建筑物对浅埋隧道开挖地表沉降的影响

采用解析法研究穿越地表建筑物浅埋隧道开挖引起的地表沉降。由无建筑物时岩土体开挖引起的地表沉降公式及半无限平面在均布荷载下的相对沉陷，推导出了穿越地表建筑物浅埋隧道施工引起的地表沉降公式，并通过实例验证了此方法的可行性。采用上述方法研究了地表建筑物的重量及其与浅埋隧道位置关系对地表沉降的影响，研究结果表明：浅埋隧道开挖引起的地表沉降随建筑物重量的增大而增大；建筑物中心到隧道轴线的水平距离是对地表沉降的一个重要影响因素，超过一定范围时建筑物的存在对地表沉降的影响可以忽略不计。研究结果可为类似隧道工程提供一定参考。

The Influence of the Building on Ground Settlement Caused by Excavation of Shallow Tunnel

By using analytical method, the excavation induced ground ground settlement is analyzed. Through surface subsidence Caused by rock-soil excavation and the the relative subsidence caused by distributed load on semi-infinite plane , the ground settlement formular caused by the shallow tunnel excavation across the surface buildings. Through examples given, the feasibility of this method is proved. By using the following method, the influence of the weight of the buildings and the position relations between shallow tunnel and building on ground settlement are analyzed. The results of the study indicate that： The ground settlement caused by the shallow tunnel excavation is increased with the increase of building＇ s weight; the distance of building center to tunnel axis is one of the important factors, that influence of the existing building on ground settlement is negligible when ground building is over a certain range of distance. The research results can provide certain reference for existing similar tunnel engineering.