Combined wall systems, often called combi-walls for short, are often
employed when regular sheet piles are not strong enough to support the required
load. Every combi-wall system has three main components: king pile, sheet piles
and the connector (which is welded with the king pile and connects the king pile to
the sheet pile). These walls can be temporary or permanent, and they’re a good
alternative to traditional retaining wall structures such as secants or sheet pile
walls