To study the mechanical properties of ditch-buried steel corrugated pipe culvert. In this paper, based on the reconstruction and expansion project of Yan'an, section “A” and “B” of corrugated steel culvert are selected for field test and numerical simulation. The results show that: in the process of soil filling, the shear strain of corrugated steel pipe culvert fluctuates with the change of the height of the pipe side and the overlying soil, the maximum tangential strain in the internal measurement is 503  and the maximum tangential strain at the external measuring point is 680 ; the field measured results are in good agreement with the finite element results; the vertical earth pressure at the top of the pipe culvert is the largest, so the earth pressure on the top of the pipe should be taken as an important reference in the design and calculation.

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