Geoprobe直推式土壤钻机在涌砂层中的应用

Application of Geoprobe direct push & rotary rig in sampling in quicksand layers

摘要:

本文介绍了Geoprobe7822DT、Geoprobe 8040DT、Geoprobe 3230DT三种型号直推式土壤钻机的结构、主要特点和应用情况，并与其他类型功能相近的取样钻机的使用效果进行了对比，分析了Geoprobe直推式土壤钻机在涌砂层钻进中存在护壁功能不足、整体稳定性较差、钻杆易损等主要问题，并对直推式土壤钻机后续的改进和使用提出了建议。

Abstract:

This paper introduces the structure， main features and application of Geoprobe7822DT， Geoprobe 8040DT and Geoprobe 3230DT direct push soil drilling rigs， and compares them with other types of similar sampling rigs. Analysis is conducted on their inadequacies in quicksand sampling such as insufficient wall protection， poor overall stability， and easy drill pipe damage with suggestions put forward for further improvement and use of the direct push soil drilling rigs．