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Extensible Reinforcements - Active Earth Pressure

Active earth pressure is considered in the calculation of internal stability for extensible reinforcements (Standard - straight slip surface, AASHTO - Extensible, FHWA NHI-10-024).

The program allows us to multiply the calculated earth pressure by coefficient kr/ka (according to the AASHTO standards). Recommended values are shown in the following picture.

Variation of the coefficient of horizontal stress ratio kr/ka with depth for extensible reinforcements

Literature:

AASHTO LRFD Bridge Design Specifications 2004 (SI).

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