粉喷桩施工的现代质量控制技术

阐述目前我国粉喷桩施工技术的发展现状及存在的问题 ,介绍计算机控制的粉喷钻机基本原理及各参量控制过程 .通过对两种机械施工结果的比较可知 ,由计算机控制施工的粉喷桩 ,桩体各段搅拌均匀 ,含粉量上下基本一致 ,无侧限抗压强度无大的变化 ,其轻便触探N10 可达加固前的 2倍以上 ,施工质量得到有效控制 ,避免普通施工机械施工所造成的上部质量明显好于下部的现象 ,使施工工艺更加完善

Modern Quality ControlTechnology in the Construction of Jet Flyash Mixing Piles

The present situation of and the existing problems in the construction of jet flyash mixing piles in China are enunciated. The basic principles and the parameter control process of the jet drill controlled by computer are introduced. A comparison of the construction by two kinds of machines shows that the jet flyash mixing pile is mixed evenly at every section, that the ash content is almost the same from the top to the bottom, that there is no significant change in unconfined compression strength, and that the number of N 10 blows reaches two times that before consolidation, indicating that the control of construction quality is effective.