A spur-like dam structure and layout method suitable for oil recovery in bifurcated river sections

Abstract

The present invention discloses a spur-like dam structure and a layout method suitable for oil recovery in bifurcated river sections, and relates to the technical field of spur-like dam structures. The spur-like dam structure includes a dam body and a dam head, one end of the dam body is connected to the river bank A and the other end is connected to the dam head, the water-facing surface of the dam body is a slope, the top of the water-facing surface of the dam body is provided with multiple oil inlet channels, and the dam body is provided with a transfer mechanism; the oil in the water flow can slide along the water-facing surface of the dam body into one or more oil inlet channels, and the transfer mechanism can merge the oil in each oil inlet channel and connect it to the recovery equipment; an oil interception mechanism is also provided between the dam body and the river bank B; the present invention intercepts the oil on the surface of the river through the oil interception mechanism, so that the oil on the surface of the river impacts the oil interceptor and is obliquely guided by the oil interception mechanism to the oblique front side of the spur-like dam structure, and the water-facing surface of the inclined dam body is used to separate the oil from the river water.

Description

Technical Field

[0001] The present invention relates to the technical field of spur dike-like structures, and in particular to a spur dike-like structure suitable for oil pollution recovery in bifurcated river sections and a layout method thereof. Background Art

[0002] A bifurcated river section refers to a branching channel in a plain river, specifically a section of the riverbed caused by a mid-shoal or sandbar. Because of its resemblance to a braid, it is also called a braided stream. Sediment accumulation in bifurcated river sections can easily obstruct navigation. However, installing spur dikes in the shallow sections of bifurcated sections of sandy alluvial rivers narrows the riverbed, reducing the flow area and increasing flow velocity, deepening the existing riverbed and achieving the effect of "binding water and attacking sediment."

[0003] Take the patent document with application number CN201621283390.9 as an example: it mainly records: "The utility model relates to a dike structure for regulating shallow waterways in a branched section of a sandy riverbed of an alluvial river. The dike structure is provided with a protective structure; the protective structure includes a dam root protective structure laid at the bottom around the dam root, a dam body protective structure laid at the bottom around the dam body, a dam head protective structure laid at the bottom around the dam head, and a dam head under-protection structure laid below the bottom of the dam head and extending vertically from the bottom of the dam head to the riverbed; the protective structure is laid out by a plurality of frame hinge rows, and the frame hinge rows are connected by a plurality of permeable frames, the permeable frames are hexagonal tetrahedral permeable frames, and the contact angles of adjacent permeable frames are connected to each other by steel bars bent into circles to form a frame hinge row; at least one side of the permeable frame is encrypted with a triangular frame. The dike structure of the utility model has a stable structure, a long service life, a good waterway regulation effect, and is conducive to the attachment and survival of various aquatic organisms."

[0004] It can be seen that in the prior art, spur dikes generally only perform their relatively basic function of "restraining water and attacking sand", resulting in low utilization of the dam body.

[0005] However, in the process of oil pollution control in rivers, dikes cannot assist in oil pollution control. For example, the patent document with application number CN201610723430.5: "The present invention discloses an experimental device for intercepting and removing oil pollution in river channels, including an interception system and an oil collection system, and the oil collection system is located on one side of the interception system; the interception system includes a number of interception units connected in series along the left and right directions, each interception unit includes a floating row and an oil blocking plate, the floating row includes a horizontally arranged flat plate, the oil blocking plate is arranged on the front side of the flat plate along the length direction of the flat plate, the oil blocking plate is connected to the flat plate through a height adjustment mechanism, the adjacent two flat plates are connected by an angle adjustment mechanism, and the adjacent two oil blocking plates are connected by a buffer connector; the present invention has a simple structure, convenient and efficient operation, strong safety and reliability, a high degree of automation, low labor intensity, and a wide range of applications. The interception, recovery, and separation of oil pollution are completed in an integrated manner with high efficiency."

[0006] It can be seen that during the process of river oil pollution control, the river oil pollution control equipment mainly performs the functions of oil pollution interception and recovery.

