摘要
顶管法作为一种非开挖技术,近年来在沿海发达城市管线敷设施工中得到广泛应用,但顶管施工中产生的施工应力和地层损失会导致地表变形。基于修正的Sagaseta公式,结合工程实例对地表横向、纵向沉降进行计算,分析了施工中顶管埋深、管线管径、纠偏角度对地表变形的影响规律;同时探讨了在实际施工时减小环境危害的施工控制措施。
As a trenchless technology,pipe jacking has been widely used in pipeline construction in coastal areas recent years,but it may produce ground deformation during pipe jacking due to construction stress and soil loss.So based on the modified Sagaseta＇s formula,the ground horizontal and vertical settlement of a project is calculated.And the affecting factors for ground deformation,such as depth of pipe,pipe diameter and angle correction are analyzed.In addition,discuss is made on the control methods for reduce environmental hazards during construction.
关键词
顶管
地表变形
影响因素
控制措施
pipe jacking
ground deformation
affecting factors
control methods
