中文摘要：

置换式水泥土桩具有独特的优越性在昆明地区泥炭及泥炭质土中得以广泛应用,但不同置换用土的物质组成和工程特性都普遍存在差异。本文选用昆明地区的冲洪积黏性土作为水泥土原材料,通过室内试验对其强度性能做了简单研究,分析了水泥土强度的增长与掺入比及龄期的关系。试验结果显示,冲洪积黏性土水泥土的强度随着掺入比的提高呈现出先快后慢的二次曲线增长规律;龄期与强度呈现出常用对数的增长规律;并且最后得到了由前期（7d）强度预测最终（90d）强度的经验公式。

英文摘要：

Due to the unique advantages, the replaced cement-soil pile has been widely used in the peat and peat soil in Kunming, but the material composition and the engineering properties of the soils with different replacements are generally different. A preliminary research was conducted in the paper： the alluvial cohesive soil in Kunming area was chosen as the raw materials of cement soil, and then its strength properties were studied by using an indoor test and the growth tendencies of the strength versus the mixing ratio and the age were analyzed. The experimental results show that the strength of alluvial clay cement presents a quadratic curve-law of fast followed by slow with the increase of the addition, and the curing age-strength curve is a ,common logarithm relationship. Finally, the empirical formula is ob- tained to predict the ultimate （90d） strength from the early strength （7d）.