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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。
The development history, current situation, principle, advantages, disadvantages and applicable conditions of foam drilling are introduced. Foam drilling has certain advantages for areas with water shortage or water supply difficulties, sensitive water areas near slopes or retaining walls, areas with special requirements for environmental protection, and areas with special sampling requirements. The success of foam drilling depends on factors such as foam activator configuration, air volume control, and pilot’s experience. Through the example of Hong Kong project, the concrete operation method, actual effect and precautions of foam drilling are introduced, and the application foreground and practical significance of foam drilling in geotechnical investigation of our country are analyzed.