Looking up...
Construction work involving the laying of a building's foundation, including excavation, formwork, and concrete pouring.
地盤が弱いので、基礎工事は慎重に行う必要があります。
Since the ground is weak, the foundation work needs to be done carefully.
基礎工事が完了したら、次の段階の工事に進みます。
After the foundation work is completed, we will move on to the next construction phase.
基礎工事 is a literal compound term; it does not have idiomatic meanings in Japanese. The term is specific to construction and civil engineering.
Think of 基礎工事 as 'foundation construction' (基礎 = foundation, 工事 = construction). The term is straightforward and literal, so breaking it down into its components can help remember its meaning.
基礎 (kiso) means 'foundation' and 工事 (kōji) means 'construction work' or 'construction'. The compound term combines these two words to describe the specific phase of construction involving the foundation.
This term is commonly used in architectural and construction contexts. It refers to the physical process of creating a building's foundation, not metaphorical or abstract uses.