Interaction of Deep Excavation Groups Constructed with Ultra-Deep Diaphragm Walls
A comprehensive underground engineering projects normally have concerns of mutual deep excavation groups affect-ing each other.Due to the close distance between deep excavations and staggered construction periods,the deformations and the stresses in deep excavation groups are usually more complex than a single excavation project.Based on an actual engineering project,this paper conducts two-dimensional numerical analysis of the interaction between the construction of the ultra-deep un-derground diaphragm wall deep excavation groups,considering the different earthwork excavation sequences of the adjacent ground walls.The results show that:1)The main impact area for the physical deformation and the different earthwork excava-tion sequences of the underground diaphragm wall is the adjacent range of the underground diaphragm wall,with no effect on the external underground diaphragm wall;2)The earth excavation sequence will affect the surface settlement among under-ground diaphragm walls,and the maximum settlement point will deviate from the area of ground walls excavated earlier;3)The earthwork excavation sequence has limited settlement effects on the outside the ground wall;4)The deformation of the pipeline is mainly affected by the excavation of the adjacent underground diaphragm wall,while the pipeline far from the under-ground diaphragm wall construction has had little impact.
万方数据
维普
