A protection structure for underwater shore slope

Abstract

The utility model discloses a kind of protection structures of underwater bank slope, including bank slope base layer, protective layer and facing layer.The bank slope base layer is underwater bank slope original soil after dredging and finishing;The protective layer is laid on the surface of the bank slope base layer using fluid solidified soil;The facing layer is set on the surface of the protective layer, and is composed of interlocking block or mold bag concrete.The utility model has the advantages of good protection effect, convenient construction and high efficiency, strong adaptability, and is suitable for the protection engineering of various underwater bank slopes.

Description

Technical Field

[0001] This utility model relates to a protective structure for underwater bank slopes. Background Technology

[0002] As a crucial component of water conservancy, waterway, and port projects, the stability of underwater slopes directly impacts the safe operation of surrounding infrastructure and the balance of the ecological environment. Under natural conditions, underwater slopes are subjected to multiple loads over long periods, including water erosion, wave impact, tidal forces, and geological movements, making them highly susceptible to localized collapses, landslides, and scour. Statistics show that underwater slope instability in my country causes direct economic losses exceeding several billion yuan annually due to incidents such as waterway siltation and dam breaches. These incidents can also trigger secondary disasters, threatening the lives and property of residents along the riverbanks. Traditional methods for protecting underwater bank slopes include riprap revetment, submerged revetment, and concrete block revetment, but these methods have problems such as high construction difficulty, high cost, and poor adaptability. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art and provide a protective structure for underwater slopes. It has the advantages of good protective effect, convenient and efficient construction, and strong adaptability, and is suitable for various underwater slope protection projects.

[0004] The purpose of this utility model is achieved as follows: a protective structure for underwater bank slopes, comprising a bank slope base layer, a protective layer, and a facing layer; wherein, The foundation layer of the bank slope is the original soil of the underwater bank slope after dredging and repair. The protective layer is made of fluidized solidified soil laid on the surface of the bank slope foundation layer; The protective layer is disposed on the surface of the protective layer and is composed of interlocking blocks or formwork concrete.

[0005] In the above-mentioned underwater slope protection structure, the thickness of the protective layer is 20-40 cm.

[0006] In the aforementioned underwater slope protection structure, the unconfined compressive strength of the fluidized solidified soil is not less than 400 kPa, and the permeability coefficient is not greater than 1 × 10⁻⁶. -5 cm / s.

[0007] In the above-mentioned underwater slope protection structure, if the protective layer adopts interlocking blocks, high-strength cement mortar is filled between adjacent interlocking blocks.

[0008] The underwater slope protection structure of this utility model is characterized by the use of fluidized solidified soil as the underwater slope protection structure, which has the advantages of good protection effect, convenient and efficient construction, and strong adaptability. It can improve the quality of protection projects and reduce project costs, and is suitable for protection projects of various underwater slopes. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the underwater slope protection structure of this utility model. Detailed Implementation

[0010] The present invention will be further described below with reference to the accompanying drawings.

[0011] Please see Figure 1 The underwater slope protection structure of this utility model includes a slope base layer 1, a protective layer 2, and a facing layer 3; wherein, The foundation layer 1 of the bank slope is the original soil of the underwater bank slope after dredging and repair. Protective layer 2 is made of fluidized solidified soil and laid on the surface of the bank slope foundation layer 1; the thickness of protective layer 2 is 20-40cm; the unconfined compressive strength of the fluidized solidified soil is not less than 400kPa, and the permeability coefficient is not greater than 1×10⁻⁶. -5 cm / s; The protective layer 3 is set on the surface of the protective layer 2 and is composed of interlocking blocks or formwork concrete; if the protective layer 3 uses interlocking blocks, high-strength cement mortar is filled between adjacent interlocking blocks.

[0012] The underwater slope protection structure of this utility model includes the following steps during construction: Step 1: Construction Preparation The construction area was surveyed, and the construction scope was determined to be an underwater bank slope with a length of 100m and a width of 20m, a slope of 1:2.5, a water depth of 4m, and a geological condition of silty clay. Step Two: Dredging and Cleaning Underwater dredging equipment was used to remove silt and debris from the surface of the bank slope foundation layer 1, with a dredging depth of 0.5m. Monitoring with a total station and level showed that the surface of the bank slope foundation layer 1 was smooth after dredging, meeting design requirements. Step 3: Repairing the foundation layer of the bank slope The dredged bank slope foundation layer 1 was compacted using underwater vibrating equipment. The slope of the bank slope after the repair was 1:2.5, and the surface flatness error of the bank slope foundation layer 1 was 3cm. Step 4: Pouring of fluidized solidified soil The fluidized solidified soil is made by mixing solidifying agent, soil and water in a mass ratio of 100:650:700. The material has an unconfined compressive strength of 400 kPa after 28 days and a permeability coefficient of 3.5 x 10-6 cm / s.

[0013] The fluidized solidified soil material was poured onto the surface of the foundation layer 1 of the bank slope using the tremie pipe method. The bottom of the tremie pipe was 40cm above the surface of the foundation layer 1 of the bank slope, and the pouring thickness was 40cm. The pouring was done in two layers, each with a thickness of 20cm, and the time interval between the pouring of the two adjacent layers was 1.5h. Step 5: Surface Treatment Before the initial setting of the fluidized solidified soil protective layer 2, the interlocking blocks of the protective layer 3 are laid on the surface of the protective layer 2 according to the design pattern, fixed with special connectors, and high-strength cement mortar is filled between adjacent interlocking blocks. Step Six: Maintenance After the fluidized solidified soil protective layer 1 has set, it is sprayed with water for curing to keep the surface moist for 10 days.

[0014] This utility model uses fluidized solidified soil as a protective layer. Fluidized solidified soil is a new type of building material with good fluidity, high strength, and strong durability. It does not require precise hoisting and positioning and can flow underwater to fill the voids on the bank slope surface, forming a continuous and complete protective layer.

[0015] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A protective structure for an underwater bank slope, comprising a bank slope foundation layer, a protective layer, and a facing layer; characterized in that, The foundation layer of the bank slope is the original soil of the underwater bank slope after dredging and repair. The protective layer is made of fluidized solidified soil laid on the surface of the bank slope foundation layer; The protective layer is disposed on the surface of the protective layer and is composed of interlocking blocks or formwork concrete.

2. The underwater slope protection structure according to claim 1, characterized in that, The thickness of the protective layer is 20-40 cm.

3. The underwater slope protection structure according to claim 1, characterized in that, The unconfined compressive strength of the fluidized solidified soil is not less than 400 kPa, and the permeability coefficient is not greater than 1×10⁻⁶. -5 cm / s.

4. The underwater slope protection structure according to claim 1, characterized in that, If the protective layer uses interlocking blocks, high-strength cement mortar is used to fill the spaces between adjacent interlocking blocks.

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