考虑建筑既有变形的盾构穿越扰动控制标准

Undercrossing Disturbance Control Criterion for Shield Tunnel With Consideration of Building Existing Deformation

摘要:

市区软土地层中进行隧道施工引起的地层沉降会影响地面既有建筑的安全.提出考虑建筑既有变形的盾构穿越扰动双控控制标准.结合上海市轨道交通11号线下穿越保护建筑徐汇中学崇思楼工程,对穿越前崇思楼进行检测,对崇思楼既有沉降进行分析,评估崇思楼穿越前状态.制定考虑建筑既有变形的盾构穿越崇思楼允许变形控制指标.对穿越进行全程监测,验证所提出控制指标的合理性.

关键词:盾构; 穿越; 扰动; 建筑既有变形; 双控控制标准

Abstract:

Ground movements caused by the tunnel construction in soft ground endanger the safety of the existing building.Double control criterion was proposed for shield tunnel undercrossing by taking the existing deformation of building into consideration.For Shanghai Metro Line 11 undercrossed the Chongsi Building,Xuhui Middle School,the deformation of Chongsi Building was detected and analyzed,and the status of the building was assessed.The double control criterion for shield tunnel undercrossing Chongsilou Building was established based on a consideration of the building existing deformation.A management over the section undercrossing the Chongsi Building proves the feasibility of the deformation control criterion.

Key words:shield tunnel; undercrossing; disturbance; existing deformation of building; double control criterion