Study on treatment mechanism to improve the deformation performance of expansive soil

expansive soil;  small piles without grit;  Reinforce cohesion

As a regional special soil, expansive soil has the characteristics of engineering deformation of water immersion expansion and water loss contraction, resulting in unstable mechanical properties. Starting from improving the mechanical properties of expansive soil and meeting the requirements of bearing capacity and deformation of the project, the treatment mechanism for improving the mechanical properties of expansive soil is studied and summarized according to the maintenance and reinforcement project of a dangerous bridge. The post-construction test results show that the modification treatment of expansive soil by compacted grouting piles without sand concrete is scientific in theory and feasible in practice, which can provide a certain reference for similar reinforcement projects.