土压平衡盾构近距离下穿既有运营铁路隧道沉降控制关键技术

KEY TECHNOLOGIES FOR SETTLEMENT CONTROL OF EPB SHIELD TUNNELING THROUGH EXISTING RAILWAY TUNNELS IN SHORT DISTANCE

以南宁地铁4号线那历村站至那洪立交站区间下穿南环槎路隧道为例,面临南环槎路隧道下沉、变形导致原有隧道结构开裂等风险,通过对既有线路隧道实时监测,严控施工技术参数,构建了基于监测数据的盾构掘进参数体系控制方法,成功确保既有运营铁路隧道的安全。

Taking the South Huancha road tunnel under the section from Nalicun station to Nahong interchange station of Nanning Metro Line 4 as an example,facing the risks of the original tunnel structure cracking caused by the subsidence and deformation of the South Huancha road tunnel,the paper constructs the shield tunneling parameter system control method based on the monitoring data by strictly controlling the construction technical parameters based on real-time monitoring of the existing line tunnel,successfully ensuring the safety of existing operating railway tunnels.