岩土与地下工程 2026年 第卷 第01期

DOI: 10. 7672 / sgjs2026010036

双线盾构穿越密集建筑群数值模拟与实测分析

杨 剑¹,付一明²,雷鸣宇¹,丁文其²

作者简介:

杨 剑,工程师,E⁃mail:408962739@ qq. com

作者单位:

1. 中铁南方投资集团有限公司,广东 深圳 518000; 2. 同济大学土木工程学院,上海 200092

基金项目:

国家自然科学基金(52090083);中铁南方投资集团有限公司技术开发项目

摘要:

因轨道交通规划发展需要,地铁隧道穿越民房建筑群的案例日益增加. 通过 ZSoil 建立了盾构穿越全过程有限元模型,计算了地表沉降槽的变化曲线并与现场数据进行了对比,验证了有限元模型的有效性,分析了区域建筑以及地层的整体变形,探究了双线盾构穿越对地表沉降的影响范围. 结果表明:双线穿越后,地表沉降呈非对称分布;距穿越中心 30m 范围内为强影响区,30 ~ 45m 范围为弱影响区,45m 以上为无影响区. 对于不同程度的影响区应采用不同的加固措施;房屋建筑物受先穿越隧道的影响较大,受后穿越隧道的影响较小;房屋建筑受邻近盾构穿越影响大于较远盾构;民房底板为刚体时民房破坏面的法线随着隧道的穿越逐渐指向盾构掘进位置的中点;沉降导致的软弱底板扭转对老旧民房产生了较大影响;老旧民房底板曲面变形后最大局部倾斜角度随盾构掘进逐渐增大.

English:

Due to the needs of rail transit planning and development, the cases of subway tunnelscrossing residential building complexes are increasing. The finite element model of the whole process ofshield crossing was established by ZSoil. The variation curve of the surface settlement trough wascalculated and compared with the field data. The validity of the finite element model was verified. Theoverall deformation of the regional building and the stratum was analyzed, and the influence range of thedouble⁃line shield crossing on the surface settlement was explored. The results indicate that after thedouble⁃line crossing, the surface subsidence is asymmetrically distributed. The strong⁃influence area iswithin 30 meters from the crossing center, the weak⁃influence area is within 30 to 45 meters, and thenon⁃influence area is above 45 meters. Different reinforcement measures should be adopted for differentdegrees of affected areas. Houses and buildings are greatly affected by the initial crossing tunnel and lessaffected by the subsequent crossing tunnel. The influence of adjacent shield crossing on buildingconstruction is greater than that of far shield. When the bottom plate of the house is a rigid body, thenormal line of the damage surface of the house gradually points to the midpoint of the shield tunnelingposition with the passage of the tunnel. The torsion of the weak floor caused by the settlement of the oldhouses has a great impact on the old houses. The maximum local inclination angle of the old house floorafter surface deformation gradually increases with shield tunneling.