Scour-preventing groove for chain precast block protective surface

Abstract

The invention discloses a scour-preventing groove for a chain precast block protective surface. The scour-preventing groove for the chain precast block protective surface comprises the chain precast block protective surface, a riprap layer and an apron groove bottom extension section. The apron groove bottom extension section is located on the bottom layer. The apron groove bottom extension section and a riverbed surface connected with the apron groove bottom extension section are filled with the riprap layer. The chain precast block protective surface is arranged on the riprap layer and comprises precast blocks, chain ropes, anchoring piers, anchoring beams and anchoring heads. The precast blocks include the A type precast blocks and the B type precast blocks. Through chain holes are only formed in the centers, in the water flowing direction, of the B type precast blocks. Through chain holes are formed both in the centers, in the water flowing direction and the centers, in the direction perpendicular to the water flowing direction, of the A type precast blocks. The chain ropes penetrate into the chain holes to be connected with the precast holes in series. One upstream end of each chain rope arranged in the water flowing direction is anchored in the corresponding anchoring pier, and one downstream end of each chain rope arranged in the water flowing direction is anchored in the corresponding anchoring beam. The two ends of each chain rope arranged in the direction perpendicular to the water flowing direction are anchored in the corresponding anchoring heads. The scour-preventing groove for the chain precast block protective surface is high in deformation adaptability, high in water permeability, high in roughness, environmentally friendly, economical, high in durability and wide in application range.

Description

technical field [0001] The invention relates to an anti-scour trough in water conservancy projects, in particular to an anti-scour trough for interlocking prefabricated block surface protection in a riverbed pivot project. Background technique [0002] The riverbed-type pivot project built on the overburden foundation has high requirements for energy dissipation and anti-scouring due to the large discharge flow. Energy dissipation and anti-scour facilities are key parts of engineering structure safety, which is related to the operation safety of the pivot project. The anti-scour trough structure As the transitional structure between the bottom protection or sea diffuse and the original riverbed, it should have certain flexibility, water permeability and surface roughness. [0003] The anti-scour grooves on the covering layer foundation can be divided into two types according to the structure type: riprap anti-scour grooves and tooth wall type anti-scour grooves. Among them, ...

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Problems solved by technology

[0004] Chinese patent CN203782664U discloses an anti-scour structure for a sandy soil foundation sluice. A steel sheet pile intercepting wall is arranged upstream of the riprap anti-scour trough, which combines the characteristics of the riprap anti-scour trough and the tooth wall anti-scour trough. Reducing the osmotic pressure can also enhance the anti-shock ability. However, the cost of steel sheet piles is high and the economy is poor. If the foundation is dense gravel and pebbles, there will be difficulties in the construction of steel sheet piles.

[0006] The prefabricated concrete block anti-scour row adopts the prefabricated concrete blocks with staggered edges to overlap up and down, and the surface is flat. It is better for clay or silt soil riverbeds, but on sandy soil foundations, due to the strong water permeability of the foundation, spliced ​​precast Poor block integrity and water permeability, easy to be damaged by penetration

[0007] The alloy steel mesh bag is made of alloy steel wire material, filled with rocks, closed and bound to form a bag shape, as the anti-scourrence layer on the surface of the scour-proof groove, it has the advantages of strong water permeability, strong ability to adapt to deformation, and high surface roughness, but due to The required amount of alloy steel wire mesh bag steel wire is large, and the cost is high; in addition, the diameter of the alloy steel wire is relatively small, and it is easy to break the wire during the binding and hoisting process. poor durability

[0008] Renault pad is a rectangular cage structure with stones or pebbles inside. The cage material is made of aluminum-zinc alloy steel wire and other materials. The cages are bound with steel wires of the same material, which has certain flexibility, water permeability and surface roughness. , the disadvantages are similar to those of alloy steel net bags. On the one hand, the cost is higher;

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