Abstract: To validate the stabilization effect of stabilizing agent GX08 treating the marine and lacustrine soft soil in Hangzhou, and to investigate the adverse influence of organic matter on cementing soft soil, unconfined compressive strength (UCS) tests are performed on stabilized soils. Test results indicate that organic matter significantly hinder the growth of the strength of stabilized soil, whereas stabilizing agent GX08 can effectively enhance the strength of the stabilized soil. The results show that the strength of stabilized soil is well correlated with organic matter content as a form of quadratic function, and it is correlated linearly with cement content, and both are correlated as the form of logarithmic function with stabilizing agent GX08 content and curing time. The total cement/water is applied to the establishment of the stabilized soil strength model. Based on the analysis of tests data, a predict model, considering the influences of organic matter content, cement content, stabilizing agent content and curing time on the strength of stabilized soil, is proposed to predict strength development. Finally, the model is to be promoted to use, so as to verify the applicability of the model.

Key words: humic acid, stabilizing agent GX08, strength ratio, predict model, total cement/water