CN117051764A - Butyl-like dam structure and layout method suitable for oil stain recovery of branched river reach - Google Patents

Abstract

The utility model discloses a butyl-like dam structure and a layout method suitable for oil stain recovery of branched river reach, and relates to the technical field of butyl-like dam structures. The dam structure comprises a dam body and a dam head, wherein one end of the dam body is connected with a river bank A, the other end of the dam body is connected with the dam head, the upstream surface of the dam body is a slope, a plurality of oil liquid inlet channels are formed in the top of the upstream surface of the dam body, and a transfer mechanism is arranged in the dam body; the greasy dirt in the water flow can slide to one or more oil liquid entering channels along the upstream surface of the dam body, and the transfer mechanism can combine the greasy dirt in each oil liquid entering channel and communicate with the recovery equipment; an oil stain interception mechanism is arranged between the dam body and the river bank B; according to the utility model, the greasy dirt on the river surface is intercepted by the greasy dirt interception mechanism, so that the greasy dirt on the river surface is impacted to the greasy dirt interception mechanism, is obliquely guided to the oblique front side of the T-dam structure by the greasy dirt interception mechanism, and is separated from river water by utilizing the upstream surface of the inclined dam body.

Description

Butyl-like dam structure and layout method suitable for oil stain recovery of branched river reach

Technical Field

The utility model relates to the technical field of a similar-dam structure, in particular to a similar-dam structure suitable for recycling oil stains of branched river reach and a layout method.

Background

The branched river reach refers to a branched river channel in a plain river, and particularly refers to a branched river channel in a river bed caused by a beach and an sand, which is also called a plait flow because of being plaited. The branched river reach is easy to block the channel due to sediment accumulation. However, after the block dam is arranged on the shoal river section of the split section of the sand bed of the alluvial river, the river channel is narrowed, the water passing area is reduced, the flow speed is increased, and the original bed surface is deep-punched, so that the effect of 'water-binding sand attack' is achieved.

Take the patent document with application number CN201621283390.9 as an example: it mainly records: the utility model relates to a block dam structure for repairing a shoal channel at a branch section of a sand bed of a alluvial river, wherein a protective structure is arranged on the block dam structure; the protection structure comprises a dam foundation protection structure paved at the bottom of the periphery of the dam foundation, a dam body protection structure paved at the bottom of the periphery of the dam body, a dam head protection structure paved at the bottom of the periphery of the dam head and a lower dam head protection structure paved below the bottom of the dam head and extending from the bottom of the dam head to a riverbed in the vertical direction; the protection structure is formed by paving a plurality of frame hinge rows, the frame hinge rows are formed by connecting a plurality of permeable frames, the permeable frames are hexagonal tetrahedron permeable frames, and the contact angles of the adjacent permeable frames are bent into circles by adopting steel bars to be mutually hinged and connected to form the frame hinge rows; at least one surface of the permeable frame is encrypted by adopting a triangular frame. The T-dam structure has stable structure, long service life and good channel repairing effect, and is beneficial to the adhesion and survival of various aquatic organisms.

Therefore, in the prior art, the butyl dam generally only performs the basic 'water-binding sand-tapping' function, so that the utilization rate of the dam body is not high.

In the process of treating the oil stains of the river, the spur dike cannot assist the oil stain treatment, for example, patent document with the application number of CN 201610723430.5: the utility model discloses an experimental device for intercepting and removing oil stains in a river channel, which comprises an intercepting system and an oil collecting system, wherein the oil collecting system is positioned at one side of the intercepting system; the interception system comprises a plurality of interception units connected in series along the left-right direction, each interception unit comprises a floating row and an oil baffle plate, the floating row comprises a flat plate which is horizontally arranged, the oil baffle plate is arranged on the front side of the flat plate along the length direction of the flat plate, the oil baffle plates are connected with the flat plate through a height adjusting mechanism, two adjacent flat plates are connected through an angle adjusting mechanism, and two adjacent oil baffle plates are connected through a buffer connecting piece; the utility model has the advantages of simple structure, convenient and efficient operation, high safety and reliability, high automation degree, low labor intensity, wide application range and higher efficiency, and the actions of intercepting, recovering and separating the greasy dirt are integrally completed.

Therefore, in the river oil stain treatment process, the river oil stain treatment device mainly singly executes the oil stain interception and recovery functions.

