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When installing the temporary casing of H-pile, alluvial sand goes into the casing from the casing bottom and then makes the drill bit stuck. Boring cannot be continued. How would you solve the problem?

I am doing rehabilitation of a concrete structure. The plan is to chip of the existing concrete; and to expose the existing epoxy coated rebars and leave them in place; and then to pour the new concrete. Before pouring the concrete, how do I clean the epoxy coated rebars? I understand that for...

Any one has an experience for designing crash wall (concrete) for railway? What is the reasonable assumption on the deflection of the wall?

I am reviewing a caisson wall that is typical for shoring purpose (king caisson alternate with filler caisson). Does anyone know the theory of how the filler caisson inter-lock with the king caisson? or how the caissons can act as a wall? It would be great if anyone could provide me some...

I am reviewing a caisson wall that is typical for shoring purpose (king caisson alternate with filler caisson). Does anyone know the theory of how the filler caisson inter-lock with the king caisson? or how the caissons can act as a wall? It would be great if anyone could provide me some...