[0007] Therefore, it is necessary to design a spur dike-like structure that has both the oil pollution interception function and the "water confinement and sand attack" function in the existing technology. Summary of the Invention

[0008] The purpose of the present invention is to provide a spur dike-like structure and a layout method suitable for oil recovery in bifurcated river sections, so as to solve the above-mentioned technical problems.

[0009] The present invention provides the following technical solutions:

[0010] A spur dam structure suitable for oil recovery in bifurcated river sections includes a dam body and a dam head. One end of the dam body is connected to the river bank A and the other end is connected to the dam head. The water-facing surface of the dam body is a slope. The top of the water-facing surface of the dam body is provided with multiple oil inlet channels. A transfer mechanism is provided in the dam body.

[0011] When the water flow in the river section hits the water-facing surface, the oil in the water flow can slide along the water-facing surface of the dam body to one or more oil inlet channels. The transfer mechanism can merge the oil in each oil inlet channel and connect it to the recovery equipment;

[0012] An oil interception mechanism is also provided between the dam body and river bank B to guide the oil on the water flow between the two to the water-facing surface of the dam body.

[0013] Furthermore, the dam body is formed by at least a welded layer and a concrete layer stacked together.

[0014] Furthermore, a storage cavity is formed in the welding layer, one side of the storage cavity is connected to the oil inlet channel, and the other side is connected to the drainage channel;

[0015] The transfer mechanism includes an oil tank 2 that can be slidably arranged in the storage cavity. The bottom surface of the oil tank 2 is connected to the bottom of the storage cavity through an elastic reset member, and a vacuum area is sealed between the bottom surface of the oil tank 2 and the bottom surface of the storage cavity; the oil tank 2 is provided with a connecting hole, which can be connected to the drainage channel during the sliding process of the oil tank 2.

[0016] Furthermore, a plurality of mutually parallel speed brakes are provided in the fuel tank 2, and each speed brake is provided with a plurality of mutually staggered openings.

[0017] Furthermore, the oil pollution interception mechanism is a rigid inclined plate provided between the dam body and the river bank B or a flexible inclined membrane positioned by a plurality of positioning columns;

[0018] The bottom end of the rigid inclined plate or the flexible inclined membrane is provided with a buoyancy counterweight block so that part of the rigid inclined plate or the flexible inclined membrane is immersed in the river.

[0019] Furthermore, a speed reduction mechanism is provided on the upstream side of the rigid inclined plate or the flexible inclined membrane.

[0020] Furthermore, the deceleration mechanism includes a bracket arranged between the dam body and the river bank B, and a plurality of slide grooves are provided on the bracket along the flow direction of the river water. The slide grooves are each provided with a vertically sliding baffle, and the baffles are each provided with a through groove, and the through grooves of adjacent baffles are staggered with each other.

[0021] Furthermore, buoyancy supply blocks having the same number as the baffles are sequentially provided on the upstream side of the bracket along the flow direction of the river, and the buoyancy supply blocks are connected to the baffles in a one-to-one correspondence.

[0022] A method for laying out the above-mentioned spur dike-like structure comprises the following steps:

[0023] Step 1: Build the dam;

[0024] Step 2: Divide the river into multiple intervals according to the flood season, normal water season and dry season, calculate the average water level data of each interval to obtain the maximum and minimum values of the average water level data;

[0025] Step 3: Add 20-60 cm to the highest and lowest values of the average water level data to obtain value 1 and value 2. Arrange two rows of oil inlet channels on the dam body with value 1 and value 2 as the height respectively;

[0026] Step 4: Take the dam body and river bank B as the two starting points and build an oil interception mechanism between them.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention intercepts oil on the surface of the river through the oil intercepting mechanism, so that the oil on the surface of the river impacts the oil intercepting mechanism and is obliquely guided by the oil intercepting mechanism to the oblique front side of the spur dike structure; since the density of oil in the river is smaller than that of water, the oil is generally separated from the river water and then floats on the surface of the river water, and the water-facing surface of the dam body impacted by the river will slide upward along the inclined water-facing surface of the dam body. At this time, the oil with a smaller density can slide upward for a longer distance on the water-facing surface. An oil inlet channel is provided at the top of the water-facing surface of the spur dike structure, so that the oil that slides further upward can enter the oil inlet channel, thereby utilizing the inclined water-facing surface of the dam body to separate the oil from the river water.