Therefore, it is necessary to design a T-shaped dam structure with both the oil stain interception function and the water-binding sand attack function in the prior art.

Disclosure of Invention

The utility model aims to provide a similar-spur dike structure and a layout method suitable for recycling oil stains in a branched river reach, so as to solve the technical problems.

The utility model provides the following technical scheme:

the utility model provides a class butyl dam structure suitable for divide the greasy dirt recovery of river reach, includes dam body and dam head, and the one end of dam body is connected river bank A and the other end is connected the dam head, and the upstream face of dam body is domatic, and the top of the upstream face of dam body is equipped with a plurality of fluid entering passageway, is equipped with transfer mechanism in the dam body;

when water flow in the river reach impacts the upstream surface, oil stains in the water flow can slide to one or more oil inlet channels along the upstream surface of the dam body, and the transfer mechanism can collect the oil stains in each oil inlet channel and communicate with the recovery equipment;

an oil stain interception mechanism is further arranged between the dam body and the river bank B so as to guide oil stains on water flow between the dam body and the river bank B to the upstream surface of the dam body.

Further, the dam body is formed by overlapping at least the welding layer and the concrete layer.

Further, a storage inner cavity is formed in the welding layer, one side of the storage inner cavity is communicated with the oil liquid inlet channel, and the other side of the storage inner cavity is communicated with the drainage channel;

the transfer mechanism comprises a second oil tank which is slidably arranged in the storage inner cavity, the bottom surface of the second oil tank is connected with the bottom of the storage inner cavity through an elastic reset piece, and a vacuum area is formed between the bottom surface of the second oil tank and the bottom surface of the storage inner cavity in a sealing manner; the second oil tank is provided with a communication hole which can be communicated with the drainage channel in the sliding process of the second oil tank.

Further, a plurality of parallel speed reducing plates are arranged in the second oil tank, and a plurality of staggered openings are formed in each speed reducing plate.

Further, the greasy dirt interception mechanism is a rigid inclined plate arranged between the dam body and the river bank B or a flexible inclined film positioned by a plurality of positioning columns;

the bottom end of the rigid sloping plate or the flexible sloping film is provided with a buoyancy balancing weight, so that part of the rigid sloping plate or the flexible sloping film is immersed in the river.

Further, a speed reducing mechanism is provided on the upstream side of the rigid swash plate or the flexible swash film.

Further, the speed reducing mechanism comprises a support arranged between the dam body and the river bank B, a plurality of sliding grooves are formed in the support along the river water flow direction, baffle plates capable of vertically sliding are arranged in the sliding grooves, through grooves are formed in the baffle plates, and the through grooves of the adjacent baffle plates are staggered.

Further, the upstream side of the bracket is sequentially provided with buoyancy supply blocks with the same number as the baffles along the river flow direction, and the buoyancy supply blocks are connected with the baffles in a one-to-one correspondence manner.

The layout method is used for laying the T-shaped dam structure and comprises the following steps:

step 1: constructing a dam body;

step 2: dividing the river flow into a plurality of intervals in a high water period, a flat water period and a dead water period, and calculating average water level data of each interval to obtain the highest value and the lowest value of the average water level data;

step 3: adding 20-60cm on the basis of the highest value and the lowest value of the average water level data, so as to obtain a value I and a value II, and respectively arranging two oil discharge liquid inlet channels on the dam body by taking the value I and the value II as heights;

step 4: and using the dam body and the river bank B as two starting points, and obliquely establishing an oil stain interception mechanism between the dam body and the river bank B.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the greasy dirt on the river surface is intercepted by the greasy dirt interception mechanism, so that the greasy dirt on the river surface is impacted to the greasy dirt interception mechanism and is obliquely guided to the oblique front side of the spur dike structure by the greasy dirt interception mechanism; because the density of the greasy dirt in the river is smaller than that of water, the greasy dirt and the river water are layered and then float on the surface of the river water, the upstream surface of the river impact dam body slides upwards along the upstream surface of the inclined dam body, the greasy dirt with smaller density can slide upwards for a longer distance on the upstream surface, and an oil liquid entering channel is formed in the top end of the upstream surface of the T-bar structure, so that the greasy dirt which slides upwards further can enter the oil liquid entering channel, and the separation of the greasy dirt and the river water is realized by utilizing the upstream surface of the inclined dam body.

