Water flow energy dissipation and scour prevention structure of silt foundation

Abstract

The utility model relates to the technical field of water flow energy dissipation and scour prevention, and discloses a silt foundation water flow energy dissipation and scour prevention structure which comprises a deflecting water channel, a flow dividing mechanism arranged on the right side of the deflecting water channel and an energy dissipation mechanism arranged in the flow dividing mechanism. The diversion mechanism comprises a powder spraying pile fixedly mounted at the bottom of the deflecting water channel, a stone powder cushion layer fixedly mounted at the top of the powder spraying pile, geotechnical cloth fixedly mounted at the top of the stone powder cushion layer, a sand cushion layer fixedly mounted at the top of the geotechnical cloth, and a diversion and energy dissipation mechanism for water flow diversion and energy dissipation. According to the water flow energy dissipation and scour prevention structure for the silt foundation, by arranging the diversion mechanism, the purpose of diversion of water flow is achieved, the passing water flow is subjected to hydraulic jump on the geotechnical bag to form rotary rolling, energy of the water flow is consumed to a certain degree through aeration and mutual collision and friction of water molecules, and therefore serious scour of the downstream is reduced or prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of water flow energy dissipation and anti-scouring, in particular to a water flow energy dissipation and anti-scouring structure for a muddy foundation. Background Art

[0002] In the construction of water conservancy and hydropower projects, there is often a thick silt layer at the foundation of most sluices in coastal areas. During the operation of the sluice, there is a large flow rate of water upstream and downstream of the sluice, and the flow rate of water is uneven at the upstream and downstream positions of the sluice. The water flow will continue to wash the riverbed upstream and downstream of the sluice, and the silt in the riverbed will flow to the downstream of the sluice along with the water flow, causing soil erosion upstream of the sluice.

[0003] According to the announcement number CN216515549U, a hydraulic energy dissipation and anti-scour structure suitable for silt foundation is proposed. The hydraulic energy dissipation and anti-scour structure suitable for silt foundation adopts the hydraulic energy dissipation and anti-scour structure of the utility model, which is simple to construct, economical and has a guaranteed construction period. The silt foundation can be effectively treated, the structure has high strength and good stability, can better adapt to the deformation of the riverbed, improve the anti-scour ability of the riverbed, and protect the riverbed from being damaged. The powder injection piles evenly inserted in the riverbed have a good supporting effect on the riverbed, and a crushed stone cushion layer, a sand cushion layer and a stone powder cushion layer are paved on the riverbed from top to bottom in sequence. The size of the filling stone filled in the protective cushion layer gradually decreases from top to bottom, and a concrete frame is paved on the protective cushion layer and a metal mesh box gabion filled with block stones is installed in the concrete frame, which provides a good anti-scour ability for the riverbed.

[0004] However, the water energy dissipation and anti-scouring structure suitable for silt foundation improves the anti-scouring capacity of the riverbed through the energy dissipation and anti-scouring structure, but does not divert the water flow, so that the water flow will continue to scour a certain place, making the water energy dissipation and anti-scouring structure at that place easy to wear. Therefore, a water flow energy dissipation and anti-scouring structure for silt foundation is proposed to solve the above problem. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a water energy dissipation and anti-scouring structure for a silt foundation, which has the advantage of diverting water flow for scouring and energy dissipation, and solves the problem that the water energy dissipation and anti-scouring structure suitable for silt foundation improves the anti-scouring capacity of the riverbed through the energy dissipation and anti-scouring structure, but does not divert the water flow, so that the water flow will continue to scour a certain place, making the water energy dissipation and anti-scouring structure at that place easy to wear.

[0006] In summary, the utility model provides the following technical solutions: a water flow energy dissipation and anti-scouring structure for a muddy foundation, comprising a diversion waterway, a diversion mechanism arranged on the right side of the diversion waterway, and an energy dissipation mechanism arranged inside the diversion mechanism;

[0007] The diversion mechanism includes a powder injection pile fixedly installed at the bottom of the diversion waterway, a stone powder cushion fixedly installed on the top of the powder injection pile, a geotextile fixedly installed on the top of the stone powder cushion, a sand cushion fixedly installed on the top of the geotextile and a diversion and dissipation mechanism for water flow diversion and energy dissipation;

[0008] The diversion mechanism comprises a diversion pile fixedly installed on the top of the sand cushion layer and a geotextile bag fixedly installed on the top of the sand cushion layer.

[0009] The utility model achieves the purpose of diverting water flow by adopting the above technical scheme and providing a diverting mechanism. The passing water generates a water jump on the geotextile bag to form a vortex, so that the energy of the water flow is consumed to a certain extent through aeration, mutual collision and friction of water molecules, so as to reduce or prevent serious scouring downstream.

[0010] Furthermore, the energy dissipation mechanism includes a concrete dam fixedly installed on the right side of the diversion waterway.

[0011] The utility model adopts the above technical scheme and is provided with an energy dissipation mechanism, so as to protect the muddy foundation, better adapt to the deformation of the riverbed, improve the anti-scouring ability of the riverbed, and protect the riverbed from being damaged.