[0029] In addition, other effects of the present invention will be specifically described through the following examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0032] Figure 2 This is a structural diagram of the oil pollution interception mechanism of Example 1;

[0033] Figure 3 A longitudinal section of the dam body of Example 1;

[0034] Figure 4 Schematic diagram of the structure of the dam body of Example 2;

[0035] Figure 5 Schematic diagram of the structure of the welding layer of Example 2;

[0036] Figure 6 A longitudinal section of the welding layer of Example 2;

[0037] Figure 7 This is a schematic diagram of the overall structure of Example 3;

[0038] Figure 8 This is a structural diagram of the oil pollution interception mechanism of Example 3.

[0039] Reference numerals:

[0040] 1. Dam body; 2. Dam head; 3. River bank A; 4. River bank B; 5. Water-facing surface; 6. Oil inlet channel; 7. Positioning column; 8. Flexible inclined membrane; 9. Sleeve; 10. Buoyancy counterweight; 11. Welding layer; 12. Concrete layer; 13. Suction channel 1; 14. Elastic reset member; 15. Drainage channel; 16. Extraction port; 17. Speed brake; 18. Opening; 19. Fuel tank 1; 20. Suction channel 2; 21. Connecting hole; 22. Storage cavity; 23. Bracket; 24. Slide; 25. Baffle; 26. Through groove; 27. Buoyancy supply block; 28. U-shaped connecting rod; 29. Oil interception mechanism; 30. Speed reduction mechanism; 31. Fuel tank 2. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0043] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0046] The present invention aims to solve the problem that the functions of the river oil pollution control device and the spur dam-like structure are too single. It can be seen that when the same branch river section needs the river oil pollution control function and the "water confinement and sand attack" function, the river oil pollution control device and the spur dam-like structure need to be superimposed.

[0047] However, the spur-like structure suitable for oil recovery in a branched river section in this embodiment mainly consists of two parts: a spur function part and an oil interception function part.

[0048] The spur dike function part in the present invention can not only play the role of "restraining water and attacking sand" in the river channel, but also play the role of shrinking the river channel. At this time, the oil pollution interception function part only needs to intercept part of the original river channel.

[0049] It can be seen that the core idea of the present invention is to intercept the oil on the surface of the river through the oil interception functional part, so that the oil on the surface of the river impacts the oil interception mechanism 29, and is obliquely guided by the oil interception mechanism 29 to the oblique front side of the spur dike structure, thereby using the spur dike structure as a carrier to recover the oil.

[0050] Generally, the cross-section of the dam body 1 is trapezoidal. Therefore, the water-facing surface 5 of the dam body 1 is generally an inclined surface. Since the density of oil in the river is smaller than that of water, the oil will generally be separated from the river water and then float on the surface of the river water. When the river hits the water-facing surface 5 of the dam body 1, it will slide upward along the inclined water-facing surface 5 of the dam body 1. At this time, the oil with lower density can slide upward a farther distance on the water-facing surface 5. An oil inlet channel 6 is provided at the top of the water-facing surface 5 of the spur dam structure, so that the oil that slides upward a farther can enter the oil inlet channel 6, thereby realizing the separation of the oil from the river water.

[0051] Moreover, the oil recovery equipment of the prior art can be set in the spur dike structure, thereby improving the space utilization rate of the spur dike structure; the oil recovery equipment can also be set on the river bank A3, and the space inside the spur dike structure can be used to fill the pipeline, thereby also improving the space utilization rate of the spur dike structure.

[0052] It can be seen that the advantage of the spur dike structure as a carrier for oil recovery is that: recovery through the spur dike structure fully utilizes the space inside the dam body 1 and the solid structure of the spur dike, and also utilizes the characteristic of the spur dike structure with a slope facing the water surface 5 to achieve a certain degree of automatic separation of oil and river water.

[0053] The following will be described with reference to specific embodiments.

