摘要
在小半径曲线隧道的施工中,由于土体与盾构机之间的相互作用更复杂,盾构转弯半径内侧土体容易发生超挖情况,导致地表沉降难以控制。针对小半径曲线隧道盾构施工引起的地表沉降问题,以实际的工程地质条件与施工参数进行三维建模,通过MIDAS/GTS软件模拟小半径隧道盾构施工工况,研究了不同曲率半径、地层损失率、隧道覆土厚度、隧道盾构施工参数等变量因素下小半径曲线隧道盾构施工对地表沉降的影响规律。结合合肥当地工程背景条件,分析不同开挖阶段下施工所造成的地表沉降,可为小半径曲线隧道盾构施工提供控制地表沉降的措施。
In the construction of small radius curve tunnels,due to the more complex interaction between the soil and the shield machine,the soil inside the shield machine is prone to over-excavation,which makes the surface settlement difficult to control.In this paper,aiming at the problem of surface settlement caused by shield construction of small radius curve tunnel,three-dimensional modeling is carried out with actual engineering geological conditions and construction parameters.The construction conditions of small radius tunnel shield are simulated by MIDAS/GTS software,and the influence of shield construction of small radius curve tunnel on surface settlement under different subjective and objective variables such as radius of curvature,ground loss rate,tunnel overburden thickness and tunnel shield construction parameters is studied.The surface settlement caused by different excavation stages is analyzed,and combined with the background conditions of this project in Hefei area,the measures to control the surface settlement are provided for the shield construction of small radius curve tunnel.
作者
席培胜
张军
陈磊杰
XI Peisheng;ZHANG Jun;CHEN Leijie(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China;Ningbo Rail Transit Group Co.,Ltd.,Ningbo 315000,China)
出处
《陕西理工大学学报（自然科学版）》
2023年第5期47-54,共8页
Journal of Shaanxi University of Technology:Natural Science Edition
关键词
小半径曲线隧道
盾构施工
地表沉降
沉降控制
small radius curve tunnel
shield construction
surface settlement
settlement control
