软土地层隧道盾构掘进对地表沉降的影响研究  

作　　者：张振[1] 张旭 王萍[1] 施振跃 孙迪 

机构地区：[1]山东科技大学,山东泰安271000 [2]山东省交通科学研究院,济南250000 [3]华电章丘发电有限公司,济南250000

出　　处：《科技创新与应用》2024年第36期110-113,共4页Technology Innovation and Application

摘　　要：为保证隧道建设安全,以济南市某地铁隧道盾构工程为研究背景,应用理论分析结合现场监测,对软土地层隧道盾构掘进对地表沉降的影响及预控措施进行研究,结果表明,在隧道盾构掘进过程中,地表沉降整体随着时间推移逐渐增大,表明地表沉降变化量数值与盾构隧道推进时间和进度呈正相关;隧道盾构掘进过程中,同一截面地表沉降变化曲线整体沿盾构中线呈对称分布,最大沉降量靠近盾构中线;在隧道盾构掘进过程中,最大沉降量位于1-CD4附近达到了-27.96 mm;采取土层提前加固、选取合理的监测点适当加大监测频率、及时调整盾构施工参数等措施能对地表沉降进行预控。In this paper,the shield underground tunnel project in Jinan city is taken as the background for the study,and the effect of shield tunneling on surface subsidence in soft soil layer is investigated,and the results show that:In the process of shield tunneling,the surface subsidence generally increases gradually with time,indicating that the change of surface subsidence value is positively related to the tunneling time and the progress of shield tunneling.In shield tunneling,the subsidence curve of the surface with the same cross-section is symmetrically distributed along the centerline of the shield tunnel,and the maximum subsidence is near the centerline of the shield tunnel.In the shield tunnel excavation,the maximum subsidence reached-27.96 mm near 1-CD4.Adopting measures such as reinforcing the soil layer in advance,selecting reasonable monitoring points to appropriately increase the monitoring frequency,and timely adjusting the shield construction parameters can pre-control the surface settlement.

关 键 词：软土地层 隧道盾构 地表沉降 安全施工 预控 

分 类 号：U455[建筑科学—桥梁与隧道工程]