Retaining wall refers to the structure that supports subgrade fill or hillside soil to prevent deformation and instability of fill or soil, so it plays a great role:
Setting shoulder wall or dike wall under high-fill embankment or steep-slope embankment can prevent subgrade slope or basement from sliding, ensure the stability of subgrade, shrink the foot of fill slope, reduce the amount of fill, reduce the demolition area and protect the existing buildings near the line.
Setting retaining walls on river banks and reservoir dikes can prevent water from scouring and eroding subgrade, and is also an effective measure to reduce riverbed compression or occupy less storage capacity.
Setting retaining wall at tunnel entrance or open-cut entrance can shorten the length of tunnel or open-cut entrance and reduce the project cost.
Retaining walls are set at both ends of the bridge as wing walls or abutments to protect the abutments and connect the embankments.
Anti-slide retaining wall can be used to prevent landslides.