在工程实施期间，承包商应使现场避免出现一切不必要的障碍物，存放并妥善处置承包商的任何设备或剩余材料。
During the execution of the Works, the Contractor shall keep the Site free from all unnecessary obstruction, and shall store or dispose of any Contractor's Equipment or surplus materials.
某地下车站工程施工时，遇到原有建筑的桩基础需拔除，采用全回转设备清除地下障碍物具有对地下原状土破坏小、基本不扰动地下土体的优点。
It is of some advantages to use full-rotating equipment to clear underground obstacles such as little destructive effect for undisturbed soil and no disturbing the underground soil body.
磁梯度探测方法可以高效、高精度探测具有铁磁性的地下障碍物深度，因此在工程基桩长度测试中有良好的效果。
The magnetism gradient test is a highly effective and high accuracy method which used to detect the depth of ferromagnetic obstacle under ground, and it is very suitable to detect the length of pile.
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