开挖步骤 meaning in Chinese

excavation step

Analysis on the ground deformation numerical imitates of shallow tunnel in different excavation
不同开挖步骤引起浅埋隧道地表沉降的数值分析
At last , the law of deformation of pit bottom and surrounding surface in different stress state and in different excavating step is obtained , and the same to the saturatin g process of surrounding soil . to some extent , in predicting the deformation of surrounding soil and retaining structure in construction , in preventing the foundation pit accident from happening , in insuring the security of environment and regular use of pipes underground , and in giving advice to deep loess foundation pit engineering in practice , the conclusion is of theoretical and practical value
得出了不同应力状态下和不同开挖步骤时以及基坑周围土浸湿过程中黄土深基坑坑底及基坑周围地表的变形规律，所获得的结论对于黄土深基坑施工过程中周围土层及围护结构的变形预测，防止黄土深基坑事故的发生及周围环境的安全与地下管道的正常使用，指导黄土深基坑工程的实践具有一定的理论和实践参考价值。