Standards Development

Scope

This document establishes general principles for the execution of soil treatment by deep vibration.

The following types of treatment are covered by this European Standard:

- deep vibratory compaction to densify the soils;

- vibrated columns formed by inserted granular material laterally/radially compacted against the surrounding soils to form a stiff composite column-soil structure (vibrated compacted granular columns);

- vibrated columns formed by inserted material developing unconfined compressive strength comprising a composite of binder and granular material (rigid columns).

The following treatment methods are covered by this European Standard:

- methods in which depth vibrators, containing oscillating weights which cause horizontal vibrations, are inserted into the soil;

- methods in which compaction probes are inserted into the soil using a vibrator which remains at the ground surface and which oscillates in a vertical mode.

Treatment methods are outlined in Annexes A and B.

The following treatment methods, among others, are not included in this European Standard:

- 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.

Purpose

This standard needs to be revised to be in line with the new development of Eurocode 7 on Geotechnical work, and to cover the evolution of the technology.