COMPRESSIVE STRENGTH MODEL OF SALINE SOIL SOLIDIFIED BY ALL-SOLID WASTE MATERIALS BASED ON PPR MODELING

In order to realize the resource utilization of solid waste material in solidification of saline soil,calcium carbide slag, fly ash and slag were selected to form a salinized soil curing agent,and the 28 d compressive strength of solidified saline soil was studied. Projective pursuit regression (PPR) was used to analyze the high-dimensional test data, and a 28 d PPR calculation model was established to verify the accuracy and stability of the model, Finally, the model was used for simulation calculation to explore the relationship between the influence factors and the compressive strength of solidified saline soil. The results showed that the PPR model had high accuracy and good stability, and the weight coefficients of each influence factor to compressive strength were ranked as the sequence of content of volcanic ash material>proportion of slag>content of sulfate>content of calcium carbide slag; the relationship between the influence factors and the compressive strength of solidified saline soil was described quantitatively; and the PPR model had deeply explored the internal structure of the high dimensional compressive strength data of cured saline soil, which provided references for the study of mechanical properties of cured saline soil with solid waste materials.