浅谈提高工勘中岩心采取率的几点措施

A Brief Talk on Some Measures to Raise Core Recovery in Engineering Geological Exploration

工程地质勘察的钻探工作中取出比较完整的原状岩心是工程勘察的必然要求。由于建设工程主要是在地表覆盖层中进行,因此钻探工作必然面临包括砂卵石层、砂层、风化破碎、松散破碎层、土层、泥岩、页岩等水敏性岩层,以及不同程度的破裂带、地层剥离带、泥石流带等。因此,根据施工中钻进的复杂岩层,选取正确有效的泥浆类型和适当的岩心采取技术,对减少孔内事故,提高岩心采取率,提高钻探质量,实现安全快速钻进具有重要的意义。

Raising core recovery is of importance to the core drilling in engineering geological exploration.This paper deals with thee kinds of measures to raise core recovery in engineering geological exploration.