<强>锚锚碇是横向支撑结构的隔板（壁或）。 Bulkheads are most commonly made of steel, concrete, or wood sheet pile. Sheet piles are long flat sections of construction material that interlock longitudinally but are set vertically to form a thin wall. Marine bulkheads retain landside soils along their back face, and serve as a shield against erosion from water action along their front face. Bulkheads known as "fill bulkheads" can also be completely constructed on land. These may separate one type of soil or work site from an adjacent one, often at different elevations, or brace one side of an excavation, to provide soil slope stability. The bottom edge of a bulkhead’s sheet piles are sunk or driven into the underlying soil.
当场地限制不允许更便宜和更传统的开挖方法，构建的地下连续墙提供了表面高度低于地方浇注混凝土的替代方法。地下连续墙，用于地下室墙体的施工和其他地面以下基础元素，不需要模板及开挖面支撑。 Instead, a thin trench is dug into the site soils which exactly matches the thickness and depth of the new below grade wall.