InLine has provided design drawings and specifications for all types of retaining walls. Some of the more common types of retaining walls are discussed below:
· Cantilever Type Walls are common for wall heights of 10 feet or less and are commonly used for grade separations. These have a spread footing and the stem portion of the wall are normally made from reinforced concrete or block.
· Engineered Systems such as Keystone Brand are often selected for aesthetics and economy. With the installation of geo-grid mesh and proper grading techniques, these walls are commonly used for wall heights exceeding 20 feet. These types may not be appropriate when wall deflections or soil movement behind the wall can not be tolerated.
· Pier Walls are similar to the cantilever type but piers are used to support the stem. This type of wall is common on hill sides since a cantilever wall would require extensive excavation. The stems are normally made from reinforced concrete or block. For large walls, pre-cast concrete panels can be used for the stems.
· Tie-Back Walls are common for wall used to resist land slides and with high earth pressures. These utilize steel or concrete soldier piles that extend into bedrock that is below the slide plane. The portion of soldier above the slide plane is anchored into the hill side with tie backs. The tie-backs consist of reinforcing steel with concrete encasement and extend into the hill a sufficient distance to provide anchorage. Tie-back lengths are dependant on site soil conditions and typical lengths range from 20-60 feet.
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