METHOD FOR ERECTION OF URBAN RING HIGHWAY SECTION MEGAPOLIS Russian patent published in 2000 - IPC

FIELD: highway engineering, applicable in construction or reconstruction of road junctions at different grades of trunk highways in the conditions of narrow urban building. SUBSTANCE: the method consists in construction of the surface section, motor-road tunnel and at least one junction of ring highway with a radial highway. The novelty is in the fact that the tunnels are arranged in the axis of the ring highway and made in length with two sections curvilinear in plan, facing the opposite sides with the convex part, and formation of the middle rectilinear section located between them, and rectilinear terminal sections; the angle between the axis of one rectilinear terminal section and the axis of the middle rectilinear section is taken to be equal to 39 to 47 deg., and the angle between the axis of the other rectilinear terminal section and the axis of the middle rectilinear section - 23 to 31 deg. , and the junction of ring and radial highways is made at different grades; the radial highway at erection of the ring highway is arranged at the surface level, and the roadbed of the junction of the ring highway with the radial one is positioned on an overpass that is erected in the axis of the ring highway, and the roadways of the overpass and tunnel are conjugated with the surface section. EFFECT: reduced labour and material costs and scope of excavation at simultaneous provision of a high prevented jammings on motor roads, deformations of overground structures and improved ecology. 18 cl, 11 dwg