In addition, other effects of the present utility model will be specifically described by the following examples.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic overall structure of embodiment 1;

fig. 2 is a schematic structural diagram of an oil stain blocking mechanism in embodiment 1;

FIG. 3 is a longitudinal cut of the dam of example 1;

FIG. 4 is a schematic diagram of a dam of embodiment 2;

fig. 5 is a schematic structural diagram of a solder layer of embodiment 2;

FIG. 6 is a longitudinal cut of the weld layer of example 2;

FIG. 7 is a schematic overall structure of embodiment 3;

fig. 8 is a schematic structural diagram of an oil stain blocking mechanism in embodiment 3.

Reference numerals:

1. a dam body; 2. a dam head; 3. river bank A; 4. river bank B; 5. a water-facing surface; 6. the oil enters the channel; 7. positioning columns; 8. a flexible inclined membrane; 9. a sleeve; 10. a buoyancy balancing weight; 11. a welding layer; 12. a concrete layer; 13. a first suction channel; 14. an elastic reset piece; 15. a drainage channel; 16. a drawing port; 17. a speed reducing plate; 18. an opening; 19. an oil tank I; 20. a second suction channel; 21. a communication hole; 22. a storage lumen; 23. a bracket; 24. a chute; 25. a baffle; 26. a through groove; 27. a buoyancy supply block; 28. a U-shaped connecting rod; 29. an oil stain interception mechanism; 30. a speed reducing mechanism; 31. and a second oil tank.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model aims to solve the problem that the functions of a river oil pollution treatment device and a similar-dam structure are too single, and can be seen that when the river oil pollution treatment function and the water-binding sand attack function are needed by the same branch river reach, the river oil pollution treatment device and the similar-dam structure are needed to be overlapped.

However, the butyl-like dam structure suitable for recycling the oil stain of the branched river reach in the embodiment mainly comprises two parts: a butyl dam function part and an oil stain interception function part.

The T-dam functional part in the utility model not only can play a role of 'binding water and tapping sand' for the river channel, but also can play a role of contracting the river channel, and at the moment, the greasy dirt interception functional part only needs to intercept the part of the original river channel.

The core idea of the utility model is seen in that: the greasy dirt on the river surface is intercepted by the greasy dirt interception functional part, so that the greasy dirt on the river surface is impacted to the greasy dirt interception mechanism 29, and is obliquely guided to the oblique front side of the spur dike structure by the greasy dirt interception mechanism 29, and the greasy dirt is recovered by taking the spur dike structure as a carrier.

The cross section of the dam body 1 is generally trapezoid, therefore, the upstream surface 5 of the dam body 1 is generally inclined, because the density of oil stain in a river is smaller than that of water, the oil stain is generally layered with the river water and then floats on the surface of the river water, the upstream surface 5 of the river impacting the dam body 1 slides upwards along the inclined upstream surface 5 of the dam body 1, at the moment, the oil stain with smaller density can slide upwards for a longer distance on the upstream surface 5, and an oil-liquid inlet channel 6 is formed at the top end of the upstream surface 5 of the spur dike structure, so that the oil stain which slides upwards further can enter the oil-liquid inlet channel 6, and separation of the oil stain and the river water is realized.

In addition, the oil stain recovery equipment in the prior art can be arranged in the T-dam structure, so that the space utilization rate of the T-dam structure is improved; the oil stain recovery equipment can be arranged on the river bank A3, and the pipeline is buried by utilizing the space inside the T-bar structure, so that the space utilization rate of the T-bar structure is also improved.

It can be seen that the butyl dam structure is the carrier of greasy dirt recovery's advantage lies in: the device is recovered through the T-dam structure, fully utilizes the internal space of the dam body 1 and the characteristic of firm structure of the T-dam, and also utilizes the characteristic of the T-dam structure with the ramp upstream surface 5 to realize automatic separation of greasy dirt and river water to a certain extent.

The following will illustrate by way of specific examples.

