BS EN ISO 18674-5:2019

This standard BS EN ISO 18674-5:2019 Geotechnical investigation and testing. Geotechnical monitoring by field instrumentation is classified in these ICS categories:

• 13.080.20 Physical properties of soils
• 93.020 Earthworks. Excavations. Foundation construction. Underground works

This document specifies the measurement of stress changes by means of total pressure cells (TPC). General rules of performance monitoring of the ground, of structures interacting with the ground, of geotechnical fills and of geotechnical works are presented in ISO 18674-1.

If applied in conjunction with ISO 18674-4, this document allows the determination of effective stress acting in the ground.

This document is applicable to:

• monitoring changes of the state of stress in the ground and in geo-engineered structures (e.g. in earth fill dams or tunnel lining);

• monitoring contact pressures at the interface between two media (e.g. earth pressure on retaining wall; contact pressure at the base of a foundation);

• checking geotechnical designs and adjustment of construction in connection with the Observational Design procedure;

• evaluating stability during or after construction.

• Guidelines for the application of TPC in geotechnical engineering are presented in Annex B.