Construction of a surface subway tunnel for train traffic - Moscow, Russia, October 11, 2021
https://www.dreamstime.com/construction-surface-subway-tunne...

Bohlträgerverbauverfahren n (Grundb) [heute nicht nur mit Holzausfachung] Berlin method [Horizontal
timber sheeting between H-piles], Berlin wall, Berlin / type supporting system, Berlinoise system
Bohrträgerpfahl m (Grundb) [teilweise auch gerammt] / king pile [Pile installed prior to forming an excavation to provide intermediate support for the strutting system on the sides of the excavation]
Bohrträgerverbau n (Grundb) drilled soldier pile wall, king pile wall [Drilled], drilled girder (temporary) supporting system
https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd...

3.1. Retaining walls
The adopted solution for the retaining walls was a King Pile wall (Berlin) with 0,30m thickness reinforced concrete panels, temporally supported on hollow steel tubular micropiles N80 ∅139,7 × 9 mm (API 5A), internally reinforced with one ∅32mm bar. By constructive reasons, the micropiles were located inside and outside the panels, depending on its distance to the façades and neighbourhood buildings.
Due to the site neighbourhood conditions, mainly the proximity of the Lisbon Metro Tunnel, the use of ground anchors was not recommended. For this reason, during the excavation works, the retaining walls were braced, at two levels (0 and -2), by strips of the basement reinforced concrete slabs, acting as horizontal beams, integrated on a stiff frame bracing system
http://geo-bookstore.ru/files/2010-Msk_Volume-3.pdf (p. 848 ff.)

Retaining walls with a stress relieving platform
If some excavation and/or fill is needed on the retained side of the wall, there may be an advantage in constructing a stress relieving platform, attached rigidly to the wall stem some distance below the top and protruding horizontally into the retained soil (Tsagareli, 1967; St John et al, 1993). The relieving platform will reduce bending moments in the wall by (a) applying a reverse moment at platform level, due to the weight of the soil on top of it, and (b) reducing vertical stresses in the retained soil below platform level. It is straightforward to take both of these effects into account in a limit equilibrium analysis.
TSAGARELI 1967 New methods of lightweight wall construction Moscow Stroiizdat
https://www.researchgate.net/profile/William-Powrie-2/public...

Abstract
Out of numerous available methods to reduce the lateral earth pressure on the retaining structures, a retaining wall with relief shelves, though known for more than a few decades, is one of the least practiced approaches to minimize the earth pressure on a wall due to the complex behavior of such walls as well as the lack of design recommendations or the codal provisions. Moreover, the previous studies were silent on explaining the mechanics behind the working of these walls. This study focuses on static force analysis of a wall with multiple relief shelves retaining a dry cohesionless backfill using principles of mechanics and theory of bending to develop a novel closed-form solution to handle the discontinuity at the joint of the relief shelf and wall stem for the evaluation of the distribution of shear force, bending moment, and deflection of the wall at any wall section and furnish design recommendations on the optimum width of the relief shelves.
https://www.springerprofessional.de/behavior-of-rigid-retain...