铁道科学与工程学报Issue(4)：73-79,7.
盾构隧道施工对既有建筑物基桩影响的数值模拟
Nu merical simulation of shield tunnel construction on the impact of neighboring piles foundation
摘要
Abstract
As for the common shield excavation technique in subway,the influence of shield excavation on piles foundation was estimated with the simulation calculation for construction process by taking into account the disturb-ance of the excavation face,the pressure of soil chamber,the friction and grouting layer between the shield and the soil.The results indicate that the affecting area of surface subsidence caused by shield excavation is approximately from 20m in front of foundation piles to 25m behind the excavation face in the direction of tunnel axis.The pile ad-ditional axial force induced by the shield excavation increases with the increase of buried depth and reaches the maximum in the depth of the tunnel.However,the moment of pile increases because of the shield excavation, which grows continually with the reduced distance between excavation face and pile.The moment perpendicular to the tunnel axis direction approaches to the maximum value when excavating to the pile position.关键词
地铁隧道/盾构/数值分析/地表沉降/桩基/轴力/弯矩Key words
subway tunnel/shield/numerical analysis/ground subsidence/pile foundation/axial force/ben-ding moment分类
建筑与水利引用本文复制引用
王净伟,杨信之,阮波..盾构隧道施工对既有建筑物基桩影响的数值模拟[J].铁道科学与工程学报,2014,(4):73-79,7.基金项目
国家自然科学基金资助项目 （）