[0054] Example 1

[0055] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to enrich the functions of the dam body 1 itself and utilize the space of the dam body 1 itself, the present invention provides a tine-like dam structure suitable for oil recovery in bifurcated river sections, the tine-like dam structure suitable for oil recovery in bifurcated river sections includes a dam body 1 and a dam head 2, one end of the dam body 1 is connected to the river bank A3 and the other end is connected to the dam head 2, the water-facing surface 5 of the dam body 1 is a slope, and a plurality of oil inlet channels 6 are provided on the top of the water-facing surface 5 of the dam body 1, and a transfer mechanism is provided in the dam body 1; when the water flow in the river section hits the water-facing surface 5, the oil in the water flow can slide along the water-facing surface 5 of the dam body 1 to one or more oil inlet channels 6, and the channels can merge the oil in each oil inlet channel 6 and communicate with the recovery equipment; an oil interception mechanism 29 is also provided between the dam body 1 and the river bank B4 to guide the oil on the water flow between the two to the water-facing surface 5 of the dam body 1.

[0056] The oil pollution interception mechanism 29 of this embodiment includes a plurality of positioning columns 7 arranged along an oblique line between the dam head 2 and the river bank B4 , and a flexible oblique membrane 8 is arranged between each two positioning columns 7 .

[0057] In order to minimize the impact of the flexible inclined membrane 8 on the river flow, generally only the bottom of the flexible inclined membrane 8 sinks. Therefore, the flexible inclined membrane 8 of this embodiment is installed on the positioning column 7 by the following method:

[0058] First, the length of the flexible inclined membrane 8 is set to be the oblique length of the positioning column 7, and then a sleeve 9 structure is formed by gluing or hot pressing at the position corresponding to the positioning column 7 on the flexible inclined membrane 8. The sleeve 9 structure is slid onto the positioning column 7 in sequence, and the top of the positioning column 7 is fixed to the top of the flexible inclined membrane 8. A buoyancy counterweight 10 is provided at the bottom end of the flexible inclined membrane 8. The buoyancy counterweight 10 is generally a multi-layer structure, the upper layer is a foam structure with greater buoyancy, and the lower layer is a metal structure with greater density. This can ensure that when the water level floats with the waves, the sinking amplitude of the bottom end of the flexible inclined membrane 8 is controlled to be as low as possible between 10cm and 30cm.

[0059] The dam body 1 in this embodiment is made of cast concrete. However, before casting, an oil tank 19 connected to the oil inlet channel 6 is pre-buried on its top. The oil inlet channel 6 and the oil tank 19 are both made of steel materials, and a suction channel 13 is connected to the oil tank 19. The suction channel 13 is connected to the oil recovery equipment, specifically the input pipe of the pump of the oil recovery equipment is connected to the suction channel 13.

[0060] This embodiment also provides a layout method, which is particularly suitable for laying out the above-mentioned spur dike-like structure. The method includes the following steps:

[0061] Step 1: Build dam body 1;

[0062] Step 2: Divide the river into multiple intervals according to the flood season, normal water season and dry season, calculate the average water level data of each interval to obtain the maximum and minimum values of the average water level data;

[0063] Step 3: Add 20-60 cm to the highest and lowest values of the average water level data to obtain value 1 and value 2. Arrange two rows of oil inlet channels 6 on the dam body 1 with value 1 and value 2 as the heights respectively;

[0064] Step 4: With the dam body 1 and the river bank B4 as the two starting points, an oil interception mechanism 29 is built obliquely between the two.

[0065] Example 2

[0066] The difference from the above embodiment 1 is that:

[0067] like Figure 4 、 Figure 5 and Figure 6 As shown, the dam body 1 in this embodiment is composed of at least two layers, which are a welding layer 11 and a concrete layer 12. The welding layer 11 is welded by a steel frame, and a storage cavity 22 is formed in the welding layer 11. One side of the storage cavity 22 is connected to the oil inlet channel 6, and the other side is connected to the drainage channel 15. An oil tank 2 31 that can slide vertically and reset is provided in the storage cavity 22 through an elastic reset member 14. A connecting hole 21 is provided on the side of the oil tank 2 31, and a vacuum area is sealed between the bottom of the oil tank 2 31 and the bottom of the storage cavity 22.

