西安黄土的新型旋转触探室内试验研究

The Lab Experimental Research on Xi'an Loess with a New Apparatus of Rotary Penetration

简要介绍了静力触探在我国的发展与局限,并对西安黄土进行了新型旋转触探仪的室内试验研究。通过锥尖阻力的变化分析,认为探头阻力在触探过程中的影响因素主要有触探速率、探头的尺寸(锥底面直径)和土性指标等。试验结果表明,旋转钻进能有效提高设备在坚硬黄土中的触探能力,为静力触探在硬质地层中的应用创造了条件。

This paper introduces the development and limitation of the cone penetration test and the inlab experimental study is made of Xi＇ an loess samples using a novel type of rotary penetration apparatus. It can be considered via the analysis of changes in the probe resistance that the main factors affecting the probe resistance in the penetration process are the penetration velocity, the probe dimention（ cone bottom diameter）, and the parameters of soil behaviors, etc. The experimental results indicate that the rotary penetration can effectively improve the penetration test capacity of the equipment into the hard loess soil, whereby creating the conditions for the application of the cone penetration test to the hard stratum.