中山广场站暗挖隧道地表沉降监测及分析

Monitoring and analysis of surface subsidence of underground excavation tunnel at Zhongshan square station

隧道的开挖不可避免地会对周边地表造成扰动产生地表沉降,而周边地表的稳定性又是隧道开挖能否顺利进行的关键问题之一。为探讨中山广场站暗挖隧道周围的地表的稳定性状况,依据施工设计、工程地质及相关规范要求,设计并制定了地表测量监控方案,确定了监测点的埋设与监测预警控制值。通过分析监测结果数据揭示了地表沉降现象产生的原因及发展趋势,并以此确定暗挖隧道周边地表的稳定性。分析结果表明,该暗挖隧道周边地表稳定性良好。

The excavation of the tunnel will inevitably cause disturbance to the surrounding surface,and the stability of the surface is one of the key problems for the smooth excavation of the tunnel.In order to explore the stability of the surface around the underground excavation tunnel of Zhongshan square station,according to the construction design,engineering geological situation and relevant specifications and requirements,the embedding and monitoring and early warning control value of the monitoring point was designed and formulated.The analysis and monitoring data reveal the causes and development trends and determine the stability of the surface around the tunnel.The analysis results show that the surface around the dark excavation tunnel is very stable.