Studying the foundation treatment techniques of soils soil has become more important to improve the investment environment

speeding up the Bohai sea region development

using land resources scientificlly and rationally. The key of the foundation treatment techniques

scientific or not

is revealling the nature of factors which affect the deformation and strength of the soft soil from the structure characteristics of the soft soil.The quantitative parameters of the soft soil micro-structure is established by integrating the marine deposits soft soil physico-mechanical properties and microstructural characteristics with the deposited soft soil of the Tang-Cao(Tanshan-Caofeidian) highway as the research object. It conducts a systematic analysis between the microstructure and macro-mechanical properties of the marine deposited soft soil by indoor experiment and theoretical analysis. It also carries out the analysis and proof about the structural strength and engineering effects of the marine deposited soft soil. A pore structure factor has provided as integrated parameter

which integrated parameters to measure the structure strength and failure trend based on the fractals evaluation theory. And solving the pre-consolidation pressure at the same time

the structural strength of the soil can be determined quantitatively. It is a successful example and is helpful to engineers.