Abstract: This paper presents a box culvert jacking project at the exit of a Jinan subway station. The mechanical model of “the influence the box culvert jacking construction on the deformation and stress of the adjacent water supply pipeline” is therefore established. Combined with on-site monitoring, the analysis of the influence of large cross section pipe jacking construction closely passing through a main water supply pipeline in the urban area are also presented in the paper. The following conclusions are obtained: during the construction of the box culvert jacking, the deformation of the existing pipeline is first uplift and then settlement, the deformation in the middle of the existing pipeline is the largest, and the deformation decreases gradually along the axis to both sides. With the increase of the jacking length, the deformation of the existing pipeline is mainly divided into three stages: uplift stage, rapid settlement stage and stabilized settlement stage. The box culvert jacking length of the pipeline in the rapid settlement stage of the project is 15-35m (the pipeline is located at the jacking length of 20m). With the increase of jacking length, the axial and radial stresses of the pipeline increase. When the jacking length is between 15-35m, the pipeline stress increases sharply.

Key words: Large Cross Section, Box Culvert Jacking, Closely Crossing, Important Water Supply Pipe, Construction Impact