武都水库坝基抗滑稳定研究钻探取心工艺

Drilling Coring Technology for Study on Stability against Sliding in Dam Foundation of Wudu Reservoir

摘要:

为了配合武都水库技施阶段坝基抗滑稳定的进一步研究，查明坝基岩体中的断层破碎带、层间错动带以及缓倾角裂隙较发育等软弱结构面的特征，在钻进中采用清水金刚石钻探工艺，配以SDB双级单动半合式内管金刚石钻具，使岩心采取率基本达到了100%，取出了原状结构的岩样，为坝基的抗滑稳定研究提供了可靠的依据。

Abstract:

In order to cooperate with the further study on stability against sliding in dam foundation of Wudu reservoir, and ascertain the characteristics of the weak structural plane such as fault fracture zone, inter-laminar dislocation band and low-angle fracture, diamond drilling technology was adopted by fitting with SDB double stage and single action diamond drilling tool with two-halves barrel. Coring recovery rate was 100%, the undisturbed rock samples provided reliable basis to the study on stability against sliding.