Example 1

As shown in fig. 1, 2 and 3, in order to enrich the functions of a dam body 1 and utilize the space of the dam body 1, the utility model provides a butyl-like dam structure suitable for recycling oil stains of a branch river reach, which comprises the dam body 1 and a dam head 2, wherein one end of the dam body 1 is connected with a river bank A3, the other end of the dam body 1 is connected with the dam head 2, the upstream surface 5 of the dam body 1 is a slope, a plurality of oil liquid inlet channels 6 are arranged at the top of the upstream surface 5 of the dam body 1, and a transfer mechanism is arranged in the dam body 1; when the water flow in the river reach impacts the upstream surface 5, the greasy dirt in the water flow can slide to one or more oil liquid inlet channels 6 along the upstream surface 5 of the dam body 1, and the channels can combine the greasy dirt in each oil liquid inlet channel 6 and communicate with recovery equipment; an oil stain interception mechanism 29 is further arranged between the dam body 1 and the river bank B4 so as to guide oil stains on water flow between the dam body 1 and the river bank B4 to the upstream surface 5 of the dam body 1.

The greasy dirt interception mechanism 29 of this embodiment includes a plurality of positioning posts 7 arranged in diagonal lines between the dam head 2 and the river bank B4, and then a flexible inclined film 8 is arranged between every two positioning posts 7.

In order to minimize the influence of the flexible inclined membrane 8 on the water flow of the river, the flexible inclined membrane 8 is generally only submerged at the bottom; thus, the flexible inclined film 8 of the present embodiment is mounted on the positioning column 7 by the following method:

firstly, the length of a flexible inclined membrane 8 is the inclined line length of a positioning column 7, then a sleeve 9 structure is formed at the position, corresponding to the positioning column 7, on the flexible inclined membrane 8 through glue adhesion or hot pressing, the sleeve 9 structure is sequentially sleeved on the positioning column 7 in a sliding mode, the top end of the positioning column 7 and the top end of the flexible inclined membrane 8 are fixed, a buoyancy balancing weight 10 is arranged at the bottom end of the flexible inclined membrane 8, the buoyancy balancing weight 10 is generally of a multi-layer structure, the upper layer is of a foam structure with larger buoyancy, the lower layer is of a metal structure with larger density, and when the water level floats along with waves, the bottom end sinking amplitude of the flexible inclined membrane 8 is controlled to be as much as possible between 10cm and 30 cm.

The dam body 1 in the embodiment is formed by pouring concrete, but before pouring, an oil tank I19 communicated with the oil inlet channel 6 is pre-embedded at the top of the dam body, the oil inlet channel 6 and the oil tank I19 are both made of steel materials, a suction channel I13 is communicated with the oil tank I19, the suction channel I13 is connected with oil stain recovery equipment, and particularly an input pipe of a pump of the oil stain recovery equipment is communicated with the suction channel I13.

The embodiment also provides a layout method, which is particularly suitable for layout of the dam-like structure, and comprises the following steps:

step 1: constructing a dam body 1;

step 2: dividing the river flow into a plurality of intervals in a high water period, a flat water period and a dead water period, and calculating average water level data of each interval to obtain the highest value and the lowest value of the average water level data;

step 3: adding 20-60cm on the basis of the highest value and the lowest value of the average water level data to obtain a value I and a value II, and respectively arranging two oil discharge liquid inlet channels 6 on the dam body 1 by taking the value I and the value II as heights;

step 4: the dam 1 and the river bank B4 are taken as two starting points, and an oil stain interception mechanism 29 is obliquely built between the two starting points.

Example 2

The difference from the above embodiment 1 is that:

as shown in fig. 4, 5 and 6, the dam body 1 in this embodiment is formed by at least two layers, the two layers are a welding layer 11 and a concrete layer 12, the welding layer 11 is formed by welding steel frames, a storage inner cavity 22 is formed in the welding layer 11, one side of the storage inner cavity 22 is communicated with the oil liquid inlet channel 6, the other side is communicated with a drainage channel 15, a second oil tank 31 capable of vertically sliding and resetting is arranged in the storage inner cavity 22 through an elastic resetting piece 14, a communication hole 21 is arranged on the side surface of the second oil tank 31, and a vacuum area is formed between the bottom of the second oil tank 31 and the bottom of the storage inner cavity 22 in a sealing manner.

