What are steel sheet piles?
Steel sheet piles, also known as box-shaped steel sheet piles and steel sheet extrusion piles, are a basic construction material with simple manufacturing process, convenient installation and light structure. The length of the steel sheet pile can be combined according to the actual situation on site. The usual length is 8-12 meters, and there are also longer or shorter steel sheet piles.
Common causes of corrosion of steel sheet piles:
1. Physical factors: seawater, rainwater and steam, etc.
2. Chemical factors: chemical corrosion of various acids, alkalis and salts
3. Biological factors: such as seaweed, bacteria, marine life, etc.
Reasons for corrosion of steel sheet piles in the soil:
The main reasons for corrosion of steel sheet piles in the soil are as follows:
1. Soil acidity and alkalinity lead to corrosion: some substances in the soil will decompose into acidic or alkaline substances, leading to corrosion of steel sheet piles.
2. High soil humidity leads to corrosion: In moist soil, oxygen, water and iron (steel) produce chemical reactions, which promote the corrosion of steel sheet piles.
3. Electrochemical corrosion: The electrolyte in the soil and the oxygen content in the small pores are inconsistent, causing anode and cathode areas to appear locally in the steel sheet pile, thus causing local corrosion.
Effects of steel sheet pile corrosion in soil:
Steel sheet pile corrosion in soil will have a great impact on the project, mainly in the following aspects:
1. Shorten the service life: Corrosion will cause the thickness of the steel sheet pile wall to decrease, reducing its bearing capacity and service life.
2. Reduce the quality of the project: The surface of the corroded steel sheet pile is uneven, causing the rubber gasket at the joint to lose elasticity, resulting in leakage, cement slurry leakage and other problems, thereby reducing the quality of the project.
3. Endanger construction safety: After corrosion, the strength and rigidity of the steel sheet pile are greatly reduced. Once subjected to external forces, serious safety accidents may occur.
4. Increase maintenance costs: Corrosion requires frequent maintenance and replacement of steel sheet piles, increasing maintenance costs.
How to solve the problem of steel sheet pile corrosion in soil?
1. Anti-corrosion coating: Applying a layer of anti-corrosion coating on the surface of the steel sheet pile can effectively slow down the corrosion rate of the steel sheet pile and play a protective role.
2. Perlite filling: Filling perlite and other materials with good chemical stability around the steel sheet pile can slow down soil erosion and corrosion.
3. Energy-saving and environmentally friendly AC cathodic protection method: By attaching electrodes to the surface of steel sheet piles, the steel sheet piles are used as negative electrodes, and the current flows from the anode to the cathode, dispersing the current throughout the structure, thereby slowing down the local corrosion rate and achieving the protection effect.
Summary:
The corrosion of steel sheet piles in the soil is an issue that needs to be taken seriously. If measures are not taken in time, it will seriously affect the quality and safety of the project. Through effective anti-corrosion measures, the service life of steel sheet piles can be extended, while ensuring the quality of engineering construction.
Steel sheet piles, also known as box-shaped steel sheet piles and steel sheet extrusion piles, are a basic construction material with simple manufacturing process, convenient installation and light structure. The length of the steel sheet pile can be combined according to the actual situation on site. The usual length is 8-12 meters, and there are also longer or shorter steel sheet piles.
Common causes of corrosion of steel sheet piles:
1. Physical factors: seawater, rainwater and steam, etc.
2. Chemical factors: chemical corrosion of various acids, alkalis and salts
3. Biological factors: such as seaweed, bacteria, marine life, etc.
Reasons for corrosion of steel sheet piles in the soil:
The main reasons for corrosion of steel sheet piles in the soil are as follows:
1. Soil acidity and alkalinity lead to corrosion: some substances in the soil will decompose into acidic or alkaline substances, leading to corrosion of steel sheet piles.
2. High soil humidity leads to corrosion: In moist soil, oxygen, water and iron (steel) produce chemical reactions, which promote the corrosion of steel sheet piles.
3. Electrochemical corrosion: The electrolyte in the soil and the oxygen content in the small pores are inconsistent, causing anode and cathode areas to appear locally in the steel sheet pile, thus causing local corrosion.
Effects of steel sheet pile corrosion in soil:
Steel sheet pile corrosion in soil will have a great impact on the project, mainly in the following aspects:
1. Shorten the service life: Corrosion will cause the thickness of the steel sheet pile wall to decrease, reducing its bearing capacity and service life.
2. Reduce the quality of the project: The surface of the corroded steel sheet pile is uneven, causing the rubber gasket at the joint to lose elasticity, resulting in leakage, cement slurry leakage and other problems, thereby reducing the quality of the project.
3. Endanger construction safety: After corrosion, the strength and rigidity of the steel sheet pile are greatly reduced. Once subjected to external forces, serious safety accidents may occur.
4. Increase maintenance costs: Corrosion requires frequent maintenance and replacement of steel sheet piles, increasing maintenance costs.
How to solve the problem of steel sheet pile corrosion in soil?
1. Anti-corrosion coating: Applying a layer of anti-corrosion coating on the surface of the steel sheet pile can effectively slow down the corrosion rate of the steel sheet pile and play a protective role.
2. Perlite filling: Filling perlite and other materials with good chemical stability around the steel sheet pile can slow down soil erosion and corrosion.
3. Energy-saving and environmentally friendly AC cathodic protection method: By attaching electrodes to the surface of steel sheet piles, the steel sheet piles are used as negative electrodes, and the current flows from the anode to the cathode, dispersing the current throughout the structure, thereby slowing down the local corrosion rate and achieving the protection effect.
Summary:
The corrosion of steel sheet piles in the soil is an issue that needs to be taken seriously. If measures are not taken in time, it will seriously affect the quality and safety of the project. Through effective anti-corrosion measures, the service life of steel sheet piles can be extended, while ensuring the quality of engineering construction.
