Research on Soil Characteristics and Controlling Technology of Differential Deformation of Expressway Widening Subgrade in Seasonal Frozen Region -- Developing an Efficiency Equation for Tapered Pile Groups in Sand Using Mathematical and Numerical Analyses -- Analysis of the swelling shrinkage cracks development rules of improved expansive soil based on image processing technology -- Temperature spatial and temporal distributions of pavements with various paving materials -- Used Paper Fibers for Sustainably Enhancing the MICP Stabilization of Sand -- A field study on the utilization of recycled concrete aggregate in drainage systems -- Application of Lightweight Soil as Sustainable Backfill for Railway Bridge Approach Zone -- Numerical Modeling of Grout Injection for Hybrid Bored Prestressed Concrete Cased Piles. .