Post-grouting in-situ of length bored pile in deep soft regions

According to the in-situ test,the rule of load transmission property for axial force and frictional resistance in pile,the load-displacement-time curve at the pile top was obtained.The results show that when the grouting pressure is 1-3 MPa and grouting capacity is about 3 t,the frictional resistance around pile accounts for about 93% of the load,and axial force in pile accounts for about 5%.When the load is 4.6 MN,the displacement of pile top is decreased by about 23% through grouting around pile side and 32% through grouting around pile tip.The grouting method is one of effective technologies for the decrease and acceleration of settlement after construction.