竖井开挖采用了临时混凝士衬砌护壁措施。
The temporary concrete lining guard wall method was used in excavating vertical shaft.
工程实践表明，跟进衬砌悬挂混凝土是保证复杂地质条件下大型竖井工程施工安全的重要技术措施。
Engineering practices show that lining hanging concrete in time is an important technique to make sure of the construction safety of large-scale surge tank project at complex geologic condition.
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