A résfal csonkokat egyszerűen diaphragm wall panelekenek v. sectionoknak hívják. A harapáskiosztás a primary és secondary panelek egymást váltó sora.
A technológia leírása az alábbi weblapokon található, (van több is, de ezek elég értelmesek) és a frézeres technológia az erre a célra használt Hydrofraiser nevű speciális masina nevéből ered.

Diaphragm wall construction begins with the trench being excavated in discontinuous sections or "panels". Stop-end pipes are placed vertically at each end of the primary panel to form joints for adjacent secondary panels. Panels are usually 8 to 20 feet long, with widths varying from 2 to 5 feet...
Once the excavation of a panel is complete, a steel reinforcement cage is placed in the center of the panel. Concrete is poured in one continuous operation through one or more tremie pipes that extend to the bottom of the trench...
The slurry that is displaced by the concrete is saved and reused for subsequent panel excavations. As the concrete sets, the end pipes are withdrawn. Similarly, secondary panels are constructed between the primary panels to create a continuous wall.

http://www.diaphragmwall.com/diaphragm-walls-technology/diap...

The Hydrofraise is a drilling machine powered by three down-the-hole motors with reverse mud circulation. During operation , the Hydrofraise has a heavy metal frame which serves as a guide. The frame has two cutter drums equipped with tungsten carbide-tipped cutters which rotate in opposite directions in order to break up the soils.
A pump placed immediatly above the drums evacuates the loosened soil which is carried to the surface by the drilling mud. The mud is continuously filtered to remove the suspended cuttings and then poured back into the trench.
A special feature of the Hydrofraise is that the cutting tool is capable of penetrating the concrete of a panel that has already set, to a thickness of several centimeters. Itis therefore possible to achieve good joints without using stop-ends when carrying out the construction of alternate panels. Another important advantage is that the drilling mud is constantly screened and desanded during excavation, thereby permitting reinforcement to be placed and concreting to be carried out as soon as the required depth has been reached .
http://www.duchemin.org/jj/stage/HYDRO2.HTM
The design of the Hydrofraise excavation system makes it possible to drill barrettes or diaphragm-wall elements in a very wide range of soils, from cohesionless soils (silt, sand, gravel and cobbles up to 10 cm) to hard rock (50 to 100 MPa crushing strength). A major advantage of the hydrofraise is that it eliminates the need for chiseling. This combined with the absence of vibration and shock makes the system very suitable for use on urban sites. http://www.duchemin.org/jj/stage/HYDRO1.HTM