Behavior of Reinforced Embankment on Soft Ground With and Without Jet Grouted Soil-Cement Piles

摘要

Two full scale reinforced test embankments were constructed on soft Bangkok clay. Test Embankment 1 (TE1), 5.8 m height and reinforced with steel wire grids, was constructed over an unimproved soft ground. Test Embankment 2 (TE2), 6.0 m height and reinforced with hexagonal wire mesh, was constructed over a jet grouted soil-cement piles improved ground. After their construction, the maximum lateral movements in the foundation soils were 130 mm and 5 mm under TE1 and TE2, respectively. After one year of full embankment loading, the maximum settlement of TE1 was 1000 mm, while that of TE2 was only 325 mm; also, the maximum wall face lateral movements were 350 mm and 230 mm for TE1 and TE2, respectively. Moreover, the rate of consolidation settlement of TE2 is faster than TE1. Therefore, the installation of jet grouted soil-cement piles in the soft clay foundation has effected a suitable improvement in the engineering performances of the improved soft clay foundation and of the reinforced wall/embankment.