[0068] When the oil enters the channel 6 and gathers in the storage cavity 22, it will gradually enter the oil tank 2 31, and the oil tank 2 31 mainly relies on the elastic return member 14 for support. When the oil in the oil tank 2 31 gathers, the weight gradually increases, and the elastic return member 14 is gradually compressed under the gravity. Then, the connecting hole 21 of the oil tank 2 31 gradually connects with the drainage channel 15 as the oil tank 2 31 slides down, thereby discharging the liquid at the bottom of the oil tank 2 31. After the liquid at the bottom of the oil tank 2 31 is discharged, the oil tank 2 31 returns to its original position and slides upward under the action of the elastic return member 14.

[0069] The advantage of setting up the oil tank 2 31 in this way is that when the river surface is affected by wind, there is a high probability that waves will form on the river surface, and the waves will flush more water into the oil into the channel 6. At this time, the oil tank 2 31 can play a static role. By letting the oil and water stand in the oil tank 2 31 for a period of time, it can provide time for the oil and water to stand and separate. In order to operate the separated oil and water separately, a suction channel 2 20 is set at the top of the oil tank 2 31 and a connecting hole 21 is set at the bottom of the oil tank 2 31.

[0070] In order to further improve the static stratification effect of the oil tank 2 31 on the oil-water mixture, a plurality of deceleration plates 17 are provided in the oil tank 2 31, and a plurality of openings 18 are provided on the plurality of deceleration plates 17 which are staggered with each other. By preventing the vertical direct flow of the oil, the liquid is decelerated, thereby shortening the time required for static stratification.

[0071] In order to adapt to the up and down sliding characteristics of the fuel tank 2 31, the suction channel 2 20 is configured as a retractable pipe. The bottom end of the retractable pipe is fixedly connected to the top speed reducer 17 of the fuel tank 2 31, and the retractable pipe is extracted through the short extraction port 16. The top end of the retractable pipe is connected to the recovery equipment.

[0072] Example 3

[0073] The difference from Example 2 is that:

[0074] like Figure 7 and Figure 8 As shown, the oil interception mechanism 29 of this embodiment is a rigid inclined plate, and a buoyancy counterweight block 10 is provided at the bottom end of the rigid inclined plate ( Figure 7 Not shown in the figure), so that part of the rigid inclined plate is immersed in the river, a deceleration mechanism 30 is provided on the upstream side of the rigid inclined plate, and the deceleration mechanism 30 includes a bracket 23 arranged between the dam body 1 and the river bank B4, and a plurality of chutes 24 are provided on the bracket 23 along the flow direction of the river, and a vertically slidable baffle 25 is provided in each chute 24, and the baffle 25 is provided with a through groove 26, and the through grooves 26 of adjacent baffles 25 are staggered with each other; the upstream side of the bracket 23 is provided with the same number of buoyancy supply blocks 27 as the baffles 25 along the flow direction of the river, and the buoyancy supply blocks 27 are connected to the baffles 25 in a one-to-one correspondence.

[0075] The difference between the rigid inclined plate and the flexible inclined membrane 8 is that the flexible inclined membrane 8 has a lower cost and is easy to install, but the disadvantage of the flexible inclined membrane 8 is its low strength and difficulty in adapting to river areas with larger waves; the rigid inclined plate has greater strength, is difficult to install and has a higher cost, but its advantage is that it can adapt to river areas with larger waves.

[0076] It can be seen that compared with Examples 1 and 2, Example 3 is more suitable for areas with relatively turbulent water flow, while Examples 1 and 2 are more suitable for areas with relatively gentle water flow.

[0077] In order to further improve the ability of Example 3 to resist turbulent water flow, the deceleration mechanism 30 makes the water flow bend through the baffle 25 and the mutually offset grooves 26 on the baffle 25 to reduce the flow speed of the water flow, so as to further prevent the impact of waves on the oil interception mechanism 29.

[0078] Similarly, in order not to affect the normal flow of most water bodies, the baffle 25 is also installed in a floating manner to ensure that the baffle 25 only intercepts waves, and the buoyancy supply block 27 is used to provide power to the baffle 25; and in order to reduce the delay in the sliding of the baffle 25, the buoyancy supply block 27 is deliberately set upstream of the baffle 25 in this embodiment, so that when the wave reaches the buoyancy supply block 27, the baffle 25 is driven to float in advance.

