the weight of the overlying rock mass. The symmetrically distributed adjusting support rods at the bottom can support the bottom and resist the scouring force of the water flow. At the same time, the anchor rods on both sides pass through the insertion holes and penetrate deep into the rock mass, working together with the upper arc-shaped support plate and the lower arc-shaped support plate to effectively resist the lateral extrusion of the rock mass on both sides, greatly improving the stability of the support structure in a complex stress environment.

[0023] 2. The adjustable support rod of the present invention can be telescopically adjusted for use, enabling the lower end of the adjustable support rod to be separated from the lower arc-shaped support plate, ensuring the convenient disassembly and assembly of the upper arc-shaped support plate and the lower arc-shaped support plate, greatly improving the reusable rate of the support structure, and reducing the engineering cost.

[0024] 3. The connecting mechanism of the present invention can easily separate the upper arc-shaped support plate and the lower arc-shaped support plate. Compared with the traditional welding and on-site casting connections, this connection method is simple and easy to operate, reduces the damage to components during the demolition process, and greatly improves the reusable rate of the support structure.

[0025] 4. Both the upper arc-shaped support plate and the lower arc-shaped support plate of the present invention are made of Q235 plate bodies. The strength of Q235 meets the design requirements and the cost is lower. Moreover, this material has excellent cold working performance and can be flexibly processed such as cutting, stamping, and bending, and can better fit the contour of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0027] Figure 2 is a planar structural schematic diagram of the present invention.

[0028] Figure 3 is Figure 2 a cross-sectional view of

[0029] Figure 4 is Figure 2 an enlarged schematic view of part A.

[0030] Wherein, 1 - upper arc-shaped support plate; 2 - lower arc-shaped support plate; 3 - fixing ring; 4 - fixing rod; 5 - adjustable support rod; 51 - sleeve; 52 - adjusting rod; 53 - screw rod; 54 - turntable; 55 - slot; 56 - connecting rod; 6 - anchor bolt; 7 - jack; 8 - connecting piece; 9 - bolt; 10 - nut; 11 - backing plate; 12 - clamping anchor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following combines the drawings and gives embodiments to describe the present invention in detail.

[0032] The present invention provides a support structure for the diversion tunnel of a pumped-storage power station, as Figure 1 , Figure 2 shown, including an upper arc-shaped support plate 1, a lower arc-shaped support plate 2, a fixing ring 3, a fixing rod 4, an adjustable support rod 5, a connecting mechanism, and an anchor bolt 6.

[0033] The upper arc support plate 1 and the lower arc support plate 2 are both made of Q235 steel. Q235 steel has excellent mechanical properties and strong bearing capacity, and can meet the needs of various building structures. The upper arc support plate 1 and the lower arc support plate 2 can be provided with an anti-corrosion coating, such as a galvanized coating.

[0034] The upper arc support plate 1 and the lower arc support plate 2 are enclosed to form a circular ring structure and fixed by a connecting mechanism. The fixing ring 3 is located at the center of the circular ring structure. The upper arc support plate 1 is fixedly connected to the circular ring by a fixing rod 4. The lower arc support plate 2 is fixedly connected to the circular ring by two symmetrically arranged adjustment support rods 5. The circular ring structure is fixed to the water diversion tunnel by a number of anchor rods 6. The fixing rod 4 and the two adjustment support rods 5 form a triangular stable support structure.

[0035] Specifically, the anchor rods 6 are arranged on the side walls of the upper arc-shaped support plate 1 and the side walls of the lower arc-shaped support plate 2, and the side walls of the upper arc-shaped support plate 1 and the side walls of the lower arc-shaped support plate 2 are both provided with a plurality of insertion holes 7, and the plurality of anchor rods 6 respectively pass through the interiors of the plurality of insertion holes 7. The number of anchor rods 6 is determined according to the specific conditions of the construction site.

[0036] As an improvement, a pad 11 and a clamping anchor 12 are provided at one end of the anchor rod 6 located inside the upper arc support plate 1 and the lower arc support plate 2. After the anchor rod 6 enters the rock mass, the pad 11 increases the contact area with the support plate to make the force more uniform, and the clamping anchor 12 prevents the anchor rod 6 from loosening. The anchor rod 6 uses the anchoring force of the rock mass to tightly connect the supporting structure with the rock mass.

[0037] like Figure 3 As shown, the adjusting support rod 5 includes a sleeve 51, an adjusting rod 52, a screw 53 and a turntable 54; one end of the sleeve 51 is fixedly connected to the side wall of the fixing ring 3, and the other end of the sleeve 51 is plugged into the adjusting rod 52; the screw 53 is rotatably arranged on the sleeve 51, and one end of the screw 53 extends out from the sleeve 51 and is fixedly connected to the turntable 54, and the other end is threadedly matched with one end of the adjusting rod 52; the other end of the adjusting rod 52 is plugged into the inner wall of the lower arc-shaped support plate 2.

[0038] More specifically, two connecting rods 56 are symmetrically fixed at one end of the sleeve 51, and the ends of the two connecting rods 56 away from the sleeve 51 are fixedly connected to the side wall of the fixing ring 3, and the protruding end of the screw rod 53 and the rotating disk 54 are both located between the two connecting rods 56. The rotating disk 54 drives the screw rod 53 to rotate, and since the screw rod 53 is threadedly connected to the adjusting rod 52, the adjusting rod 52 will expand and contract in the sleeve 51.

