Optimum Design of Two Anchored Steel Sheet Pile System

Abstract

Deep excavation problems are frequently encountered today. In case of construction works requiring deep excavation, a retaining system should be used to prevent damage to existing buildings around the excavation area. Steel sheet pile walls which are one of the retaining systems used for this purpose, are relatively preferred due to their resistance to high driving stresses, lightweight, long service life and the ability to use them repeatedly compared to other types of wall. One of the tasks of a geotechnical engineering who will design the required retaining structure is to create a safe and economical design. Although there are enough studies in the literature about the design of anchored pile systems, optimization studies are insufficient. For this reason, in this study, an optimization calculation has been made on cost of sheet pile system by changing lateral and vertical spacing of anchors and angles of anchor in sheet pile system which is driven into medium dense sand soil. As a result, 11296 different geometry conditions have been examined and cost functions have been established for each. Finally it has been observed that the lowest costs usually occur when the angle of anchor is 150 and horizontal distance between the anchors is 3 m.

Keywords

• anchored sheet pile walls
• optimization
• retaining structures
• deep excavation