ANALYSIS OF THE EFFECTIVENESS OF DEEP FOUNDATION PIT EXCAVATION IN SOIL AND ROCK ON THE DEFORMATION OF ADJACENT PIPELINES
This paper investigates the influence of pile-anchor supported deep foundation pit excavation in soil-rock composite stratum on the deformation of adjacent pipeline.Taking the deep foundation pit project of Shandong Uni-versity Qilu Hospital Phase II Project as the object,we reveals the influence of different distances between pipeline and foundation pit,and different soils around the pipeline on the pipeline's deformation through the combination of Midas finite element simulation and on-site monitoring method.The results show that the vertical deformation of the pipeline is in the form of notch,and the uneven deformation is the largest in the range of-10~20 m at the end of the pit;the displacement of the pipeline is negatively correlated with the burying distance of the pipeline,and has a greater influence in the range of 0.85 H;the change of elasticity modulus of the soil around the pipeline has a greater influence on the transverse displacement of the pipeline,in which,the larger the elasticity modulus of the soil is,the smaller the deformation of the pipeline is.The research results may provide the reference for similar projects.
soil-rock composite stratumdeep foundation excavationpipeline deformationpile-anchor support