Changsha Metro Line 3 of Lingguandu Station to Houjiatang Station is under the cross-over stereoscopic crossing in the subway line 1. Based on the description of shield tunneling parameters, characteristics and methods of wireless monitoring, monitoring sections and monitoring points arrangement, automatic monitoring and wireless transmission technology are used to monitor deformation of the shield segment and lateral settlement difference of track plate of Changsha Metro Line 1 in operation, and then get the feedback analysis from monitoring data. The research shows that, when the soil pressure in shield tunneling is controlled from 1. 0 bar to 1. 3 bar and the grouting pressure is controlled from 3. 0 bar to 3. 6 bar, the convergence deformation of each monitoring section and the horizontal uneven settlement of orbital plate are within 0. 5 mm, which are both within the allowable range of the Technical Specification for Safety Protection of Urban Rail Transit. It is proved that the existing tunnel structure is safe and reliable.%以长沙市轨道交通3号线灵官渡站至侯家塘站盾构区间近距离立体交叉下穿运营中的地铁1号线为工程背景,对无线监测技术及其相应的反馈分析进行了研究.研究中对盾构掘进参数、无线监测特点及方法、监测断面及监测点布设等阐述的基础上,采用自动监测、无线传输技术对运营中的长沙地铁1号线盾构管片的变形、轨道板横向沉降差进行实时监测,并对监测数据进行反馈分析.通过研究得到盾构掘进中土仓压力控制在1. 0 ～ 1. 3 bar、注浆压力控制在3. 0 ～ 3. 6 bar时,各监测断面的收敛变形及轨道板的横向不均匀沉降均在0. 5 mm 以内,远小于《城市轨道交通结构安全保护技术规范》规定的预警值,说明在该盾构掘进参数控制下运营中的地铁1号线区间隧道处于安全状态.
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