| dc.description.abstract | Recently the unbraced double-row rail pile retaining system has been developed and used in the good field ground condition. However, there are only a few follow-up researches which study the factors that affect the stability of retaining system, deformation of adjacent ground buildings.
In this research, by using the unbraced rail piles retaining system, two series of centrifuge modeling tests are used to study how these five factors, including the piles spacing in the single-row system, the spacing of the front and rear row piles in the double-row system, the distance between the rows in the double-row system, and the relative density of the sand affect the adjacent areas and buildings.
The results show the necessity of constructing a tie beam on top of the pile head. Increasing the density of the sand and smaller spacing between the piles in the same row reduce the horizontal deformation and the settlement of the whole retaining system. In the double-row rail piles system, the spacing between the piles in the front row influences the stability of the retaining system more obviously than that in the rear row. Also, increasing distance between the front and rear row in the double-row system reduce the deformation and improve the stability of the retaining system. In the process of the excavation, with the increasing of excavation depth, the axial force of the piles near ground surface also increases. Moreover, the research demonstrates that only the numbers of the row in the retaining system affect the relation between the maximum horizontal displacement of the wall and the maximum surface settlement behind the wall. | en_US |