半合式单动双管在工程地质勘察中的应用研究

Application of semi closed single acting double pipe in engineering geological investigation

为满足工程地质勘察对钻探质量的要求,如何选用钻探取心工艺是关键的一步。通过对半合式单动双管结构特点、组装与拆卸方法、工作原理的介绍,在实际应用中选用半合式单动双管钻探取心工艺,并进行分析研究,不但使岩心采取率得到极大提高,也使所采取的岩心能较好地反映出原地层构造特征,提高了工程地质勘察质量。

In order to meet the requirements of engineering geological survey on drilling quality,how to select drilling coring technology is a key step.Through the introduction of the structural characteristics,working principle,assembly and disassembly methods of the semi closed single acting double pipe drilling,the core taking technology of the semi closed single acting double pipe drilling is selected in the practical application,and the analysis and research is carried out.The core recovery rate is greatly improved,and the core can better reflect the structural characteristics of the original stratum and improve the quality of engineering geological investigation.