Complex sentence: The new rail trench and associated sunken station will be constructed with up to 16m deep diaphragm walls using specially imported cranes and specialists due to the unstable, watter-logged soils and the need to avoid settlement damage to close-by buildings.
Split into simpler sentences: The new rail trench and associated sunken station will be constructed with up to 16m deep diaphragm walls using specially imported cranes and specialists. This is required due to the unstable, water-logged soils and the need to avoid settlement damage to close-by buildings.