Flow guide structure meeting construction water requirement

Abstract

The utility model discloses a diversion structure giving consideration to construction water requirements, which comprises a diversion tunnel, a cofferdam, a water retaining weir and a water delivery system, the cofferdam is arranged in front of the cofferdam for retaining water, an inlet of the diversion tunnel is arranged in front of the cofferdam, and the elevation of the cofferdam consists of a storage water level and a tunnel drainage upstream heap height. The water conveying system comprises a water pump, a water supply pipeline and a high-position water tank, the water pump is arranged on the periphery of the top of the cofferdam, and water is conveyed to the high-position water tank through the water supply pipeline. The retaining water level is controlled through the retaining weir stoplog gate baffle, the construction water use requirement and the flood season water passing requirement are met, the retaining weir stoplog gate can be used for diversion tunnel lower gate blocking in the later period, the construction cost can be effectively reduced, and the technical structure is simple, convenient to construct, low in cost, wide in application range and suitable for popularization and application. The problem of construction water consumption in the dry season of an existing reservoir project can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of water conservancy and hydropower engineering construction, in particular to a diversion structure taking into account the requirements of construction water. Background Art

[0002] A pumped-storage power station is a special type of power station, consisting of an upper reservoir, a lower reservoir, a water transmission system, a plant, etc. It uses electricity during low power load periods to pump water to the upper reservoir, and then releases water to the lower reservoir to generate electricity during peak power load periods. It can convert excess electricity when the grid load is low into high-value electricity during peak grid periods. It has functions such as peak regulation, frequency regulation, phase regulation, energy storage, system standby and black start. In order to achieve the "dual carbon" goal, based on my country's resource conditions, the demand for pumped storage in the future will be very urgent.

[0003] The catchment area of ​​the upper reservoir of a pumped-storage power station is relatively small. Considering ecological discharge and downstream construction water requirements, natural runoff in some months of the dry season cannot meet the construction water requirements, and it is necessary to pump water from the downstream river or reservoir step by step, which is relatively costly. Alternatively, water can be stored in surrounding ponds or reservoirs during the flood season to meet the water needs of the dry season, which is less costly, but the water storage in the reservoir needs to take into account the diversion and discharge requirements.

[0004] Based on the above situation, the utility model proposes a diversion structure and a diversion method that take into account the requirements of construction water, so as to solve the problem of diversion and water discharge caused by water storage in the upper reservoir. Utility Model Content

[0005] In order to solve the problems existing in the background technology, the utility model provides a diversion structure and a diversion method which take into account the requirements of construction water.

[0006] The utility model adopts the following technical solutions:

[0007] A diversion method that takes into account the requirements for construction water, including a diversion tunnel, a cofferdam, a water retaining weir, and a water delivery system. The cofferdam is arranged in front of a dam to retain water, the inlet of the diversion tunnel is arranged in front of the cofferdam, the elevation of the cofferdam is raised by the water level of the storage water and the upstream of the tunnel discharge, the water delivery system includes a water pump, a water supply pipeline and a high-level water tank, the water pump is arranged around the top of the cofferdam, and the water is transported to the high-level water tank through the water supply pipeline.

[0008] Furthermore, the diversion tunnel includes a tunnel diversion channel, an inlet structure and a tunnel body. The tunnel diversion channel is arranged in front of the inlet structure, the channel slope and the bottom plate are lined with concrete, and the tunnel diversion channel is connected to the original channel.

[0009] Furthermore, the tunnel inlet structure includes a plate trough and a water inlet structure, and the tunnel body is connected to the tunnel diversion channel through the inlet structure.

[0010] Furthermore, the water retaining weir includes a weir body, retaining columns, a stacked beam gate baffle and a retaining groove. The weir body is arranged on the diversion channel and is located in front of the inlet structure. The weir body and the lining concrete of the diversion channel are cast integrally. The retaining columns are cast integrally with the weir body. The retaining columns are arranged on both sides of the middle part of the diversion channel. The retaining columns are combined in pairs to form the retaining groove. The stacked beam gate baffle is embedded in the retaining groove. Multiple stacked beam gate baffles are stacked to form combined baffles of different heights to retain water.

[0011] Furthermore, the retaining groove is consistent with the plate groove size of the tunnel entrance structure, and the stacked beam gate baffle is tightly embedded in the plate groove. When the dam construction is completed in the later stage, the stacked beam gate baffle is gradually embedded in the plate groove to serve as a gate to block water and start storing water.

