Is PTH and small via hole wall quality checked by cross-section and followed by a closed loop corrective action?
是否通过切片检验pth与小导通孔孔壁状况，并有相应的改善对策跟踪？
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。
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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