China’s construction projects are gradually switching traditional construction technology with more environmentally friendly methods. These photos shows an excavation site that uses combination wall and bored cast-in-place pile row side by side. A strong visual impact!

Casing and sheet pile interlocked walls are a circular earth retaining wall, that has a low enviromental impact. In contrast, the bored cast-in-place pile retaining wall is a permanent structure that  will produce a large amount of waste soil and slurry that needs to be transported and discharged. The advantages of the combi wall construction method are clear at a first glance.