Why are steel sheet piles called Larsen piles?
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Because it was invented by Larson. This Larsen’s full name is Tryggve Larssen, a local from Bremen. There are two accounts regarding the year in which he invented Larssen sheet piling; Wikipedia states it was 1906, while another claim is that the term \"Larssen sheet piling\" already existed in 1902. Larson’s innovations are two-fold: one is giving the sheet piles a wave-shaped (U-shaped) cross-section, and the other is the locking mechanism. Early Larson sheet piles had locks on only one side; those with locks on both sides appeared later.
I see, so that’s how it is. I’ve learned it now.
I learned something new. Question: 1. In Figure 2, what is the purpose of the rebar used in welding the steel sheet piles? 2. What is the purpose of the black rubber rollers on the rear side of the steel sheet piles in Figure 3?
Figure 2 serves as a retaining structure, and such structures are commonly seen in foundation pits. Figure 3 is an image from abroad; as for those rollers, I really have no idea what they are