7Vaslestad J,Johansen T H,Tolm W. Load reduction on rigid culverts beneath high fills,long-term behavior[R]. Transportation Research Record No.1415,1993.
8Okabayashi K. Ohtami W. Centrifugal model test for reducing earth underground structure pressure on the culvert by using the flexible material[A]. In:Proceeding of the International Offshore and Polar Engineering Conference Vl[C]. [s. l.]:[s. n.],1994. 620-624.
