Which statement accurately describes grout placement as standard practice?

• A. It is standard practice to pour grout from the top down from the surface
• B. It is standard practice to pump grout into the annular space from the bottom up using a tremie pipe
• C. It is performed by filling grout from the side
• D. It is not used in wells

Answer: (B)

Placing grout in wells is done from the bottom up to create a continuous fill that displaces water and minimizes voids. Using a tremie pipe lets the grout be positioned beneath the water surface, so as it’s pumped, it forms a solid, bottom-to-top column that stays in place and prevents washout or segregation. This bottom-up method ensures the deepest portions of the annular space are filled first and that the grout bonds effectively to the borehole walls, producing a reliable seal. Pouring from the top or filling from the side can trap water, create channels, or leave gaps, which is why those approaches aren’t standard practice. Grouting is indeed used in wells to achieve a proper seal and stabilization.