Abstract
To study the modification effect of nano-clay and nano-SiO(2) on cement-reinforced coastal soft soil, the effects of the nano-SiO(2) and nano-clay on the mechanical properties of cement soil were studied through unconfined compressive and unconsolidated undrained shear tests, and the Duncan-Chang model was used to fit the test results. Results show that adding nano-clay and nano-SiO(2) to cement soil improved its compressive and shear strength. The compressive strength and shear strength increased by 18-57% and 3-32%, respectively, with the increase in nano-clay content in a content range of 0-10%. Additionally, nano-clay can enhance the ductility of cement soil. Moreover, nano-clay and nano-SiO(2) improve the shear strength by increasing the internal friction angle by 1°-2° and cohesion of 9-25%, and the cement-stabilized coastal soft soil enhanced by nano-SiO(2) and nano-clay conforms to the Duncan-Chang model well.