[0012] Furthermore, the length of the powder injection pile is five meters, the diameter is fifty centimeters, and the distance between two adjacent powder injection piles is one and a half meters.

[0013] The beneficial effect of adopting the above further solution is that the powder injection piles uniformly inserted into the riverbed play a good supporting role on the riverbed.

[0014] Furthermore, the diverter pile is triangular in shape when viewed from top to bottom, and the left side of the diverter pile is semicircular in shape.

[0015] The beneficial effect of adopting the above further solution is that the diversion pile diverts the water flow.

[0016] Furthermore, the stone powder cushion layer, geotextile and sand cushion layer together form a group of protective cushion layers.

[0017] The beneficial effect of adopting the above further solution is that the protective cushion layer creates conditions for the construction of diversion piles and geotextile bags.

[0018] Furthermore, blocks of stone are fixedly installed on the top of the protective cushion layer, and metal mesh gabions are laid on the top of the blocks of stone.

[0019] The beneficial effect of adopting the above further solution is that the block stones and metal mesh gabions provide good anti-scouring ability for the riverbed.

[0020] Furthermore, the metal mesh gabion is distributed between opposite sides of two diversion piles, and the height of the metal mesh gabion is lower than that of the geobag.

[0021] The beneficial effect of adopting the above further solution is that the metal mesh gabion will not affect the functions of the diversion piles and geotextile bags.

[0022] Furthermore, the metal mesh gabion is filled with crushed stones, and the top surface of each layer of crushed stones in the metal mesh gabion is flat.

[0023] The beneficial effect of adopting the above further solution is that the crushed stones reduce the scouring of the riverbed by the water flow.

[0024] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0025] The water flow energy dissipation and anti-scouring structure of the silt foundation achieves the purpose of diverting the water flow by providing a diversion mechanism. The passing water generates a water jump on the geotextile bag to form a vortex, so that the energy of the water flow is consumed to a certain extent through aeration, mutual collision and friction of water molecules, so as to reduce or prevent serious scouring downstream. The energy dissipation mechanism is provided to protect the silt foundation, better adapt to the deformation of the riverbed, improve the anti-scouring ability of the riverbed, and protect the riverbed from being destroyed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 The utility model structure Figure 1 A top view of a cross section;

[0028] Figure 3 It is a stereoscopic diagram of the diversion pile and geotextile bag of the utility model structure.

[0029] Description of reference numerals:

[0030] 1. Diversion channel; 2. Diversion mechanism; 201. Powder injection pile; 202. Stone powder cushion layer; 203. Geotextile; 204. Sand cushion layer; 205. Diversion pile; 206. Geotextile bag; 3. Energy dissipation mechanism; 301. Concrete retaining dam; 302. Stone; 303. Metal mesh gabion; 304. Gravel. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1 In this embodiment, a water flow energy dissipation and anti-scour structure for a muddy foundation includes a diversion waterway 1, a diversion mechanism 2 arranged on the right side of the diversion waterway 1, and an energy dissipation mechanism 3 arranged inside the diversion mechanism 2. The diversion mechanism 2 includes a powder injection pile 201 fixedly installed at the bottom of the diversion waterway 1. The powder injection pile 201 has a length of five meters and a diameter of fifty centimeters. The distance between two adjacent powder injection piles 201 is one and a half meters.

[0033] Among them, the diversion mechanism 2 also includes a stone powder cushion layer 202 fixedly installed on the top of the powder injection pile 201, a geotextile 203 fixedly installed on the top of the stone powder cushion layer 202, a sand cushion layer 204 fixedly installed on the top of the geotextile 203 and a diversion and energy dissipation mechanism for water flow diversion. The stone powder cushion layer 202, the geotextile 203, and the sand cushion layer 204 together constitute a group of protective cushion layers.

[0034] The diversion mechanism includes a diversion pile 205 fixedly installed on the top of the sand cushion layer 204 and a geotextile bag 206 fixedly installed on the top of the sand cushion layer 204. The diversion pile 205 is triangular in shape when viewed from top to bottom, and the left side of the diversion pile 205 is semicircular in shape.

[0035] Specifically, a 10 cm thick stone powder cushion layer 202 is paved on the right side of the diversion waterway 1, and the stone powder cushion layer 202 is compacted by a frog-type rammer. After the stone powder cushion layer 202 is compacted, the powder injection pile 201 is constructed. A powder injection pile 201 with a length of 5 meters and a diameter of 50 cm is installed at every 1.5 meters on the riverbed. After the construction of the powder injection pile 201 is completed, the upper stone powder cushion layer 202 is leveled and compacted again, and a geotextile 203 is laid on the upper part of the stone powder cushion layer 202. After the geotextile 203 is laid, a sand cushion layer 204 with a thickness of 20 cm is laid on the upper part of the geotextile 203. After the construction of the sand cushion layer 204 is completed, the concrete retaining dam 301, diversion piles 205 and geotextile bags 206 are constructed, thereby achieving the purpose of diverting the water flow. The passing water jumps on the geotextile bag 206 to form a vortex, so that the energy of the water flow is consumed to a certain extent through aeration, mutual collision and friction of water molecules, so as to reduce or prevent severe scouring in the downstream.

