Study on Selection of Road Soft Foundation Treatment Scheme

The quality of road soft foundation treatment directly affects the driving safety and comfort. To determine an economic, reasonable and environmental friendly soft foundation treatment scheme is the key to the success or failure of road soft foundation treatment. The technical feasibility analysis is carried out from the aspects of geological condition adaptability, subgrade stability, construction period requirements, foundation bearing capacity requirements, post construction settlement value requirements, etc; The economic rationality should be analyzed from the aspects of soft foundation treatment engineering cost and operation and maintenance cost; Environmental impact analysis shall be carried out from the aspects of environmental impact from surrounding area, during construction, and during operation, as well as resource consumption. According to the analysis results of technical feasibility, economic rationality and environmental impact, the analytic hierarchy process is introduced to establish the analytic hierarchy process model of soft foundation treatment scheme selection. Combined with expert decision system and fuzzy theory, the influencing factors are quantitatively evaluated, so as to simplify the complex non quantitative factor problem. An example is given to verify the adaptability of analytic hierarchy process model in the selection of soft foundation treatment scheme.