Jet grouting is a developing technology for soil improvement in most soil types. It offers advantages such as relatively short execution and a high volume of soil rehabilitation. Nonetheless, due to the complexity of this method, related scientific research is ongoing. This study presents a design and fabrication process for equipment capable of constructing soil–cement columns using a high-pressure injection mechanism at the laboratory scale. The columns are constructed using the device in Firouzkouh 161 silica sand. The effect of energy on the diameter of the columns constructed at laboratory scale is evaluated. The behaviour of such columns built using full-scale elements is evaluated using resistance testing on core-sampling specimens. The results showed that an increase in pressure injection leads to logarithmic growth in the diameter of the element. It was found that an increase in pressure had a greater effect on the diameter than an increase in injection duration. The uniaxial compressive strength of the specimens showed a 35% decrease in the horizontal core in comparison with the vertical core. The compressive strength of columns without core sampling was 2.3–2.5 times that of the columns with core sampling.

中文翻译：

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使用实验室秤确定喷射灌浆元件的行为

旋喷灌浆是一项正在开发的技术，可用于大多数土壤类型的土壤改良。它具有诸如相对较短的执行时间和大量的土壤修复等优势。尽管如此，由于该方法的复杂性，相关的科学研究仍在进行中。本研究介绍了一种能够在实验室规模上使用高压注入机制构建水泥土柱的设备的设计和制造过程。这些柱子是使用 Firouzkouh 161 硅砂中的设备构建的。评估了能量对以实验室规模建造的柱子直径的影响。使用全尺寸元件建造的此类柱子的行为是通过对岩心取样样本进行电阻测试来评估的。结果表明，压力注入的增加导致元件直径的对数增长。发现压力增加对直径的影响大于注射持续时间的增加。试样的单轴抗压强度显示，与垂直岩芯相比，水平岩芯降低了 35%。无岩心取样柱的抗压强度是岩心取样柱的 2.3-2.5 倍。