Underground engineering excavation will disturb strata and causes ground settlement . it is significant to study ground settlement caused by underground engineering excavation and to reduce adverse effect on existent facility 研究城市地下工程开挖引起的地表移动和变形，对于减少开挖对地表和地下已有设施的不良影响，对于保护地表环境具有十分重要的意义。
