水泥掺量对膨胀土抗剪强度的改性影响

Effect of Cement Content on Shear Strength Modification of Expansive Soil

膨胀土由于其遇失水胀缩的特性,对建筑工程的安全性及稳定性造成威胁。目前,采用物理、化学、生物等方法对膨胀土进行处理可以提升其强度及稳定性。文章通过选取M32.5级水泥,对南水北调中线一期引江济汉工程渠道地区膨胀土样本进行改性,将改性后的土样抗剪强度与未改性的重塑土样进行对比,探究M32.5级水泥对于重塑土样的改性机理,并为工程建设提供理论依据及应用建议。

Expansive soil is a threat to the safety and stability of construction projects due to its expansion and contraction in water.At present,physical,the treatment of expansive soil through chemical,biological and other methods can improve its strength and stability.In this paper,M32.5 grade cement is selected to modify the expansive soil sample of Yangtze River to Hanjiang River Water Diversion Project of the Middle Route of South to North Water Diversion Project.The shear strength of the modified soil sample is compared with that of the unmodified remolded soil sample to explore the modification mechanism of M32.5 grade cement for the remolded soil sample,which can provide theoretical basis and application suggestions for project construction.