Execution of special geotechnical works. Diaphragm walls
93.020 - Earthworks. Excavations. Foundation construction. Underground works
Reemplaza a: BS EN 1538:2000
This European Standard establishes general principles for the execution of diaphragm walls as either retaining walls or cut-off walls.
This standard covers only structures constructed in a trench excavated with a support fluid or in dry conditions, where soil is removed and replaced by concrete or slurry and with wall thickness B = 40 cm.
Diaphragm walls can be permanent or temporary structures.
The following types of structure are considered:
retaining walls: usually constructed to support the sides of an excavation in the ground. They include:
cast in situ concrete diaphragm walls;
precast concrete diaphragm walls;
reinforced slurry walls;
cut-off walls: usually constructed to prevent migration of groundwater, clear or polluted, or of other contaminants present in the ground. They include:
slurry walls (possibly with membranes or sheet piles);
plastic concrete walls.
Walls formed shallow vertical trenches (typically excavations with a ratio of depth over thickness D/ B < 5 or D < 5 m) are not covered by this standard.
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