[0012] Furthermore, a diversion method of a diversion structure taking into account the requirements of construction water comprises the following steps:

[0013] Step 1: Set up a cofferdam in front of the dam to block water, so that the construction site is dry land;

[0014] Step 2: divert the upstream water to the downstream river channel through the diversion tunnel inlet;

[0015] Step 3: Determine the cofferdam elevation by the water level and the upstream elevation of the tunnel discharge;

[0016] Step 4: Use the water pumps around the top of the cofferdam and then use the water supply pipeline to deliver the water to the high-level water pool for construction on the nearby working surface;

[0017] Step 4: When the dam construction is completed, the stoplog gate baffles are gradually embedded in the plate grooves to serve as a gate to block water and start to store water. The water level and water storage volume are controlled by the combined number of the stoplog gate baffles;

[0018] Step 5: At the end of the flood season, the stoplog gate baffles are gradually embedded in the baffle grooves to start storing water. When the water level exceeds the top elevation of the weir body, the upstream water overflows through the weir body and is discharged to the downstream through the inlet structure and the tunnel body.

[0019] Furthermore, the diversion tunnel in step 2 includes a tunnel diversion channel, an inlet structure and a tunnel body; the inlet structure includes a plate trough and a water inlet structure,

[0020] The channel side slope and bottom plate lining concrete of the tunnel diversion channel in the diversion tunnel are connected with the original channel, and the tunnel body is connected with the tunnel diversion channel through the inlet structure.

[0021] The utility model provides a diversion structure and method which take into account the requirements for construction water use: the water level is controlled by the baffle plates of the water retaining weir stacked beam gate to meet the construction water requirements and the need for water passing during the flood season, and the water retaining weir stacked beam gate can be used for closing the diversion tunnel later, which can effectively reduce the construction cost. The technology has a simple structure, convenient construction, low cost, and a wide range of applications, and can effectively solve the problem of construction water use in the dry season of existing reservoir projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the plan layout of the diversion and water storage system of the utility model;

[0023] Figure 2 for Figure 1 Middle partial enlarged picture;

[0024] Figure 3 This is a cross-sectional view of the weir body of the utility model water retaining weir;

[0025] Figure 4 This is a cross-sectional view of the utility model during the dry season water storage operation condition;

[0026] Figure 5 This is a cross-sectional view of the utility model's water storage operation condition during flood season;

[0027] Figure 6 This is a cross-sectional view of the utility model in the working condition of the lowering gate and blocking.

[0028] The serial numbers marked in the figure are respectively as follows: 1-diversion tunnel, 101-tunnel diversion channel, 102-inlet structure, 1021-plate trough, 1022, water inlet structure, 103-tunnel body, 2-cofferdam, 3-water retaining weir, 301-weir body, 302-retaining column, 303-stacked beam gate baffle, 304-retaining trough, 4-water delivery system, 401-water pump, 402-water supply pipeline, 403-high-level water tank. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Refer to the attached Figure 1-4 , a diversion structure that takes into account the requirements of construction water, including a diversion tunnel 1, a cofferdam 2, a water retaining weir 3, and a water delivery system 4. The cofferdam 2 is set in front of the dam to retain water and ensure that the dam foundation pit has dry land construction conditions. The inlet of the diversion tunnel 1 is set in front of the cofferdam 2 to divert upstream water to the downstream river. The elevation of the cofferdam 2 is determined by the water storage level and the upstream elevation of the tunnel discharge, and takes into account the safety superelevation. The water delivery system 4 includes a water pump 401, a water supply pipeline 402 and a high-level water tank 403. The water pump 401 is set around the top of the cofferdam 2, and the water is transported to the high-level water tank 403 through the water supply pipeline 402 for construction on nearby working surfaces.

[0031] The diversion tunnel 1 includes a tunnel diversion channel 101, an inlet structure 102 and a tunnel body 103. The tunnel diversion channel 101 is arranged in front of the inlet structure 102. The channel slope and bottom plate of the tunnel diversion channel 101 are lined with concrete and connected to the original channel.

[0032] The tunnel inlet structure 102 includes a plate groove 1021 and a water inlet structure 1022 , and the tunnel body 103 is connected to the tunnel diversion channel 101 through the inlet structure 102 .

[0033] The water retaining weir 3 includes a weir body 301, retaining columns 302, a stacked beam gate baffle plate 303 and a retaining groove 304. The weir body 301 is arranged on the diversion channel and is located in front of the inlet structure 102. The weir body 301 is integrally cast with the lining concrete of the diversion channel and is tightly connected. The retaining columns 302 are integrally cast with the weir body 301. The retaining columns 302 are arranged on both sides of the middle part of the diversion channel. The retaining columns 302 are combined in pairs to form the retaining groove 304. The stacked beam gate baffle plate 303 is embedded in the retaining groove 304. Multiple stacked beam gate baffle plates 303 are stacked to form combined baffles of different heights to retain water.

