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da kou jing ji yan di zhi zuan tan ji shu zai jia ling jiang ting zi kou shui li shu niu zhong de ying yong
Author(s): 
Pages: 32-34
Year: Issue:  9
Journal: Express Water Resources & Hydropower Information

Abstract: 采用大口径基岩地质钻探时,可直接将专门的取芯装置下入孔内将岩芯楔断并提出孔外,不需抽水,不需作业人员下井,操作可靠,取芯成功率高.结合工程实例,介绍了大口径基岩取芯钻探技术在嘉陵江亭子口水利枢纽中的成功应用情况.对大口径基岩取芯钻探技术应用所需的主要设备及工具,以及钻具的组合、钻压、转速、泵量等钻进技术参数做了介绍,并指出了钻进施工中应注意的一些事项.最后,通过在工艺流程、操作方法、取芯工具和取芯...
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