摘要
为避开地下障碍物,顶管隧道被迫设计为曲线.无超挖刀的曲线顶管施工对土体产生的扰动的机理较直线顶管更为复杂,其沉降规律尚未明确.为此,以宁波市潘桥电力隧道工程为研究对象,采用数值模拟的方法,对顶管在空间曲线段施工产生的沉降规律进行分析.结果表明:无超挖刀参与的曲线顶管施工,产生的地表横向沉降最大值偏移至曲线外侧;对土体纵向变形扰动影响最大的区域为距离顶管机2.5倍洞径内.
To avoid underground obstacles,the pipe jacking tunnel was forced to be designed as a curve.The mechanism of soil disturbance caused by curved pipe jacking without super excavator is more complicated than that of straight pipe jacking,and its settlement law is not yet clear.Therefore,taking the Panqiao Electric Power Tunnel Project in Ningbo as the research object,the settlement law caused by the construction of the pipe jacking in the space of the curve section was analyzed using the method of numerical simulation.The results show that the curve pipe jacking construction without the participation of the super excavator will cause the maximum lateral settlement of the surface to shift to the outside of the curve;the area with the greatest influence on the longitudinal deformation disturbance of the soil is within the hole diameter 2.5 times from the pipe jacking machine.
作者
许有俊
孟毅欣
张朝
韩志强
郭飞
高胜雷
XU Youjun;MENG Yixin;ZHANG Chao;HAN Zhiqiang;GUO Fei;GAO Shenglei(Civil Engineering School,Inner Mongolia University of Science and Technology,Baotou 014010,China;Academician Workstation of Mine Safety and Underground Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China;Engineering Research Center of Urban Underground Engineering at Universities of Inner Mongolia Autonomous Region,Inner Mongolia University of Science and Technology,Baotou 014010,China;Beijing Municipal Construction Group Co.,Ltd.,Beijing 100079)
出处
《内蒙古科技大学学报》
CAS
2023年第1期81-86,共6页
Journal of Inner Mongolia University of Science and Technology
基金
国家自然科学基金资助项目(51868062)
北京高新市政工程科技有限公司横向课题(2020012).
关键词
曲线顶管
数值模拟
土体扰动
地表沉降
curved pipe jacking
numerical simulation
soil disturbance
surface settlement
