Stone-inserted concrete apron energy dissipation and scour prevention structure

Abstract

A stone-inserted concrete apron energy dissipation and scour prevention structure belongs to the field of hydraulic engineering structures and comprises a plurality of stone-inserted concrete apron blocks which are spliced with one another, and gaps are reserved between the stone-inserted concrete apron blocks. Each stone-inserted concrete apron block comprises reinforced concrete sashes on the periphery and a rubble concrete layer in the rubble concrete block. A plurality of protruding inserted stones are arranged on the top of the rubble concrete layer. And a gap separating plate is arranged in the gap. The inserted stones are embedded into rubble concrete, friction with water flow is increased, complementary energy can be eliminated, flow velocity distribution can be adjusted, water flow out of a pool can be evenly diffused, a downstream riverbed can be protected from being scoured, meanwhile, reinforcing steel bars are arranged in concrete lattices, the bearing capacity of the concrete is enhanced, cracking is prevented, and the overall durability and anti-seismic performance of the structure are improved. The rubble concrete is filled in the reinforced concrete sash, local materials are used, and engineering investment is saved. The problem that discharged water flow scours and destroys an apron and a riverbed can be effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic engineering structures, specifically referring to a stone-inserted concrete aqueduct energy dissipation and erosion prevention structure, which includes a reinforced concrete frame around the perimeter, a rubble concrete filling in the middle, and stone-inserted concrete blocks forming a stone-inserted concrete aqueduct at the top. The aqueduct blocks are spliced ​​together to form the stone-inserted concrete aqueduct energy dissipation and erosion prevention structure. Background Technology

[0002] When the water depth downstream of hydraulic structures such as dams and gates is relatively shallow, the energy dissipation efficiency of hydraulic jumps downstream of the dam is low, and the discharged water has a large flow velocity after flowing out of the stilling basin. The stability and scouring resistance of sandy riverbeds are poor, and the constant scouring effect of the rapid discharge will have an adverse impact on the stability of the upstream and downstream riverbeds of the seawall.

[0003] Currently, to reduce the scouring impact of downstream water flow on the riverbed downstream of hydraulic structures such as dams and gates, a revetment structure is typically formed by pouring concrete or laying gabions downstream of the stilling basin. However, existing revetment structures suffer various forms of damage from the long-term scouring of rapidly flowing water. Concrete revetments are prone to uneven settlement, which can lead to structural failure; gabion revetments have poor durability and are easily damaged in their upstream sections; insufficient energy dissipation in the revetment section can result in large scour pits in the downstream riverbed. After the revetment structure is damaged, the scouring effect of the water flow will continue to damage the stilling basin, thereby threatening the overall safety of the hydraulic structures.

[0004] To solve the above problems, a stone-inserted concrete seawall energy dissipation and erosion prevention structure with simple structure, reliable technology, strong durability and good landscape effect is invented. It is connected to the stilling basin upstream and to the gabion seawall downstream. Utility Model Content

[0005] The purpose of this invention is to provide a concrete apron energy dissipation and scour prevention structure with inserted stones, which helps to eliminate residual energy and solves the problem of scour and damage to the apron and downstream riverbed.

[0006] The technical solution adopted is:

[0007] A stone-insulated concrete seawall energy dissipation and erosion protection structure includes multiple stone-insulated concrete seawall blocks, characterized in that: the multiple stone-insulated concrete seawall blocks are spliced ​​together and gaps are provided between them.

[0008] The rubble concrete seawall consists of a surrounding reinforced concrete frame and an inner rubble concrete layer.

[0009] Multiple protruding insert stones are placed on top of the rubble concrete layer.

[0010] A partition plate is installed inside the gap.

[0011] Its advantages are:

[0012] This invention, employing the aforementioned structure, embeds the inserted stones into the rubble concrete, increasing friction with the water flow. This helps eliminate residual energy, adjusts the flow velocity distribution, and evenly disperses the water flow from the pool, protecting the downstream riverbed from erosion. Simultaneously, the reinforcement within the concrete frame enhances the concrete's load-bearing capacity, prevents cracking, and improves the overall durability and seismic performance of the structure. The rubble concrete filling within the reinforced concrete frame allows for the use of locally sourced materials, saving on project investment. This structure effectively solves the problem of downstream water flow erosion and damage to the seawall and riverbed. Attached Figure Description

[0013] Figure 1 This is a plan view of a concrete aquifer energy dissipation and erosion protection structure.

[0014] Figure 2 This is a plan view of the concrete seawall section.

[0015] Figure 3 yes Figure 2 Cross-sectional view at point AA.

[0016] In the diagram: 1. Stone-inserted concrete seawall block; 2. Reinforced concrete frame; 3. Rubble concrete layer; 4. Stone inserts; 5. Joint board; 6. Crushed stone cushion layer. Detailed Implementation

[0017] A stone-filled concrete aqueduct energy dissipation and erosion prevention structure is provided, which consists of multiple stone-filled concrete aqueduct blocks 1 laid on a gravel cushion layer 6 at the downstream end of the stilling basin of a spillway structure. The multiple stone-filled concrete aqueduct blocks 1 are spliced ​​together and arranged in the horizontal and vertical directions. There are gaps between the multiple stone-filled concrete aqueduct blocks 1, with a gap width of 2cm, and the gaps are filled with joint-filling boards 5.

