泡沫钻探在岩土工程勘察中的应用与实例操作

Application of the Air-Foam Drilling in the Geotechnical Investigations

介绍了泡沫钻探的发展历史与现状、原理、优缺点和适用条件。泡沫钻探对缺水或水源供应困难地区、斜坡或挡土墙附近对流动水敏感地区、对环境保护有特别要求地区以及对取样精度有特别要求地区等具有一定的优势。泡沫钻探的成功取决于泡沫活性剂的配置比例,风量的控制,机长的实践经验等因素。通过香港工程实例介绍了泡沫钻探的具体操作方法、实际效果和注意事项等,并分析了泡沫钻探在我国岩土工程勘察中的应用前景和实践意义。

This paper introduces the history,development,advantage,disadvantage and the state of the art applications of the air-foam drilling technique.The air-foam drilling is an attractive method in the draught or no water supply areas,slopes or areas near the retaining wall that are sensitive to the water seepage,areas with high environmental requirements and locations with high quality of soil samples.The quantity of the foam additives,control of air and the experience of the driller are critical to the success of the air-foam drilling.This paper introduces the application of the air-foam drilling method in a project in Hong Kong.