Hello expert$"$In geotechnical engineering, soil compaction plays a critical role in ensuring the stability and durability of structures. Discuss the key factors influencing soil compaction and its importance in construction projects. Highlight the methods and equipment commonly used for achieving optimal soil compaction levels. Additionally, explore the consequences of inadequate soil compaction on the performance and longevity of structures. Provide examples of real$-$world scenarios where proper soil compaction practices have led to successful construction outcomes."