In order to study the reinforcement mechanism and overall elastic properties of this support composite material, an equivalent homogeneous elastic model of orthorhombic layers is established by making use of conditions of force equilibrium deformation compatibility and equal stored strain energies.
Firstly, the engineering properties and reinforcement mechanism of geogrids are introduced in the dissertation, and it is compared with another geosynthetics reinforcement --geotextile on the base of consulting the national and international materials.
Then introduce geosynthetic the kind of function and both here and abroad application status, the reinforcement mechanism of the analyses geotextile,friction reinforcement theory and like cohesion theory.
On the basis of analysis on the pairwise action of cement paste, nanometer silica fume and clay, the paper proposes the reinforcement mechanism of the cemented soil stabilized with nanometer silica fume. The reinforcement mechanism includes cementation action of cement hydrate, ionic exchange and quadrate reaction of clay particle, pozzolanic effect, filling effect and cementation action of nanometer silica fume.
Results of analysis on the reactions between the nanometer silica fume and clay were the basis of the proposed cemented clay reinforcement mechanism, which provides theoretical and practical foundation for further application of nanometer silica fume in cemented soil.