In order to explore the processing method of foundation stabilization. Large-scale field tests on a soft ground composed of a 2-5 m thick mucky soil were conducted in Jiangsu province

involving five ground improvement methods

on a soft ground composed of a 2-5 m thick mucky soil. These tests included packed-drain with explosion

plastic-drain with surcharge

cement-jet-pilling at different spacing

and sand mat. During 14 months’ in situ testing

the deformation behavior of the improved soft ground was investigated

and by comparing with the reinforcement scheme

the settlement after completion and economical efficiency of project are also studied. These results are expected to provide the reference value for the selecting of soft ground treatment methods and design parameters of high-speed rails.