基于PPR建模的全固废材料固化盐渍土抗压强度计算模型

为了实现全固废材料在盐渍土固化中的资源利用，选用电石渣、粉煤灰和矿渣组成一种盐渍土固化剂，对其固化盐渍土的28 d抗压强度进行试验研究，采用投影寻踪回归（PPR）对试验高维数据进行分析，建立28 d抗压强度PPR计算模型，验证了模型的精度和稳定性，最后采用该模型进行仿真计算，探索各影响因素与固化盐渍土抗压强度的关系。研究结果表明:该PPR计算模型具有较高精度和较好的稳定性，各影响因子对抗压强度贡献权重系数顺序为火山灰质材料掺量 > 矿渣占比 > 硫酸盐含量 > 电石渣掺量；仿真计算结果定量描述了各影响因素与固化盐渍土抗压强度间的关系；PPR模型较深入地挖掘了固化盐渍土抗压强度高维数据的内在结构，为全固废材料固化盐渍土的力学性能研究提供参考。

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.