Abstract：
According to a foundation pit excavation project adjacent to an operating high-speed railway in soft soil area, using the finite element method, a three-dimensional analytic model incorporating the foundation pit and the subgrade of the nearby high-speed railway has been built, and thus the regularity of how foundation pit excavation and dewatering influence the subgrade of the high-speed railway has been studied. The study shows that when there is a thick very soft silty clay layer of poor-quality soil under the foundation pit, the maximum lateral displacement of the retaining wall occurs at a depth of 1.5 times the depth of excavation. The distance of influence of excavation and dewatering, within which ground surface settlement can be induced, reaches 6.5 times the depth of excavation. The part of the subgrade within the distance of influence of excavation and dewatering where longitudinal settlement and horizontal displacement of the subgrade are induced is much larger than the part of the subgrade that is between the extended transverse boundaries of the foundation pit.
FANG Hao1,2,FANG Lei1 et al. ANALYSIS OF INFLUENCE OF FOUNDATION PIT EXCAVATION AND DEWATERING ON
SUBGRADE OF OPERATING HIGH-SPEED RAILWAY IN SOFT-SOIL AREA[J]. Architecture Technology, 2017, 48(9): 968-.