When the oil liquid in the oil liquid inlet channel 6 is converged into the storage inner cavity 22, the oil liquid gradually enters the oil tank II 31, the oil tank II 31 is mainly supported by the elastic reset piece 14, when the weight of the oil liquid in the oil tank II 31 is gradually increased after the oil liquid is converged, the elastic reset piece 14 is gradually compressed under the gravity, the communication hole 21 of the oil tank II 31 is gradually communicated with the drainage channel 15 along with the sliding of the oil tank II 31, so that the liquid at the bottom of the oil tank II 31 is discharged, and when the liquid at the bottom of the oil tank II 31 is discharged, the oil tank II 31 is reset and slides upwards under the action of the elastic reset piece 14.

The advantage of thus setting up the second tank 31 is that: when the river surface is affected by wind power, waves are formed on the river surface, more water is flushed into the oil liquid entering channel 6 by the waves, the second oil tank 31 can play a standing role, the oil liquid and the water are kept stand for a period of time in the second oil tank 31, the time for standing and separating the oil liquid and the water can be provided, in order to operate the separated oil liquid and the separated water respectively, the second suction channel 20 is arranged at the top end of the second oil tank 31, and the communication hole 21 is arranged at the bottom of the second oil tank 31.

In order to further improve the standing layering effect of the oil tank II 31 on the oil-water mixture, a plurality of speed reducing plates 17 are arranged in the oil tank II 31, a plurality of openings 18 which are staggered with each other are formed in the speed reducing plates 17, and the effect of reducing the speed of liquid is achieved by preventing vertical direct current of oil liquid, so that the time required for standing layering is shortened.

In order to adapt to the sliding characteristic of the second tank 31, the second suction channel 20 is configured as a telescopic pipe, the bottom end of the telescopic pipe is fixedly connected with the speed reducing plate 17 at the uppermost layer of the second tank 31, the telescopic pipe is extracted through the short extraction port 16, and the top end of the telescopic pipe is connected with the recovery device.

Example 3

The difference from example 2 is that:

as shown in fig. 7 and 8, the oil stain blocking mechanism 29 in this embodiment is a rigid inclined plate, the bottom end of the rigid inclined plate is provided with a buoyancy balancing weight 10 (not shown in fig. 7), so that a part of the rigid inclined plate is immersed in a river, the upstream side of the rigid inclined plate is provided with a speed reducing mechanism 30, the speed reducing mechanism 30 comprises a bracket 23 arranged between a dam body 1 and a river bank B4, a plurality of sliding grooves 24 are arranged on the bracket 23 along the river flow direction, each sliding groove 24 is internally provided with a baffle 25 capable of sliding vertically, the baffle 25 is provided with a through groove 26, and the through grooves 26 of adjacent baffle 25 are staggered with each other; the upstream side of the bracket 23 is provided with buoyancy supply blocks 27 in the same number as the baffles 25 in order along the river flow direction, and the buoyancy supply blocks 27 are connected to the baffles 25 in one-to-one correspondence.

The difference between the rigid swash plate and the flexible swash film 8 is that: the flexible inclined membrane 8 has lower cost and easy installation, and the flexible inclined membrane 8 has lower strength and is difficult to adapt to river areas with larger waves; the rigid sloping plate has the advantages of high strength, difficult installation and high cost, and can adapt to river areas with large waves.

It can be seen that example 3 is more suitable for areas where the water flow is more turbulent than examples 1 and 2, while examples 1 and 2 are more suitable for areas where the water flow is more gentle.

To further increase the turbulence resistant capability of example 3, the speed reducing mechanism 30 makes the water flow in a curved manner through the baffle 25 and the mutually offset through grooves 26 on the baffle 25, so as to reduce the flow velocity of the water flow, and further prevent the impact of the waves on the oil dirt interception mechanism 29.

Similarly, in order not to affect the normal flow of most of the water, the baffle 25 is also mounted in a floating manner, so as to ensure that only waves of the baffle 25 are intercepted, and the buoyancy supply block 27 is used for providing power for the baffle 25; also in order to reduce the delay in the sliding of the baffles 25, buoyancy feed blocks 27 are deliberately provided upstream of the baffles 25 in this embodiment so that the baffles 25 are driven to float in advance when waves reach the buoyancy feed blocks 27.

