摘要
由松散堆积层组成的滑坡体,勘察钻探中岩芯采取困难,滑坡勘察对钻探要求全采芯钻进,岩芯采取率和岩芯质量要求高,普通双管钻具难以达到要求。采用新型双管取芯钻具,提高了岩芯采取率,减少了对原状土的扰动,可取得高质量岩土样。新型双管取芯钻具采用PVC内管、单向阀、卡芯装置,简化了钻具结构,具有高效、高性价比、低成本、低能耗和操作性强等优点。该钻具经实际工程应用检验,使用效果良好。
It is difficult to obtain core sample in loose accumulation strata. Full coring is always required in the landslide investigation. High recovery and quality is difficult to achieve for the normal double barrel drill equipment. A new type of double barrel sampler could improve the core recovery,minimize the disturbance and obtain high quality samples. The new type of double barrel sampler with simplified drilling structure,using PVC lining,one-way valve and bayonet device is advanced with high efficiency,high cost effective,low cost,low energy consumption and easy operation. The equipment is proved successful in the engineering practice.
出处
《工程勘察》
2017年第10期34-37,共4页
Geotechnical Investigation & Surveying
关键词
新型双管取芯钻具
滑坡勘察
取芯
岩芯采取率
卡芯装置
new type double barrel core sampler
landslide investigation
coring
core recovery ration
bayonet device
