西安南京铁路W8标段以路基土石方工程为主，土石方工程以膨胀土为主，主要有膨胀土路堤（堑），膨胀土浸水路堤、水塘路堤（堑）、软土路堤等。主要介绍该标段膨胀土水塘路堤、软土路堤基底处理技术和膨胀土路堤（堑）的施工及边坡、基床防护技术。

Subgrade works and earth/rock works are the major contents of W8 contract section of Xi’an～Nanjing railway. The earth/rock works in the contract section are dominantly swelling soil works, including embankments/road channels in swelling soils, embankments in saturated swelling soils, embankments/road channels in water ponds and embankments in soft soils. The article places its emphasis on the description of the bottom treatment technology of embankments in water pond in swelling soils and embankments in soft soils, as well as the construction technology, side slope protection technology and foundation protection technology of embankments/road channels in swelling soils.