夯实水泥黄土抗剪强度试验研究

为了探索夯实水泥土桩在黄土地区的适宜性及可靠性,通过直接剪切试验,分析了不同影响因素对夯实水泥黄土抗剪强度及相关指标的影响。结果表明,夯实水泥黄土的强度较原状黄土有很大提高;夯实水泥黄土的抗剪强度和粘聚力均随着初始含水量的增大先增大后减小,在最优含水量附近有一峰值;夯实水泥黄土的抗剪强度和粘聚力均随着水泥掺入比的增加而增大;内摩擦角与各影响因素之间未发现明显的变化规律。

Experimental Study on Shear Strength of Compacted Cement-loess

In order to explore the suitability and the reliability of compacted soil-cement pile in loess districts,in this paper influence of different factors on shear strength and relative parameters of compacted cement-loess are analyzed through direct shear test.The results show that the shear strength of compacted cement-loess improves greatly contrasted with intact loess.The shear strength and the cohesive of compacted cement-loess first increase then decrease as initial water content increases and a summit exists nearby optimum moisture content.The shear strength and cohesive of compacted cement-loess grow as cement mixing ratio rises.No law is founded between angle of internal friction and different influencing factors.