[0034] See attached Figure 5-6 The retaining groove 304 is consistent in size with the plate groove 1021 of the tunnel inlet structure 102, and the stacked beam gate baffle 303 is tightly embedded in the plate groove 1021. When the dam construction is completed in the later stage, the stacked beam gate baffle 303 is gradually embedded in the plate groove 1021 to serve as a gate to block water and start storing water.

[0035] At the end of the flood season, the stopgate baffles 303 are successively embedded in the retaining grooves 304 to start storing water. When the water level exceeds the top elevation of the weir body 301, the upstream water overflows through the weir body 301 and is discharged to the downstream through the inlet structure 102 and the tunnel body 103. The water retaining level and water storage volume are controlled by the number of combinations of the stopgate baffles 303. In the dry season, the stopgate baffles 303 are combined and superimposed to the required water storage level. In the flood season, the natural water volume is sufficient, and the number of the stopgate baffles 303 can be reduced to control the water level and ensure the smooth flow of flood water in the flood season.

[0036] The utility model also includes a diversion method of the diversion structure taking into account the requirements of construction water.

[0037] Step 1: Set the cofferdam 2 in front of the dam to block water, so that the construction site is dry land;

[0038] Step 2: divert the upstream water to the downstream river channel through the inlet of the diversion tunnel 1;

[0039] Step 3: Determine the elevation of cofferdam 2 by the water level and the upstream elevation of the tunnel discharge;

[0040] Step 4: Use the water pump around the top of the cofferdam 2 and then send the water to the high-level water pool through the water supply pipe 402 for construction on the nearby working surface;

[0041] Step 4: When the dam construction is completed, the stoplog gate baffles 303 are gradually embedded in the plate grooves 1021 to serve as a gate to block water and start to store water. The water level and water storage volume are controlled by the number of combinations of the stoplog gate baffles 303.

[0042] Step 5: At the end of the flood season, the stoplog gate baffles 303 are gradually embedded in the baffle grooves 304 to start storing water. When the water level exceeds the top elevation of the weir body 301 , the upstream water overflows through the weir body 301 and is discharged to the downstream through the inlet structure 102 and the tunnel body 103 .

[0043] The diversion tunnel 1 in step 2 includes a tunnel diversion channel 101, an inlet structure 102 and a tunnel body 103; the inlet structure 102 includes a plate groove 1021 and a water inlet structure 1022.

[0044] The channel slope and bottom plate lining concrete of the tunnel diversion channel in the diversion tunnel are connected with the original channel, and the tunnel body 103 is connected with the tunnel diversion channel 101 through the inlet structure 102.

[0045] Unless otherwise specified, in the present invention, if there are terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in combination with the drawings and according to specific circumstances. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] Unless otherwise specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A diversion structure that takes into account the requirements for construction water, characterized in that: It includes a diversion tunnel, a cofferdam, a water retaining weir, and a water delivery system. The cofferdam is set in front of the dam to retain water. The inlet of the diversion tunnel is set in front of the cofferdam. The elevation of the cofferdam is raised by the water level of the storage water and the upstream of the tunnel discharge. The water delivery system includes a water pump, a water supply pipeline and a high-level water tank. The water pump is set around the top of the cofferdam and transports water to the high-level water tank through the water supply pipeline.

2. A diversion structure taking into account the construction water requirements according to claim 1, characterized in that: The diversion tunnel comprises a tunnel diversion channel, an inlet structure and a tunnel body. The tunnel diversion channel is arranged in front of the inlet structure. The channel slope and bottom plate of the tunnel diversion channel are lined with concrete and connected to the original channel.

3. A diversion structure taking into account the requirements of construction water according to claim 1, characterized in that: The inlet structure of the diversion tunnel includes a plate trough and a water inlet structure, and the tunnel body is connected to the tunnel diversion channel through the inlet structure.

4. A diversion structure taking into account the requirements of construction water according to claim 1, characterized in that: The water retaining weir includes a weir body, retaining columns, a stacked beam gate baffle and a retaining groove. The weir body is arranged on the diversion channel and is located in front of the inlet structure. The weir body and the lining concrete of the diversion channel are cast integrally. The retaining columns are cast integrally with the weir body. The retaining columns are arranged on both sides of the middle part of the diversion channel. The retaining columns are combined in pairs to form the retaining groove. The stacked beam gate baffle is embedded in the retaining groove. Multiple stacked beam gate baffles are stacked to form combined baffles of different heights to retain water.

5. A diversion structure taking into account the requirements of construction water according to claim 4, characterized in that: The retaining groove is consistent with the plate groove of the tunnel entrance structure in size, and the stop gate retaining plate is tightly embedded in the plate groove.

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