目前国内对于隧道变形和开裂的研究较少，经验积累不多。本文介绍了某地区明挖地铁隧道的沉降情况，分析了沉降发生的原因，指出临近隧道的基坑开挖及工程降水是沉降发生的两个原因，针对沉降隧道进行了结构安全评估，并给出了修复措施，为类似工程修复提供参考。%Few researches on tunnel deformation and cracking is available in China. In this paper, we introduced the settlement of metro tunnels in a certain area. By analyzing the causes, we pointed out that the foundation pit excavation and dewatering adjacent tunnel were the two main causes of settlement. Based on the safety evaluation, we provided the repair methods.
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