This document discusses various soil improvement techniques including lime stabilization, bitumen stabilization, preloading, wick drains, dynamic compaction, deep compaction methods like vibrocompaction and compaction piles, grouting methods, soil freezing, and the use of geotextiles. It provides guidelines for the amount of lime required for stabilization based on soil type. Deep compaction depth depends on factors like tamper weight and impact spacing. Permeation grouting and intrusion grouting are also covered. The document serves as a reference for selecting appropriate soil improvement methods based on soil conditions and project needs.