GGU-RETAIN: Base heave safety

Safety against base heave (see EAB R 10; Paragraph 1) is demonstrated using a bearing capacity failure analysis after Weißenbach (Baugruben III, 1977), which compares weight forces (including area loads, berms etc.) with the bearing capacity load, whereby a total of 50 vertical failure planes are investigated. The first failure plane is 0.2 times the excavation depth behind the retaining wall, the last failure plane is 5.0 times the excavation depth behind the retaining wall. For soldier pile walls, the bottom edge of the failure plane is the excavation bottom, while for sheet pile and in-situ concrete walls it is the base of the section.

Analysis of the safety against base heave of heavy foundations in the vicinity of excavations (see EAB R 10, Paragraph 2) is not performed.