Safety technical measures for grouting construction of new well bottom yard
(1) Size and arrangement of grouting pipe: 1. Grouting pipe use specification: Φ20×3000 grouting pipe for over-excavation over 500mm, over-excavation less than 500mm and Φ20×2500 grouting pipe for bottom plate, grouting pipe row spacing is 2m×2m, error ±100mm, exposed length 10
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