[0018] The stone-filled concrete seawall block 1 includes a rectangular reinforced concrete frame 2 around the perimeter, a rubble concrete layer 3 filling the center, and multiple protruding stone blocks 4. In this embodiment, the reinforced concrete frame 2 is square.

[0019] The reinforced concrete frame 2 is a square hollow structure with sides of 400-600cm, a thickness of 50cm, and a width of 30cm.

[0020] The rubble concrete layer 3 is a structure formed by filling the reinforced concrete frame 2 with natural boulders, pebbles, and waste concrete blocks before pouring concrete. One or more of these types of boulders can be used, with no specific ratio required. Locally sourced materials can be used to fill the rubble concrete, saving costs and project investment.

[0021] Insert stones 4 are located on top of the rubble concrete layer 3. The protrusion height of insert stones 4 is 1 / 3 of their particle size. They are arranged in a quincunx pattern with a spacing of about 50cm. Insert stones 4 are made of natural boulders or pebbles with a particle size of 30-50cm. The saturated compressive strength grade of insert stones 4 is not less than MU30. The quincunx arrangement of the protruding insert stones 4 increases the friction with the water flow, which helps to eliminate residual energy, adjust the flow velocity distribution, and allow the water flow to spread evenly out of the pool, protecting the downstream riverbed from erosion.

[0022] The joint board 5 is a 2cm thick polyethylene closed-cell foam board or asphalt wood board.

[0023] The stone-filled concrete seawall block 1 is laid on the crushed stone cushion layer at the downstream end of the stilling basin of the spillway structure and the upstream section of the seawall. If the size of the stone-filled concrete seawall block 1 is too large, it is prone to cracking. If the size is too small, the stability will be poor, which will increase the project investment.

[0024] The reinforced concrete frame 2 forms a stable frame structure.

[0025] Specifically, the reinforced concrete frame 2 is a square hollow structure with sides of 400cm, a thickness of 50cm, and a width of 30cm. The insert stones 4 have a particle size of 30-50cm.

[0026] The reinforced concrete frame 2 is a square hollow structure with sides of 600cm, a thickness of 50cm, and a width of 30cm. The insert stones 4 have a particle size of 30-50cm.

[0027] The reinforced concrete frame 2 is a square hollow structure with sides of 500cm, a thickness of 50cm, and a width of 30cm. The insert stones 4 have a particle size of 30-50cm.

[0028] All other parts not described in detail are existing technology.

Claims

1. A riprap concrete seawall energy dissipation anti-impact structure comprising a plurality of riprap concrete seawall blocks (1), characterized in that: The multiple pieces of the inserted stone concrete seawall blocks (1) are spliced with each other and gaps are arranged between the blocks; The inserted stone concrete seawall blocks (1) comprise a steel reinforced concrete frame (2) around and a rubble concrete layer (3) inside; The top of the rubble concrete layer (3) is provided with multiple protruding inserted stones (4).

2. The inserted stone concrete seawall energy dissipation and scour prevention structure according to claim 1, characterized in that: The gaps are provided with gap isolation plates (5).

3. The inserted stone concrete seawall energy dissipation and scour prevention structure according to claim 2, characterized in that: The gap isolation plates (5) are polyethylene closed-cell foam plates or asphalt wood plates.

4. The inserted stone concrete seawall energy dissipation and scour prevention structure according to claim 1, characterized in that: The rubble concrete layer (3) comprises at least one of natural block stones, pebbles and waste concrete blocks.

5. The inserted stone concrete seawall energy dissipation and scour prevention structure according to claim 1, characterized in that: The steel reinforced concrete frame (2) is a square hollow structure.

6. The inserted stone concrete seawall energy dissipation and scour prevention structure according to claim 1, characterized in that: The multiple pieces of the inserted stone concrete seawall blocks (1) are arranged in horizontal and vertical directions.

7. The inserted stone concrete seawall energy dissipation and scour prevention structure according to claim 1, characterized in that: The height of the inserted stones (4) protruding from the surface of the rubble concrete layer (3) is 1 / 3 of the particle size of the inserted stones (4), and the depth of the inserted stones (4) embedded in the rubble concrete layer (3) is 2 / 3 of the particle size of the inserted stones (4).

8. The inserted stone concrete seawall energy dissipation and scour prevention structure according to claim 1, characterized in that: The steel reinforced concrete frame (2) has a side length of 400-600 cm, a thickness of 50 cm and a width of 30 cm.

9. The inserted stone concrete seawall energy dissipation and scour prevention structure according to claim 1, characterized in that: The particle size of the inserted stones (4) is 30-50 cm.

10. The inserted stone concrete seawall energy dissipation and scour prevention structure according to claim 1, characterized in that: The multiple pieces of the inserted stones (4) are arranged in a quincunx shape with a spacing of 50 cm.

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