[0079] In order to ensure that each baffle 25 does not interfere with each other, in this embodiment, the baffle 25 and the buoyancy supply block 27 are connected by a U-shaped connecting rod 28 without affecting their respective movements.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spur dam structure suitable for oil recovery in a bifurcated river section, comprising a dam body (1) and a dam head (2), wherein one end of the dam body (1) is connected to a river bank A (3) and the other end is connected to the dam head (2), and is characterized in that: The water-facing surface (5) of the dam body (1) is a sloped surface, a plurality of oil inlet channels (6) are provided on the top of the water-facing surface (5) of the dam body (1), and a transfer mechanism is provided inside the dam body (1); When the water flow in the river section hits the water-facing surface (5), the oil in the water flow can slide along the water-facing surface (5) of the dam body (1) to one or more of the oil inlet channels (6), and the transfer mechanism can merge the oil in each oil inlet channel (6) and connect it to the recovery equipment; An oil pollution interception mechanism (29) is also provided between the dam body (1) and the river bank B (4) to guide the oil pollution on the water flow between the two to the water-facing surface (5) of the dam body (1); The dam body (1) is formed by at least a welded layer (11) and a concrete layer (12) being stacked together; A storage cavity (22) is formed in the welding layer (11), one side of the storage cavity (22) is in communication with the oil inlet channel (6), and the other side is in communication with the drainage channel (15); The transfer mechanism includes an oil tank 2 (31) slidably arranged in the storage cavity (22), the bottom surface of the oil tank 2 (31) is connected to the bottom of the storage cavity (22) through an elastic reset member (14), and a vacuum area is formed between the bottom surface of the oil tank 2 (31) and the bottom surface of the storage cavity (22); the side wall of the oil tank 2 (31) is provided with a connecting hole (21), and the connecting hole (21) can be connected with the drainage channel (15) during the sliding process of the oil tank 2 (31).

2. The spur-dam-like structure suitable for oil recovery in bifurcated river sections according to claim 1, characterized in that: A plurality of mutually parallel deceleration plates (17) are provided in the second oil tank (31), and each of the deceleration plates (17) is provided with a plurality of mutually staggered openings (18).

3. The spur-dam-like structure suitable for oil recovery in bifurcated river sections according to claim 1 is characterized in that: The oil pollution interception mechanism (29) is a rigid inclined plate provided between the dam body (1) and the river bank B (4) or a flexible inclined membrane (8) positioned by a plurality of positioning columns (7); A buoyancy counterweight (10) is provided at the bottom end of the rigid inclined plate or the flexible inclined membrane (8), so that part of the rigid inclined plate or the flexible inclined membrane (8) is immersed in the river.

4. The spur-like dam structure suitable for oil recovery in a branched river section according to claim 3 is characterized in that: A speed reduction mechanism (30) is provided on the upstream side of the rigid inclined plate or the flexible inclined membrane (8).

5. The spur-dam-like structure suitable for oil recovery in bifurcated river sections according to claim 4 is characterized in that: The reducer The structure (30) includes a bracket (23) provided between the dam body (1) and the river bank B (4), wherein a plurality of chutes (24) are provided on the bracket (23) along the flow direction of the river water, wherein vertically slidable baffles (25) are provided in the chutes (24), and through grooves (26) are provided on the baffles (25), and the through grooves (26) of adjacent baffles (25) are staggered with each other.

6. The spur-dam-like structure suitable for oil recovery in a branched river section according to claim 5, characterized in that: The upstream side of the bracket (23) is provided with buoyancy supply blocks (27) in the same number as the baffles (25) in sequence along the flow direction of the river water, and the buoyancy supply blocks (27) are connected to the baffles (25) in a one-to-one correspondence.

7. A method for laying out the spur-like dam structure according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: Step 1: Build the dam; Step 2: Divide the river into multiple intervals according to the flood season, normal water season and dry season, calculate the average water level data of each interval to obtain the maximum and minimum values of the average water level data; Step 3: Add 20-60 cm to the highest and lowest values of the average water level data to obtain value 1 and value 2, and arrange two rows of oil inlet channels (6) on the dam body with value 1 and value 2 as the height respectively; Step 4: With the dam body (1) and the river bank B (4) as the two starting points, an oil interception structure (29) is built between the two at an angle.

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