Ciria Report 108 ((top)) Access

The report is renowned for its systematic categorization of dewatering techniques. It moves beyond a "one-size-fits-all" approach, offering detailed guidance on various methods such as wellpoint systems, deep wells, horizontal wells, and sump pumping. Critically, the report correlates these techniques with specific soil types—distinguishing between the challenges posed by coarse gravels, silts, and clays. For instance, it elucidates why wellpointing is effective in sandy soils but may be inadequate for low-permeability clays where electro-osmosis might be required. By providing clear selection criteria based on hydraulic conductivity and drawdown requirements, Report 108 empowers engineers to make data-driven decisions rather than relying on trial and error.

The report provides guidance on the of embedded retaining walls (e.g., sheet piles, diaphragm walls, secant piles) in overconsolidated stiff clays , particularly the London Clay and similar geological formations. It addresses: ciria report 108