Bohrbrunnenpfeiler m ● drilled caisson, drilled pier [ It is made by driving a heavy steel pipe with a cutting shoe down to bedrock and as far into the rock as it will go. In this respect the caisson is a pile. After refusal, the soil encased in the pipe is removed, a hole is drilled through the decomposed top layer into sound rock by means of a churn drill, and the hole and the pipe are filled with concrete. These procedures are characteristic for piers] ...
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- Bohrbrunnenpfeiler m
- Springer Berlin Heidelberg