巨厚松散层裸孔施工技术措施

Construction Technology of Bare Holes in Thick Unconsolidated Layers

针对巨厚松散层在钻孔施工中易出现钻孔孔壁坍塌、掉块、缩径,造成埋钻、粘钻、卡钻,找不到原孔而形成岔孔等钻孔事故,简述了在巨厚松散层钻孔裸孔安全施工的要点和注意事项。

Pointing to problems occurred in drilling construction in thick unconsolidated layers, such as hole walls collapse, fall - block, reducing diameter which will cause burying drilling, sticking drilling, can not find the original holes and form forked drilling holes. Countermeasures and precautions for safe construction in thick unconsolidated layers have been introduced briefly.