CEN/TC 288/WG 23 - Ground treatment

This document establishes general principles for the execution of soil treatment by deep vibration.
The following types of treatment are covered by this document:
-   deep vibratory compaction to densify the ground as mentioned in EN 1997 3:2025, Annex I, Table I.1;
-   vibrated columns formed by inserted granular material laterally/radially compacted against the surrounding ground to form a stiff composite column-soil structure (vibrated compacted granular columns) as mentioned in EN 1997 3:2025, Annex I, Table I.2;
-   vibrated columns formed by inserted material developing unconfined compressive strength comprising a composite of binder and granular material (rigid columns) as mentioned in EN 1997 3:2025, Annex I, Table I.2.
The following treatment methods are covered by this document:
-   methods in which depth vibrators, containing oscillating weights which cause horizontal vibrations, are inserted into the ground;
-   methods in which compaction probes are inserted into the ground using a vibrator, which remains above ground surface, and which oscillates in a vertical mode.
Treatment methods are outlined in Annexes A, B, C and D.
The following treatment methods, among others, are not included in this document:
-   dynamic compaction, dynamic replacement and other methods in which some form of treatment is applied to the ground surface;
-   uncompacted granular columns primarily used as drains;
-   explosive compaction.