采用两种不同螺旋角钻具对粘土进行输土实验，对比阻力结果证明了理论的正确性。
When rotation speed is low, factors effecting soil delivering resistance are the soil volume carried by the vane and the spiral angle of drill.
长螺旋钻管内泵压CFG桩施工技术在太原部分地区扰动敏感性土中应用时，常出现严重缩径质量问题。
Serious necking quality problems often appear when the CFG piles construction technology of long spiral drill pipe by pump pressure apply in some disturbed sensitive soil areas of Taiyuan.
对螺旋钻具输土速度与阻力进行理论分析，给出了输土速度公式和阻力公式。
The speed of soil delivering and resistance of auger drill are analyzed theoretically and their formulae are presented.
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