[0039] The connecting mechanism is arranged at the connection between the two sides of the upper arc-shaped support plate 1 and the two sides of the lower arc-shaped support plate 2, such as Figure 4As shown in the figure, the connecting mechanism includes a connecting piece 8, a bolt 9 and a nut 10; the connecting piece 8 is located at the connection of both sides of the upper arc-shaped support plate 1 and both sides of the lower arc-shaped support plate 2, and both ends of the connecting piece 8 are respectively fixedly connected to both sides of the upper arc-shaped support plate 1 and both sides of the lower arc-shaped support plate 2 through the cooperation of the bolt 9 and the nut 10.

[0040] The present invention also provides an installation method for a support structure of a water conveyance tunnel of a pumped-storage power station. Using the above support structure, the installation method steps are as follows:

[0041] Step 1: Fix the fixed rod 4 to the top of the fixed ring 3, and symmetrically arrange two adjusting support rods 5 below the fixed ring 3; the two adjusting support rods 5 are symmetric about the axis direction of the fixed rod 4.

[0042] Step 2: Splice the upper arc-shaped support plate 1 and the lower arc-shaped support plate 2 using the connecting mechanism. Place the connecting piece 8 at the connection of both sides of the two, and fasten it with the bolt 9 and the nut 10 to form a circular structure, completing the preliminary assembly of the support structure.

[0043] Step 3: Place the fixed ring 3 at the center of the circular structure. Its top is connected to the inner wall of the upper arc-shaped support plate 1 through the fixed rod 4. Rotate the bottom turntable 54 to drive the screw rod 53 to rotate, so that the adjusting rod 52 extends and retracts in the sleeve 51 to adjust the length. One end of the adjusting rod 52 is inserted into the slot 55 inside the inner wall of the lower arc-shaped support plate 2 to further stabilize the overall structure.

[0044] Step 4: Then, pass several anchor bolts 6 through the insertion holes 7 on the side walls of the upper and lower arc-shaped support plates, and install a backing plate 11 and a clamping anchor 12 at the inner end to complete the installation of the entire support structure, connecting it to the tunnel wall and the surrounding rock mass.

[0045] In summary, the above is only a preferred embodiment of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A support structure for a water conveyance tunnel of a pumped-storage power station, characterized in that, It includes an upper arc-shaped support plate, a lower arc-shaped support plate, a fixing ring, a fixing rod, an adjusting support rod, a connecting mechanism and an anchor rod; The upper arc-shaped support plate and the lower arc-shaped support plate enclose to form an annular structure and are fixed by a connecting mechanism. The fixing ring is located at the center of the annular structure. The upper arc-shaped support plate is fixedly connected to the ring through a fixing rod, and the lower arc-shaped support plate is fixedly connected to the ring through symmetrically arranged adjusting support rods. The annular structure is fixed to the diversion tunnel through a number of anchor rods.

2. The water diversion tunnel support structure of the pumped storage power station according to claim 1, wherein The adjusting support rod includes a sleeve, an adjusting rod and a screw rod; One end of the sleeve is fixedly connected to the side wall of the fixing ring, and the other end of the sleeve is inserted with the adjusting rod. The screw rod is rotatably arranged on the sleeve, and one end of the screw rod extends out of the sleeve, and the other end is in threaded cooperation with one end of the adjusting rod. The other end of the adjusting rod is inserted into the inner wall of the lower arc-shaped support plate.

3. The penstock support structure of the pumped-storage power station according to claim 2, wherein The adjusting support rod further includes a turntable, and the end of the screw rod extending out of the sleeve is fixedly connected to the turntable.

4. The penstock support structure of the pumped-storage power station according to claim 3, characterized in that, Two connecting rods are symmetrically and fixedly arranged at one end of the sleeve, and the ends of the two connecting rods away from the sleeve are fixedly connected to the side wall of the fixing ring. The extending end of the screw rod and the turntable are both located between the two connecting rods.

5. The penstock support structure of the pumped storage power station according to claim 1, characterized in that, The connecting mechanism includes a connecting piece, a bolt and a nut; The connecting piece is located at the connection of the two sides of the upper arc-shaped support plate and the two sides of the lower arc-shaped support plate, and both ends of the connecting piece are respectively fixedly connected to the two sides of the upper arc-shaped support plate and the two sides of the lower arc-shaped support plate through the cooperation of bolts and nuts.

6. The penstock support structure of the pumped-storage power station according to claim 1, characterized in that, One end of the anchor rod located inside the upper arc-shaped support plate and the lower arc-shaped support plate is provided with a backing plate and a clamping anchor.

7. The penstock support structure of the pumped-storage power station according to any one of claims 1-6, characterized in that, Both the upper arc-shaped support plate and the lower arc-shaped support plate are made of Q235 plate bodies.

8. A method for installing a support structure of a water conveyance tunnel in a pumped-storage power station, characterized in that, Adopting the support structure as described in claim 6, the installation method steps are as follows: Step 1, fixedly connect the fixing rod to the top of the fixing ring, and symmetrically arrange two adjusting support rods below the fixing ring; Step 2, splice the upper arc-shaped support plate and the lower arc-shaped support plate by using the connecting mechanism to form an annular structure; Step 3, place the fixing ring at the center of the annular structure, connect the top to the inner wall of the upper arc-shaped support plate through the fixing rod, and adjust the length of the adjusting support rod so that the adjusting support rod is inserted into the slot on the inner wall of the lower arc-shaped support plate to achieve connection; Step 4, pass a number of anchor rods through the jacks on the side walls of the upper and lower arc-shaped support plates, and install a backing plate and a clamping anchor at one end of the anchor rod located inside the upper and lower arc-shaped support plates, thereby realizing the fixation with the diversion tunnel.

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