In urban environment, most buildings are adjacent to each other. High rise buildings need deep excavation. The excavation will cause large soil movement and may cause damage to the adjacent building. For this reason, this research studies the effect of nearby excavation on existing pile group and piles supporting excavation numerically. This research investigates the behavior of piles supporting excavation and a triple-row of capped head piles located nearby an excavation. Response of piles in sand due to excavation-induced lateral soil movements is studied by using PLAXIS 2D finite element software version 8.2. A parametric study was performed to study the effect of adding strut to the pile supporting excavation and effect of pile supporting excavation length.