应用旋转触探试验划分地层及确定土类定名方法研究

旋转触探作为一种新型原位测试技术已通过生产实践检验并在岩土工程勘察中逐步推广,然而有关其工程化应用问题尚有待完善。本文通过在京津城际线、京沪高铁线桩基试验点、邯郸至黄骅铁路线等地开展现场旋转试验,并将所得旋转触探试验结果与相应点位的静力触探及钻孔化验资料进行对比分析,初步总结出应用旋转触探试验结果划分地层、确定土的定名方法的一些规律,所得结果为推动旋转触探工程化应用提供了重要依据。

Study on stratigraphic division and soil classification by using rotary penetration sounding tests

Rotary penetration sounding as a new in-situ testing technique has been adopted in geotechnical practice,however its engineering applications should be perfected.The rotary penetration sounding tests are conducted for the pile foundation testing in the Beijing-Tianjin intercity railway,the Beijing-Shanghai high-speed railway and the Handan-Huanghua railway.About 700 measured data from the rotary penetration sounding tests are obtained.The data are analyzed and compared with the corresponding data from CPT and drilling.Some practical rules are derived for the stratigraphic division and soil classification by using rotary penetration sounding tests.The study provides an important basis for promoting the application of rotary penetration sounding.