ANALYSIS OF SUBGRADE SETTLEMENT INFLUENCED BY NEARBY EXCAVATION DEWATERING

In the deep excavation construction process, the influence on the settlement of nearby building due to dewatering is always hardly ignored. In this paper, the influence on railway subgrade foundation by the dewatering of excavation engineering of the nearby new construction Jinan west station of Beijing-Shanghai High-speed Railway Line is studied. The settlement data of pile foundation subgrade of the high speed railway line are monitored and collected during the whole construction period to analyze the influence on composite foundation due to the dewatering of deep excavation. The settlement of both the top of pile and the soil between plies are recorded. And the construction period includes the following three phases: a) embankment fill period of high speed railway line subgrade construction, and b) preloading period of high speed railway line subgrade construction, and c) excavation engineering of station accessory building. As the conclusion, a general law of the influence on the composite foundation due to the dewatering of nearby deep excavation was summarized in this paper as a reference for other similar project in future.