shaft wall

基本解释

By grouting behind the shaft wall, improved working conditions, and realized high speed and good quality of shaft construction.
通过壁后注浆封水，做到了干打井，改变了工人的作业环境，实现了优质高效。
The construction of drilled hole with shaft wall protection by drilling mud belongs to the concealed work, the pile quality influences directly the superstructure security and the building subsidence.
泥浆护壁钻孔灌注桩施工属于隐蔽工程，成桩质量的好坏直接影响上层结构的安全和建筑物的沉降。
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The obtained results can be applied to the design of shaft in mine and the identification of fracture accident of shaft wall.
所得结果不仅可用于煤矿立井井壁的设计，而且还可用于立井井壁破裂原因的分析及相应事故的鉴定。

If we managed to dig a several hundred foot vertical shaft and the soil was feeling generous, not collapsing inward and waiting for us to build the wall, the challenge of casting this concrete would still be great.
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