[0036] See also Figure 2 and Figure 3The energy dissipation mechanism 3 includes a concrete retaining dam 301 fixedly installed on the right side of the diversion waterway 1, a block stone 302 is fixedly installed on the top of the protective cushion layer, and a metal mesh gabion 303 is laid on the top of the block stone 302.

[0037] The metal mesh gabion 303 is distributed between the opposite sides of the two diversion piles 205, the height of the metal mesh gabion 303 is lower than the geobag 206, the metal mesh gabion 303 is filled with crushed stone 304, and the top surface of each layer of crushed stone 304 in the metal mesh gabion 303 is flat.

[0038] Specifically, blocks 302 are paved on top of the sand cushion layer 204, and then metal mesh gabions 303 are placed on the left and right sides of the geobag 206. Finally, gravel 304 is filled into the metal mesh gabions 303, and the top of the metal mesh gabions 303 is sealed, which can better adapt to the deformation of the riverbed, improve the anti-impact capacity of the riverbed, and protect the riverbed from being damaged.

[0039] The working principle of the above embodiment is:

[0040] (1) On the right side of the diversion channel 1, a 10 cm thick stone powder cushion layer 202 is paved. The stone powder cushion layer 202 is compacted by a frog-type rammer. After the stone powder cushion layer 202 is compacted, the powder injection pile 201 is constructed. A powder injection pile 201 with a length of 5 meters and a diameter of 50 cm is installed every 1.5 meters on the riverbed. After the construction of the powder injection pile 201 is completed, the upper stone powder cushion layer 202 is leveled and compacted again. A geotextile 203 is laid on the upper part of the stone powder cushion layer 202. After the geotextile 203 is laid, a 20 cm thick sand cushion layer 204 is laid on the upper part of the geotextile 203.

[0041] (2) After the construction of the sand cushion layer 204 is completed, the concrete retaining dam 301, diversion piles 205 and geotextile bags 206 are constructed, and the block stones 302 are paved on the top of the sand cushion layer 204. Then, the metal mesh gabion 303 is placed on the left and right sides of the geotextile bag 206. Finally, the metal mesh gabion 303 is filled with crushed stones 304, and the top of the metal mesh gabion 303 is sealed.

Claims

1. A water flow energy dissipation and anti-scouring structure for a muddy foundation, characterized in that: It comprises a diverting waterway (1), a diverting mechanism (2) arranged on the right side of the diverting waterway (1), and an energy dissipation mechanism (3) arranged inside the diverting mechanism (2); The diversion mechanism (2) comprises a powder injection pile (201) fixedly mounted at the bottom of the diversion waterway (1), a stone powder cushion layer (202) fixedly mounted on the top of the powder injection pile (201), a geotextile (203) fixedly mounted on the top of the stone powder cushion layer (202), a sand cushion layer (204) fixedly mounted on the top of the geotextile (203), and a diversion mechanism for dissipating water flow energy; The diversion mechanism comprises a diversion pile (205) fixedly installed on the top of the sand cushion layer (204) and a geotextile bag (206) fixedly installed on the top of the sand cushion layer (204).

2. The water flow energy dissipation and anti-scour structure for muddy foundation according to claim 1, characterized in that: The energy dissipation mechanism (3) comprises a concrete dam (301) fixedly installed on the right side of the diversion waterway (1).

3. The water flow energy dissipation and anti-scour structure for muddy foundation according to claim 1, characterized in that: The powder injection pile (201) has a length of five meters and a diameter of fifty centimeters, and the distance between two adjacent powder injection piles (201) is one and a half meters.

4. The water flow energy dissipation and anti-scour structure for muddy foundation according to claim 1, characterized in that: The diversion pile (205) is triangular in shape when viewed from top to bottom, and the left side of the diversion pile (205) is semicircular in shape.

5. The water flow energy dissipation and anti-scour structure for muddy foundation according to claim 2, characterized in that: The stone powder cushion layer (202), the geotextile (203), and the sand cushion layer (204) together form a group of protective cushion layers.

6. The water flow energy dissipation and anti-scour structure for muddy foundation according to claim 5, characterized in that: A block stone (302) is fixedly installed on the top of the protective cushion layer, and a metal mesh gabion (303) is laid on the top of the block stone (302).

7. The water flow energy dissipation and anti-scour structure for muddy foundation according to claim 6, characterized in that: The metal mesh gabion (303) is distributed between the two opposite sides of the diversion piles (205), and the height of the metal mesh gabion (303) is lower than the geotextile bag (206).

8. The water flow energy dissipation and anti-scour structure for muddy foundation according to claim 6, characterized in that: The metal mesh gabion (303) is filled with crushed stones (304), and the top surface of each layer of crushed stones (304) in the metal mesh gabion (303) is flat.

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