In order to ensure that each of the baffles 25 does not interfere with each other, in this embodiment the baffles 25 and buoyancy feed blocks 27 are connected by a U-shaped link 28 without affecting the respective movements.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (9)

1. The utility model provides a class butyl dam structure suitable for divide branch river reach greasy dirt to retrieve, includes dam body (1) and dam head (2), the one end of dam body (1) is connected river bank A (3) and the other end is connected dam head (2), its characterized in that, upstream face (5) of dam body (1) are domatic, the top of upstream face (5) of dam body (1) is equipped with a plurality of fluid entering passageway (6), be equipped with transfer mechanism in dam body (1);

when the water flow in the river reach impacts the upstream surface (5), oil stains in the water flow can slide to one or more oil liquid inlet channels (6) along the upstream surface (5) of the dam body (1), and the transfer mechanism can combine the oil stains in each oil liquid inlet channel (6) and communicate with recovery equipment;

an oil stain interception mechanism (29) is further arranged between the dam body (1) and the river bank B (4) so as to guide oil stains on water flow between the dam body (1) to the upstream surface (5) of the dam body (1).

2. The spur dike-like structure suitable for the oil stain recovery of branched river reach according to claim 1, wherein: the dam body (1) is formed by overlapping a welding layer (11) and a concrete layer (12).

3. The spur dike-like structure suitable for the oil stain recovery of branched river reach according to claim 2, wherein: a storage inner cavity (22) is formed in the welding layer (11), one side of the storage inner cavity (22) is communicated with the oil liquid inlet channel (6), and the other side of the storage inner cavity is communicated with the drainage channel (15);

the transfer mechanism comprises a second oil tank 31 (31) which is slidably arranged in the storage inner cavity 22, the bottom surface of the second oil tank 31 (31) is connected with the bottom of the storage inner cavity 22 through an elastic reset piece 14, and a vacuum area is formed between the bottom surface of the second oil tank 31 (31) and the bottom surface of the storage inner cavity 22 in a sealing manner; the side wall of the second oil tank 31 (31) is provided with a communication hole 21, and the communication hole 21 can be communicated with the drainage channel 15 in the sliding process of the second oil tank 31 (31).

4. The spur dike-like structure for oil stain recovery in branched river reach according to claim 3, wherein: a plurality of mutually parallel speed reduction plates (17) are arranged in the oil tank II (31), and a plurality of mutually staggered openings (18) are formed in each speed reduction plate (17).

5. The spur dike-like structure suitable for the oil stain recovery of branched river reach according to claim 1, wherein: the greasy dirt interception mechanism (29) is a rigid inclined plate arranged between the dam body (1) and the river bank B (4) or a flexible inclined film (8) positioned by a plurality of positioning columns (7);

the bottom end of the rigid inclined plate or the flexible inclined membrane (8) is provided with a buoyancy balancing weight (10) so that the rigid inclined plate or the flexible inclined membrane (8) is partially immersed in a river.

6. The spur dike-like structure for oil stain recovery in branched river reach according to claim 5, wherein: a speed reducing mechanism (30) is arranged on the upstream side of the rigid inclined plate or the flexible inclined film (8).

7. The spur dike-like structure suitable for the recovery of branched-end-section oil stains according to claim 6, wherein: the speed reducing mechanism (30) comprises a support (23) arranged between the dam body (1) and the river bank B (4), a plurality of sliding grooves (24) are formed in the support (23) along the river flow direction, baffle plates (25) capable of vertically sliding are arranged in the sliding grooves (24), through grooves (26) are formed in the baffle plates (25), and the through grooves (26) of the adjacent baffle plates (25) are staggered.

8. The spur dike-like structure suitable for the recovery of branched-end-section oil stains according to claim 7, wherein: the upstream side of the bracket (23) is sequentially provided with buoyancy supply blocks (27) the same as the baffles (25) in number along the river flow direction, and the buoyancy supply blocks (27) are connected with the baffles (25) in a one-to-one correspondence manner.

9. A layout method for laying the butyl-like dam structure of any one of claims 1-8, the method comprising the steps of:

step 1: constructing a dam body;

step 2: dividing the river flow into a plurality of intervals in a high water period, a flat water period and a dead water period, and calculating average water level data of each interval to obtain the highest value and the lowest value of the average water level data;

step 3: increasing 20-60cm on the basis of the highest value and the lowest value of the average water level data to obtain a value I and a value II, and respectively arranging two oil discharge liquid inlet channels (6) on the dam body by taking the value I and the value II as heights;

step 4: the dam body (1) and the river bank B (4) are taken as two starting points, and an oil pollution interception mechanism (29) is obliquely established between the dam body and the river bank B.