| Abstract:This article analyzes the current technical standards and industry status for obtaining undisturbed soil samples, comprehensive analysis of drilling methods, sampling tool selection suitability, soil sample packaging and transportation methods are studied. Comparative experimental research shows that in the first stage terrace of the Yangtze River in Wuhan, hammer drilling combined with open thin-walled soil samplers in clay layer, hammer and rotary drilling combined with built-in ring cutter soil samplers in sandy soil layer, supplemented by rubber cover and tape sealing, the original samples obtained have shown excellent performance in on-site quality evaluation, indoor sample preparation, and experimental performance. The original structure of the undisturbed sample obtained based on this method is less disturbed, and the original structural force of the soil is also maintained well. |
