The Chemical Evolution and Corrosivity of the Groundwater along the Shanxi Section of a Railway Line
Corrosion affects the durability and reliability of reinforced concrete structures.Taking the Shanxi section of a railway under construction as an example,this paper,through the sampling and detection of groundwater along the line,analyzes the evolution of the main corrosion factors along this line with the method of point-surface combination.The results indicate that,influenced by climate and geological environment,the chemical concentration of groundwater along the railway line changes from low to high,and that the content of SO42-and Cl-shows obvious zoning and banding characteristics.Groundwater has sulfate and chloride corrosion on concrete structures and steel bars,and the corrosiveness from mountainou areas to piedmont alluvial plains and then to downstream alluvial plains shows a horizontal trend or starting from scratch,progressing gradually,and eventually becoming strong.Human activities can exacerbate local erosive changes.On this basis,in addition to formulating targeted anti-corrosion measures from the perspective of improving concrete density and impermeability,it is also essential to enhance the monitoring of corrosion signals of reinforced concrete and the measurement of the compressive strength of concrete structures during the operation period,in order to improve the construction quality of railway centennial project.
groundwaterchemical evolution of groundwatercorrosivityreinforced concreterailway engineering
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