Analysis of bearing capacity of cohesive soil subgrade considering soil strength increasing

In recent years, many piled mountains were built up; the characteristics of piled mountains are that the loads are staged applied; the construction period is long, and total load is huge. Ground bearing capacity frequently cannot be satisfied by conducting common ground treatments. Considering the time interval between staged applied loads is usually long, consolidation occurred and the effective stress increase in this period; thus the strength of soil increases and ground bearing capacity increases correspondingly. Utilizing the increase of bearing capacity caused by the increase of soil strength is the key factor for the success of piled mountain. The increase of soil strength caused by consolidation is analyzed by effective consolidation stress method; a ground bearing capacity analysis method considering the increase of soil strength is proposed; and two piled mountain cases are analyzed by this method. Finally, some suggestions are offered for similar engineering.